Sokol and nanovg setup

13 files changed, 18908 insertions, 1 deletions

diff --git a/source/saw/_exe.c b/source/saw/_exe.c
new file mode 100644
index 0000000..721afb9
--- /dev/null
+++ b/source/saw/_exe.c
@@ -0,0 +1,2 @@
+#include "_lib.c"
+#include "main.c"
diff --git a/source/tests/_static.c b/source/saw/_lib.c
index 8d1c8b6..8d1c8b6 100644
--- a/source/tests/_static.c
+++ b/source/saw/_lib.c
diff --git a/source/saw/main.c b/source/saw/main.c
new file mode 100644
index 0000000..691307a
--- /dev/null
+++ b/source/saw/main.c
@@ -0,0 +1,83 @@
+//  TODO
+//  - Always use OpenGL ES in both sokol and nanovg.
+//  - Custom OpenGL loader.
+//
+
+#ifdef __EMSCRIPTEN__
+#  define SOKOL_GLES3
+#  define NANOVG_GLES3 1
+#else
+#  define SOKOL_GLCORE33
+#  define NANOVG_GL3 1
+#endif
+
+#include "../kit/time.h" // for timespec_get
+
+//  sokol
+#define SOKOL_APP_IMPL
+#include "../thirdparty/sokol_app.h"
+
+//  nanovg
+#include "../thirdparty/nanovg.c"
+#include "../thirdparty/nanovg_gl.c"
+#include "../thirdparty/android.c"
+
+//  miniaudio
+#define MINIAUDIO_IMPLEMENTATION
+#include "../thirdparty/miniaudio.h"
+
+static struct NVGcontext *saw_nvg;
+
+static void saw_init(void) {
+#ifdef SOKOL_GLCORE33
+  saw_nvg = nvgCreateGL3(NVG_ANTIALIAS | NVG_STENCIL_STROKES);
+#else
+  saw_nvg = nvgCreateGLES3(NVG_ANTIALIAS | NVG_STENCIL_STROKES);
+#endif
+}
+
+static void saw_frame(void) {
+  int width  = sapp_width();
+  int height = sapp_height();
+
+  glViewport(0, 0, width, height);
+  glClearColor(.3f, .2f, .4f, 1.f);
+  glClearDepthf(1.f);
+  glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
+          GL_STENCIL_BUFFER_BIT);
+
+  nvgBeginFrame(saw_nvg, width, height, sapp_dpi_scale());
+
+  nvgBeginPath(saw_nvg);
+  nvgRect(saw_nvg, 100, 100, 300, 200);
+  nvgFillColor(saw_nvg, nvgRGBA(255, 192, 0, 255));
+  nvgFill(saw_nvg);
+
+  nvgEndFrame(saw_nvg);
+}
+
+static void saw_cleanup(void) {
+#ifdef SOKOL_GLCORE33
+  nvgDeleteGL3(saw_nvg);
+#else
+  nvgDeleteGLES3(saw_nvg);
+#endif
+}
+
+static void saw_event(sapp_event const *event) { }
+
+char const *__lsan_default_suppressions() {
+  //  There is leaks in NVidia driver on Linux.
+  return "leak:nvidia";
+}
+
+sapp_desc sokol_main(int argc, char **argv) {
+  return (sapp_desc) {
+    .width      = 1280,
+    .height     = 720,
+    .init_cb    = saw_init,
+    .frame_cb   = saw_frame,
+    .cleanup_cb = saw_cleanup,
+    .event_cb   = saw_event,
+  };
+}
diff --git a/source/tests/_exe.c b/source/tests/_exe.c
new file mode 100644
index 0000000..39412dd
--- /dev/null
+++ b/source/tests/_exe.c
@@ -0,0 +1,2 @@
+#include "../saw/_lib.c"
+#include "main.test.c"
diff --git a/source/tests/main.test.c b/source/tests/main.test.c
index 8d1c8b6..14d3249 100644
--- a/source/tests/main.test.c
+++ b/source/tests/main.test.c
@@ -1 +1,8 @@
- 
+#define KIT_TEST_IMPLEMENTATION
+#include "../kit/kit_test.h"
+
+int main(int argc, char **argv) {
+  return run_tests(argc, argv);
+}
+
+#undef KIT_TEST_FILE
diff --git a/source/thirdparty/android.c b/source/thirdparty/android.c
new file mode 100644
index 0000000..15d1e60
--- /dev/null
+++ b/source/thirdparty/android.c
@@ -0,0 +1,68 @@
+// See: http://www.50ply.com/blog/2013/01/19/loading-compressed-android-assets-with-file-pointer/
+// See: https://github.com/android/ndk/issues/562
+
+#include "android.h"
+#include "nanovg.h"
+
+#if defined(__ANDROID__)
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <android/log.h>
+#include <android/asset_manager.h>
+
+#define LOGV(...) (__android_log_print(ANDROID_LOG_VERBOSE, "NanoVG Demo", __VA_ARGS__))
+#define LOGI(...) (__android_log_print(ANDROID_LOG_INFO,    "NanoVG Demo", __VA_ARGS__))
+#define LOGW(...) (__android_log_print(ANDROID_LOG_WARN,    "NanoVG Demo", __VA_ARGS__))
+#define LOGE(...) (__android_log_print(ANDROID_LOG_ERROR,   "NanoVG Demo", __VA_ARGS__))
+#define LOGF(...) (__android_log_print(ANDROID_LOG_FATAL,   "NanoVG Demo", __VA_ARGS__))
+
+static int android_read(void * cookie, char * buf, int size) {
+  return AAsset_read((AAsset*)cookie, buf, size);
+}
+
+static int android_write(void * cookie, const char * buf, int size) {
+  (void)cookie; (void)buf; (void)size; // unused
+  return EACCES; // can't provide write access to the apk
+}
+
+static fpos_t android_seek(void * cookie, fpos_t offset, int whence) {
+  return AAsset_seek((AAsset*)cookie, offset, whence);
+}
+
+static int android_close(void * cookie) {
+  AAsset_close((AAsset*)cookie);
+  return 0;
+}
+
+AAssetManager * android_asset_manager = NULL;
+void nvgSetAndroidAssetManager(AAssetManager * manager) {
+  android_asset_manager = manager;
+}
+
+FILE * android_fopen(const char * fname, const char * mode) {
+  if (mode[0] == '/') { // absolute path
+  }
+
+  if (strchr(mode, 'w')) { // for writing
+    LOGE("Unable to open asset (trying to write): '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  if (!android_asset_manager) {
+    LOGE("Unable to open asset (unknown asset manager): '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  AAsset* asset = AAssetManager_open(android_asset_manager, fname, 0);
+  if (!asset) {
+    LOGW("Unable to open asset: '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  LOGV("Opening asset: '%s' ('%s')", fname, mode);
+  return funopen(asset, android_read, android_write, android_seek, android_close);
+}
+
+#endif
diff --git a/source/thirdparty/android.h b/source/thirdparty/android.h
new file mode 100644
index 0000000..0bf20ce
--- /dev/null
+++ b/source/thirdparty/android.h
@@ -0,0 +1,26 @@
+// See: http://www.50ply.com/blog/2013/01/19/loading-compressed-android-assets-with-file-pointer/
+
+#ifndef NANOVG_ANDROID_H_04F2956C_D65D_11EA_852A_07298A1173F1
+#define NANOVG_ANDROID_H_04F2956C_D65D_11EA_852A_07298A1173F1
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#if defined(__ANDROID__)
+
+#include <stdio.h>
+#include <android/asset_manager.h>
+
+void android_fopen_set_asset_manager(AAssetManager* manager);
+FILE* android_fopen(const char* fname, const char* mode);
+
+#define fopen(name, mode) android_fopen(name, mode)
+
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NANOVG_ANDROID_H_04F2956C_D65D_11EA_852A_07298A1173F1
diff --git a/source/thirdparty/fontstash.h b/source/thirdparty/fontstash.h
new file mode 100644
index 0000000..29d5caf
--- /dev/null
+++ b/source/thirdparty/fontstash.h
@@ -0,0 +1,1790 @@
+//
+// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#ifndef FONTSTASH_H_F380F1FA_CDA3_11EA_AF58_0FE5E5086B14
+#define FONTSTASH_H_F380F1FA_CDA3_11EA_AF58_0FE5E5086B14
+
+#define FONS_INVALID -1
+
+enum FONSflags {
+	FONS_ZERO_TOPLEFT = 1,
+	FONS_ZERO_BOTTOMLEFT = 2,
+};
+
+enum FONSalign {
+	// Horizontal align
+	FONS_ALIGN_LEFT 	= 1<<0,	// Default
+	FONS_ALIGN_CENTER 	= 1<<1,
+	FONS_ALIGN_RIGHT 	= 1<<2,
+	// Vertical align
+	FONS_ALIGN_TOP 		= 1<<3,
+	FONS_ALIGN_MIDDLE	= 1<<4,
+	FONS_ALIGN_BOTTOM	= 1<<5,
+	FONS_ALIGN_BASELINE	= 1<<6, // Default
+};
+
+enum FONSglyphBitmap {
+	FONS_GLYPH_BITMAP_OPTIONAL = 1,
+	FONS_GLYPH_BITMAP_REQUIRED = 2,
+};
+
+enum FONSerrorCode {
+	// Font atlas is full.
+	FONS_ATLAS_FULL = 1,
+	// Scratch memory used to render glyphs is full, requested size reported in 'val', you may need to bump up FONS_SCRATCH_BUF_SIZE.
+	FONS_SCRATCH_FULL = 2,
+	// Calls to fonsPushState has created too large stack, if you need deep state stack bump up FONS_MAX_STATES.
+	FONS_STATES_OVERFLOW = 3,
+	// Trying to pop too many states fonsPopState().
+	FONS_STATES_UNDERFLOW = 4,
+};
+
+struct FONSparams {
+	int width, height;
+	unsigned char flags;
+	void* userPtr;
+	int (*renderCreate)(void* uptr, int width, int height);
+	int (*renderResize)(void* uptr, int width, int height);
+	void (*renderUpdate)(void* uptr, int* rect, const unsigned char* data);
+	void (*renderDraw)(void* uptr, const float* verts, const float* tcoords, const unsigned int* colors, int nverts);
+	void (*renderDelete)(void* uptr);
+};
+typedef struct FONSparams FONSparams;
+
+struct FONSquad
+{
+	float x0,y0,s0,t0;
+	float x1,y1,s1,t1;
+};
+typedef struct FONSquad FONSquad;
+
+struct FONStextIter {
+	float x, y, nextx, nexty, scale, spacing;
+	unsigned int codepoint;
+	short isize, iblur;
+	struct FONSfont* font;
+	int prevGlyphIndex;
+	const char* str;
+	const char* next;
+	const char* end;
+	unsigned int utf8state;
+	int bitmapOption;
+};
+typedef struct FONStextIter FONStextIter;
+
+typedef struct FONScontext FONScontext;
+
+// Constructor and destructor.
+FONScontext* fonsCreateInternal(FONSparams* params);
+void fonsDeleteInternal(FONScontext* s);
+
+void fonsSetErrorCallback(FONScontext* s, void (*callback)(void* uptr, int error, int val), void* uptr);
+// Returns current atlas size.
+void fonsGetAtlasSize(FONScontext* s, int* width, int* height);
+// Expands the atlas size.
+int fonsExpandAtlas(FONScontext* s, int width, int height);
+// Resets the whole stash.
+int fonsResetAtlas(FONScontext* stash, int width, int height);
+
+// Add fonts
+int fonsAddFont(FONScontext* s, const char* name, const char* path, int fontIndex);
+int fonsAddFontMem(FONScontext* s, const char* name, unsigned char* data, int ndata, int freeData, int fontIndex);
+int fonsGetFontByName(FONScontext* s, const char* name);
+
+// State handling
+void fonsPushState(FONScontext* s);
+void fonsPopState(FONScontext* s);
+void fonsClearState(FONScontext* s);
+
+// State setting
+void fonsSetSize(FONScontext* s, float size);
+void fonsSetColor(FONScontext* s, unsigned int color);
+void fonsSetSpacing(FONScontext* s, float spacing);
+void fonsSetBlur(FONScontext* s, float blur);
+void fonsSetAlign(FONScontext* s, int align);
+void fonsSetFont(FONScontext* s, int font);
+
+// Draw text
+float fonsDrawText(FONScontext* s, float x, float y, const char* string, const char* end);
+
+// Measure text
+float fonsTextBounds(FONScontext* s, float x, float y, const char* string, const char* end, float* bounds);
+void fonsLineBounds(FONScontext* s, float y, float* miny, float* maxy);
+void fonsVertMetrics(FONScontext* s, float* ascender, float* descender, float* lineh);
+
+// Text iterator
+int fonsTextIterInit(FONScontext* stash, FONStextIter* iter, float x, float y, const char* str, const char* end, int bitmapOption);
+int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, struct FONSquad* quad);
+
+// Pull texture changes
+const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height);
+int fonsValidateTexture(FONScontext* s, int* dirty);
+
+// Draws the stash texture for debugging
+void fonsDrawDebug(FONScontext* s, float x, float y);
+
+#endif // FONTSTASH_H_F380F1FA_CDA3_11EA_AF58_0FE5E5086B14
+
+
+#ifdef FONTSTASH_IMPLEMENTATION
+
+#define FONS_NOTUSED(v)  (void)sizeof(v)
+
+#ifdef FONS_USE_FREETYPE
+
+#include <ft2build.h>
+#include FT_FREETYPE_H
+#include FT_ADVANCES_H
+#include <math.h>
+
+struct FONSttFontImpl {
+	FT_Face font;
+};
+typedef struct FONSttFontImpl FONSttFontImpl;
+
+#else
+
+#define STB_TRUETYPE_IMPLEMENTATION
+static void* fons__tmpalloc(size_t size, void* up);
+static void fons__tmpfree(void* ptr, void* up);
+#define STBTT_malloc(x,u)    fons__tmpalloc(x,u)
+#define STBTT_free(x,u)      fons__tmpfree(x,u)
+#include "../stb/stb_truetype.h"
+
+struct FONSttFontImpl {
+	stbtt_fontinfo font;
+};
+typedef struct FONSttFontImpl FONSttFontImpl;
+
+#endif
+
+#ifndef FONS_SCRATCH_BUF_SIZE
+#	define FONS_SCRATCH_BUF_SIZE 96000
+#endif
+#ifndef FONS_HASH_LUT_SIZE
+#	define FONS_HASH_LUT_SIZE 256
+#endif
+#ifndef FONS_INIT_FONTS
+#	define FONS_INIT_FONTS 4
+#endif
+#ifndef FONS_INIT_GLYPHS
+#	define FONS_INIT_GLYPHS 256
+#endif
+#ifndef FONS_INIT_ATLAS_NODES
+#	define FONS_INIT_ATLAS_NODES 256
+#endif
+#ifndef FONS_VERTEX_COUNT
+#	define FONS_VERTEX_COUNT 1024
+#endif
+#ifndef FONS_MAX_STATES
+#	define FONS_MAX_STATES 20
+#endif
+#ifndef FONS_MAX_FALLBACKS
+#	define FONS_MAX_FALLBACKS 20
+#endif
+
+static unsigned int fons__hashint(unsigned int a)
+{
+	a += ~(a<<15);
+	a ^=  (a>>10);
+	a +=  (a<<3);
+	a ^=  (a>>6);
+	a += ~(a<<11);
+	a ^=  (a>>16);
+	return a;
+}
+
+static int fons__mini(int a, int b)
+{
+	return a < b ? a : b;
+}
+
+static int fons__maxi(int a, int b)
+{
+	return a > b ? a : b;
+}
+
+struct FONSglyph
+{
+	unsigned int codepoint;
+	int index;
+	int next;
+	short size, blur;
+	short x0,y0,x1,y1;
+	short xadv,xoff,yoff;
+};
+typedef struct FONSglyph FONSglyph;
+
+struct FONSfont
+{
+	FONSttFontImpl font;
+	char name[64];
+	unsigned char* data;
+	int dataSize;
+	unsigned char freeData;
+	float ascender;
+	float descender;
+	float lineh;
+	FONSglyph* glyphs;
+	int cglyphs;
+	int nglyphs;
+	int lut[FONS_HASH_LUT_SIZE];
+	int fallbacks[FONS_MAX_FALLBACKS];
+	int nfallbacks;
+};
+typedef struct FONSfont FONSfont;
+
+struct FONSstate
+{
+	int font;
+	int align;
+	float size;
+	unsigned int color;
+	float blur;
+	float spacing;
+};
+typedef struct FONSstate FONSstate;
+
+struct FONSatlasNode {
+    short x, y, width;
+};
+typedef struct FONSatlasNode FONSatlasNode;
+
+struct FONSatlas
+{
+	int width, height;
+	FONSatlasNode* nodes;
+	int nnodes;
+	int cnodes;
+};
+typedef struct FONSatlas FONSatlas;
+
+struct FONScontext
+{
+	FONSparams params;
+	float itw,ith;
+	unsigned char* texData;
+	int dirtyRect[4];
+	FONSfont** fonts;
+	FONSatlas* atlas;
+	int cfonts;
+	int nfonts;
+	float verts[FONS_VERTEX_COUNT*2];
+	float tcoords[FONS_VERTEX_COUNT*2];
+	unsigned int colors[FONS_VERTEX_COUNT];
+	int nverts;
+	unsigned char* scratch;
+	int nscratch;
+	FONSstate states[FONS_MAX_STATES];
+	int nstates;
+	void (*handleError)(void* uptr, int error, int val);
+	void* errorUptr;
+#ifdef FONS_USE_FREETYPE
+	FT_Library ftLibrary;
+#endif
+};
+
+#ifdef FONS_USE_FREETYPE
+
+int fons__tt_init(FONScontext *context)
+{
+	FT_Error ftError;
+	FONS_NOTUSED(context);
+	ftError = FT_Init_FreeType(&context->ftLibrary);
+	return ftError == 0;
+}
+
+int fons__tt_done(FONScontext *context)
+{
+	FT_Error ftError;
+	FONS_NOTUSED(context);
+	ftError = FT_Done_FreeType(context->ftLibrary);
+	return ftError == 0;
+}
+
+int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize, int fontIndex)
+{
+	FT_Error ftError;
+	FONS_NOTUSED(context);
+
+	ftError = FT_New_Memory_Face(context->ftLibrary, (const FT_Byte*)data, dataSize, fontIndex, &font->font);
+	return ftError == 0;
+}
+
+void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
+{
+	*ascent = font->font->ascender;
+	*descent = font->font->descender;
+	*lineGap = font->font->height - (*ascent - *descent);
+}
+
+float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
+{
+	return size / font->font->units_per_EM;
+}
+
+int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
+{
+	return FT_Get_Char_Index(font->font, codepoint);
+}
+
+int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
+							  int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
+{
+	FT_Error ftError;
+	FT_GlyphSlot ftGlyph;
+	FT_Fixed advFixed;
+	FONS_NOTUSED(scale);
+
+	ftError = FT_Set_Pixel_Sizes(font->font, 0, size);
+	if (ftError) return 0;
+	ftError = FT_Load_Glyph(font->font, glyph, FT_LOAD_RENDER | FT_LOAD_FORCE_AUTOHINT | FT_LOAD_TARGET_LIGHT);
+	if (ftError) return 0;
+	ftError = FT_Get_Advance(font->font, glyph, FT_LOAD_NO_SCALE, &advFixed);
+	if (ftError) return 0;
+	ftGlyph = font->font->glyph;
+	*advance = (int)advFixed;
+	*lsb = (int)ftGlyph->metrics.horiBearingX;
+	*x0 = ftGlyph->bitmap_left;
+	*x1 = *x0 + ftGlyph->bitmap.width;
+	*y0 = -ftGlyph->bitmap_top;
+	*y1 = *y0 + ftGlyph->bitmap.rows;
+	return 1;
+}
+
+void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
+								float scaleX, float scaleY, int glyph)
+{
+	FT_GlyphSlot ftGlyph = font->font->glyph;
+	int ftGlyphOffset = 0;
+	unsigned int x, y;
+	FONS_NOTUSED(outWidth);
+	FONS_NOTUSED(outHeight);
+	FONS_NOTUSED(scaleX);
+	FONS_NOTUSED(scaleY);
+	FONS_NOTUSED(glyph);	// glyph has already been loaded by fons__tt_buildGlyphBitmap
+
+	for ( y = 0; y < ftGlyph->bitmap.rows; y++ ) {
+		for ( x = 0; x < ftGlyph->bitmap.width; x++ ) {
+			output[(y * outStride) + x] = ftGlyph->bitmap.buffer[ftGlyphOffset++];
+		}
+	}
+}
+
+int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
+{
+	FT_Vector ftKerning;
+	FT_Get_Kerning(font->font, glyph1, glyph2, FT_KERNING_DEFAULT, &ftKerning);
+	return (int)((ftKerning.x + 32) >> 6);  // Round up and convert to integer
+}
+
+#else
+
+int fons__tt_init(FONScontext *context)
+{
+	FONS_NOTUSED(context);
+	return 1;
+}
+
+int fons__tt_done(FONScontext *context)
+{
+	FONS_NOTUSED(context);
+	return 1;
+}
+
+int fons__tt_loadFont(FONScontext *context, FONSttFontImpl *font, unsigned char *data, int dataSize, int fontIndex)
+{
+	int offset, stbError;
+	FONS_NOTUSED(dataSize);
+
+	font->font.userdata = context;
+	offset = stbtt_GetFontOffsetForIndex(data, fontIndex);
+	if (offset == -1) {
+		stbError = 0;
+	} else {
+		stbError = stbtt_InitFont(&font->font, data, offset);
+	}
+	return stbError;
+}
+
+void fons__tt_getFontVMetrics(FONSttFontImpl *font, int *ascent, int *descent, int *lineGap)
+{
+	stbtt_GetFontVMetrics(&font->font, ascent, descent, lineGap);
+}
+
+float fons__tt_getPixelHeightScale(FONSttFontImpl *font, float size)
+{
+	return stbtt_ScaleForMappingEmToPixels(&font->font, size);
+}
+
+int fons__tt_getGlyphIndex(FONSttFontImpl *font, int codepoint)
+{
+	return stbtt_FindGlyphIndex(&font->font, codepoint);
+}
+
+int fons__tt_buildGlyphBitmap(FONSttFontImpl *font, int glyph, float size, float scale,
+							  int *advance, int *lsb, int *x0, int *y0, int *x1, int *y1)
+{
+	FONS_NOTUSED(size);
+	stbtt_GetGlyphHMetrics(&font->font, glyph, advance, lsb);
+	stbtt_GetGlyphBitmapBox(&font->font, glyph, scale, scale, x0, y0, x1, y1);
+	return 1;
+}
+
+void fons__tt_renderGlyphBitmap(FONSttFontImpl *font, unsigned char *output, int outWidth, int outHeight, int outStride,
+								float scaleX, float scaleY, int glyph)
+{
+	stbtt_MakeGlyphBitmap(&font->font, output, outWidth, outHeight, outStride, scaleX, scaleY, glyph);
+}
+
+int fons__tt_getGlyphKernAdvance(FONSttFontImpl *font, int glyph1, int glyph2)
+{
+	return stbtt_GetGlyphKernAdvance(&font->font, glyph1, glyph2);
+}
+
+#endif
+
+#ifdef STB_TRUETYPE_IMPLEMENTATION
+
+static void* fons__tmpalloc(size_t size, void* up)
+{
+	unsigned char* ptr;
+	FONScontext* stash = (FONScontext*)up;
+
+	// 16-byte align the returned pointer
+	size = (size + 0xf) & ~0xf;
+
+	if (stash->nscratch+(int)size > FONS_SCRATCH_BUF_SIZE) {
+		if (stash->handleError)
+			stash->handleError(stash->errorUptr, FONS_SCRATCH_FULL, stash->nscratch+(int)size);
+		return NULL;
+	}
+	ptr = stash->scratch + stash->nscratch;
+	stash->nscratch += (int)size;
+	return ptr;
+}
+
+static void fons__tmpfree(void* ptr, void* up)
+{
+	(void)ptr;
+	(void)up;
+	// empty
+}
+
+#endif // STB_TRUETYPE_IMPLEMENTATION
+
+// Copyright (c) 2008-2010 Bjoern Hoehrmann <bjoern@hoehrmann.de>
+// See http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ for details.
+
+#define FONS_UTF8_ACCEPT 0
+#define FONS_UTF8_REJECT 12
+
+static unsigned int fons__decutf8(unsigned int* state, unsigned int* codep, unsigned int byte)
+{
+	static const unsigned char utf8d[] = {
+		// The first part of the table maps bytes to character classes that
+		// to reduce the size of the transition table and create bitmasks.
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,  0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,  9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
+		7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,  7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
+		8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2,  2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
+		10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
+
+		// The second part is a transition table that maps a combination
+		// of a state of the automaton and a character class to a state.
+		0,12,24,36,60,96,84,12,12,12,48,72, 12,12,12,12,12,12,12,12,12,12,12,12,
+		12, 0,12,12,12,12,12, 0,12, 0,12,12, 12,24,12,12,12,12,12,24,12,24,12,12,
+		12,12,12,12,12,12,12,24,12,12,12,12, 12,24,12,12,12,12,12,12,12,24,12,12,
+		12,12,12,12,12,12,12,36,12,36,12,12, 12,36,12,12,12,12,12,36,12,36,12,12,
+		12,36,12,12,12,12,12,12,12,12,12,12,
+    };
+
+	unsigned int type = utf8d[byte];
+
+    *codep = (*state != FONS_UTF8_ACCEPT) ?
+		(byte & 0x3fu) | (*codep << 6) :
+		(0xff >> type) & (byte);
+
+	*state = utf8d[256 + *state + type];
+	return *state;
+}
+
+// Atlas based on Skyline Bin Packer by Jukka Jylänki
+
+static void fons__deleteAtlas(FONSatlas* atlas)
+{
+	if (atlas == NULL) return;
+	if (atlas->nodes != NULL) free(atlas->nodes);
+	free(atlas);
+}
+
+static FONSatlas* fons__allocAtlas(int w, int h, int nnodes)
+{
+	FONSatlas* atlas = NULL;
+
+	// Allocate memory for the font stash.
+	atlas = (FONSatlas*)malloc(sizeof(FONSatlas));
+	if (atlas == NULL) goto error;
+	memset(atlas, 0, sizeof(FONSatlas));
+
+	atlas->width = w;
+	atlas->height = h;
+
+	// Allocate space for skyline nodes
+	atlas->nodes = (FONSatlasNode*)malloc(sizeof(FONSatlasNode) * nnodes);
+	if (atlas->nodes == NULL) goto error;
+	memset(atlas->nodes, 0, sizeof(FONSatlasNode) * nnodes);
+	atlas->nnodes = 0;
+	atlas->cnodes = nnodes;
+
+	// Init root node.
+	atlas->nodes[0].x = 0;
+	atlas->nodes[0].y = 0;
+	atlas->nodes[0].width = (short)w;
+	atlas->nnodes++;
+
+	return atlas;
+
+error:
+	if (atlas) fons__deleteAtlas(atlas);
+	return NULL;
+}
+
+static int fons__atlasInsertNode(FONSatlas* atlas, int idx, int x, int y, int w)
+{
+	int i;
+	// Insert node
+	if (atlas->nnodes+1 > atlas->cnodes) {
+		atlas->cnodes = atlas->cnodes == 0 ? 8 : atlas->cnodes * 2;
+		atlas->nodes = (FONSatlasNode*)realloc(atlas->nodes, sizeof(FONSatlasNode) * atlas->cnodes);
+		if (atlas->nodes == NULL)
+			return 0;
+	}
+	for (i = atlas->nnodes; i > idx; i--)
+		atlas->nodes[i] = atlas->nodes[i-1];
+	atlas->nodes[idx].x = (short)x;
+	atlas->nodes[idx].y = (short)y;
+	atlas->nodes[idx].width = (short)w;
+	atlas->nnodes++;
+
+	return 1;
+}
+
+static void fons__atlasRemoveNode(FONSatlas* atlas, int idx)
+{
+	int i;
+	if (atlas->nnodes == 0) return;
+	for (i = idx; i < atlas->nnodes-1; i++)
+		atlas->nodes[i] = atlas->nodes[i+1];
+	atlas->nnodes--;
+}
+
+static void fons__atlasExpand(FONSatlas* atlas, int w, int h)
+{
+	// Insert node for empty space
+	if (w > atlas->width)
+		fons__atlasInsertNode(atlas, atlas->nnodes, atlas->width, 0, w - atlas->width);
+	atlas->width = w;
+	atlas->height = h;
+}
+
+static void fons__atlasReset(FONSatlas* atlas, int w, int h)
+{
+	atlas->width = w;
+	atlas->height = h;
+	atlas->nnodes = 0;
+
+	// Init root node.
+	atlas->nodes[0].x = 0;
+	atlas->nodes[0].y = 0;
+	atlas->nodes[0].width = (short)w;
+	atlas->nnodes++;
+}
+
+static int fons__atlasAddSkylineLevel(FONSatlas* atlas, int idx, int x, int y, int w, int h)
+{
+	int i;
+
+	// Insert new node
+	if (fons__atlasInsertNode(atlas, idx, x, y+h, w) == 0)
+		return 0;
+
+	// Delete skyline segments that fall under the shadow of the new segment.
+	for (i = idx+1; i < atlas->nnodes; i++) {
+		if (atlas->nodes[i].x < atlas->nodes[i-1].x + atlas->nodes[i-1].width) {
+			int shrink = atlas->nodes[i-1].x + atlas->nodes[i-1].width - atlas->nodes[i].x;
+			atlas->nodes[i].x += (short)shrink;
+			atlas->nodes[i].width -= (short)shrink;
+			if (atlas->nodes[i].width <= 0) {
+				fons__atlasRemoveNode(atlas, i);
+				i--;
+			} else {
+				break;
+			}
+		} else {
+			break;
+		}
+	}
+
+	// Merge same height skyline segments that are next to each other.
+	for (i = 0; i < atlas->nnodes-1; i++) {
+		if (atlas->nodes[i].y == atlas->nodes[i+1].y) {
+			atlas->nodes[i].width += atlas->nodes[i+1].width;
+			fons__atlasRemoveNode(atlas, i+1);
+			i--;
+		}
+	}
+
+	return 1;
+}
+
+static int fons__atlasRectFits(FONSatlas* atlas, int i, int w, int h)
+{
+	// Checks if there is enough space at the location of skyline span 'i',
+	// and return the max height of all skyline spans under that at that location,
+	// (think tetris block being dropped at that position). Or -1 if no space found.
+	int x = atlas->nodes[i].x;
+	int y = atlas->nodes[i].y;
+	int spaceLeft;
+	if (x + w > atlas->width)
+		return -1;
+	spaceLeft = w;
+	while (spaceLeft > 0) {
+		if (i == atlas->nnodes) return -1;
+		y = fons__maxi(y, atlas->nodes[i].y);
+		if (y + h > atlas->height) return -1;
+		spaceLeft -= atlas->nodes[i].width;
+		++i;
+	}
+	return y;
+}
+
+static int fons__atlasAddRect(FONSatlas* atlas, int rw, int rh, int* rx, int* ry)
+{
+	int besth = atlas->height, bestw = atlas->width, besti = -1;
+	int bestx = -1, besty = -1, i;
+
+	// Bottom left fit heuristic.
+	for (i = 0; i < atlas->nnodes; i++) {
+		int y = fons__atlasRectFits(atlas, i, rw, rh);
+		if (y != -1) {
+			if (y + rh < besth || (y + rh == besth && atlas->nodes[i].width < bestw)) {
+				besti = i;
+				bestw = atlas->nodes[i].width;
+				besth = y + rh;
+				bestx = atlas->nodes[i].x;
+				besty = y;
+			}
+		}
+	}
+
+	if (besti == -1)
+		return 0;
+
+	// Perform the actual packing.
+	if (fons__atlasAddSkylineLevel(atlas, besti, bestx, besty, rw, rh) == 0)
+		return 0;
+
+	*rx = bestx;
+	*ry = besty;
+
+	return 1;
+}
+
+static void fons__addWhiteRect(FONScontext* stash, int w, int h)
+{
+	int x, y, gx, gy;
+	unsigned char* dst;
+	if (fons__atlasAddRect(stash->atlas, w, h, &gx, &gy) == 0)
+		return;
+
+	// Rasterize
+	dst = &stash->texData[gx + gy * stash->params.width];
+	for (y = 0; y < h; y++) {
+		for (x = 0; x < w; x++)
+			dst[x] = 0xff;
+		dst += stash->params.width;
+	}
+
+	stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], gx);
+	stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], gy);
+	stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], gx+w);
+	stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], gy+h);
+}
+
+FONScontext* fonsCreateInternal(FONSparams* params)
+{
+	FONScontext* stash = NULL;
+
+	// Allocate memory for the font stash.
+	stash = (FONScontext*)malloc(sizeof(FONScontext));
+	if (stash == NULL) goto error;
+	memset(stash, 0, sizeof(FONScontext));
+
+	stash->params = *params;
+
+	// Allocate scratch buffer.
+	stash->scratch = (unsigned char*)malloc(FONS_SCRATCH_BUF_SIZE);
+	if (stash->scratch == NULL) goto error;
+
+	// Initialize implementation library
+	if (!fons__tt_init(stash)) goto error;
+
+	if (stash->params.renderCreate != NULL) {
+		if (stash->params.renderCreate(stash->params.userPtr, stash->params.width, stash->params.height) == 0)
+			goto error;
+	}
+
+	stash->atlas = fons__allocAtlas(stash->params.width, stash->params.height, FONS_INIT_ATLAS_NODES);
+	if (stash->atlas == NULL) goto error;
+
+	// Allocate space for fonts.
+	stash->fonts = (FONSfont**)malloc(sizeof(FONSfont*) * FONS_INIT_FONTS);
+	if (stash->fonts == NULL) goto error;
+	memset(stash->fonts, 0, sizeof(FONSfont*) * FONS_INIT_FONTS);
+	stash->cfonts = FONS_INIT_FONTS;
+	stash->nfonts = 0;
+
+	// Create texture for the cache.
+	stash->itw = 1.0f/stash->params.width;
+	stash->ith = 1.0f/stash->params.height;
+	stash->texData = (unsigned char*)malloc(stash->params.width * stash->params.height);
+	if (stash->texData == NULL) goto error;
+	memset(stash->texData, 0, stash->params.width * stash->params.height);
+
+	stash->dirtyRect[0] = stash->params.width;
+	stash->dirtyRect[1] = stash->params.height;
+	stash->dirtyRect[2] = 0;
+	stash->dirtyRect[3] = 0;
+
+	// Add white rect at 0,0 for debug drawing.
+	fons__addWhiteRect(stash, 2,2);
+
+	fonsPushState(stash);
+	fonsClearState(stash);
+
+	return stash;
+
+error:
+	fonsDeleteInternal(stash);
+	return NULL;
+}
+
+static FONSstate* fons__getState(FONScontext* stash)
+{
+	return &stash->states[stash->nstates-1];
+}
+
+int fonsAddFallbackFont(FONScontext* stash, int base, int fallback)
+{
+	FONSfont* baseFont = stash->fonts[base];
+	if (baseFont->nfallbacks < FONS_MAX_FALLBACKS) {
+		baseFont->fallbacks[baseFont->nfallbacks++] = fallback;
+		return 1;
+	}
+	return 0;
+}
+
+void fonsResetFallbackFont(FONScontext* stash, int base)
+{
+	int i;
+
+	FONSfont* baseFont = stash->fonts[base];
+	baseFont->nfallbacks = 0;
+	baseFont->nglyphs = 0;
+	for (i = 0; i < FONS_HASH_LUT_SIZE; i++)
+		baseFont->lut[i] = -1;
+}
+
+void fonsSetSize(FONScontext* stash, float size)
+{
+	fons__getState(stash)->size = size;
+}
+
+void fonsSetColor(FONScontext* stash, unsigned int color)
+{
+	fons__getState(stash)->color = color;
+}
+
+void fonsSetSpacing(FONScontext* stash, float spacing)
+{
+	fons__getState(stash)->spacing = spacing;
+}
+
+void fonsSetBlur(FONScontext* stash, float blur)
+{
+	fons__getState(stash)->blur = blur;
+}
+
+void fonsSetAlign(FONScontext* stash, int align)
+{
+	fons__getState(stash)->align = align;
+}
+
+void fonsSetFont(FONScontext* stash, int font)
+{
+	fons__getState(stash)->font = font;
+}
+
+void fonsPushState(FONScontext* stash)
+{
+	if (stash->nstates >= FONS_MAX_STATES) {
+		if (stash->handleError)
+			stash->handleError(stash->errorUptr, FONS_STATES_OVERFLOW, 0);
+		return;
+	}
+	if (stash->nstates > 0)
+		memcpy(&stash->states[stash->nstates], &stash->states[stash->nstates-1], sizeof(FONSstate));
+	stash->nstates++;
+}
+
+void fonsPopState(FONScontext* stash)
+{
+	if (stash->nstates <= 1) {
+		if (stash->handleError)
+			stash->handleError(stash->errorUptr, FONS_STATES_UNDERFLOW, 0);
+		return;
+	}
+	stash->nstates--;
+}
+
+void fonsClearState(FONScontext* stash)
+{
+	FONSstate* state = fons__getState(stash);
+	state->size = 12.0f;
+	state->color = 0xffffffff;
+	state->font = 0;
+	state->blur = 0;
+	state->spacing = 0;
+	state->align = FONS_ALIGN_LEFT | FONS_ALIGN_BASELINE;
+}
+
+static void fons__freeFont(FONSfont* font)
+{
+	if (font == NULL) return;
+	if (font->glyphs) free(font->glyphs);
+	if (font->freeData && font->data) free(font->data);
+	free(font);
+}
+
+static int fons__allocFont(FONScontext* stash)
+{
+	FONSfont* font = NULL;
+	if (stash->nfonts+1 > stash->cfonts) {
+		stash->cfonts = stash->cfonts == 0 ? 8 : stash->cfonts * 2;
+		stash->fonts = (FONSfont**)realloc(stash->fonts, sizeof(FONSfont*) * stash->cfonts);
+		if (stash->fonts == NULL)
+			return -1;
+	}
+	font = (FONSfont*)malloc(sizeof(FONSfont));
+	if (font == NULL) goto error;
+	memset(font, 0, sizeof(FONSfont));
+
+	font->glyphs = (FONSglyph*)malloc(sizeof(FONSglyph) * FONS_INIT_GLYPHS);
+	if (font->glyphs == NULL) goto error;
+	font->cglyphs = FONS_INIT_GLYPHS;
+	font->nglyphs = 0;
+
+	stash->fonts[stash->nfonts++] = font;
+	return stash->nfonts-1;
+
+error:
+	fons__freeFont(font);
+
+	return FONS_INVALID;
+}
+
+int fonsAddFont(FONScontext* stash, const char* name, const char* path, int fontIndex)
+{
+	FILE* fp = 0;
+	int dataSize = 0;
+	size_t readed;
+	unsigned char* data = NULL;
+
+	// Read in the font data.
+	fp = fopen(path, "rb");
+	if (fp == NULL) goto error;
+	fseek(fp,0,SEEK_END);
+	dataSize = (int)ftell(fp);
+	fseek(fp,0,SEEK_SET);
+	data = (unsigned char*)malloc(dataSize);
+	if (data == NULL) goto error;
+	readed = fread(data, 1, dataSize, fp);
+	fclose(fp);
+	fp = 0;
+	if (readed != (size_t)dataSize) goto error;
+
+	return fonsAddFontMem(stash, name, data, dataSize, 1, fontIndex);
+
+error:
+	if (data) free(data);
+	if (fp) fclose(fp);
+	return FONS_INVALID;
+}
+
+int fonsAddFontMem(FONScontext* stash, const char* name, unsigned char* data, int dataSize, int freeData, int fontIndex)
+{
+	int i, ascent, descent, fh, lineGap;
+	FONSfont* font;
+
+	int idx = fons__allocFont(stash);
+	if (idx == FONS_INVALID)
+		return FONS_INVALID;
+
+	font = stash->fonts[idx];
+
+	strncpy(font->name, name, sizeof(font->name));
+	font->name[sizeof(font->name)-1] = '\0';
+
+	// Init hash lookup.
+	for (i = 0; i < FONS_HASH_LUT_SIZE; ++i)
+		font->lut[i] = -1;
+
+	// Read in the font data.
+	font->dataSize = dataSize;
+	font->data = data;
+	font->freeData = (unsigned char)freeData;
+
+	// Init font
+	stash->nscratch = 0;
+	if (!fons__tt_loadFont(stash, &font->font, data, dataSize, fontIndex)) goto error;
+
+	// Store normalized line height. The real line height is got
+	// by multiplying the lineh by font size.
+	fons__tt_getFontVMetrics( &font->font, &ascent, &descent, &lineGap);
+	ascent += lineGap;
+	fh = ascent - descent;
+	font->ascender = (float)ascent / (float)fh;
+	font->descender = (float)descent / (float)fh;
+	font->lineh = font->ascender - font->descender;
+
+	return idx;
+
+error:
+	fons__freeFont(font);
+	stash->nfonts--;
+	return FONS_INVALID;
+}
+
+int fonsGetFontByName(FONScontext* s, const char* name)
+{
+	int i;
+	for (i = 0; i < s->nfonts; i++) {
+		if (strcmp(s->fonts[i]->name, name) == 0)
+			return i;
+	}
+	return FONS_INVALID;
+}
+
+
+static FONSglyph* fons__allocGlyph(FONSfont* font)
+{
+	if (font->nglyphs+1 > font->cglyphs) {
+		font->cglyphs = font->cglyphs == 0 ? 8 : font->cglyphs * 2;
+		font->glyphs = (FONSglyph*)realloc(font->glyphs, sizeof(FONSglyph) * font->cglyphs);
+		if (font->glyphs == NULL) return NULL;
+	}
+	font->nglyphs++;
+	return &font->glyphs[font->nglyphs-1];
+}
+
+
+// Based on Exponential blur, Jani Huhtanen, 2006
+
+#define APREC 16
+#define ZPREC 7
+
+static void fons__blurCols(unsigned char* dst, int w, int h, int dstStride, int alpha)
+{
+	int x, y;
+	for (y = 0; y < h; y++) {
+		int z = 0; // force zero border
+		for (x = 1; x < w; x++) {
+			z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
+			dst[x] = (unsigned char)(z >> ZPREC);
+		}
+		dst[w-1] = 0; // force zero border
+		z = 0;
+		for (x = w-2; x >= 0; x--) {
+			z += (alpha * (((int)(dst[x]) << ZPREC) - z)) >> APREC;
+			dst[x] = (unsigned char)(z >> ZPREC);
+		}
+		dst[0] = 0; // force zero border
+		dst += dstStride;
+	}
+}
+
+static void fons__blurRows(unsigned char* dst, int w, int h, int dstStride, int alpha)
+{
+	int x, y;
+	for (x = 0; x < w; x++) {
+		int z = 0; // force zero border
+		for (y = dstStride; y < h*dstStride; y += dstStride) {
+			z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
+			dst[y] = (unsigned char)(z >> ZPREC);
+		}
+		dst[(h-1)*dstStride] = 0; // force zero border
+		z = 0;
+		for (y = (h-2)*dstStride; y >= 0; y -= dstStride) {
+			z += (alpha * (((int)(dst[y]) << ZPREC) - z)) >> APREC;
+			dst[y] = (unsigned char)(z >> ZPREC);
+		}
+		dst[0] = 0; // force zero border
+		dst++;
+	}
+}
+
+
+static void fons__blur(FONScontext* stash, unsigned char* dst, int w, int h, int dstStride, int blur)
+{
+	int alpha;
+	float sigma;
+	(void)stash;
+
+	if (blur < 1)
+		return;
+	// Calculate the alpha such that 90% of the kernel is within the radius. (Kernel extends to infinity)
+	sigma = (float)blur * 0.57735f; // 1 / sqrt(3)
+	alpha = (int)((1<<APREC) * (1.0f - expf(-2.3f / (sigma+1.0f))));
+	fons__blurRows(dst, w, h, dstStride, alpha);
+	fons__blurCols(dst, w, h, dstStride, alpha);
+	fons__blurRows(dst, w, h, dstStride, alpha);
+	fons__blurCols(dst, w, h, dstStride, alpha);
+//	fons__blurrows(dst, w, h, dstStride, alpha);
+//	fons__blurcols(dst, w, h, dstStride, alpha);
+}
+
+static FONSglyph* fons__getGlyph(FONScontext* stash, FONSfont* font, unsigned int codepoint,
+								 short isize, short iblur, int bitmapOption)
+{
+	int i, g, advance, lsb, x0, y0, x1, y1, gw, gh, gx, gy, x, y;
+	float scale;
+	FONSglyph* glyph = NULL;
+	unsigned int h;
+	float size = isize/10.0f;
+	int pad, added;
+	unsigned char* bdst;
+	unsigned char* dst;
+	FONSfont* renderFont = font;
+
+	if (isize < 2) return NULL;
+	if (iblur > 20) iblur = 20;
+	pad = iblur+2;
+
+	// Reset allocator.
+	stash->nscratch = 0;
+
+	// Find code point and size.
+	h = fons__hashint(codepoint) & (FONS_HASH_LUT_SIZE-1);
+	i = font->lut[h];
+	while (i != -1) {
+		if (font->glyphs[i].codepoint == codepoint && font->glyphs[i].size == isize && font->glyphs[i].blur == iblur) {
+			glyph = &font->glyphs[i];
+			if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL || (glyph->x0 >= 0 && glyph->y0 >= 0)) {
+			  return glyph;
+			}
+			// At this point, glyph exists but the bitmap data is not yet created.
+			break;
+		}
+		i = font->glyphs[i].next;
+	}
+
+	// Create a new glyph or rasterize bitmap data for a cached glyph.
+	g = fons__tt_getGlyphIndex(&font->font, codepoint);
+	// Try to find the glyph in fallback fonts.
+	if (g == 0) {
+		for (i = 0; i < font->nfallbacks; ++i) {
+			FONSfont* fallbackFont = stash->fonts[font->fallbacks[i]];
+			int fallbackIndex = fons__tt_getGlyphIndex(&fallbackFont->font, codepoint);
+			if (fallbackIndex != 0) {
+				g = fallbackIndex;
+				renderFont = fallbackFont;
+				break;
+			}
+		}
+		// It is possible that we did not find a fallback glyph.
+		// In that case the glyph index 'g' is 0, and we'll proceed below and cache empty glyph.
+	}
+	scale = fons__tt_getPixelHeightScale(&renderFont->font, size);
+	fons__tt_buildGlyphBitmap(&renderFont->font, g, size, scale, &advance, &lsb, &x0, &y0, &x1, &y1);
+	gw = x1-x0 + pad*2;
+	gh = y1-y0 + pad*2;
+
+	// Determines the spot to draw glyph in the atlas.
+	if (bitmapOption == FONS_GLYPH_BITMAP_REQUIRED) {
+		// Find free spot for the rect in the atlas
+		added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
+		if (added == 0 && stash->handleError != NULL) {
+			// Atlas is full, let the user to resize the atlas (or not), and try again.
+			stash->handleError(stash->errorUptr, FONS_ATLAS_FULL, 0);
+			added = fons__atlasAddRect(stash->atlas, gw, gh, &gx, &gy);
+		}
+		if (added == 0) return NULL;
+	} else {
+		// Negative coordinate indicates there is no bitmap data created.
+		gx = -1;
+		gy = -1;
+	}
+
+	// Init glyph.
+	if (glyph == NULL) {
+		glyph = fons__allocGlyph(font);
+		glyph->codepoint = codepoint;
+		glyph->size = isize;
+		glyph->blur = iblur;
+		glyph->next = 0;
+
+		// Insert char to hash lookup.
+		glyph->next = font->lut[h];
+		font->lut[h] = font->nglyphs-1;
+	}
+	glyph->index = g;
+	glyph->x0 = (short)gx;
+	glyph->y0 = (short)gy;
+	glyph->x1 = (short)(glyph->x0+gw);
+	glyph->y1 = (short)(glyph->y0+gh);
+	glyph->xadv = (short)(scale * advance * 10.0f);
+	glyph->xoff = (short)(x0 - pad);
+	glyph->yoff = (short)(y0 - pad);
+
+	if (bitmapOption == FONS_GLYPH_BITMAP_OPTIONAL) {
+		return glyph;
+	}
+
+	// Rasterize
+	dst = &stash->texData[(glyph->x0+pad) + (glyph->y0+pad) * stash->params.width];
+	fons__tt_renderGlyphBitmap(&renderFont->font, dst, gw-pad*2,gh-pad*2, stash->params.width, scale, scale, g);
+
+	// Make sure there is one pixel empty border.
+	dst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
+	for (y = 0; y < gh; y++) {
+		dst[y*stash->params.width] = 0;
+		dst[gw-1 + y*stash->params.width] = 0;
+	}
+	for (x = 0; x < gw; x++) {
+		dst[x] = 0;
+		dst[x + (gh-1)*stash->params.width] = 0;
+	}
+
+	// Debug code to color the glyph background
+/*	unsigned char* fdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
+	for (y = 0; y < gh; y++) {
+		for (x = 0; x < gw; x++) {
+			int a = (int)fdst[x+y*stash->params.width] + 20;
+			if (a > 255) a = 255;
+			fdst[x+y*stash->params.width] = a;
+		}
+	}*/
+
+	// Blur
+	if (iblur > 0) {
+		stash->nscratch = 0;
+		bdst = &stash->texData[glyph->x0 + glyph->y0 * stash->params.width];
+		fons__blur(stash, bdst, gw, gh, stash->params.width, iblur);
+	}
+
+	stash->dirtyRect[0] = fons__mini(stash->dirtyRect[0], glyph->x0);
+	stash->dirtyRect[1] = fons__mini(stash->dirtyRect[1], glyph->y0);
+	stash->dirtyRect[2] = fons__maxi(stash->dirtyRect[2], glyph->x1);
+	stash->dirtyRect[3] = fons__maxi(stash->dirtyRect[3], glyph->y1);
+
+	return glyph;
+}
+
+static void fons__getQuad(FONScontext* stash, FONSfont* font,
+						   int prevGlyphIndex, FONSglyph* glyph,
+						   float scale, float spacing, float* x, float* y, FONSquad* q)
+{
+	float rx,ry,xoff,yoff,x0,y0,x1,y1;
+
+	if (prevGlyphIndex != -1) {
+		float adv = fons__tt_getGlyphKernAdvance(&font->font, prevGlyphIndex, glyph->index) * scale;
+		*x += (int)(adv + spacing + 0.5f);
+	}
+
+	// Each glyph has 2px border to allow good interpolation,
+	// one pixel to prevent leaking, and one to allow good interpolation for rendering.
+	// Inset the texture region by one pixel for correct interpolation.
+	xoff = (short)(glyph->xoff+1);
+	yoff = (short)(glyph->yoff+1);
+	x0 = (float)(glyph->x0+1);
+	y0 = (float)(glyph->y0+1);
+	x1 = (float)(glyph->x1-1);
+	y1 = (float)(glyph->y1-1);
+
+	if (stash->params.flags & FONS_ZERO_TOPLEFT) {
+		rx = floorf(*x + xoff);
+		ry = floorf(*y + yoff);
+
+		q->x0 = rx;
+		q->y0 = ry;
+		q->x1 = rx + x1 - x0;
+		q->y1 = ry + y1 - y0;
+
+		q->s0 = x0 * stash->itw;
+		q->t0 = y0 * stash->ith;
+		q->s1 = x1 * stash->itw;
+		q->t1 = y1 * stash->ith;
+	} else {
+		rx = floorf(*x + xoff);
+		ry = floorf(*y - yoff);
+
+		q->x0 = rx;
+		q->y0 = ry;
+		q->x1 = rx + x1 - x0;
+		q->y1 = ry - y1 + y0;
+
+		q->s0 = x0 * stash->itw;
+		q->t0 = y0 * stash->ith;
+		q->s1 = x1 * stash->itw;
+		q->t1 = y1 * stash->ith;
+	}
+
+	*x += (int)(glyph->xadv / 10.0f + 0.5f);
+}
+
+static void fons__flush(FONScontext* stash)
+{
+	// Flush texture
+	if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
+		if (stash->params.renderUpdate != NULL)
+			stash->params.renderUpdate(stash->params.userPtr, stash->dirtyRect, stash->texData);
+		// Reset dirty rect
+		stash->dirtyRect[0] = stash->params.width;
+		stash->dirtyRect[1] = stash->params.height;
+		stash->dirtyRect[2] = 0;
+		stash->dirtyRect[3] = 0;
+	}
+
+	// Flush triangles
+	if (stash->nverts > 0) {
+		if (stash->params.renderDraw != NULL)
+			stash->params.renderDraw(stash->params.userPtr, stash->verts, stash->tcoords, stash->colors, stash->nverts);
+		stash->nverts = 0;
+	}
+}
+
+static __inline void fons__vertex(FONScontext* stash, float x, float y, float s, float t, unsigned int c)
+{
+	stash->verts[stash->nverts*2+0] = x;
+	stash->verts[stash->nverts*2+1] = y;
+	stash->tcoords[stash->nverts*2+0] = s;
+	stash->tcoords[stash->nverts*2+1] = t;
+	stash->colors[stash->nverts] = c;
+	stash->nverts++;
+}
+
+static float fons__getVertAlign(FONScontext* stash, FONSfont* font, int align, short isize)
+{
+	if (stash->params.flags & FONS_ZERO_TOPLEFT) {
+		if (align & FONS_ALIGN_TOP) {
+			return font->ascender * (float)isize/10.0f;
+		} else if (align & FONS_ALIGN_MIDDLE) {
+			return (font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
+		} else if (align & FONS_ALIGN_BASELINE) {
+			return 0.0f;
+		} else if (align & FONS_ALIGN_BOTTOM) {
+			return font->descender * (float)isize/10.0f;
+		}
+	} else {
+		if (align & FONS_ALIGN_TOP) {
+			return -font->ascender * (float)isize/10.0f;
+		} else if (align & FONS_ALIGN_MIDDLE) {
+			return -(font->ascender + font->descender) / 2.0f * (float)isize/10.0f;
+		} else if (align & FONS_ALIGN_BASELINE) {
+			return 0.0f;
+		} else if (align & FONS_ALIGN_BOTTOM) {
+			return -font->descender * (float)isize/10.0f;
+		}
+	}
+	return 0.0;
+}
+
+float fonsDrawText(FONScontext* stash,
+				   float x, float y,
+				   const char* str, const char* end)
+{
+	FONSstate* state = fons__getState(stash);
+	unsigned int codepoint;
+	unsigned int utf8state = 0;
+	FONSglyph* glyph = NULL;
+	FONSquad q;
+	int prevGlyphIndex = -1;
+	short isize = (short)(state->size*10.0f);
+	short iblur = (short)state->blur;
+	float scale;
+	FONSfont* font;
+	float width;
+
+	if (stash == NULL) return x;
+	if (state->font < 0 || state->font >= stash->nfonts) return x;
+	font = stash->fonts[state->font];
+	if (font->data == NULL) return x;
+
+	scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
+
+	if (end == NULL)
+		end = str + strlen(str);
+
+	// Align horizontally
+	if (state->align & FONS_ALIGN_LEFT) {
+		// empty
+	} else if (state->align & FONS_ALIGN_RIGHT) {
+		width = fonsTextBounds(stash, x,y, str, end, NULL);
+		x -= width;
+	} else if (state->align & FONS_ALIGN_CENTER) {
+		width = fonsTextBounds(stash, x,y, str, end, NULL);
+		x -= width * 0.5f;
+	}
+	// Align vertically.
+	y += fons__getVertAlign(stash, font, state->align, isize);
+
+	for (; str != end; ++str) {
+		if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
+			continue;
+		glyph = fons__getGlyph(stash, font, codepoint, isize, iblur, FONS_GLYPH_BITMAP_REQUIRED);
+		if (glyph != NULL) {
+			fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
+
+			if (stash->nverts+6 > FONS_VERTEX_COUNT)
+				fons__flush(stash);
+
+			fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
+			fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
+			fons__vertex(stash, q.x1, q.y0, q.s1, q.t0, state->color);
+
+			fons__vertex(stash, q.x0, q.y0, q.s0, q.t0, state->color);
+			fons__vertex(stash, q.x0, q.y1, q.s0, q.t1, state->color);
+			fons__vertex(stash, q.x1, q.y1, q.s1, q.t1, state->color);
+		}
+		prevGlyphIndex = glyph != NULL ? glyph->index : -1;
+	}
+	fons__flush(stash);
+
+	return x;
+}
+
+int fonsTextIterInit(FONScontext* stash, FONStextIter* iter,
+					 float x, float y, const char* str, const char* end, int bitmapOption)
+{
+	FONSstate* state = fons__getState(stash);
+	float width;
+
+	memset(iter, 0, sizeof(*iter));
+
+	if (stash == NULL) return 0;
+	if (state->font < 0 || state->font >= stash->nfonts) return 0;
+	iter->font = stash->fonts[state->font];
+	if (iter->font->data == NULL) return 0;
+
+	iter->isize = (short)(state->size*10.0f);
+	iter->iblur = (short)state->blur;
+	iter->scale = fons__tt_getPixelHeightScale(&iter->font->font, (float)iter->isize/10.0f);
+
+	// Align horizontally
+	if (state->align & FONS_ALIGN_LEFT) {
+		// empty
+	} else if (state->align & FONS_ALIGN_RIGHT) {
+		width = fonsTextBounds(stash, x,y, str, end, NULL);
+		x -= width;
+	} else if (state->align & FONS_ALIGN_CENTER) {
+		width = fonsTextBounds(stash, x,y, str, end, NULL);
+		x -= width * 0.5f;
+	}
+	// Align vertically.
+	y += fons__getVertAlign(stash, iter->font, state->align, iter->isize);
+
+	if (end == NULL)
+		end = str + strlen(str);
+
+	iter->x = iter->nextx = x;
+	iter->y = iter->nexty = y;
+	iter->spacing = state->spacing;
+	iter->str = str;
+	iter->next = str;
+	iter->end = end;
+	iter->codepoint = 0;
+	iter->prevGlyphIndex = -1;
+	iter->bitmapOption = bitmapOption;
+
+	return 1;
+}
+
+int fonsTextIterNext(FONScontext* stash, FONStextIter* iter, FONSquad* quad)
+{
+	FONSglyph* glyph = NULL;
+	const char* str = iter->next;
+	iter->str = iter->next;
+
+	if (str == iter->end)
+		return 0;
+
+	for (; str != iter->end; str++) {
+		if (fons__decutf8(&iter->utf8state, &iter->codepoint, *(const unsigned char*)str))
+			continue;
+		str++;
+		// Get glyph and quad
+		iter->x = iter->nextx;
+		iter->y = iter->nexty;
+		glyph = fons__getGlyph(stash, iter->font, iter->codepoint, iter->isize, iter->iblur, iter->bitmapOption);
+		// If the iterator was initialized with FONS_GLYPH_BITMAP_OPTIONAL, then the UV coordinates of the quad will be invalid.
+		if (glyph != NULL)
+			fons__getQuad(stash, iter->font, iter->prevGlyphIndex, glyph, iter->scale, iter->spacing, &iter->nextx, &iter->nexty, quad);
+		iter->prevGlyphIndex = glyph != NULL ? glyph->index : -1;
+		break;
+	}
+	iter->next = str;
+
+	return 1;
+}
+
+void fonsDrawDebug(FONScontext* stash, float x, float y)
+{
+	int i;
+	int w = stash->params.width;
+	int h = stash->params.height;
+	float u = w == 0 ? 0 : (1.0f / w);
+	float v = h == 0 ? 0 : (1.0f / h);
+
+	if (stash->nverts+6+6 > FONS_VERTEX_COUNT)
+		fons__flush(stash);
+
+	// Draw background
+	fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
+	fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
+	fons__vertex(stash, x+w, y+0, u, v, 0x0fffffff);
+
+	fons__vertex(stash, x+0, y+0, u, v, 0x0fffffff);
+	fons__vertex(stash, x+0, y+h, u, v, 0x0fffffff);
+	fons__vertex(stash, x+w, y+h, u, v, 0x0fffffff);
+
+	// Draw texture
+	fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
+	fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
+	fons__vertex(stash, x+w, y+0, 1, 0, 0xffffffff);
+
+	fons__vertex(stash, x+0, y+0, 0, 0, 0xffffffff);
+	fons__vertex(stash, x+0, y+h, 0, 1, 0xffffffff);
+	fons__vertex(stash, x+w, y+h, 1, 1, 0xffffffff);
+
+	// Drawbug draw atlas
+	for (i = 0; i < stash->atlas->nnodes; i++) {
+		FONSatlasNode* n = &stash->atlas->nodes[i];
+
+		if (stash->nverts+6 > FONS_VERTEX_COUNT)
+			fons__flush(stash);
+
+		fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
+		fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
+		fons__vertex(stash, x+n->x+n->width, y+n->y+0, u, v, 0xc00000ff);
+
+		fons__vertex(stash, x+n->x+0, y+n->y+0, u, v, 0xc00000ff);
+		fons__vertex(stash, x+n->x+0, y+n->y+1, u, v, 0xc00000ff);
+		fons__vertex(stash, x+n->x+n->width, y+n->y+1, u, v, 0xc00000ff);
+	}
+
+	fons__flush(stash);
+}
+
+float fonsTextBounds(FONScontext* stash,
+					 float x, float y,
+					 const char* str, const char* end,
+					 float* bounds)
+{
+	FONSstate* state = fons__getState(stash);
+	unsigned int codepoint;
+	unsigned int utf8state = 0;
+	FONSquad q;
+	FONSglyph* glyph = NULL;
+	int prevGlyphIndex = -1;
+	short isize = (short)(state->size*10.0f);
+	short iblur = (short)state->blur;
+	float scale;
+	FONSfont* font;
+	float startx, advance;
+	float minx, miny, maxx, maxy;
+
+	if (stash == NULL) return 0;
+	if (state->font < 0 || state->font >= stash->nfonts) return 0;
+	font = stash->fonts[state->font];
+	if (font->data == NULL) return 0;
+
+	scale = fons__tt_getPixelHeightScale(&font->font, (float)isize/10.0f);
+
+	// Align vertically.
+	y += fons__getVertAlign(stash, font, state->align, isize);
+
+	minx = maxx = x;
+	miny = maxy = y;
+	startx = x;
+
+	if (end == NULL)
+		end = str + strlen(str);
+
+	for (; str != end; ++str) {
+		if (fons__decutf8(&utf8state, &codepoint, *(const unsigned char*)str))
+			continue;
+		glyph = fons__getGlyph(stash, font, codepoint, isize, iblur, FONS_GLYPH_BITMAP_OPTIONAL);
+		if (glyph != NULL) {
+			fons__getQuad(stash, font, prevGlyphIndex, glyph, scale, state->spacing, &x, &y, &q);
+			if (q.x0 < minx) minx = q.x0;
+			if (q.x1 > maxx) maxx = q.x1;
+			if (stash->params.flags & FONS_ZERO_TOPLEFT) {
+				if (q.y0 < miny) miny = q.y0;
+				if (q.y1 > maxy) maxy = q.y1;
+			} else {
+				if (q.y1 < miny) miny = q.y1;
+				if (q.y0 > maxy) maxy = q.y0;
+			}
+		}
+		prevGlyphIndex = glyph != NULL ? glyph->index : -1;
+	}
+
+	advance = x - startx;
+
+	// Align horizontally
+	if (state->align & FONS_ALIGN_LEFT) {
+		// empty
+	} else if (state->align & FONS_ALIGN_RIGHT) {
+		minx -= advance;
+		maxx -= advance;
+	} else if (state->align & FONS_ALIGN_CENTER) {
+		minx -= advance * 0.5f;
+		maxx -= advance * 0.5f;
+	}
+
+	if (bounds) {
+		bounds[0] = minx;
+		bounds[1] = miny;
+		bounds[2] = maxx;
+		bounds[3] = maxy;
+	}
+
+	return advance;
+}
+
+void fonsVertMetrics(FONScontext* stash,
+					 float* ascender, float* descender, float* lineh)
+{
+	FONSfont* font;
+	FONSstate* state = fons__getState(stash);
+	short isize;
+
+	if (stash == NULL) return;
+	if (state->font < 0 || state->font >= stash->nfonts) return;
+	font = stash->fonts[state->font];
+	isize = (short)(state->size*10.0f);
+	if (font->data == NULL) return;
+
+	if (ascender)
+		*ascender = font->ascender*isize/10.0f;
+	if (descender)
+		*descender = font->descender*isize/10.0f;
+	if (lineh)
+		*lineh = font->lineh*isize/10.0f;
+}
+
+void fonsLineBounds(FONScontext* stash, float y, float* miny, float* maxy)
+{
+	FONSfont* font;
+	FONSstate* state = fons__getState(stash);
+	short isize;
+
+	if (stash == NULL) return;
+	if (state->font < 0 || state->font >= stash->nfonts) return;
+	font = stash->fonts[state->font];
+	isize = (short)(state->size*10.0f);
+	if (font->data == NULL) return;
+
+	y += fons__getVertAlign(stash, font, state->align, isize);
+
+	if (stash->params.flags & FONS_ZERO_TOPLEFT) {
+		*miny = y - font->ascender * (float)isize/10.0f;
+		*maxy = *miny + font->lineh*isize/10.0f;
+	} else {
+		*maxy = y + font->descender * (float)isize/10.0f;
+		*miny = *maxy - font->lineh*isize/10.0f;
+	}
+}
+
+const unsigned char* fonsGetTextureData(FONScontext* stash, int* width, int* height)
+{
+	if (width != NULL)
+		*width = stash->params.width;
+	if (height != NULL)
+		*height = stash->params.height;
+	return stash->texData;
+}
+
+int fonsValidateTexture(FONScontext* stash, int* dirty)
+{
+	if (stash->dirtyRect[0] < stash->dirtyRect[2] && stash->dirtyRect[1] < stash->dirtyRect[3]) {
+		dirty[0] = stash->dirtyRect[0];
+		dirty[1] = stash->dirtyRect[1];
+		dirty[2] = stash->dirtyRect[2];
+		dirty[3] = stash->dirtyRect[3];
+		// Reset dirty rect
+		stash->dirtyRect[0] = stash->params.width;
+		stash->dirtyRect[1] = stash->params.height;
+		stash->dirtyRect[2] = 0;
+		stash->dirtyRect[3] = 0;
+		return 1;
+	}
+	return 0;
+}
+
+void fonsDeleteInternal(FONScontext* stash)
+{
+	int i;
+	if (stash == NULL) return;
+
+	if (stash->params.renderDelete)
+		stash->params.renderDelete(stash->params.userPtr);
+
+	for (i = 0; i < stash->nfonts; ++i)
+		fons__freeFont(stash->fonts[i]);
+
+	if (stash->atlas) fons__deleteAtlas(stash->atlas);
+	if (stash->fonts) free(stash->fonts);
+	if (stash->texData) free(stash->texData);
+	if (stash->scratch) free(stash->scratch);
+	fons__tt_done(stash);
+	free(stash);
+}
+
+void fonsSetErrorCallback(FONScontext* stash, void (*callback)(void* uptr, int error, int val), void* uptr)
+{
+	if (stash == NULL) return;
+	stash->handleError = callback;
+	stash->errorUptr = uptr;
+}
+
+void fonsGetAtlasSize(FONScontext* stash, int* width, int* height)
+{
+	if (stash == NULL) return;
+	*width = stash->params.width;
+	*height = stash->params.height;
+}
+
+int fonsExpandAtlas(FONScontext* stash, int width, int height)
+{
+	int i, maxy = 0;
+	unsigned char* data = NULL;
+	if (stash == NULL) return 0;
+
+	width = fons__maxi(width, stash->params.width);
+	height = fons__maxi(height, stash->params.height);
+
+	if (width == stash->params.width && height == stash->params.height)
+		return 1;
+
+	// Flush pending glyphs.
+	fons__flush(stash);
+
+	// Create new texture
+	if (stash->params.renderResize != NULL) {
+		if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
+			return 0;
+	}
+	// Copy old texture data over.
+	data = (unsigned char*)malloc(width * height);
+	if (data == NULL)
+		return 0;
+	for (i = 0; i < stash->params.height; i++) {
+		unsigned char* dst = &data[i*width];
+		unsigned char* src = &stash->texData[i*stash->params.width];
+		memcpy(dst, src, stash->params.width);
+		if (width > stash->params.width)
+			memset(dst+stash->params.width, 0, width - stash->params.width);
+	}
+	if (height > stash->params.height)
+		memset(&data[stash->params.height * width], 0, (height - stash->params.height) * width);
+
+	free(stash->texData);
+	stash->texData = data;
+
+	// Increase atlas size
+	fons__atlasExpand(stash->atlas, width, height);
+
+	// Add existing data as dirty.
+	for (i = 0; i < stash->atlas->nnodes; i++)
+		maxy = fons__maxi(maxy, stash->atlas->nodes[i].y);
+	stash->dirtyRect[0] = 0;
+	stash->dirtyRect[1] = 0;
+	stash->dirtyRect[2] = stash->params.width;
+	stash->dirtyRect[3] = maxy;
+
+	stash->params.width = width;
+	stash->params.height = height;
+	stash->itw = 1.0f/stash->params.width;
+	stash->ith = 1.0f/stash->params.height;
+
+	return 1;
+}
+
+int fonsResetAtlas(FONScontext* stash, int width, int height)
+{
+	int i, j;
+	if (stash == NULL) return 0;
+
+	// Flush pending glyphs.
+	fons__flush(stash);
+
+	// Create new texture
+	if (stash->params.renderResize != NULL) {
+		if (stash->params.renderResize(stash->params.userPtr, width, height) == 0)
+			return 0;
+	}
+
+	// Reset atlas
+	fons__atlasReset(stash->atlas, width, height);
+
+	// Clear texture data.
+	stash->texData = (unsigned char*)realloc(stash->texData, width * height);
+	if (stash->texData == NULL) return 0;
+	memset(stash->texData, 0, width * height);
+
+	// Reset dirty rect
+	stash->dirtyRect[0] = width;
+	stash->dirtyRect[1] = height;
+	stash->dirtyRect[2] = 0;
+	stash->dirtyRect[3] = 0;
+
+	// Reset cached glyphs
+	for (i = 0; i < stash->nfonts; i++) {
+		FONSfont* font = stash->fonts[i];
+		font->nglyphs = 0;
+		for (j = 0; j < FONS_HASH_LUT_SIZE; j++)
+			font->lut[j] = -1;
+	}
+
+	stash->params.width = width;
+	stash->params.height = height;
+	stash->itw = 1.0f/stash->params.width;
+	stash->ith = 1.0f/stash->params.height;
+
+	// Add white rect at 0,0 for debug drawing.
+	fons__addWhiteRect(stash, 2,2);
+
+	return 1;
+}
+
+#endif // FONTSTASH_IMPLEMENTATION
diff --git a/source/thirdparty/nanovg.c b/source/thirdparty/nanovg.c
new file mode 100644
index 0000000..7d226e8
--- /dev/null
+++ b/source/thirdparty/nanovg.c
@@ -0,0 +1,2960 @@
+//
+// Copyright (c) 2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <math.h>
+#include <memory.h>
+
+#include "android.h"
+
+#include "nanovg.h"
+
+#define FONTSTASH_IMPLEMENTATION
+#include "fontstash.h"
+
+#ifndef NVG_NO_STB
+#define STB_IMAGE_IMPLEMENTATION
+#include "../stb/stb_image.h"
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(disable: 4100)  // unreferenced formal parameter
+#pragma warning(disable: 4127)  // conditional expression is constant
+#pragma warning(disable: 4204)  // nonstandard extension used : non-constant aggregate initializer
+#pragma warning(disable: 4706)  // assignment within conditional expression
+#endif
+
+#define NVG_INIT_FONTIMAGE_SIZE  512
+#define NVG_MAX_FONTIMAGE_SIZE   2048
+#define NVG_MAX_FONTIMAGES       4
+
+#define NVG_INIT_COMMANDS_SIZE 256
+#define NVG_INIT_POINTS_SIZE 128
+#define NVG_INIT_PATHS_SIZE 16
+#define NVG_INIT_VERTS_SIZE 256
+
+#ifndef NVG_MAX_STATES
+#define NVG_MAX_STATES 64
+#endif
+
+#define NVG_KAPPA90 0.5522847493f	// Length proportional to radius of a cubic bezier handle for 90deg arcs.
+
+#define NVG_COUNTOF(arr) (sizeof(arr) / sizeof(0[arr]))
+
+
+enum NVGcommands {
+	NVG_MOVETO = 0,
+	NVG_LINETO = 1,
+	NVG_BEZIERTO = 2,
+	NVG_CLOSE = 3,
+	NVG_WINDING = 4,
+};
+
+enum NVGpointFlags
+{
+	NVG_PT_CORNER = 0x01,
+	NVG_PT_LEFT = 0x02,
+	NVG_PT_BEVEL = 0x04,
+	NVG_PR_INNERBEVEL = 0x08,
+};
+
+struct NVGstate {
+	NVGcompositeOperationState compositeOperation;
+	int shapeAntiAlias;
+	NVGpaint fill;
+	NVGpaint stroke;
+	float strokeWidth;
+	float miterLimit;
+	int lineJoin;
+	int lineCap;
+	float alpha;
+	float xform[6];
+	NVGscissor scissor;
+	float fontSize;
+	float letterSpacing;
+	float lineHeight;
+	float fontBlur;
+	int textAlign;
+	int fontId;
+};
+typedef struct NVGstate NVGstate;
+
+struct NVGpoint {
+	float x,y;
+	float dx, dy;
+	float len;
+	float dmx, dmy;
+	unsigned char flags;
+};
+typedef struct NVGpoint NVGpoint;
+
+struct NVGpathCache {
+	NVGpoint* points;
+	int npoints;
+	int cpoints;
+	NVGpath* paths;
+	int npaths;
+	int cpaths;
+	NVGvertex* verts;
+	int nverts;
+	int cverts;
+	float bounds[4];
+};
+typedef struct NVGpathCache NVGpathCache;
+
+struct NVGcontext {
+	NVGparams params;
+	float* commands;
+	int ccommands;
+	int ncommands;
+	float commandx, commandy;
+	NVGstate states[NVG_MAX_STATES];
+	int nstates;
+	NVGpathCache* cache;
+	float tessTol;
+	float distTol;
+	float fringeWidth;
+	float devicePxRatio;
+	struct FONScontext* fs;
+	int fontImages[NVG_MAX_FONTIMAGES];
+	int fontImageIdx;
+	int drawCallCount;
+	int fillTriCount;
+	int strokeTriCount;
+	int textTriCount;
+};
+
+static float nvg__sqrtf(float a) { return sqrtf(a); }
+static float nvg__modf(float a, float b) { return fmodf(a, b); }
+static float nvg__sinf(float a) { return sinf(a); }
+static float nvg__cosf(float a) { return cosf(a); }
+static float nvg__tanf(float a) { return tanf(a); }
+static float nvg__atan2f(float a,float b) { return atan2f(a, b); }
+static float nvg__acosf(float a) { return acosf(a); }
+
+static int nvg__mini(int a, int b) { return a < b ? a : b; }
+static int nvg__maxi(int a, int b) { return a > b ? a : b; }
+static int nvg__clampi(int a, int mn, int mx) { return a < mn ? mn : (a > mx ? mx : a); }
+static float nvg__minf(float a, float b) { return a < b ? a : b; }
+static float nvg__maxf(float a, float b) { return a > b ? a : b; }
+static float nvg__absf(float a) { return a >= 0.0f ? a : -a; }
+static float nvg__signf(float a) { return a >= 0.0f ? 1.0f : -1.0f; }
+static float nvg__clampf(float a, float mn, float mx) { return a < mn ? mn : (a > mx ? mx : a); }
+static float nvg__cross(float dx0, float dy0, float dx1, float dy1) { return dx1*dy0 - dx0*dy1; }
+
+static float nvg__normalize(float *x, float* y)
+{
+	float d = nvg__sqrtf((*x)*(*x) + (*y)*(*y));
+	if (d > 1e-6f) {
+		float id = 1.0f / d;
+		*x *= id;
+		*y *= id;
+	}
+	return d;
+}
+
+
+static void nvg__deletePathCache(NVGpathCache* c)
+{
+	if (c == NULL) return;
+	if (c->points != NULL) free(c->points);
+	if (c->paths != NULL) free(c->paths);
+	if (c->verts != NULL) free(c->verts);
+	free(c);
+}
+
+static NVGpathCache* nvg__allocPathCache(void)
+{
+	NVGpathCache* c = (NVGpathCache*)malloc(sizeof(NVGpathCache));
+	if (c == NULL) goto error;
+	memset(c, 0, sizeof(NVGpathCache));
+
+	c->points = (NVGpoint*)malloc(sizeof(NVGpoint)*NVG_INIT_POINTS_SIZE);
+	if (!c->points) goto error;
+	c->npoints = 0;
+	c->cpoints = NVG_INIT_POINTS_SIZE;
+
+	c->paths = (NVGpath*)malloc(sizeof(NVGpath)*NVG_INIT_PATHS_SIZE);
+	if (!c->paths) goto error;
+	c->npaths = 0;
+	c->cpaths = NVG_INIT_PATHS_SIZE;
+
+	c->verts = (NVGvertex*)malloc(sizeof(NVGvertex)*NVG_INIT_VERTS_SIZE);
+	if (!c->verts) goto error;
+	c->nverts = 0;
+	c->cverts = NVG_INIT_VERTS_SIZE;
+
+	return c;
+error:
+	nvg__deletePathCache(c);
+	return NULL;
+}
+
+static void nvg__setDevicePixelRatio(NVGcontext* ctx, float ratio)
+{
+	ctx->tessTol = 0.25f / ratio;
+	ctx->distTol = 0.01f / ratio;
+	ctx->fringeWidth = 1.0f / ratio;
+	ctx->devicePxRatio = ratio;
+}
+
+static NVGcompositeOperationState nvg__compositeOperationState(int op)
+{
+	int sfactor, dfactor;
+
+	if (op == NVG_SOURCE_OVER)
+	{
+		sfactor = NVG_ONE;
+		dfactor = NVG_ONE_MINUS_SRC_ALPHA;
+	}
+	else if (op == NVG_SOURCE_IN)
+	{
+		sfactor = NVG_DST_ALPHA;
+		dfactor = NVG_ZERO;
+	}
+	else if (op == NVG_SOURCE_OUT)
+	{
+		sfactor = NVG_ONE_MINUS_DST_ALPHA;
+		dfactor = NVG_ZERO;
+	}
+	else if (op == NVG_ATOP)
+	{
+		sfactor = NVG_DST_ALPHA;
+		dfactor = NVG_ONE_MINUS_SRC_ALPHA;
+	}
+	else if (op == NVG_DESTINATION_OVER)
+	{
+		sfactor = NVG_ONE_MINUS_DST_ALPHA;
+		dfactor = NVG_ONE;
+	}
+	else if (op == NVG_DESTINATION_IN)
+	{
+		sfactor = NVG_ZERO;
+		dfactor = NVG_SRC_ALPHA;
+	}
+	else if (op == NVG_DESTINATION_OUT)
+	{
+		sfactor = NVG_ZERO;
+		dfactor = NVG_ONE_MINUS_SRC_ALPHA;
+	}
+	else if (op == NVG_DESTINATION_ATOP)
+	{
+		sfactor = NVG_ONE_MINUS_DST_ALPHA;
+		dfactor = NVG_SRC_ALPHA;
+	}
+	else if (op == NVG_LIGHTER)
+	{
+		sfactor = NVG_ONE;
+		dfactor = NVG_ONE;
+	}
+	else if (op == NVG_COPY)
+	{
+		sfactor = NVG_ONE;
+		dfactor = NVG_ZERO;
+	}
+	else if (op == NVG_XOR)
+	{
+		sfactor = NVG_ONE_MINUS_DST_ALPHA;
+		dfactor = NVG_ONE_MINUS_SRC_ALPHA;
+	}
+	else
+	{
+		sfactor = NVG_ONE;
+		dfactor = NVG_ZERO;
+	}
+
+	NVGcompositeOperationState state;
+	state.srcRGB = sfactor;
+	state.dstRGB = dfactor;
+	state.srcAlpha = sfactor;
+	state.dstAlpha = dfactor;
+	return state;
+}
+
+static NVGstate* nvg__getState(NVGcontext* ctx)
+{
+	return &ctx->states[ctx->nstates-1];
+}
+
+NVGcontext* nvgCreateInternal(NVGparams* params)
+{
+	FONSparams fontParams;
+	NVGcontext* ctx = (NVGcontext*)malloc(sizeof(NVGcontext));
+	int i;
+	if (ctx == NULL) goto error;
+	memset(ctx, 0, sizeof(NVGcontext));
+
+	ctx->params = *params;
+	for (i = 0; i < NVG_MAX_FONTIMAGES; i++)
+		ctx->fontImages[i] = 0;
+
+	ctx->commands = (float*)malloc(sizeof(float)*NVG_INIT_COMMANDS_SIZE);
+	if (!ctx->commands) goto error;
+	ctx->ncommands = 0;
+	ctx->ccommands = NVG_INIT_COMMANDS_SIZE;
+
+	ctx->cache = nvg__allocPathCache();
+	if (ctx->cache == NULL) goto error;
+
+	nvgSave(ctx);
+	nvgReset(ctx);
+
+	nvg__setDevicePixelRatio(ctx, 1.0f);
+
+	if (ctx->params.renderCreate(ctx->params.userPtr) == 0) goto error;
+
+	// Init font rendering
+	memset(&fontParams, 0, sizeof(fontParams));
+	fontParams.width = NVG_INIT_FONTIMAGE_SIZE;
+	fontParams.height = NVG_INIT_FONTIMAGE_SIZE;
+	fontParams.flags = FONS_ZERO_TOPLEFT;
+	fontParams.renderCreate = NULL;
+	fontParams.renderUpdate = NULL;
+	fontParams.renderDraw = NULL;
+	fontParams.renderDelete = NULL;
+	fontParams.userPtr = NULL;
+	ctx->fs = fonsCreateInternal(&fontParams);
+	if (ctx->fs == NULL) goto error;
+
+	// Create font texture
+	ctx->fontImages[0] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, fontParams.width, fontParams.height, 0, NULL);
+	if (ctx->fontImages[0] == 0) goto error;
+	ctx->fontImageIdx = 0;
+
+	return ctx;
+
+error:
+	nvgDeleteInternal(ctx);
+	return 0;
+}
+
+NVGparams* nvgInternalParams(NVGcontext* ctx)
+{
+    return &ctx->params;
+}
+
+void nvgDeleteInternal(NVGcontext* ctx)
+{
+	int i;
+	if (ctx == NULL) return;
+	if (ctx->commands != NULL) free(ctx->commands);
+	if (ctx->cache != NULL) nvg__deletePathCache(ctx->cache);
+
+	if (ctx->fs)
+		fonsDeleteInternal(ctx->fs);
+
+	for (i = 0; i < NVG_MAX_FONTIMAGES; i++) {
+		if (ctx->fontImages[i] != 0) {
+			nvgDeleteImage(ctx, ctx->fontImages[i]);
+			ctx->fontImages[i] = 0;
+		}
+	}
+
+	if (ctx->params.renderDelete != NULL)
+		ctx->params.renderDelete(ctx->params.userPtr);
+
+	free(ctx);
+}
+
+void nvgBeginFrame(NVGcontext* ctx, float windowWidth, float windowHeight, float devicePixelRatio)
+{
+/*	printf("Tris: draws:%d  fill:%d  stroke:%d  text:%d  TOT:%d\n",
+		ctx->drawCallCount, ctx->fillTriCount, ctx->strokeTriCount, ctx->textTriCount,
+		ctx->fillTriCount+ctx->strokeTriCount+ctx->textTriCount);*/
+
+	ctx->nstates = 0;
+	nvgSave(ctx);
+	nvgReset(ctx);
+
+	nvg__setDevicePixelRatio(ctx, devicePixelRatio);
+
+	ctx->params.renderViewport(ctx->params.userPtr, windowWidth, windowHeight, devicePixelRatio);
+
+	ctx->drawCallCount = 0;
+	ctx->fillTriCount = 0;
+	ctx->strokeTriCount = 0;
+	ctx->textTriCount = 0;
+}
+
+void nvgCancelFrame(NVGcontext* ctx)
+{
+	ctx->params.renderCancel(ctx->params.userPtr);
+}
+
+void nvgEndFrame(NVGcontext* ctx)
+{
+	ctx->params.renderFlush(ctx->params.userPtr);
+	if (ctx->fontImageIdx != 0) {
+		int fontImage = ctx->fontImages[ctx->fontImageIdx];
+		ctx->fontImages[ctx->fontImageIdx] = 0;
+		int i, j, iw, ih;
+		// delete images that smaller than current one
+		if (fontImage == 0)
+			return;
+		nvgImageSize(ctx, fontImage, &iw, &ih);
+		for (i = j = 0; i < ctx->fontImageIdx; i++) {
+			if (ctx->fontImages[i] != 0) {
+				int nw, nh;
+				int image = ctx->fontImages[i];
+				ctx->fontImages[i] = 0;
+				nvgImageSize(ctx, image, &nw, &nh);
+				if (nw < iw || nh < ih)
+					nvgDeleteImage(ctx, image);
+				else
+					ctx->fontImages[j++] = image;
+			}
+		}
+		// make current font image to first
+		ctx->fontImages[j] = ctx->fontImages[0];
+		ctx->fontImages[0] = fontImage;
+		ctx->fontImageIdx = 0;
+	}
+}
+
+NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b)
+{
+	return nvgRGBA(r,g,b,255);
+}
+
+NVGcolor nvgRGBf(float r, float g, float b)
+{
+	return nvgRGBAf(r,g,b,1.0f);
+}
+
+NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a)
+{
+	NVGcolor color;
+	// Use longer initialization to suppress warning.
+	color.r = r / 255.0f;
+	color.g = g / 255.0f;
+	color.b = b / 255.0f;
+	color.a = a / 255.0f;
+	return color;
+}
+
+NVGcolor nvgRGBAf(float r, float g, float b, float a)
+{
+	NVGcolor color;
+	// Use longer initialization to suppress warning.
+	color.r = r;
+	color.g = g;
+	color.b = b;
+	color.a = a;
+	return color;
+}
+
+NVGcolor nvgTransRGBA(NVGcolor c, unsigned char a)
+{
+	c.a = a / 255.0f;
+	return c;
+}
+
+NVGcolor nvgTransRGBAf(NVGcolor c, float a)
+{
+	c.a = a;
+	return c;
+}
+
+NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u)
+{
+	int i;
+	float oneminu;
+	NVGcolor cint = {{{0}}};
+
+	u = nvg__clampf(u, 0.0f, 1.0f);
+	oneminu = 1.0f - u;
+	for( i = 0; i <4; i++ )
+	{
+		cint.rgba[i] = c0.rgba[i] * oneminu + c1.rgba[i] * u;
+	}
+
+	return cint;
+}
+
+NVGcolor nvgHSL(float h, float s, float l)
+{
+	return nvgHSLA(h,s,l,255);
+}
+
+static float nvg__hue(float h, float m1, float m2)
+{
+	if (h < 0) h += 1;
+	if (h > 1) h -= 1;
+	if (h < 1.0f/6.0f)
+		return m1 + (m2 - m1) * h * 6.0f;
+	else if (h < 3.0f/6.0f)
+		return m2;
+	else if (h < 4.0f/6.0f)
+		return m1 + (m2 - m1) * (2.0f/3.0f - h) * 6.0f;
+	return m1;
+}
+
+NVGcolor nvgHSLA(float h, float s, float l, unsigned char a)
+{
+	float m1, m2;
+	NVGcolor col;
+	h = nvg__modf(h, 1.0f);
+	if (h < 0.0f) h += 1.0f;
+	s = nvg__clampf(s, 0.0f, 1.0f);
+	l = nvg__clampf(l, 0.0f, 1.0f);
+	m2 = l <= 0.5f ? (l * (1 + s)) : (l + s - l * s);
+	m1 = 2 * l - m2;
+	col.r = nvg__clampf(nvg__hue(h + 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
+	col.g = nvg__clampf(nvg__hue(h, m1, m2), 0.0f, 1.0f);
+	col.b = nvg__clampf(nvg__hue(h - 1.0f/3.0f, m1, m2), 0.0f, 1.0f);
+	col.a = a/255.0f;
+	return col;
+}
+
+void nvgTransformIdentity(float* t)
+{
+	t[0] = 1.0f; t[1] = 0.0f;
+	t[2] = 0.0f; t[3] = 1.0f;
+	t[4] = 0.0f; t[5] = 0.0f;
+}
+
+void nvgTransformTranslate(float* t, float tx, float ty)
+{
+	t[0] = 1.0f; t[1] = 0.0f;
+	t[2] = 0.0f; t[3] = 1.0f;
+	t[4] = tx; t[5] = ty;
+}
+
+void nvgTransformScale(float* t, float sx, float sy)
+{
+	t[0] = sx; t[1] = 0.0f;
+	t[2] = 0.0f; t[3] = sy;
+	t[4] = 0.0f; t[5] = 0.0f;
+}
+
+void nvgTransformRotate(float* t, float a)
+{
+	float cs = nvg__cosf(a), sn = nvg__sinf(a);
+	t[0] = cs; t[1] = sn;
+	t[2] = -sn; t[3] = cs;
+	t[4] = 0.0f; t[5] = 0.0f;
+}
+
+void nvgTransformSkewX(float* t, float a)
+{
+	t[0] = 1.0f; t[1] = 0.0f;
+	t[2] = nvg__tanf(a); t[3] = 1.0f;
+	t[4] = 0.0f; t[5] = 0.0f;
+}
+
+void nvgTransformSkewY(float* t, float a)
+{
+	t[0] = 1.0f; t[1] = nvg__tanf(a);
+	t[2] = 0.0f; t[3] = 1.0f;
+	t[4] = 0.0f; t[5] = 0.0f;
+}
+
+void nvgTransformMultiply(float* t, const float* s)
+{
+	float t0 = t[0] * s[0] + t[1] * s[2];
+	float t2 = t[2] * s[0] + t[3] * s[2];
+	float t4 = t[4] * s[0] + t[5] * s[2] + s[4];
+	t[1] = t[0] * s[1] + t[1] * s[3];
+	t[3] = t[2] * s[1] + t[3] * s[3];
+	t[5] = t[4] * s[1] + t[5] * s[3] + s[5];
+	t[0] = t0;
+	t[2] = t2;
+	t[4] = t4;
+}
+
+void nvgTransformPremultiply(float* t, const float* s)
+{
+	float s2[6];
+	memcpy(s2, s, sizeof(float)*6);
+	nvgTransformMultiply(s2, t);
+	memcpy(t, s2, sizeof(float)*6);
+}
+
+int nvgTransformInverse(float* inv, const float* t)
+{
+	double invdet, det = (double)t[0] * t[3] - (double)t[2] * t[1];
+	if (det > -1e-6 && det < 1e-6) {
+		nvgTransformIdentity(inv);
+		return 0;
+	}
+	invdet = 1.0 / det;
+	inv[0] = (float)(t[3] * invdet);
+	inv[2] = (float)(-t[2] * invdet);
+	inv[4] = (float)(((double)t[2] * t[5] - (double)t[3] * t[4]) * invdet);
+	inv[1] = (float)(-t[1] * invdet);
+	inv[3] = (float)(t[0] * invdet);
+	inv[5] = (float)(((double)t[1] * t[4] - (double)t[0] * t[5]) * invdet);
+	return 1;
+}
+
+void nvgTransformPoint(float* dx, float* dy, const float* t, float sx, float sy)
+{
+	*dx = sx*t[0] + sy*t[2] + t[4];
+	*dy = sx*t[1] + sy*t[3] + t[5];
+}
+
+float nvgDegToRad(float deg)
+{
+	return deg / 180.0f * NVG_PI;
+}
+
+float nvgRadToDeg(float rad)
+{
+	return rad / NVG_PI * 180.0f;
+}
+
+static void nvg__setPaintColor(NVGpaint* p, NVGcolor color)
+{
+	memset(p, 0, sizeof(*p));
+	nvgTransformIdentity(p->xform);
+	p->radius = 0.0f;
+	p->feather = 1.0f;
+	p->innerColor = color;
+	p->outerColor = color;
+}
+
+
+// State handling
+void nvgSave(NVGcontext* ctx)
+{
+	if (ctx->nstates >= NVG_MAX_STATES)
+		return;
+	if (ctx->nstates > 0)
+		memcpy(&ctx->states[ctx->nstates], &ctx->states[ctx->nstates-1], sizeof(NVGstate));
+	ctx->nstates++;
+}
+
+void nvgRestore(NVGcontext* ctx)
+{
+	if (ctx->nstates <= 1)
+		return;
+	ctx->nstates--;
+}
+
+void nvgReset(NVGcontext* ctx)
+{
+	NVGstate* state = nvg__getState(ctx);
+	memset(state, 0, sizeof(*state));
+
+	nvg__setPaintColor(&state->fill, nvgRGBA(255,255,255,255));
+	nvg__setPaintColor(&state->stroke, nvgRGBA(0,0,0,255));
+	state->compositeOperation = nvg__compositeOperationState(NVG_SOURCE_OVER);
+	state->shapeAntiAlias = 1;
+	state->strokeWidth = 1.0f;
+	state->miterLimit = 10.0f;
+	state->lineCap = NVG_BUTT;
+	state->lineJoin = NVG_MITER;
+	state->alpha = 1.0f;
+	nvgTransformIdentity(state->xform);
+
+	state->scissor.extent[0] = -1.0f;
+	state->scissor.extent[1] = -1.0f;
+
+	state->fontSize = 16.0f;
+	state->letterSpacing = 0.0f;
+	state->lineHeight = 1.0f;
+	state->fontBlur = 0.0f;
+	state->textAlign = NVG_ALIGN_LEFT | NVG_ALIGN_BASELINE;
+	state->fontId = 0;
+}
+
+// State setting
+void nvgShapeAntiAlias(NVGcontext* ctx, int enabled)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->shapeAntiAlias = enabled;
+}
+
+void nvgStrokeWidth(NVGcontext* ctx, float width)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->strokeWidth = width;
+}
+
+void nvgMiterLimit(NVGcontext* ctx, float limit)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->miterLimit = limit;
+}
+
+void nvgLineCap(NVGcontext* ctx, int cap)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->lineCap = cap;
+}
+
+void nvgLineJoin(NVGcontext* ctx, int join)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->lineJoin = join;
+}
+
+void nvgGlobalAlpha(NVGcontext* ctx, float alpha)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->alpha = alpha;
+}
+
+void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6] = { a, b, c, d, e, f };
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgResetTransform(NVGcontext* ctx)
+{
+	NVGstate* state = nvg__getState(ctx);
+	nvgTransformIdentity(state->xform);
+}
+
+void nvgTranslate(NVGcontext* ctx, float x, float y)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6];
+	nvgTransformTranslate(t, x,y);
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgRotate(NVGcontext* ctx, float angle)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6];
+	nvgTransformRotate(t, angle);
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgSkewX(NVGcontext* ctx, float angle)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6];
+	nvgTransformSkewX(t, angle);
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgSkewY(NVGcontext* ctx, float angle)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6];
+	nvgTransformSkewY(t, angle);
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgScale(NVGcontext* ctx, float x, float y)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float t[6];
+	nvgTransformScale(t, x,y);
+	nvgTransformPremultiply(state->xform, t);
+}
+
+void nvgCurrentTransform(NVGcontext* ctx, float* xform)
+{
+	NVGstate* state = nvg__getState(ctx);
+	if (xform == NULL) return;
+	memcpy(xform, state->xform, sizeof(float)*6);
+}
+
+void nvgStrokeColor(NVGcontext* ctx, NVGcolor color)
+{
+	NVGstate* state = nvg__getState(ctx);
+	nvg__setPaintColor(&state->stroke, color);
+}
+
+void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->stroke = paint;
+	nvgTransformMultiply(state->stroke.xform, state->xform);
+}
+
+void nvgFillColor(NVGcontext* ctx, NVGcolor color)
+{
+	NVGstate* state = nvg__getState(ctx);
+	nvg__setPaintColor(&state->fill, color);
+}
+
+void nvgFillPaint(NVGcontext* ctx, NVGpaint paint)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->fill = paint;
+	nvgTransformMultiply(state->fill.xform, state->xform);
+}
+
+#ifndef NVG_NO_STB
+int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags)
+{
+	int w, h, n, image;
+	unsigned char* img;
+	stbi_set_unpremultiply_on_load(1);
+	stbi_convert_iphone_png_to_rgb(1);
+	img = stbi_load(filename, &w, &h, &n, 4);
+	if (img == NULL) {
+//		printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
+		return 0;
+	}
+	image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img);
+	stbi_image_free(img);
+	return image;
+}
+
+int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata)
+{
+	int w, h, n, image;
+	unsigned char* img = stbi_load_from_memory(data, ndata, &w, &h, &n, 4);
+	if (img == NULL) {
+//		printf("Failed to load %s - %s\n", filename, stbi_failure_reason());
+		return 0;
+	}
+	image = nvgCreateImageRGBA(ctx, w, h, imageFlags, img);
+	stbi_image_free(img);
+	return image;
+}
+#endif
+
+int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data)
+{
+	return ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_RGBA, w, h, imageFlags, data);
+}
+
+int nvgCreateImageAlpha(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data)
+{
+	return ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, w, h, imageFlags, data);
+}
+
+void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data)
+{
+	int w, h;
+	ctx->params.renderGetTextureSize(ctx->params.userPtr, image, &w, &h);
+	ctx->params.renderUpdateTexture(ctx->params.userPtr, image, 0,0, w,h, data);
+}
+
+void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h)
+{
+	ctx->params.renderGetTextureSize(ctx->params.userPtr, image, w, h);
+}
+
+void nvgDeleteImage(NVGcontext* ctx, int image)
+{
+	ctx->params.renderDeleteTexture(ctx->params.userPtr, image);
+}
+
+NVGpaint nvgLinearGradient(NVGcontext* ctx,
+								  float sx, float sy, float ex, float ey,
+								  NVGcolor icol, NVGcolor ocol)
+{
+	NVGpaint p;
+	float dx, dy, d;
+	const float large = 1e5;
+	NVG_NOTUSED(ctx);
+	memset(&p, 0, sizeof(p));
+
+	// Calculate transform aligned to the line
+	dx = ex - sx;
+	dy = ey - sy;
+	d = sqrtf(dx*dx + dy*dy);
+	if (d > 0.0001f) {
+		dx /= d;
+		dy /= d;
+	} else {
+		dx = 0;
+		dy = 1;
+	}
+
+	p.xform[0] = dy; p.xform[1] = -dx;
+	p.xform[2] = dx; p.xform[3] = dy;
+	p.xform[4] = sx - dx*large; p.xform[5] = sy - dy*large;
+
+	p.extent[0] = large;
+	p.extent[1] = large + d*0.5f;
+
+	p.radius = 0.0f;
+
+	p.feather = nvg__maxf(1.0f, d);
+
+	p.innerColor = icol;
+	p.outerColor = ocol;
+
+	return p;
+}
+
+NVGpaint nvgRadialGradient(NVGcontext* ctx,
+								  float cx, float cy, float inr, float outr,
+								  NVGcolor icol, NVGcolor ocol)
+{
+	NVGpaint p;
+	float r = (inr+outr)*0.5f;
+	float f = (outr-inr);
+	NVG_NOTUSED(ctx);
+	memset(&p, 0, sizeof(p));
+
+	nvgTransformIdentity(p.xform);
+	p.xform[4] = cx;
+	p.xform[5] = cy;
+
+	p.extent[0] = r;
+	p.extent[1] = r;
+
+	p.radius = r;
+
+	p.feather = nvg__maxf(1.0f, f);
+
+	p.innerColor = icol;
+	p.outerColor = ocol;
+
+	return p;
+}
+
+NVGpaint nvgBoxGradient(NVGcontext* ctx,
+							   float x, float y, float w, float h, float r, float f,
+							   NVGcolor icol, NVGcolor ocol)
+{
+	NVGpaint p;
+	NVG_NOTUSED(ctx);
+	memset(&p, 0, sizeof(p));
+
+	nvgTransformIdentity(p.xform);
+	p.xform[4] = x+w*0.5f;
+	p.xform[5] = y+h*0.5f;
+
+	p.extent[0] = w*0.5f;
+	p.extent[1] = h*0.5f;
+
+	p.radius = r;
+
+	p.feather = nvg__maxf(1.0f, f);
+
+	p.innerColor = icol;
+	p.outerColor = ocol;
+
+	return p;
+}
+
+
+NVGpaint nvgImagePattern(NVGcontext* ctx,
+								float cx, float cy, float w, float h, float angle,
+								int image, float alpha)
+{
+	NVGpaint p;
+	NVG_NOTUSED(ctx);
+	memset(&p, 0, sizeof(p));
+
+	nvgTransformRotate(p.xform, angle);
+	p.xform[4] = cx;
+	p.xform[5] = cy;
+
+	p.extent[0] = w;
+	p.extent[1] = h;
+
+	p.image = image;
+
+	p.innerColor = p.outerColor = nvgRGBAf(1,1,1,alpha);
+
+	return p;
+}
+
+// Scissoring
+void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h)
+{
+	NVGstate* state = nvg__getState(ctx);
+
+	w = nvg__maxf(0.0f, w);
+	h = nvg__maxf(0.0f, h);
+
+	nvgTransformIdentity(state->scissor.xform);
+	state->scissor.xform[4] = x+w*0.5f;
+	state->scissor.xform[5] = y+h*0.5f;
+	nvgTransformMultiply(state->scissor.xform, state->xform);
+
+	state->scissor.extent[0] = w*0.5f;
+	state->scissor.extent[1] = h*0.5f;
+}
+
+static void nvg__isectRects(float* dst,
+							float ax, float ay, float aw, float ah,
+							float bx, float by, float bw, float bh)
+{
+	float minx = nvg__maxf(ax, bx);
+	float miny = nvg__maxf(ay, by);
+	float maxx = nvg__minf(ax+aw, bx+bw);
+	float maxy = nvg__minf(ay+ah, by+bh);
+	dst[0] = minx;
+	dst[1] = miny;
+	dst[2] = nvg__maxf(0.0f, maxx - minx);
+	dst[3] = nvg__maxf(0.0f, maxy - miny);
+}
+
+void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float pxform[6], invxorm[6];
+	float rect[4];
+	float ex, ey, tex, tey;
+
+	// If no previous scissor has been set, set the scissor as current scissor.
+	if (state->scissor.extent[0] < 0) {
+		nvgScissor(ctx, x, y, w, h);
+		return;
+	}
+
+	// Transform the current scissor rect into current transform space.
+	// If there is difference in rotation, this will be approximation.
+	memcpy(pxform, state->scissor.xform, sizeof(float)*6);
+	ex = state->scissor.extent[0];
+	ey = state->scissor.extent[1];
+	nvgTransformInverse(invxorm, state->xform);
+	nvgTransformMultiply(pxform, invxorm);
+	tex = ex*nvg__absf(pxform[0]) + ey*nvg__absf(pxform[2]);
+	tey = ex*nvg__absf(pxform[1]) + ey*nvg__absf(pxform[3]);
+
+	// Intersect rects.
+	nvg__isectRects(rect, pxform[4]-tex,pxform[5]-tey,tex*2,tey*2, x,y,w,h);
+
+	nvgScissor(ctx, rect[0], rect[1], rect[2], rect[3]);
+}
+
+void nvgResetScissor(NVGcontext* ctx)
+{
+	NVGstate* state = nvg__getState(ctx);
+	memset(state->scissor.xform, 0, sizeof(state->scissor.xform));
+	state->scissor.extent[0] = -1.0f;
+	state->scissor.extent[1] = -1.0f;
+}
+
+// Global composite operation.
+void nvgGlobalCompositeOperation(NVGcontext* ctx, int op)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->compositeOperation = nvg__compositeOperationState(op);
+}
+
+void nvgGlobalCompositeBlendFunc(NVGcontext* ctx, int sfactor, int dfactor)
+{
+	nvgGlobalCompositeBlendFuncSeparate(ctx, sfactor, dfactor, sfactor, dfactor);
+}
+
+void nvgGlobalCompositeBlendFuncSeparate(NVGcontext* ctx, int srcRGB, int dstRGB, int srcAlpha, int dstAlpha)
+{
+	NVGcompositeOperationState op;
+	op.srcRGB = srcRGB;
+	op.dstRGB = dstRGB;
+	op.srcAlpha = srcAlpha;
+	op.dstAlpha = dstAlpha;
+
+	NVGstate* state = nvg__getState(ctx);
+	state->compositeOperation = op;
+}
+
+static int nvg__ptEquals(float x1, float y1, float x2, float y2, float tol)
+{
+	float dx = x2 - x1;
+	float dy = y2 - y1;
+	return dx*dx + dy*dy < tol*tol;
+}
+
+static float nvg__distPtSeg(float x, float y, float px, float py, float qx, float qy)
+{
+	float pqx, pqy, dx, dy, d, t;
+	pqx = qx-px;
+	pqy = qy-py;
+	dx = x-px;
+	dy = y-py;
+	d = pqx*pqx + pqy*pqy;
+	t = pqx*dx + pqy*dy;
+	if (d > 0) t /= d;
+	if (t < 0) t = 0;
+	else if (t > 1) t = 1;
+	dx = px + t*pqx - x;
+	dy = py + t*pqy - y;
+	return dx*dx + dy*dy;
+}
+
+static void nvg__appendCommands(NVGcontext* ctx, float* vals, int nvals)
+{
+	NVGstate* state = nvg__getState(ctx);
+	int i;
+
+	if (ctx->ncommands+nvals > ctx->ccommands) {
+		float* commands;
+		int ccommands = ctx->ncommands+nvals + ctx->ccommands/2;
+		commands = (float*)realloc(ctx->commands, sizeof(float)*ccommands);
+		if (commands == NULL) return;
+		ctx->commands = commands;
+		ctx->ccommands = ccommands;
+	}
+
+	if ((int)vals[0] != NVG_CLOSE && (int)vals[0] != NVG_WINDING) {
+		ctx->commandx = vals[nvals-2];
+		ctx->commandy = vals[nvals-1];
+	}
+
+	// transform commands
+	i = 0;
+	while (i < nvals) {
+		int cmd = (int)vals[i];
+		switch (cmd) {
+		case NVG_MOVETO:
+			nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
+			i += 3;
+			break;
+		case NVG_LINETO:
+			nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
+			i += 3;
+			break;
+		case NVG_BEZIERTO:
+			nvgTransformPoint(&vals[i+1],&vals[i+2], state->xform, vals[i+1],vals[i+2]);
+			nvgTransformPoint(&vals[i+3],&vals[i+4], state->xform, vals[i+3],vals[i+4]);
+			nvgTransformPoint(&vals[i+5],&vals[i+6], state->xform, vals[i+5],vals[i+6]);
+			i += 7;
+			break;
+		case NVG_CLOSE:
+			i++;
+			break;
+		case NVG_WINDING:
+			i += 2;
+			break;
+		default:
+			i++;
+		}
+	}
+
+	memcpy(&ctx->commands[ctx->ncommands], vals, nvals*sizeof(float));
+
+	ctx->ncommands += nvals;
+}
+
+
+static void nvg__clearPathCache(NVGcontext* ctx)
+{
+	ctx->cache->npoints = 0;
+	ctx->cache->npaths = 0;
+}
+
+static NVGpath* nvg__lastPath(NVGcontext* ctx)
+{
+	if (ctx->cache->npaths > 0)
+		return &ctx->cache->paths[ctx->cache->npaths-1];
+	return NULL;
+}
+
+static void nvg__addPath(NVGcontext* ctx)
+{
+	NVGpath* path;
+	if (ctx->cache->npaths+1 > ctx->cache->cpaths) {
+		NVGpath* paths;
+		int cpaths = ctx->cache->npaths+1 + ctx->cache->cpaths/2;
+		paths = (NVGpath*)realloc(ctx->cache->paths, sizeof(NVGpath)*cpaths);
+		if (paths == NULL) return;
+		ctx->cache->paths = paths;
+		ctx->cache->cpaths = cpaths;
+	}
+	path = &ctx->cache->paths[ctx->cache->npaths];
+	memset(path, 0, sizeof(*path));
+	path->first = ctx->cache->npoints;
+	path->winding = NVG_CCW;
+
+	ctx->cache->npaths++;
+}
+
+static NVGpoint* nvg__lastPoint(NVGcontext* ctx)
+{
+	if (ctx->cache->npoints > 0)
+		return &ctx->cache->points[ctx->cache->npoints-1];
+	return NULL;
+}
+
+static void nvg__addPoint(NVGcontext* ctx, float x, float y, int flags)
+{
+	NVGpath* path = nvg__lastPath(ctx);
+	NVGpoint* pt;
+	if (path == NULL) return;
+
+	if (path->count > 0 && ctx->cache->npoints > 0) {
+		pt = nvg__lastPoint(ctx);
+		if (nvg__ptEquals(pt->x,pt->y, x,y, ctx->distTol)) {
+			pt->flags |= flags;
+			return;
+		}
+	}
+
+	if (ctx->cache->npoints+1 > ctx->cache->cpoints) {
+		NVGpoint* points;
+		int cpoints = ctx->cache->npoints+1 + ctx->cache->cpoints/2;
+		points = (NVGpoint*)realloc(ctx->cache->points, sizeof(NVGpoint)*cpoints);
+		if (points == NULL) return;
+		ctx->cache->points = points;
+		ctx->cache->cpoints = cpoints;
+	}
+
+	pt = &ctx->cache->points[ctx->cache->npoints];
+	memset(pt, 0, sizeof(*pt));
+	pt->x = x;
+	pt->y = y;
+	pt->flags = (unsigned char)flags;
+
+	ctx->cache->npoints++;
+	path->count++;
+}
+
+static void nvg__closePath(NVGcontext* ctx)
+{
+	NVGpath* path = nvg__lastPath(ctx);
+	if (path == NULL) return;
+	path->closed = 1;
+}
+
+static void nvg__pathWinding(NVGcontext* ctx, int winding)
+{
+	NVGpath* path = nvg__lastPath(ctx);
+	if (path == NULL) return;
+	path->winding = winding;
+}
+
+static float nvg__getAverageScale(float *t)
+{
+	float sx = sqrtf(t[0]*t[0] + t[2]*t[2]);
+	float sy = sqrtf(t[1]*t[1] + t[3]*t[3]);
+	return (sx + sy) * 0.5f;
+}
+
+static NVGvertex* nvg__allocTempVerts(NVGcontext* ctx, int nverts)
+{
+	if (nverts > ctx->cache->cverts) {
+		NVGvertex* verts;
+		int cverts = (nverts + 0xff) & ~0xff; // Round up to prevent allocations when things change just slightly.
+		verts = (NVGvertex*)realloc(ctx->cache->verts, sizeof(NVGvertex)*cverts);
+		if (verts == NULL) return NULL;
+		ctx->cache->verts = verts;
+		ctx->cache->cverts = cverts;
+	}
+
+	return ctx->cache->verts;
+}
+
+static float nvg__triarea2(float ax, float ay, float bx, float by, float cx, float cy)
+{
+	float abx = bx - ax;
+	float aby = by - ay;
+	float acx = cx - ax;
+	float acy = cy - ay;
+	return acx*aby - abx*acy;
+}
+
+static float nvg__polyArea(NVGpoint* pts, int npts)
+{
+	int i;
+	float area = 0;
+	for (i = 2; i < npts; i++) {
+		NVGpoint* a = &pts[0];
+		NVGpoint* b = &pts[i-1];
+		NVGpoint* c = &pts[i];
+		area += nvg__triarea2(a->x,a->y, b->x,b->y, c->x,c->y);
+	}
+	return area * 0.5f;
+}
+
+static void nvg__polyReverse(NVGpoint* pts, int npts)
+{
+	NVGpoint tmp;
+	int i = 0, j = npts-1;
+	while (i < j) {
+		tmp = pts[i];
+		pts[i] = pts[j];
+		pts[j] = tmp;
+		i++;
+		j--;
+	}
+}
+
+
+static void nvg__vset(NVGvertex* vtx, float x, float y, float u, float v)
+{
+	vtx->x = x;
+	vtx->y = y;
+	vtx->u = u;
+	vtx->v = v;
+}
+
+static void nvg__tesselateBezier(NVGcontext* ctx,
+								 float x1, float y1, float x2, float y2,
+								 float x3, float y3, float x4, float y4,
+								 int level, int type)
+{
+	float x12,y12,x23,y23,x34,y34,x123,y123,x234,y234,x1234,y1234;
+	float dx,dy,d2,d3;
+
+	if (level > 10) return;
+
+	x12 = (x1+x2)*0.5f;
+	y12 = (y1+y2)*0.5f;
+	x23 = (x2+x3)*0.5f;
+	y23 = (y2+y3)*0.5f;
+	x34 = (x3+x4)*0.5f;
+	y34 = (y3+y4)*0.5f;
+	x123 = (x12+x23)*0.5f;
+	y123 = (y12+y23)*0.5f;
+
+	dx = x4 - x1;
+	dy = y4 - y1;
+	d2 = nvg__absf(((x2 - x4) * dy - (y2 - y4) * dx));
+	d3 = nvg__absf(((x3 - x4) * dy - (y3 - y4) * dx));
+
+	if ((d2 + d3)*(d2 + d3) < ctx->tessTol * (dx*dx + dy*dy)) {
+		nvg__addPoint(ctx, x4, y4, type);
+		return;
+	}
+
+/*	if (nvg__absf(x1+x3-x2-x2) + nvg__absf(y1+y3-y2-y2) + nvg__absf(x2+x4-x3-x3) + nvg__absf(y2+y4-y3-y3) < ctx->tessTol) {
+		nvg__addPoint(ctx, x4, y4, type);
+		return;
+	}*/
+
+	x234 = (x23+x34)*0.5f;
+	y234 = (y23+y34)*0.5f;
+	x1234 = (x123+x234)*0.5f;
+	y1234 = (y123+y234)*0.5f;
+
+	nvg__tesselateBezier(ctx, x1,y1, x12,y12, x123,y123, x1234,y1234, level+1, 0);
+	nvg__tesselateBezier(ctx, x1234,y1234, x234,y234, x34,y34, x4,y4, level+1, type);
+}
+
+static void nvg__flattenPaths(NVGcontext* ctx)
+{
+	NVGpathCache* cache = ctx->cache;
+//	NVGstate* state = nvg__getState(ctx);
+	NVGpoint* last;
+	NVGpoint* p0;
+	NVGpoint* p1;
+	NVGpoint* pts;
+	NVGpath* path;
+	int i, j;
+	float* cp1;
+	float* cp2;
+	float* p;
+	float area;
+
+	if (cache->npaths > 0)
+		return;
+
+	// Flatten
+	i = 0;
+	while (i < ctx->ncommands) {
+		int cmd = (int)ctx->commands[i];
+		switch (cmd) {
+		case NVG_MOVETO:
+			nvg__addPath(ctx);
+			p = &ctx->commands[i+1];
+			nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
+			i += 3;
+			break;
+		case NVG_LINETO:
+			p = &ctx->commands[i+1];
+			nvg__addPoint(ctx, p[0], p[1], NVG_PT_CORNER);
+			i += 3;
+			break;
+		case NVG_BEZIERTO:
+			last = nvg__lastPoint(ctx);
+			if (last != NULL) {
+				cp1 = &ctx->commands[i+1];
+				cp2 = &ctx->commands[i+3];
+				p = &ctx->commands[i+5];
+				nvg__tesselateBezier(ctx, last->x,last->y, cp1[0],cp1[1], cp2[0],cp2[1], p[0],p[1], 0, NVG_PT_CORNER);
+			}
+			i += 7;
+			break;
+		case NVG_CLOSE:
+			nvg__closePath(ctx);
+			i++;
+			break;
+		case NVG_WINDING:
+			nvg__pathWinding(ctx, (int)ctx->commands[i+1]);
+			i += 2;
+			break;
+		default:
+			i++;
+		}
+	}
+
+	cache->bounds[0] = cache->bounds[1] = 1e6f;
+	cache->bounds[2] = cache->bounds[3] = -1e6f;
+
+	// Calculate the direction and length of line segments.
+	for (j = 0; j < cache->npaths; j++) {
+		path = &cache->paths[j];
+		pts = &cache->points[path->first];
+
+		// If the first and last points are the same, remove the last, mark as closed path.
+		p0 = &pts[path->count-1];
+		p1 = &pts[0];
+		if (nvg__ptEquals(p0->x,p0->y, p1->x,p1->y, ctx->distTol)) {
+			path->count--;
+			p0 = &pts[path->count-1];
+			path->closed = 1;
+		}
+
+		// Enforce winding.
+		if (path->count > 2) {
+			area = nvg__polyArea(pts, path->count);
+			if (path->winding == NVG_CCW && area < 0.0f)
+				nvg__polyReverse(pts, path->count);
+			if (path->winding == NVG_CW && area > 0.0f)
+				nvg__polyReverse(pts, path->count);
+		}
+
+		for(i = 0; i < path->count; i++) {
+			// Calculate segment direction and length
+			p0->dx = p1->x - p0->x;
+			p0->dy = p1->y - p0->y;
+			p0->len = nvg__normalize(&p0->dx, &p0->dy);
+			// Update bounds
+			cache->bounds[0] = nvg__minf(cache->bounds[0], p0->x);
+			cache->bounds[1] = nvg__minf(cache->bounds[1], p0->y);
+			cache->bounds[2] = nvg__maxf(cache->bounds[2], p0->x);
+			cache->bounds[3] = nvg__maxf(cache->bounds[3], p0->y);
+			// Advance
+			p0 = p1++;
+		}
+	}
+}
+
+static int nvg__curveDivs(float r, float arc, float tol)
+{
+	float da = acosf(r / (r + tol)) * 2.0f;
+	return nvg__maxi(2, (int)ceilf(arc / da));
+}
+
+static void nvg__chooseBevel(int bevel, NVGpoint* p0, NVGpoint* p1, float w,
+							float* x0, float* y0, float* x1, float* y1)
+{
+	if (bevel) {
+		*x0 = p1->x + p0->dy * w;
+		*y0 = p1->y - p0->dx * w;
+		*x1 = p1->x + p1->dy * w;
+		*y1 = p1->y - p1->dx * w;
+	} else {
+		*x0 = p1->x + p1->dmx * w;
+		*y0 = p1->y + p1->dmy * w;
+		*x1 = p1->x + p1->dmx * w;
+		*y1 = p1->y + p1->dmy * w;
+	}
+}
+
+static NVGvertex* nvg__roundJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1,
+								 float lw, float rw, float lu, float ru, int ncap,
+								 float fringe)
+{
+	int i, n;
+	float dlx0 = p0->dy;
+	float dly0 = -p0->dx;
+	float dlx1 = p1->dy;
+	float dly1 = -p1->dx;
+	NVG_NOTUSED(fringe);
+
+	if (p1->flags & NVG_PT_LEFT) {
+		float lx0,ly0,lx1,ly1,a0,a1;
+		nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
+		a0 = atan2f(-dly0, -dlx0);
+		a1 = atan2f(-dly1, -dlx1);
+		if (a1 > a0) a1 -= NVG_PI*2;
+
+		nvg__vset(dst, lx0, ly0, lu,1); dst++;
+		nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
+
+		n = nvg__clampi((int)ceilf(((a0 - a1) / NVG_PI) * ncap), 2, ncap);
+		for (i = 0; i < n; i++) {
+			float u = i/(float)(n-1);
+			float a = a0 + u*(a1-a0);
+			float rx = p1->x + cosf(a) * rw;
+			float ry = p1->y + sinf(a) * rw;
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+			nvg__vset(dst, rx, ry, ru,1); dst++;
+		}
+
+		nvg__vset(dst, lx1, ly1, lu,1); dst++;
+		nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
+
+	} else {
+		float rx0,ry0,rx1,ry1,a0,a1;
+		nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
+		a0 = atan2f(dly0, dlx0);
+		a1 = atan2f(dly1, dlx1);
+		if (a1 < a0) a1 += NVG_PI*2;
+
+		nvg__vset(dst, p1->x + dlx0*rw, p1->y + dly0*rw, lu,1); dst++;
+		nvg__vset(dst, rx0, ry0, ru,1); dst++;
+
+		n = nvg__clampi((int)ceilf(((a1 - a0) / NVG_PI) * ncap), 2, ncap);
+		for (i = 0; i < n; i++) {
+			float u = i/(float)(n-1);
+			float a = a0 + u*(a1-a0);
+			float lx = p1->x + cosf(a) * lw;
+			float ly = p1->y + sinf(a) * lw;
+			nvg__vset(dst, lx, ly, lu,1); dst++;
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+		}
+
+		nvg__vset(dst, p1->x + dlx1*rw, p1->y + dly1*rw, lu,1); dst++;
+		nvg__vset(dst, rx1, ry1, ru,1); dst++;
+
+	}
+	return dst;
+}
+
+static NVGvertex* nvg__bevelJoin(NVGvertex* dst, NVGpoint* p0, NVGpoint* p1,
+										float lw, float rw, float lu, float ru, float fringe)
+{
+	float rx0,ry0,rx1,ry1;
+	float lx0,ly0,lx1,ly1;
+	float dlx0 = p0->dy;
+	float dly0 = -p0->dx;
+	float dlx1 = p1->dy;
+	float dly1 = -p1->dx;
+	NVG_NOTUSED(fringe);
+
+	if (p1->flags & NVG_PT_LEFT) {
+		nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, lw, &lx0,&ly0, &lx1,&ly1);
+
+		nvg__vset(dst, lx0, ly0, lu,1); dst++;
+		nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
+
+		if (p1->flags & NVG_PT_BEVEL) {
+			nvg__vset(dst, lx0, ly0, lu,1); dst++;
+			nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
+
+			nvg__vset(dst, lx1, ly1, lu,1); dst++;
+			nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
+		} else {
+			rx0 = p1->x - p1->dmx * rw;
+			ry0 = p1->y - p1->dmy * rw;
+
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+			nvg__vset(dst, p1->x - dlx0*rw, p1->y - dly0*rw, ru,1); dst++;
+
+			nvg__vset(dst, rx0, ry0, ru,1); dst++;
+			nvg__vset(dst, rx0, ry0, ru,1); dst++;
+
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+			nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
+		}
+
+		nvg__vset(dst, lx1, ly1, lu,1); dst++;
+		nvg__vset(dst, p1->x - dlx1*rw, p1->y - dly1*rw, ru,1); dst++;
+
+	} else {
+		nvg__chooseBevel(p1->flags & NVG_PR_INNERBEVEL, p0, p1, -rw, &rx0,&ry0, &rx1,&ry1);
+
+		nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
+		nvg__vset(dst, rx0, ry0, ru,1); dst++;
+
+		if (p1->flags & NVG_PT_BEVEL) {
+			nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
+			nvg__vset(dst, rx0, ry0, ru,1); dst++;
+
+			nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
+			nvg__vset(dst, rx1, ry1, ru,1); dst++;
+		} else {
+			lx0 = p1->x + p1->dmx * lw;
+			ly0 = p1->y + p1->dmy * lw;
+
+			nvg__vset(dst, p1->x + dlx0*lw, p1->y + dly0*lw, lu,1); dst++;
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+
+			nvg__vset(dst, lx0, ly0, lu,1); dst++;
+			nvg__vset(dst, lx0, ly0, lu,1); dst++;
+
+			nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
+			nvg__vset(dst, p1->x, p1->y, 0.5f,1); dst++;
+		}
+
+		nvg__vset(dst, p1->x + dlx1*lw, p1->y + dly1*lw, lu,1); dst++;
+		nvg__vset(dst, rx1, ry1, ru,1); dst++;
+	}
+
+	return dst;
+}
+
+static NVGvertex* nvg__buttCapStart(NVGvertex* dst, NVGpoint* p,
+									float dx, float dy, float w, float d,
+									float aa, float u0, float u1)
+{
+	float px = p->x - dx*d;
+	float py = p->y - dy*d;
+	float dlx = dy;
+	float dly = -dx;
+	nvg__vset(dst, px + dlx*w - dx*aa, py + dly*w - dy*aa, u0,0); dst++;
+	nvg__vset(dst, px - dlx*w - dx*aa, py - dly*w - dy*aa, u1,0); dst++;
+	nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++;
+	nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++;
+	return dst;
+}
+
+static NVGvertex* nvg__buttCapEnd(NVGvertex* dst, NVGpoint* p,
+								  float dx, float dy, float w, float d,
+								  float aa, float u0, float u1)
+{
+	float px = p->x + dx*d;
+	float py = p->y + dy*d;
+	float dlx = dy;
+	float dly = -dx;
+	nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++;
+	nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++;
+	nvg__vset(dst, px + dlx*w + dx*aa, py + dly*w + dy*aa, u0,0); dst++;
+	nvg__vset(dst, px - dlx*w + dx*aa, py - dly*w + dy*aa, u1,0); dst++;
+	return dst;
+}
+
+
+static NVGvertex* nvg__roundCapStart(NVGvertex* dst, NVGpoint* p,
+									 float dx, float dy, float w, int ncap,
+									 float aa, float u0, float u1)
+{
+	int i;
+	float px = p->x;
+	float py = p->y;
+	float dlx = dy;
+	float dly = -dx;
+	NVG_NOTUSED(aa);
+	for (i = 0; i < ncap; i++) {
+		float a = i/(float)(ncap-1)*NVG_PI;
+		float ax = cosf(a) * w, ay = sinf(a) * w;
+		nvg__vset(dst, px - dlx*ax - dx*ay, py - dly*ax - dy*ay, u0,1); dst++;
+		nvg__vset(dst, px, py, 0.5f,1); dst++;
+	}
+	nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++;
+	nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++;
+	return dst;
+}
+
+static NVGvertex* nvg__roundCapEnd(NVGvertex* dst, NVGpoint* p,
+								   float dx, float dy, float w, int ncap,
+								   float aa, float u0, float u1)
+{
+	int i;
+	float px = p->x;
+	float py = p->y;
+	float dlx = dy;
+	float dly = -dx;
+	NVG_NOTUSED(aa);
+	nvg__vset(dst, px + dlx*w, py + dly*w, u0,1); dst++;
+	nvg__vset(dst, px - dlx*w, py - dly*w, u1,1); dst++;
+	for (i = 0; i < ncap; i++) {
+		float a = i/(float)(ncap-1)*NVG_PI;
+		float ax = cosf(a) * w, ay = sinf(a) * w;
+		nvg__vset(dst, px, py, 0.5f,1); dst++;
+		nvg__vset(dst, px - dlx*ax + dx*ay, py - dly*ax + dy*ay, u0,1); dst++;
+	}
+	return dst;
+}
+
+
+static void nvg__calculateJoins(NVGcontext* ctx, float w, int lineJoin, float miterLimit)
+{
+	NVGpathCache* cache = ctx->cache;
+	int i, j;
+	float iw = 0.0f;
+
+	if (w > 0.0f) iw = 1.0f / w;
+
+	// Calculate which joins needs extra vertices to append, and gather vertex count.
+	for (i = 0; i < cache->npaths; i++) {
+		NVGpath* path = &cache->paths[i];
+		NVGpoint* pts = &cache->points[path->first];
+		NVGpoint* p0 = &pts[path->count-1];
+		NVGpoint* p1 = &pts[0];
+		int nleft = 0;
+
+		path->nbevel = 0;
+
+		for (j = 0; j < path->count; j++) {
+			float dlx0, dly0, dlx1, dly1, dmr2, cross, limit;
+			dlx0 = p0->dy;
+			dly0 = -p0->dx;
+			dlx1 = p1->dy;
+			dly1 = -p1->dx;
+			// Calculate extrusions
+			p1->dmx = (dlx0 + dlx1) * 0.5f;
+			p1->dmy = (dly0 + dly1) * 0.5f;
+			dmr2 = p1->dmx*p1->dmx + p1->dmy*p1->dmy;
+			if (dmr2 > 0.000001f) {
+				float scale = 1.0f / dmr2;
+				if (scale > 600.0f) {
+					scale = 600.0f;
+				}
+				p1->dmx *= scale;
+				p1->dmy *= scale;
+			}
+
+			// Clear flags, but keep the corner.
+			p1->flags = (p1->flags & NVG_PT_CORNER) ? NVG_PT_CORNER : 0;
+
+			// Keep track of left turns.
+			cross = p1->dx * p0->dy - p0->dx * p1->dy;
+			if (cross > 0.0f) {
+				nleft++;
+				p1->flags |= NVG_PT_LEFT;
+			}
+
+			// Calculate if we should use bevel or miter for inner join.
+			limit = nvg__maxf(1.01f, nvg__minf(p0->len, p1->len) * iw);
+			if ((dmr2 * limit*limit) < 1.0f)
+				p1->flags |= NVG_PR_INNERBEVEL;
+
+			// Check to see if the corner needs to be beveled.
+			if (p1->flags & NVG_PT_CORNER) {
+				if ((dmr2 * miterLimit*miterLimit) < 1.0f || lineJoin == NVG_BEVEL || lineJoin == NVG_ROUND) {
+					p1->flags |= NVG_PT_BEVEL;
+				}
+			}
+
+			if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0)
+				path->nbevel++;
+
+			p0 = p1++;
+		}
+
+		path->convex = (nleft == path->count) ? 1 : 0;
+	}
+}
+
+
+static int nvg__expandStroke(NVGcontext* ctx, float w, float fringe, int lineCap, int lineJoin, float miterLimit)
+{
+	NVGpathCache* cache = ctx->cache;
+	NVGvertex* verts;
+	NVGvertex* dst;
+	int cverts, i, j;
+	float aa = fringe;//ctx->fringeWidth;
+	float u0 = 0.0f, u1 = 1.0f;
+	int ncap = nvg__curveDivs(w, NVG_PI, ctx->tessTol);	// Calculate divisions per half circle.
+
+	w += aa * 0.5f;
+
+	// Disable the gradient used for antialiasing when antialiasing is not used.
+	if (aa == 0.0f) {
+		u0 = 0.5f;
+		u1 = 0.5f;
+	}
+
+	nvg__calculateJoins(ctx, w, lineJoin, miterLimit);
+
+	// Calculate max vertex usage.
+	cverts = 0;
+	for (i = 0; i < cache->npaths; i++) {
+		NVGpath* path = &cache->paths[i];
+		int loop = (path->closed == 0) ? 0 : 1;
+		if (lineJoin == NVG_ROUND)
+			cverts += (path->count + path->nbevel*(ncap+2) + 1) * 2; // plus one for loop
+		else
+			cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop
+		if (loop == 0) {
+			// space for caps
+			if (lineCap == NVG_ROUND) {
+				cverts += (ncap*2 + 2)*2;
+			} else {
+				cverts += (3+3)*2;
+			}
+		}
+	}
+
+	verts = nvg__allocTempVerts(ctx, cverts);
+	if (verts == NULL) return 0;
+
+	for (i = 0; i < cache->npaths; i++) {
+		NVGpath* path = &cache->paths[i];
+		NVGpoint* pts = &cache->points[path->first];
+		NVGpoint* p0;
+		NVGpoint* p1;
+		int s, e, loop;
+		float dx, dy;
+
+		path->fill = 0;
+		path->nfill = 0;
+
+		// Calculate fringe or stroke
+		loop = (path->closed == 0) ? 0 : 1;
+		dst = verts;
+		path->stroke = dst;
+
+		if (loop) {
+			// Looping
+			p0 = &pts[path->count-1];
+			p1 = &pts[0];
+			s = 0;
+			e = path->count;
+		} else {
+			// Add cap
+			p0 = &pts[0];
+			p1 = &pts[1];
+			s = 1;
+			e = path->count-1;
+		}
+
+		if (loop == 0) {
+			// Add cap
+			dx = p1->x - p0->x;
+			dy = p1->y - p0->y;
+			nvg__normalize(&dx, &dy);
+			if (lineCap == NVG_BUTT)
+				dst = nvg__buttCapStart(dst, p0, dx, dy, w, -aa*0.5f, aa, u0, u1);
+			else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE)
+				dst = nvg__buttCapStart(dst, p0, dx, dy, w, w-aa, aa, u0, u1);
+			else if (lineCap == NVG_ROUND)
+				dst = nvg__roundCapStart(dst, p0, dx, dy, w, ncap, aa, u0, u1);
+		}
+
+		for (j = s; j < e; ++j) {
+			if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) {
+				if (lineJoin == NVG_ROUND) {
+					dst = nvg__roundJoin(dst, p0, p1, w, w, u0, u1, ncap, aa);
+				} else {
+					dst = nvg__bevelJoin(dst, p0, p1, w, w, u0, u1, aa);
+				}
+			} else {
+				nvg__vset(dst, p1->x + (p1->dmx * w), p1->y + (p1->dmy * w), u0,1); dst++;
+				nvg__vset(dst, p1->x - (p1->dmx * w), p1->y - (p1->dmy * w), u1,1); dst++;
+			}
+			p0 = p1++;
+		}
+
+		if (loop) {
+			// Loop it
+			nvg__vset(dst, verts[0].x, verts[0].y, u0,1); dst++;
+			nvg__vset(dst, verts[1].x, verts[1].y, u1,1); dst++;
+		} else {
+			// Add cap
+			dx = p1->x - p0->x;
+			dy = p1->y - p0->y;
+			nvg__normalize(&dx, &dy);
+			if (lineCap == NVG_BUTT)
+				dst = nvg__buttCapEnd(dst, p1, dx, dy, w, -aa*0.5f, aa, u0, u1);
+			else if (lineCap == NVG_BUTT || lineCap == NVG_SQUARE)
+				dst = nvg__buttCapEnd(dst, p1, dx, dy, w, w-aa, aa, u0, u1);
+			else if (lineCap == NVG_ROUND)
+				dst = nvg__roundCapEnd(dst, p1, dx, dy, w, ncap, aa, u0, u1);
+		}
+
+		path->nstroke = (int)(dst - verts);
+
+		verts = dst;
+	}
+
+	return 1;
+}
+
+static int nvg__expandFill(NVGcontext* ctx, float w, int lineJoin, float miterLimit)
+{
+	NVGpathCache* cache = ctx->cache;
+	NVGvertex* verts;
+	NVGvertex* dst;
+	int cverts, convex, i, j;
+	float aa = ctx->fringeWidth;
+	int fringe = w > 0.0f;
+
+	nvg__calculateJoins(ctx, w, lineJoin, miterLimit);
+
+	// Calculate max vertex usage.
+	cverts = 0;
+	for (i = 0; i < cache->npaths; i++) {
+		NVGpath* path = &cache->paths[i];
+		cverts += path->count + path->nbevel + 1;
+		if (fringe)
+			cverts += (path->count + path->nbevel*5 + 1) * 2; // plus one for loop
+	}
+
+	verts = nvg__allocTempVerts(ctx, cverts);
+	if (verts == NULL) return 0;
+
+	convex = cache->npaths == 1 && cache->paths[0].convex;
+
+	for (i = 0; i < cache->npaths; i++) {
+		NVGpath* path = &cache->paths[i];
+		NVGpoint* pts = &cache->points[path->first];
+		NVGpoint* p0;
+		NVGpoint* p1;
+		float rw, lw, woff;
+		float ru, lu;
+
+		// Calculate shape vertices.
+		woff = 0.5f*aa;
+		dst = verts;
+		path->fill = dst;
+
+		if (fringe) {
+			// Looping
+			p0 = &pts[path->count-1];
+			p1 = &pts[0];
+			for (j = 0; j < path->count; ++j) {
+				if (p1->flags & NVG_PT_BEVEL) {
+					float dlx0 = p0->dy;
+					float dly0 = -p0->dx;
+					float dlx1 = p1->dy;
+					float dly1 = -p1->dx;
+					if (p1->flags & NVG_PT_LEFT) {
+						float lx = p1->x + p1->dmx * woff;
+						float ly = p1->y + p1->dmy * woff;
+						nvg__vset(dst, lx, ly, 0.5f,1); dst++;
+					} else {
+						float lx0 = p1->x + dlx0 * woff;
+						float ly0 = p1->y + dly0 * woff;
+						float lx1 = p1->x + dlx1 * woff;
+						float ly1 = p1->y + dly1 * woff;
+						nvg__vset(dst, lx0, ly0, 0.5f,1); dst++;
+						nvg__vset(dst, lx1, ly1, 0.5f,1); dst++;
+					}
+				} else {
+					nvg__vset(dst, p1->x + (p1->dmx * woff), p1->y + (p1->dmy * woff), 0.5f,1); dst++;
+				}
+				p0 = p1++;
+			}
+		} else {
+			for (j = 0; j < path->count; ++j) {
+				nvg__vset(dst, pts[j].x, pts[j].y, 0.5f,1);
+				dst++;
+			}
+		}
+
+		path->nfill = (int)(dst - verts);
+		verts = dst;
+
+		// Calculate fringe
+		if (fringe) {
+			lw = w + woff;
+			rw = w - woff;
+			lu = 0;
+			ru = 1;
+			dst = verts;
+			path->stroke = dst;
+
+			// Create only half a fringe for convex shapes so that
+			// the shape can be rendered without stenciling.
+			if (convex) {
+				lw = woff;	// This should generate the same vertex as fill inset above.
+				lu = 0.5f;	// Set outline fade at middle.
+			}
+
+			// Looping
+			p0 = &pts[path->count-1];
+			p1 = &pts[0];
+
+			for (j = 0; j < path->count; ++j) {
+				if ((p1->flags & (NVG_PT_BEVEL | NVG_PR_INNERBEVEL)) != 0) {
+					dst = nvg__bevelJoin(dst, p0, p1, lw, rw, lu, ru, ctx->fringeWidth);
+				} else {
+					nvg__vset(dst, p1->x + (p1->dmx * lw), p1->y + (p1->dmy * lw), lu,1); dst++;
+					nvg__vset(dst, p1->x - (p1->dmx * rw), p1->y - (p1->dmy * rw), ru,1); dst++;
+				}
+				p0 = p1++;
+			}
+
+			// Loop it
+			nvg__vset(dst, verts[0].x, verts[0].y, lu,1); dst++;
+			nvg__vset(dst, verts[1].x, verts[1].y, ru,1); dst++;
+
+			path->nstroke = (int)(dst - verts);
+			verts = dst;
+		} else {
+			path->stroke = NULL;
+			path->nstroke = 0;
+		}
+	}
+
+	return 1;
+}
+
+
+// Draw
+void nvgBeginPath(NVGcontext* ctx)
+{
+	ctx->ncommands = 0;
+	nvg__clearPathCache(ctx);
+}
+
+void nvgMoveTo(NVGcontext* ctx, float x, float y)
+{
+	float vals[] = { NVG_MOVETO, x, y };
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgLineTo(NVGcontext* ctx, float x, float y)
+{
+	float vals[] = { NVG_LINETO, x, y };
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y)
+{
+	float vals[] = { NVG_BEZIERTO, c1x, c1y, c2x, c2y, x, y };
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y)
+{
+    float x0 = ctx->commandx;
+    float y0 = ctx->commandy;
+    float vals[] = { NVG_BEZIERTO,
+        x0 + 2.0f/3.0f*(cx - x0), y0 + 2.0f/3.0f*(cy - y0),
+        x + 2.0f/3.0f*(cx - x), y + 2.0f/3.0f*(cy - y),
+        x, y };
+    nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius)
+{
+	float x0 = ctx->commandx;
+	float y0 = ctx->commandy;
+	float dx0,dy0, dx1,dy1, a, d, cx,cy, a0,a1;
+	int dir;
+
+	if (ctx->ncommands == 0) {
+		return;
+	}
+
+	// Handle degenerate cases.
+	if (nvg__ptEquals(x0,y0, x1,y1, ctx->distTol) ||
+		nvg__ptEquals(x1,y1, x2,y2, ctx->distTol) ||
+		nvg__distPtSeg(x1,y1, x0,y0, x2,y2) < ctx->distTol*ctx->distTol ||
+		radius < ctx->distTol) {
+		nvgLineTo(ctx, x1,y1);
+		return;
+	}
+
+	// Calculate tangential circle to lines (x0,y0)-(x1,y1) and (x1,y1)-(x2,y2).
+	dx0 = x0-x1;
+	dy0 = y0-y1;
+	dx1 = x2-x1;
+	dy1 = y2-y1;
+	nvg__normalize(&dx0,&dy0);
+	nvg__normalize(&dx1,&dy1);
+	a = nvg__acosf(dx0*dx1 + dy0*dy1);
+	d = radius / nvg__tanf(a/2.0f);
+
+//	printf("a=%f° d=%f\n", a/NVG_PI*180.0f, d);
+
+	if (d > 10000.0f) {
+		nvgLineTo(ctx, x1,y1);
+		return;
+	}
+
+	if (nvg__cross(dx0,dy0, dx1,dy1) > 0.0f) {
+		cx = x1 + dx0*d + dy0*radius;
+		cy = y1 + dy0*d + -dx0*radius;
+		a0 = nvg__atan2f(dx0, -dy0);
+		a1 = nvg__atan2f(-dx1, dy1);
+		dir = NVG_CW;
+//		printf("CW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
+	} else {
+		cx = x1 + dx0*d + -dy0*radius;
+		cy = y1 + dy0*d + dx0*radius;
+		a0 = nvg__atan2f(-dx0, dy0);
+		a1 = nvg__atan2f(dx1, -dy1);
+		dir = NVG_CCW;
+//		printf("CCW c=(%f, %f) a0=%f° a1=%f°\n", cx, cy, a0/NVG_PI*180.0f, a1/NVG_PI*180.0f);
+	}
+
+	nvgArc(ctx, cx, cy, radius, a0, a1, dir);
+}
+
+void nvgClosePath(NVGcontext* ctx)
+{
+	float vals[] = { NVG_CLOSE };
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgPathWinding(NVGcontext* ctx, int dir)
+{
+	float vals[] = { NVG_WINDING, (float)dir };
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgBarc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir, int join)
+{
+	float a = 0, da = 0, hda = 0, kappa = 0;
+	float dx = 0, dy = 0, x = 0, y = 0, tanx = 0, tany = 0;
+	float px = 0, py = 0, ptanx = 0, ptany = 0;
+	float vals[3 + 5*7 + 100];
+	int i, ndivs, nvals;
+	int move = join && ctx->ncommands > 0 ? NVG_LINETO : NVG_MOVETO;
+
+	// Clamp angles
+	da = a1 - a0;
+	if (dir == NVG_CW) {
+		if (nvg__absf(da) >= NVG_PI*2) {
+			da = NVG_PI*2;
+		} else {
+			while (da < 0.0f) da += NVG_PI*2;
+		}
+	} else {
+		if (nvg__absf(da) >= NVG_PI*2) {
+			da = -NVG_PI*2;
+		} else {
+			while (da > 0.0f) da -= NVG_PI*2;
+		}
+	}
+
+	// Split arc into max 90 degree segments.
+	ndivs = nvg__maxi(1, nvg__mini((int)(nvg__absf(da) / (NVG_PI*0.5f) + 0.5f), 5));
+	hda = (da / (float)ndivs) / 2.0f;
+	kappa = nvg__absf(4.0f / 3.0f * (1.0f - nvg__cosf(hda)) / nvg__sinf(hda));
+
+	if (dir == NVG_CCW)
+		kappa = -kappa;
+
+	nvals = 0;
+	for (i = 0; i <= ndivs; i++) {
+		a = a0 + da * (i/(float)ndivs);
+		dx = nvg__cosf(a);
+		dy = nvg__sinf(a);
+		x = cx + dx*r;
+		y = cy + dy*r;
+		tanx = -dy*r*kappa;
+		tany = dx*r*kappa;
+
+		if (i == 0) {
+			vals[nvals++] = (float)move;
+			vals[nvals++] = x;
+			vals[nvals++] = y;
+		} else {
+			vals[nvals++] = NVG_BEZIERTO;
+			vals[nvals++] = px+ptanx;
+			vals[nvals++] = py+ptany;
+			vals[nvals++] = x-tanx;
+			vals[nvals++] = y-tany;
+			vals[nvals++] = x;
+			vals[nvals++] = y;
+		}
+		px = x;
+		py = y;
+		ptanx = tanx;
+		ptany = tany;
+	}
+
+	nvg__appendCommands(ctx, vals, nvals);
+}
+
+void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir)
+{
+	nvgBarc(ctx, cx, cy, r, a0, a1, dir, 1);
+}
+
+void nvgRect(NVGcontext* ctx, float x, float y, float w, float h)
+{
+	float vals[] = {
+		NVG_MOVETO, x,y,
+		NVG_LINETO, x,y+h,
+		NVG_LINETO, x+w,y+h,
+		NVG_LINETO, x+w,y,
+		NVG_CLOSE
+	};
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r)
+{
+	nvgRoundedRectVarying(ctx, x, y, w, h, r, r, r, r);
+}
+
+void nvgRoundedRectVarying(NVGcontext* ctx, float x, float y, float w, float h, float radTopLeft, float radTopRight, float radBottomRight, float radBottomLeft)
+{
+	if(radTopLeft < 0.1f && radTopRight < 0.1f && radBottomRight < 0.1f && radBottomLeft < 0.1f) {
+		nvgRect(ctx, x, y, w, h);
+		return;
+	} else {
+		float halfw = nvg__absf(w)*0.5f;
+		float halfh = nvg__absf(h)*0.5f;
+		float rxBL = nvg__minf(radBottomLeft, halfw) * nvg__signf(w), ryBL = nvg__minf(radBottomLeft, halfh) * nvg__signf(h);
+		float rxBR = nvg__minf(radBottomRight, halfw) * nvg__signf(w), ryBR = nvg__minf(radBottomRight, halfh) * nvg__signf(h);
+		float rxTR = nvg__minf(radTopRight, halfw) * nvg__signf(w), ryTR = nvg__minf(radTopRight, halfh) * nvg__signf(h);
+		float rxTL = nvg__minf(radTopLeft, halfw) * nvg__signf(w), ryTL = nvg__minf(radTopLeft, halfh) * nvg__signf(h);
+		float vals[] = {
+			NVG_MOVETO, x, y + ryTL,
+			NVG_LINETO, x, y + h - ryBL,
+			NVG_BEZIERTO, x, y + h - ryBL*(1 - NVG_KAPPA90), x + rxBL*(1 - NVG_KAPPA90), y + h, x + rxBL, y + h,
+			NVG_LINETO, x + w - rxBR, y + h,
+			NVG_BEZIERTO, x + w - rxBR*(1 - NVG_KAPPA90), y + h, x + w, y + h - ryBR*(1 - NVG_KAPPA90), x + w, y + h - ryBR,
+			NVG_LINETO, x + w, y + ryTR,
+			NVG_BEZIERTO, x + w, y + ryTR*(1 - NVG_KAPPA90), x + w - rxTR*(1 - NVG_KAPPA90), y, x + w - rxTR, y,
+			NVG_LINETO, x + rxTL, y,
+			NVG_BEZIERTO, x + rxTL*(1 - NVG_KAPPA90), y, x, y + ryTL*(1 - NVG_KAPPA90), x, y + ryTL,
+			NVG_CLOSE
+		};
+		nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+	}
+}
+
+void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry)
+{
+	float vals[] = {
+		NVG_MOVETO, cx-rx, cy,
+		NVG_BEZIERTO, cx-rx, cy+ry*NVG_KAPPA90, cx-rx*NVG_KAPPA90, cy+ry, cx, cy+ry,
+		NVG_BEZIERTO, cx+rx*NVG_KAPPA90, cy+ry, cx+rx, cy+ry*NVG_KAPPA90, cx+rx, cy,
+		NVG_BEZIERTO, cx+rx, cy-ry*NVG_KAPPA90, cx+rx*NVG_KAPPA90, cy-ry, cx, cy-ry,
+		NVG_BEZIERTO, cx-rx*NVG_KAPPA90, cy-ry, cx-rx, cy-ry*NVG_KAPPA90, cx-rx, cy,
+		NVG_CLOSE
+	};
+	nvg__appendCommands(ctx, vals, NVG_COUNTOF(vals));
+}
+
+void nvgCircle(NVGcontext* ctx, float cx, float cy, float r)
+{
+	nvgEllipse(ctx, cx,cy, r,r);
+}
+
+void nvgDebugDumpPathCache(NVGcontext* ctx)
+{
+	const NVGpath* path;
+	int i, j;
+
+	printf("Dumping %d cached paths\n", ctx->cache->npaths);
+	for (i = 0; i < ctx->cache->npaths; i++) {
+		path = &ctx->cache->paths[i];
+		printf(" - Path %d\n", i);
+		if (path->nfill) {
+			printf("   - fill: %d\n", path->nfill);
+			for (j = 0; j < path->nfill; j++)
+				printf("%f\t%f\n", path->fill[j].x, path->fill[j].y);
+		}
+		if (path->nstroke) {
+			printf("   - stroke: %d\n", path->nstroke);
+			for (j = 0; j < path->nstroke; j++)
+				printf("%f\t%f\n", path->stroke[j].x, path->stroke[j].y);
+		}
+	}
+}
+
+void nvgFill(NVGcontext* ctx)
+{
+	NVGstate* state = nvg__getState(ctx);
+	const NVGpath* path;
+	NVGpaint fillPaint = state->fill;
+	int i;
+
+	nvg__flattenPaths(ctx);
+	if (ctx->params.edgeAntiAlias && state->shapeAntiAlias)
+		nvg__expandFill(ctx, ctx->fringeWidth, NVG_MITER, 2.4f);
+	else
+		nvg__expandFill(ctx, 0.0f, NVG_MITER, 2.4f);
+
+	// Apply global alpha
+	fillPaint.innerColor.a *= state->alpha;
+	fillPaint.outerColor.a *= state->alpha;
+
+	ctx->params.renderFill(ctx->params.userPtr, &fillPaint, state->compositeOperation, &state->scissor, ctx->fringeWidth,
+						   ctx->cache->bounds, ctx->cache->paths, ctx->cache->npaths);
+
+	// Count triangles
+	for (i = 0; i < ctx->cache->npaths; i++) {
+		path = &ctx->cache->paths[i];
+		ctx->fillTriCount += path->nfill-2;
+		ctx->fillTriCount += path->nstroke-2;
+		ctx->drawCallCount += 2;
+	}
+}
+
+void nvgStroke(NVGcontext* ctx)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float scale = nvg__getAverageScale(state->xform);
+	float strokeWidth = nvg__clampf(state->strokeWidth * scale, 0.0f, 200.0f);
+	NVGpaint strokePaint = state->stroke;
+	const NVGpath* path;
+	int i;
+
+
+	if (strokeWidth < ctx->fringeWidth) {
+		// If the stroke width is less than pixel size, use alpha to emulate coverage.
+		// Since coverage is area, scale by alpha*alpha.
+		float alpha = nvg__clampf(strokeWidth / ctx->fringeWidth, 0.0f, 1.0f);
+		strokePaint.innerColor.a *= alpha*alpha;
+		strokePaint.outerColor.a *= alpha*alpha;
+		strokeWidth = ctx->fringeWidth;
+	}
+
+	// Apply global alpha
+	strokePaint.innerColor.a *= state->alpha;
+	strokePaint.outerColor.a *= state->alpha;
+
+	nvg__flattenPaths(ctx);
+
+	if (ctx->params.edgeAntiAlias && state->shapeAntiAlias)
+		nvg__expandStroke(ctx, strokeWidth*0.5f, ctx->fringeWidth, state->lineCap, state->lineJoin, state->miterLimit);
+	else
+		nvg__expandStroke(ctx, strokeWidth*0.5f, 0.0f, state->lineCap, state->lineJoin, state->miterLimit);
+
+	ctx->params.renderStroke(ctx->params.userPtr, &strokePaint, state->compositeOperation, &state->scissor, ctx->fringeWidth,
+							 strokeWidth, ctx->cache->paths, ctx->cache->npaths);
+
+	// Count triangles
+	for (i = 0; i < ctx->cache->npaths; i++) {
+		path = &ctx->cache->paths[i];
+		ctx->strokeTriCount += path->nstroke-2;
+		ctx->drawCallCount++;
+	}
+}
+
+// Add fonts
+int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename)
+{
+	return fonsAddFont(ctx->fs, name, filename, 0);
+}
+
+int nvgCreateFontAtIndex(NVGcontext* ctx, const char* name, const char* filename, const int fontIndex)
+{
+	return fonsAddFont(ctx->fs, name, filename, fontIndex);
+}
+
+int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData)
+{
+	return fonsAddFontMem(ctx->fs, name, data, ndata, freeData, 0);
+}
+
+int nvgCreateFontMemAtIndex(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData, const int fontIndex)
+{
+	return fonsAddFontMem(ctx->fs, name, data, ndata, freeData, fontIndex);
+}
+
+int nvgFindFont(NVGcontext* ctx, const char* name)
+{
+	if (name == NULL) return -1;
+	return fonsGetFontByName(ctx->fs, name);
+}
+
+
+int nvgAddFallbackFontId(NVGcontext* ctx, int baseFont, int fallbackFont)
+{
+	if(baseFont == -1 || fallbackFont == -1) return 0;
+	return fonsAddFallbackFont(ctx->fs, baseFont, fallbackFont);
+}
+
+int nvgAddFallbackFont(NVGcontext* ctx, const char* baseFont, const char* fallbackFont)
+{
+	return nvgAddFallbackFontId(ctx, nvgFindFont(ctx, baseFont), nvgFindFont(ctx, fallbackFont));
+}
+
+void nvgResetFallbackFontsId(NVGcontext* ctx, int baseFont)
+{
+	fonsResetFallbackFont(ctx->fs, baseFont);
+}
+
+void nvgResetFallbackFonts(NVGcontext* ctx, const char* baseFont)
+{
+	nvgResetFallbackFontsId(ctx, nvgFindFont(ctx, baseFont));
+}
+
+// State setting
+void nvgFontSize(NVGcontext* ctx, float size)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->fontSize = size;
+}
+
+void nvgFontBlur(NVGcontext* ctx, float blur)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->fontBlur = blur;
+}
+
+void nvgTextLetterSpacing(NVGcontext* ctx, float spacing)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->letterSpacing = spacing;
+}
+
+void nvgTextLineHeight(NVGcontext* ctx, float lineHeight)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->lineHeight = lineHeight;
+}
+
+void nvgTextAlign(NVGcontext* ctx, int align)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->textAlign = align;
+}
+
+void nvgFontFaceId(NVGcontext* ctx, int font)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->fontId = font;
+}
+
+void nvgFontFace(NVGcontext* ctx, const char* font)
+{
+	NVGstate* state = nvg__getState(ctx);
+	state->fontId = fonsGetFontByName(ctx->fs, font);
+}
+
+static float nvg__quantize(float a, float d)
+{
+	return ((int)(a / d + 0.5f)) * d;
+}
+
+static float nvg__getFontScale(NVGstate* state)
+{
+	return nvg__minf(nvg__quantize(nvg__getAverageScale(state->xform), 0.01f), 4.0f);
+}
+
+static void nvg__flushTextTexture(NVGcontext* ctx)
+{
+	int dirty[4];
+
+	if (fonsValidateTexture(ctx->fs, dirty)) {
+		int fontImage = ctx->fontImages[ctx->fontImageIdx];
+		// Update texture
+		if (fontImage != 0) {
+			int iw, ih;
+			const unsigned char* data = fonsGetTextureData(ctx->fs, &iw, &ih);
+			int x = dirty[0];
+			int y = dirty[1];
+			int w = dirty[2] - dirty[0];
+			int h = dirty[3] - dirty[1];
+			ctx->params.renderUpdateTexture(ctx->params.userPtr, fontImage, x,y, w,h, data);
+		}
+	}
+}
+
+static int nvg__allocTextAtlas(NVGcontext* ctx)
+{
+	int iw, ih;
+	nvg__flushTextTexture(ctx);
+	if (ctx->fontImageIdx >= NVG_MAX_FONTIMAGES-1)
+		return 0;
+	// if next fontImage already have a texture
+	if (ctx->fontImages[ctx->fontImageIdx+1] != 0)
+		nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx+1], &iw, &ih);
+	else { // calculate the new font image size and create it.
+		nvgImageSize(ctx, ctx->fontImages[ctx->fontImageIdx], &iw, &ih);
+		if (iw > ih)
+			ih *= 2;
+		else
+			iw *= 2;
+		if (iw > NVG_MAX_FONTIMAGE_SIZE || ih > NVG_MAX_FONTIMAGE_SIZE)
+			iw = ih = NVG_MAX_FONTIMAGE_SIZE;
+		ctx->fontImages[ctx->fontImageIdx+1] = ctx->params.renderCreateTexture(ctx->params.userPtr, NVG_TEXTURE_ALPHA, iw, ih, 0, NULL);
+	}
+	++ctx->fontImageIdx;
+	fonsResetAtlas(ctx->fs, iw, ih);
+	return 1;
+}
+
+static void nvg__renderText(NVGcontext* ctx, NVGvertex* verts, int nverts)
+{
+	NVGstate* state = nvg__getState(ctx);
+	NVGpaint paint = state->fill;
+
+	// Render triangles.
+	paint.image = ctx->fontImages[ctx->fontImageIdx];
+
+	// Apply global alpha
+	paint.innerColor.a *= state->alpha;
+	paint.outerColor.a *= state->alpha;
+
+	ctx->params.renderTriangles(ctx->params.userPtr, &paint, state->compositeOperation, &state->scissor, verts, nverts, ctx->fringeWidth);
+
+	ctx->drawCallCount++;
+	ctx->textTriCount += nverts/3;
+}
+
+static int nvg__isTransformFlipped(const float *xform)
+{
+	float det = xform[0] * xform[3] - xform[2] * xform[1];
+	return( det < 0);
+}
+
+float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end)
+{
+	NVGstate* state = nvg__getState(ctx);
+	FONStextIter iter, prevIter;
+	FONSquad q;
+	NVGvertex* verts;
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+	int cverts = 0;
+	int nverts = 0;
+	int isFlipped = nvg__isTransformFlipped(state->xform);
+
+	if (end == NULL)
+		end = string + strlen(string);
+
+	if (state->fontId == FONS_INVALID) return x;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+
+	cverts = nvg__maxi(2, (int)(end - string)) * 6; // conservative estimate.
+	verts = nvg__allocTempVerts(ctx, cverts);
+	if (verts == NULL) return x;
+
+	fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end, FONS_GLYPH_BITMAP_REQUIRED);
+	prevIter = iter;
+	while (fonsTextIterNext(ctx->fs, &iter, &q)) {
+		float c[4*2];
+		if (iter.prevGlyphIndex == -1) { // can not retrieve glyph?
+			if (nverts != 0) {
+				nvg__renderText(ctx, verts, nverts);
+				nverts = 0;
+			}
+			if (!nvg__allocTextAtlas(ctx))
+				break; // no memory :(
+			iter = prevIter;
+			fonsTextIterNext(ctx->fs, &iter, &q); // try again
+			if (iter.prevGlyphIndex == -1) // still can not find glyph?
+				break;
+		}
+		prevIter = iter;
+		if(isFlipped) {
+			float tmp;
+
+			tmp = q.y0; q.y0 = q.y1; q.y1 = tmp;
+			tmp = q.t0; q.t0 = q.t1; q.t1 = tmp;
+		}
+		// Transform corners.
+		nvgTransformPoint(&c[0],&c[1], state->xform, q.x0*invscale, q.y0*invscale);
+		nvgTransformPoint(&c[2],&c[3], state->xform, q.x1*invscale, q.y0*invscale);
+		nvgTransformPoint(&c[4],&c[5], state->xform, q.x1*invscale, q.y1*invscale);
+		nvgTransformPoint(&c[6],&c[7], state->xform, q.x0*invscale, q.y1*invscale);
+		// Create triangles
+		if (nverts+6 <= cverts) {
+			nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
+			nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
+			nvg__vset(&verts[nverts], c[2], c[3], q.s1, q.t0); nverts++;
+			nvg__vset(&verts[nverts], c[0], c[1], q.s0, q.t0); nverts++;
+			nvg__vset(&verts[nverts], c[6], c[7], q.s0, q.t1); nverts++;
+			nvg__vset(&verts[nverts], c[4], c[5], q.s1, q.t1); nverts++;
+		}
+	}
+
+	// TODO: add back-end bit to do this just once per frame.
+	nvg__flushTextTexture(ctx);
+
+	nvg__renderText(ctx, verts, nverts);
+
+	return iter.nextx / scale;
+}
+
+void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end)
+{
+	NVGstate* state = nvg__getState(ctx);
+	NVGtextRow rows[2];
+	int nrows = 0, i;
+	int oldAlign = state->textAlign;
+	int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
+	int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
+	float lineh = 0;
+
+	if (state->fontId == FONS_INVALID) return;
+
+	nvgTextMetrics(ctx, NULL, NULL, &lineh);
+
+	state->textAlign = NVG_ALIGN_LEFT | valign;
+
+	while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
+		for (i = 0; i < nrows; i++) {
+			NVGtextRow* row = &rows[i];
+			if (haling & NVG_ALIGN_LEFT)
+				nvgText(ctx, x, y, row->start, row->end);
+			else if (haling & NVG_ALIGN_CENTER)
+				nvgText(ctx, x + breakRowWidth*0.5f - row->width*0.5f, y, row->start, row->end);
+			else if (haling & NVG_ALIGN_RIGHT)
+				nvgText(ctx, x + breakRowWidth - row->width, y, row->start, row->end);
+			y += lineh * state->lineHeight;
+		}
+		string = rows[nrows-1].next;
+	}
+
+	state->textAlign = oldAlign;
+}
+
+int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+	FONStextIter iter, prevIter;
+	FONSquad q;
+	int npos = 0;
+
+	if (state->fontId == FONS_INVALID) return 0;
+
+	if (end == NULL)
+		end = string + strlen(string);
+
+	if (string == end)
+		return 0;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+
+	fonsTextIterInit(ctx->fs, &iter, x*scale, y*scale, string, end, FONS_GLYPH_BITMAP_OPTIONAL);
+	prevIter = iter;
+	while (fonsTextIterNext(ctx->fs, &iter, &q)) {
+		if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph?
+			iter = prevIter;
+			fonsTextIterNext(ctx->fs, &iter, &q); // try again
+		}
+		prevIter = iter;
+		positions[npos].str = iter.str;
+		positions[npos].x = iter.x * invscale;
+		positions[npos].minx = nvg__minf(iter.x, q.x0) * invscale;
+		positions[npos].maxx = nvg__maxf(iter.nextx, q.x1) * invscale;
+		npos++;
+		if (npos >= maxPositions)
+			break;
+	}
+
+	return npos;
+}
+
+enum NVGcodepointType {
+	NVG_SPACE,
+	NVG_NEWLINE,
+	NVG_CHAR,
+	NVG_CJK_CHAR,
+};
+
+int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+	FONStextIter iter, prevIter;
+	FONSquad q;
+	int nrows = 0;
+	float rowStartX = 0;
+	float rowWidth = 0;
+	float rowMinX = 0;
+	float rowMaxX = 0;
+	const char* rowStart = NULL;
+	const char* rowEnd = NULL;
+	const char* wordStart = NULL;
+	float wordStartX = 0;
+	float wordMinX = 0;
+	const char* breakEnd = NULL;
+	float breakWidth = 0;
+	float breakMaxX = 0;
+	int type = NVG_SPACE, ptype = NVG_SPACE;
+	unsigned int pcodepoint = 0;
+
+	if (maxRows == 0) return 0;
+	if (state->fontId == FONS_INVALID) return 0;
+
+	if (end == NULL)
+		end = string + strlen(string);
+
+	if (string == end) return 0;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+
+	breakRowWidth *= scale;
+
+	fonsTextIterInit(ctx->fs, &iter, 0, 0, string, end, FONS_GLYPH_BITMAP_OPTIONAL);
+	prevIter = iter;
+	while (fonsTextIterNext(ctx->fs, &iter, &q)) {
+		if (iter.prevGlyphIndex < 0 && nvg__allocTextAtlas(ctx)) { // can not retrieve glyph?
+			iter = prevIter;
+			fonsTextIterNext(ctx->fs, &iter, &q); // try again
+		}
+		prevIter = iter;
+		switch (iter.codepoint) {
+			case 9:			// \t
+			case 11:		// \v
+			case 12:		// \f
+			case 32:		// space
+			case 0x00a0:	// NBSP
+				type = NVG_SPACE;
+				break;
+			case 10:		// \n
+				type = pcodepoint == 13 ? NVG_SPACE : NVG_NEWLINE;
+				break;
+			case 13:		// \r
+				type = pcodepoint == 10 ? NVG_SPACE : NVG_NEWLINE;
+				break;
+			case 0x0085:	// NEL
+				type = NVG_NEWLINE;
+				break;
+			default:
+				if ((iter.codepoint >= 0x4E00 && iter.codepoint <= 0x9FFF) ||
+					(iter.codepoint >= 0x3000 && iter.codepoint <= 0x30FF) ||
+					(iter.codepoint >= 0xFF00 && iter.codepoint <= 0xFFEF) ||
+					(iter.codepoint >= 0x1100 && iter.codepoint <= 0x11FF) ||
+					(iter.codepoint >= 0x3130 && iter.codepoint <= 0x318F) ||
+					(iter.codepoint >= 0xAC00 && iter.codepoint <= 0xD7AF))
+					type = NVG_CJK_CHAR;
+				else
+					type = NVG_CHAR;
+				break;
+		}
+
+		if (type == NVG_NEWLINE) {
+			// Always handle new lines.
+			rows[nrows].start = rowStart != NULL ? rowStart : iter.str;
+			rows[nrows].end = rowEnd != NULL ? rowEnd : iter.str;
+			rows[nrows].width = rowWidth * invscale;
+			rows[nrows].minx = rowMinX * invscale;
+			rows[nrows].maxx = rowMaxX * invscale;
+			rows[nrows].next = iter.next;
+			nrows++;
+			if (nrows >= maxRows)
+				return nrows;
+			// Set null break point
+			breakEnd = rowStart;
+			breakWidth = 0.0;
+			breakMaxX = 0.0;
+			// Indicate to skip the white space at the beginning of the row.
+			rowStart = NULL;
+			rowEnd = NULL;
+			rowWidth = 0;
+			rowMinX = rowMaxX = 0;
+		} else {
+			if (rowStart == NULL) {
+				// Skip white space until the beginning of the line
+				if (type == NVG_CHAR || type == NVG_CJK_CHAR) {
+					// The current char is the row so far
+					rowStartX = iter.x;
+					rowStart = iter.str;
+					rowEnd = iter.next;
+					rowWidth = iter.nextx - rowStartX;
+					rowMinX = q.x0 - rowStartX;
+					rowMaxX = q.x1 - rowStartX;
+					wordStart = iter.str;
+					wordStartX = iter.x;
+					wordMinX = q.x0 - rowStartX;
+					// Set null break point
+					breakEnd = rowStart;
+					breakWidth = 0.0;
+					breakMaxX = 0.0;
+				}
+			} else {
+				float nextWidth = iter.nextx - rowStartX;
+
+				// track last non-white space character
+				if (type == NVG_CHAR || type == NVG_CJK_CHAR) {
+					rowEnd = iter.next;
+					rowWidth = iter.nextx - rowStartX;
+					rowMaxX = q.x1 - rowStartX;
+				}
+				// track last end of a word
+				if (((ptype == NVG_CHAR || ptype == NVG_CJK_CHAR) && type == NVG_SPACE) || type == NVG_CJK_CHAR) {
+					breakEnd = iter.str;
+					breakWidth = rowWidth;
+					breakMaxX = rowMaxX;
+				}
+				// track last beginning of a word
+				if ((ptype == NVG_SPACE && (type == NVG_CHAR || type == NVG_CJK_CHAR)) || type == NVG_CJK_CHAR) {
+					wordStart = iter.str;
+					wordStartX = iter.x;
+					wordMinX = q.x0;
+				}
+
+				// Break to new line when a character is beyond break width.
+				if ((type == NVG_CHAR || type == NVG_CJK_CHAR) && nextWidth > breakRowWidth) {
+					// The run length is too long, need to break to new line.
+					if (breakEnd == rowStart) {
+						// The current word is longer than the row length, just break it from here.
+						rows[nrows].start = rowStart;
+						rows[nrows].end = iter.str;
+						rows[nrows].width = rowWidth * invscale;
+						rows[nrows].minx = rowMinX * invscale;
+						rows[nrows].maxx = rowMaxX * invscale;
+						rows[nrows].next = iter.str;
+						nrows++;
+						if (nrows >= maxRows)
+							return nrows;
+						rowStartX = iter.x;
+						rowStart = iter.str;
+						rowEnd = iter.next;
+						rowWidth = iter.nextx - rowStartX;
+						rowMinX = q.x0 - rowStartX;
+						rowMaxX = q.x1 - rowStartX;
+						wordStart = iter.str;
+						wordStartX = iter.x;
+						wordMinX = q.x0 - rowStartX;
+					} else {
+						// Break the line from the end of the last word, and start new line from the beginning of the new.
+						rows[nrows].start = rowStart;
+						rows[nrows].end = breakEnd;
+						rows[nrows].width = breakWidth * invscale;
+						rows[nrows].minx = rowMinX * invscale;
+						rows[nrows].maxx = breakMaxX * invscale;
+						rows[nrows].next = wordStart;
+						nrows++;
+						if (nrows >= maxRows)
+							return nrows;
+						// Update row
+						rowStartX = wordStartX;
+						rowStart = wordStart;
+						rowEnd = iter.next;
+						rowWidth = iter.nextx - rowStartX;
+						rowMinX = wordMinX - rowStartX;
+						rowMaxX = q.x1 - rowStartX;
+					}
+					// Set null break point
+					breakEnd = rowStart;
+					breakWidth = 0.0;
+					breakMaxX = 0.0;
+				}
+			}
+		}
+
+		pcodepoint = iter.codepoint;
+		ptype = type;
+	}
+
+	// Break the line from the end of the last word, and start new line from the beginning of the new.
+	if (rowStart != NULL) {
+		rows[nrows].start = rowStart;
+		rows[nrows].end = rowEnd;
+		rows[nrows].width = rowWidth * invscale;
+		rows[nrows].minx = rowMinX * invscale;
+		rows[nrows].maxx = rowMaxX * invscale;
+		rows[nrows].next = end;
+		nrows++;
+	}
+
+	return nrows;
+}
+
+float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+	float width;
+
+	if (state->fontId == FONS_INVALID) return 0;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+
+	width = fonsTextBounds(ctx->fs, x*scale, y*scale, string, end, bounds);
+	if (bounds != NULL) {
+		// Use line bounds for height.
+		fonsLineBounds(ctx->fs, y*scale, &bounds[1], &bounds[3]);
+		bounds[0] *= invscale;
+		bounds[1] *= invscale;
+		bounds[2] *= invscale;
+		bounds[3] *= invscale;
+	}
+	return width * invscale;
+}
+
+void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds)
+{
+	NVGstate* state = nvg__getState(ctx);
+	NVGtextRow rows[2];
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+	int nrows = 0, i;
+	int oldAlign = state->textAlign;
+	int haling = state->textAlign & (NVG_ALIGN_LEFT | NVG_ALIGN_CENTER | NVG_ALIGN_RIGHT);
+	int valign = state->textAlign & (NVG_ALIGN_TOP | NVG_ALIGN_MIDDLE | NVG_ALIGN_BOTTOM | NVG_ALIGN_BASELINE);
+	float lineh = 0, rminy = 0, rmaxy = 0;
+	float minx, miny, maxx, maxy;
+
+	if (state->fontId == FONS_INVALID) {
+		if (bounds != NULL)
+			bounds[0] = bounds[1] = bounds[2] = bounds[3] = 0.0f;
+		return;
+	}
+
+	nvgTextMetrics(ctx, NULL, NULL, &lineh);
+
+	state->textAlign = NVG_ALIGN_LEFT | valign;
+
+	minx = maxx = x;
+	miny = maxy = y;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+	fonsLineBounds(ctx->fs, 0, &rminy, &rmaxy);
+	rminy *= invscale;
+	rmaxy *= invscale;
+
+	while ((nrows = nvgTextBreakLines(ctx, string, end, breakRowWidth, rows, 2))) {
+		for (i = 0; i < nrows; i++) {
+			NVGtextRow* row = &rows[i];
+			float rminx, rmaxx, dx = 0;
+			// Horizontal bounds
+			if (haling & NVG_ALIGN_LEFT)
+				dx = 0;
+			else if (haling & NVG_ALIGN_CENTER)
+				dx = breakRowWidth*0.5f - row->width*0.5f;
+			else if (haling & NVG_ALIGN_RIGHT)
+				dx = breakRowWidth - row->width;
+			rminx = x + row->minx + dx;
+			rmaxx = x + row->maxx + dx;
+			minx = nvg__minf(minx, rminx);
+			maxx = nvg__maxf(maxx, rmaxx);
+			// Vertical bounds.
+			miny = nvg__minf(miny, y + rminy);
+			maxy = nvg__maxf(maxy, y + rmaxy);
+
+			y += lineh * state->lineHeight;
+		}
+		string = rows[nrows-1].next;
+	}
+
+	state->textAlign = oldAlign;
+
+	if (bounds != NULL) {
+		bounds[0] = minx;
+		bounds[1] = miny;
+		bounds[2] = maxx;
+		bounds[3] = maxy;
+	}
+}
+
+void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh)
+{
+	NVGstate* state = nvg__getState(ctx);
+	float scale = nvg__getFontScale(state) * ctx->devicePxRatio;
+	float invscale = 1.0f / scale;
+
+	if (state->fontId == FONS_INVALID) return;
+
+	fonsSetSize(ctx->fs, state->fontSize*scale);
+	fonsSetSpacing(ctx->fs, state->letterSpacing*scale);
+	fonsSetBlur(ctx->fs, state->fontBlur*scale);
+	fonsSetAlign(ctx->fs, state->textAlign);
+	fonsSetFont(ctx->fs, state->fontId);
+
+	fonsVertMetrics(ctx->fs, ascender, descender, lineh);
+	if (ascender != NULL)
+		*ascender *= invscale;
+	if (descender != NULL)
+		*descender *= invscale;
+	if (lineh != NULL)
+		*lineh *= invscale;
+}
+// vim: ft=c nu noet ts=4
diff --git a/source/thirdparty/nanovg.h b/source/thirdparty/nanovg.h
new file mode 100644
index 0000000..f32a175
--- /dev/null
+++ b/source/thirdparty/nanovg.h
@@ -0,0 +1,708 @@
+//
+// Copyright (c) 2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#ifndef NANOVG_H_F380EB38_CDA3_11EA_AF53_BBD96082A0CB
+#define NANOVG_H_F380EB38_CDA3_11EA_AF53_BBD96082A0CB
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define NVG_PI 3.14159265358979323846264338327f
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4201)  // nonstandard extension used : nameless struct/union
+#endif
+
+typedef struct NVGcontext NVGcontext;
+
+struct NVGcolor {
+	union {
+		float rgba[4];
+		struct {
+			float r,g,b,a;
+		};
+	};
+};
+typedef struct NVGcolor NVGcolor;
+
+struct NVGpaint {
+	float xform[6];
+	float extent[2];
+	float radius;
+	float feather;
+	NVGcolor innerColor;
+	NVGcolor outerColor;
+	int image;
+};
+typedef struct NVGpaint NVGpaint;
+
+enum NVGwinding {
+	NVG_CCW = 1,			// Winding for solid shapes
+	NVG_CW = 2,				// Winding for holes
+};
+
+enum NVGsolidity {
+	NVG_SOLID = 1,			// CCW
+	NVG_HOLE = 2,			// CW
+};
+
+enum NVGlineCap {
+	NVG_BUTT,
+	NVG_ROUND,
+	NVG_SQUARE,
+	NVG_BEVEL,
+	NVG_MITER,
+};
+
+enum NVGalign {
+	// Horizontal align
+	NVG_ALIGN_LEFT 		= 1<<0,	// Default, align text horizontally to left.
+	NVG_ALIGN_CENTER 	= 1<<1,	// Align text horizontally to center.
+	NVG_ALIGN_RIGHT 	= 1<<2,	// Align text horizontally to right.
+	// Vertical align
+	NVG_ALIGN_TOP 		= 1<<3,	// Align text vertically to top.
+	NVG_ALIGN_MIDDLE	= 1<<4,	// Align text vertically to middle.
+	NVG_ALIGN_BOTTOM	= 1<<5,	// Align text vertically to bottom.
+	NVG_ALIGN_BASELINE	= 1<<6, // Default, align text vertically to baseline.
+};
+
+enum NVGblendFactor {
+	NVG_ZERO = 1<<0,
+	NVG_ONE = 1<<1,
+	NVG_SRC_COLOR = 1<<2,
+	NVG_ONE_MINUS_SRC_COLOR = 1<<3,
+	NVG_DST_COLOR = 1<<4,
+	NVG_ONE_MINUS_DST_COLOR = 1<<5,
+	NVG_SRC_ALPHA = 1<<6,
+	NVG_ONE_MINUS_SRC_ALPHA = 1<<7,
+	NVG_DST_ALPHA = 1<<8,
+	NVG_ONE_MINUS_DST_ALPHA = 1<<9,
+	NVG_SRC_ALPHA_SATURATE = 1<<10,
+};
+
+enum NVGcompositeOperation {
+	NVG_SOURCE_OVER,
+	NVG_SOURCE_IN,
+	NVG_SOURCE_OUT,
+	NVG_ATOP,
+	NVG_DESTINATION_OVER,
+	NVG_DESTINATION_IN,
+	NVG_DESTINATION_OUT,
+	NVG_DESTINATION_ATOP,
+	NVG_LIGHTER,
+	NVG_COPY,
+	NVG_XOR,
+};
+
+struct NVGcompositeOperationState {
+	int srcRGB;
+	int dstRGB;
+	int srcAlpha;
+	int dstAlpha;
+};
+typedef struct NVGcompositeOperationState NVGcompositeOperationState;
+
+struct NVGglyphPosition {
+	const char* str;	// Position of the glyph in the input string.
+	float x;			// The x-coordinate of the logical glyph position.
+	float minx, maxx;	// The bounds of the glyph shape.
+};
+typedef struct NVGglyphPosition NVGglyphPosition;
+
+struct NVGtextRow {
+	const char* start;	// Pointer to the input text where the row starts.
+	const char* end;	// Pointer to the input text where the row ends (one past the last character).
+	const char* next;	// Pointer to the beginning of the next row.
+	float width;		// Logical width of the row.
+	float minx, maxx;	// Actual bounds of the row. Logical with and bounds can differ because of kerning and some parts over extending.
+};
+typedef struct NVGtextRow NVGtextRow;
+
+enum NVGimageFlags {
+    NVG_IMAGE_GENERATE_MIPMAPS	= 1<<0,     // Generate mipmaps during creation of the image.
+	NVG_IMAGE_REPEATX			= 1<<1,		// Repeat image in X direction.
+	NVG_IMAGE_REPEATY			= 1<<2,		// Repeat image in Y direction.
+	NVG_IMAGE_FLIPY				= 1<<3,		// Flips (inverses) image in Y direction when rendered.
+	NVG_IMAGE_PREMULTIPLIED		= 1<<4,		// Image data has premultiplied alpha.
+	NVG_IMAGE_NEAREST			= 1<<5,		// Image interpolation is Nearest instead Linear
+};
+
+// Begin drawing a new frame
+// Calls to nanovg drawing API should be wrapped in nvgBeginFrame() & nvgEndFrame()
+// nvgBeginFrame() defines the size of the window to render to in relation currently
+// set viewport (i.e. glViewport on GL backends). Device pixel ration allows to
+// control the rendering on Hi-DPI devices.
+// For example, GLFW returns two dimension for an opened window: window size and
+// frame buffer size. In that case you would set windowWidth/Height to the window size
+// devicePixelRatio to: frameBufferWidth / windowWidth.
+void nvgBeginFrame(NVGcontext* ctx, float windowWidth, float windowHeight, float devicePixelRatio);
+
+// Cancels drawing the current frame.
+void nvgCancelFrame(NVGcontext* ctx);
+
+// Ends drawing flushing remaining render state.
+void nvgEndFrame(NVGcontext* ctx);
+
+//
+// Composite operation
+//
+// The composite operations in NanoVG are modeled after HTML Canvas API, and
+// the blend func is based on OpenGL (see corresponding manuals for more info).
+// The colors in the blending state have premultiplied alpha.
+
+// Sets the composite operation. The op parameter should be one of NVGcompositeOperation.
+void nvgGlobalCompositeOperation(NVGcontext* ctx, int op);
+
+// Sets the composite operation with custom pixel arithmetic. The parameters should be one of NVGblendFactor.
+void nvgGlobalCompositeBlendFunc(NVGcontext* ctx, int sfactor, int dfactor);
+
+// Sets the composite operation with custom pixel arithmetic for RGB and alpha components separately. The parameters should be one of NVGblendFactor.
+void nvgGlobalCompositeBlendFuncSeparate(NVGcontext* ctx, int srcRGB, int dstRGB, int srcAlpha, int dstAlpha);
+
+//
+// Color utils
+//
+// Colors in NanoVG are stored as unsigned ints in ABGR format.
+
+// Returns a color value from red, green, blue values. Alpha will be set to 255 (1.0f).
+NVGcolor nvgRGB(unsigned char r, unsigned char g, unsigned char b);
+
+// Returns a color value from red, green, blue values. Alpha will be set to 1.0f.
+NVGcolor nvgRGBf(float r, float g, float b);
+
+
+// Returns a color value from red, green, blue and alpha values.
+NVGcolor nvgRGBA(unsigned char r, unsigned char g, unsigned char b, unsigned char a);
+
+// Returns a color value from red, green, blue and alpha values.
+NVGcolor nvgRGBAf(float r, float g, float b, float a);
+
+
+// Linearly interpolates from color c0 to c1, and returns resulting color value.
+NVGcolor nvgLerpRGBA(NVGcolor c0, NVGcolor c1, float u);
+
+// Sets transparency of a color value.
+NVGcolor nvgTransRGBA(NVGcolor c0, unsigned char a);
+
+// Sets transparency of a color value.
+NVGcolor nvgTransRGBAf(NVGcolor c0, float a);
+
+// Returns color value specified by hue, saturation and lightness.
+// HSL values are all in range [0..1], alpha will be set to 255.
+NVGcolor nvgHSL(float h, float s, float l);
+
+// Returns color value specified by hue, saturation and lightness and alpha.
+// HSL values are all in range [0..1], alpha in range [0..255]
+NVGcolor nvgHSLA(float h, float s, float l, unsigned char a);
+
+//
+// State Handling
+//
+// NanoVG contains state which represents how paths will be rendered.
+// The state contains transform, fill and stroke styles, text and font styles,
+// and scissor clipping.
+
+// Pushes and saves the current render state into a state stack.
+// A matching nvgRestore() must be used to restore the state.
+void nvgSave(NVGcontext* ctx);
+
+// Pops and restores current render state.
+void nvgRestore(NVGcontext* ctx);
+
+// Resets current render state to default values. Does not affect the render state stack.
+void nvgReset(NVGcontext* ctx);
+
+//
+// Render styles
+//
+// Fill and stroke render style can be either a solid color or a paint which is a gradient or a pattern.
+// Solid color is simply defined as a color value, different kinds of paints can be created
+// using nvgLinearGradient(), nvgBoxGradient(), nvgRadialGradient() and nvgImagePattern().
+//
+// Current render style can be saved and restored using nvgSave() and nvgRestore().
+
+// Sets whether to draw antialias for nvgStroke() and nvgFill(). It's enabled by default.
+void nvgShapeAntiAlias(NVGcontext* ctx, int enabled);
+
+// Sets current stroke style to a solid color.
+void nvgStrokeColor(NVGcontext* ctx, NVGcolor color);
+
+// Sets current stroke style to a paint, which can be a one of the gradients or a pattern.
+void nvgStrokePaint(NVGcontext* ctx, NVGpaint paint);
+
+// Sets current fill style to a solid color.
+void nvgFillColor(NVGcontext* ctx, NVGcolor color);
+
+// Sets current fill style to a paint, which can be a one of the gradients or a pattern.
+void nvgFillPaint(NVGcontext* ctx, NVGpaint paint);
+
+// Sets the miter limit of the stroke style.
+// Miter limit controls when a sharp corner is beveled.
+void nvgMiterLimit(NVGcontext* ctx, float limit);
+
+// Sets the stroke width of the stroke style.
+void nvgStrokeWidth(NVGcontext* ctx, float size);
+
+// Sets how the end of the line (cap) is drawn,
+// Can be one of: NVG_BUTT (default), NVG_ROUND, NVG_SQUARE.
+void nvgLineCap(NVGcontext* ctx, int cap);
+
+// Sets how sharp path corners are drawn.
+// Can be one of NVG_MITER (default), NVG_ROUND, NVG_BEVEL.
+void nvgLineJoin(NVGcontext* ctx, int join);
+
+// Sets the transparency applied to all rendered shapes.
+// Already transparent paths will get proportionally more transparent as well.
+void nvgGlobalAlpha(NVGcontext* ctx, float alpha);
+
+//
+// Transforms
+//
+// The paths, gradients, patterns and scissor region are transformed by an transformation
+// matrix at the time when they are passed to the API.
+// The current transformation matrix is a affine matrix:
+//   [sx kx tx]
+//   [ky sy ty]
+//   [ 0  0  1]
+// Where: sx,sy define scaling, kx,ky skewing, and tx,ty translation.
+// The last row is assumed to be 0,0,1 and is not stored.
+//
+// Apart from nvgResetTransform(), each transformation function first creates
+// specific transformation matrix and pre-multiplies the current transformation by it.
+//
+// Current coordinate system (transformation) can be saved and restored using nvgSave() and nvgRestore().
+
+// Resets current transform to a identity matrix.
+void nvgResetTransform(NVGcontext* ctx);
+
+// Premultiplies current coordinate system by specified matrix.
+// The parameters are interpreted as matrix as follows:
+//   [a c e]
+//   [b d f]
+//   [0 0 1]
+void nvgTransform(NVGcontext* ctx, float a, float b, float c, float d, float e, float f);
+
+// Translates current coordinate system.
+void nvgTranslate(NVGcontext* ctx, float x, float y);
+
+// Rotates current coordinate system. Angle is specified in radians.
+void nvgRotate(NVGcontext* ctx, float angle);
+
+// Skews the current coordinate system along X axis. Angle is specified in radians.
+void nvgSkewX(NVGcontext* ctx, float angle);
+
+// Skews the current coordinate system along Y axis. Angle is specified in radians.
+void nvgSkewY(NVGcontext* ctx, float angle);
+
+// Scales the current coordinate system.
+void nvgScale(NVGcontext* ctx, float x, float y);
+
+// Stores the top part (a-f) of the current transformation matrix in to the specified buffer.
+//   [a c e]
+//   [b d f]
+//   [0 0 1]
+// There should be space for 6 floats in the return buffer for the values a-f.
+void nvgCurrentTransform(NVGcontext* ctx, float* xform);
+
+
+// The following functions can be used to make calculations on 2x3 transformation matrices.
+// A 2x3 matrix is represented as float[6].
+
+// Sets the transform to identity matrix.
+void nvgTransformIdentity(float* dst);
+
+// Sets the transform to translation matrix matrix.
+void nvgTransformTranslate(float* dst, float tx, float ty);
+
+// Sets the transform to scale matrix.
+void nvgTransformScale(float* dst, float sx, float sy);
+
+// Sets the transform to rotate matrix. Angle is specified in radians.
+void nvgTransformRotate(float* dst, float a);
+
+// Sets the transform to skew-x matrix. Angle is specified in radians.
+void nvgTransformSkewX(float* dst, float a);
+
+// Sets the transform to skew-y matrix. Angle is specified in radians.
+void nvgTransformSkewY(float* dst, float a);
+
+// Sets the transform to the result of multiplication of two transforms, of A = A*B.
+void nvgTransformMultiply(float* dst, const float* src);
+
+// Sets the transform to the result of multiplication of two transforms, of A = B*A.
+void nvgTransformPremultiply(float* dst, const float* src);
+
+// Sets the destination to inverse of specified transform.
+// Returns 1 if the inverse could be calculated, else 0.
+int nvgTransformInverse(float* dst, const float* src);
+
+// Transform a point by given transform.
+void nvgTransformPoint(float* dstx, float* dsty, const float* xform, float srcx, float srcy);
+
+// Converts degrees to radians and vice versa.
+float nvgDegToRad(float deg);
+float nvgRadToDeg(float rad);
+
+//
+// Images
+//
+// NanoVG allows you to load jpg, png, psd, tga, pic and gif files to be used for rendering.
+// In addition you can upload your own image. The image loading is provided by stb_image.
+// The parameter imageFlags is combination of flags defined in NVGimageFlags.
+
+// Creates image by loading it from the disk from specified file name.
+// Returns handle to the image.
+int nvgCreateImage(NVGcontext* ctx, const char* filename, int imageFlags);
+
+// Creates image by loading it from the specified chunk of memory.
+// Returns handle to the image.
+int nvgCreateImageMem(NVGcontext* ctx, int imageFlags, unsigned char* data, int ndata);
+
+// Creates image from specified image data.
+// Returns handle to the image.
+int nvgCreateImageRGBA(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data);
+
+int nvgCreateImageAlpha(NVGcontext* ctx, int w, int h, int imageFlags, const unsigned char* data);
+
+// Updates image data specified by image handle.
+void nvgUpdateImage(NVGcontext* ctx, int image, const unsigned char* data);
+
+// Returns the dimensions of a created image.
+void nvgImageSize(NVGcontext* ctx, int image, int* w, int* h);
+
+// Deletes created image.
+void nvgDeleteImage(NVGcontext* ctx, int image);
+
+//
+// Paints
+//
+// NanoVG supports four types of paints: linear gradient, box gradient, radial gradient and image pattern.
+// These can be used as paints for strokes and fills.
+
+// Creates and returns a linear gradient. Parameters (sx,sy)-(ex,ey) specify the start and end coordinates
+// of the linear gradient, icol specifies the start color and ocol the end color.
+// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
+NVGpaint nvgLinearGradient(NVGcontext* ctx, float sx, float sy, float ex, float ey,
+						   NVGcolor icol, NVGcolor ocol);
+
+// Creates and returns a box gradient. Box gradient is a feathered rounded rectangle, it is useful for rendering
+// drop shadows or highlights for boxes. Parameters (x,y) define the top-left corner of the rectangle,
+// (w,h) define the size of the rectangle, r defines the corner radius, and f feather. Feather defines how blurry
+// the border of the rectangle is. Parameter icol specifies the inner color and ocol the outer color of the gradient.
+// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
+NVGpaint nvgBoxGradient(NVGcontext* ctx, float x, float y, float w, float h,
+						float r, float f, NVGcolor icol, NVGcolor ocol);
+
+// Creates and returns a radial gradient. Parameters (cx,cy) specify the center, inr and outr specify
+// the inner and outer radius of the gradient, icol specifies the start color and ocol the end color.
+// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
+NVGpaint nvgRadialGradient(NVGcontext* ctx, float cx, float cy, float inr, float outr,
+						   NVGcolor icol, NVGcolor ocol);
+
+// Creates and returns an image pattern. Parameters (ox,oy) specify the left-top location of the image pattern,
+// (ex,ey) the size of one image, angle rotation around the top-left corner, image is handle to the image to render.
+// The gradient is transformed by the current transform when it is passed to nvgFillPaint() or nvgStrokePaint().
+NVGpaint nvgImagePattern(NVGcontext* ctx, float ox, float oy, float ex, float ey,
+						 float angle, int image, float alpha);
+
+//
+// Scissoring
+//
+// Scissoring allows you to clip the rendering into a rectangle. This is useful for various
+// user interface cases like rendering a text edit or a timeline.
+
+// Sets the current scissor rectangle.
+// The scissor rectangle is transformed by the current transform.
+void nvgScissor(NVGcontext* ctx, float x, float y, float w, float h);
+
+// Intersects current scissor rectangle with the specified rectangle.
+// The scissor rectangle is transformed by the current transform.
+// Note: in case the rotation of previous scissor rect differs from
+// the current one, the intersection will be done between the specified
+// rectangle and the previous scissor rectangle transformed in the current
+// transform space. The resulting shape is always rectangle.
+void nvgIntersectScissor(NVGcontext* ctx, float x, float y, float w, float h);
+
+// Reset and disables scissoring.
+void nvgResetScissor(NVGcontext* ctx);
+
+//
+// Paths
+//
+// Drawing a new shape starts with nvgBeginPath(), it clears all the currently defined paths.
+// Then you define one or more paths and sub-paths which describe the shape. The are functions
+// to draw common shapes like rectangles and circles, and lower level step-by-step functions,
+// which allow to define a path curve by curve.
+//
+// NanoVG uses even-odd fill rule to draw the shapes. Solid shapes should have counter clockwise
+// winding and holes should have counter clockwise order. To specify winding of a path you can
+// call nvgPathWinding(). This is useful especially for the common shapes, which are drawn CCW.
+//
+// Finally you can fill the path using current fill style by calling nvgFill(), and stroke it
+// with current stroke style by calling nvgStroke().
+//
+// The curve segments and sub-paths are transformed by the current transform.
+
+// Clears the current path and sub-paths.
+void nvgBeginPath(NVGcontext* ctx);
+
+// Starts new sub-path with specified point as first point.
+void nvgMoveTo(NVGcontext* ctx, float x, float y);
+
+// Adds line segment from the last point in the path to the specified point.
+void nvgLineTo(NVGcontext* ctx, float x, float y);
+
+// Adds cubic bezier segment from last point in the path via two control points to the specified point.
+void nvgBezierTo(NVGcontext* ctx, float c1x, float c1y, float c2x, float c2y, float x, float y);
+
+// Adds quadratic bezier segment from last point in the path via a control point to the specified point.
+void nvgQuadTo(NVGcontext* ctx, float cx, float cy, float x, float y);
+
+// Adds an arc segment at the corner defined by the last path point, and two specified points.
+void nvgArcTo(NVGcontext* ctx, float x1, float y1, float x2, float y2, float radius);
+
+// Closes current sub-path with a line segment.
+void nvgClosePath(NVGcontext* ctx);
+
+// Sets the current sub-path winding, see NVGwinding and NVGsolidity.
+void nvgPathWinding(NVGcontext* ctx, int dir);
+
+// Creates new circle arc shaped sub-path. The arc center is at cx,cy, the arc radius is r,
+// and the arc is drawn from angle a0 to a1, and swept in direction dir (NVG_CCW, or NVG_CW).
+// Angles are specified in radians.
+void nvgArc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir);
+
+void nvgBarc(NVGcontext* ctx, float cx, float cy, float r, float a0, float a1, int dir, int join);
+
+// Creates new rectangle shaped sub-path.
+void nvgRect(NVGcontext* ctx, float x, float y, float w, float h);
+
+// Creates new rounded rectangle shaped sub-path.
+void nvgRoundedRect(NVGcontext* ctx, float x, float y, float w, float h, float r);
+
+// Creates new rounded rectangle shaped sub-path with varying radii for each corner.
+void nvgRoundedRectVarying(NVGcontext* ctx, float x, float y, float w, float h, float radTopLeft, float radTopRight, float radBottomRight, float radBottomLeft);
+
+// Creates new ellipse shaped sub-path.
+void nvgEllipse(NVGcontext* ctx, float cx, float cy, float rx, float ry);
+
+// Creates new circle shaped sub-path.
+void nvgCircle(NVGcontext* ctx, float cx, float cy, float r);
+
+// Fills the current path with current fill style.
+void nvgFill(NVGcontext* ctx);
+
+// Fills the current path with current stroke style.
+void nvgStroke(NVGcontext* ctx);
+
+
+//
+// Text
+//
+// NanoVG allows you to load .ttf files and use the font to render text.
+//
+// The appearance of the text can be defined by setting the current text style
+// and by specifying the fill color. Common text and font settings such as
+// font size, letter spacing and text align are supported. Font blur allows you
+// to create simple text effects such as drop shadows.
+//
+// At render time the font face can be set based on the font handles or name.
+//
+// Font measure functions return values in local space, the calculations are
+// carried in the same resolution as the final rendering. This is done because
+// the text glyph positions are snapped to the nearest pixels sharp rendering.
+//
+// The local space means that values are not rotated or scale as per the current
+// transformation. For example if you set font size to 12, which would mean that
+// line height is 16, then regardless of the current scaling and rotation, the
+// returned line height is always 16. Some measures may vary because of the scaling
+// since aforementioned pixel snapping.
+//
+// While this may sound a little odd, the setup allows you to always render the
+// same way regardless of scaling. I.e. following works regardless of scaling:
+//
+//		const char* txt = "Text me up.";
+//		nvgTextBounds(vg, x,y, txt, NULL, bounds);
+//		nvgBeginPath(vg);
+//		nvgRoundedRect(vg, bounds[0],bounds[1], bounds[2]-bounds[0], bounds[3]-bounds[1]);
+//		nvgFill(vg);
+//
+// Note: currently only solid color fill is supported for text.
+
+// Creates font by loading it from the disk from specified file name.
+// Returns handle to the font.
+int nvgCreateFont(NVGcontext* ctx, const char* name, const char* filename);
+
+// fontIndex specifies which font face to load from a .ttf/.ttc file.
+int nvgCreateFontAtIndex(NVGcontext* ctx, const char* name, const char* filename, const int fontIndex);
+
+// Creates font by loading it from the specified memory chunk.
+// Returns handle to the font.
+int nvgCreateFontMem(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData);
+
+// fontIndex specifies which font face to load from a .ttf/.ttc file.
+int nvgCreateFontMemAtIndex(NVGcontext* ctx, const char* name, unsigned char* data, int ndata, int freeData, const int fontIndex);
+
+// Finds a loaded font of specified name, and returns handle to it, or -1 if the font is not found.
+int nvgFindFont(NVGcontext* ctx, const char* name);
+
+// Adds a fallback font by handle.
+int nvgAddFallbackFontId(NVGcontext* ctx, int baseFont, int fallbackFont);
+
+// Adds a fallback font by name.
+int nvgAddFallbackFont(NVGcontext* ctx, const char* baseFont, const char* fallbackFont);
+
+// Resets fallback fonts by handle.
+void nvgResetFallbackFontsId(NVGcontext* ctx, int baseFont);
+
+// Resets fallback fonts by name.
+void nvgResetFallbackFonts(NVGcontext* ctx, const char* baseFont);
+
+// Sets the font size of current text style.
+void nvgFontSize(NVGcontext* ctx, float size);
+
+// Sets the blur of current text style.
+void nvgFontBlur(NVGcontext* ctx, float blur);
+
+// Sets the letter spacing of current text style.
+void nvgTextLetterSpacing(NVGcontext* ctx, float spacing);
+
+// Sets the proportional line height of current text style. The line height is specified as multiple of font size.
+void nvgTextLineHeight(NVGcontext* ctx, float lineHeight);
+
+// Sets the text align of current text style, see NVGalign for options.
+void nvgTextAlign(NVGcontext* ctx, int align);
+
+// Sets the font face based on specified id of current text style.
+void nvgFontFaceId(NVGcontext* ctx, int font);
+
+// Sets the font face based on specified name of current text style.
+void nvgFontFace(NVGcontext* ctx, const char* font);
+
+// Draws text string at specified location. If end is specified only the sub-string up to the end is drawn.
+float nvgText(NVGcontext* ctx, float x, float y, const char* string, const char* end);
+
+// Draws multi-line text string at specified location wrapped at the specified width. If end is specified only the sub-string up to the end is drawn.
+// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered.
+// Words longer than the max width are slit at nearest character (i.e. no hyphenation).
+void nvgTextBox(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end);
+
+// Measures the specified text string. Parameter bounds should be a pointer to float[4],
+// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax]
+// Returns the horizontal advance of the measured text (i.e. where the next character should drawn).
+// Measured values are returned in local coordinate space.
+float nvgTextBounds(NVGcontext* ctx, float x, float y, const char* string, const char* end, float* bounds);
+
+// Measures the specified multi-text string. Parameter bounds should be a pointer to float[4],
+// if the bounding box of the text should be returned. The bounds value are [xmin,ymin, xmax,ymax]
+// Measured values are returned in local coordinate space.
+void nvgTextBoxBounds(NVGcontext* ctx, float x, float y, float breakRowWidth, const char* string, const char* end, float* bounds);
+
+// Calculates the glyph x positions of the specified text. If end is specified only the sub-string will be used.
+// Measured values are returned in local coordinate space.
+int nvgTextGlyphPositions(NVGcontext* ctx, float x, float y, const char* string, const char* end, NVGglyphPosition* positions, int maxPositions);
+
+// Returns the vertical metrics based on the current text style.
+// Measured values are returned in local coordinate space.
+void nvgTextMetrics(NVGcontext* ctx, float* ascender, float* descender, float* lineh);
+
+// Breaks the specified text into lines. If end is specified only the sub-string will be used.
+// White space is stripped at the beginning of the rows, the text is split at word boundaries or when new-line characters are encountered.
+// Words longer than the max width are slit at nearest character (i.e. no hyphenation).
+int nvgTextBreakLines(NVGcontext* ctx, const char* string, const char* end, float breakRowWidth, NVGtextRow* rows, int maxRows);
+
+//
+// Internal Render API
+//
+enum NVGtexture {
+	NVG_TEXTURE_ALPHA = 0x01,
+	NVG_TEXTURE_RGBA = 0x02,
+};
+
+struct NVGscissor {
+	float xform[6];
+	float extent[2];
+};
+typedef struct NVGscissor NVGscissor;
+
+struct NVGvertex {
+	float x,y,u,v;
+};
+typedef struct NVGvertex NVGvertex;
+
+struct NVGpath {
+	int first;
+	int count;
+	unsigned char closed;
+	int nbevel;
+	NVGvertex* fill;
+	int nfill;
+	NVGvertex* stroke;
+	int nstroke;
+	int winding;
+	int convex;
+};
+typedef struct NVGpath NVGpath;
+
+struct NVGparams {
+	void* userPtr;
+	int edgeAntiAlias;
+	int (*renderCreate)(void* uptr);
+	int (*renderCreateTexture)(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data);
+	int (*renderDeleteTexture)(void* uptr, int image);
+	int (*renderUpdateTexture)(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data);
+	int (*renderGetTextureSize)(void* uptr, int image, int* w, int* h);
+	void (*renderViewport)(void* uptr, float width, float height, float devicePixelRatio);
+	void (*renderCancel)(void* uptr);
+	void (*renderFlush)(void* uptr);
+	void (*renderFill)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, const float* bounds, const NVGpath* paths, int npaths);
+	void (*renderStroke)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe, float strokeWidth, const NVGpath* paths, int npaths);
+	void (*renderTriangles)(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, const NVGvertex* verts, int nverts, float fringe);
+	void (*renderDelete)(void* uptr);
+};
+typedef struct NVGparams NVGparams;
+
+// Constructor and destructor, called by the render back-end.
+NVGcontext* nvgCreateInternal(NVGparams* params);
+void nvgDeleteInternal(NVGcontext* ctx);
+
+NVGparams* nvgInternalParams(NVGcontext* ctx);
+
+// Debug function to dump cached path data.
+void nvgDebugDumpPathCache(NVGcontext* ctx);
+
+#if defined(__ANDROID__)
+#include <stdio.h>
+#include <android/asset_manager.h>
+void nvgSetAndroidAssetManager(AAssetManager * manager);
+FILE * android_fopen(const char* fname, const char* mode);
+#endif
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+#define NVG_NOTUSED(v) for (;;) { (void)(1 ? (void)0 : ( (void)(v) ) ); break; }
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NANOVG_H_F380EB38_CDA3_11EA_AF53_BBD96082A0CB
diff --git a/source/thirdparty/nanovg_gl.c b/source/thirdparty/nanovg_gl.c
new file mode 100644
index 0000000..8a6f53f
--- /dev/null
+++ b/source/thirdparty/nanovg_gl.c
@@ -0,0 +1,1651 @@
+//
+// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#if defined(NANOVG_GL2) + defined(NANOVG_GL3) + defined(NANOVG_GLES2) + defined(NANOVG_GLES3) != 1
+#error Define exactly one of NANOVG_GL2, NANOVG_GL3, NANOVG_GLES2, NANOVG_GLES3
+#endif
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <math.h>
+
+#include "android.h"
+
+#ifdef NANOVG_USE_GLEW
+#  include <GL/glew.h>
+static int glew_initialized = 0;
+#endif
+
+#ifdef NANOVG_GLES2
+#  include <GLES2/gl2.h>
+#  include <GLES2/gl2ext.h>
+#endif
+
+#ifdef NANOVG_GLES3
+#  include <GLES3/gl3.h>
+#endif
+
+#if defined(NANOVG_GL2) || defined(NANOVG_GL3)
+#include <GL/gl.h>
+#endif
+
+#include "nanovg_gl.h"
+
+#if defined NANOVG_GL2
+//#  define NANOVG_GL2 1
+#elif defined NANOVG_GL3
+//#  define NANOVG_GL3 1
+#  define NANOVG_GL_USE_UNIFORMBUFFER 1
+#elif defined NANOVG_GLES2
+//#  define NANOVG_GLES2 1
+#elif defined NANOVG_GLES3
+//#  define NANOVG_GLES3 1
+#endif
+
+#define NANOVG_GL_USE_STATE_FILTER (1)
+
+enum GLNVGuniformLoc {
+	GLNVG_LOC_VIEWSIZE,
+	GLNVG_LOC_TEX,
+	GLNVG_LOC_FRAG,
+	GLNVG_MAX_LOCS
+};
+
+enum GLNVGshaderType {
+	NSVG_SHADER_FILLGRAD,
+	NSVG_SHADER_FILLIMG,
+	NSVG_SHADER_SIMPLE,
+	NSVG_SHADER_IMG
+};
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+enum GLNVGuniformBindings {
+	GLNVG_FRAG_BINDING = 0,
+};
+#endif
+
+struct GLNVGshader {
+	GLuint prog;
+	GLuint frag;
+	GLuint vert;
+	GLint loc[GLNVG_MAX_LOCS];
+};
+typedef struct GLNVGshader GLNVGshader;
+
+struct GLNVGtexture {
+	int id;
+	GLuint tex;
+	int width, height;
+	int type;
+	int flags;
+};
+typedef struct GLNVGtexture GLNVGtexture;
+
+struct GLNVGblend
+{
+	GLenum srcRGB;
+	GLenum dstRGB;
+	GLenum srcAlpha;
+	GLenum dstAlpha;
+};
+typedef struct GLNVGblend GLNVGblend;
+
+enum GLNVGcallType {
+	GLNVG_NONE = 0,
+	GLNVG_FILL,
+	GLNVG_CONVEXFILL,
+	GLNVG_STROKE,
+	GLNVG_TRIANGLES,
+};
+
+struct GLNVGcall {
+	int type;
+	int image;
+	int pathOffset;
+	int pathCount;
+	int triangleOffset;
+	int triangleCount;
+	int uniformOffset;
+	GLNVGblend blendFunc;
+};
+typedef struct GLNVGcall GLNVGcall;
+
+struct GLNVGpath {
+	int fillOffset;
+	int fillCount;
+	int strokeOffset;
+	int strokeCount;
+};
+typedef struct GLNVGpath GLNVGpath;
+
+struct GLNVGfragUniforms {
+	#if NANOVG_GL_USE_UNIFORMBUFFER
+		float scissorMat[12]; // matrices are actually 3 vec4s
+		float paintMat[12];
+		struct NVGcolor innerCol;
+		struct NVGcolor outerCol;
+		float scissorExt[2];
+		float scissorScale[2];
+		float extent[2];
+		float radius;
+		float feather;
+		float strokeMult;
+		float strokeThr;
+		int texType;
+		int type;
+	#else
+		// note: after modifying layout or size of uniform array,
+		// don't forget to also update the fragment shader source!
+		#define NANOVG_GL_UNIFORMARRAY_SIZE 11
+		union {
+			struct {
+				float scissorMat[12]; // matrices are actually 3 vec4s
+				float paintMat[12];
+				struct NVGcolor innerCol;
+				struct NVGcolor outerCol;
+				float scissorExt[2];
+				float scissorScale[2];
+				float extent[2];
+				float radius;
+				float feather;
+				float strokeMult;
+				float strokeThr;
+				float texType;
+				float type;
+			};
+			float uniformArray[NANOVG_GL_UNIFORMARRAY_SIZE][4];
+		};
+	#endif
+};
+typedef struct GLNVGfragUniforms GLNVGfragUniforms;
+
+struct GLNVGcontext {
+	GLNVGshader shader;
+	GLNVGtexture* textures;
+	float view[2];
+	int ntextures;
+	int ctextures;
+	int textureId;
+	GLuint vertBuf;
+#if defined NANOVG_GL3
+	GLuint vertArr;
+#endif
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	GLuint fragBuf;
+#endif
+	int fragSize;
+	int flags;
+
+	// Per frame buffers
+	GLNVGcall* calls;
+	int ccalls;
+	int ncalls;
+	GLNVGpath* paths;
+	int cpaths;
+	int npaths;
+	struct NVGvertex* verts;
+	int cverts;
+	int nverts;
+	unsigned char* uniforms;
+	int cuniforms;
+	int nuniforms;
+
+	// cached state
+	#if NANOVG_GL_USE_STATE_FILTER
+	GLuint boundTexture;
+	GLuint stencilMask;
+	GLenum stencilFunc;
+	GLint stencilFuncRef;
+	GLuint stencilFuncMask;
+	GLNVGblend blendFunc;
+	#endif
+
+	int dummyTex;
+};
+typedef struct GLNVGcontext GLNVGcontext;
+
+static int glnvg__maxi(int a, int b) { return a > b ? a : b; }
+
+#ifdef NANOVG_GLES2
+static unsigned int glnvg__nearestPow2(unsigned int num)
+{
+	unsigned n = num > 0 ? num - 1 : 0;
+	n |= n >> 1;
+	n |= n >> 2;
+	n |= n >> 4;
+	n |= n >> 8;
+	n |= n >> 16;
+	n++;
+	return n;
+}
+#endif
+
+static void glnvg__bindTexture(GLNVGcontext* gl, GLuint tex)
+{
+#if NANOVG_GL_USE_STATE_FILTER
+	if (gl->boundTexture != tex) {
+		gl->boundTexture = tex;
+		glBindTexture(GL_TEXTURE_2D, tex);
+	}
+#else
+	glBindTexture(GL_TEXTURE_2D, tex);
+#endif
+}
+
+static void glnvg__stencilMask(GLNVGcontext* gl, GLuint mask)
+{
+#if NANOVG_GL_USE_STATE_FILTER
+	if (gl->stencilMask != mask) {
+		gl->stencilMask = mask;
+		glStencilMask(mask);
+	}
+#else
+	glStencilMask(mask);
+#endif
+}
+
+static void glnvg__stencilFunc(GLNVGcontext* gl, GLenum func, GLint ref, GLuint mask)
+{
+#if NANOVG_GL_USE_STATE_FILTER
+	if ((gl->stencilFunc != func) ||
+		(gl->stencilFuncRef != ref) ||
+		(gl->stencilFuncMask != mask)) {
+
+		gl->stencilFunc = func;
+		gl->stencilFuncRef = ref;
+		gl->stencilFuncMask = mask;
+		glStencilFunc(func, ref, mask);
+	}
+#else
+	glStencilFunc(func, ref, mask);
+#endif
+}
+static void glnvg__blendFuncSeparate(GLNVGcontext* gl, const GLNVGblend* blend)
+{
+#if NANOVG_GL_USE_STATE_FILTER
+	if ((gl->blendFunc.srcRGB != blend->srcRGB) ||
+		(gl->blendFunc.dstRGB != blend->dstRGB) ||
+		(gl->blendFunc.srcAlpha != blend->srcAlpha) ||
+		(gl->blendFunc.dstAlpha != blend->dstAlpha)) {
+
+		gl->blendFunc = *blend;
+		glBlendFuncSeparate(blend->srcRGB, blend->dstRGB, blend->srcAlpha,blend->dstAlpha);
+	}
+#else
+	glBlendFuncSeparate(blend->srcRGB, blend->dstRGB, blend->srcAlpha,blend->dstAlpha);
+#endif
+}
+
+static GLNVGtexture* glnvg__allocTexture(GLNVGcontext* gl)
+{
+	GLNVGtexture* tex = NULL;
+	int i;
+
+	for (i = 0; i < gl->ntextures; i++) {
+		if (gl->textures[i].id == 0) {
+			tex = &gl->textures[i];
+			break;
+		}
+	}
+	if (tex == NULL) {
+		if (gl->ntextures+1 > gl->ctextures) {
+			GLNVGtexture* textures;
+			int ctextures = glnvg__maxi(gl->ntextures+1, 4) +  gl->ctextures/2; // 1.5x Overallocate
+			textures = (GLNVGtexture*)realloc(gl->textures, sizeof(GLNVGtexture)*ctextures);
+			if (textures == NULL) return NULL;
+			gl->textures = textures;
+			gl->ctextures = ctextures;
+		}
+		tex = &gl->textures[gl->ntextures++];
+	}
+
+	memset(tex, 0, sizeof(*tex));
+	tex->id = ++gl->textureId;
+
+	return tex;
+}
+
+static GLNVGtexture* glnvg__findTexture(GLNVGcontext* gl, int id)
+{
+	int i;
+	for (i = 0; i < gl->ntextures; i++)
+		if (gl->textures[i].id == id)
+			return &gl->textures[i];
+	return NULL;
+}
+
+static int glnvg__deleteTexture(GLNVGcontext* gl, int id)
+{
+	int i;
+	for (i = 0; i < gl->ntextures; i++) {
+		if (gl->textures[i].id == id) {
+			if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0)
+				glDeleteTextures(1, &gl->textures[i].tex);
+			memset(&gl->textures[i], 0, sizeof(gl->textures[i]));
+			return 1;
+		}
+	}
+	return 0;
+}
+
+static void glnvg__dumpShaderError(GLuint shader, const char* name, const char* type)
+{
+	GLchar str[512+1];
+	GLsizei len = 0;
+	glGetShaderInfoLog(shader, 512, &len, str);
+	if (len > 512) len = 512;
+	str[len] = '\0';
+	printf("Shader %s/%s error:\n%s\n", name, type, str);
+}
+
+static void glnvg__dumpProgramError(GLuint prog, const char* name)
+{
+	GLchar str[512+1];
+	GLsizei len = 0;
+	glGetProgramInfoLog(prog, 512, &len, str);
+	if (len > 512) len = 512;
+	str[len] = '\0';
+	printf("Program %s error:\n%s\n", name, str);
+}
+
+static void glnvg__checkError(GLNVGcontext* gl, const char* str)
+{
+	GLenum err;
+	if ((gl->flags & NVG_DEBUG) == 0) return;
+	err = glGetError();
+	if (err != GL_NO_ERROR) {
+		printf("Error %08x after %s\n", err, str);
+		return;
+	}
+}
+
+static int glnvg__createShader(GLNVGshader* shader, const char* name, const char* header, const char* opts, const char* vshader, const char* fshader)
+{
+	GLint status;
+	GLuint prog, vert, frag;
+	const char* str[3];
+	str[0] = header;
+	str[1] = opts != NULL ? opts : "";
+
+	memset(shader, 0, sizeof(*shader));
+
+	prog = glCreateProgram();
+	vert = glCreateShader(GL_VERTEX_SHADER);
+	frag = glCreateShader(GL_FRAGMENT_SHADER);
+	str[2] = vshader;
+	glShaderSource(vert, 3, str, 0);
+	str[2] = fshader;
+	glShaderSource(frag, 3, str, 0);
+
+	glCompileShader(vert);
+	glGetShaderiv(vert, GL_COMPILE_STATUS, &status);
+	if (status != GL_TRUE) {
+		glnvg__dumpShaderError(vert, name, "vert");
+		return 0;
+	}
+
+	glCompileShader(frag);
+	glGetShaderiv(frag, GL_COMPILE_STATUS, &status);
+	if (status != GL_TRUE) {
+		glnvg__dumpShaderError(frag, name, "frag");
+		return 0;
+	}
+
+	glAttachShader(prog, vert);
+	glAttachShader(prog, frag);
+
+	glBindAttribLocation(prog, 0, "vertex");
+	glBindAttribLocation(prog, 1, "tcoord");
+
+	glLinkProgram(prog);
+	glGetProgramiv(prog, GL_LINK_STATUS, &status);
+	if (status != GL_TRUE) {
+		glnvg__dumpProgramError(prog, name);
+		return 0;
+	}
+
+	shader->prog = prog;
+	shader->vert = vert;
+	shader->frag = frag;
+
+	return 1;
+}
+
+static void glnvg__deleteShader(GLNVGshader* shader)
+{
+	if (shader->prog != 0)
+		glDeleteProgram(shader->prog);
+	if (shader->vert != 0)
+		glDeleteShader(shader->vert);
+	if (shader->frag != 0)
+		glDeleteShader(shader->frag);
+}
+
+static void glnvg__getUniforms(GLNVGshader* shader)
+{
+	shader->loc[GLNVG_LOC_VIEWSIZE] = glGetUniformLocation(shader->prog, "viewSize");
+	shader->loc[GLNVG_LOC_TEX] = glGetUniformLocation(shader->prog, "tex");
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	shader->loc[GLNVG_LOC_FRAG] = glGetUniformBlockIndex(shader->prog, "frag");
+#else
+	shader->loc[GLNVG_LOC_FRAG] = glGetUniformLocation(shader->prog, "frag");
+#endif
+}
+
+static int glnvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data);
+
+static int glnvg__renderCreate(void* uptr)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	int align = 4;
+
+	// TODO: mediump float may not be enough for GLES2 in iOS.
+	// see the following discussion: https://github.com/memononen/nanovg/issues/46
+	static const char* shaderHeader =
+#if defined NANOVG_GL2
+		"#define NANOVG_GL2 1\n"
+#elif defined NANOVG_GL3
+		"#version 150 core\n"
+		"#define NANOVG_GL3 1\n"
+#elif defined NANOVG_GLES2
+		"#version 100\n"
+		"#define NANOVG_GL2 1\n"
+#elif defined NANOVG_GLES3
+		"#version 300 es\n"
+		"#define NANOVG_GL3 1\n"
+#endif
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	"#define USE_UNIFORMBUFFER 1\n"
+#else
+	"#define UNIFORMARRAY_SIZE 11\n"
+#endif
+	"\n";
+
+	static const char* fillVertShader =
+		"#ifdef NANOVG_GL3\n"
+		"	uniform vec2 viewSize;\n"
+		"	in vec2 vertex;\n"
+		"	in vec2 tcoord;\n"
+		"	out vec2 ftcoord;\n"
+		"	out vec2 fpos;\n"
+		"#else\n"
+		"	uniform vec2 viewSize;\n"
+		"	attribute vec2 vertex;\n"
+		"	attribute vec2 tcoord;\n"
+		"	varying vec2 ftcoord;\n"
+		"	varying vec2 fpos;\n"
+		"#endif\n"
+		"void main(void) {\n"
+		"	ftcoord = tcoord;\n"
+		"	fpos = vertex;\n"
+		"	gl_Position = vec4(2.0*vertex.x/viewSize.x - 1.0, 1.0 - 2.0*vertex.y/viewSize.y, 0, 1);\n"
+		"}\n";
+
+	static const char* fillFragShader =
+		"#ifdef GL_ES\n"
+		"#if defined(GL_FRAGMENT_PRECISION_HIGH) || defined(NANOVG_GL3)\n"
+		" precision highp float;\n"
+		"#else\n"
+		" precision mediump float;\n"
+		"#endif\n"
+		"#endif\n"
+		"#ifdef NANOVG_GL3\n"
+		"#ifdef USE_UNIFORMBUFFER\n"
+		"	layout(std140) uniform frag {\n"
+		"		mat3 scissorMat;\n"
+		"		mat3 paintMat;\n"
+		"		vec4 innerCol;\n"
+		"		vec4 outerCol;\n"
+		"		vec2 scissorExt;\n"
+		"		vec2 scissorScale;\n"
+		"		vec2 extent;\n"
+		"		float radius;\n"
+		"		float feather;\n"
+		"		float strokeMult;\n"
+		"		float strokeThr;\n"
+		"		int texType;\n"
+		"		int type;\n"
+		"	};\n"
+		"#else\n" // NANOVG_GL3 && !USE_UNIFORMBUFFER
+		"	uniform vec4 frag[UNIFORMARRAY_SIZE];\n"
+		"#endif\n"
+		"	uniform sampler2D tex;\n"
+		"	in vec2 ftcoord;\n"
+		"	in vec2 fpos;\n"
+		"	out vec4 outColor;\n"
+		"#else\n" // !NANOVG_GL3
+		"	uniform vec4 frag[UNIFORMARRAY_SIZE];\n"
+		"	uniform sampler2D tex;\n"
+		"	varying vec2 ftcoord;\n"
+		"	varying vec2 fpos;\n"
+		"#endif\n"
+		"#ifndef USE_UNIFORMBUFFER\n"
+		"	#define scissorMat mat3(frag[0].xyz, frag[1].xyz, frag[2].xyz)\n"
+		"	#define paintMat mat3(frag[3].xyz, frag[4].xyz, frag[5].xyz)\n"
+		"	#define innerCol frag[6]\n"
+		"	#define outerCol frag[7]\n"
+		"	#define scissorExt frag[8].xy\n"
+		"	#define scissorScale frag[8].zw\n"
+		"	#define extent frag[9].xy\n"
+		"	#define radius frag[9].z\n"
+		"	#define feather frag[9].w\n"
+		"	#define strokeMult frag[10].x\n"
+		"	#define strokeThr frag[10].y\n"
+		"	#define texType int(frag[10].z)\n"
+		"	#define type int(frag[10].w)\n"
+		"#endif\n"
+		"\n"
+		"float sdroundrect(vec2 pt, vec2 ext, float rad) {\n"
+		"	vec2 ext2 = ext - vec2(rad,rad);\n"
+		"	vec2 d = abs(pt) - ext2;\n"
+		"	return min(max(d.x,d.y),0.0) + length(max(d,0.0)) - rad;\n"
+		"}\n"
+		"\n"
+		"// Scissoring\n"
+		"float scissorMask(vec2 p) {\n"
+		"	vec2 sc = (abs((scissorMat * vec3(p,1.0)).xy) - scissorExt);\n"
+		"	sc = vec2(0.5,0.5) - sc * scissorScale;\n"
+		"	return clamp(sc.x,0.0,1.0) * clamp(sc.y,0.0,1.0);\n"
+		"}\n"
+		"#ifdef EDGE_AA\n"
+		"// Stroke - from [0..1] to clipped pyramid, where the slope is 1px.\n"
+		"float strokeMask() {\n"
+		"	return min(1.0, (1.0-abs(ftcoord.x*2.0-1.0))*strokeMult) * min(1.0, ftcoord.y);\n"
+		"}\n"
+		"#endif\n"
+		"\n"
+		"void main(void) {\n"
+		"   vec4 result;\n"
+		"	float scissor = scissorMask(fpos);\n"
+		"#ifdef EDGE_AA\n"
+		"	float strokeAlpha = strokeMask();\n"
+		"	if (strokeAlpha < strokeThr) discard;\n"
+		"#else\n"
+		"	float strokeAlpha = 1.0;\n"
+		"#endif\n"
+		"	if (type == 0) {			// Gradient\n"
+		"		// Calculate gradient color using box gradient\n"
+		"		vec2 pt = (paintMat * vec3(fpos,1.0)).xy;\n"
+		"		float d = clamp((sdroundrect(pt, extent, radius) + feather*0.5) / feather, 0.0, 1.0);\n"
+		"		vec4 color = mix(innerCol,outerCol,d);\n"
+		"		// Combine alpha\n"
+		"		color *= strokeAlpha * scissor;\n"
+		"		result = color;\n"
+		"	} else if (type == 1) {		// Image\n"
+		"		// Calculate color fron texture\n"
+		"		vec2 pt = (paintMat * vec3(fpos,1.0)).xy / extent;\n"
+		"#ifdef NANOVG_GL3\n"
+		"		vec4 color = texture(tex, pt);\n"
+		"#else\n"
+		"		vec4 color = texture2D(tex, pt);\n"
+		"#endif\n"
+		"		if (texType == 1) color = vec4(color.xyz*color.w,color.w);"
+		"		if (texType == 2) color = vec4(color.x);"
+		"		// Apply color tint and alpha.\n"
+		"		color *= innerCol;\n"
+		"		// Combine alpha\n"
+		"		color *= strokeAlpha * scissor;\n"
+		"		result = color;\n"
+		"	} else if (type == 2) {		// Stencil fill\n"
+		"		result = vec4(1,1,1,1);\n"
+		"	} else if (type == 3) {		// Textured tris\n"
+		"#ifdef NANOVG_GL3\n"
+		"		vec4 color = texture(tex, ftcoord);\n"
+		"#else\n"
+		"		vec4 color = texture2D(tex, ftcoord);\n"
+		"#endif\n"
+		"		if (texType == 1) color = vec4(color.xyz*color.w,color.w);"
+		"		if (texType == 2) color = vec4(color.x);"
+		"		color *= scissor;\n"
+		"		result = color * innerCol;\n"
+		"	}\n"
+		"#ifdef NANOVG_GL3\n"
+		"	outColor = result;\n"
+		"#else\n"
+		"	gl_FragColor = result;\n"
+		"#endif\n"
+		"}\n";
+
+	glnvg__checkError(gl, "init");
+
+	if (gl->flags & NVG_ANTIALIAS) {
+		if (glnvg__createShader(&gl->shader, "shader", shaderHeader, "#define EDGE_AA 1\n", fillVertShader, fillFragShader) == 0)
+			return 0;
+	} else {
+		if (glnvg__createShader(&gl->shader, "shader", shaderHeader, NULL, fillVertShader, fillFragShader) == 0)
+			return 0;
+	}
+
+	glnvg__checkError(gl, "uniform locations");
+	glnvg__getUniforms(&gl->shader);
+
+	// Create dynamic vertex array
+#if defined NANOVG_GL3
+	glGenVertexArrays(1, &gl->vertArr);
+#endif
+	glGenBuffers(1, &gl->vertBuf);
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	// Create UBOs
+	glUniformBlockBinding(gl->shader.prog, gl->shader.loc[GLNVG_LOC_FRAG], GLNVG_FRAG_BINDING);
+	glGenBuffers(1, &gl->fragBuf);
+	glGetIntegerv(GL_UNIFORM_BUFFER_OFFSET_ALIGNMENT, &align);
+#endif
+	gl->fragSize = sizeof(GLNVGfragUniforms) + align - sizeof(GLNVGfragUniforms) % align;
+
+	// Some platforms does not allow to have samples to unset textures.
+	// Create empty one which is bound when there's no texture specified.
+	gl->dummyTex = glnvg__renderCreateTexture(gl, NVG_TEXTURE_ALPHA, 1, 1, 0, NULL);
+
+	glnvg__checkError(gl, "create done");
+
+	glFinish();
+
+	return 1;
+}
+
+static int glnvg__renderCreateTexture(void* uptr, int type, int w, int h, int imageFlags, const unsigned char* data)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGtexture* tex = glnvg__allocTexture(gl);
+
+	if (tex == NULL) return 0;
+
+#ifdef NANOVG_GLES2
+	// Check for non-power of 2.
+	if (glnvg__nearestPow2(w) != (unsigned int)w || glnvg__nearestPow2(h) != (unsigned int)h) {
+		// No repeat
+		if ((imageFlags & NVG_IMAGE_REPEATX) != 0 || (imageFlags & NVG_IMAGE_REPEATY) != 0) {
+			printf("Repeat X/Y is not supported for non power-of-two textures (%d x %d)\n", w, h);
+			imageFlags &= ~(NVG_IMAGE_REPEATX | NVG_IMAGE_REPEATY);
+		}
+		// No mips.
+		if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
+			printf("Mip-maps is not support for non power-of-two textures (%d x %d)\n", w, h);
+			imageFlags &= ~NVG_IMAGE_GENERATE_MIPMAPS;
+		}
+	}
+#endif
+
+	glGenTextures(1, &tex->tex);
+	tex->width = w;
+	tex->height = h;
+	tex->type = type;
+	tex->flags = imageFlags;
+	glnvg__bindTexture(gl, tex->tex);
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT,1);
+#ifndef NANOVG_GLES2
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width);
+	glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+	glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+#endif
+
+#if defined (NANOVG_GL2)
+	// GL 1.4 and later has support for generating mipmaps using a tex parameter.
+	if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
+		glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
+	}
+#endif
+
+	if (type == NVG_TEXTURE_RGBA)
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	else
+#if defined(NANOVG_GLES2) || defined (NANOVG_GL2)
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, w, h, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
+#elif defined(NANOVG_GLES3)
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data);
+#else
+		glTexImage2D(GL_TEXTURE_2D, 0, GL_RED, w, h, 0, GL_RED, GL_UNSIGNED_BYTE, data);
+#endif
+
+	if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
+		if (imageFlags & NVG_IMAGE_NEAREST) {
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);
+		} else {
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
+		}
+	} else {
+		if (imageFlags & NVG_IMAGE_NEAREST) {
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+		} else {
+			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+		}
+	}
+
+	if (imageFlags & NVG_IMAGE_NEAREST) {
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	} else {
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+	}
+
+	if (imageFlags & NVG_IMAGE_REPEATX)
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	else
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+
+	if (imageFlags & NVG_IMAGE_REPEATY)
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	else
+		glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+#ifndef NANOVG_GLES2
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+	glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+	glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+#endif
+
+	// The new way to build mipmaps on GLES and GL3
+#if !defined(NANOVG_GL2)
+	if (imageFlags & NVG_IMAGE_GENERATE_MIPMAPS) {
+		glGenerateMipmap(GL_TEXTURE_2D);
+	}
+#endif
+
+	glnvg__checkError(gl, "create tex");
+	glnvg__bindTexture(gl, 0);
+
+	return tex->id;
+}
+
+
+static int glnvg__renderDeleteTexture(void* uptr, int image)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	return glnvg__deleteTexture(gl, image);
+}
+
+static int glnvg__renderUpdateTexture(void* uptr, int image, int x, int y, int w, int h, const unsigned char* data)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGtexture* tex = glnvg__findTexture(gl, image);
+
+	if (tex == NULL) return 0;
+	glnvg__bindTexture(gl, tex->tex);
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT,1);
+
+#ifndef NANOVG_GLES2
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, tex->width);
+	glPixelStorei(GL_UNPACK_SKIP_PIXELS, x);
+	glPixelStorei(GL_UNPACK_SKIP_ROWS, y);
+#else
+	// No support for all of skip, need to update a whole row at a time.
+	if (tex->type == NVG_TEXTURE_RGBA)
+		data += y*tex->width*4;
+	else
+		data += y*tex->width;
+	x = 0;
+	w = tex->width;
+#endif
+
+	if (tex->type == NVG_TEXTURE_RGBA)
+		glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RGBA, GL_UNSIGNED_BYTE, data);
+	else
+#if defined(NANOVG_GLES2) || defined(NANOVG_GL2)
+		glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_LUMINANCE, GL_UNSIGNED_BYTE, data);
+#else
+		glTexSubImage2D(GL_TEXTURE_2D, 0, x,y, w,h, GL_RED, GL_UNSIGNED_BYTE, data);
+#endif
+
+	glPixelStorei(GL_UNPACK_ALIGNMENT, 4);
+#ifndef NANOVG_GLES2
+	glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+	glPixelStorei(GL_UNPACK_SKIP_PIXELS, 0);
+	glPixelStorei(GL_UNPACK_SKIP_ROWS, 0);
+#endif
+
+	glnvg__bindTexture(gl, 0);
+
+	return 1;
+}
+
+static int glnvg__renderGetTextureSize(void* uptr, int image, int* w, int* h)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGtexture* tex = glnvg__findTexture(gl, image);
+	if (tex == NULL) return 0;
+	*w = tex->width;
+	*h = tex->height;
+	return 1;
+}
+
+static void glnvg__xformToMat3x4(float* m3, float* t)
+{
+	m3[0] = t[0];
+	m3[1] = t[1];
+	m3[2] = 0.0f;
+	m3[3] = 0.0f;
+	m3[4] = t[2];
+	m3[5] = t[3];
+	m3[6] = 0.0f;
+	m3[7] = 0.0f;
+	m3[8] = t[4];
+	m3[9] = t[5];
+	m3[10] = 1.0f;
+	m3[11] = 0.0f;
+}
+
+static NVGcolor glnvg__premulColor(NVGcolor c)
+{
+	c.r *= c.a;
+	c.g *= c.a;
+	c.b *= c.a;
+	return c;
+}
+
+static int glnvg__convertPaint(GLNVGcontext* gl, GLNVGfragUniforms* frag, NVGpaint* paint,
+							   NVGscissor* scissor, float width, float fringe, float strokeThr)
+{
+	GLNVGtexture* tex = NULL;
+	float invxform[6];
+
+	memset(frag, 0, sizeof(*frag));
+
+	frag->innerCol = glnvg__premulColor(paint->innerColor);
+	frag->outerCol = glnvg__premulColor(paint->outerColor);
+
+	if (scissor->extent[0] < -0.5f || scissor->extent[1] < -0.5f) {
+		memset(frag->scissorMat, 0, sizeof(frag->scissorMat));
+		frag->scissorExt[0] = 1.0f;
+		frag->scissorExt[1] = 1.0f;
+		frag->scissorScale[0] = 1.0f;
+		frag->scissorScale[1] = 1.0f;
+	} else {
+		nvgTransformInverse(invxform, scissor->xform);
+		glnvg__xformToMat3x4(frag->scissorMat, invxform);
+		frag->scissorExt[0] = scissor->extent[0];
+		frag->scissorExt[1] = scissor->extent[1];
+		frag->scissorScale[0] = sqrtf(scissor->xform[0]*scissor->xform[0] + scissor->xform[2]*scissor->xform[2]) / fringe;
+		frag->scissorScale[1] = sqrtf(scissor->xform[1]*scissor->xform[1] + scissor->xform[3]*scissor->xform[3]) / fringe;
+	}
+
+	memcpy(frag->extent, paint->extent, sizeof(frag->extent));
+	frag->strokeMult = (width*0.5f + fringe*0.5f) / fringe;
+	frag->strokeThr = strokeThr;
+
+	if (paint->image != 0) {
+		tex = glnvg__findTexture(gl, paint->image);
+		if (tex == NULL) return 0;
+		if ((tex->flags & NVG_IMAGE_FLIPY) != 0) {
+			float m1[6], m2[6];
+			nvgTransformTranslate(m1, 0.0f, frag->extent[1] * 0.5f);
+			nvgTransformMultiply(m1, paint->xform);
+			nvgTransformScale(m2, 1.0f, -1.0f);
+			nvgTransformMultiply(m2, m1);
+			nvgTransformTranslate(m1, 0.0f, -frag->extent[1] * 0.5f);
+			nvgTransformMultiply(m1, m2);
+			nvgTransformInverse(invxform, m1);
+		} else {
+			nvgTransformInverse(invxform, paint->xform);
+		}
+		frag->type = NSVG_SHADER_FILLIMG;
+
+		#if NANOVG_GL_USE_UNIFORMBUFFER
+		if (tex->type == NVG_TEXTURE_RGBA)
+			frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0 : 1;
+		else
+			frag->texType = 2;
+		#else
+		if (tex->type == NVG_TEXTURE_RGBA)
+			frag->texType = (tex->flags & NVG_IMAGE_PREMULTIPLIED) ? 0.0f : 1.0f;
+		else
+			frag->texType = 2.0f;
+		#endif
+//		printf("frag->texType = %d\n", frag->texType);
+	} else {
+		frag->type = NSVG_SHADER_FILLGRAD;
+		frag->radius = paint->radius;
+		frag->feather = paint->feather;
+		nvgTransformInverse(invxform, paint->xform);
+	}
+
+	glnvg__xformToMat3x4(frag->paintMat, invxform);
+
+	return 1;
+}
+
+static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i);
+
+static void glnvg__setUniforms(GLNVGcontext* gl, int uniformOffset, int image)
+{
+	GLNVGtexture* tex = NULL;
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	glBindBufferRange(GL_UNIFORM_BUFFER, GLNVG_FRAG_BINDING, gl->fragBuf, uniformOffset, sizeof(GLNVGfragUniforms));
+#else
+	GLNVGfragUniforms* frag = nvg__fragUniformPtr(gl, uniformOffset);
+	glUniform4fv(gl->shader.loc[GLNVG_LOC_FRAG], NANOVG_GL_UNIFORMARRAY_SIZE, &(frag->uniformArray[0][0]));
+#endif
+
+	if (image != 0) {
+		tex = glnvg__findTexture(gl, image);
+	}
+	// If no image is set, use empty texture
+	if (tex == NULL) {
+		tex = glnvg__findTexture(gl, gl->dummyTex);
+	}
+	glnvg__bindTexture(gl, tex != NULL ? tex->tex : 0);
+	glnvg__checkError(gl, "tex paint tex");
+}
+
+static void glnvg__renderViewport(void* uptr, float width, float height, float devicePixelRatio)
+{
+	NVG_NOTUSED(devicePixelRatio);
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	gl->view[0] = width;
+	gl->view[1] = height;
+}
+
+static void glnvg__fill(GLNVGcontext* gl, GLNVGcall* call)
+{
+	GLNVGpath* paths = &gl->paths[call->pathOffset];
+	int i, npaths = call->pathCount;
+
+	// Draw shapes
+	glEnable(GL_STENCIL_TEST);
+	glnvg__stencilMask(gl, 0xff);
+	glnvg__stencilFunc(gl, GL_ALWAYS, 0, 0xff);
+	glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+
+	// set bindpoint for solid loc
+	glnvg__setUniforms(gl, call->uniformOffset, 0);
+	glnvg__checkError(gl, "fill simple");
+
+	glStencilOpSeparate(GL_FRONT, GL_KEEP, GL_KEEP, GL_INCR_WRAP);
+	glStencilOpSeparate(GL_BACK, GL_KEEP, GL_KEEP, GL_DECR_WRAP);
+	glDisable(GL_CULL_FACE);
+	for (i = 0; i < npaths; i++)
+		glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount);
+	glEnable(GL_CULL_FACE);
+
+	// Draw anti-aliased pixels
+	glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+
+	glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image);
+	glnvg__checkError(gl, "fill fill");
+
+	if (gl->flags & NVG_ANTIALIAS) {
+		glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff);
+		glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+		// Draw fringes
+		for (i = 0; i < npaths; i++)
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+	}
+
+	// Draw fill
+	glnvg__stencilFunc(gl, GL_NOTEQUAL, 0x0, 0xff);
+	glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
+	glDrawArrays(GL_TRIANGLE_STRIP, call->triangleOffset, call->triangleCount);
+
+	glDisable(GL_STENCIL_TEST);
+}
+
+static void glnvg__convexFill(GLNVGcontext* gl, GLNVGcall* call)
+{
+	GLNVGpath* paths = &gl->paths[call->pathOffset];
+	int i, npaths = call->pathCount;
+
+	glnvg__setUniforms(gl, call->uniformOffset, call->image);
+	glnvg__checkError(gl, "convex fill");
+
+	for (i = 0; i < npaths; i++) {
+		glDrawArrays(GL_TRIANGLE_FAN, paths[i].fillOffset, paths[i].fillCount);
+		// Draw fringes
+		if (paths[i].strokeCount > 0) {
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+		}
+	}
+}
+
+static void glnvg__stroke(GLNVGcontext* gl, GLNVGcall* call)
+{
+	GLNVGpath* paths = &gl->paths[call->pathOffset];
+	int npaths = call->pathCount, i;
+
+	if (gl->flags & NVG_STENCIL_STROKES) {
+
+		glEnable(GL_STENCIL_TEST);
+		glnvg__stencilMask(gl, 0xff);
+
+		// Fill the stroke base without overlap
+		glnvg__stencilFunc(gl, GL_EQUAL, 0x0, 0xff);
+		glStencilOp(GL_KEEP, GL_KEEP, GL_INCR);
+		glnvg__setUniforms(gl, call->uniformOffset + gl->fragSize, call->image);
+		glnvg__checkError(gl, "stroke fill 0");
+		for (i = 0; i < npaths; i++)
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+
+		// Draw anti-aliased pixels.
+		glnvg__setUniforms(gl, call->uniformOffset, call->image);
+		glnvg__stencilFunc(gl, GL_EQUAL, 0x00, 0xff);
+		glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+		for (i = 0; i < npaths; i++)
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+
+		// Clear stencil buffer.
+		glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+		glnvg__stencilFunc(gl, GL_ALWAYS, 0x0, 0xff);
+		glStencilOp(GL_ZERO, GL_ZERO, GL_ZERO);
+		glnvg__checkError(gl, "stroke fill 1");
+		for (i = 0; i < npaths; i++)
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+		glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+
+		glDisable(GL_STENCIL_TEST);
+
+//		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f);
+
+	} else {
+		glnvg__setUniforms(gl, call->uniformOffset, call->image);
+		glnvg__checkError(gl, "stroke fill");
+		// Draw Strokes
+		for (i = 0; i < npaths; i++)
+			glDrawArrays(GL_TRIANGLE_STRIP, paths[i].strokeOffset, paths[i].strokeCount);
+	}
+}
+
+static void glnvg__triangles(GLNVGcontext* gl, GLNVGcall* call)
+{
+	glnvg__setUniforms(gl, call->uniformOffset, call->image);
+	glnvg__checkError(gl, "triangles fill");
+
+	glDrawArrays(GL_TRIANGLES, call->triangleOffset, call->triangleCount);
+}
+
+static void glnvg__renderCancel(void* uptr) {
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	gl->nverts = 0;
+	gl->npaths = 0;
+	gl->ncalls = 0;
+	gl->nuniforms = 0;
+}
+
+static GLenum glnvg_convertBlendFuncFactor(int factor)
+{
+	if (factor == NVG_ZERO)
+		return GL_ZERO;
+	if (factor == NVG_ONE)
+		return GL_ONE;
+	if (factor == NVG_SRC_COLOR)
+		return GL_SRC_COLOR;
+	if (factor == NVG_ONE_MINUS_SRC_COLOR)
+		return GL_ONE_MINUS_SRC_COLOR;
+	if (factor == NVG_DST_COLOR)
+		return GL_DST_COLOR;
+	if (factor == NVG_ONE_MINUS_DST_COLOR)
+		return GL_ONE_MINUS_DST_COLOR;
+	if (factor == NVG_SRC_ALPHA)
+		return GL_SRC_ALPHA;
+	if (factor == NVG_ONE_MINUS_SRC_ALPHA)
+		return GL_ONE_MINUS_SRC_ALPHA;
+	if (factor == NVG_DST_ALPHA)
+		return GL_DST_ALPHA;
+	if (factor == NVG_ONE_MINUS_DST_ALPHA)
+		return GL_ONE_MINUS_DST_ALPHA;
+	if (factor == NVG_SRC_ALPHA_SATURATE)
+		return GL_SRC_ALPHA_SATURATE;
+	return GL_INVALID_ENUM;
+}
+
+static GLNVGblend glnvg__blendCompositeOperation(NVGcompositeOperationState op)
+{
+	GLNVGblend blend;
+	blend.srcRGB = glnvg_convertBlendFuncFactor(op.srcRGB);
+	blend.dstRGB = glnvg_convertBlendFuncFactor(op.dstRGB);
+	blend.srcAlpha = glnvg_convertBlendFuncFactor(op.srcAlpha);
+	blend.dstAlpha = glnvg_convertBlendFuncFactor(op.dstAlpha);
+	if (blend.srcRGB == GL_INVALID_ENUM || blend.dstRGB == GL_INVALID_ENUM || blend.srcAlpha == GL_INVALID_ENUM || blend.dstAlpha == GL_INVALID_ENUM)
+	{
+		blend.srcRGB = GL_ONE;
+		blend.dstRGB = GL_ONE_MINUS_SRC_ALPHA;
+		blend.srcAlpha = GL_ONE;
+		blend.dstAlpha = GL_ONE_MINUS_SRC_ALPHA;
+	}
+	return blend;
+}
+
+static void glnvg__renderFlush(void* uptr)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	int i;
+
+	if (gl->ncalls > 0) {
+
+		// Setup require GL state.
+		glUseProgram(gl->shader.prog);
+
+		glEnable(GL_CULL_FACE);
+		glCullFace(GL_BACK);
+		glFrontFace(GL_CCW);
+		glEnable(GL_BLEND);
+		glDisable(GL_DEPTH_TEST);
+		glDisable(GL_SCISSOR_TEST);
+		glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+		glStencilMask(0xffffffff);
+		glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP);
+		glStencilFunc(GL_ALWAYS, 0, 0xffffffff);
+		glActiveTexture(GL_TEXTURE0);
+		glBindTexture(GL_TEXTURE_2D, 0);
+		#if NANOVG_GL_USE_STATE_FILTER
+		gl->boundTexture = 0;
+		gl->stencilMask = 0xffffffff;
+		gl->stencilFunc = GL_ALWAYS;
+		gl->stencilFuncRef = 0;
+		gl->stencilFuncMask = 0xffffffff;
+		gl->blendFunc.srcRGB = GL_INVALID_ENUM;
+		gl->blendFunc.srcAlpha = GL_INVALID_ENUM;
+		gl->blendFunc.dstRGB = GL_INVALID_ENUM;
+		gl->blendFunc.dstAlpha = GL_INVALID_ENUM;
+		#endif
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+		// Upload ubo for frag shaders
+		glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf);
+		glBufferData(GL_UNIFORM_BUFFER, gl->nuniforms * gl->fragSize, gl->uniforms, GL_STREAM_DRAW);
+#endif
+
+		// Upload vertex data
+#if defined NANOVG_GL3
+		glBindVertexArray(gl->vertArr);
+#endif
+		glBindBuffer(GL_ARRAY_BUFFER, gl->vertBuf);
+		glBufferData(GL_ARRAY_BUFFER, gl->nverts * sizeof(NVGvertex), gl->verts, GL_STREAM_DRAW);
+		glEnableVertexAttribArray(0);
+		glEnableVertexAttribArray(1);
+		glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(size_t)0);
+		glVertexAttribPointer(1, 2, GL_FLOAT, GL_FALSE, sizeof(NVGvertex), (const GLvoid*)(0 + 2*sizeof(float)));
+
+		// Set view and texture just once per frame.
+		glUniform1i(gl->shader.loc[GLNVG_LOC_TEX], 0);
+		glUniform2fv(gl->shader.loc[GLNVG_LOC_VIEWSIZE], 1, gl->view);
+
+#if NANOVG_GL_USE_UNIFORMBUFFER
+		glBindBuffer(GL_UNIFORM_BUFFER, gl->fragBuf);
+#endif
+
+		for (i = 0; i < gl->ncalls; i++) {
+			GLNVGcall* call = &gl->calls[i];
+			glnvg__blendFuncSeparate(gl,&call->blendFunc);
+			if (call->type == GLNVG_FILL)
+				glnvg__fill(gl, call);
+			else if (call->type == GLNVG_CONVEXFILL)
+				glnvg__convexFill(gl, call);
+			else if (call->type == GLNVG_STROKE)
+				glnvg__stroke(gl, call);
+			else if (call->type == GLNVG_TRIANGLES)
+				glnvg__triangles(gl, call);
+		}
+
+		glDisableVertexAttribArray(0);
+		glDisableVertexAttribArray(1);
+#if defined NANOVG_GL3
+		glBindVertexArray(0);
+#endif
+		glDisable(GL_CULL_FACE);
+			glBindBuffer(GL_ARRAY_BUFFER, 0);
+		glUseProgram(0);
+		glnvg__bindTexture(gl, 0);
+	}
+
+	// Reset calls
+	gl->nverts = 0;
+	gl->npaths = 0;
+	gl->ncalls = 0;
+	gl->nuniforms = 0;
+}
+
+static int glnvg__maxVertCount(const NVGpath* paths, int npaths)
+{
+	int i, count = 0;
+	for (i = 0; i < npaths; i++) {
+		count += paths[i].nfill;
+		count += paths[i].nstroke;
+	}
+	return count;
+}
+
+static GLNVGcall* glnvg__allocCall(GLNVGcontext* gl)
+{
+	GLNVGcall* ret = NULL;
+	if (gl->ncalls+1 > gl->ccalls) {
+		GLNVGcall* calls;
+		int ccalls = glnvg__maxi(gl->ncalls+1, 128) + gl->ccalls/2; // 1.5x Overallocate
+		calls = (GLNVGcall*)realloc(gl->calls, sizeof(GLNVGcall) * ccalls);
+		if (calls == NULL) return NULL;
+		gl->calls = calls;
+		gl->ccalls = ccalls;
+	}
+	ret = &gl->calls[gl->ncalls++];
+	memset(ret, 0, sizeof(GLNVGcall));
+	return ret;
+}
+
+static int glnvg__allocPaths(GLNVGcontext* gl, int n)
+{
+	int ret = 0;
+	if (gl->npaths+n > gl->cpaths) {
+		GLNVGpath* paths;
+		int cpaths = glnvg__maxi(gl->npaths + n, 128) + gl->cpaths/2; // 1.5x Overallocate
+		paths = (GLNVGpath*)realloc(gl->paths, sizeof(GLNVGpath) * cpaths);
+		if (paths == NULL) return -1;
+		gl->paths = paths;
+		gl->cpaths = cpaths;
+	}
+	ret = gl->npaths;
+	gl->npaths += n;
+	return ret;
+}
+
+static int glnvg__allocVerts(GLNVGcontext* gl, int n)
+{
+	int ret = 0;
+	if (gl->nverts+n > gl->cverts) {
+		NVGvertex* verts;
+		int cverts = glnvg__maxi(gl->nverts + n, 4096) + gl->cverts/2; // 1.5x Overallocate
+		verts = (NVGvertex*)realloc(gl->verts, sizeof(NVGvertex) * cverts);
+		if (verts == NULL) return -1;
+		gl->verts = verts;
+		gl->cverts = cverts;
+	}
+	ret = gl->nverts;
+	gl->nverts += n;
+	return ret;
+}
+
+static int glnvg__allocFragUniforms(GLNVGcontext* gl, int n)
+{
+	int ret = 0, structSize = gl->fragSize;
+	if (gl->nuniforms+n > gl->cuniforms) {
+		unsigned char* uniforms;
+		int cuniforms = glnvg__maxi(gl->nuniforms+n, 128) + gl->cuniforms/2; // 1.5x Overallocate
+		uniforms = (unsigned char*)realloc(gl->uniforms, structSize * cuniforms);
+		if (uniforms == NULL) return -1;
+		gl->uniforms = uniforms;
+		gl->cuniforms = cuniforms;
+	}
+	ret = gl->nuniforms * structSize;
+	gl->nuniforms += n;
+	return ret;
+}
+
+static GLNVGfragUniforms* nvg__fragUniformPtr(GLNVGcontext* gl, int i)
+{
+	return (GLNVGfragUniforms*)&gl->uniforms[i];
+}
+
+static void glnvg__vset(NVGvertex* vtx, float x, float y, float u, float v)
+{
+	vtx->x = x;
+	vtx->y = y;
+	vtx->u = u;
+	vtx->v = v;
+}
+
+static void glnvg__renderFill(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe,
+							  const float* bounds, const NVGpath* paths, int npaths)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGcall* call = glnvg__allocCall(gl);
+	NVGvertex* quad;
+	GLNVGfragUniforms* frag;
+	int i, maxverts, offset;
+
+	if (call == NULL) return;
+
+	call->type = GLNVG_FILL;
+	call->triangleCount = 4;
+	call->pathOffset = glnvg__allocPaths(gl, npaths);
+	if (call->pathOffset == -1) goto error;
+	call->pathCount = npaths;
+	call->image = paint->image;
+	call->blendFunc = glnvg__blendCompositeOperation(compositeOperation);
+
+	if (npaths == 1 && paths[0].convex)
+	{
+		call->type = GLNVG_CONVEXFILL;
+		call->triangleCount = 0;	// Bounding box fill quad not needed for convex fill
+	}
+
+	// Allocate vertices for all the paths.
+	maxverts = glnvg__maxVertCount(paths, npaths) + call->triangleCount;
+	offset = glnvg__allocVerts(gl, maxverts);
+	if (offset == -1) goto error;
+
+	for (i = 0; i < npaths; i++) {
+		GLNVGpath* copy = &gl->paths[call->pathOffset + i];
+		const NVGpath* path = &paths[i];
+		memset(copy, 0, sizeof(GLNVGpath));
+		if (path->nfill > 0) {
+			copy->fillOffset = offset;
+			copy->fillCount = path->nfill;
+			memcpy(&gl->verts[offset], path->fill, sizeof(NVGvertex) * path->nfill);
+			offset += path->nfill;
+		}
+		if (path->nstroke > 0) {
+			copy->strokeOffset = offset;
+			copy->strokeCount = path->nstroke;
+			memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke);
+			offset += path->nstroke;
+		}
+	}
+
+	// Setup uniforms for draw calls
+	if (call->type == GLNVG_FILL) {
+		// Quad
+		call->triangleOffset = offset;
+		quad = &gl->verts[call->triangleOffset];
+		glnvg__vset(&quad[0], bounds[2], bounds[3], 0.5f, 1.0f);
+		glnvg__vset(&quad[1], bounds[2], bounds[1], 0.5f, 1.0f);
+		glnvg__vset(&quad[2], bounds[0], bounds[3], 0.5f, 1.0f);
+		glnvg__vset(&quad[3], bounds[0], bounds[1], 0.5f, 1.0f);
+
+		call->uniformOffset = glnvg__allocFragUniforms(gl, 2);
+		if (call->uniformOffset == -1) goto error;
+		// Simple shader for stencil
+		frag = nvg__fragUniformPtr(gl, call->uniformOffset);
+		memset(frag, 0, sizeof(*frag));
+		frag->strokeThr = -1.0f;
+		frag->type = NSVG_SHADER_SIMPLE;
+		// Fill shader
+		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, fringe, fringe, -1.0f);
+	} else {
+		call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
+		if (call->uniformOffset == -1) goto error;
+		// Fill shader
+		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, fringe, fringe, -1.0f);
+	}
+
+	return;
+
+error:
+	// We get here if call alloc was ok, but something else is not.
+	// Roll back the last call to prevent drawing it.
+	if (gl->ncalls > 0) gl->ncalls--;
+}
+
+static void glnvg__renderStroke(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor, float fringe,
+								float strokeWidth, const NVGpath* paths, int npaths)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGcall* call = glnvg__allocCall(gl);
+	int i, maxverts, offset;
+
+	if (call == NULL) return;
+
+	call->type = GLNVG_STROKE;
+	call->pathOffset = glnvg__allocPaths(gl, npaths);
+	if (call->pathOffset == -1) goto error;
+	call->pathCount = npaths;
+	call->image = paint->image;
+	call->blendFunc = glnvg__blendCompositeOperation(compositeOperation);
+
+	// Allocate vertices for all the paths.
+	maxverts = glnvg__maxVertCount(paths, npaths);
+	offset = glnvg__allocVerts(gl, maxverts);
+	if (offset == -1) goto error;
+
+	for (i = 0; i < npaths; i++) {
+		GLNVGpath* copy = &gl->paths[call->pathOffset + i];
+		const NVGpath* path = &paths[i];
+		memset(copy, 0, sizeof(GLNVGpath));
+		if (path->nstroke) {
+			copy->strokeOffset = offset;
+			copy->strokeCount = path->nstroke;
+			memcpy(&gl->verts[offset], path->stroke, sizeof(NVGvertex) * path->nstroke);
+			offset += path->nstroke;
+		}
+	}
+
+	if (gl->flags & NVG_STENCIL_STROKES) {
+		// Fill shader
+		call->uniformOffset = glnvg__allocFragUniforms(gl, 2);
+		if (call->uniformOffset == -1) goto error;
+
+		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f);
+		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset + gl->fragSize), paint, scissor, strokeWidth, fringe, 1.0f - 0.5f/255.0f);
+
+	} else {
+		// Fill shader
+		call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
+		if (call->uniformOffset == -1) goto error;
+		glnvg__convertPaint(gl, nvg__fragUniformPtr(gl, call->uniformOffset), paint, scissor, strokeWidth, fringe, -1.0f);
+	}
+
+	return;
+
+error:
+	// We get here if call alloc was ok, but something else is not.
+	// Roll back the last call to prevent drawing it.
+	if (gl->ncalls > 0) gl->ncalls--;
+}
+
+static void glnvg__renderTriangles(void* uptr, NVGpaint* paint, NVGcompositeOperationState compositeOperation, NVGscissor* scissor,
+								   const NVGvertex* verts, int nverts, float fringe)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	GLNVGcall* call = glnvg__allocCall(gl);
+	GLNVGfragUniforms* frag;
+
+	if (call == NULL) return;
+
+	call->type = GLNVG_TRIANGLES;
+	call->image = paint->image;
+	call->blendFunc = glnvg__blendCompositeOperation(compositeOperation);
+
+	// Allocate vertices for all the paths.
+	call->triangleOffset = glnvg__allocVerts(gl, nverts);
+	if (call->triangleOffset == -1) goto error;
+	call->triangleCount = nverts;
+
+	memcpy(&gl->verts[call->triangleOffset], verts, sizeof(NVGvertex) * nverts);
+
+	// Fill shader
+	call->uniformOffset = glnvg__allocFragUniforms(gl, 1);
+	if (call->uniformOffset == -1) goto error;
+	frag = nvg__fragUniformPtr(gl, call->uniformOffset);
+	glnvg__convertPaint(gl, frag, paint, scissor, 1.0f, fringe, -1.0f);
+	frag->type = NSVG_SHADER_IMG;
+
+	return;
+
+error:
+	// We get here if call alloc was ok, but something else is not.
+	// Roll back the last call to prevent drawing it.
+	if (gl->ncalls > 0) gl->ncalls--;
+}
+
+static void glnvg__renderDelete(void* uptr)
+{
+	GLNVGcontext* gl = (GLNVGcontext*)uptr;
+	int i;
+	if (gl == NULL) return;
+
+	glnvg__deleteShader(&gl->shader);
+
+#if NANOVG_GL3
+#if NANOVG_GL_USE_UNIFORMBUFFER
+	if (gl->fragBuf != 0)
+		glDeleteBuffers(1, &gl->fragBuf);
+#endif
+	if (gl->vertArr != 0)
+		glDeleteVertexArrays(1, &gl->vertArr);
+#endif
+	if (gl->vertBuf != 0)
+		glDeleteBuffers(1, &gl->vertBuf);
+
+	for (i = 0; i < gl->ntextures; i++) {
+		if (gl->textures[i].tex != 0 && (gl->textures[i].flags & NVG_IMAGE_NODELETE) == 0)
+			glDeleteTextures(1, &gl->textures[i].tex);
+	}
+	free(gl->textures);
+
+	free(gl->paths);
+	free(gl->verts);
+	free(gl->uniforms);
+	free(gl->calls);
+
+	free(gl);
+}
+
+
+#if defined NANOVG_GL2
+NVGcontext* nvgCreateGL2(int flags)
+#elif defined NANOVG_GL3
+NVGcontext* nvgCreateGL3(int flags)
+#elif defined NANOVG_GLES2
+NVGcontext* nvgCreateGLES2(int flags)
+#elif defined NANOVG_GLES3
+NVGcontext* nvgCreateGLES3(int flags)
+#endif
+{
+	#ifdef NANOVG_USE_GLEW
+	if (!glew_initialized) {
+		if (glewInit() == GLEW_OK) {
+			glew_initialized = 1;
+		} else {
+			printf("Failed to initialize GLEW");
+			// GLEW generates GL error because it calls glGetString(GL_EXTENSIONS), we'll consume it here.
+			glGetError();
+		}
+	}
+	#endif
+
+	NVGparams params;
+	NVGcontext* ctx = NULL;
+	GLNVGcontext* gl = (GLNVGcontext*)malloc(sizeof(GLNVGcontext));
+	if (gl == NULL) goto error;
+	memset(gl, 0, sizeof(GLNVGcontext));
+
+	memset(&params, 0, sizeof(params));
+	params.renderCreate = glnvg__renderCreate;
+	params.renderCreateTexture = glnvg__renderCreateTexture;
+	params.renderDeleteTexture = glnvg__renderDeleteTexture;
+	params.renderUpdateTexture = glnvg__renderUpdateTexture;
+	params.renderGetTextureSize = glnvg__renderGetTextureSize;
+	params.renderViewport = glnvg__renderViewport;
+	params.renderCancel = glnvg__renderCancel;
+	params.renderFlush = glnvg__renderFlush;
+	params.renderFill = glnvg__renderFill;
+	params.renderStroke = glnvg__renderStroke;
+	params.renderTriangles = glnvg__renderTriangles;
+	params.renderDelete = glnvg__renderDelete;
+	params.userPtr = gl;
+	params.edgeAntiAlias = flags & NVG_ANTIALIAS ? 1 : 0;
+
+	gl->flags = flags;
+
+	ctx = nvgCreateInternal(&params);
+	if (ctx == NULL) goto error;
+
+	return ctx;
+
+error:
+	// 'gl' is freed by nvgDeleteInternal.
+	if (ctx != NULL) nvgDeleteInternal(ctx);
+	return NULL;
+}
+
+#if defined NANOVG_GL2
+void nvgDeleteGL2(NVGcontext* ctx)
+#elif defined NANOVG_GL3
+void nvgDeleteGL3(NVGcontext* ctx)
+#elif defined NANOVG_GLES2
+void nvgDeleteGLES2(NVGcontext* ctx)
+#elif defined NANOVG_GLES3
+void nvgDeleteGLES3(NVGcontext* ctx)
+#endif
+{
+	nvgDeleteInternal(ctx);
+}
+
+#if defined NANOVG_GL2
+int nvglCreateImageFromHandleGL2(NVGcontext* ctx, unsigned int textureId, int w, int h, int imageFlags)
+#elif defined NANOVG_GL3
+int nvglCreateImageFromHandleGL3(NVGcontext* ctx, unsigned int textureId, int w, int h, int imageFlags)
+#elif defined NANOVG_GLES2
+int nvglCreateImageFromHandleGLES2(NVGcontext* ctx, unsigned int textureId, int w, int h, int imageFlags)
+#elif defined NANOVG_GLES3
+int nvglCreateImageFromHandleGLES3(NVGcontext* ctx, unsigned int textureId, int w, int h, int imageFlags)
+#endif
+{
+	GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr;
+	GLNVGtexture* tex = glnvg__allocTexture(gl);
+
+	if (tex == NULL) return 0;
+
+	tex->type = NVG_TEXTURE_RGBA;
+	tex->tex = textureId;
+	tex->flags = imageFlags;
+	tex->width = w;
+	tex->height = h;
+
+	return tex->id;
+}
+
+#if defined NANOVG_GL2
+unsigned int nvglImageHandleGL2(NVGcontext* ctx, int image)
+#elif defined NANOVG_GL3
+unsigned int nvglImageHandleGL3(NVGcontext* ctx, int image)
+#elif defined NANOVG_GLES2
+unsigned int nvglImageHandleGLES2(NVGcontext* ctx, int image)
+#elif defined NANOVG_GLES3
+unsigned int nvglImageHandleGLES3(NVGcontext* ctx, int image)
+#endif
+{
+	GLNVGcontext* gl = (GLNVGcontext*)nvgInternalParams(ctx)->userPtr;
+	GLNVGtexture* tex = glnvg__findTexture(gl, image);
+	return tex->tex;
+}
+
+#if defined NANOVG_GL2
+const NanoVG_GL_Functions_VTable NanoVG_GL2_Functions_VTable = {
+	.name = "GL2",
+	.createContext = &nvgCreateGL2,
+	.deleteContext = &nvgDeleteGL2,
+	.createImageFromHandle = &nvglCreateImageFromHandleGL2,
+	.getImageHandle = &nvglImageHandleGL2,
+};
+#elif defined NANOVG_GL3
+const NanoVG_GL_Functions_VTable NanoVG_GL3_Functions_VTable = {
+	.name = "GL3",
+	.createContext = &nvgCreateGL3,
+	.deleteContext = &nvgDeleteGL3,
+	.createImageFromHandle = &nvglCreateImageFromHandleGL3,
+	.getImageHandle = &nvglImageHandleGL3,
+};
+#elif defined NANOVG_GLES2
+const NanoVG_GL_Functions_VTable NanoVG_GLES2_Functions_VTable = {
+	.name = "GLES2",
+	.createContext = &nvgCreateGLES2,
+	.deleteContext = &nvgDeleteGLES2,
+	.createImageFromHandle = &nvglCreateImageFromHandleGLES2,
+	.getImageHandle = &nvglImageHandleGLES2,
+};
+#elif defined NANOVG_GLES3
+const NanoVG_GL_Functions_VTable NanoVG_GLES3_Functions_VTable = {
+	.name = "GLES2",
+	.createContext = &nvgCreateGLES3,
+	.deleteContext = &nvgDeleteGLES3,
+	.createImageFromHandle = &nvglCreateImageFromHandleGLES3,
+	.getImageHandle = &nvglImageHandleGLES3,
+};
+#endif
diff --git a/source/thirdparty/nanovg_gl.h b/source/thirdparty/nanovg_gl.h
new file mode 100644
index 0000000..9f90d8f
--- /dev/null
+++ b/source/thirdparty/nanovg_gl.h
@@ -0,0 +1,92 @@
+//
+// Copyright (c) 2009-2013 Mikko Mononen memon@inside.org
+//
+// This software is provided 'as-is', without any express or implied
+// warranty.  In no event will the authors be held liable for any damages
+// arising from the use of this software.
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would be
+//    appreciated but is not required.
+// 2. Altered source versions must be plainly marked as such, and must not be
+//    misrepresented as being the original software.
+// 3. This notice may not be removed or altered from any source distribution.
+//
+
+#ifndef NANOVG_GL_H_F380EF20_CDA3_11EA_AF55_D3B6DB88CFCC
+#define NANOVG_GL_H_F380EF20_CDA3_11EA_AF55_D3B6DB88CFCC
+
+#include "nanovg.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Create flags
+
+enum NVGcreateFlags {
+	// Flag indicating if geometry based anti-aliasing is used (may not be needed when using MSAA).
+	NVG_ANTIALIAS = 1<<0,
+	// Flag indicating if strokes should be drawn using stencil buffer. The rendering will be a little
+	// slower, but path overlaps (i.e. self-intersecting or sharp turns) will be drawn just once.
+	NVG_STENCIL_STROKES = 1<<1,
+	// Flag indicating that additional debug checks are done.
+	NVG_DEBUG = 1<<2,
+};
+
+// Define VTable with pointers to the functions for a each OpenGL (ES) version.
+
+typedef struct {
+	const char *name;
+	NVGcontext* (*createContext)(int flags);
+	void (*deleteContext) (NVGcontext* ctx);
+	int (*createImageFromHandle) (NVGcontext* ctx, unsigned int textureId, int w, int h, int flags);
+	unsigned int (*getImageHandle) (NVGcontext* ctx, int image);
+} NanoVG_GL_Functions_VTable;
+
+// Create NanoVG contexts for different OpenGL (ES) versions.
+
+NVGcontext* nvgCreateGL2(int flags);
+void nvgDeleteGL2(NVGcontext* ctx);
+
+int nvglCreateImageFromHandleGL2(NVGcontext* ctx, GLuint textureId, int w, int h, int flags);
+GLuint nvglImageHandleGL2(NVGcontext* ctx, int image);
+
+NVGcontext* nvgCreateGL3(int flags);
+void nvgDeleteGL3(NVGcontext* ctx);
+
+int nvglCreateImageFromHandleGL3(NVGcontext* ctx, GLuint textureId, int w, int h, int flags);
+GLuint nvglImageHandleGL3(NVGcontext* ctx, int image);
+
+NVGcontext* nvgCreateGLES2(int flags);
+void nvgDeleteGLES2(NVGcontext* ctx);
+
+int nvglCreateImageFromHandleGLES2(NVGcontext* ctx, GLuint textureId, int w, int h, int flags);
+GLuint nvglImageHandleGLES2(NVGcontext* ctx, int image);
+
+NVGcontext* nvgCreateGLES3(int flags);
+void nvgDeleteGLES3(NVGcontext* ctx);
+
+int nvglCreateImageFromHandleGLES3(NVGcontext* ctx, GLuint textureId, int w, int h, int flags);
+GLuint nvglImageHandleGLES3(NVGcontext* ctx, int image);
+
+// These are additional flags on top of NVGimageFlags.
+enum NVGimageFlagsGL {
+	NVG_IMAGE_NODELETE = 1<<16, // Do not delete GL texture handle.
+};
+
+// Create VTables for different OpenGL (ES) versions.
+
+extern const NanoVG_GL_Functions_VTable NanoVG_GL2_Functions_VTable;
+extern const NanoVG_GL_Functions_VTable NanoVG_GL3_Functions_VTable;
+extern const NanoVG_GL_Functions_VTable NanoVG_GLES2_Functions_VTable;
+extern const NanoVG_GL_Functions_VTable NanoVG_GLES3_Functions_VTable;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // NANOVG_GL_H_F380EF20_CDA3_11EA_AF55_D3B6DB88CFCC
diff --git a/source/thirdparty/sokol_app.h b/source/thirdparty/sokol_app.h
new file mode 100644
index 0000000..a1f45b6
--- /dev/null
+++ b/source/thirdparty/sokol_app.h
@@ -0,0 +1,11518 @@
+#if defined(SOKOL_IMPL) && !defined(SOKOL_APP_IMPL)
+#define SOKOL_APP_IMPL
+#endif
+#ifndef SOKOL_APP_INCLUDED
+/*
+    sokol_app.h -- cross-platform application wrapper
+
+    Project URL: https://github.com/floooh/sokol
+
+    Do this:
+        #define SOKOL_IMPL or
+        #define SOKOL_APP_IMPL
+    before you include this file in *one* C or C++ file to create the
+    implementation.
+
+    In the same place define one of the following to select the 3D-API
+    which should be initialized by sokol_app.h (this must also match
+    the backend selected for sokol_gfx.h if both are used in the same
+    project):
+
+        #define SOKOL_GLCORE33
+        #define SOKOL_GLES3
+        #define SOKOL_D3D11
+        #define SOKOL_METAL
+        #define SOKOL_WGPU
+
+    Optionally provide the following defines with your own implementations:
+
+        SOKOL_ASSERT(c)     - your own assert macro (default: assert(c))
+        SOKOL_UNREACHABLE() - a guard macro for unreachable code (default: assert(false))
+        SOKOL_WIN32_FORCE_MAIN  - define this on Win32 to use a main() entry point instead of WinMain
+        SOKOL_NO_ENTRY      - define this if sokol_app.h shouldn't "hijack" the main() function
+        SOKOL_APP_API_DECL  - public function declaration prefix (default: extern)
+        SOKOL_API_DECL      - same as SOKOL_APP_API_DECL
+        SOKOL_API_IMPL      - public function implementation prefix (default: -)
+
+    Optionally define the following to force debug checks and validations
+    even in release mode:
+
+        SOKOL_DEBUG         - by default this is defined if _DEBUG is defined
+
+    If sokol_app.h is compiled as a DLL, define the following before
+    including the declaration or implementation:
+
+        SOKOL_DLL
+
+    On Windows, SOKOL_DLL will define SOKOL_APP_API_DECL as __declspec(dllexport)
+    or __declspec(dllimport) as needed.
+
+    On Linux, SOKOL_GLCORE33 can use either GLX or EGL.
+    GLX is default, set SOKOL_FORCE_EGL to override.
+
+    For example code, see https://github.com/floooh/sokol-samples/tree/master/sapp
+
+    Portions of the Windows and Linux GL initialization, event-, icon- etc... code
+    have been taken from GLFW (http://www.glfw.org/)
+
+    iOS onscreen keyboard support 'inspired' by libgdx.
+
+    Link with the following system libraries:
+
+    - on macOS with Metal: Cocoa, QuartzCore, Metal, MetalKit
+    - on macOS with GL: Cocoa, QuartzCore, OpenGL
+    - on iOS with Metal: Foundation, UIKit, Metal, MetalKit
+    - on iOS with GL: Foundation, UIKit, OpenGLES, GLKit
+    - on Linux with EGL: X11, Xi, Xcursor, EGL, GL (or GLESv2), dl, pthread, m(?)
+    - on Linux with GLX: X11, Xi, Xcursor, GL, dl, pthread, m(?)
+    - on Android: GLESv3, EGL, log, android
+    - on Windows with the MSVC or Clang toolchains: no action needed, libs are defined in-source via pragma-comment-lib
+    - on Windows with MINGW/MSYS2 gcc: compile with '-mwin32' so that _WIN32 is defined
+        - link with the following libs: -lkernel32 -luser32 -lshell32
+        - additionally with the GL backend: -lgdi32
+        - additionally with the D3D11 backend: -ld3d11 -ldxgi
+
+    On Linux, you also need to use the -pthread compiler and linker option, otherwise weird
+    things will happen, see here for details: https://github.com/floooh/sokol/issues/376
+
+    On macOS and iOS, the implementation must be compiled as Objective-C.
+
+    FEATURE OVERVIEW
+    ================
+    sokol_app.h provides a minimalistic cross-platform API which
+    implements the 'application-wrapper' parts of a 3D application:
+
+    - a common application entry function
+    - creates a window and 3D-API context/device with a 'default framebuffer'
+    - makes the rendered frame visible
+    - provides keyboard-, mouse- and low-level touch-events
+    - platforms: MacOS, iOS, HTML5, Win32, Linux/RaspberryPi, Android
+    - 3D-APIs: Metal, D3D11, GL3.2, GLES3, WebGL, WebGL2
+
+    FEATURE/PLATFORM MATRIX
+    =======================
+                        | Windows | macOS | Linux |  iOS  | Android |  HTML5
+    --------------------+---------+-------+-------+-------+---------+--------
+    gl 3.x              | YES     | YES   | YES   | ---   | ---     |  ---
+    gles3/webgl2        | ---     | ---   | YES(2)| YES   | YES     |  YES
+    metal               | ---     | YES   | ---   | YES   | ---     |  ---
+    d3d11               | YES     | ---   | ---   | ---   | ---     |  ---
+    KEY_DOWN            | YES     | YES   | YES   | SOME  | TODO    |  YES
+    KEY_UP              | YES     | YES   | YES   | SOME  | TODO    |  YES
+    CHAR                | YES     | YES   | YES   | YES   | TODO    |  YES
+    MOUSE_DOWN          | YES     | YES   | YES   | ---   | ---     |  YES
+    MOUSE_UP            | YES     | YES   | YES   | ---   | ---     |  YES
+    MOUSE_SCROLL        | YES     | YES   | YES   | ---   | ---     |  YES
+    MOUSE_MOVE          | YES     | YES   | YES   | ---   | ---     |  YES
+    MOUSE_ENTER         | YES     | YES   | YES   | ---   | ---     |  YES
+    MOUSE_LEAVE         | YES     | YES   | YES   | ---   | ---     |  YES
+    TOUCHES_BEGAN       | ---     | ---   | ---   | YES   | YES     |  YES
+    TOUCHES_MOVED       | ---     | ---   | ---   | YES   | YES     |  YES
+    TOUCHES_ENDED       | ---     | ---   | ---   | YES   | YES     |  YES
+    TOUCHES_CANCELLED   | ---     | ---   | ---   | YES   | YES     |  YES
+    RESIZED             | YES     | YES   | YES   | YES   | YES     |  YES
+    ICONIFIED           | YES     | YES   | YES   | ---   | ---     |  ---
+    RESTORED            | YES     | YES   | YES   | ---   | ---     |  ---
+    FOCUSED             | YES     | YES   | YES   | ---   | ---     |  YES
+    UNFOCUSED           | YES     | YES   | YES   | ---   | ---     |  YES
+    SUSPENDED           | ---     | ---   | ---   | YES   | YES     |  TODO
+    RESUMED             | ---     | ---   | ---   | YES   | YES     |  TODO
+    QUIT_REQUESTED      | YES     | YES   | YES   | ---   | ---     |  YES
+    IME                 | TODO    | TODO? | TODO  | ???   | TODO    |  ???
+    key repeat flag     | YES     | YES   | YES   | ---   | ---     |  YES
+    windowed            | YES     | YES   | YES   | ---   | ---     |  YES
+    fullscreen          | YES     | YES   | YES   | YES   | YES     |  ---
+    mouse hide          | YES     | YES   | YES   | ---   | ---     |  YES
+    mouse lock          | YES     | YES   | YES   | ---   | ---     |  YES
+    set cursor type     | YES     | YES   | YES   | ---   | ---     |  YES
+    screen keyboard     | ---     | ---   | ---   | YES   | TODO    |  YES
+    swap interval       | YES     | YES   | YES   | YES   | TODO    |  YES
+    high-dpi            | YES     | YES   | TODO  | YES   | YES     |  YES
+    clipboard           | YES     | YES   | TODO  | ---   | ---     |  YES
+    MSAA                | YES     | YES   | YES   | YES   | YES     |  YES
+    drag'n'drop         | YES     | YES   | YES   | ---   | ---     |  YES
+    window icon         | YES     | YES(1)| YES   | ---   | ---     |  YES
+
+    (1) macOS has no regular window icons, instead the dock icon is changed
+    (2) supported with EGL only (not GLX)
+
+    STEP BY STEP
+    ============
+    --- Add a sokol_main() function to your code which returns a sapp_desc structure
+        with initialization parameters and callback function pointers. This
+        function is called very early, usually at the start of the
+        platform's entry function (e.g. main or WinMain). You should do as
+        little as possible here, since the rest of your code might be called
+        from another thread (this depends on the platform):
+
+            sapp_desc sokol_main(int argc, char* argv[]) {
+                return (sapp_desc) {
+                    .width = 640,
+                    .height = 480,
+                    .init_cb = my_init_func,
+                    .frame_cb = my_frame_func,
+                    .cleanup_cb = my_cleanup_func,
+                    .event_cb = my_event_func,
+                    ...
+                };
+            }
+
+        To get any logging output in case of errors you need to provide a log
+        callback. The easiest way is via sokol_log.h:
+
+            #include "sokol_log.h"
+
+            sapp_desc sokol_main(int argc, char* argv[]) {
+                return (sapp_desc) {
+                    ...
+                    .logger.func = slog_func,
+                };
+            }
+
+        There are many more setup parameters, but these are the most important.
+        For a complete list search for the sapp_desc structure declaration
+        below.
+
+        DO NOT call any sokol-app function from inside sokol_main(), since
+        sokol-app will not be initialized at this point.
+
+        The .width and .height parameters are the preferred size of the 3D
+        rendering canvas. The actual size may differ from this depending on
+        platform and other circumstances. Also the canvas size may change at
+        any time (for instance when the user resizes the application window,
+        or rotates the mobile device). You can just keep .width and .height
+        zero-initialized to open a default-sized window (what "default-size"
+        exactly means is platform-specific, but usually it's a size that covers
+        most of, but not all, of the display).
+
+        All provided function callbacks will be called from the same thread,
+        but this may be different from the thread where sokol_main() was called.
+
+        .init_cb (void (*)(void))
+            This function is called once after the application window,
+            3D rendering context and swap chain have been created. The
+            function takes no arguments and has no return value.
+        .frame_cb (void (*)(void))
+            This is the per-frame callback, which is usually called 60
+            times per second. This is where your application would update
+            most of its state and perform all rendering.
+        .cleanup_cb (void (*)(void))
+            The cleanup callback is called once right before the application
+            quits.
+        .event_cb (void (*)(const sapp_event* event))
+            The event callback is mainly for input handling, but is also
+            used to communicate other types of events to the application. Keep the
+            event_cb struct member zero-initialized if your application doesn't require
+            event handling.
+
+        As you can see, those 'standard callbacks' don't have a user_data
+        argument, so any data that needs to be preserved between callbacks
+        must live in global variables. If keeping state in global variables
+        is not an option, there's an alternative set of callbacks with
+        an additional user_data pointer argument:
+
+        .user_data (void*)
+            The user-data argument for the callbacks below
+        .init_userdata_cb (void (*)(void* user_data))
+        .frame_userdata_cb (void (*)(void* user_data))
+        .cleanup_userdata_cb (void (*)(void* user_data))
+        .event_userdata_cb (void(*)(const sapp_event* event, void* user_data))
+
+        The function sapp_userdata() can be used to query the user_data
+        pointer provided in the sapp_desc struct.
+
+        You can also call sapp_query_desc() to get a copy of the
+        original sapp_desc structure.
+
+        NOTE that there's also an alternative compile mode where sokol_app.h
+        doesn't "hijack" the main() function. Search below for SOKOL_NO_ENTRY.
+
+    --- Implement the initialization callback function (init_cb), this is called
+        once after the rendering surface, 3D API and swap chain have been
+        initialized by sokol_app. All sokol-app functions can be called
+        from inside the initialization callback, the most useful functions
+        at this point are:
+
+        int sapp_width(void)
+        int sapp_height(void)
+            Returns the current width and height of the default framebuffer in pixels,
+            this may change from one frame to the next, and it may be different
+            from the initial size provided in the sapp_desc struct.
+
+        float sapp_widthf(void)
+        float sapp_heightf(void)
+            These are alternatives to sapp_width() and sapp_height() which return
+            the default framebuffer size as float values instead of integer. This
+            may help to prevent casting back and forth between int and float
+            in more strongly typed languages than C and C++.
+
+        double sapp_frame_duration(void)
+            Returns the frame duration in seconds averaged over a number of
+            frames to smooth out any jittering spikes.
+
+        int sapp_color_format(void)
+        int sapp_depth_format(void)
+            The color and depth-stencil pixelformats of the default framebuffer,
+            as integer values which are compatible with sokol-gfx's
+            sg_pixel_format enum (so that they can be plugged directly in places
+            where sg_pixel_format is expected). Possible values are:
+
+                23 == SG_PIXELFORMAT_RGBA8
+                28 == SG_PIXELFORMAT_BGRA8
+                42 == SG_PIXELFORMAT_DEPTH
+                43 == SG_PIXELFORMAT_DEPTH_STENCIL
+
+        int sapp_sample_count(void)
+            Return the MSAA sample count of the default framebuffer.
+
+        const void* sapp_metal_get_device(void)
+        const void* sapp_metal_get_renderpass_descriptor(void)
+        const void* sapp_metal_get_drawable(void)
+            If the Metal backend has been selected, these functions return pointers
+            to various Metal API objects required for rendering, otherwise
+            they return a null pointer. These void pointers are actually
+            Objective-C ids converted with a (ARC) __bridge cast so that
+            the ids can be tunnel through C code. Also note that the returned
+            pointers to the renderpass-descriptor and drawable may change from one
+            frame to the next, only the Metal device object is guaranteed to
+            stay the same.
+
+        const void* sapp_macos_get_window(void)
+            On macOS, get the NSWindow object pointer, otherwise a null pointer.
+            Before being used as Objective-C object, the void* must be converted
+            back with a (ARC) __bridge cast.
+
+        const void* sapp_ios_get_window(void)
+            On iOS, get the UIWindow object pointer, otherwise a null pointer.
+            Before being used as Objective-C object, the void* must be converted
+            back with a (ARC) __bridge cast.
+
+        const void* sapp_win32_get_hwnd(void)
+            On Windows, get the window's HWND, otherwise a null pointer. The
+            HWND has been cast to a void pointer in order to be tunneled
+            through code which doesn't include Windows.h.
+
+        const void* sapp_d3d11_get_device(void)
+        const void* sapp_d3d11_get_device_context(void)
+        const void* sapp_d3d11_get_render_target_view(void)
+        const void* sapp_d3d11_get_depth_stencil_view(void)
+            Similar to the sapp_metal_* functions, the sapp_d3d11_* functions
+            return pointers to D3D11 API objects required for rendering,
+            only if the D3D11 backend has been selected. Otherwise they
+            return a null pointer. Note that the returned pointers to the
+            render-target-view and depth-stencil-view may change from one
+            frame to the next!
+
+        const void* sapp_wgpu_get_device(void)
+        const void* sapp_wgpu_get_render_view(void)
+        const void* sapp_wgpu_get_resolve_view(void)
+        const void* sapp_wgpu_get_depth_stencil_view(void)
+            These are the WebGPU-specific functions to get the WebGPU
+            objects and values required for rendering. If sokol_app.h
+            is not compiled with SOKOL_WGPU, these functions return null.
+
+        const void* sapp_android_get_native_activity(void);
+            On Android, get the native activity ANativeActivity pointer, otherwise
+            a null pointer.
+
+    --- Implement the frame-callback function, this function will be called
+        on the same thread as the init callback, but might be on a different
+        thread than the sokol_main() function. Note that the size of
+        the rendering framebuffer might have changed since the frame callback
+        was called last. Call the functions sapp_width() and sapp_height()
+        each frame to get the current size.
+
+    --- Optionally implement the event-callback to handle input events.
+        sokol-app provides the following type of input events:
+            - a 'virtual key' was pressed down or released
+            - a single text character was entered (provided as UTF-32 code point)
+            - a mouse button was pressed down or released (left, right, middle)
+            - mouse-wheel or 2D scrolling events
+            - the mouse was moved
+            - the mouse has entered or left the application window boundaries
+            - low-level, portable multi-touch events (began, moved, ended, cancelled)
+            - the application window was resized, iconified or restored
+            - the application was suspended or restored (on mobile platforms)
+            - the user or application code has asked to quit the application
+            - a string was pasted to the system clipboard
+            - one or more files have been dropped onto the application window
+
+        To explicitly 'consume' an event and prevent that the event is
+        forwarded for further handling to the operating system, call
+        sapp_consume_event() from inside the event handler (NOTE that
+        this behaviour is currently only implemented for some HTML5
+        events, support for other platforms and event types will
+        be added as needed, please open a github ticket and/or provide
+        a PR if needed).
+
+        NOTE: Do *not* call any 3D API rendering functions in the event
+        callback function, since the 3D API context may not be active when the
+        event callback is called (it may work on some platforms and 3D APIs,
+        but not others, and the exact behaviour may change between
+        sokol-app versions).
+
+    --- Implement the cleanup-callback function, this is called once
+        after the user quits the application (see the section
+        "APPLICATION QUIT" for detailed information on quitting
+        behaviour, and how to intercept a pending quit - for instance to show a
+        "Really Quit?" dialog box). Note that the cleanup-callback isn't
+        guaranteed to be called on the web and mobile platforms.
+
+    MOUSE CURSOR TYPE AND VISIBILITY
+    ================================
+    You can show and hide the mouse cursor with
+
+        void sapp_show_mouse(bool show)
+
+    And to get the current shown status:
+
+        bool sapp_mouse_shown(void)
+
+    NOTE that hiding the mouse cursor is different and independent from
+    the MOUSE/POINTER LOCK feature which will also hide the mouse pointer when
+    active (MOUSE LOCK is described below).
+
+    To change the mouse cursor to one of several predefined types, call
+    the function:
+
+        void sapp_set_mouse_cursor(sapp_mouse_cursor cursor)
+
+    Setting the default mouse cursor SAPP_MOUSECURSOR_DEFAULT will restore
+    the standard look.
+
+    To get the currently active mouse cursor type, call:
+
+        sapp_mouse_cursor sapp_get_mouse_cursor(void)
+
+    MOUSE LOCK (AKA POINTER LOCK, AKA MOUSE CAPTURE)
+    ================================================
+    In normal mouse mode, no mouse movement events are reported when the
+    mouse leaves the windows client area or hits the screen border (whether
+    it's one or the other depends on the platform), and the mouse move events
+    (SAPP_EVENTTYPE_MOUSE_MOVE) contain absolute mouse positions in
+    framebuffer pixels in the sapp_event items mouse_x and mouse_y, and
+    relative movement in framebuffer pixels in the sapp_event items mouse_dx
+    and mouse_dy.
+
+    To get continuous mouse movement (also when the mouse leaves the window
+    client area or hits the screen border), activate mouse-lock mode
+    by calling:
+
+        sapp_lock_mouse(true)
+
+    When mouse lock is activated, the mouse pointer is hidden, the
+    reported absolute mouse position (sapp_event.mouse_x/y) appears
+    frozen, and the relative mouse movement in sapp_event.mouse_dx/dy
+    no longer has a direct relation to framebuffer pixels but instead
+    uses "raw mouse input" (what "raw mouse input" exactly means also
+    differs by platform).
+
+    To deactivate mouse lock and return to normal mouse mode, call
+
+        sapp_lock_mouse(false)
+
+    And finally, to check if mouse lock is currently active, call
+
+        if (sapp_mouse_locked()) { ... }
+
+    On native platforms, the sapp_lock_mouse() and sapp_mouse_locked()
+    functions work as expected (mouse lock is activated or deactivated
+    immediately when sapp_lock_mouse() is called, and sapp_mouse_locked()
+    also immediately returns the new state after sapp_lock_mouse()
+    is called.
+
+    On the web platform, sapp_lock_mouse() and sapp_mouse_locked() behave
+    differently, as dictated by the limitations of the HTML5 Pointer Lock API:
+
+        - sapp_lock_mouse(true) can be called at any time, but it will
+          only take effect in a 'short-lived input event handler of a specific
+          type', meaning when one of the following events happens:
+            - SAPP_EVENTTYPE_MOUSE_DOWN
+            - SAPP_EVENTTYPE_MOUSE_UP
+            - SAPP_EVENTTYPE_MOUSE_SCROLL
+            - SAPP_EVENTTYPE_KEY_UP
+            - SAPP_EVENTTYPE_KEY_DOWN
+        - The mouse lock/unlock action on the web platform is asynchronous,
+          this means that sapp_mouse_locked() won't immediately return
+          the new status after calling sapp_lock_mouse(), instead the
+          reported status will only change when the pointer lock has actually
+          been activated or deactivated in the browser.
+        - On the web, mouse lock can be deactivated by the user at any time
+          by pressing the Esc key. When this happens, sokol_app.h behaves
+          the same as if sapp_lock_mouse(false) is called.
+
+    For things like camera manipulation it's most straightforward to lock
+    and unlock the mouse right from the sokol_app.h event handler, for
+    instance the following code enters and leaves mouse lock when the
+    left mouse button is pressed and released, and then uses the relative
+    movement information to manipulate a camera (taken from the
+    cgltf-sapp.c sample in the sokol-samples repository
+    at https://github.com/floooh/sokol-samples):
+
+        static void input(const sapp_event* ev) {
+            switch (ev->type) {
+                case SAPP_EVENTTYPE_MOUSE_DOWN:
+                    if (ev->mouse_button == SAPP_MOUSEBUTTON_LEFT) {
+                        sapp_lock_mouse(true);
+                    }
+                    break;
+
+                case SAPP_EVENTTYPE_MOUSE_UP:
+                    if (ev->mouse_button == SAPP_MOUSEBUTTON_LEFT) {
+                        sapp_lock_mouse(false);
+                    }
+                    break;
+
+                case SAPP_EVENTTYPE_MOUSE_MOVE:
+                    if (sapp_mouse_locked()) {
+                        cam_orbit(&state.camera, ev->mouse_dx * 0.25f, ev->mouse_dy * 0.25f);
+                    }
+                    break;
+
+                default:
+                    break;
+            }
+        }
+
+    CLIPBOARD SUPPORT
+    =================
+    Applications can send and receive UTF-8 encoded text data from and to the
+    system clipboard. By default, clipboard support is disabled and
+    must be enabled at startup via the following sapp_desc struct
+    members:
+
+        sapp_desc.enable_clipboard  - set to true to enable clipboard support
+        sapp_desc.clipboard_size    - size of the internal clipboard buffer in bytes
+
+    Enabling the clipboard will dynamically allocate a clipboard buffer
+    for UTF-8 encoded text data of the requested size in bytes, the default
+    size is 8 KBytes. Strings that don't fit into the clipboard buffer
+    (including the terminating zero) will be silently clipped, so it's
+    important that you provide a big enough clipboard size for your
+    use case.
+
+    To send data to the clipboard, call sapp_set_clipboard_string() with
+    a pointer to an UTF-8 encoded, null-terminated C-string.
+
+    NOTE that on the HTML5 platform, sapp_set_clipboard_string() must be
+    called from inside a 'short-lived event handler', and there are a few
+    other HTML5-specific caveats to workaround. You'll basically have to
+    tinker until it works in all browsers :/ (maybe the situation will
+    improve when all browsers agree on and implement the new
+    HTML5 navigator.clipboard API).
+
+    To get data from the clipboard, check for the SAPP_EVENTTYPE_CLIPBOARD_PASTED
+    event in your event handler function, and then call sapp_get_clipboard_string()
+    to obtain the pasted UTF-8 encoded text.
+
+    NOTE that behaviour of sapp_get_clipboard_string() is slightly different
+    depending on platform:
+
+        - on the HTML5 platform, the internal clipboard buffer will only be updated
+          right before the SAPP_EVENTTYPE_CLIPBOARD_PASTED event is sent,
+          and sapp_get_clipboard_string() will simply return the current content
+          of the clipboard buffer
+        - on 'native' platforms, the call to sapp_get_clipboard_string() will
+          update the internal clipboard buffer with the most recent data
+          from the system clipboard
+
+    Portable code should check for the SAPP_EVENTTYPE_CLIPBOARD_PASTED event,
+    and then call sapp_get_clipboard_string() right in the event handler.
+
+    The SAPP_EVENTTYPE_CLIPBOARD_PASTED event will be generated by sokol-app
+    as follows:
+
+        - on macOS: when the Cmd+V key is pressed down
+        - on HTML5: when the browser sends a 'paste' event to the global 'window' object
+        - on all other platforms: when the Ctrl+V key is pressed down
+
+    DRAG AND DROP SUPPORT
+    =====================
+    PLEASE NOTE: the drag'n'drop feature works differently on WASM/HTML5
+    and on the native desktop platforms (Win32, Linux and macOS) because
+    of security-related restrictions in the HTML5 drag'n'drop API. The
+    WASM/HTML5 specifics are described at the end of this documentation
+    section:
+
+    Like clipboard support, drag'n'drop support must be explicitly enabled
+    at startup in the sapp_desc struct.
+
+        sapp_desc sokol_main() {
+            return (sapp_desc) {
+                .enable_dragndrop = true,   // default is false
+                ...
+            };
+        }
+
+    You can also adjust the maximum number of files that are accepted
+    in a drop operation, and the maximum path length in bytes if needed:
+
+        sapp_desc sokol_main() {
+            return (sapp_desc) {
+                .enable_dragndrop = true,               // default is false
+                .max_dropped_files = 8,                 // default is 1
+                .max_dropped_file_path_length = 8192,   // in bytes, default is 2048
+                ...
+            };
+        }
+
+    When drag'n'drop is enabled, the event callback will be invoked with an
+    event of type SAPP_EVENTTYPE_FILES_DROPPED whenever the user drops files on
+    the application window.
+
+    After the SAPP_EVENTTYPE_FILES_DROPPED is received, you can query the
+    number of dropped files, and their absolute paths by calling separate
+    functions:
+
+        void on_event(const sapp_event* ev) {
+            if (ev->type == SAPP_EVENTTYPE_FILES_DROPPED) {
+
+                // the mouse position where the drop happened
+                float x = ev->mouse_x;
+                float y = ev->mouse_y;
+
+                // get the number of files and their paths like this:
+                const int num_dropped_files = sapp_get_num_dropped_files();
+                for (int i = 0; i < num_dropped_files; i++) {
+                    const char* path = sapp_get_dropped_file_path(i);
+                    ...
+                }
+            }
+        }
+
+    The returned file paths are UTF-8 encoded strings.
+
+    You can call sapp_get_num_dropped_files() and sapp_get_dropped_file_path()
+    anywhere, also outside the event handler callback, but be aware that the
+    file path strings will be overwritten with the next drop operation.
+
+    In any case, sapp_get_dropped_file_path() will never return a null pointer,
+    instead an empty string "" will be returned if the drag'n'drop feature
+    hasn't been enabled, the last drop-operation failed, or the file path index
+    is out of range.
+
+    Drag'n'drop caveats:
+
+        - if more files are dropped in a single drop-action
+          than sapp_desc.max_dropped_files, the additional
+          files will be silently ignored
+        - if any of the file paths is longer than
+          sapp_desc.max_dropped_file_path_length (in number of bytes, after UTF-8
+          encoding) the entire drop operation will be silently ignored (this
+          needs some sort of error feedback in the future)
+        - no mouse positions are reported while the drag is in
+          process, this may change in the future
+
+    Drag'n'drop on HTML5/WASM:
+
+    The HTML5 drag'n'drop API doesn't return file paths, but instead
+    black-box 'file objects' which must be used to load the content
+    of dropped files. This is the reason why sokol_app.h adds two
+    HTML5-specific functions to the drag'n'drop API:
+
+        uint32_t sapp_html5_get_dropped_file_size(int index)
+            Returns the size in bytes of a dropped file.
+
+        void sapp_html5_fetch_dropped_file(const sapp_html5_fetch_request* request)
+            Asynchronously loads the content of a dropped file into a
+            provided memory buffer (which must be big enough to hold
+            the file content)
+
+    To start loading the first dropped file after an SAPP_EVENTTYPE_FILES_DROPPED
+    event is received:
+
+        sapp_html5_fetch_dropped_file(&(sapp_html5_fetch_request){
+            .dropped_file_index = 0,
+            .callback = fetch_cb
+            .buffer = {
+                .ptr = buf,
+                .size = sizeof(buf)
+            },
+            .user_data = ...
+        });
+
+    Make sure that the memory pointed to by 'buf' stays valid until the
+    callback function is called!
+
+    As result of the asynchronous loading operation (no matter if succeeded or
+    failed) the 'fetch_cb' function will be called:
+
+        void fetch_cb(const sapp_html5_fetch_response* response) {
+            // IMPORTANT: check if the loading operation actually succeeded:
+            if (response->succeeded) {
+                // the size of the loaded file:
+                const size_t num_bytes = response->data.size;
+                // and the pointer to the data (same as 'buf' in the fetch-call):
+                const void* ptr = response->data.ptr;
+            }
+            else {
+                // on error check the error code:
+                switch (response->error_code) {
+                    case SAPP_HTML5_FETCH_ERROR_BUFFER_TOO_SMALL:
+                        ...
+                        break;
+                    case SAPP_HTML5_FETCH_ERROR_OTHER:
+                        ...
+                        break;
+                }
+            }
+        }
+
+    Check the droptest-sapp example for a real-world example which works
+    both on native platforms and the web:
+
+    https://github.com/floooh/sokol-samples/blob/master/sapp/droptest-sapp.c
+
+    HIGH-DPI RENDERING
+    ==================
+    You can set the sapp_desc.high_dpi flag during initialization to request
+    a full-resolution framebuffer on HighDPI displays. The default behaviour
+    is sapp_desc.high_dpi=false, this means that the application will
+    render to a lower-resolution framebuffer on HighDPI displays and the
+    rendered content will be upscaled by the window system composer.
+
+    In a HighDPI scenario, you still request the same window size during
+    sokol_main(), but the framebuffer sizes returned by sapp_width()
+    and sapp_height() will be scaled up according to the DPI scaling
+    ratio.
+
+    Note that on some platforms the DPI scaling factor may change at any
+    time (for instance when a window is moved from a high-dpi display
+    to a low-dpi display).
+
+    To query the current DPI scaling factor, call the function:
+
+    float sapp_dpi_scale(void);
+
+    For instance on a Retina Mac, returning the following sapp_desc
+    struct from sokol_main():
+
+    sapp_desc sokol_main() {
+        return (sapp_desc) {
+            .width = 640,
+            .height = 480,
+            .high_dpi = true,
+            ...
+        };
+    }
+
+    ...the functions the functions sapp_width(), sapp_height()
+    and sapp_dpi_scale() will return the following values:
+
+    sapp_width:     1280
+    sapp_height:    960
+    sapp_dpi_scale: 2.0
+
+    If the high_dpi flag is false, or you're not running on a Retina display,
+    the values would be:
+
+    sapp_width:     640
+    sapp_height:    480
+    sapp_dpi_scale: 1.0
+
+    If the window is moved from the Retina display to a low-dpi external display,
+    the values would change as follows:
+
+    sapp_width:     1280 => 640
+    sapp_height:    960  => 480
+    sapp_dpi_scale: 2.0  => 1.0
+
+    Currently there is no event associated with a DPI change, but an
+    SAPP_EVENTTYPE_RESIZED will be sent as a side effect of the
+    framebuffer size changing.
+
+    Per-monitor DPI is currently supported on macOS and Windows.
+
+    APPLICATION QUIT
+    ================
+    Without special quit handling, a sokol_app.h application will quit
+    'gracefully' when the user clicks the window close-button unless a
+    platform's application model prevents this (e.g. on web or mobile).
+    'Graceful exit' means that the application-provided cleanup callback will
+    be called before the application quits.
+
+    On native desktop platforms sokol_app.h provides more control over the
+    application-quit-process. It's possible to initiate a 'programmatic quit'
+    from the application code, and a quit initiated by the application user can
+    be intercepted (for instance to show a custom dialog box).
+
+    This 'programmatic quit protocol' is implemented through 3 functions
+    and 1 event:
+
+        - sapp_quit(): This function simply quits the application without
+          giving the user a chance to intervene. Usually this might
+          be called when the user clicks the 'Ok' button in a 'Really Quit?'
+          dialog box
+        - sapp_request_quit(): Calling sapp_request_quit() will send the
+          event SAPP_EVENTTYPE_QUIT_REQUESTED to the applications event handler
+          callback, giving the user code a chance to intervene and cancel the
+          pending quit process (for instance to show a 'Really Quit?' dialog
+          box). If the event handler callback does nothing, the application
+          will be quit as usual. To prevent this, call the function
+          sapp_cancel_quit() from inside the event handler.
+        - sapp_cancel_quit(): Cancels a pending quit request, either initiated
+          by the user clicking the window close button, or programmatically
+          by calling sapp_request_quit(). The only place where calling this
+          function makes sense is from inside the event handler callback when
+          the SAPP_EVENTTYPE_QUIT_REQUESTED event has been received.
+        - SAPP_EVENTTYPE_QUIT_REQUESTED: this event is sent when the user
+          clicks the window's close button or application code calls the
+          sapp_request_quit() function. The event handler callback code can handle
+          this event by calling sapp_cancel_quit() to cancel the quit.
+          If the event is ignored, the application will quit as usual.
+
+    On the web platform, the quit behaviour differs from native platforms,
+    because of web-specific restrictions:
+
+    A `programmatic quit` initiated by calling sapp_quit() or
+    sapp_request_quit() will work as described above: the cleanup callback is
+    called, platform-specific cleanup is performed (on the web
+    this means that JS event handlers are unregisters), and then
+    the request-animation-loop will be exited. However that's all. The
+    web page itself will continue to exist (e.g. it's not possible to
+    programmatically close the browser tab).
+
+    On the web it's also not possible to run custom code when the user
+    closes a browser tab, so it's not possible to prevent this with a
+    fancy custom dialog box.
+
+    Instead the standard "Leave Site?" dialog box can be activated (or
+    deactivated) with the following function:
+
+        sapp_html5_ask_leave_site(bool ask);
+
+    The initial state of the associated internal flag can be provided
+    at startup via sapp_desc.html5_ask_leave_site.
+
+    This feature should only be used sparingly in critical situations - for
+    instance when the user would loose data - since popping up modal dialog
+    boxes is considered quite rude in the web world. Note that there's no way
+    to customize the content of this dialog box or run any code as a result
+    of the user's decision. Also note that the user must have interacted with
+    the site before the dialog box will appear. These are all security measures
+    to prevent fishing.
+
+    The Dear ImGui HighDPI sample contains example code of how to
+    implement a 'Really Quit?' dialog box with Dear ImGui (native desktop
+    platforms only), and for showing the hardwired "Leave Site?" dialog box
+    when running on the web platform:
+
+        https://floooh.github.io/sokol-html5/wasm/imgui-highdpi-sapp.html
+
+    FULLSCREEN
+    ==========
+    If the sapp_desc.fullscreen flag is true, sokol-app will try to create
+    a fullscreen window on platforms with a 'proper' window system
+    (mobile devices will always use fullscreen). The implementation details
+    depend on the target platform, in general sokol-app will use a
+    'soft approach' which doesn't interfere too much with the platform's
+    window system (for instance borderless fullscreen window instead of
+    a 'real' fullscreen mode). Such details might change over time
+    as sokol-app is adapted for different needs.
+
+    The most important effect of fullscreen mode to keep in mind is that
+    the requested canvas width and height will be ignored for the initial
+    window size, calling sapp_width() and sapp_height() will instead return
+    the resolution of the fullscreen canvas (however the provided size
+    might still be used for the non-fullscreen window, in case the user can
+    switch back from fullscreen- to windowed-mode).
+
+    To toggle fullscreen mode programmatically, call sapp_toggle_fullscreen().
+
+    To check if the application window is currently in fullscreen mode,
+    call sapp_is_fullscreen().
+
+    WINDOW ICON SUPPORT
+    ===================
+    Some sokol_app.h backends allow to change the window icon programmatically:
+
+        - on Win32: the small icon in the window's title bar, and the
+          bigger icon in the task bar
+        - on Linux: highly dependent on the used window manager, but usually
+          the window's title bar icon and/or the task bar icon
+        - on HTML5: the favicon shown in the page's browser tab
+
+    NOTE that it is not possible to set the actual application icon which is
+    displayed by the operating system on the desktop or 'home screen'. Those
+    icons must be provided 'traditionally' through operating-system-specific
+    resources which are associated with the application (sokol_app.h might
+    later support setting the window icon from platform specific resource data
+    though).
+
+    There are two ways to set the window icon:
+
+        - at application start in the sokol_main() function by initializing
+          the sapp_desc.icon nested struct
+        - or later by calling the function sapp_set_icon()
+
+    As a convenient shortcut, sokol_app.h comes with a builtin default-icon
+    (a rainbow-colored 'S', which at least looks a bit better than the Windows
+    default icon for applications), which can be activated like this:
+
+    At startup in sokol_main():
+
+        sapp_desc sokol_main(...) {
+            return (sapp_desc){
+                ...
+                icon.sokol_default = true
+            };
+        }
+
+    Or later by calling:
+
+        sapp_set_icon(&(sapp_icon_desc){ .sokol_default = true });
+
+    NOTE that a completely zero-initialized sapp_icon_desc struct will not
+    update the window icon in any way. This is an 'escape hatch' so that you
+    can handle the window icon update yourself (or if you do this already,
+    sokol_app.h won't get in your way, in this case just leave the
+    sapp_desc.icon struct zero-initialized).
+
+    Providing your own icon images works exactly like in GLFW (down to the
+    data format):
+
+    You provide one or more 'candidate images' in different sizes, and the
+    sokol_app.h platform backends pick the best match for the specific backend
+    and icon type.
+
+    For each candidate image, you need to provide:
+
+        - the width in pixels
+        - the height in pixels
+        - and the actual pixel data in RGBA8 pixel format (e.g. 0xFFCC8844
+          on a little-endian CPU means: alpha=0xFF, blue=0xCC, green=0x88, red=0x44)
+
+    For instance, if you have 3 candidate images (small, medium, big) of
+    sizes 16x16, 32x32 and 64x64 the corresponding sapp_icon_desc struct is setup
+    like this:
+
+        // the actual pixel data (RGBA8, origin top-left)
+        const uint32_t small[16][16]  = { ... };
+        const uint32_t medium[32][32] = { ... };
+        const uint32_t big[64][64]    = { ... };
+
+        const sapp_icon_desc icon_desc = {
+            .images = {
+                { .width = 16, .height = 16, .pixels = SAPP_RANGE(small) },
+                { .width = 32, .height = 32, .pixels = SAPP_RANGE(medium) },
+                // ...or without the SAPP_RANGE helper macro:
+                { .width = 64, .height = 64, .pixels = { .ptr=big, .size=sizeof(big) } }
+            }
+        };
+
+    An sapp_icon_desc struct initialized like this can then either be applied
+    at application start in sokol_main:
+
+        sapp_desc sokol_main(...) {
+            return (sapp_desc){
+                ...
+                icon = icon_desc
+            };
+        }
+
+    ...or later by calling sapp_set_icon():
+
+        sapp_set_icon(&icon_desc);
+
+    Some window icon caveats:
+
+        - once the window icon has been updated, there's no way to go back to
+          the platform's default icon, this is because some platforms (Linux
+          and HTML5) don't switch the icon visual back to the default even if
+          the custom icon is deleted or removed
+        - on HTML5, if the sokol_app.h icon doesn't show up in the browser
+          tab, check that there's no traditional favicon 'link' element
+          is defined in the page's index.html, sokol_app.h will only
+          append a new favicon link element, but not delete any manually
+          defined favicon in the page
+
+    For an example and test of the window icon feature, check out the the
+    'icon-sapp' sample on the sokol-samples git repository.
+
+    ONSCREEN KEYBOARD
+    =================
+    On some platforms which don't provide a physical keyboard, sokol-app
+    can display the platform's integrated onscreen keyboard for text
+    input. To request that the onscreen keyboard is shown, call
+
+        sapp_show_keyboard(true);
+
+    Likewise, to hide the keyboard call:
+
+        sapp_show_keyboard(false);
+
+    Note that on the web platform, the keyboard can only be shown from
+    inside an input handler. On such platforms, sapp_show_keyboard()
+    will only work as expected when it is called from inside the
+    sokol-app event callback function. When called from other places,
+    an internal flag will be set, and the onscreen keyboard will be
+    called at the next 'legal' opportunity (when the next input event
+    is handled).
+
+    OPTIONAL: DON'T HIJACK main() (#define SOKOL_NO_ENTRY)
+    ======================================================
+    In its default configuration, sokol_app.h "hijacks" the platform's
+    standard main() function. This was done because different platforms
+    have different main functions which are not compatible with
+    C's main() (for instance WinMain on Windows has completely different
+    arguments). However, this "main hijacking" posed a problem for
+    usage scenarios like integrating sokol_app.h with other languages than
+    C or C++, so an alternative SOKOL_NO_ENTRY mode has been added
+    in which the user code provides the platform's main function:
+
+    - define SOKOL_NO_ENTRY before including the sokol_app.h implementation
+    - do *not* provide a sokol_main() function
+    - instead provide the standard main() function of the platform
+    - from the main function, call the function ```sapp_run()``` which
+      takes a pointer to an ```sapp_desc``` structure.
+    - ```sapp_run()``` takes over control and calls the provided init-, frame-,
+      shutdown- and event-callbacks just like in the default model, it
+      will only return when the application quits (or not at all on some
+      platforms, like emscripten)
+
+    NOTE: SOKOL_NO_ENTRY is currently not supported on Android.
+
+    WINDOWS CONSOLE OUTPUT
+    ======================
+    On Windows, regular windowed applications don't show any stdout/stderr text
+    output, which can be a bit of a hassle for printf() debugging or generally
+    logging text to the console. Also, console output by default uses a local
+    codepage setting and thus international UTF-8 encoded text is printed
+    as garbage.
+
+    To help with these issues, sokol_app.h can be configured at startup
+    via the following Windows-specific sapp_desc flags:
+
+        sapp_desc.win32_console_utf8 (default: false)
+            When set to true, the output console codepage will be switched
+            to UTF-8 (and restored to the original codepage on exit)
+
+        sapp_desc.win32_console_attach (default: false)
+            When set to true, stdout and stderr will be attached to the
+            console of the parent process (if the parent process actually
+            has a console). This means that if the application was started
+            in a command line window, stdout and stderr output will be printed
+            to the terminal, just like a regular command line program. But if
+            the application is started via double-click, it will behave like
+            a regular UI application, and stdout/stderr will not be visible.
+
+        sapp_desc.win32_console_create (default: false)
+            When set to true, a new console window will be created and
+            stdout/stderr will be redirected to that console window. It
+            doesn't matter if the application is started from the command
+            line or via double-click.
+
+    MEMORY ALLOCATION OVERRIDE
+    ==========================
+    You can override the memory allocation functions at initialization time
+    like this:
+
+        void* my_alloc(size_t size, void* user_data) {
+            return malloc(size);
+        }
+
+        void my_free(void* ptr, void* user_data) {
+            free(ptr);
+        }
+
+        sapp_desc sokol_main(int argc, char* argv[]) {
+            return (sapp_desc){
+                // ...
+                .allocator = {
+                    .alloc = my_alloc,
+                    .free = my_free,
+                    .user_data = ...,
+                }
+            };
+        }
+
+    If no overrides are provided, malloc and free will be used.
+
+    This only affects memory allocation calls done by sokol_app.h
+    itself though, not any allocations in OS libraries.
+
+
+    ERROR REPORTING AND LOGGING
+    ===========================
+    To get any logging information at all you need to provide a logging callback in the setup call
+    the easiest way is to use sokol_log.h:
+
+        #include "sokol_log.h"
+
+        sapp_desc sokol_main(int argc, char* argv[]) {
+            return (sapp_desc) {
+                ...
+                .logger.func = slog_func,
+            };
+        }
+
+    To override logging with your own callback, first write a logging function like this:
+
+        void my_log(const char* tag,                // e.g. 'sapp'
+                    uint32_t log_level,             // 0=panic, 1=error, 2=warn, 3=info
+                    uint32_t log_item_id,           // SAPP_LOGITEM_*
+                    const char* message_or_null,    // a message string, may be nullptr in release mode
+                    uint32_t line_nr,               // line number in sokol_app.h
+                    const char* filename_or_null,   // source filename, may be nullptr in release mode
+                    void* user_data)
+        {
+            ...
+        }
+
+    ...and then setup sokol-app like this:
+
+        sapp_desc sokol_main(int argc, char* argv[]) {
+            return (sapp_desc) {
+                ...
+                .logger = {
+                    .func = my_log,
+                    .user_data = my_user_data,
+                }
+            };
+        }
+
+    The provided logging function must be reentrant (e.g. be callable from
+    different threads).
+
+    If you don't want to provide your own custom logger it is highly recommended to use
+    the standard logger in sokol_log.h instead, otherwise you won't see any warnings or
+    errors.
+
+
+    TEMP NOTE DUMP
+    ==============
+    - onscreen keyboard support on Android requires Java :(, should we even bother?
+    - sapp_desc needs a bool whether to initialize depth-stencil surface
+    - GL context initialization needs more control (at least what GL version to initialize)
+    - application icon
+    - the Android implementation calls cleanup_cb() and destroys the egl context in onDestroy
+      at the latest but should do it earlier, in onStop, as an app is "killable" after onStop
+      on Android Honeycomb and later (it can't be done at the moment as the app may be started
+      again after onStop and the sokol lifecycle does not yet handle context teardown/bringup)
+
+
+    LICENSE
+    =======
+    zlib/libpng license
+
+    Copyright (c) 2018 Andre Weissflog
+
+    This software is provided 'as-is', without any express or implied warranty.
+    In no event will the authors be held liable for any damages arising from the
+    use of this software.
+
+    Permission is granted to anyone to use this software for any purpose,
+    including commercial applications, and to alter it and redistribute it
+    freely, subject to the following restrictions:
+
+        1. The origin of this software must not be misrepresented; you must not
+        claim that you wrote the original software. If you use this software in a
+        product, an acknowledgment in the product documentation would be
+        appreciated but is not required.
+
+        2. Altered source versions must be plainly marked as such, and must not
+        be misrepresented as being the original software.
+
+        3. This notice may not be removed or altered from any source
+        distribution.
+*/
+#define SOKOL_APP_INCLUDED (1)
+#include <stddef.h> // size_t
+#include <stdint.h>
+#include <stdbool.h>
+
+#if defined(SOKOL_API_DECL) && !defined(SOKOL_APP_API_DECL)
+#define SOKOL_APP_API_DECL SOKOL_API_DECL
+#endif
+#ifndef SOKOL_APP_API_DECL
+#if defined(_WIN32) && defined(SOKOL_DLL) && defined(SOKOL_APP_IMPL)
+#define SOKOL_APP_API_DECL __declspec(dllexport)
+#elif defined(_WIN32) && defined(SOKOL_DLL)
+#define SOKOL_APP_API_DECL __declspec(dllimport)
+#else
+#define SOKOL_APP_API_DECL extern
+#endif
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* misc constants */
+enum {
+    SAPP_MAX_TOUCHPOINTS = 8,
+    SAPP_MAX_MOUSEBUTTONS = 3,
+    SAPP_MAX_KEYCODES = 512,
+    SAPP_MAX_ICONIMAGES = 8,
+};
+
+/*
+    sapp_event_type
+
+    The type of event that's passed to the event handler callback
+    in the sapp_event.type field. These are not just "traditional"
+    input events, but also notify the application about state changes
+    or other user-invoked actions.
+*/
+typedef enum sapp_event_type {
+    SAPP_EVENTTYPE_INVALID,
+    SAPP_EVENTTYPE_KEY_DOWN,
+    SAPP_EVENTTYPE_KEY_UP,
+    SAPP_EVENTTYPE_CHAR,
+    SAPP_EVENTTYPE_MOUSE_DOWN,
+    SAPP_EVENTTYPE_MOUSE_UP,
+    SAPP_EVENTTYPE_MOUSE_SCROLL,
+    SAPP_EVENTTYPE_MOUSE_MOVE,
+    SAPP_EVENTTYPE_MOUSE_ENTER,
+    SAPP_EVENTTYPE_MOUSE_LEAVE,
+    SAPP_EVENTTYPE_TOUCHES_BEGAN,
+    SAPP_EVENTTYPE_TOUCHES_MOVED,
+    SAPP_EVENTTYPE_TOUCHES_ENDED,
+    SAPP_EVENTTYPE_TOUCHES_CANCELLED,
+    SAPP_EVENTTYPE_RESIZED,
+    SAPP_EVENTTYPE_ICONIFIED,
+    SAPP_EVENTTYPE_RESTORED,
+    SAPP_EVENTTYPE_FOCUSED,
+    SAPP_EVENTTYPE_UNFOCUSED,
+    SAPP_EVENTTYPE_SUSPENDED,
+    SAPP_EVENTTYPE_RESUMED,
+    SAPP_EVENTTYPE_QUIT_REQUESTED,
+    SAPP_EVENTTYPE_CLIPBOARD_PASTED,
+    SAPP_EVENTTYPE_FILES_DROPPED,
+    _SAPP_EVENTTYPE_NUM,
+    _SAPP_EVENTTYPE_FORCE_U32 = 0x7FFFFFFF
+} sapp_event_type;
+
+/*
+    sapp_keycode
+
+    The 'virtual keycode' of a KEY_DOWN or KEY_UP event in the
+    struct field sapp_event.key_code.
+
+    Note that the keycode values are identical with GLFW.
+*/
+typedef enum sapp_keycode {
+    SAPP_KEYCODE_INVALID          = 0,
+    SAPP_KEYCODE_SPACE            = 32,
+    SAPP_KEYCODE_APOSTROPHE       = 39,  /* ' */
+    SAPP_KEYCODE_COMMA            = 44,  /* , */
+    SAPP_KEYCODE_MINUS            = 45,  /* - */
+    SAPP_KEYCODE_PERIOD           = 46,  /* . */
+    SAPP_KEYCODE_SLASH            = 47,  /* / */
+    SAPP_KEYCODE_0                = 48,
+    SAPP_KEYCODE_1                = 49,
+    SAPP_KEYCODE_2                = 50,
+    SAPP_KEYCODE_3                = 51,
+    SAPP_KEYCODE_4                = 52,
+    SAPP_KEYCODE_5                = 53,
+    SAPP_KEYCODE_6                = 54,
+    SAPP_KEYCODE_7                = 55,
+    SAPP_KEYCODE_8                = 56,
+    SAPP_KEYCODE_9                = 57,
+    SAPP_KEYCODE_SEMICOLON        = 59,  /* ; */
+    SAPP_KEYCODE_EQUAL            = 61,  /* = */
+    SAPP_KEYCODE_A                = 65,
+    SAPP_KEYCODE_B                = 66,
+    SAPP_KEYCODE_C                = 67,
+    SAPP_KEYCODE_D                = 68,
+    SAPP_KEYCODE_E                = 69,
+    SAPP_KEYCODE_F                = 70,
+    SAPP_KEYCODE_G                = 71,
+    SAPP_KEYCODE_H                = 72,
+    SAPP_KEYCODE_I                = 73,
+    SAPP_KEYCODE_J                = 74,
+    SAPP_KEYCODE_K                = 75,
+    SAPP_KEYCODE_L                = 76,
+    SAPP_KEYCODE_M                = 77,
+    SAPP_KEYCODE_N                = 78,
+    SAPP_KEYCODE_O                = 79,
+    SAPP_KEYCODE_P                = 80,
+    SAPP_KEYCODE_Q                = 81,
+    SAPP_KEYCODE_R                = 82,
+    SAPP_KEYCODE_S                = 83,
+    SAPP_KEYCODE_T                = 84,
+    SAPP_KEYCODE_U                = 85,
+    SAPP_KEYCODE_V                = 86,
+    SAPP_KEYCODE_W                = 87,
+    SAPP_KEYCODE_X                = 88,
+    SAPP_KEYCODE_Y                = 89,
+    SAPP_KEYCODE_Z                = 90,
+    SAPP_KEYCODE_LEFT_BRACKET     = 91,  /* [ */
+    SAPP_KEYCODE_BACKSLASH        = 92,  /* \ */
+    SAPP_KEYCODE_RIGHT_BRACKET    = 93,  /* ] */
+    SAPP_KEYCODE_GRAVE_ACCENT     = 96,  /* ` */
+    SAPP_KEYCODE_WORLD_1          = 161, /* non-US #1 */
+    SAPP_KEYCODE_WORLD_2          = 162, /* non-US #2 */
+    SAPP_KEYCODE_ESCAPE           = 256,
+    SAPP_KEYCODE_ENTER            = 257,
+    SAPP_KEYCODE_TAB              = 258,
+    SAPP_KEYCODE_BACKSPACE        = 259,
+    SAPP_KEYCODE_INSERT           = 260,
+    SAPP_KEYCODE_DELETE           = 261,
+    SAPP_KEYCODE_RIGHT            = 262,
+    SAPP_KEYCODE_LEFT             = 263,
+    SAPP_KEYCODE_DOWN             = 264,
+    SAPP_KEYCODE_UP               = 265,
+    SAPP_KEYCODE_PAGE_UP          = 266,
+    SAPP_KEYCODE_PAGE_DOWN        = 267,
+    SAPP_KEYCODE_HOME             = 268,
+    SAPP_KEYCODE_END              = 269,
+    SAPP_KEYCODE_CAPS_LOCK        = 280,
+    SAPP_KEYCODE_SCROLL_LOCK      = 281,
+    SAPP_KEYCODE_NUM_LOCK         = 282,
+    SAPP_KEYCODE_PRINT_SCREEN     = 283,
+    SAPP_KEYCODE_PAUSE            = 284,
+    SAPP_KEYCODE_F1               = 290,
+    SAPP_KEYCODE_F2               = 291,
+    SAPP_KEYCODE_F3               = 292,
+    SAPP_KEYCODE_F4               = 293,
+    SAPP_KEYCODE_F5               = 294,
+    SAPP_KEYCODE_F6               = 295,
+    SAPP_KEYCODE_F7               = 296,
+    SAPP_KEYCODE_F8               = 297,
+    SAPP_KEYCODE_F9               = 298,
+    SAPP_KEYCODE_F10              = 299,
+    SAPP_KEYCODE_F11              = 300,
+    SAPP_KEYCODE_F12              = 301,
+    SAPP_KEYCODE_F13              = 302,
+    SAPP_KEYCODE_F14              = 303,
+    SAPP_KEYCODE_F15              = 304,
+    SAPP_KEYCODE_F16              = 305,
+    SAPP_KEYCODE_F17              = 306,
+    SAPP_KEYCODE_F18              = 307,
+    SAPP_KEYCODE_F19              = 308,
+    SAPP_KEYCODE_F20              = 309,
+    SAPP_KEYCODE_F21              = 310,
+    SAPP_KEYCODE_F22              = 311,
+    SAPP_KEYCODE_F23              = 312,
+    SAPP_KEYCODE_F24              = 313,
+    SAPP_KEYCODE_F25              = 314,
+    SAPP_KEYCODE_KP_0             = 320,
+    SAPP_KEYCODE_KP_1             = 321,
+    SAPP_KEYCODE_KP_2             = 322,
+    SAPP_KEYCODE_KP_3             = 323,
+    SAPP_KEYCODE_KP_4             = 324,
+    SAPP_KEYCODE_KP_5             = 325,
+    SAPP_KEYCODE_KP_6             = 326,
+    SAPP_KEYCODE_KP_7             = 327,
+    SAPP_KEYCODE_KP_8             = 328,
+    SAPP_KEYCODE_KP_9             = 329,
+    SAPP_KEYCODE_KP_DECIMAL       = 330,
+    SAPP_KEYCODE_KP_DIVIDE        = 331,
+    SAPP_KEYCODE_KP_MULTIPLY      = 332,
+    SAPP_KEYCODE_KP_SUBTRACT      = 333,
+    SAPP_KEYCODE_KP_ADD           = 334,
+    SAPP_KEYCODE_KP_ENTER         = 335,
+    SAPP_KEYCODE_KP_EQUAL         = 336,
+    SAPP_KEYCODE_LEFT_SHIFT       = 340,
+    SAPP_KEYCODE_LEFT_CONTROL     = 341,
+    SAPP_KEYCODE_LEFT_ALT         = 342,
+    SAPP_KEYCODE_LEFT_SUPER       = 343,
+    SAPP_KEYCODE_RIGHT_SHIFT      = 344,
+    SAPP_KEYCODE_RIGHT_CONTROL    = 345,
+    SAPP_KEYCODE_RIGHT_ALT        = 346,
+    SAPP_KEYCODE_RIGHT_SUPER      = 347,
+    SAPP_KEYCODE_MENU             = 348,
+} sapp_keycode;
+
+/*
+    Android specific 'tool type' enum for touch events. This lets the
+    application check what type of input device was used for
+    touch events.
+
+    NOTE: the values must remain in sync with the corresponding
+    Android SDK type, so don't change those.
+
+    See https://developer.android.com/reference/android/view/MotionEvent#TOOL_TYPE_UNKNOWN
+*/
+typedef enum sapp_android_tooltype {
+    SAPP_ANDROIDTOOLTYPE_UNKNOWN = 0,   // TOOL_TYPE_UNKNOWN
+    SAPP_ANDROIDTOOLTYPE_FINGER = 1,    // TOOL_TYPE_FINGER
+    SAPP_ANDROIDTOOLTYPE_STYLUS = 2,    // TOOL_TYPE_STYLUS
+    SAPP_ANDROIDTOOLTYPE_MOUSE = 3,     // TOOL_TYPE_MOUSE
+} sapp_android_tooltype;
+
+/*
+    sapp_touchpoint
+
+    Describes a single touchpoint in a multitouch event (TOUCHES_BEGAN,
+    TOUCHES_MOVED, TOUCHES_ENDED).
+
+    Touch points are stored in the nested array sapp_event.touches[],
+    and the number of touches is stored in sapp_event.num_touches.
+*/
+typedef struct sapp_touchpoint {
+    uintptr_t identifier;
+    float pos_x;
+    float pos_y;
+    sapp_android_tooltype android_tooltype; // only valid on Android
+    bool changed;
+} sapp_touchpoint;
+
+/*
+    sapp_mousebutton
+
+    The currently pressed mouse button in the events MOUSE_DOWN
+    and MOUSE_UP, stored in the struct field sapp_event.mouse_button.
+*/
+typedef enum sapp_mousebutton {
+    SAPP_MOUSEBUTTON_LEFT = 0x0,
+    SAPP_MOUSEBUTTON_RIGHT = 0x1,
+    SAPP_MOUSEBUTTON_MIDDLE = 0x2,
+    SAPP_MOUSEBUTTON_INVALID = 0x100,
+} sapp_mousebutton;
+
+/*
+    These are currently pressed modifier keys (and mouse buttons) which are
+    passed in the event struct field sapp_event.modifiers.
+*/
+enum {
+    SAPP_MODIFIER_SHIFT = 0x1,      // left or right shift key
+    SAPP_MODIFIER_CTRL  = 0x2,      // left or right control key
+    SAPP_MODIFIER_ALT   = 0x4,      // left or right alt key
+    SAPP_MODIFIER_SUPER = 0x8,      // left or right 'super' key
+    SAPP_MODIFIER_LMB   = 0x100,    // left mouse button
+    SAPP_MODIFIER_RMB   = 0x200,    // right mouse button
+    SAPP_MODIFIER_MMB   = 0x400,    // middle mouse button
+};
+
+/*
+    sapp_event
+
+    This is an all-in-one event struct passed to the event handler
+    user callback function. Note that it depends on the event
+    type what struct fields actually contain useful values, so you
+    should first check the event type before reading other struct
+    fields.
+*/
+typedef struct sapp_event {
+    uint64_t frame_count;               // current frame counter, always valid, useful for checking if two events were issued in the same frame
+    sapp_event_type type;               // the event type, always valid
+    sapp_keycode key_code;              // the virtual key code, only valid in KEY_UP, KEY_DOWN
+    uint32_t char_code;                 // the UTF-32 character code, only valid in CHAR events
+    bool key_repeat;                    // true if this is a key-repeat event, valid in KEY_UP, KEY_DOWN and CHAR
+    uint32_t modifiers;                 // current modifier keys, valid in all key-, char- and mouse-events
+    sapp_mousebutton mouse_button;      // mouse button that was pressed or released, valid in MOUSE_DOWN, MOUSE_UP
+    float mouse_x;                      // current horizontal mouse position in pixels, always valid except during mouse lock
+    float mouse_y;                      // current vertical mouse position in pixels, always valid except during mouse lock
+    float mouse_dx;                     // relative horizontal mouse movement since last frame, always valid
+    float mouse_dy;                     // relative vertical mouse movement since last frame, always valid
+    float scroll_x;                     // horizontal mouse wheel scroll distance, valid in MOUSE_SCROLL events
+    float scroll_y;                     // vertical mouse wheel scroll distance, valid in MOUSE_SCROLL events
+    int num_touches;                    // number of valid items in the touches[] array
+    sapp_touchpoint touches[SAPP_MAX_TOUCHPOINTS];  // current touch points, valid in TOUCHES_BEGIN, TOUCHES_MOVED, TOUCHES_ENDED
+    int window_width;                   // current window- and framebuffer sizes in pixels, always valid
+    int window_height;
+    int framebuffer_width;              // = window_width * dpi_scale
+    int framebuffer_height;             // = window_height * dpi_scale
+} sapp_event;
+
+/*
+    sg_range
+
+    A general pointer/size-pair struct and constructor macros for passing binary blobs
+    into sokol_app.h.
+*/
+typedef struct sapp_range {
+    const void* ptr;
+    size_t size;
+} sapp_range;
+// disabling this for every includer isn't great, but the warnings are also quite pointless
+#if defined(_MSC_VER)
+#pragma warning(disable:4221)   /* /W4 only: nonstandard extension used: 'x': cannot be initialized using address of automatic variable 'y' */
+#pragma warning(disable:4204)   /* VS2015: nonstandard extension used: non-constant aggregate initializer */
+#endif
+#if defined(__cplusplus)
+#define SAPP_RANGE(x) sapp_range{ &x, sizeof(x) }
+#else
+#define SAPP_RANGE(x) (sapp_range){ &x, sizeof(x) }
+#endif
+
+/*
+    sapp_image_desc
+
+    This is used to describe image data to sokol_app.h (at first, window
+    icons, later maybe cursor images).
+
+    Note that the actual image pixel format depends on the use case:
+
+    - window icon pixels are RGBA8
+    - cursor images are ??? (FIXME)
+*/
+typedef struct sapp_image_desc {
+    int width;
+    int height;
+    sapp_range pixels;
+} sapp_image_desc;
+
+/*
+    sapp_icon_desc
+
+    An icon description structure for use in sapp_desc.icon and
+    sapp_set_icon().
+
+    When setting a custom image, the application can provide a number of
+    candidates differing in size, and sokol_app.h will pick the image(s)
+    closest to the size expected by the platform's window system.
+
+    To set sokol-app's default icon, set .sokol_default to true.
+
+    Otherwise provide candidate images of different sizes in the
+    images[] array.
+
+    If both the sokol_default flag is set to true, any image candidates
+    will be ignored and the sokol_app.h default icon will be set.
+*/
+typedef struct sapp_icon_desc {
+    bool sokol_default;
+    sapp_image_desc images[SAPP_MAX_ICONIMAGES];
+} sapp_icon_desc;
+
+/*
+    sapp_allocator
+
+    Used in sapp_desc to provide custom memory-alloc and -free functions
+    to sokol_app.h. If memory management should be overridden, both the
+    alloc and free function must be provided (e.g. it's not valid to
+    override one function but not the other).
+*/
+typedef struct sapp_allocator {
+    void* (*alloc)(size_t size, void* user_data);
+    void (*free)(void* ptr, void* user_data);
+    void* user_data;
+} sapp_allocator;
+
+/*
+    sapp_log_item
+
+    Log items are defined via X-Macros and expanded to an enum
+    'sapp_log_item', and in debug mode to corresponding
+    human readable error messages.
+*/
+#define _SAPP_LOG_ITEMS \
+    _SAPP_LOGITEM_XMACRO(OK, "Ok") \
+    _SAPP_LOGITEM_XMACRO(MALLOC_FAILED, "memory allocation failed") \
+    _SAPP_LOGITEM_XMACRO(MACOS_INVALID_NSOPENGL_PROFILE, "macos: invalid NSOpenGLProfile (valid choices are 1.0, 3.2 and 4.1)") \
+    _SAPP_LOGITEM_XMACRO(WIN32_LOAD_OPENGL32_DLL_FAILED, "failed loading opengl32.dll") \
+    _SAPP_LOGITEM_XMACRO(WIN32_CREATE_HELPER_WINDOW_FAILED, "failed to create helper window") \
+    _SAPP_LOGITEM_XMACRO(WIN32_HELPER_WINDOW_GETDC_FAILED, "failed to get helper window DC") \
+    _SAPP_LOGITEM_XMACRO(WIN32_DUMMY_CONTEXT_SET_PIXELFORMAT_FAILED, "failed to set pixel format for dummy GL context") \
+    _SAPP_LOGITEM_XMACRO(WIN32_CREATE_DUMMY_CONTEXT_FAILED, "failed to create dummy GL context") \
+    _SAPP_LOGITEM_XMACRO(WIN32_DUMMY_CONTEXT_MAKE_CURRENT_FAILED, "failed to make dummy GL context current") \
+    _SAPP_LOGITEM_XMACRO(WIN32_GET_PIXELFORMAT_ATTRIB_FAILED, "failed to get WGL pixel format attribute") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_FIND_PIXELFORMAT_FAILED, "failed to find matching WGL pixel format") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_DESCRIBE_PIXELFORMAT_FAILED, "failed to get pixel format descriptor") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_SET_PIXELFORMAT_FAILED, "failed to set selected pixel format") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_ARB_CREATE_CONTEXT_REQUIRED, "ARB_create_context required") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_ARB_CREATE_CONTEXT_PROFILE_REQUIRED, "ARB_create_context_profile required") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_OPENGL_3_2_NOT_SUPPORTED, "OpenGL 3.2 not supported by GL driver (ERROR_INVALID_VERSION_ARB)") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_OPENGL_PROFILE_NOT_SUPPORTED, "requested OpenGL profile not support by GL driver (ERROR_INVALID_PROFILE_ARB)") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_INCOMPATIBLE_DEVICE_CONTEXT, "CreateContextAttribsARB failed with ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB") \
+    _SAPP_LOGITEM_XMACRO(WIN32_WGL_CREATE_CONTEXT_ATTRIBS_FAILED_OTHER, "CreateContextAttribsARB failed for other reason") \
+    _SAPP_LOGITEM_XMACRO(WIN32_D3D11_CREATE_DEVICE_AND_SWAPCHAIN_WITH_DEBUG_FAILED, "D3D11CreateDeviceAndSwapChain() with D3D11_CREATE_DEVICE_DEBUG failed, retrying without debug flag.") \
+    _SAPP_LOGITEM_XMACRO(WIN32_D3D11_GET_IDXGIFACTORY_FAILED, "could not obtain IDXGIFactory object") \
+    _SAPP_LOGITEM_XMACRO(WIN32_D3D11_GET_IDXGIADAPTER_FAILED, "could not obtain IDXGIAdapter object") \
+    _SAPP_LOGITEM_XMACRO(WIN32_D3D11_QUERY_INTERFACE_IDXGIDEVICE1_FAILED, "could not obtain IDXGIDevice1 interface") \
+    _SAPP_LOGITEM_XMACRO(WIN32_REGISTER_RAW_INPUT_DEVICES_FAILED_MOUSE_LOCK, "RegisterRawInputDevices() failed (on mouse lock)") \
+    _SAPP_LOGITEM_XMACRO(WIN32_REGISTER_RAW_INPUT_DEVICES_FAILED_MOUSE_UNLOCK, "RegisterRawInputDevices() failed (on mouse unlock)") \
+    _SAPP_LOGITEM_XMACRO(WIN32_GET_RAW_INPUT_DATA_FAILED, "GetRawInputData() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_LOAD_LIBGL_FAILED, "failed to load libGL") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_LOAD_ENTRY_POINTS_FAILED, "failed to load GLX entry points") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_EXTENSION_NOT_FOUND, "GLX extension not found") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_QUERY_VERSION_FAILED, "failed to query GLX version") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_VERSION_TOO_LOW, "GLX version too low (need at least 1.3)") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_NO_GLXFBCONFIGS, "glXGetFBConfigs() returned no configs") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_NO_SUITABLE_GLXFBCONFIG, "failed to find a suitable GLXFBConfig") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_GET_VISUAL_FROM_FBCONFIG_FAILED, "glXGetVisualFromFBConfig failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_REQUIRED_EXTENSIONS_MISSING, "GLX extensions ARB_create_context and ARB_create_context_profile missing") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_CREATE_CONTEXT_FAILED, "Failed to create GL context via glXCreateContextAttribsARB") \
+    _SAPP_LOGITEM_XMACRO(LINUX_GLX_CREATE_WINDOW_FAILED, "glXCreateWindow() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_X11_CREATE_WINDOW_FAILED, "XCreateWindow() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_BIND_OPENGL_API_FAILED, "eglBindAPI(EGL_OPENGL_API) failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_BIND_OPENGL_ES_API_FAILED, "eglBindAPI(EGL_OPENGL_ES_API) failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_GET_DISPLAY_FAILED, "eglGetDisplay() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_INITIALIZE_FAILED, "eglInitialize() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_NO_CONFIGS, "eglChooseConfig() returned no configs") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_NO_NATIVE_VISUAL, "eglGetConfigAttrib() for EGL_NATIVE_VISUAL_ID failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_GET_VISUAL_INFO_FAILED, "XGetVisualInfo() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_CREATE_WINDOW_SURFACE_FAILED, "eglCreateWindowSurface() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_CREATE_CONTEXT_FAILED, "eglCreateContext() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_EGL_MAKE_CURRENT_FAILED, "eglMakeCurrent() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_X11_OPEN_DISPLAY_FAILED, "XOpenDisplay() failed") \
+    _SAPP_LOGITEM_XMACRO(LINUX_X11_QUERY_SYSTEM_DPI_FAILED, "failed to query system dpi value, assuming default 96.0") \
+    _SAPP_LOGITEM_XMACRO(LINUX_X11_DROPPED_FILE_URI_WRONG_SCHEME, "dropped file URL doesn't start with 'file://'") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_UNSUPPORTED_INPUT_EVENT_INPUT_CB, "unsupported input event encountered in _sapp_android_input_cb()") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_UNSUPPORTED_INPUT_EVENT_MAIN_CB, "unsupported input event encountered in _sapp_android_main_cb()") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_READ_MSG_FAILED, "failed to read message in _sapp_android_main_cb()") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_WRITE_MSG_FAILED, "failed to write message in _sapp_android_msg") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_CREATE, "MSG_CREATE") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_RESUME, "MSG_RESUME") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_PAUSE, "MSG_PAUSE") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_FOCUS, "MSG_FOCUS") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_NO_FOCUS, "MSG_NO_FOCUS") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_SET_NATIVE_WINDOW, "MSG_SET_NATIVE_WINDOW") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_SET_INPUT_QUEUE, "MSG_SET_INPUT_QUEUE") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_MSG_DESTROY, "MSG_DESTROY") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_UNKNOWN_MSG, "unknown msg type received") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_LOOP_THREAD_STARTED, "loop thread started") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_LOOP_THREAD_DONE, "loop thread done") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONSTART, "NativeActivity onStart()") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONRESUME, "NativeActivity onResume") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONSAVEINSTANCESTATE, "NativeActivity onSaveInstanceState") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONWINDOWFOCUSCHANGED, "NativeActivity onWindowFocusChanged") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONPAUSE, "NativeActivity onPause") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONSTOP, "NativeActivity onStop()") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONNATIVEWINDOWCREATED, "NativeActivity onNativeWindowCreated") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONNATIVEWINDOWDESTROYED, "NativeActivity onNativeWindowDestroyed") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONINPUTQUEUECREATED, "NativeActivity onInputQueueCreated") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONINPUTQUEUEDESTROYED, "NativeActivity onInputQueueDestroyed") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONCONFIGURATIONCHANGED, "NativeActivity onConfigurationChanged") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONLOWMEMORY, "NativeActivity onLowMemory") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONDESTROY, "NativeActivity onDestroy") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_DONE, "NativeActivity done") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_ONCREATE, "NativeActivity onCreate") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_CREATE_THREAD_PIPE_FAILED, "failed to create thread pipe") \
+    _SAPP_LOGITEM_XMACRO(ANDROID_NATIVE_ACTIVITY_CREATE_SUCCESS, "NativeActivity sucessfully created") \
+    _SAPP_LOGITEM_XMACRO(IMAGE_DATA_SIZE_MISMATCH, "image data size mismatch (must be width*height*4 bytes)") \
+    _SAPP_LOGITEM_XMACRO(DROPPED_FILE_PATH_TOO_LONG, "dropped file path too long (sapp_desc.max_dropped_filed_path_length)") \
+    _SAPP_LOGITEM_XMACRO(CLIPBOARD_STRING_TOO_BIG, "clipboard string didn't fit into clipboard buffer") \
+
+#define _SAPP_LOGITEM_XMACRO(item,msg) SAPP_LOGITEM_##item,
+typedef enum sapp_log_item {
+    _SAPP_LOG_ITEMS
+} sapp_log_item;
+#undef _SAPP_LOGITEM_XMACRO
+
+/*
+    sapp_logger
+
+    Used in sapp_desc to provide a logging function. Please be aware that
+    without logging function, sokol-app will be completely silent, e.g. it will
+    not report errors or warnings. For maximum error verbosity, compile in
+    debug mode (e.g. NDEBUG *not* defined) and install a logger (for instance
+    the standard logging function from sokol_log.h).
+*/
+typedef struct sapp_logger {
+    void (*func)(
+        const char* tag,                // always "sapp"
+        uint32_t log_level,             // 0=panic, 1=error, 2=warning, 3=info
+        uint32_t log_item_id,           // SAPP_LOGITEM_*
+        const char* message_or_null,    // a message string, may be nullptr in release mode
+        uint32_t line_nr,               // line number in sokol_app.h
+        const char* filename_or_null,   // source filename, may be nullptr in release mode
+        void* user_data);
+    void* user_data;
+} sapp_logger;
+
+typedef struct sapp_desc {
+    void (*init_cb)(void);                  // these are the user-provided callbacks without user data
+    void (*frame_cb)(void);
+    void (*cleanup_cb)(void);
+    void (*event_cb)(const sapp_event*);
+
+    void* user_data;                        // these are the user-provided callbacks with user data
+    void (*init_userdata_cb)(void*);
+    void (*frame_userdata_cb)(void*);
+    void (*cleanup_userdata_cb)(void*);
+    void (*event_userdata_cb)(const sapp_event*, void*);
+
+    int width;                          // the preferred width of the window / canvas
+    int height;                         // the preferred height of the window / canvas
+    int sample_count;                   // MSAA sample count
+    int swap_interval;                  // the preferred swap interval (ignored on some platforms)
+    bool high_dpi;                      // whether the rendering canvas is full-resolution on HighDPI displays
+    bool fullscreen;                    // whether the window should be created in fullscreen mode
+    bool alpha;                         // whether the framebuffer should have an alpha channel (ignored on some platforms)
+    const char* window_title;           // the window title as UTF-8 encoded string
+    bool enable_clipboard;              // enable clipboard access, default is false
+    int clipboard_size;                 // max size of clipboard content in bytes
+    bool enable_dragndrop;              // enable file dropping (drag'n'drop), default is false
+    int max_dropped_files;              // max number of dropped files to process (default: 1)
+    int max_dropped_file_path_length;   // max length in bytes of a dropped UTF-8 file path (default: 2048)
+    sapp_icon_desc icon;                // the initial window icon to set
+    sapp_allocator allocator;           // optional memory allocation overrides (default: malloc/free)
+    sapp_logger logger;                 // logging callback override (default: NO LOGGING!)
+
+    /* backend-specific options */
+    int gl_major_version;               // override GL major and minor version (the default GL version is 3.2)
+    int gl_minor_version;
+    bool win32_console_utf8;            // if true, set the output console codepage to UTF-8
+    bool win32_console_create;          // if true, attach stdout/stderr to a new console window
+    bool win32_console_attach;          // if true, attach stdout/stderr to parent process
+    const char* html5_canvas_name;      // the name (id) of the HTML5 canvas element, default is "canvas"
+    bool html5_canvas_resize;           // if true, the HTML5 canvas size is set to sapp_desc.width/height, otherwise canvas size is tracked
+    bool html5_preserve_drawing_buffer; // HTML5 only: whether to preserve default framebuffer content between frames
+    bool html5_premultiplied_alpha;     // HTML5 only: whether the rendered pixels use premultiplied alpha convention
+    bool html5_ask_leave_site;          // initial state of the internal html5_ask_leave_site flag (see sapp_html5_ask_leave_site())
+    bool ios_keyboard_resizes_canvas;   // if true, showing the iOS keyboard shrinks the canvas
+} sapp_desc;
+
+/* HTML5 specific: request and response structs for
+   asynchronously loading dropped-file content.
+*/
+typedef enum sapp_html5_fetch_error {
+    SAPP_HTML5_FETCH_ERROR_NO_ERROR,
+    SAPP_HTML5_FETCH_ERROR_BUFFER_TOO_SMALL,
+    SAPP_HTML5_FETCH_ERROR_OTHER,
+} sapp_html5_fetch_error;
+
+typedef struct sapp_html5_fetch_response {
+    bool succeeded;         // true if the loading operation has succeeded
+    sapp_html5_fetch_error error_code;
+    int file_index;         // index of the dropped file (0..sapp_get_num_dropped_filed()-1)
+    sapp_range data;        // pointer and size of the fetched data (data.ptr == buffer.ptr, data.size <= buffer.size)
+    sapp_range buffer;      // the user-provided buffer ptr/size pair (buffer.ptr == data.ptr, buffer.size >= data.size)
+    void* user_data;        // user-provided user data pointer
+} sapp_html5_fetch_response;
+
+typedef struct sapp_html5_fetch_request {
+    int dropped_file_index; // 0..sapp_get_num_dropped_files()-1
+    void (*callback)(const sapp_html5_fetch_response*);     // response callback function pointer (required)
+    sapp_range buffer;      // ptr/size of a memory buffer to load the data into
+    void* user_data;        // optional userdata pointer
+} sapp_html5_fetch_request;
+
+/*
+    sapp_mouse_cursor
+
+    Predefined cursor image definitions, set with sapp_set_mouse_cursor(sapp_mouse_cursor cursor)
+*/
+typedef enum sapp_mouse_cursor {
+    SAPP_MOUSECURSOR_DEFAULT = 0,   // equivalent with system default cursor
+    SAPP_MOUSECURSOR_ARROW,
+    SAPP_MOUSECURSOR_IBEAM,
+    SAPP_MOUSECURSOR_CROSSHAIR,
+    SAPP_MOUSECURSOR_POINTING_HAND,
+    SAPP_MOUSECURSOR_RESIZE_EW,
+    SAPP_MOUSECURSOR_RESIZE_NS,
+    SAPP_MOUSECURSOR_RESIZE_NWSE,
+    SAPP_MOUSECURSOR_RESIZE_NESW,
+    SAPP_MOUSECURSOR_RESIZE_ALL,
+    SAPP_MOUSECURSOR_NOT_ALLOWED,
+    _SAPP_MOUSECURSOR_NUM,
+} sapp_mouse_cursor;
+
+/* user-provided functions */
+extern sapp_desc sokol_main(int argc, char* argv[]);
+
+/* returns true after sokol-app has been initialized */
+SOKOL_APP_API_DECL bool sapp_isvalid(void);
+/* returns the current framebuffer width in pixels */
+SOKOL_APP_API_DECL int sapp_width(void);
+/* same as sapp_width(), but returns float */
+SOKOL_APP_API_DECL float sapp_widthf(void);
+/* returns the current framebuffer height in pixels */
+SOKOL_APP_API_DECL int sapp_height(void);
+/* same as sapp_height(), but returns float */
+SOKOL_APP_API_DECL float sapp_heightf(void);
+/* get default framebuffer color pixel format */
+SOKOL_APP_API_DECL int sapp_color_format(void);
+/* get default framebuffer depth pixel format */
+SOKOL_APP_API_DECL int sapp_depth_format(void);
+/* get default framebuffer sample count */
+SOKOL_APP_API_DECL int sapp_sample_count(void);
+/* returns true when high_dpi was requested and actually running in a high-dpi scenario */
+SOKOL_APP_API_DECL bool sapp_high_dpi(void);
+/* returns the dpi scaling factor (window pixels to framebuffer pixels) */
+SOKOL_APP_API_DECL float sapp_dpi_scale(void);
+/* show or hide the mobile device onscreen keyboard */
+SOKOL_APP_API_DECL void sapp_show_keyboard(bool show);
+/* return true if the mobile device onscreen keyboard is currently shown */
+SOKOL_APP_API_DECL bool sapp_keyboard_shown(void);
+/* query fullscreen mode */
+SOKOL_APP_API_DECL bool sapp_is_fullscreen(void);
+/* toggle fullscreen mode */
+SOKOL_APP_API_DECL void sapp_toggle_fullscreen(void);
+/* show or hide the mouse cursor */
+SOKOL_APP_API_DECL void sapp_show_mouse(bool show);
+/* show or hide the mouse cursor */
+SOKOL_APP_API_DECL bool sapp_mouse_shown(void);
+/* enable/disable mouse-pointer-lock mode */
+SOKOL_APP_API_DECL void sapp_lock_mouse(bool lock);
+/* return true if in mouse-pointer-lock mode (this may toggle a few frames later) */
+SOKOL_APP_API_DECL bool sapp_mouse_locked(void);
+/* set mouse cursor type */
+SOKOL_APP_API_DECL void sapp_set_mouse_cursor(sapp_mouse_cursor cursor);
+/* get current mouse cursor type */
+SOKOL_APP_API_DECL sapp_mouse_cursor sapp_get_mouse_cursor(void);
+/* return the userdata pointer optionally provided in sapp_desc */
+SOKOL_APP_API_DECL void* sapp_userdata(void);
+/* return a copy of the sapp_desc structure */
+SOKOL_APP_API_DECL sapp_desc sapp_query_desc(void);
+/* initiate a "soft quit" (sends SAPP_EVENTTYPE_QUIT_REQUESTED) */
+SOKOL_APP_API_DECL void sapp_request_quit(void);
+/* cancel a pending quit (when SAPP_EVENTTYPE_QUIT_REQUESTED has been received) */
+SOKOL_APP_API_DECL void sapp_cancel_quit(void);
+/* initiate a "hard quit" (quit application without sending SAPP_EVENTTYPE_QUIT_REQUSTED) */
+SOKOL_APP_API_DECL void sapp_quit(void);
+/* call from inside event callback to consume the current event (don't forward to platform) */
+SOKOL_APP_API_DECL void sapp_consume_event(void);
+/* get the current frame counter (for comparison with sapp_event.frame_count) */
+SOKOL_APP_API_DECL uint64_t sapp_frame_count(void);
+/* get an averaged/smoothed frame duration in seconds */
+SOKOL_APP_API_DECL double sapp_frame_duration(void);
+/* write string into clipboard */
+SOKOL_APP_API_DECL void sapp_set_clipboard_string(const char* str);
+/* read string from clipboard (usually during SAPP_EVENTTYPE_CLIPBOARD_PASTED) */
+SOKOL_APP_API_DECL const char* sapp_get_clipboard_string(void);
+/* set the window title (only on desktop platforms) */
+SOKOL_APP_API_DECL void sapp_set_window_title(const char* str);
+/* set the window icon (only on Windows and Linux) */
+SOKOL_APP_API_DECL void sapp_set_icon(const sapp_icon_desc* icon_desc);
+/* gets the total number of dropped files (after an SAPP_EVENTTYPE_FILES_DROPPED event) */
+SOKOL_APP_API_DECL int sapp_get_num_dropped_files(void);
+/* gets the dropped file paths */
+SOKOL_APP_API_DECL const char* sapp_get_dropped_file_path(int index);
+
+/* special run-function for SOKOL_NO_ENTRY (in standard mode this is an empty stub) */
+SOKOL_APP_API_DECL void sapp_run(const sapp_desc* desc);
+
+/* EGL: get EGLDisplay object */
+SOKOL_APP_API_DECL const void* sapp_egl_get_display(void);
+/* EGL: get EGLContext object */
+SOKOL_APP_API_DECL const void* sapp_egl_get_context(void);
+
+/* HTML5: enable or disable the hardwired "Leave Site?" dialog box */
+SOKOL_APP_API_DECL void sapp_html5_ask_leave_site(bool ask);
+/* HTML5: get byte size of a dropped file */
+SOKOL_APP_API_DECL uint32_t sapp_html5_get_dropped_file_size(int index);
+/* HTML5: asynchronously load the content of a dropped file */
+SOKOL_APP_API_DECL void sapp_html5_fetch_dropped_file(const sapp_html5_fetch_request* request);
+
+/* Metal: get bridged pointer to Metal device object */
+SOKOL_APP_API_DECL const void* sapp_metal_get_device(void);
+/* Metal: get bridged pointer to this frame's renderpass descriptor */
+SOKOL_APP_API_DECL const void* sapp_metal_get_renderpass_descriptor(void);
+/* Metal: get bridged pointer to current drawable */
+SOKOL_APP_API_DECL const void* sapp_metal_get_drawable(void);
+/* macOS: get bridged pointer to macOS NSWindow */
+SOKOL_APP_API_DECL const void* sapp_macos_get_window(void);
+/* iOS: get bridged pointer to iOS UIWindow */
+SOKOL_APP_API_DECL const void* sapp_ios_get_window(void);
+
+/* D3D11: get pointer to ID3D11Device object */
+SOKOL_APP_API_DECL const void* sapp_d3d11_get_device(void);
+/* D3D11: get pointer to ID3D11DeviceContext object */
+SOKOL_APP_API_DECL const void* sapp_d3d11_get_device_context(void);
+/* D3D11: get pointer to IDXGISwapChain object */
+SOKOL_APP_API_DECL const void* sapp_d3d11_get_swap_chain(void);
+/* D3D11: get pointer to ID3D11RenderTargetView object */
+SOKOL_APP_API_DECL const void* sapp_d3d11_get_render_target_view(void);
+/* D3D11: get pointer to ID3D11DepthStencilView */
+SOKOL_APP_API_DECL const void* sapp_d3d11_get_depth_stencil_view(void);
+/* Win32: get the HWND window handle */
+SOKOL_APP_API_DECL const void* sapp_win32_get_hwnd(void);
+
+/* WebGPU: get WGPUDevice handle */
+SOKOL_APP_API_DECL const void* sapp_wgpu_get_device(void);
+/* WebGPU: get swapchain's WGPUTextureView handle for rendering */
+SOKOL_APP_API_DECL const void* sapp_wgpu_get_render_view(void);
+/* WebGPU: get swapchain's MSAA-resolve WGPUTextureView (may return null) */
+SOKOL_APP_API_DECL const void* sapp_wgpu_get_resolve_view(void);
+/* WebGPU: get swapchain's WGPUTextureView for the depth-stencil surface */
+SOKOL_APP_API_DECL const void* sapp_wgpu_get_depth_stencil_view(void);
+
+/* Android: get native activity handle */
+SOKOL_APP_API_DECL const void* sapp_android_get_native_activity(void);
+
+#ifdef __cplusplus
+} /* extern "C" */
+
+/* reference-based equivalents for C++ */
+inline void sapp_run(const sapp_desc& desc) { return sapp_run(&desc); }
+
+#endif
+
+// this WinRT specific hack is required when wWinMain is in a static library
+#if defined(_MSC_VER) && defined(UNICODE)
+#include <winapifamily.h>
+#if defined(WINAPI_FAMILY_PARTITION) && !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#pragma comment(linker, "/include:wWinMain")
+#endif
+#endif
+
+#endif // SOKOL_APP_INCLUDED
+
+// ██ ███    ███ ██████  ██      ███████ ███    ███ ███████ ███    ██ ████████  █████  ████████ ██  ██████  ███    ██
+// ██ ████  ████ ██   ██ ██      ██      ████  ████ ██      ████   ██    ██    ██   ██    ██    ██ ██    ██ ████   ██
+// ██ ██ ████ ██ ██████  ██      █████   ██ ████ ██ █████   ██ ██  ██    ██    ███████    ██    ██ ██    ██ ██ ██  ██
+// ██ ██  ██  ██ ██      ██      ██      ██  ██  ██ ██      ██  ██ ██    ██    ██   ██    ██    ██ ██    ██ ██  ██ ██
+// ██ ██      ██ ██      ███████ ███████ ██      ██ ███████ ██   ████    ██    ██   ██    ██    ██  ██████  ██   ████
+//
+// >>implementation
+#ifdef SOKOL_APP_IMPL
+#define SOKOL_APP_IMPL_INCLUDED (1)
+
+#if defined(SOKOL_MALLOC) || defined(SOKOL_CALLOC) || defined(SOKOL_FREE)
+#error "SOKOL_MALLOC/CALLOC/FREE macros are no longer supported, please use sapp_desc.allocator to override memory allocation functions"
+#endif
+
+#include <stdlib.h> // malloc, free
+#include <string.h> // memset
+#include <stddef.h> // size_t
+#include <math.h>   // roundf
+
+/* check if the config defines are alright */
+#if defined(__APPLE__)
+    // see https://clang.llvm.org/docs/LanguageExtensions.html#automatic-reference-counting
+    #if !defined(__cplusplus)
+        #if __has_feature(objc_arc) && !__has_feature(objc_arc_fields)
+            #error "sokol_app.h requires __has_feature(objc_arc_field) if ARC is enabled (use a more recent compiler version)"
+        #endif
+    #endif
+    #define _SAPP_APPLE (1)
+    #include <TargetConditionals.h>
+    #if defined(TARGET_OS_IPHONE) && !TARGET_OS_IPHONE
+        /* MacOS */
+        #define _SAPP_MACOS (1)
+        #if !defined(SOKOL_METAL) && !defined(SOKOL_GLCORE33)
+        #error("sokol_app.h: unknown 3D API selected for MacOS, must be SOKOL_METAL or SOKOL_GLCORE33")
+        #endif
+    #else
+        /* iOS or iOS Simulator */
+        #define _SAPP_IOS (1)
+        #if !defined(SOKOL_METAL) && !defined(SOKOL_GLES3)
+        #error("sokol_app.h: unknown 3D API selected for iOS, must be SOKOL_METAL or SOKOL_GLES3")
+        #endif
+    #endif
+#elif defined(__EMSCRIPTEN__)
+    /* emscripten (asm.js or wasm) */
+    #define _SAPP_EMSCRIPTEN (1)
+    #if !defined(SOKOL_GLES3) && !defined(SOKOL_WGPU)
+    #error("sokol_app.h: unknown 3D API selected for emscripten, must be SOKOL_GLES3 or SOKOL_WGPU")
+    #endif
+#elif defined(_WIN32)
+    /* Windows (D3D11 or GL) */
+    #define _SAPP_WIN32 (1)
+    #if !defined(SOKOL_D3D11) && !defined(SOKOL_GLCORE33)
+    #error("sokol_app.h: unknown 3D API selected for Win32, must be SOKOL_D3D11 or SOKOL_GLCORE33")
+    #endif
+#elif defined(__ANDROID__)
+    /* Android */
+    #define _SAPP_ANDROID (1)
+    #if !defined(SOKOL_GLES3)
+    #error("sokol_app.h: unknown 3D API selected for Android, must be SOKOL_GLES3")
+    #endif
+    #if defined(SOKOL_NO_ENTRY)
+    #error("sokol_app.h: SOKOL_NO_ENTRY is not supported on Android")
+    #endif
+#elif defined(__linux__) || defined(__unix__)
+    /* Linux */
+    #define _SAPP_LINUX (1)
+    #if defined(SOKOL_GLCORE33)
+        #if !defined(SOKOL_FORCE_EGL)
+            #define _SAPP_GLX (1)
+        #endif
+    #elif !defined(SOKOL_GLES3)
+        #error("sokol_app.h: unknown 3D API selected for Linux, must be SOKOL_GLCORE33, SOKOL_GLES3")
+    #endif
+#else
+#error "sokol_app.h: Unknown platform"
+#endif
+
+#ifndef SOKOL_API_IMPL
+    #define SOKOL_API_IMPL
+#endif
+#ifndef SOKOL_DEBUG
+    #ifndef NDEBUG
+        #define SOKOL_DEBUG
+    #endif
+#endif
+#ifndef SOKOL_ASSERT
+    #include <assert.h>
+    #define SOKOL_ASSERT(c) assert(c)
+#endif
+#ifndef SOKOL_UNREACHABLE
+    #define SOKOL_UNREACHABLE SOKOL_ASSERT(false)
+#endif
+
+#ifndef _SOKOL_PRIVATE
+    #if defined(__GNUC__) || defined(__clang__)
+        #define _SOKOL_PRIVATE __attribute__((unused)) static
+    #else
+        #define _SOKOL_PRIVATE static
+    #endif
+#endif
+#ifndef _SOKOL_UNUSED
+    #define _SOKOL_UNUSED(x) (void)(x)
+#endif
+
+#if defined(_SAPP_APPLE)
+    #if defined(SOKOL_METAL)
+        #import <Metal/Metal.h>
+        #import <MetalKit/MetalKit.h>
+    #endif
+    #if defined(_SAPP_MACOS)
+        #if !defined(SOKOL_METAL)
+            #ifndef GL_SILENCE_DEPRECATION
+            #define GL_SILENCE_DEPRECATION
+            #endif
+            #include <Cocoa/Cocoa.h>
+        #endif
+    #elif defined(_SAPP_IOS)
+        #import <UIKit/UIKit.h>
+        #if !defined(SOKOL_METAL)
+            #import <GLKit/GLKit.h>
+        #endif
+    #endif
+    #include <AvailabilityMacros.h>
+    #include <mach/mach_time.h>
+#elif defined(_SAPP_EMSCRIPTEN)
+    #if defined(SOKOL_WGPU)
+        #include <webgpu/webgpu.h>
+    #endif
+    #include <emscripten/emscripten.h>
+    #include <emscripten/html5.h>
+#elif defined(_SAPP_WIN32)
+    #ifdef _MSC_VER
+        #pragma warning(push)
+        #pragma warning(disable:4201)   /* nonstandard extension used: nameless struct/union */
+        #pragma warning(disable:4204)   /* nonstandard extension used: non-constant aggregate initializer */
+        #pragma warning(disable:4054)   /* 'type cast': from function pointer */
+        #pragma warning(disable:4055)   /* 'type cast': from data pointer */
+        #pragma warning(disable:4505)   /* unreferenced local function has been removed */
+        #pragma warning(disable:4115)   /* /W4: 'ID3D11ModuleInstance': named type definition in parentheses (in d3d11.h) */
+    #endif
+    #ifndef WIN32_LEAN_AND_MEAN
+        #define WIN32_LEAN_AND_MEAN
+    #endif
+    #ifndef NOMINMAX
+        #define NOMINMAX
+    #endif
+    #include <windows.h>
+    #include <windowsx.h>
+    #include <shellapi.h>
+    #if !defined(SOKOL_NO_ENTRY)    // if SOKOL_NO_ENTRY is defined, it's the applications' responsibility to use the right subsystem
+        #if defined(SOKOL_WIN32_FORCE_MAIN)
+            #pragma comment (linker, "/subsystem:console")
+        #else
+            #pragma comment (linker, "/subsystem:windows")
+        #endif
+    #endif
+    #include <stdio.h>  /* freopen_s() */
+    #include <wchar.h>  /* wcslen() */
+
+    #pragma comment (lib, "kernel32")
+    #pragma comment (lib, "user32")
+    #pragma comment (lib, "shell32")    /* CommandLineToArgvW, DragQueryFileW, DragFinished */
+    #pragma comment (lib, "gdi32")
+    #if defined(SOKOL_D3D11)
+        #pragma comment (lib, "dxgi")
+        #pragma comment (lib, "d3d11")
+    #endif
+
+    #if defined(SOKOL_D3D11)
+        #ifndef D3D11_NO_HELPERS
+            #define D3D11_NO_HELPERS
+        #endif
+        #include <d3d11.h>
+        #include <dxgi.h>
+        // DXGI_SWAP_EFFECT_FLIP_DISCARD is only defined in newer Windows SDKs, so don't depend on it
+        #define _SAPP_DXGI_SWAP_EFFECT_FLIP_DISCARD (4)
+    #endif
+    #ifndef WM_MOUSEHWHEEL /* see https://github.com/floooh/sokol/issues/138 */
+        #define WM_MOUSEHWHEEL (0x020E)
+    #endif
+    #ifndef WM_DPICHANGED
+        #define WM_DPICHANGED (0x02E0)
+    #endif
+#elif defined(_SAPP_ANDROID)
+    #include <pthread.h>
+    #include <unistd.h>
+    #include <time.h>
+    #include <android/native_activity.h>
+    #include <android/looper.h>
+    #include <EGL/egl.h>
+#elif defined(_SAPP_LINUX)
+    #define GL_GLEXT_PROTOTYPES
+    #include <X11/Xlib.h>
+    #include <X11/Xutil.h>
+    #include <X11/XKBlib.h>
+    #include <X11/keysym.h>
+    #include <X11/Xresource.h>
+    #include <X11/Xatom.h>
+    #include <X11/extensions/XInput2.h>
+    #include <X11/Xcursor/Xcursor.h>
+    #include <X11/cursorfont.h> /* XC_* font cursors */
+    #include <X11/Xmd.h> /* CARD32 */
+    #if !defined(_SAPP_GLX)
+        #include <EGL/egl.h>
+    #endif
+    #include <dlfcn.h> /* dlopen, dlsym, dlclose */
+    #include <limits.h> /* LONG_MAX */
+    #include <pthread.h>    /* only used a linker-guard, search for _sapp_linux_run() and see first comment */
+    #include <time.h>
+#endif
+
+// ███████ ██████   █████  ███    ███ ███████     ████████ ██ ███    ███ ██ ███    ██  ██████
+// ██      ██   ██ ██   ██ ████  ████ ██             ██    ██ ████  ████ ██ ████   ██ ██
+// █████   ██████  ███████ ██ ████ ██ █████          ██    ██ ██ ████ ██ ██ ██ ██  ██ ██   ███
+// ██      ██   ██ ██   ██ ██  ██  ██ ██             ██    ██ ██  ██  ██ ██ ██  ██ ██ ██    ██
+// ██      ██   ██ ██   ██ ██      ██ ███████        ██    ██ ██      ██ ██ ██   ████  ██████
+//
+// >>frame timing
+#define _SAPP_RING_NUM_SLOTS (256)
+typedef struct {
+    int head;
+    int tail;
+    double buf[_SAPP_RING_NUM_SLOTS];
+} _sapp_ring_t;
+
+_SOKOL_PRIVATE int _sapp_ring_idx(int i) {
+    return i % _SAPP_RING_NUM_SLOTS;
+}
+
+_SOKOL_PRIVATE void _sapp_ring_init(_sapp_ring_t* ring) {
+    ring->head = 0;
+    ring->tail = 0;
+}
+
+_SOKOL_PRIVATE bool _sapp_ring_full(_sapp_ring_t* ring) {
+    return _sapp_ring_idx(ring->head + 1) == ring->tail;
+}
+
+_SOKOL_PRIVATE bool _sapp_ring_empty(_sapp_ring_t* ring) {
+    return ring->head == ring->tail;
+}
+
+_SOKOL_PRIVATE int _sapp_ring_count(_sapp_ring_t* ring) {
+    int count;
+    if (ring->head >= ring->tail) {
+        count = ring->head - ring->tail;
+    }
+    else {
+        count = (ring->head + _SAPP_RING_NUM_SLOTS) - ring->tail;
+    }
+    SOKOL_ASSERT((count >= 0) && (count < _SAPP_RING_NUM_SLOTS));
+    return count;
+}
+
+_SOKOL_PRIVATE void _sapp_ring_enqueue(_sapp_ring_t* ring, double val) {
+    SOKOL_ASSERT(!_sapp_ring_full(ring));
+    ring->buf[ring->head] = val;
+    ring->head = _sapp_ring_idx(ring->head + 1);
+}
+
+_SOKOL_PRIVATE double _sapp_ring_dequeue(_sapp_ring_t* ring) {
+    SOKOL_ASSERT(!_sapp_ring_empty(ring));
+    double val = ring->buf[ring->tail];
+    ring->tail = _sapp_ring_idx(ring->tail + 1);
+    return val;
+}
+
+/*
+    NOTE:
+
+    Q: Why not use CAMetalDrawable.presentedTime on macOS and iOS?
+    A: The value appears to be highly unstable during the first few
+    seconds, sometimes several frames are dropped in sequence, or
+    switch between 120 and 60 Hz for a few frames. Simply measuring
+    and averaging the frame time yielded a more stable frame duration.
+    Maybe switching to CVDisplayLink would yield better results.
+    Until then just measure the time.
+*/
+typedef struct {
+    #if defined(_SAPP_APPLE)
+        struct {
+            mach_timebase_info_data_t timebase;
+            uint64_t start;
+        } mach;
+    #elif defined(_SAPP_EMSCRIPTEN)
+        // empty
+    #elif defined(_SAPP_WIN32)
+        struct {
+            LARGE_INTEGER freq;
+            LARGE_INTEGER start;
+        } win;
+    #else // Linux, Android, ...
+        #ifdef CLOCK_MONOTONIC
+        #define _SAPP_CLOCK_MONOTONIC CLOCK_MONOTONIC
+        #else
+        // on some embedded platforms, CLOCK_MONOTONIC isn't defined
+        #define _SAPP_CLOCK_MONOTONIC (1)
+        #endif
+        struct {
+            uint64_t start;
+        } posix;
+    #endif
+} _sapp_timestamp_t;
+
+_SOKOL_PRIVATE int64_t _sapp_int64_muldiv(int64_t value, int64_t numer, int64_t denom) {
+    int64_t q = value / denom;
+    int64_t r = value % denom;
+    return q * numer + r * numer / denom;
+}
+
+_SOKOL_PRIVATE void _sapp_timestamp_init(_sapp_timestamp_t* ts) {
+    #if defined(_SAPP_APPLE)
+        mach_timebase_info(&ts->mach.timebase);
+        ts->mach.start = mach_absolute_time();
+    #elif defined(_SAPP_EMSCRIPTEN)
+        (void)ts;
+    #elif defined(_SAPP_WIN32)
+        QueryPerformanceFrequency(&ts->win.freq);
+        QueryPerformanceCounter(&ts->win.start);
+    #else
+        struct timespec tspec;
+        clock_gettime(_SAPP_CLOCK_MONOTONIC, &tspec);
+        ts->posix.start = (uint64_t)tspec.tv_sec*1000000000 + (uint64_t)tspec.tv_nsec;
+    #endif
+}
+
+_SOKOL_PRIVATE double _sapp_timestamp_now(_sapp_timestamp_t* ts) {
+    #if defined(_SAPP_APPLE)
+        const uint64_t traw = mach_absolute_time() - ts->mach.start;
+        const uint64_t now = (uint64_t) _sapp_int64_muldiv((int64_t)traw, (int64_t)ts->mach.timebase.numer, (int64_t)ts->mach.timebase.denom);
+        return (double)now / 1000000000.0;
+    #elif defined(_SAPP_EMSCRIPTEN)
+        (void)ts;
+        SOKOL_ASSERT(false);
+        return 0.0;
+    #elif defined(_SAPP_WIN32)
+        LARGE_INTEGER qpc;
+        QueryPerformanceCounter(&qpc);
+        const uint64_t now = (uint64_t)_sapp_int64_muldiv(qpc.QuadPart - ts->win.start.QuadPart, 1000000000, ts->win.freq.QuadPart);
+        return (double)now / 1000000000.0;
+    #else
+        struct timespec tspec;
+        clock_gettime(_SAPP_CLOCK_MONOTONIC, &tspec);
+        const uint64_t now = ((uint64_t)tspec.tv_sec*1000000000 + (uint64_t)tspec.tv_nsec) - ts->posix.start;
+        return (double)now / 1000000000.0;
+    #endif
+}
+
+typedef struct {
+    double last;
+    double accum;
+    double avg;
+    int spike_count;
+    int num;
+    _sapp_timestamp_t timestamp;
+    _sapp_ring_t ring;
+} _sapp_timing_t;
+
+_SOKOL_PRIVATE void _sapp_timing_reset(_sapp_timing_t* t) {
+    t->last = 0.0;
+    t->accum = 0.0;
+    t->spike_count = 0;
+    t->num = 0;
+    _sapp_ring_init(&t->ring);
+}
+
+_SOKOL_PRIVATE void _sapp_timing_init(_sapp_timing_t* t) {
+    t->avg = 1.0 / 60.0;    // dummy value until first actual value is available
+    _sapp_timing_reset(t);
+    _sapp_timestamp_init(&t->timestamp);
+}
+
+_SOKOL_PRIVATE void _sapp_timing_put(_sapp_timing_t* t, double dur) {
+    // arbitrary upper limit to ignore outliers (e.g. during window resizing, or debugging)
+    double min_dur = 0.0;
+    double max_dur = 0.1;
+    // if we have enough samples for a useful average, use a much tighter 'valid window'
+    if (_sapp_ring_full(&t->ring)) {
+        min_dur = t->avg * 0.8;
+        max_dur = t->avg * 1.2;
+    }
+    if ((dur < min_dur) || (dur > max_dur)) {
+        t->spike_count++;
+        // if there have been many spikes in a row, the display refresh rate
+        // might have changed, so a timing reset is needed
+        if (t->spike_count > 20) {
+            _sapp_timing_reset(t);
+        }
+        return;
+    }
+    if (_sapp_ring_full(&t->ring)) {
+        double old_val = _sapp_ring_dequeue(&t->ring);
+        t->accum -= old_val;
+        t->num -= 1;
+    }
+    _sapp_ring_enqueue(&t->ring, dur);
+    t->accum += dur;
+    t->num += 1;
+    SOKOL_ASSERT(t->num > 0);
+    t->avg = t->accum / t->num;
+    t->spike_count = 0;
+}
+
+_SOKOL_PRIVATE void _sapp_timing_discontinuity(_sapp_timing_t* t) {
+    t->last = 0.0;
+}
+
+_SOKOL_PRIVATE void _sapp_timing_measure(_sapp_timing_t* t) {
+    const double now = _sapp_timestamp_now(&t->timestamp);
+    if (t->last > 0.0) {
+        double dur = now - t->last;
+        _sapp_timing_put(t, dur);
+    }
+    t->last = now;
+}
+
+_SOKOL_PRIVATE void _sapp_timing_external(_sapp_timing_t* t, double now) {
+    if (t->last > 0.0) {
+        double dur = now - t->last;
+        _sapp_timing_put(t, dur);
+    }
+    t->last = now;
+}
+
+_SOKOL_PRIVATE double _sapp_timing_get_avg(_sapp_timing_t* t) {
+    return t->avg;
+}
+
+// ███████ ████████ ██████  ██    ██  ██████ ████████ ███████
+// ██         ██    ██   ██ ██    ██ ██         ██    ██
+// ███████    ██    ██████  ██    ██ ██         ██    ███████
+//      ██    ██    ██   ██ ██    ██ ██         ██         ██
+// ███████    ██    ██   ██  ██████   ██████    ██    ███████
+//
+// >> structs
+#if defined(_SAPP_MACOS)
+@interface _sapp_macos_app_delegate : NSObject<NSApplicationDelegate>
+@end
+@interface _sapp_macos_window : NSWindow
+@end
+@interface _sapp_macos_window_delegate : NSObject<NSWindowDelegate>
+@end
+#if defined(SOKOL_METAL)
+    @interface _sapp_macos_view : MTKView
+    @end
+#elif defined(SOKOL_GLCORE33)
+    @interface _sapp_macos_view : NSOpenGLView
+    - (void)timerFired:(id)sender;
+    @end
+#endif // SOKOL_GLCORE33
+
+typedef struct {
+    uint32_t flags_changed_store;
+    uint8_t mouse_buttons;
+    NSWindow* window;
+    NSTrackingArea* tracking_area;
+    id keyup_monitor;
+    _sapp_macos_app_delegate* app_dlg;
+    _sapp_macos_window_delegate* win_dlg;
+    _sapp_macos_view* view;
+    NSCursor* cursors[_SAPP_MOUSECURSOR_NUM];
+    #if defined(SOKOL_METAL)
+        id<MTLDevice> mtl_device;
+    #endif
+} _sapp_macos_t;
+
+#endif // _SAPP_MACOS
+
+#if defined(_SAPP_IOS)
+
+@interface _sapp_app_delegate : NSObject<UIApplicationDelegate>
+@end
+@interface _sapp_textfield_dlg : NSObject<UITextFieldDelegate>
+- (void)keyboardWasShown:(NSNotification*)notif;
+- (void)keyboardWillBeHidden:(NSNotification*)notif;
+- (void)keyboardDidChangeFrame:(NSNotification*)notif;
+@end
+#if defined(SOKOL_METAL)
+    @interface _sapp_ios_view : MTKView;
+    @end
+#else
+    @interface _sapp_ios_view : GLKView
+    @end
+#endif
+
+typedef struct {
+    UIWindow* window;
+    _sapp_ios_view* view;
+    UITextField* textfield;
+    _sapp_textfield_dlg* textfield_dlg;
+    #if defined(SOKOL_METAL)
+        UIViewController* view_ctrl;
+        id<MTLDevice> mtl_device;
+    #else
+        GLKViewController* view_ctrl;
+        EAGLContext* eagl_ctx;
+    #endif
+    bool suspended;
+} _sapp_ios_t;
+
+#endif // _SAPP_IOS
+
+#if defined(_SAPP_EMSCRIPTEN)
+
+#if defined(SOKOL_WGPU)
+typedef struct {
+    int state;
+    WGPUDevice device;
+    WGPUSwapChain swapchain;
+    WGPUTextureFormat render_format;
+    WGPUTexture msaa_tex;
+    WGPUTexture depth_stencil_tex;
+    WGPUTextureView swapchain_view;
+    WGPUTextureView msaa_view;
+    WGPUTextureView depth_stencil_view;
+} _sapp_wgpu_t;
+#endif
+
+typedef struct {
+    bool textfield_created;
+    bool wants_show_keyboard;
+    bool wants_hide_keyboard;
+    bool mouse_lock_requested;
+    uint16_t mouse_buttons;
+    #if defined(SOKOL_WGPU)
+    _sapp_wgpu_t wgpu;
+    #endif
+} _sapp_emsc_t;
+#endif // _SAPP_EMSCRIPTEN
+
+#if defined(SOKOL_D3D11) && defined(_SAPP_WIN32)
+typedef struct {
+    ID3D11Device* device;
+    ID3D11DeviceContext* device_context;
+    ID3D11Texture2D* rt;
+    ID3D11RenderTargetView* rtv;
+    ID3D11Texture2D* msaa_rt;
+    ID3D11RenderTargetView* msaa_rtv;
+    ID3D11Texture2D* ds;
+    ID3D11DepthStencilView* dsv;
+    DXGI_SWAP_CHAIN_DESC swap_chain_desc;
+    IDXGISwapChain* swap_chain;
+    IDXGIDevice1* dxgi_device;
+    bool use_dxgi_frame_stats;
+    UINT sync_refresh_count;
+} _sapp_d3d11_t;
+#endif
+
+#if defined(_SAPP_WIN32)
+
+#ifndef DPI_ENUMS_DECLARED
+typedef enum PROCESS_DPI_AWARENESS
+{
+    PROCESS_DPI_UNAWARE = 0,
+    PROCESS_SYSTEM_DPI_AWARE = 1,
+    PROCESS_PER_MONITOR_DPI_AWARE = 2
+} PROCESS_DPI_AWARENESS;
+typedef enum MONITOR_DPI_TYPE {
+    MDT_EFFECTIVE_DPI = 0,
+    MDT_ANGULAR_DPI = 1,
+    MDT_RAW_DPI = 2,
+    MDT_DEFAULT = MDT_EFFECTIVE_DPI
+} MONITOR_DPI_TYPE;
+#endif /*DPI_ENUMS_DECLARED*/
+
+typedef struct {
+    bool aware;
+    float content_scale;
+    float window_scale;
+    float mouse_scale;
+} _sapp_win32_dpi_t;
+
+typedef struct {
+    HWND hwnd;
+    HMONITOR hmonitor;
+    HDC dc;
+    HICON big_icon;
+    HICON small_icon;
+    HCURSOR cursors[_SAPP_MOUSECURSOR_NUM];
+    UINT orig_codepage;
+    LONG mouse_locked_x, mouse_locked_y;
+    RECT stored_window_rect;    // used to restore window pos/size when toggling fullscreen => windowed
+    bool is_win10_or_greater;
+    bool in_create_window;
+    bool iconified;
+    bool mouse_tracked;
+    uint8_t mouse_capture_mask;
+    _sapp_win32_dpi_t dpi;
+    bool raw_input_mousepos_valid;
+    LONG raw_input_mousepos_x;
+    LONG raw_input_mousepos_y;
+    uint8_t raw_input_data[256];
+} _sapp_win32_t;
+
+#if defined(SOKOL_GLCORE33)
+#define WGL_NUMBER_PIXEL_FORMATS_ARB 0x2000
+#define WGL_SUPPORT_OPENGL_ARB 0x2010
+#define WGL_DRAW_TO_WINDOW_ARB 0x2001
+#define WGL_PIXEL_TYPE_ARB 0x2013
+#define WGL_TYPE_RGBA_ARB 0x202b
+#define WGL_ACCELERATION_ARB 0x2003
+#define WGL_NO_ACCELERATION_ARB 0x2025
+#define WGL_RED_BITS_ARB 0x2015
+#define WGL_GREEN_BITS_ARB 0x2017
+#define WGL_BLUE_BITS_ARB 0x2019
+#define WGL_ALPHA_BITS_ARB 0x201b
+#define WGL_DEPTH_BITS_ARB 0x2022
+#define WGL_STENCIL_BITS_ARB 0x2023
+#define WGL_DOUBLE_BUFFER_ARB 0x2011
+#define WGL_SAMPLES_ARB 0x2042
+#define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define WGL_CONTEXT_PROFILE_MASK_ARB 0x9126
+#define WGL_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define WGL_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define WGL_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define WGL_CONTEXT_FLAGS_ARB 0x2094
+#define ERROR_INVALID_VERSION_ARB 0x2095
+#define ERROR_INVALID_PROFILE_ARB 0x2096
+#define ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB 0x2054
+typedef BOOL (WINAPI * PFNWGLSWAPINTERVALEXTPROC)(int);
+typedef BOOL (WINAPI * PFNWGLGETPIXELFORMATATTRIBIVARBPROC)(HDC,int,int,UINT,const int*,int*);
+typedef const char* (WINAPI * PFNWGLGETEXTENSIONSSTRINGEXTPROC)(void);
+typedef const char* (WINAPI * PFNWGLGETEXTENSIONSSTRINGARBPROC)(HDC);
+typedef HGLRC (WINAPI * PFNWGLCREATECONTEXTATTRIBSARBPROC)(HDC,HGLRC,const int*);
+typedef HGLRC (WINAPI * PFN_wglCreateContext)(HDC);
+typedef BOOL (WINAPI * PFN_wglDeleteContext)(HGLRC);
+typedef PROC (WINAPI * PFN_wglGetProcAddress)(LPCSTR);
+typedef HDC (WINAPI * PFN_wglGetCurrentDC)(void);
+typedef BOOL (WINAPI * PFN_wglMakeCurrent)(HDC,HGLRC);
+
+typedef struct {
+    HINSTANCE opengl32;
+    HGLRC gl_ctx;
+    PFN_wglCreateContext CreateContext;
+    PFN_wglDeleteContext DeleteContext;
+    PFN_wglGetProcAddress GetProcAddress;
+    PFN_wglGetCurrentDC GetCurrentDC;
+    PFN_wglMakeCurrent MakeCurrent;
+    PFNWGLSWAPINTERVALEXTPROC SwapIntervalEXT;
+    PFNWGLGETPIXELFORMATATTRIBIVARBPROC GetPixelFormatAttribivARB;
+    PFNWGLGETEXTENSIONSSTRINGEXTPROC GetExtensionsStringEXT;
+    PFNWGLGETEXTENSIONSSTRINGARBPROC GetExtensionsStringARB;
+    PFNWGLCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB;
+    bool ext_swap_control;
+    bool arb_multisample;
+    bool arb_pixel_format;
+    bool arb_create_context;
+    bool arb_create_context_profile;
+    HWND msg_hwnd;
+    HDC msg_dc;
+} _sapp_wgl_t;
+#endif // SOKOL_GLCORE33
+
+#endif // _SAPP_WIN32
+
+#if defined(_SAPP_ANDROID)
+typedef enum {
+    _SOKOL_ANDROID_MSG_CREATE,
+    _SOKOL_ANDROID_MSG_RESUME,
+    _SOKOL_ANDROID_MSG_PAUSE,
+    _SOKOL_ANDROID_MSG_FOCUS,
+    _SOKOL_ANDROID_MSG_NO_FOCUS,
+    _SOKOL_ANDROID_MSG_SET_NATIVE_WINDOW,
+    _SOKOL_ANDROID_MSG_SET_INPUT_QUEUE,
+    _SOKOL_ANDROID_MSG_DESTROY,
+} _sapp_android_msg_t;
+
+typedef struct {
+    pthread_t thread;
+    pthread_mutex_t mutex;
+    pthread_cond_t cond;
+    int read_from_main_fd;
+    int write_from_main_fd;
+} _sapp_android_pt_t;
+
+typedef struct {
+    ANativeWindow* window;
+    AInputQueue* input;
+} _sapp_android_resources_t;
+
+typedef struct {
+    ANativeActivity* activity;
+    _sapp_android_pt_t pt;
+    _sapp_android_resources_t pending;
+    _sapp_android_resources_t current;
+    ALooper* looper;
+    bool is_thread_started;
+    bool is_thread_stopping;
+    bool is_thread_stopped;
+    bool has_created;
+    bool has_resumed;
+    bool has_focus;
+    EGLConfig config;
+    EGLDisplay display;
+    EGLContext context;
+    EGLSurface surface;
+} _sapp_android_t;
+
+#endif // _SAPP_ANDROID
+
+#if defined(_SAPP_LINUX)
+
+#define _SAPP_X11_XDND_VERSION (5)
+
+#define GLX_VENDOR 1
+#define GLX_RGBA_BIT 0x00000001
+#define GLX_WINDOW_BIT 0x00000001
+#define GLX_DRAWABLE_TYPE 0x8010
+#define GLX_RENDER_TYPE	0x8011
+#define GLX_DOUBLEBUFFER 5
+#define GLX_RED_SIZE 8
+#define GLX_GREEN_SIZE 9
+#define GLX_BLUE_SIZE 10
+#define GLX_ALPHA_SIZE 11
+#define GLX_DEPTH_SIZE 12
+#define GLX_STENCIL_SIZE 13
+#define GLX_SAMPLES 0x186a1
+#define GLX_CONTEXT_CORE_PROFILE_BIT_ARB 0x00000001
+#define GLX_CONTEXT_PROFILE_MASK_ARB 0x9126
+#define GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB 0x00000002
+#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
+#define GLX_CONTEXT_FLAGS_ARB 0x2094
+
+typedef XID GLXWindow;
+typedef XID GLXDrawable;
+typedef struct __GLXFBConfig* GLXFBConfig;
+typedef struct __GLXcontext* GLXContext;
+typedef void (*__GLXextproc)(void);
+
+typedef int (*PFNGLXGETFBCONFIGATTRIBPROC)(Display*,GLXFBConfig,int,int*);
+typedef const char* (*PFNGLXGETCLIENTSTRINGPROC)(Display*,int);
+typedef Bool (*PFNGLXQUERYEXTENSIONPROC)(Display*,int*,int*);
+typedef Bool (*PFNGLXQUERYVERSIONPROC)(Display*,int*,int*);
+typedef void (*PFNGLXDESTROYCONTEXTPROC)(Display*,GLXContext);
+typedef Bool (*PFNGLXMAKECURRENTPROC)(Display*,GLXDrawable,GLXContext);
+typedef void (*PFNGLXSWAPBUFFERSPROC)(Display*,GLXDrawable);
+typedef const char* (*PFNGLXQUERYEXTENSIONSSTRINGPROC)(Display*,int);
+typedef GLXFBConfig* (*PFNGLXGETFBCONFIGSPROC)(Display*,int,int*);
+typedef __GLXextproc (* PFNGLXGETPROCADDRESSPROC)(const char *procName);
+typedef void (*PFNGLXSWAPINTERVALEXTPROC)(Display*,GLXDrawable,int);
+typedef XVisualInfo* (*PFNGLXGETVISUALFROMFBCONFIGPROC)(Display*,GLXFBConfig);
+typedef GLXWindow (*PFNGLXCREATEWINDOWPROC)(Display*,GLXFBConfig,Window,const int*);
+typedef void (*PFNGLXDESTROYWINDOWPROC)(Display*,GLXWindow);
+
+typedef int (*PFNGLXSWAPINTERVALMESAPROC)(int);
+typedef GLXContext (*PFNGLXCREATECONTEXTATTRIBSARBPROC)(Display*,GLXFBConfig,GLXContext,Bool,const int*);
+
+typedef struct {
+    bool available;
+    int major_opcode;
+    int event_base;
+    int error_base;
+    int major;
+    int minor;
+} _sapp_xi_t;
+
+typedef struct {
+    int version;
+    Window source;
+    Atom format;
+    Atom XdndAware;
+    Atom XdndEnter;
+    Atom XdndPosition;
+    Atom XdndStatus;
+    Atom XdndActionCopy;
+    Atom XdndDrop;
+    Atom XdndFinished;
+    Atom XdndSelection;
+    Atom XdndTypeList;
+    Atom text_uri_list;
+} _sapp_xdnd_t;
+
+typedef struct {
+    uint8_t mouse_buttons;
+    Display* display;
+    int screen;
+    Window root;
+    Colormap colormap;
+    Window window;
+    Cursor hidden_cursor;
+    Cursor cursors[_SAPP_MOUSECURSOR_NUM];
+    int window_state;
+    float dpi;
+    unsigned char error_code;
+    Atom UTF8_STRING;
+    Atom WM_PROTOCOLS;
+    Atom WM_DELETE_WINDOW;
+    Atom WM_STATE;
+    Atom NET_WM_NAME;
+    Atom NET_WM_ICON_NAME;
+    Atom NET_WM_ICON;
+    Atom NET_WM_STATE;
+    Atom NET_WM_STATE_FULLSCREEN;
+    _sapp_xi_t xi;
+    _sapp_xdnd_t xdnd;
+} _sapp_x11_t;
+
+#if defined(_SAPP_GLX)
+
+typedef struct {
+    void* libgl;
+    int major;
+    int minor;
+    int event_base;
+    int error_base;
+    GLXContext ctx;
+    GLXWindow window;
+
+    // GLX 1.3 functions
+    PFNGLXGETFBCONFIGSPROC GetFBConfigs;
+    PFNGLXGETFBCONFIGATTRIBPROC GetFBConfigAttrib;
+    PFNGLXGETCLIENTSTRINGPROC GetClientString;
+    PFNGLXQUERYEXTENSIONPROC QueryExtension;
+    PFNGLXQUERYVERSIONPROC QueryVersion;
+    PFNGLXDESTROYCONTEXTPROC DestroyContext;
+    PFNGLXMAKECURRENTPROC MakeCurrent;
+    PFNGLXSWAPBUFFERSPROC SwapBuffers;
+    PFNGLXQUERYEXTENSIONSSTRINGPROC QueryExtensionsString;
+    PFNGLXGETVISUALFROMFBCONFIGPROC GetVisualFromFBConfig;
+    PFNGLXCREATEWINDOWPROC CreateWindow;
+    PFNGLXDESTROYWINDOWPROC DestroyWindow;
+
+    // GLX 1.4 and extension functions
+    PFNGLXGETPROCADDRESSPROC GetProcAddress;
+    PFNGLXGETPROCADDRESSPROC GetProcAddressARB;
+    PFNGLXSWAPINTERVALEXTPROC SwapIntervalEXT;
+    PFNGLXSWAPINTERVALMESAPROC SwapIntervalMESA;
+    PFNGLXCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB;
+
+    // extension availability
+    bool EXT_swap_control;
+    bool MESA_swap_control;
+    bool ARB_multisample;
+    bool ARB_create_context;
+    bool ARB_create_context_profile;
+} _sapp_glx_t;
+
+#else
+
+typedef struct {
+    EGLDisplay display;
+    EGLContext context;
+    EGLSurface surface;
+} _sapp_egl_t;
+
+#endif // _SAPP_GLX
+
+#endif // _SAPP_LINUX
+
+/* helper macros */
+#define _sapp_def(val, def) (((val) == 0) ? (def) : (val))
+#define _sapp_absf(a) (((a)<0.0f)?-(a):(a))
+
+#define _SAPP_MAX_TITLE_LENGTH (128)
+#define _SAPP_FALLBACK_DEFAULT_WINDOW_WIDTH (640)
+#define _SAPP_FALLBACK_DEFAULT_WINDOW_HEIGHT (480)
+/* NOTE: the pixel format values *must* be compatible with sg_pixel_format */
+#define _SAPP_PIXELFORMAT_RGBA8 (23)
+#define _SAPP_PIXELFORMAT_BGRA8 (28)
+#define _SAPP_PIXELFORMAT_DEPTH (42)
+#define _SAPP_PIXELFORMAT_DEPTH_STENCIL (43)
+
+#if defined(_SAPP_MACOS) || defined(_SAPP_IOS)
+    // this is ARC compatible
+    #if defined(__cplusplus)
+        #define _SAPP_CLEAR_ARC_STRUCT(type, item) { item = type(); }
+    #else
+        #define _SAPP_CLEAR_ARC_STRUCT(type, item) { item = (type) { 0 }; }
+    #endif
+#else
+    #define _SAPP_CLEAR_ARC_STRUCT(type, item) { _sapp_clear(&item, sizeof(item)); }
+#endif
+
+typedef struct {
+    bool enabled;
+    int buf_size;
+    char* buffer;
+} _sapp_clipboard_t;
+
+typedef struct {
+    bool enabled;
+    int max_files;
+    int max_path_length;
+    int num_files;
+    int buf_size;
+    char* buffer;
+} _sapp_drop_t;
+
+typedef struct {
+    float x, y;
+    float dx, dy;
+    bool shown;
+    bool locked;
+    bool pos_valid;
+    sapp_mouse_cursor current_cursor;
+} _sapp_mouse_t;
+
+typedef struct {
+    sapp_desc desc;
+    bool valid;
+    bool fullscreen;
+    bool first_frame;
+    bool init_called;
+    bool cleanup_called;
+    bool quit_requested;
+    bool quit_ordered;
+    bool event_consumed;
+    bool html5_ask_leave_site;
+    bool onscreen_keyboard_shown;
+    int window_width;
+    int window_height;
+    int framebuffer_width;
+    int framebuffer_height;
+    int sample_count;
+    int swap_interval;
+    float dpi_scale;
+    uint64_t frame_count;
+    _sapp_timing_t timing;
+    sapp_event event;
+    _sapp_mouse_t mouse;
+    _sapp_clipboard_t clipboard;
+    _sapp_drop_t drop;
+    sapp_icon_desc default_icon_desc;
+    uint32_t* default_icon_pixels;
+    #if defined(_SAPP_MACOS)
+        _sapp_macos_t macos;
+    #elif defined(_SAPP_IOS)
+        _sapp_ios_t ios;
+    #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_t emsc;
+    #elif defined(_SAPP_WIN32)
+        _sapp_win32_t win32;
+        #if defined(SOKOL_D3D11)
+            _sapp_d3d11_t d3d11;
+        #elif defined(SOKOL_GLCORE33)
+            _sapp_wgl_t wgl;
+        #endif
+    #elif defined(_SAPP_ANDROID)
+        _sapp_android_t android;
+    #elif defined(_SAPP_LINUX)
+        _sapp_x11_t x11;
+        #if defined(_SAPP_GLX)
+            _sapp_glx_t glx;
+        #else
+            _sapp_egl_t egl;
+        #endif
+    #endif
+    char html5_canvas_selector[_SAPP_MAX_TITLE_LENGTH];
+    char window_title[_SAPP_MAX_TITLE_LENGTH];      /* UTF-8 */
+    wchar_t window_title_wide[_SAPP_MAX_TITLE_LENGTH];   /* UTF-32 or UCS-2 */
+    sapp_keycode keycodes[SAPP_MAX_KEYCODES];
+} _sapp_t;
+static _sapp_t _sapp;
+
+// ██       ██████   ██████   ██████  ██ ███    ██  ██████
+// ██      ██    ██ ██       ██       ██ ████   ██ ██
+// ██      ██    ██ ██   ███ ██   ███ ██ ██ ██  ██ ██   ███
+// ██      ██    ██ ██    ██ ██    ██ ██ ██  ██ ██ ██    ██
+// ███████  ██████   ██████   ██████  ██ ██   ████  ██████
+//
+// >>logging
+#if defined(SOKOL_DEBUG)
+#define _SAPP_LOGITEM_XMACRO(item,msg) #item ": " msg,
+static const char* _sapp_log_messages[] = {
+    _SAPP_LOG_ITEMS
+};
+#undef _SAPP_LOGITEM_XMACRO
+#endif // SOKOL_DEBUG
+
+#define _SAPP_PANIC(code) _sapp_log(SAPP_LOGITEM_ ##code, 0, 0, __LINE__)
+#define _SAPP_ERROR(code) _sapp_log(SAPP_LOGITEM_ ##code, 1, 0, __LINE__)
+#define _SAPP_WARN(code) _sapp_log(SAPP_LOGITEM_ ##code, 2, 0, __LINE__)
+#define _SAPP_INFO(code) _sapp_log(SAPP_LOGITEM_ ##code, 3, 0, __LINE__)
+
+static void _sapp_log(sapp_log_item log_item, uint32_t log_level, const char* msg, uint32_t line_nr) {
+    if (_sapp.desc.logger.func) {
+        const char* filename = 0;
+        #if defined(SOKOL_DEBUG)
+            filename = __FILE__;
+            if (0 == msg) {
+                msg = _sapp_log_messages[log_item];
+            }
+        #endif
+        _sapp.desc.logger.func("sapp", log_level, log_item, msg, line_nr, filename, _sapp.desc.logger.user_data);
+    }
+    else {
+        // for log level PANIC it would be 'undefined behaviour' to continue
+        if (log_level == 0) {
+            abort();
+        }
+    }
+}
+
+// ███    ███ ███████ ███    ███  ██████  ██████  ██    ██
+// ████  ████ ██      ████  ████ ██    ██ ██   ██  ██  ██
+// ██ ████ ██ █████   ██ ████ ██ ██    ██ ██████    ████
+// ██  ██  ██ ██      ██  ██  ██ ██    ██ ██   ██    ██
+// ██      ██ ███████ ██      ██  ██████  ██   ██    ██
+//
+// >>memory
+_SOKOL_PRIVATE void _sapp_clear(void* ptr, size_t size) {
+    SOKOL_ASSERT(ptr && (size > 0));
+    memset(ptr, 0, size);
+}
+
+_SOKOL_PRIVATE void* _sapp_malloc(size_t size) {
+    SOKOL_ASSERT(size > 0);
+    void* ptr;
+    if (_sapp.desc.allocator.alloc) {
+        ptr = _sapp.desc.allocator.alloc(size, _sapp.desc.allocator.user_data);
+    }
+    else {
+        ptr = malloc(size);
+    }
+    if (0 == ptr) {
+        _SAPP_PANIC(MALLOC_FAILED);
+    }
+    return ptr;
+}
+
+_SOKOL_PRIVATE void* _sapp_malloc_clear(size_t size) {
+    void* ptr = _sapp_malloc(size);
+    _sapp_clear(ptr, size);
+    return ptr;
+}
+
+_SOKOL_PRIVATE void _sapp_free(void* ptr) {
+    if (_sapp.desc.allocator.free) {
+        _sapp.desc.allocator.free(ptr, _sapp.desc.allocator.user_data);
+    }
+    else {
+        free(ptr);
+    }
+}
+
+// ██   ██ ███████ ██      ██████  ███████ ██████  ███████
+// ██   ██ ██      ██      ██   ██ ██      ██   ██ ██
+// ███████ █████   ██      ██████  █████   ██████  ███████
+// ██   ██ ██      ██      ██      ██      ██   ██      ██
+// ██   ██ ███████ ███████ ██      ███████ ██   ██ ███████
+//
+// >>helpers
+_SOKOL_PRIVATE void _sapp_call_init(void) {
+    if (_sapp.desc.init_cb) {
+        _sapp.desc.init_cb();
+    }
+    else if (_sapp.desc.init_userdata_cb) {
+        _sapp.desc.init_userdata_cb(_sapp.desc.user_data);
+    }
+    _sapp.init_called = true;
+}
+
+_SOKOL_PRIVATE void _sapp_call_frame(void) {
+    if (_sapp.init_called && !_sapp.cleanup_called) {
+        if (_sapp.desc.frame_cb) {
+            _sapp.desc.frame_cb();
+        }
+        else if (_sapp.desc.frame_userdata_cb) {
+            _sapp.desc.frame_userdata_cb(_sapp.desc.user_data);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_call_cleanup(void) {
+    if (!_sapp.cleanup_called) {
+        if (_sapp.desc.cleanup_cb) {
+            _sapp.desc.cleanup_cb();
+        }
+        else if (_sapp.desc.cleanup_userdata_cb) {
+            _sapp.desc.cleanup_userdata_cb(_sapp.desc.user_data);
+        }
+        _sapp.cleanup_called = true;
+    }
+}
+
+_SOKOL_PRIVATE bool _sapp_call_event(const sapp_event* e) {
+    if (!_sapp.cleanup_called) {
+        if (_sapp.desc.event_cb) {
+            _sapp.desc.event_cb(e);
+        }
+        else if (_sapp.desc.event_userdata_cb) {
+            _sapp.desc.event_userdata_cb(e, _sapp.desc.user_data);
+        }
+    }
+    if (_sapp.event_consumed) {
+        _sapp.event_consumed = false;
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+_SOKOL_PRIVATE char* _sapp_dropped_file_path_ptr(int index) {
+    SOKOL_ASSERT(_sapp.drop.buffer);
+    SOKOL_ASSERT((index >= 0) && (index <= _sapp.drop.max_files));
+    int offset = index * _sapp.drop.max_path_length;
+    SOKOL_ASSERT(offset < _sapp.drop.buf_size);
+    return &_sapp.drop.buffer[offset];
+}
+
+/* Copy a string into a fixed size buffer with guaranteed zero-
+   termination.
+
+   Return false if the string didn't fit into the buffer and had to be clamped.
+
+   FIXME: Currently UTF-8 strings might become invalid if the string
+   is clamped, because the last zero-byte might be written into
+   the middle of a multi-byte sequence.
+*/
+_SOKOL_PRIVATE bool _sapp_strcpy(const char* src, char* dst, int max_len) {
+    SOKOL_ASSERT(src && dst && (max_len > 0));
+    char* const end = &(dst[max_len-1]);
+    char c = 0;
+    for (int i = 0; i < max_len; i++) {
+        c = *src;
+        if (c != 0) {
+            src++;
+        }
+        *dst++ = c;
+    }
+    /* truncated? */
+    if (c != 0) {
+        *end = 0;
+        return false;
+    }
+    else {
+        return true;
+    }
+}
+
+_SOKOL_PRIVATE sapp_desc _sapp_desc_defaults(const sapp_desc* desc) {
+    SOKOL_ASSERT((desc->allocator.alloc && desc->allocator.free) || (!desc->allocator.alloc && !desc->allocator.free));
+    sapp_desc res = *desc;
+    res.sample_count = _sapp_def(res.sample_count, 1);
+    res.swap_interval = _sapp_def(res.swap_interval, 1);
+    // NOTE: can't patch the default for gl_major_version and gl_minor_version
+    // independently, because a desired version 4.0 would be patched to 4.2
+    // (or expressed differently: zero is a valid value for gl_minor_version
+    // and can't be used to indicate 'default')
+    if (0 == res.gl_major_version) {
+        res.gl_major_version = 3;
+        res.gl_minor_version = 2;
+    }
+    res.html5_canvas_name = _sapp_def(res.html5_canvas_name, "canvas");
+    res.clipboard_size = _sapp_def(res.clipboard_size, 8192);
+    res.max_dropped_files = _sapp_def(res.max_dropped_files, 1);
+    res.max_dropped_file_path_length = _sapp_def(res.max_dropped_file_path_length, 2048);
+    res.window_title = _sapp_def(res.window_title, "sokol_app");
+    return res;
+}
+
+_SOKOL_PRIVATE void _sapp_init_state(const sapp_desc* desc) {
+    SOKOL_ASSERT(desc);
+    SOKOL_ASSERT(desc->width >= 0);
+    SOKOL_ASSERT(desc->height >= 0);
+    SOKOL_ASSERT(desc->sample_count >= 0);
+    SOKOL_ASSERT(desc->swap_interval >= 0);
+    SOKOL_ASSERT(desc->clipboard_size >= 0);
+    SOKOL_ASSERT(desc->max_dropped_files >= 0);
+    SOKOL_ASSERT(desc->max_dropped_file_path_length >= 0);
+    _SAPP_CLEAR_ARC_STRUCT(_sapp_t, _sapp);
+    _sapp.desc = _sapp_desc_defaults(desc);
+    _sapp.first_frame = true;
+    // NOTE: _sapp.desc.width/height may be 0! Platform backends need to deal with this
+    _sapp.window_width = _sapp.desc.width;
+    _sapp.window_height = _sapp.desc.height;
+    _sapp.framebuffer_width = _sapp.window_width;
+    _sapp.framebuffer_height = _sapp.window_height;
+    _sapp.sample_count = _sapp.desc.sample_count;
+    _sapp.swap_interval = _sapp.desc.swap_interval;
+    _sapp.html5_canvas_selector[0] = '#';
+    _sapp_strcpy(_sapp.desc.html5_canvas_name, &_sapp.html5_canvas_selector[1], sizeof(_sapp.html5_canvas_selector) - 1);
+    _sapp.desc.html5_canvas_name = &_sapp.html5_canvas_selector[1];
+    _sapp.html5_ask_leave_site = _sapp.desc.html5_ask_leave_site;
+    _sapp.clipboard.enabled = _sapp.desc.enable_clipboard;
+    if (_sapp.clipboard.enabled) {
+        _sapp.clipboard.buf_size = _sapp.desc.clipboard_size;
+        _sapp.clipboard.buffer = (char*) _sapp_malloc_clear((size_t)_sapp.clipboard.buf_size);
+    }
+    _sapp.drop.enabled = _sapp.desc.enable_dragndrop;
+    if (_sapp.drop.enabled) {
+        _sapp.drop.max_files = _sapp.desc.max_dropped_files;
+        _sapp.drop.max_path_length = _sapp.desc.max_dropped_file_path_length;
+        _sapp.drop.buf_size = _sapp.drop.max_files * _sapp.drop.max_path_length;
+        _sapp.drop.buffer = (char*) _sapp_malloc_clear((size_t)_sapp.drop.buf_size);
+    }
+    _sapp_strcpy(_sapp.desc.window_title, _sapp.window_title, sizeof(_sapp.window_title));
+    _sapp.desc.window_title = _sapp.window_title;
+    _sapp.dpi_scale = 1.0f;
+    _sapp.fullscreen = _sapp.desc.fullscreen;
+    _sapp.mouse.shown = true;
+    _sapp_timing_init(&_sapp.timing);
+}
+
+_SOKOL_PRIVATE void _sapp_discard_state(void) {
+    if (_sapp.clipboard.enabled) {
+        SOKOL_ASSERT(_sapp.clipboard.buffer);
+        _sapp_free((void*)_sapp.clipboard.buffer);
+    }
+    if (_sapp.drop.enabled) {
+        SOKOL_ASSERT(_sapp.drop.buffer);
+        _sapp_free((void*)_sapp.drop.buffer);
+    }
+    if (_sapp.default_icon_pixels) {
+        _sapp_free((void*)_sapp.default_icon_pixels);
+    }
+    _SAPP_CLEAR_ARC_STRUCT(_sapp_t, _sapp);
+}
+
+_SOKOL_PRIVATE void _sapp_init_event(sapp_event_type type) {
+    _sapp_clear(&_sapp.event, sizeof(_sapp.event));
+    _sapp.event.type = type;
+    _sapp.event.frame_count = _sapp.frame_count;
+    _sapp.event.mouse_button = SAPP_MOUSEBUTTON_INVALID;
+    _sapp.event.window_width = _sapp.window_width;
+    _sapp.event.window_height = _sapp.window_height;
+    _sapp.event.framebuffer_width = _sapp.framebuffer_width;
+    _sapp.event.framebuffer_height = _sapp.framebuffer_height;
+    _sapp.event.mouse_x = _sapp.mouse.x;
+    _sapp.event.mouse_y = _sapp.mouse.y;
+    _sapp.event.mouse_dx = _sapp.mouse.dx;
+    _sapp.event.mouse_dy = _sapp.mouse.dy;
+}
+
+_SOKOL_PRIVATE bool _sapp_events_enabled(void) {
+    /* only send events when an event callback is set, and the init function was called */
+    return (_sapp.desc.event_cb || _sapp.desc.event_userdata_cb) && _sapp.init_called;
+}
+
+_SOKOL_PRIVATE sapp_keycode _sapp_translate_key(int scan_code) {
+    if ((scan_code >= 0) && (scan_code < SAPP_MAX_KEYCODES)) {
+        return _sapp.keycodes[scan_code];
+    }
+    else {
+        return SAPP_KEYCODE_INVALID;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_clear_drop_buffer(void) {
+    if (_sapp.drop.enabled) {
+        SOKOL_ASSERT(_sapp.drop.buffer);
+        _sapp_clear(_sapp.drop.buffer, (size_t)_sapp.drop.buf_size);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_frame(void) {
+    if (_sapp.first_frame) {
+        _sapp.first_frame = false;
+        _sapp_call_init();
+    }
+    _sapp_call_frame();
+    _sapp.frame_count++;
+}
+
+_SOKOL_PRIVATE bool _sapp_image_validate(const sapp_image_desc* desc) {
+    SOKOL_ASSERT(desc->width > 0);
+    SOKOL_ASSERT(desc->height > 0);
+    SOKOL_ASSERT(desc->pixels.ptr != 0);
+    SOKOL_ASSERT(desc->pixels.size > 0);
+    const size_t wh_size = (size_t)(desc->width * desc->height) * sizeof(uint32_t);
+    if (wh_size != desc->pixels.size) {
+        _SAPP_ERROR(IMAGE_DATA_SIZE_MISMATCH);
+        return false;
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE int _sapp_image_bestmatch(const sapp_image_desc image_descs[], int num_images, int width, int height) {
+    int least_diff = 0x7FFFFFFF;
+    int least_index = 0;
+    for (int i = 0; i < num_images; i++) {
+        int diff = (image_descs[i].width * image_descs[i].height) - (width * height);
+        if (diff < 0) {
+            diff = -diff;
+        }
+        if (diff < least_diff) {
+            least_diff = diff;
+            least_index = i;
+        }
+    }
+    return least_index;
+}
+
+_SOKOL_PRIVATE int _sapp_icon_num_images(const sapp_icon_desc* desc) {
+    int index = 0;
+    for (; index < SAPP_MAX_ICONIMAGES; index++) {
+        if (0 == desc->images[index].pixels.ptr) {
+            break;
+        }
+    }
+    return index;
+}
+
+_SOKOL_PRIVATE bool _sapp_validate_icon_desc(const sapp_icon_desc* desc, int num_images) {
+    SOKOL_ASSERT(num_images <= SAPP_MAX_ICONIMAGES);
+    for (int i = 0; i < num_images; i++) {
+        const sapp_image_desc* img_desc = &desc->images[i];
+        if (!_sapp_image_validate(img_desc)) {
+            return false;
+        }
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE void _sapp_setup_default_icon(void) {
+    SOKOL_ASSERT(0 == _sapp.default_icon_pixels);
+
+    const int num_icons = 3;
+    const int icon_sizes[3] = { 16, 32, 64 };   // must be multiple of 8!
+
+    // allocate a pixel buffer for all icon pixels
+    int all_num_pixels = 0;
+    for (int i = 0; i < num_icons; i++) {
+        all_num_pixels += icon_sizes[i] * icon_sizes[i];
+    }
+    _sapp.default_icon_pixels = (uint32_t*) _sapp_malloc_clear((size_t)all_num_pixels * sizeof(uint32_t));
+
+    // initialize default_icon_desc struct
+    uint32_t* dst = _sapp.default_icon_pixels;
+    const uint32_t* dst_end = dst + all_num_pixels;
+    (void)dst_end; // silence unused warning in release mode
+    for (int i = 0; i < num_icons; i++) {
+        const int dim = (int) icon_sizes[i];
+        const int num_pixels = dim * dim;
+        sapp_image_desc* img_desc = &_sapp.default_icon_desc.images[i];
+        img_desc->width = dim;
+        img_desc->height = dim;
+        img_desc->pixels.ptr = dst;
+        img_desc->pixels.size = (size_t)num_pixels * sizeof(uint32_t);
+        dst += num_pixels;
+    }
+    SOKOL_ASSERT(dst == dst_end);
+
+    // Amstrad CPC font 'S'
+    const uint8_t tile[8] = {
+        0x3C,
+        0x66,
+        0x60,
+        0x3C,
+        0x06,
+        0x66,
+        0x3C,
+        0x00,
+    };
+    // rainbow colors
+    const uint32_t colors[8] = {
+        0xFF4370FF,
+        0xFF26A7FF,
+        0xFF58EEFF,
+        0xFF57E1D4,
+        0xFF65CC9C,
+        0xFF6ABB66,
+        0xFFF5A542,
+        0xFFC2577E,
+    };
+    dst = _sapp.default_icon_pixels;
+    const uint32_t blank = 0x00FFFFFF;
+    const uint32_t shadow = 0xFF000000;
+    for (int i = 0; i < num_icons; i++) {
+        const int dim = icon_sizes[i];
+        SOKOL_ASSERT((dim % 8) == 0);
+        const int scale = dim / 8;
+        for (int ty = 0, y = 0; ty < 8; ty++) {
+            const uint32_t color = colors[ty];
+            for (int sy = 0; sy < scale; sy++, y++) {
+                uint8_t bits = tile[ty];
+                for (int tx = 0, x = 0; tx < 8; tx++, bits<<=1) {
+                    uint32_t pixel = (0 == (bits & 0x80)) ? blank : color;
+                    for (int sx = 0; sx < scale; sx++, x++) {
+                        SOKOL_ASSERT(dst < dst_end);
+                        *dst++ = pixel;
+                    }
+                }
+            }
+        }
+    }
+    SOKOL_ASSERT(dst == dst_end);
+
+    // right shadow
+    dst = _sapp.default_icon_pixels;
+    for (int i = 0; i < num_icons; i++) {
+        const int dim = icon_sizes[i];
+        for (int y = 0; y < dim; y++) {
+            uint32_t prev_color = blank;
+            for (int x = 0; x < dim; x++) {
+                const int dst_index = y * dim + x;
+                const uint32_t cur_color = dst[dst_index];
+                if ((cur_color == blank) && (prev_color != blank)) {
+                    dst[dst_index] = shadow;
+                }
+                prev_color = cur_color;
+            }
+        }
+        dst += dim * dim;
+    }
+    SOKOL_ASSERT(dst == dst_end);
+
+    // bottom shadow
+    dst = _sapp.default_icon_pixels;
+    for (int i = 0; i < num_icons; i++) {
+        const int dim = icon_sizes[i];
+        for (int x = 0; x < dim; x++) {
+            uint32_t prev_color = blank;
+            for (int y = 0; y < dim; y++) {
+                const int dst_index = y * dim + x;
+                const uint32_t cur_color = dst[dst_index];
+                if ((cur_color == blank) && (prev_color != blank)) {
+                    dst[dst_index] = shadow;
+                }
+                prev_color = cur_color;
+            }
+        }
+        dst += dim * dim;
+    }
+    SOKOL_ASSERT(dst == dst_end);
+}
+
+//  █████  ██████  ██████  ██      ███████
+// ██   ██ ██   ██ ██   ██ ██      ██
+// ███████ ██████  ██████  ██      █████
+// ██   ██ ██      ██      ██      ██
+// ██   ██ ██      ██      ███████ ███████
+//
+// >>apple
+#if defined(_SAPP_APPLE)
+
+#if __has_feature(objc_arc)
+#define _SAPP_OBJC_RELEASE(obj) { obj = nil; }
+#else
+#define _SAPP_OBJC_RELEASE(obj) { [obj release]; obj = nil; }
+#endif
+
+// ███    ███  █████   ██████  ██████  ███████
+// ████  ████ ██   ██ ██      ██    ██ ██
+// ██ ████ ██ ███████ ██      ██    ██ ███████
+// ██  ██  ██ ██   ██ ██      ██    ██      ██
+// ██      ██ ██   ██  ██████  ██████  ███████
+//
+// >>macos
+#if defined(_SAPP_MACOS)
+
+_SOKOL_PRIVATE void _sapp_macos_init_keytable(void) {
+    _sapp.keycodes[0x1D] = SAPP_KEYCODE_0;
+    _sapp.keycodes[0x12] = SAPP_KEYCODE_1;
+    _sapp.keycodes[0x13] = SAPP_KEYCODE_2;
+    _sapp.keycodes[0x14] = SAPP_KEYCODE_3;
+    _sapp.keycodes[0x15] = SAPP_KEYCODE_4;
+    _sapp.keycodes[0x17] = SAPP_KEYCODE_5;
+    _sapp.keycodes[0x16] = SAPP_KEYCODE_6;
+    _sapp.keycodes[0x1A] = SAPP_KEYCODE_7;
+    _sapp.keycodes[0x1C] = SAPP_KEYCODE_8;
+    _sapp.keycodes[0x19] = SAPP_KEYCODE_9;
+    _sapp.keycodes[0x00] = SAPP_KEYCODE_A;
+    _sapp.keycodes[0x0B] = SAPP_KEYCODE_B;
+    _sapp.keycodes[0x08] = SAPP_KEYCODE_C;
+    _sapp.keycodes[0x02] = SAPP_KEYCODE_D;
+    _sapp.keycodes[0x0E] = SAPP_KEYCODE_E;
+    _sapp.keycodes[0x03] = SAPP_KEYCODE_F;
+    _sapp.keycodes[0x05] = SAPP_KEYCODE_G;
+    _sapp.keycodes[0x04] = SAPP_KEYCODE_H;
+    _sapp.keycodes[0x22] = SAPP_KEYCODE_I;
+    _sapp.keycodes[0x26] = SAPP_KEYCODE_J;
+    _sapp.keycodes[0x28] = SAPP_KEYCODE_K;
+    _sapp.keycodes[0x25] = SAPP_KEYCODE_L;
+    _sapp.keycodes[0x2E] = SAPP_KEYCODE_M;
+    _sapp.keycodes[0x2D] = SAPP_KEYCODE_N;
+    _sapp.keycodes[0x1F] = SAPP_KEYCODE_O;
+    _sapp.keycodes[0x23] = SAPP_KEYCODE_P;
+    _sapp.keycodes[0x0C] = SAPP_KEYCODE_Q;
+    _sapp.keycodes[0x0F] = SAPP_KEYCODE_R;
+    _sapp.keycodes[0x01] = SAPP_KEYCODE_S;
+    _sapp.keycodes[0x11] = SAPP_KEYCODE_T;
+    _sapp.keycodes[0x20] = SAPP_KEYCODE_U;
+    _sapp.keycodes[0x09] = SAPP_KEYCODE_V;
+    _sapp.keycodes[0x0D] = SAPP_KEYCODE_W;
+    _sapp.keycodes[0x07] = SAPP_KEYCODE_X;
+    _sapp.keycodes[0x10] = SAPP_KEYCODE_Y;
+    _sapp.keycodes[0x06] = SAPP_KEYCODE_Z;
+    _sapp.keycodes[0x27] = SAPP_KEYCODE_APOSTROPHE;
+    _sapp.keycodes[0x2A] = SAPP_KEYCODE_BACKSLASH;
+    _sapp.keycodes[0x2B] = SAPP_KEYCODE_COMMA;
+    _sapp.keycodes[0x18] = SAPP_KEYCODE_EQUAL;
+    _sapp.keycodes[0x32] = SAPP_KEYCODE_GRAVE_ACCENT;
+    _sapp.keycodes[0x21] = SAPP_KEYCODE_LEFT_BRACKET;
+    _sapp.keycodes[0x1B] = SAPP_KEYCODE_MINUS;
+    _sapp.keycodes[0x2F] = SAPP_KEYCODE_PERIOD;
+    _sapp.keycodes[0x1E] = SAPP_KEYCODE_RIGHT_BRACKET;
+    _sapp.keycodes[0x29] = SAPP_KEYCODE_SEMICOLON;
+    _sapp.keycodes[0x2C] = SAPP_KEYCODE_SLASH;
+    _sapp.keycodes[0x0A] = SAPP_KEYCODE_WORLD_1;
+    _sapp.keycodes[0x33] = SAPP_KEYCODE_BACKSPACE;
+    _sapp.keycodes[0x39] = SAPP_KEYCODE_CAPS_LOCK;
+    _sapp.keycodes[0x75] = SAPP_KEYCODE_DELETE;
+    _sapp.keycodes[0x7D] = SAPP_KEYCODE_DOWN;
+    _sapp.keycodes[0x77] = SAPP_KEYCODE_END;
+    _sapp.keycodes[0x24] = SAPP_KEYCODE_ENTER;
+    _sapp.keycodes[0x35] = SAPP_KEYCODE_ESCAPE;
+    _sapp.keycodes[0x7A] = SAPP_KEYCODE_F1;
+    _sapp.keycodes[0x78] = SAPP_KEYCODE_F2;
+    _sapp.keycodes[0x63] = SAPP_KEYCODE_F3;
+    _sapp.keycodes[0x76] = SAPP_KEYCODE_F4;
+    _sapp.keycodes[0x60] = SAPP_KEYCODE_F5;
+    _sapp.keycodes[0x61] = SAPP_KEYCODE_F6;
+    _sapp.keycodes[0x62] = SAPP_KEYCODE_F7;
+    _sapp.keycodes[0x64] = SAPP_KEYCODE_F8;
+    _sapp.keycodes[0x65] = SAPP_KEYCODE_F9;
+    _sapp.keycodes[0x6D] = SAPP_KEYCODE_F10;
+    _sapp.keycodes[0x67] = SAPP_KEYCODE_F11;
+    _sapp.keycodes[0x6F] = SAPP_KEYCODE_F12;
+    _sapp.keycodes[0x69] = SAPP_KEYCODE_F13;
+    _sapp.keycodes[0x6B] = SAPP_KEYCODE_F14;
+    _sapp.keycodes[0x71] = SAPP_KEYCODE_F15;
+    _sapp.keycodes[0x6A] = SAPP_KEYCODE_F16;
+    _sapp.keycodes[0x40] = SAPP_KEYCODE_F17;
+    _sapp.keycodes[0x4F] = SAPP_KEYCODE_F18;
+    _sapp.keycodes[0x50] = SAPP_KEYCODE_F19;
+    _sapp.keycodes[0x5A] = SAPP_KEYCODE_F20;
+    _sapp.keycodes[0x73] = SAPP_KEYCODE_HOME;
+    _sapp.keycodes[0x72] = SAPP_KEYCODE_INSERT;
+    _sapp.keycodes[0x7B] = SAPP_KEYCODE_LEFT;
+    _sapp.keycodes[0x3A] = SAPP_KEYCODE_LEFT_ALT;
+    _sapp.keycodes[0x3B] = SAPP_KEYCODE_LEFT_CONTROL;
+    _sapp.keycodes[0x38] = SAPP_KEYCODE_LEFT_SHIFT;
+    _sapp.keycodes[0x37] = SAPP_KEYCODE_LEFT_SUPER;
+    _sapp.keycodes[0x6E] = SAPP_KEYCODE_MENU;
+    _sapp.keycodes[0x47] = SAPP_KEYCODE_NUM_LOCK;
+    _sapp.keycodes[0x79] = SAPP_KEYCODE_PAGE_DOWN;
+    _sapp.keycodes[0x74] = SAPP_KEYCODE_PAGE_UP;
+    _sapp.keycodes[0x7C] = SAPP_KEYCODE_RIGHT;
+    _sapp.keycodes[0x3D] = SAPP_KEYCODE_RIGHT_ALT;
+    _sapp.keycodes[0x3E] = SAPP_KEYCODE_RIGHT_CONTROL;
+    _sapp.keycodes[0x3C] = SAPP_KEYCODE_RIGHT_SHIFT;
+    _sapp.keycodes[0x36] = SAPP_KEYCODE_RIGHT_SUPER;
+    _sapp.keycodes[0x31] = SAPP_KEYCODE_SPACE;
+    _sapp.keycodes[0x30] = SAPP_KEYCODE_TAB;
+    _sapp.keycodes[0x7E] = SAPP_KEYCODE_UP;
+    _sapp.keycodes[0x52] = SAPP_KEYCODE_KP_0;
+    _sapp.keycodes[0x53] = SAPP_KEYCODE_KP_1;
+    _sapp.keycodes[0x54] = SAPP_KEYCODE_KP_2;
+    _sapp.keycodes[0x55] = SAPP_KEYCODE_KP_3;
+    _sapp.keycodes[0x56] = SAPP_KEYCODE_KP_4;
+    _sapp.keycodes[0x57] = SAPP_KEYCODE_KP_5;
+    _sapp.keycodes[0x58] = SAPP_KEYCODE_KP_6;
+    _sapp.keycodes[0x59] = SAPP_KEYCODE_KP_7;
+    _sapp.keycodes[0x5B] = SAPP_KEYCODE_KP_8;
+    _sapp.keycodes[0x5C] = SAPP_KEYCODE_KP_9;
+    _sapp.keycodes[0x45] = SAPP_KEYCODE_KP_ADD;
+    _sapp.keycodes[0x41] = SAPP_KEYCODE_KP_DECIMAL;
+    _sapp.keycodes[0x4B] = SAPP_KEYCODE_KP_DIVIDE;
+    _sapp.keycodes[0x4C] = SAPP_KEYCODE_KP_ENTER;
+    _sapp.keycodes[0x51] = SAPP_KEYCODE_KP_EQUAL;
+    _sapp.keycodes[0x43] = SAPP_KEYCODE_KP_MULTIPLY;
+    _sapp.keycodes[0x4E] = SAPP_KEYCODE_KP_SUBTRACT;
+}
+
+_SOKOL_PRIVATE void _sapp_macos_discard_state(void) {
+    // NOTE: it's safe to call [release] on a nil object
+    if (_sapp.macos.keyup_monitor != nil) {
+        [NSEvent removeMonitor:_sapp.macos.keyup_monitor];
+        // NOTE: removeMonitor also releases the object
+        _sapp.macos.keyup_monitor = nil;
+    }
+    _SAPP_OBJC_RELEASE(_sapp.macos.tracking_area);
+    _SAPP_OBJC_RELEASE(_sapp.macos.app_dlg);
+    _SAPP_OBJC_RELEASE(_sapp.macos.win_dlg);
+    _SAPP_OBJC_RELEASE(_sapp.macos.view);
+    #if defined(SOKOL_METAL)
+        _SAPP_OBJC_RELEASE(_sapp.macos.mtl_device);
+    #endif
+    _SAPP_OBJC_RELEASE(_sapp.macos.window);
+}
+
+// undocumented methods for creating cursors (see GLFW 3.4 and imgui_impl_osx.mm)
+@interface NSCursor()
++ (id)_windowResizeNorthWestSouthEastCursor;
++ (id)_windowResizeNorthEastSouthWestCursor;
++ (id)_windowResizeNorthSouthCursor;
++ (id)_windowResizeEastWestCursor;
+@end
+
+_SOKOL_PRIVATE void _sapp_macos_init_cursors(void) {
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_DEFAULT] = nil; // not a bug
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_ARROW] = [NSCursor arrowCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_IBEAM] = [NSCursor IBeamCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_CROSSHAIR] = [NSCursor crosshairCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_POINTING_HAND] = [NSCursor pointingHandCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_RESIZE_EW] = [NSCursor respondsToSelector:@selector(_windowResizeEastWestCursor)] ? [NSCursor _windowResizeEastWestCursor] : [NSCursor resizeLeftRightCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_RESIZE_NS] = [NSCursor respondsToSelector:@selector(_windowResizeNorthSouthCursor)] ? [NSCursor _windowResizeNorthSouthCursor] : [NSCursor resizeUpDownCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_RESIZE_NWSE] = [NSCursor respondsToSelector:@selector(_windowResizeNorthWestSouthEastCursor)] ? [NSCursor _windowResizeNorthWestSouthEastCursor] : [NSCursor closedHandCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_RESIZE_NESW] = [NSCursor respondsToSelector:@selector(_windowResizeNorthEastSouthWestCursor)] ? [NSCursor _windowResizeNorthEastSouthWestCursor] : [NSCursor closedHandCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_RESIZE_ALL] = [NSCursor closedHandCursor];
+    _sapp.macos.cursors[SAPP_MOUSECURSOR_NOT_ALLOWED] = [NSCursor operationNotAllowedCursor];
+}
+
+_SOKOL_PRIVATE void _sapp_macos_run(const sapp_desc* desc) {
+    _sapp_init_state(desc);
+    _sapp_macos_init_keytable();
+    [NSApplication sharedApplication];
+
+    // set the application dock icon as early as possible, otherwise
+    // the dummy icon will be visible for a short time
+    sapp_set_icon(&_sapp.desc.icon);
+    _sapp.macos.app_dlg = [[_sapp_macos_app_delegate alloc] init];
+    NSApp.delegate = _sapp.macos.app_dlg;
+
+    // workaround for "no key-up sent while Cmd is pressed" taken from GLFW:
+    NSEvent* (^keyup_monitor)(NSEvent*) = ^NSEvent* (NSEvent* event) {
+        if ([event modifierFlags] & NSEventModifierFlagCommand) {
+            [[NSApp keyWindow] sendEvent:event];
+        }
+        return event;
+    };
+    _sapp.macos.keyup_monitor = [NSEvent addLocalMonitorForEventsMatchingMask:NSEventMaskKeyUp handler:keyup_monitor];
+
+    [NSApp run];
+    // NOTE: [NSApp run] never returns, instead cleanup code
+    // must be put into applicationWillTerminate
+}
+
+/* MacOS entry function */
+#if !defined(SOKOL_NO_ENTRY)
+int main(int argc, char* argv[]) {
+    sapp_desc desc = sokol_main(argc, argv);
+    _sapp_macos_run(&desc);
+    return 0;
+}
+#endif /* SOKOL_NO_ENTRY */
+
+_SOKOL_PRIVATE uint32_t _sapp_macos_mods(NSEvent* ev) {
+    const NSEventModifierFlags f = (ev == nil) ? NSEvent.modifierFlags : ev.modifierFlags;
+    const NSUInteger b = NSEvent.pressedMouseButtons;
+    uint32_t m = 0;
+    if (f & NSEventModifierFlagShift) {
+        m |= SAPP_MODIFIER_SHIFT;
+    }
+    if (f & NSEventModifierFlagControl) {
+        m |= SAPP_MODIFIER_CTRL;
+    }
+    if (f & NSEventModifierFlagOption) {
+        m |= SAPP_MODIFIER_ALT;
+    }
+    if (f & NSEventModifierFlagCommand) {
+        m |= SAPP_MODIFIER_SUPER;
+    }
+    if (0 != (b & (1<<0))) {
+        m |= SAPP_MODIFIER_LMB;
+    }
+    if (0 != (b & (1<<1))) {
+        m |= SAPP_MODIFIER_RMB;
+    }
+    if (0 != (b & (1<<2))) {
+        m |= SAPP_MODIFIER_MMB;
+    }
+    return m;
+}
+
+_SOKOL_PRIVATE void _sapp_macos_mouse_event(sapp_event_type type, sapp_mousebutton btn, uint32_t mod) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp.event.mouse_button = btn;
+        _sapp.event.modifiers = mod;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_key_event(sapp_event_type type, sapp_keycode key, bool repeat, uint32_t mod) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp.event.key_code = key;
+        _sapp.event.key_repeat = repeat;
+        _sapp.event.modifiers = mod;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_app_event(sapp_event_type type) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+/* NOTE: unlike the iOS version of this function, the macOS version
+    can dynamically update the DPI scaling factor when a window is moved
+    between HighDPI / LowDPI screens.
+*/
+_SOKOL_PRIVATE void _sapp_macos_update_dimensions(void) {
+    if (_sapp.desc.high_dpi) {
+        _sapp.dpi_scale = [_sapp.macos.window screen].backingScaleFactor;
+    }
+    else {
+        _sapp.dpi_scale = 1.0f;
+    }
+    const NSRect bounds = [_sapp.macos.view bounds];
+    _sapp.window_width = (int)roundf(bounds.size.width);
+    _sapp.window_height = (int)roundf(bounds.size.height);
+    #if defined(SOKOL_METAL)
+        _sapp.framebuffer_width = (int)roundf(bounds.size.width * _sapp.dpi_scale);
+        _sapp.framebuffer_height = (int)roundf(bounds.size.height * _sapp.dpi_scale);
+        const CGSize fb_size = _sapp.macos.view.drawableSize;
+        const int cur_fb_width = (int)roundf(fb_size.width);
+        const int cur_fb_height = (int)roundf(fb_size.height);
+        const bool dim_changed = (_sapp.framebuffer_width != cur_fb_width) ||
+                                 (_sapp.framebuffer_height != cur_fb_height);
+    #elif defined(SOKOL_GLCORE33)
+        const int cur_fb_width = (int)roundf(bounds.size.width * _sapp.dpi_scale);
+        const int cur_fb_height = (int)roundf(bounds.size.height * _sapp.dpi_scale);
+        const bool dim_changed = (_sapp.framebuffer_width != cur_fb_width) ||
+                                 (_sapp.framebuffer_height != cur_fb_height);
+        _sapp.framebuffer_width = cur_fb_width;
+        _sapp.framebuffer_height = cur_fb_height;
+    #endif
+    if (_sapp.framebuffer_width == 0) {
+        _sapp.framebuffer_width = 1;
+    }
+    if (_sapp.framebuffer_height == 0) {
+        _sapp.framebuffer_height = 1;
+    }
+    if (_sapp.window_width == 0) {
+        _sapp.window_width = 1;
+    }
+    if (_sapp.window_height == 0) {
+        _sapp.window_height = 1;
+    }
+    if (dim_changed) {
+        #if defined(SOKOL_METAL)
+            CGSize drawable_size = { (CGFloat) _sapp.framebuffer_width, (CGFloat) _sapp.framebuffer_height };
+            _sapp.macos.view.drawableSize = drawable_size;
+        #else
+            // nothing to do for GL?
+        #endif
+        if (!_sapp.first_frame) {
+            _sapp_macos_app_event(SAPP_EVENTTYPE_RESIZED);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_toggle_fullscreen(void) {
+    /* NOTE: the _sapp.fullscreen flag is also notified by the
+       windowDidEnterFullscreen / windowDidExitFullscreen
+       event handlers
+    */
+    _sapp.fullscreen = !_sapp.fullscreen;
+    [_sapp.macos.window toggleFullScreen:nil];
+}
+
+_SOKOL_PRIVATE void _sapp_macos_set_clipboard_string(const char* str) {
+    @autoreleasepool {
+        NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+        [pasteboard declareTypes:@[NSPasteboardTypeString] owner:nil];
+        [pasteboard setString:@(str) forType:NSPasteboardTypeString];
+    }
+}
+
+_SOKOL_PRIVATE const char* _sapp_macos_get_clipboard_string(void) {
+    SOKOL_ASSERT(_sapp.clipboard.buffer);
+    @autoreleasepool {
+        _sapp.clipboard.buffer[0] = 0;
+        NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+        if (![[pasteboard types] containsObject:NSPasteboardTypeString]) {
+            return _sapp.clipboard.buffer;
+        }
+        NSString* str = [pasteboard stringForType:NSPasteboardTypeString];
+        if (!str) {
+            return _sapp.clipboard.buffer;
+        }
+        _sapp_strcpy([str UTF8String], _sapp.clipboard.buffer, _sapp.clipboard.buf_size);
+    }
+    return _sapp.clipboard.buffer;
+}
+
+_SOKOL_PRIVATE void _sapp_macos_update_window_title(void) {
+    [_sapp.macos.window setTitle: [NSString stringWithUTF8String:_sapp.window_title]];
+}
+
+_SOKOL_PRIVATE void _sapp_macos_mouse_update_from_nspoint(NSPoint mouse_pos, bool clear_dxdy) {
+    if (!_sapp.mouse.locked) {
+        float new_x = mouse_pos.x * _sapp.dpi_scale;
+        float new_y = _sapp.framebuffer_height - (mouse_pos.y * _sapp.dpi_scale) - 1;
+        if (clear_dxdy) {
+            _sapp.mouse.dx = 0.0f;
+            _sapp.mouse.dy = 0.0f;
+        }
+        else if (_sapp.mouse.pos_valid) {
+            // don't update dx/dy in the very first update
+            _sapp.mouse.dx = new_x - _sapp.mouse.x;
+            _sapp.mouse.dy = new_y - _sapp.mouse.y;
+        }
+        _sapp.mouse.x = new_x;
+        _sapp.mouse.y = new_y;
+        _sapp.mouse.pos_valid = true;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_mouse_update_from_nsevent(NSEvent* event, bool clear_dxdy) {
+    _sapp_macos_mouse_update_from_nspoint(event.locationInWindow, clear_dxdy);
+}
+
+_SOKOL_PRIVATE void _sapp_macos_show_mouse(bool visible) {
+    /* NOTE: this function is only called when the mouse visibility actually changes */
+    if (visible) {
+        CGDisplayShowCursor(kCGDirectMainDisplay);
+    }
+    else {
+        CGDisplayHideCursor(kCGDirectMainDisplay);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_lock_mouse(bool lock) {
+    if (lock == _sapp.mouse.locked) {
+        return;
+    }
+    _sapp.mouse.dx = 0.0f;
+    _sapp.mouse.dy = 0.0f;
+    _sapp.mouse.locked = lock;
+    /*
+        NOTE that this code doesn't warp the mouse cursor to the window
+        center as everybody else does it. This lead to a spike in the
+        *second* mouse-moved event after the warp happened. The
+        mouse centering doesn't seem to be required (mouse-moved events
+        are reported correctly even when the cursor is at an edge of the screen).
+
+        NOTE also that the hide/show of the mouse cursor should properly
+        stack with calls to sapp_show_mouse()
+    */
+    if (_sapp.mouse.locked) {
+        CGAssociateMouseAndMouseCursorPosition(NO);
+        [NSCursor hide];
+    }
+    else {
+        [NSCursor unhide];
+        CGAssociateMouseAndMouseCursorPosition(YES);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_update_cursor(sapp_mouse_cursor cursor, bool shown) {
+    // show/hide cursor only if visibility status has changed (required because show/hide stacks)
+    if (shown != _sapp.mouse.shown) {
+        if (shown) {
+            [NSCursor unhide];
+        }
+        else {
+            [NSCursor hide];
+        }
+    }
+    // update cursor type
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    if (_sapp.macos.cursors[cursor]) {
+        [_sapp.macos.cursors[cursor] set];
+    }
+    else {
+        [[NSCursor arrowCursor] set];
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_macos_set_icon(const sapp_icon_desc* icon_desc, int num_images) {
+    NSDockTile* dock_tile = NSApp.dockTile;
+    const int wanted_width = (int) dock_tile.size.width;
+    const int wanted_height = (int) dock_tile.size.height;
+    const int img_index = _sapp_image_bestmatch(icon_desc->images, num_images, wanted_width, wanted_height);
+    const sapp_image_desc* img_desc = &icon_desc->images[img_index];
+
+    CGColorSpaceRef cg_color_space = CGColorSpaceCreateDeviceRGB();
+    CFDataRef cf_data = CFDataCreate(kCFAllocatorDefault, (const UInt8*)img_desc->pixels.ptr, (CFIndex)img_desc->pixels.size);
+    CGDataProviderRef cg_data_provider = CGDataProviderCreateWithCFData(cf_data);
+    CGImageRef cg_img = CGImageCreate(
+        (size_t)img_desc->width,    // width
+        (size_t)img_desc->height,   // height
+        8,                          // bitsPerComponent
+        32,                         // bitsPerPixel
+        (size_t)img_desc->width * 4,// bytesPerRow
+        cg_color_space,             // space
+        kCGImageAlphaLast | kCGImageByteOrderDefault,  // bitmapInfo
+        cg_data_provider,           // provider
+        NULL,                       // decode
+        false,                      // shouldInterpolate
+        kCGRenderingIntentDefault);
+    CFRelease(cf_data);
+    CGDataProviderRelease(cg_data_provider);
+    CGColorSpaceRelease(cg_color_space);
+
+    NSImage* ns_image = [[NSImage alloc] initWithCGImage:cg_img size:dock_tile.size];
+    dock_tile.contentView = [NSImageView imageViewWithImage:ns_image];
+    [dock_tile display];
+    _SAPP_OBJC_RELEASE(ns_image);
+    CGImageRelease(cg_img);
+}
+
+_SOKOL_PRIVATE void _sapp_macos_frame(void) {
+    _sapp_frame();
+    if (_sapp.quit_requested || _sapp.quit_ordered) {
+        [_sapp.macos.window performClose:nil];
+    }
+}
+
+@implementation _sapp_macos_app_delegate
+- (void)applicationDidFinishLaunching:(NSNotification*)aNotification {
+    _SOKOL_UNUSED(aNotification);
+    _sapp_macos_init_cursors();
+    if ((_sapp.window_width == 0) || (_sapp.window_height == 0)) {
+        // use 4/5 of screen size as default size
+        NSRect screen_rect = NSScreen.mainScreen.frame;
+        if (_sapp.window_width == 0) {
+            _sapp.window_width = (int)roundf((screen_rect.size.width * 4.0f) / 5.0f);
+        }
+        if (_sapp.window_height == 0) {
+            _sapp.window_height = (int)roundf((screen_rect.size.height * 4.0f) / 5.0f);
+        }
+    }
+    const NSUInteger style =
+        NSWindowStyleMaskTitled |
+        NSWindowStyleMaskClosable |
+        NSWindowStyleMaskMiniaturizable |
+        NSWindowStyleMaskResizable;
+    NSRect window_rect = NSMakeRect(0, 0, _sapp.window_width, _sapp.window_height);
+    _sapp.macos.window = [[_sapp_macos_window alloc]
+        initWithContentRect:window_rect
+        styleMask:style
+        backing:NSBackingStoreBuffered
+        defer:NO];
+    _sapp.macos.window.releasedWhenClosed = NO; // this is necessary for proper cleanup in applicationWillTerminate
+    _sapp.macos.window.title = [NSString stringWithUTF8String:_sapp.window_title];
+    _sapp.macos.window.acceptsMouseMovedEvents = YES;
+    _sapp.macos.window.restorable = YES;
+
+    _sapp.macos.win_dlg = [[_sapp_macos_window_delegate alloc] init];
+    _sapp.macos.window.delegate = _sapp.macos.win_dlg;
+    #if defined(SOKOL_METAL)
+        NSInteger max_fps = 60;
+        #if (__MAC_OS_X_VERSION_MAX_ALLOWED >= 120000)
+        if (@available(macOS 12.0, *)) {
+            max_fps = [NSScreen.mainScreen maximumFramesPerSecond];
+        }
+        #endif
+        _sapp.macos.mtl_device = MTLCreateSystemDefaultDevice();
+        _sapp.macos.view = [[_sapp_macos_view alloc] init];
+        [_sapp.macos.view updateTrackingAreas];
+        _sapp.macos.view.preferredFramesPerSecond = max_fps / _sapp.swap_interval;
+        _sapp.macos.view.device = _sapp.macos.mtl_device;
+        _sapp.macos.view.colorPixelFormat = MTLPixelFormatBGRA8Unorm;
+        _sapp.macos.view.depthStencilPixelFormat = MTLPixelFormatDepth32Float_Stencil8;
+        _sapp.macos.view.sampleCount = (NSUInteger) _sapp.sample_count;
+        _sapp.macos.view.autoResizeDrawable = false;
+        _sapp.macos.window.contentView = _sapp.macos.view;
+        [_sapp.macos.window makeFirstResponder:_sapp.macos.view];
+        _sapp.macos.view.layer.magnificationFilter = kCAFilterNearest;
+    #elif defined(SOKOL_GLCORE33)
+        NSOpenGLPixelFormatAttribute attrs[32];
+        int i = 0;
+        attrs[i++] = NSOpenGLPFAAccelerated;
+        attrs[i++] = NSOpenGLPFADoubleBuffer;
+        attrs[i++] = NSOpenGLPFAOpenGLProfile;
+        const int glVersion = _sapp.desc.gl_major_version * 10 + _sapp.desc.gl_minor_version;
+        switch(glVersion) {
+            case 10: attrs[i++] = NSOpenGLProfileVersionLegacy;  break;
+            case 32: attrs[i++] = NSOpenGLProfileVersion3_2Core; break;
+            case 41: attrs[i++] = NSOpenGLProfileVersion4_1Core; break;
+            default:
+                _SAPP_PANIC(MACOS_INVALID_NSOPENGL_PROFILE);
+        }
+        attrs[i++] = NSOpenGLPFAColorSize; attrs[i++] = 24;
+        attrs[i++] = NSOpenGLPFAAlphaSize; attrs[i++] = 8;
+        attrs[i++] = NSOpenGLPFADepthSize; attrs[i++] = 24;
+        attrs[i++] = NSOpenGLPFAStencilSize; attrs[i++] = 8;
+        if (_sapp.sample_count > 1) {
+            attrs[i++] = NSOpenGLPFAMultisample;
+            attrs[i++] = NSOpenGLPFASampleBuffers; attrs[i++] = 1;
+            attrs[i++] = NSOpenGLPFASamples; attrs[i++] = (NSOpenGLPixelFormatAttribute)_sapp.sample_count;
+        }
+        else {
+            attrs[i++] = NSOpenGLPFASampleBuffers; attrs[i++] = 0;
+        }
+        attrs[i++] = 0;
+        NSOpenGLPixelFormat* glpixelformat_obj = [[NSOpenGLPixelFormat alloc] initWithAttributes:attrs];
+        SOKOL_ASSERT(glpixelformat_obj != nil);
+
+        _sapp.macos.view = [[_sapp_macos_view alloc]
+            initWithFrame:window_rect
+            pixelFormat:glpixelformat_obj];
+        _SAPP_OBJC_RELEASE(glpixelformat_obj);
+        [_sapp.macos.view updateTrackingAreas];
+        if (_sapp.desc.high_dpi) {
+            [_sapp.macos.view setWantsBestResolutionOpenGLSurface:YES];
+        }
+        else {
+            [_sapp.macos.view setWantsBestResolutionOpenGLSurface:NO];
+        }
+
+        _sapp.macos.window.contentView = _sapp.macos.view;
+        [_sapp.macos.window makeFirstResponder:_sapp.macos.view];
+
+        NSTimer* timer_obj = [NSTimer timerWithTimeInterval:0.001
+            target:_sapp.macos.view
+            selector:@selector(timerFired:)
+            userInfo:nil
+            repeats:YES];
+        [[NSRunLoop currentRunLoop] addTimer:timer_obj forMode:NSDefaultRunLoopMode];
+        timer_obj = nil;
+    #endif
+    [_sapp.macos.window center];
+    _sapp.valid = true;
+    if (_sapp.fullscreen) {
+        /* ^^^ on GL, this already toggles a rendered frame, so set the valid flag before */
+        [_sapp.macos.window toggleFullScreen:self];
+    }
+    NSApp.activationPolicy = NSApplicationActivationPolicyRegular;
+    [NSApp activateIgnoringOtherApps:YES];
+    [_sapp.macos.window makeKeyAndOrderFront:nil];
+    _sapp_macos_update_dimensions();
+    [NSEvent setMouseCoalescingEnabled:NO];
+}
+
+- (BOOL)applicationShouldTerminateAfterLastWindowClosed:(NSApplication*)sender {
+    _SOKOL_UNUSED(sender);
+    return YES;
+}
+
+- (void)applicationWillTerminate:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_call_cleanup();
+    _sapp_macos_discard_state();
+    _sapp_discard_state();
+}
+@end
+
+@implementation _sapp_macos_window_delegate
+- (BOOL)windowShouldClose:(id)sender {
+    _SOKOL_UNUSED(sender);
+    /* only give user-code a chance to intervene when sapp_quit() wasn't already called */
+    if (!_sapp.quit_ordered) {
+        /* if window should be closed and event handling is enabled, give user code
+           a chance to intervene via sapp_cancel_quit()
+        */
+        _sapp.quit_requested = true;
+        _sapp_macos_app_event(SAPP_EVENTTYPE_QUIT_REQUESTED);
+        /* user code hasn't intervened, quit the app */
+        if (_sapp.quit_requested) {
+            _sapp.quit_ordered = true;
+        }
+    }
+    if (_sapp.quit_ordered) {
+        return YES;
+    }
+    else {
+        return NO;
+    }
+}
+
+- (void)windowDidResize:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_macos_update_dimensions();
+}
+
+- (void)windowDidChangeScreen:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_timing_reset(&_sapp.timing);
+    _sapp_macos_update_dimensions();
+}
+
+- (void)windowDidMiniaturize:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_macos_app_event(SAPP_EVENTTYPE_ICONIFIED);
+}
+
+- (void)windowDidDeminiaturize:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_macos_app_event(SAPP_EVENTTYPE_RESTORED);
+}
+
+- (void)windowDidBecomeKey:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_macos_app_event(SAPP_EVENTTYPE_FOCUSED);
+}
+
+- (void)windowDidResignKey:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp_macos_app_event(SAPP_EVENTTYPE_UNFOCUSED);
+}
+
+- (void)windowDidEnterFullScreen:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp.fullscreen = true;
+}
+
+- (void)windowDidExitFullScreen:(NSNotification*)notification {
+    _SOKOL_UNUSED(notification);
+    _sapp.fullscreen = false;
+}
+@end
+
+@implementation _sapp_macos_window
+- (instancetype)initWithContentRect:(NSRect)contentRect
+                          styleMask:(NSWindowStyleMask)style
+                            backing:(NSBackingStoreType)backingStoreType
+                              defer:(BOOL)flag {
+    if (self = [super initWithContentRect:contentRect styleMask:style backing:backingStoreType defer:flag]) {
+        #if __MAC_OS_X_VERSION_MAX_ALLOWED >= 101300
+            [self registerForDraggedTypes:[NSArray arrayWithObject:NSPasteboardTypeFileURL]];
+        #endif
+    }
+    return self;
+}
+
+- (NSDragOperation)draggingEntered:(id<NSDraggingInfo>)sender {
+    return NSDragOperationCopy;
+}
+
+- (NSDragOperation)draggingUpdated:(id<NSDraggingInfo>)sender {
+    return NSDragOperationCopy;
+}
+
+- (BOOL)performDragOperation:(id<NSDraggingInfo>)sender {
+    #if __MAC_OS_X_VERSION_MAX_ALLOWED >= 101300
+    NSPasteboard *pboard = [sender draggingPasteboard];
+    if ([pboard.types containsObject:NSPasteboardTypeFileURL]) {
+        _sapp_clear_drop_buffer();
+        _sapp.drop.num_files = ((int)pboard.pasteboardItems.count > _sapp.drop.max_files) ? _sapp.drop.max_files : (int)pboard.pasteboardItems.count;
+        bool drop_failed = false;
+        for (int i = 0; i < _sapp.drop.num_files; i++) {
+            NSURL *fileUrl = [NSURL fileURLWithPath:[pboard.pasteboardItems[(NSUInteger)i] stringForType:NSPasteboardTypeFileURL]];
+            if (!_sapp_strcpy(fileUrl.standardizedURL.path.UTF8String, _sapp_dropped_file_path_ptr(i), _sapp.drop.max_path_length)) {
+                _SAPP_ERROR(DROPPED_FILE_PATH_TOO_LONG);
+                drop_failed = true;
+                break;
+            }
+        }
+        if (!drop_failed) {
+            if (_sapp_events_enabled()) {
+                _sapp_macos_mouse_update_from_nspoint(sender.draggingLocation, true);
+                _sapp_init_event(SAPP_EVENTTYPE_FILES_DROPPED);
+                _sapp.event.modifiers = _sapp_macos_mods(nil);
+                _sapp_call_event(&_sapp.event);
+            }
+        }
+        else {
+            _sapp_clear_drop_buffer();
+            _sapp.drop.num_files = 0;
+        }
+        return YES;
+    }
+    #endif
+    return NO;
+}
+@end
+
+@implementation _sapp_macos_view
+#if defined(SOKOL_GLCORE33)
+- (void)timerFired:(id)sender {
+    _SOKOL_UNUSED(sender);
+    [self setNeedsDisplay:YES];
+}
+- (void)prepareOpenGL {
+    [super prepareOpenGL];
+    GLint swapInt = 1;
+    NSOpenGLContext* ctx = [_sapp.macos.view openGLContext];
+    [ctx setValues:&swapInt forParameter:NSOpenGLContextParameterSwapInterval];
+    [ctx makeCurrentContext];
+}
+#endif
+
+_SOKOL_PRIVATE void _sapp_macos_poll_input_events() {
+    /*
+
+    NOTE: late event polling temporarily out-commented to check if this
+    causes infrequent and almost impossible to reproduce problems with the
+    window close events, see:
+    https://github.com/floooh/sokol/pull/483#issuecomment-805148815
+
+
+    const NSEventMask mask = NSEventMaskLeftMouseDown |
+                             NSEventMaskLeftMouseUp|
+                             NSEventMaskRightMouseDown |
+                             NSEventMaskRightMouseUp |
+                             NSEventMaskMouseMoved |
+                             NSEventMaskLeftMouseDragged |
+                             NSEventMaskRightMouseDragged |
+                             NSEventMaskMouseEntered |
+                             NSEventMaskMouseExited |
+                             NSEventMaskKeyDown |
+                             NSEventMaskKeyUp |
+                             NSEventMaskCursorUpdate |
+                             NSEventMaskScrollWheel |
+                             NSEventMaskTabletPoint |
+                             NSEventMaskTabletProximity |
+                             NSEventMaskOtherMouseDown |
+                             NSEventMaskOtherMouseUp |
+                             NSEventMaskOtherMouseDragged |
+                             NSEventMaskPressure |
+                             NSEventMaskDirectTouch;
+    @autoreleasepool {
+        for (;;) {
+            // NOTE: using NSDefaultRunLoopMode here causes stuttering in the GL backend,
+            // see: https://github.com/floooh/sokol/issues/486
+            NSEvent* event = [NSApp nextEventMatchingMask:mask untilDate:nil inMode:NSEventTrackingRunLoopMode dequeue:YES];
+            if (event == nil) {
+                break;
+            }
+            [NSApp sendEvent:event];
+        }
+    }
+    */
+}
+
+- (void)drawRect:(NSRect)rect {
+    _SOKOL_UNUSED(rect);
+    _sapp_timing_measure(&_sapp.timing);
+    /* Catch any last-moment input events */
+    _sapp_macos_poll_input_events();
+    @autoreleasepool {
+        _sapp_macos_frame();
+    }
+    #if !defined(SOKOL_METAL)
+    [[_sapp.macos.view openGLContext] flushBuffer];
+    #endif
+}
+
+- (BOOL)isOpaque {
+    return YES;
+}
+- (BOOL)canBecomeKeyView {
+    return YES;
+}
+- (BOOL)acceptsFirstResponder {
+    return YES;
+}
+- (void)updateTrackingAreas {
+    if (_sapp.macos.tracking_area != nil) {
+        [self removeTrackingArea:_sapp.macos.tracking_area];
+        _SAPP_OBJC_RELEASE(_sapp.macos.tracking_area);
+    }
+    const NSTrackingAreaOptions options = NSTrackingMouseEnteredAndExited |
+                                          NSTrackingActiveInKeyWindow |
+                                          NSTrackingEnabledDuringMouseDrag |
+                                          NSTrackingCursorUpdate |
+                                          NSTrackingInVisibleRect |
+                                          NSTrackingAssumeInside;
+    _sapp.macos.tracking_area = [[NSTrackingArea alloc] initWithRect:[self bounds] options:options owner:self userInfo:nil];
+    [self addTrackingArea:_sapp.macos.tracking_area];
+    [super updateTrackingAreas];
+}
+
+// helper function to make GL context active
+static void _sapp_gl_make_current(void) {
+    #if defined(SOKOL_GLCORE33)
+    [[_sapp.macos.view openGLContext] makeCurrentContext];
+    #endif
+}
+
+- (void)mouseEntered:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, true);
+    /* don't send mouse enter/leave while dragging (so that it behaves the same as
+       on Windows while SetCapture is active
+    */
+    if (0 == _sapp.macos.mouse_buttons) {
+        _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_ENTER, SAPP_MOUSEBUTTON_INVALID, _sapp_macos_mods(event));
+    }
+}
+- (void)mouseExited:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, true);
+    if (0 == _sapp.macos.mouse_buttons) {
+        _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_LEAVE, SAPP_MOUSEBUTTON_INVALID, _sapp_macos_mods(event));
+    }
+}
+- (void)mouseDown:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_LEFT, _sapp_macos_mods(event));
+    _sapp.macos.mouse_buttons |= (1<<SAPP_MOUSEBUTTON_LEFT);
+}
+- (void)mouseUp:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_LEFT, _sapp_macos_mods(event));
+    _sapp.macos.mouse_buttons &= ~(1<<SAPP_MOUSEBUTTON_LEFT);
+}
+- (void)rightMouseDown:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_RIGHT, _sapp_macos_mods(event));
+    _sapp.macos.mouse_buttons |= (1<<SAPP_MOUSEBUTTON_RIGHT);
+}
+- (void)rightMouseUp:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_RIGHT, _sapp_macos_mods(event));
+    _sapp.macos.mouse_buttons &= ~(1<<SAPP_MOUSEBUTTON_RIGHT);
+}
+- (void)otherMouseDown:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (2 == event.buttonNumber) {
+        _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_MIDDLE, _sapp_macos_mods(event));
+        _sapp.macos.mouse_buttons |= (1<<SAPP_MOUSEBUTTON_MIDDLE);
+    }
+}
+- (void)otherMouseUp:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (2 == event.buttonNumber) {
+        _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_MIDDLE, _sapp_macos_mods(event));
+        _sapp.macos.mouse_buttons &= (1<<SAPP_MOUSEBUTTON_MIDDLE);
+    }
+}
+- (void)otherMouseDragged:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (2 == event.buttonNumber) {
+        if (_sapp.mouse.locked) {
+            _sapp.mouse.dx = [event deltaX];
+            _sapp.mouse.dy = [event deltaY];
+        }
+        _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID, _sapp_macos_mods(event));
+    }
+}
+- (void)mouseMoved:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (_sapp.mouse.locked) {
+        _sapp.mouse.dx = [event deltaX];
+        _sapp.mouse.dy = [event deltaY];
+    }
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID , _sapp_macos_mods(event));
+}
+- (void)mouseDragged:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (_sapp.mouse.locked) {
+        _sapp.mouse.dx = [event deltaX];
+        _sapp.mouse.dy = [event deltaY];
+    }
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID , _sapp_macos_mods(event));
+}
+- (void)rightMouseDragged:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, false);
+    if (_sapp.mouse.locked) {
+        _sapp.mouse.dx = [event deltaX];
+        _sapp.mouse.dy = [event deltaY];
+    }
+    _sapp_macos_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID, _sapp_macos_mods(event));
+}
+- (void)scrollWheel:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_mouse_update_from_nsevent(event, true);
+    if (_sapp_events_enabled()) {
+        float dx = (float) event.scrollingDeltaX;
+        float dy = (float) event.scrollingDeltaY;
+        if (event.hasPreciseScrollingDeltas) {
+            dx *= 0.1;
+            dy *= 0.1;
+        }
+        if ((_sapp_absf(dx) > 0.0f) || (_sapp_absf(dy) > 0.0f)) {
+            _sapp_init_event(SAPP_EVENTTYPE_MOUSE_SCROLL);
+            _sapp.event.modifiers = _sapp_macos_mods(event);
+            _sapp.event.scroll_x = dx;
+            _sapp.event.scroll_y = dy;
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+- (void)keyDown:(NSEvent*)event {
+    if (_sapp_events_enabled()) {
+        _sapp_gl_make_current();
+        const uint32_t mods = _sapp_macos_mods(event);
+        const sapp_keycode key_code = _sapp_translate_key(event.keyCode);
+        _sapp_macos_key_event(SAPP_EVENTTYPE_KEY_DOWN, key_code, event.isARepeat, mods);
+        const NSString* chars = event.characters;
+        const NSUInteger len = chars.length;
+        if (len > 0) {
+            _sapp_init_event(SAPP_EVENTTYPE_CHAR);
+            _sapp.event.modifiers = mods;
+            for (NSUInteger i = 0; i < len; i++) {
+                const unichar codepoint = [chars characterAtIndex:i];
+                if ((codepoint & 0xFF00) == 0xF700) {
+                    continue;
+                }
+                _sapp.event.char_code = codepoint;
+                _sapp.event.key_repeat = event.isARepeat;
+                _sapp_call_event(&_sapp.event);
+            }
+        }
+        /* if this is a Cmd+V (paste), also send a CLIPBOARD_PASTE event */
+        if (_sapp.clipboard.enabled && (mods == SAPP_MODIFIER_SUPER) && (key_code == SAPP_KEYCODE_V)) {
+            _sapp_init_event(SAPP_EVENTTYPE_CLIPBOARD_PASTED);
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+- (void)keyUp:(NSEvent*)event {
+    _sapp_gl_make_current();
+    _sapp_macos_key_event(SAPP_EVENTTYPE_KEY_UP,
+        _sapp_translate_key(event.keyCode),
+        event.isARepeat,
+        _sapp_macos_mods(event));
+}
+- (void)flagsChanged:(NSEvent*)event {
+    const uint32_t old_f = _sapp.macos.flags_changed_store;
+    const uint32_t new_f = (uint32_t)event.modifierFlags;
+    _sapp.macos.flags_changed_store = new_f;
+    sapp_keycode key_code = SAPP_KEYCODE_INVALID;
+    bool down = false;
+    if ((new_f ^ old_f) & NSEventModifierFlagShift) {
+        key_code = SAPP_KEYCODE_LEFT_SHIFT;
+        down = 0 != (new_f & NSEventModifierFlagShift);
+    }
+    if ((new_f ^ old_f) & NSEventModifierFlagControl) {
+        key_code = SAPP_KEYCODE_LEFT_CONTROL;
+        down = 0 != (new_f & NSEventModifierFlagControl);
+    }
+    if ((new_f ^ old_f) & NSEventModifierFlagOption) {
+        key_code = SAPP_KEYCODE_LEFT_ALT;
+        down = 0 != (new_f & NSEventModifierFlagOption);
+    }
+    if ((new_f ^ old_f) & NSEventModifierFlagCommand) {
+        key_code = SAPP_KEYCODE_LEFT_SUPER;
+        down = 0 != (new_f & NSEventModifierFlagCommand);
+    }
+    if (key_code != SAPP_KEYCODE_INVALID) {
+        _sapp_macos_key_event(down ? SAPP_EVENTTYPE_KEY_DOWN : SAPP_EVENTTYPE_KEY_UP,
+            key_code,
+            false,
+            _sapp_macos_mods(event));
+    }
+}
+@end
+
+#endif // macOS
+
+// ██  ██████  ███████
+// ██ ██    ██ ██
+// ██ ██    ██ ███████
+// ██ ██    ██      ██
+// ██  ██████  ███████
+//
+// >>ios
+#if defined(_SAPP_IOS)
+
+_SOKOL_PRIVATE void _sapp_ios_discard_state(void) {
+    // NOTE: it's safe to call [release] on a nil object
+    _SAPP_OBJC_RELEASE(_sapp.ios.textfield_dlg);
+    _SAPP_OBJC_RELEASE(_sapp.ios.textfield);
+    #if defined(SOKOL_METAL)
+        _SAPP_OBJC_RELEASE(_sapp.ios.view_ctrl);
+        _SAPP_OBJC_RELEASE(_sapp.ios.mtl_device);
+    #else
+        _SAPP_OBJC_RELEASE(_sapp.ios.view_ctrl);
+        _SAPP_OBJC_RELEASE(_sapp.ios.eagl_ctx);
+    #endif
+    _SAPP_OBJC_RELEASE(_sapp.ios.view);
+    _SAPP_OBJC_RELEASE(_sapp.ios.window);
+}
+
+_SOKOL_PRIVATE void _sapp_ios_run(const sapp_desc* desc) {
+    _sapp_init_state(desc);
+    static int argc = 1;
+    static char* argv[] = { (char*)"sokol_app" };
+    UIApplicationMain(argc, argv, nil, NSStringFromClass([_sapp_app_delegate class]));
+}
+
+/* iOS entry function */
+#if !defined(SOKOL_NO_ENTRY)
+int main(int argc, char* argv[]) {
+    sapp_desc desc = sokol_main(argc, argv);
+    _sapp_ios_run(&desc);
+    return 0;
+}
+#endif /* SOKOL_NO_ENTRY */
+
+_SOKOL_PRIVATE void _sapp_ios_app_event(sapp_event_type type) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_ios_touch_event(sapp_event_type type, NSSet<UITouch *>* touches, UIEvent* event) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        NSEnumerator* enumerator = event.allTouches.objectEnumerator;
+        UITouch* ios_touch;
+        while ((ios_touch = [enumerator nextObject])) {
+            if ((_sapp.event.num_touches + 1) < SAPP_MAX_TOUCHPOINTS) {
+                CGPoint ios_pos = [ios_touch locationInView:_sapp.ios.view];
+                sapp_touchpoint* cur_point = &_sapp.event.touches[_sapp.event.num_touches++];
+                cur_point->identifier = (uintptr_t) ios_touch;
+                cur_point->pos_x = ios_pos.x * _sapp.dpi_scale;
+                cur_point->pos_y = ios_pos.y * _sapp.dpi_scale;
+                cur_point->changed = [touches containsObject:ios_touch];
+            }
+        }
+        if (_sapp.event.num_touches > 0) {
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_ios_update_dimensions(void) {
+    CGRect screen_rect = UIScreen.mainScreen.bounds;
+    _sapp.framebuffer_width = (int)roundf(screen_rect.size.width * _sapp.dpi_scale);
+    _sapp.framebuffer_height = (int)roundf(screen_rect.size.height * _sapp.dpi_scale);
+    _sapp.window_width = (int)roundf(screen_rect.size.width);
+    _sapp.window_height = (int)roundf(screen_rect.size.height);
+    int cur_fb_width, cur_fb_height;
+    #if defined(SOKOL_METAL)
+        const CGSize fb_size = _sapp.ios.view.drawableSize;
+        cur_fb_width = (int)roundf(fb_size.width);
+        cur_fb_height = (int)roundf(fb_size.height);
+    #else
+        cur_fb_width = (int)roundf(_sapp.ios.view.drawableWidth);
+        cur_fb_height = (int)roundf(_sapp.ios.view.drawableHeight);
+    #endif
+    const bool dim_changed = (_sapp.framebuffer_width != cur_fb_width) ||
+                             (_sapp.framebuffer_height != cur_fb_height);
+    if (dim_changed) {
+        #if defined(SOKOL_METAL)
+            const CGSize drawable_size = { (CGFloat) _sapp.framebuffer_width, (CGFloat) _sapp.framebuffer_height };
+            _sapp.ios.view.drawableSize = drawable_size;
+        #else
+            // nothing to do here, GLKView correctly respects the view's contentScaleFactor
+        #endif
+        if (!_sapp.first_frame) {
+            _sapp_ios_app_event(SAPP_EVENTTYPE_RESIZED);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_ios_frame(void) {
+    _sapp_ios_update_dimensions();
+    _sapp_frame();
+}
+
+_SOKOL_PRIVATE void _sapp_ios_show_keyboard(bool shown) {
+    /* if not happened yet, create an invisible text field */
+    if (nil == _sapp.ios.textfield) {
+        _sapp.ios.textfield_dlg = [[_sapp_textfield_dlg alloc] init];
+        _sapp.ios.textfield = [[UITextField alloc] initWithFrame:CGRectMake(10, 10, 100, 50)];
+        _sapp.ios.textfield.keyboardType = UIKeyboardTypeDefault;
+        _sapp.ios.textfield.returnKeyType = UIReturnKeyDefault;
+        _sapp.ios.textfield.autocapitalizationType = UITextAutocapitalizationTypeNone;
+        _sapp.ios.textfield.autocorrectionType = UITextAutocorrectionTypeNo;
+        _sapp.ios.textfield.spellCheckingType = UITextSpellCheckingTypeNo;
+        _sapp.ios.textfield.hidden = YES;
+        _sapp.ios.textfield.text = @"x";
+        _sapp.ios.textfield.delegate = _sapp.ios.textfield_dlg;
+        [_sapp.ios.view_ctrl.view addSubview:_sapp.ios.textfield];
+
+        [[NSNotificationCenter defaultCenter] addObserver:_sapp.ios.textfield_dlg
+            selector:@selector(keyboardWasShown:)
+            name:UIKeyboardDidShowNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:_sapp.ios.textfield_dlg
+            selector:@selector(keyboardWillBeHidden:)
+            name:UIKeyboardWillHideNotification object:nil];
+        [[NSNotificationCenter defaultCenter] addObserver:_sapp.ios.textfield_dlg
+            selector:@selector(keyboardDidChangeFrame:)
+            name:UIKeyboardDidChangeFrameNotification object:nil];
+    }
+    if (shown) {
+        /* setting the text field as first responder brings up the onscreen keyboard */
+        [_sapp.ios.textfield becomeFirstResponder];
+    }
+    else {
+        [_sapp.ios.textfield resignFirstResponder];
+    }
+}
+
+@implementation _sapp_app_delegate
+- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
+    CGRect screen_rect = UIScreen.mainScreen.bounds;
+    _sapp.ios.window = [[UIWindow alloc] initWithFrame:screen_rect];
+    _sapp.window_width = (int)roundf(screen_rect.size.width);
+    _sapp.window_height = (int)roundf(screen_rect.size.height);
+    if (_sapp.desc.high_dpi) {
+        _sapp.dpi_scale = (float) UIScreen.mainScreen.nativeScale;
+    }
+    else {
+        _sapp.dpi_scale = 1.0f;
+    }
+    _sapp.framebuffer_width = (int)roundf(_sapp.window_width * _sapp.dpi_scale);
+    _sapp.framebuffer_height = (int)roundf(_sapp.window_height * _sapp.dpi_scale);
+    NSInteger max_fps = UIScreen.mainScreen.maximumFramesPerSecond;
+    #if defined(SOKOL_METAL)
+        _sapp.ios.mtl_device = MTLCreateSystemDefaultDevice();
+        _sapp.ios.view = [[_sapp_ios_view alloc] init];
+        _sapp.ios.view.preferredFramesPerSecond = max_fps / _sapp.swap_interval;
+        _sapp.ios.view.device = _sapp.ios.mtl_device;
+        _sapp.ios.view.colorPixelFormat = MTLPixelFormatBGRA8Unorm;
+        _sapp.ios.view.depthStencilPixelFormat = MTLPixelFormatDepth32Float_Stencil8;
+        _sapp.ios.view.sampleCount = (NSUInteger)_sapp.sample_count;
+        /* NOTE: iOS MTKView seems to ignore thew view's contentScaleFactor
+            and automatically renders at Retina resolution. We'll disable
+            autoResize and instead do the resizing in _sapp_ios_update_dimensions()
+        */
+        _sapp.ios.view.autoResizeDrawable = false;
+        _sapp.ios.view.userInteractionEnabled = YES;
+        _sapp.ios.view.multipleTouchEnabled = YES;
+        _sapp.ios.view_ctrl = [[UIViewController alloc] init];
+        _sapp.ios.view_ctrl.modalPresentationStyle = UIModalPresentationFullScreen;
+        _sapp.ios.view_ctrl.view = _sapp.ios.view;
+        _sapp.ios.window.rootViewController = _sapp.ios.view_ctrl;
+    #else
+        _sapp.ios.eagl_ctx = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES3];
+        _sapp.ios.view = [[_sapp_ios_view alloc] initWithFrame:screen_rect];
+        _sapp.ios.view.drawableColorFormat = GLKViewDrawableColorFormatRGBA8888;
+        _sapp.ios.view.drawableDepthFormat = GLKViewDrawableDepthFormat24;
+        _sapp.ios.view.drawableStencilFormat = GLKViewDrawableStencilFormatNone;
+        GLKViewDrawableMultisample msaa = _sapp.sample_count > 1 ? GLKViewDrawableMultisample4X : GLKViewDrawableMultisampleNone;
+        _sapp.ios.view.drawableMultisample = msaa;
+        _sapp.ios.view.context = _sapp.ios.eagl_ctx;
+        _sapp.ios.view.enableSetNeedsDisplay = NO;
+        _sapp.ios.view.userInteractionEnabled = YES;
+        _sapp.ios.view.multipleTouchEnabled = YES;
+        // on GLKView, contentScaleFactor appears to work just fine!
+        if (_sapp.desc.high_dpi) {
+            _sapp.ios.view.contentScaleFactor = _sapp.dpi_scale;
+        }
+        else {
+            _sapp.ios.view.contentScaleFactor = 1.0;
+        }
+        _sapp.ios.view_ctrl = [[GLKViewController alloc] init];
+        _sapp.ios.view_ctrl.view = _sapp.ios.view;
+        _sapp.ios.view_ctrl.preferredFramesPerSecond = max_fps / _sapp.swap_interval;
+        _sapp.ios.window.rootViewController = _sapp.ios.view_ctrl;
+    #endif
+    [_sapp.ios.window makeKeyAndVisible];
+
+    _sapp.valid = true;
+    return YES;
+}
+
+- (void)applicationWillResignActive:(UIApplication *)application {
+    if (!_sapp.ios.suspended) {
+        _sapp.ios.suspended = true;
+        _sapp_ios_app_event(SAPP_EVENTTYPE_SUSPENDED);
+    }
+}
+
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+    if (_sapp.ios.suspended) {
+        _sapp.ios.suspended = false;
+        _sapp_ios_app_event(SAPP_EVENTTYPE_RESUMED);
+    }
+}
+
+/* NOTE: this method will rarely ever be called, iOS application
+    which are terminated by the user are usually killed via signal 9
+    by the operating system.
+*/
+- (void)applicationWillTerminate:(UIApplication *)application {
+    _SOKOL_UNUSED(application);
+    _sapp_call_cleanup();
+    _sapp_ios_discard_state();
+    _sapp_discard_state();
+}
+@end
+
+@implementation _sapp_textfield_dlg
+- (void)keyboardWasShown:(NSNotification*)notif {
+    _sapp.onscreen_keyboard_shown = true;
+    /* query the keyboard's size, and modify the content view's size */
+    if (_sapp.desc.ios_keyboard_resizes_canvas) {
+        NSDictionary* info = notif.userInfo;
+        CGFloat kbd_h = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
+        CGRect view_frame = UIScreen.mainScreen.bounds;
+        view_frame.size.height -= kbd_h;
+        _sapp.ios.view.frame = view_frame;
+    }
+}
+- (void)keyboardWillBeHidden:(NSNotification*)notif {
+    _sapp.onscreen_keyboard_shown = false;
+    if (_sapp.desc.ios_keyboard_resizes_canvas) {
+        _sapp.ios.view.frame = UIScreen.mainScreen.bounds;
+    }
+}
+- (void)keyboardDidChangeFrame:(NSNotification*)notif {
+    /* this is for the case when the screen rotation changes while the keyboard is open */
+    if (_sapp.onscreen_keyboard_shown && _sapp.desc.ios_keyboard_resizes_canvas) {
+        NSDictionary* info = notif.userInfo;
+        CGFloat kbd_h = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
+        CGRect view_frame = UIScreen.mainScreen.bounds;
+        view_frame.size.height -= kbd_h;
+        _sapp.ios.view.frame = view_frame;
+    }
+}
+- (BOOL)textField:(UITextField*)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString*)string {
+    if (_sapp_events_enabled()) {
+        const NSUInteger len = string.length;
+        if (len > 0) {
+            for (NSUInteger i = 0; i < len; i++) {
+                unichar c = [string characterAtIndex:i];
+                if (c >= 32) {
+                    /* ignore surrogates for now */
+                    if ((c < 0xD800) || (c > 0xDFFF)) {
+                        _sapp_init_event(SAPP_EVENTTYPE_CHAR);
+                        _sapp.event.char_code = c;
+                        _sapp_call_event(&_sapp.event);
+                    }
+                }
+                if (c <= 32) {
+                    sapp_keycode k = SAPP_KEYCODE_INVALID;
+                    switch (c) {
+                        case 10: k = SAPP_KEYCODE_ENTER; break;
+                        case 32: k = SAPP_KEYCODE_SPACE; break;
+                        default: break;
+                    }
+                    if (k != SAPP_KEYCODE_INVALID) {
+                        _sapp_init_event(SAPP_EVENTTYPE_KEY_DOWN);
+                        _sapp.event.key_code = k;
+                        _sapp_call_event(&_sapp.event);
+                        _sapp_init_event(SAPP_EVENTTYPE_KEY_UP);
+                        _sapp.event.key_code = k;
+                        _sapp_call_event(&_sapp.event);
+                    }
+                }
+            }
+        }
+        else {
+            /* this was a backspace */
+            _sapp_init_event(SAPP_EVENTTYPE_KEY_DOWN);
+            _sapp.event.key_code = SAPP_KEYCODE_BACKSPACE;
+            _sapp_call_event(&_sapp.event);
+            _sapp_init_event(SAPP_EVENTTYPE_KEY_UP);
+            _sapp.event.key_code = SAPP_KEYCODE_BACKSPACE;
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+    return NO;
+}
+@end
+
+@implementation _sapp_ios_view
+- (void)drawRect:(CGRect)rect {
+    _SOKOL_UNUSED(rect);
+    _sapp_timing_measure(&_sapp.timing);
+    @autoreleasepool {
+        _sapp_ios_frame();
+    }
+}
+- (BOOL)isOpaque {
+    return YES;
+}
+- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent*)event {
+    _sapp_ios_touch_event(SAPP_EVENTTYPE_TOUCHES_BEGAN, touches, event);
+}
+- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent*)event {
+    _sapp_ios_touch_event(SAPP_EVENTTYPE_TOUCHES_MOVED, touches, event);
+}
+- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent*)event {
+    _sapp_ios_touch_event(SAPP_EVENTTYPE_TOUCHES_ENDED, touches, event);
+}
+- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent*)event {
+    _sapp_ios_touch_event(SAPP_EVENTTYPE_TOUCHES_CANCELLED, touches, event);
+}
+@end
+#endif /* TARGET_OS_IPHONE */
+
+#endif /* _SAPP_APPLE */
+
+// ███████ ███    ███ ███████  ██████ ██████  ██ ██████  ████████ ███████ ███    ██
+// ██      ████  ████ ██      ██      ██   ██ ██ ██   ██    ██    ██      ████   ██
+// █████   ██ ████ ██ ███████ ██      ██████  ██ ██████     ██    █████   ██ ██  ██
+// ██      ██  ██  ██      ██ ██      ██   ██ ██ ██         ██    ██      ██  ██ ██
+// ███████ ██      ██ ███████  ██████ ██   ██ ██ ██         ██    ███████ ██   ████
+//
+// >>emscripten
+#if defined(_SAPP_EMSCRIPTEN)
+
+#if defined(EM_JS_DEPS)
+EM_JS_DEPS(sokol_app, "$withStackSave,$allocateUTF8OnStack");
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef void (*_sapp_html5_fetch_callback) (const sapp_html5_fetch_response*);
+
+/* this function is called from a JS event handler when the user hides
+    the onscreen keyboard pressing the 'dismiss keyboard key'
+*/
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_notify_keyboard_hidden(void) {
+    _sapp.onscreen_keyboard_shown = false;
+}
+
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_onpaste(const char* str) {
+    if (_sapp.clipboard.enabled) {
+        _sapp_strcpy(str, _sapp.clipboard.buffer, _sapp.clipboard.buf_size);
+        if (_sapp_events_enabled()) {
+            _sapp_init_event(SAPP_EVENTTYPE_CLIPBOARD_PASTED);
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+
+/*  https://developer.mozilla.org/en-US/docs/Web/API/WindowEventHandlers/onbeforeunload */
+EMSCRIPTEN_KEEPALIVE int _sapp_html5_get_ask_leave_site(void) {
+    return _sapp.html5_ask_leave_site ? 1 : 0;
+}
+
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_begin_drop(int num) {
+    if (!_sapp.drop.enabled) {
+        return;
+    }
+    if (num < 0) {
+        num = 0;
+    }
+    if (num > _sapp.drop.max_files) {
+        num = _sapp.drop.max_files;
+    }
+    _sapp.drop.num_files = num;
+    _sapp_clear_drop_buffer();
+}
+
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_drop(int i, const char* name) {
+    /* NOTE: name is only the filename part, not a path */
+    if (!_sapp.drop.enabled) {
+        return;
+    }
+    if (0 == name) {
+        return;
+    }
+    SOKOL_ASSERT(_sapp.drop.num_files <= _sapp.drop.max_files);
+    if ((i < 0) || (i >= _sapp.drop.num_files)) {
+        return;
+    }
+    if (!_sapp_strcpy(name, _sapp_dropped_file_path_ptr(i), _sapp.drop.max_path_length)) {
+        _SAPP_ERROR(DROPPED_FILE_PATH_TOO_LONG);
+        _sapp.drop.num_files = 0;
+    }
+}
+
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_end_drop(int x, int y, int mods) {
+    if (!_sapp.drop.enabled) {
+        return;
+    }
+    if (0 == _sapp.drop.num_files) {
+        /* there was an error copying the filenames */
+        _sapp_clear_drop_buffer();
+        return;
+
+    }
+    if (_sapp_events_enabled()) {
+        _sapp.mouse.x = (float)x * _sapp.dpi_scale;
+        _sapp.mouse.y = (float)y * _sapp.dpi_scale;
+        _sapp.mouse.dx = 0.0f;
+        _sapp.mouse.dy = 0.0f;
+        _sapp_init_event(SAPP_EVENTTYPE_FILES_DROPPED);
+        // see sapp_js_add_dragndrop_listeners for mods constants
+        if (mods & 1) { _sapp.event.modifiers |= SAPP_MODIFIER_SHIFT; }
+        if (mods & 2) { _sapp.event.modifiers |= SAPP_MODIFIER_CTRL; }
+        if (mods & 4) { _sapp.event.modifiers |= SAPP_MODIFIER_ALT; }
+        if (mods & 8) { _sapp.event.modifiers |= SAPP_MODIFIER_SUPER; }
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_invoke_fetch_cb(int index, int success, int error_code, _sapp_html5_fetch_callback callback, uint32_t fetched_size, void* buf_ptr, uint32_t buf_size, void* user_data) {
+    sapp_html5_fetch_response response;
+    _sapp_clear(&response, sizeof(response));
+    response.succeeded = (0 != success);
+    response.error_code = (sapp_html5_fetch_error) error_code;
+    response.file_index = index;
+    response.data.ptr = buf_ptr;
+    response.data.size = fetched_size;
+    response.buffer.ptr = buf_ptr;
+    response.buffer.size = buf_size;
+    response.user_data = user_data;
+    callback(&response);
+}
+
+#ifdef __cplusplus
+} /* extern "C" */
+#endif
+
+/* Javascript helper functions for mobile virtual keyboard input */
+EM_JS(void, sapp_js_create_textfield, (void), {
+    const _sapp_inp = document.createElement("input");
+    _sapp_inp.type = "text";
+    _sapp_inp.id = "_sokol_app_input_element";
+    _sapp_inp.autocapitalize = "none";
+    _sapp_inp.addEventListener("focusout", function(_sapp_event) {
+        __sapp_emsc_notify_keyboard_hidden()
+
+    });
+    document.body.append(_sapp_inp);
+});
+
+EM_JS(void, sapp_js_focus_textfield, (void), {
+    document.getElementById("_sokol_app_input_element").focus();
+});
+
+EM_JS(void, sapp_js_unfocus_textfield, (void), {
+    document.getElementById("_sokol_app_input_element").blur();
+});
+
+EM_JS(void, sapp_js_add_beforeunload_listener, (void), {
+    Module.sokol_beforeunload = (event) => {
+        if (__sapp_html5_get_ask_leave_site() != 0) {
+            event.preventDefault();
+            event.returnValue = ' ';
+        }
+    };
+    window.addEventListener('beforeunload', Module.sokol_beforeunload);
+});
+
+EM_JS(void, sapp_js_remove_beforeunload_listener, (void), {
+    window.removeEventListener('beforeunload', Module.sokol_beforeunload);
+});
+
+EM_JS(void, sapp_js_add_clipboard_listener, (void), {
+    Module.sokol_paste = (event) => {
+        const pasted_str = event.clipboardData.getData('text');
+        withStackSave(() => {
+            const cstr = allocateUTF8OnStack(pasted_str);
+            __sapp_emsc_onpaste(cstr);
+        });
+    };
+    window.addEventListener('paste', Module.sokol_paste);
+});
+
+EM_JS(void, sapp_js_remove_clipboard_listener, (void), {
+    window.removeEventListener('paste', Module.sokol_paste);
+});
+
+EM_JS(void, sapp_js_write_clipboard, (const char* c_str), {
+    const str = UTF8ToString(c_str);
+    const ta = document.createElement('textarea');
+    ta.setAttribute('autocomplete', 'off');
+    ta.setAttribute('autocorrect', 'off');
+    ta.setAttribute('autocapitalize', 'off');
+    ta.setAttribute('spellcheck', 'false');
+    ta.style.left = -100 + 'px';
+    ta.style.top = -100 + 'px';
+    ta.style.height = 1;
+    ta.style.width = 1;
+    ta.value = str;
+    document.body.appendChild(ta);
+    ta.select();
+    document.execCommand('copy');
+    document.body.removeChild(ta);
+});
+
+_SOKOL_PRIVATE void _sapp_emsc_set_clipboard_string(const char* str) {
+    sapp_js_write_clipboard(str);
+}
+
+EM_JS(void, sapp_js_add_dragndrop_listeners, (const char* canvas_name_cstr), {
+    Module.sokol_drop_files = [];
+    const canvas_name = UTF8ToString(canvas_name_cstr);
+    const canvas = document.getElementById(canvas_name);
+    Module.sokol_dragenter = (event) => {
+        event.stopPropagation();
+        event.preventDefault();
+    };
+    Module.sokol_dragleave = (event) => {
+        event.stopPropagation();
+        event.preventDefault();
+    };
+    Module.sokol_dragover = (event) => {
+        event.stopPropagation();
+        event.preventDefault();
+    };
+    Module.sokol_drop = (event) => {
+        event.stopPropagation();
+        event.preventDefault();
+        const files = event.dataTransfer.files;
+        Module.sokol_dropped_files = files;
+        __sapp_emsc_begin_drop(files.length);
+        for (let i = 0; i < files.length; i++) {
+            withStackSave(() => {
+                const cstr = allocateUTF8OnStack(files[i].name);
+                __sapp_emsc_drop(i, cstr);
+            });
+        }
+        let mods = 0;
+        if (event.shiftKey) { mods |= 1; }
+        if (event.ctrlKey) { mods |= 2; }
+        if (event.altKey) { mods |= 4; }
+        if (event.metaKey) { mods |= 8; }
+        // FIXME? see computation of targetX/targetY in emscripten via getClientBoundingRect
+        __sapp_emsc_end_drop(event.clientX, event.clientY, mods);
+    };
+    canvas.addEventListener('dragenter', Module.sokol_dragenter, false);
+    canvas.addEventListener('dragleave', Module.sokol_dragleave, false);
+    canvas.addEventListener('dragover',  Module.sokol_dragover, false);
+    canvas.addEventListener('drop',      Module.sokol_drop, false);
+});
+
+EM_JS(uint32_t, sapp_js_dropped_file_size, (int index), {
+    \x2F\x2A\x2A @suppress {missingProperties} \x2A\x2F
+    const files = Module.sokol_dropped_files;
+    if ((index < 0) || (index >= files.length)) {
+        return 0;
+    }
+    else {
+        return files[index].size;
+    }
+});
+
+EM_JS(void, sapp_js_fetch_dropped_file, (int index, _sapp_html5_fetch_callback callback, void* buf_ptr, uint32_t buf_size, void* user_data), {
+    const reader = new FileReader();
+    reader.onload = (loadEvent) => {
+        const content = loadEvent.target.result;
+        if (content.byteLength > buf_size) {
+            // SAPP_HTML5_FETCH_ERROR_BUFFER_TOO_SMALL
+            __sapp_emsc_invoke_fetch_cb(index, 0, 1, callback, 0, buf_ptr, buf_size, user_data);
+        }
+        else {
+            HEAPU8.set(new Uint8Array(content), buf_ptr);
+            __sapp_emsc_invoke_fetch_cb(index, 1, 0, callback, content.byteLength, buf_ptr, buf_size, user_data);
+        }
+    };
+    reader.onerror = () => {
+        // SAPP_HTML5_FETCH_ERROR_OTHER
+        __sapp_emsc_invoke_fetch_cb(index, 0, 2, callback, 0, buf_ptr, buf_size, user_data);
+    };
+    \x2F\x2A\x2A @suppress {missingProperties} \x2A\x2F
+    const files = Module.sokol_dropped_files;
+    reader.readAsArrayBuffer(files[index]);
+});
+
+EM_JS(void, sapp_js_remove_dragndrop_listeners, (const char* canvas_name_cstr), {
+    const canvas_name = UTF8ToString(canvas_name_cstr);
+    const canvas = document.getElementById(canvas_name);
+    canvas.removeEventListener('dragenter', Module.sokol_dragenter);
+    canvas.removeEventListener('dragleave', Module.sokol_dragleave);
+    canvas.removeEventListener('dragover',  Module.sokol_dragover);
+    canvas.removeEventListener('drop',      Module.sokol_drop);
+});
+
+/* called from the emscripten event handler to update the keyboard visibility
+    state, this must happen from an JS input event handler, otherwise
+    the request will be ignored by the browser
+*/
+_SOKOL_PRIVATE void _sapp_emsc_update_keyboard_state(void) {
+    if (_sapp.emsc.wants_show_keyboard) {
+        /* create input text field on demand */
+        if (!_sapp.emsc.textfield_created) {
+            _sapp.emsc.textfield_created = true;
+            sapp_js_create_textfield();
+        }
+        /* focus the text input field, this will bring up the keyboard */
+        _sapp.onscreen_keyboard_shown = true;
+        _sapp.emsc.wants_show_keyboard = false;
+        sapp_js_focus_textfield();
+    }
+    if (_sapp.emsc.wants_hide_keyboard) {
+        /* unfocus the text input field */
+        if (_sapp.emsc.textfield_created) {
+            _sapp.onscreen_keyboard_shown = false;
+            _sapp.emsc.wants_hide_keyboard = false;
+            sapp_js_unfocus_textfield();
+        }
+    }
+}
+
+/* actually showing the onscreen keyboard must be initiated from a JS
+    input event handler, so we'll just keep track of the desired
+    state, and the actual state change will happen with the next input event
+*/
+_SOKOL_PRIVATE void _sapp_emsc_show_keyboard(bool show) {
+    if (show) {
+        _sapp.emsc.wants_show_keyboard = true;
+    }
+    else {
+        _sapp.emsc.wants_hide_keyboard = true;
+    }
+}
+
+EM_JS(void, sapp_js_init, (const char* c_str_target), {
+    // lookup and store canvas object by name
+    const target_str = UTF8ToString(c_str_target);
+    Module.sapp_emsc_target = document.getElementById(target_str);
+    if (!Module.sapp_emsc_target) {
+        console.log("sokol_app.h: invalid target:" + target_str);
+    }
+    if (!Module.sapp_emsc_target.requestPointerLock) {
+        console.log("sokol_app.h: target doesn't support requestPointerLock:" + target_str);
+    }
+});
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_pointerlockchange_cb(int emsc_type, const EmscriptenPointerlockChangeEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(emsc_type);
+    _SOKOL_UNUSED(user_data);
+    _sapp.mouse.locked = emsc_event->isActive;
+    return EM_TRUE;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_pointerlockerror_cb(int emsc_type, const void* reserved, void* user_data) {
+    _SOKOL_UNUSED(emsc_type);
+    _SOKOL_UNUSED(reserved);
+    _SOKOL_UNUSED(user_data);
+    _sapp.mouse.locked = false;
+    _sapp.emsc.mouse_lock_requested = false;
+    return true;
+}
+
+EM_JS(void, sapp_js_request_pointerlock, (void), {
+    if (Module.sapp_emsc_target) {
+        if (Module.sapp_emsc_target.requestPointerLock) {
+            Module.sapp_emsc_target.requestPointerLock();
+        }
+    }
+});
+
+EM_JS(void, sapp_js_exit_pointerlock, (void), {
+    if (document.exitPointerLock) {
+        document.exitPointerLock();
+    }
+});
+
+_SOKOL_PRIVATE void _sapp_emsc_lock_mouse(bool lock) {
+    if (lock) {
+        /* request mouse-lock during event handler invocation (see _sapp_emsc_update_mouse_lock_state) */
+        _sapp.emsc.mouse_lock_requested = true;
+    }
+    else {
+        /* NOTE: the _sapp.mouse_locked state will be set in the pointerlockchange callback */
+        _sapp.emsc.mouse_lock_requested = false;
+        sapp_js_exit_pointerlock();
+    }
+}
+
+/* called from inside event handlers to check if mouse lock had been requested,
+   and if yes, actually enter mouse lock.
+*/
+_SOKOL_PRIVATE void _sapp_emsc_update_mouse_lock_state(void) {
+    if (_sapp.emsc.mouse_lock_requested) {
+        _sapp.emsc.mouse_lock_requested = false;
+        sapp_js_request_pointerlock();
+    }
+}
+
+// set mouse cursor type
+EM_JS(void, sapp_js_set_cursor, (int cursor_type, int shown), {
+    if (Module.sapp_emsc_target) {
+        let cursor;
+        if (shown === 0) {
+            cursor = "none";
+        }
+        else switch (cursor_type) {
+            case 0: cursor = "auto"; break;         // SAPP_MOUSECURSOR_DEFAULT
+            case 1: cursor = "default"; break;      // SAPP_MOUSECURSOR_ARROW
+            case 2: cursor = "text"; break;         // SAPP_MOUSECURSOR_IBEAM
+            case 3: cursor = "crosshair"; break;    // SAPP_MOUSECURSOR_CROSSHAIR
+            case 4: cursor = "pointer"; break;      // SAPP_MOUSECURSOR_POINTING_HAND
+            case 5: cursor = "ew-resize"; break;    // SAPP_MOUSECURSOR_RESIZE_EW
+            case 6: cursor = "ns-resize"; break;    // SAPP_MOUSECURSOR_RESIZE_NS
+            case 7: cursor = "nwse-resize"; break;  // SAPP_MOUSECURSOR_RESIZE_NWSE
+            case 8: cursor = "nesw-resize"; break;  // SAPP_MOUSECURSOR_RESIZE_NESW
+            case 9: cursor = "all-scroll"; break;   // SAPP_MOUSECURSOR_RESIZE_ALL
+            case 10: cursor = "not-allowed"; break; // SAPP_MOUSECURSOR_NOT_ALLOWED
+            default: cursor = "auto"; break;
+        }
+        Module.sapp_emsc_target.style.cursor = cursor;
+    }
+});
+
+_SOKOL_PRIVATE void _sapp_emsc_update_cursor(sapp_mouse_cursor cursor, bool shown) {
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    sapp_js_set_cursor((int)cursor, shown ? 1 : 0);
+}
+
+/* JS helper functions to update browser tab favicon */
+EM_JS(void, sapp_js_clear_favicon, (void), {
+    const link = document.getElementById('sokol-app-favicon');
+    if (link) {
+        document.head.removeChild(link);
+    }
+});
+
+EM_JS(void, sapp_js_set_favicon, (int w, int h, const uint8_t* pixels), {
+    const canvas = document.createElement('canvas');
+    canvas.width = w;
+    canvas.height = h;
+    const ctx = canvas.getContext('2d');
+    const img_data = ctx.createImageData(w, h);
+    img_data.data.set(HEAPU8.subarray(pixels, pixels + w*h*4));
+    ctx.putImageData(img_data, 0, 0);
+    const new_link = document.createElement('link');
+    new_link.id = 'sokol-app-favicon';
+    new_link.rel = 'shortcut icon';
+    new_link.href = canvas.toDataURL();
+    document.head.appendChild(new_link);
+});
+
+_SOKOL_PRIVATE void _sapp_emsc_set_icon(const sapp_icon_desc* icon_desc, int num_images) {
+    SOKOL_ASSERT((num_images > 0) && (num_images <= SAPP_MAX_ICONIMAGES));
+    sapp_js_clear_favicon();
+    // find the best matching image candidate for 16x16 pixels
+    int img_index = _sapp_image_bestmatch(icon_desc->images, num_images, 16, 16);
+    const sapp_image_desc* img_desc = &icon_desc->images[img_index];
+    sapp_js_set_favicon(img_desc->width, img_desc->height, (const uint8_t*) img_desc->pixels.ptr);
+}
+
+#if defined(SOKOL_WGPU)
+_SOKOL_PRIVATE void _sapp_emsc_wgpu_surfaces_create(void);
+_SOKOL_PRIVATE void _sapp_emsc_wgpu_surfaces_discard(void);
+#endif
+
+_SOKOL_PRIVATE uint32_t _sapp_emsc_mouse_button_mods(uint16_t buttons) {
+    uint32_t m = 0;
+    if (0 != (buttons & (1<<0))) { m |= SAPP_MODIFIER_LMB; }
+    if (0 != (buttons & (1<<1))) { m |= SAPP_MODIFIER_RMB; } // not a bug
+    if (0 != (buttons & (1<<2))) { m |= SAPP_MODIFIER_MMB; } // not a bug
+    return m;
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_emsc_mouse_event_mods(const EmscriptenMouseEvent* ev) {
+    uint32_t m = 0;
+    if (ev->ctrlKey)    { m |= SAPP_MODIFIER_CTRL; }
+    if (ev->shiftKey)   { m |= SAPP_MODIFIER_SHIFT; }
+    if (ev->altKey)     { m |= SAPP_MODIFIER_ALT; }
+    if (ev->metaKey)    { m |= SAPP_MODIFIER_SUPER; }
+    m |= _sapp_emsc_mouse_button_mods(_sapp.emsc.mouse_buttons);
+    return m;
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_emsc_key_event_mods(const EmscriptenKeyboardEvent* ev) {
+    uint32_t m = 0;
+    if (ev->ctrlKey)    { m |= SAPP_MODIFIER_CTRL; }
+    if (ev->shiftKey)   { m |= SAPP_MODIFIER_SHIFT; }
+    if (ev->altKey)     { m |= SAPP_MODIFIER_ALT; }
+    if (ev->metaKey)    { m |= SAPP_MODIFIER_SUPER; }
+    m |= _sapp_emsc_mouse_button_mods(_sapp.emsc.mouse_buttons);
+    return m;
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_emsc_touch_event_mods(const EmscriptenTouchEvent* ev) {
+    uint32_t m = 0;
+    if (ev->ctrlKey)    { m |= SAPP_MODIFIER_CTRL; }
+    if (ev->shiftKey)   { m |= SAPP_MODIFIER_SHIFT; }
+    if (ev->altKey)     { m |= SAPP_MODIFIER_ALT; }
+    if (ev->metaKey)    { m |= SAPP_MODIFIER_SUPER; }
+    m |= _sapp_emsc_mouse_button_mods(_sapp.emsc.mouse_buttons);
+    return m;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_size_changed(int event_type, const EmscriptenUiEvent* ui_event, void* user_data) {
+    _SOKOL_UNUSED(event_type);
+    _SOKOL_UNUSED(user_data);
+    double w, h;
+    emscripten_get_element_css_size(_sapp.html5_canvas_selector, &w, &h);
+    /* The above method might report zero when toggling HTML5 fullscreen,
+       in that case use the window's inner width reported by the
+       emscripten event. This works ok when toggling *into* fullscreen
+       but doesn't properly restore the previous canvas size when switching
+       back from fullscreen.
+
+       In general, due to the HTML5's fullscreen API's flaky nature it is
+       recommended to use 'soft fullscreen' (stretching the WebGL canvas
+       over the browser windows client rect) with a CSS definition like this:
+
+            position: absolute;
+            top: 0px;
+            left: 0px;
+            margin: 0px;
+            border: 0;
+            width: 100%;
+            height: 100%;
+            overflow: hidden;
+            display: block;
+    */
+    if (w < 1.0) {
+        w = ui_event->windowInnerWidth;
+    }
+    else {
+        _sapp.window_width = (int)roundf(w);
+    }
+    if (h < 1.0) {
+        h = ui_event->windowInnerHeight;
+    }
+    else {
+        _sapp.window_height = (int)roundf(h);
+    }
+    if (_sapp.desc.high_dpi) {
+        _sapp.dpi_scale = emscripten_get_device_pixel_ratio();
+    }
+    _sapp.framebuffer_width = (int)roundf(w * _sapp.dpi_scale);
+    _sapp.framebuffer_height = (int)roundf(h * _sapp.dpi_scale);
+    SOKOL_ASSERT((_sapp.framebuffer_width > 0) && (_sapp.framebuffer_height > 0));
+    emscripten_set_canvas_element_size(_sapp.html5_canvas_selector, _sapp.framebuffer_width, _sapp.framebuffer_height);
+    #if defined(SOKOL_WGPU)
+        /* on WebGPU: recreate size-dependent rendering surfaces */
+        _sapp_emsc_wgpu_surfaces_discard();
+        _sapp_emsc_wgpu_surfaces_create();
+    #endif
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_RESIZED);
+        _sapp_call_event(&_sapp.event);
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_mouse_cb(int emsc_type, const EmscriptenMouseEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(user_data);
+    _sapp.emsc.mouse_buttons = emsc_event->buttons;
+    if (_sapp.mouse.locked) {
+        _sapp.mouse.dx = (float) emsc_event->movementX;
+        _sapp.mouse.dy = (float) emsc_event->movementY;
+    } else {
+        float new_x = emsc_event->targetX * _sapp.dpi_scale;
+        float new_y = emsc_event->targetY * _sapp.dpi_scale;
+        if (_sapp.mouse.pos_valid) {
+            _sapp.mouse.dx = new_x - _sapp.mouse.x;
+            _sapp.mouse.dy = new_y - _sapp.mouse.y;
+        }
+        _sapp.mouse.x = new_x;
+        _sapp.mouse.y = new_y;
+        _sapp.mouse.pos_valid = true;
+    }
+    if (_sapp_events_enabled() && (emsc_event->button >= 0) && (emsc_event->button < SAPP_MAX_MOUSEBUTTONS)) {
+        sapp_event_type type;
+        bool is_button_event = false;
+        bool clear_dxdy = false;
+        switch (emsc_type) {
+            case EMSCRIPTEN_EVENT_MOUSEDOWN:
+                type = SAPP_EVENTTYPE_MOUSE_DOWN;
+                is_button_event = true;
+                break;
+            case EMSCRIPTEN_EVENT_MOUSEUP:
+                type = SAPP_EVENTTYPE_MOUSE_UP;
+                is_button_event = true;
+                break;
+            case EMSCRIPTEN_EVENT_MOUSEMOVE:
+                type = SAPP_EVENTTYPE_MOUSE_MOVE;
+                break;
+            case EMSCRIPTEN_EVENT_MOUSEENTER:
+                type = SAPP_EVENTTYPE_MOUSE_ENTER;
+                clear_dxdy = true;
+                break;
+            case EMSCRIPTEN_EVENT_MOUSELEAVE:
+                type = SAPP_EVENTTYPE_MOUSE_LEAVE;
+                clear_dxdy = true;
+                break;
+            default:
+                type = SAPP_EVENTTYPE_INVALID;
+                break;
+        }
+        if (clear_dxdy) {
+            _sapp.mouse.dx = 0.0f;
+            _sapp.mouse.dy = 0.0f;
+        }
+        if (type != SAPP_EVENTTYPE_INVALID) {
+            _sapp_init_event(type);
+            _sapp.event.modifiers = _sapp_emsc_mouse_event_mods(emsc_event);
+            if (is_button_event) {
+                switch (emsc_event->button) {
+                    case 0: _sapp.event.mouse_button = SAPP_MOUSEBUTTON_LEFT; break;
+                    case 1: _sapp.event.mouse_button = SAPP_MOUSEBUTTON_MIDDLE; break;
+                    case 2: _sapp.event.mouse_button = SAPP_MOUSEBUTTON_RIGHT; break;
+                    default: _sapp.event.mouse_button = (sapp_mousebutton)emsc_event->button; break;
+                }
+            } else {
+                _sapp.event.mouse_button = SAPP_MOUSEBUTTON_INVALID;
+            }
+            _sapp_call_event(&_sapp.event);
+        }
+        // mouse lock can only be activated in mouse button events (not in move, enter or leave)
+        if (is_button_event) {
+            _sapp_emsc_update_mouse_lock_state();
+        }
+    }
+    _sapp_emsc_update_keyboard_state();
+    return true;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_wheel_cb(int emsc_type, const EmscriptenWheelEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(emsc_type);
+    _SOKOL_UNUSED(user_data);
+    _sapp.emsc.mouse_buttons = emsc_event->mouse.buttons;
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_MOUSE_SCROLL);
+        _sapp.event.modifiers = _sapp_emsc_mouse_event_mods(&emsc_event->mouse);
+        /* see https://github.com/floooh/sokol/issues/339 */
+        float scale;
+        switch (emsc_event->deltaMode) {
+            case DOM_DELTA_PIXEL: scale = -0.04f; break;
+            case DOM_DELTA_LINE:  scale = -1.33f; break;
+            case DOM_DELTA_PAGE:  scale = -10.0f; break; // FIXME: this is a guess
+            default:              scale = -0.1f; break;  // shouldn't happen
+        }
+        _sapp.event.scroll_x = scale * (float)emsc_event->deltaX;
+        _sapp.event.scroll_y = scale * (float)emsc_event->deltaY;
+        _sapp_call_event(&_sapp.event);
+    }
+    _sapp_emsc_update_keyboard_state();
+    _sapp_emsc_update_mouse_lock_state();
+    return true;
+}
+
+static struct {
+    const char* str;
+    sapp_keycode code;
+} _sapp_emsc_keymap[] = {
+    { "Backspace",      SAPP_KEYCODE_BACKSPACE },
+    { "Tab",            SAPP_KEYCODE_TAB },
+    { "Enter",          SAPP_KEYCODE_ENTER },
+    { "ShiftLeft",      SAPP_KEYCODE_LEFT_SHIFT },
+    { "ShiftRight",     SAPP_KEYCODE_RIGHT_SHIFT },
+    { "ControlLeft",    SAPP_KEYCODE_LEFT_CONTROL },
+    { "ControlRight",   SAPP_KEYCODE_RIGHT_CONTROL },
+    { "AltLeft",        SAPP_KEYCODE_LEFT_ALT },
+    { "AltRight",       SAPP_KEYCODE_RIGHT_ALT },
+    { "Pause",          SAPP_KEYCODE_PAUSE },
+    { "CapsLock",       SAPP_KEYCODE_CAPS_LOCK },
+    { "Escape",         SAPP_KEYCODE_ESCAPE },
+    { "Space",          SAPP_KEYCODE_SPACE },
+    { "PageUp",         SAPP_KEYCODE_PAGE_UP },
+    { "PageDown",       SAPP_KEYCODE_PAGE_DOWN },
+    { "End",            SAPP_KEYCODE_END },
+    { "Home",           SAPP_KEYCODE_HOME },
+    { "ArrowLeft",      SAPP_KEYCODE_LEFT },
+    { "ArrowUp",        SAPP_KEYCODE_UP },
+    { "ArrowRight",     SAPP_KEYCODE_RIGHT },
+    { "ArrowDown",      SAPP_KEYCODE_DOWN },
+    { "PrintScreen",    SAPP_KEYCODE_PRINT_SCREEN },
+    { "Insert",         SAPP_KEYCODE_INSERT },
+    { "Delete",         SAPP_KEYCODE_DELETE },
+    { "Digit0",         SAPP_KEYCODE_0 },
+    { "Digit1",         SAPP_KEYCODE_1 },
+    { "Digit2",         SAPP_KEYCODE_2 },
+    { "Digit3",         SAPP_KEYCODE_3 },
+    { "Digit4",         SAPP_KEYCODE_4 },
+    { "Digit5",         SAPP_KEYCODE_5 },
+    { "Digit6",         SAPP_KEYCODE_6 },
+    { "Digit7",         SAPP_KEYCODE_7 },
+    { "Digit8",         SAPP_KEYCODE_8 },
+    { "Digit9",         SAPP_KEYCODE_9 },
+    { "KeyA",           SAPP_KEYCODE_A },
+    { "KeyB",           SAPP_KEYCODE_B },
+    { "KeyC",           SAPP_KEYCODE_C },
+    { "KeyD",           SAPP_KEYCODE_D },
+    { "KeyE",           SAPP_KEYCODE_E },
+    { "KeyF",           SAPP_KEYCODE_F },
+    { "KeyG",           SAPP_KEYCODE_G },
+    { "KeyH",           SAPP_KEYCODE_H },
+    { "KeyI",           SAPP_KEYCODE_I },
+    { "KeyJ",           SAPP_KEYCODE_J },
+    { "KeyK",           SAPP_KEYCODE_K },
+    { "KeyL",           SAPP_KEYCODE_L },
+    { "KeyM",           SAPP_KEYCODE_M },
+    { "KeyN",           SAPP_KEYCODE_N },
+    { "KeyO",           SAPP_KEYCODE_O },
+    { "KeyP",           SAPP_KEYCODE_P },
+    { "KeyQ",           SAPP_KEYCODE_Q },
+    { "KeyR",           SAPP_KEYCODE_R },
+    { "KeyS",           SAPP_KEYCODE_S },
+    { "KeyT",           SAPP_KEYCODE_T },
+    { "KeyU",           SAPP_KEYCODE_U },
+    { "KeyV",           SAPP_KEYCODE_V },
+    { "KeyW",           SAPP_KEYCODE_W },
+    { "KeyX",           SAPP_KEYCODE_X },
+    { "KeyY",           SAPP_KEYCODE_Y },
+    { "KeyZ",           SAPP_KEYCODE_Z },
+    { "MetaLeft",       SAPP_KEYCODE_LEFT_SUPER },
+    { "MetaRight",      SAPP_KEYCODE_RIGHT_SUPER },
+    { "Numpad0",        SAPP_KEYCODE_KP_0 },
+    { "Numpad1",        SAPP_KEYCODE_KP_1 },
+    { "Numpad2",        SAPP_KEYCODE_KP_2 },
+    { "Numpad3",        SAPP_KEYCODE_KP_3 },
+    { "Numpad4",        SAPP_KEYCODE_KP_4 },
+    { "Numpad5",        SAPP_KEYCODE_KP_5 },
+    { "Numpad6",        SAPP_KEYCODE_KP_6 },
+    { "Numpad7",        SAPP_KEYCODE_KP_7 },
+    { "Numpad8",        SAPP_KEYCODE_KP_8 },
+    { "Numpad9",        SAPP_KEYCODE_KP_9 },
+    { "NumpadMultiply", SAPP_KEYCODE_KP_MULTIPLY },
+    { "NumpadAdd",      SAPP_KEYCODE_KP_ADD },
+    { "NumpadSubtract", SAPP_KEYCODE_KP_SUBTRACT },
+    { "NumpadDecimal",  SAPP_KEYCODE_KP_DECIMAL },
+    { "NumpadDivide",   SAPP_KEYCODE_KP_DIVIDE },
+    { "F1",             SAPP_KEYCODE_F1 },
+    { "F2",             SAPP_KEYCODE_F2 },
+    { "F3",             SAPP_KEYCODE_F3 },
+    { "F4",             SAPP_KEYCODE_F4 },
+    { "F5",             SAPP_KEYCODE_F5 },
+    { "F6",             SAPP_KEYCODE_F6 },
+    { "F7",             SAPP_KEYCODE_F7 },
+    { "F8",             SAPP_KEYCODE_F8 },
+    { "F9",             SAPP_KEYCODE_F9 },
+    { "F10",            SAPP_KEYCODE_F10 },
+    { "F11",            SAPP_KEYCODE_F11 },
+    { "F12",            SAPP_KEYCODE_F12 },
+    { "NumLock",        SAPP_KEYCODE_NUM_LOCK },
+    { "ScrollLock",     SAPP_KEYCODE_SCROLL_LOCK },
+    { "Semicolon",      SAPP_KEYCODE_SEMICOLON },
+    { "Equal",          SAPP_KEYCODE_EQUAL },
+    { "Comma",          SAPP_KEYCODE_COMMA },
+    { "Minus",          SAPP_KEYCODE_MINUS },
+    { "Period",         SAPP_KEYCODE_PERIOD },
+    { "Slash",          SAPP_KEYCODE_SLASH },
+    { "Backquote",      SAPP_KEYCODE_GRAVE_ACCENT },
+    { "BracketLeft",    SAPP_KEYCODE_LEFT_BRACKET },
+    { "Backslash",      SAPP_KEYCODE_BACKSLASH },
+    { "BracketRight",   SAPP_KEYCODE_RIGHT_BRACKET },
+    { "Quote",          SAPP_KEYCODE_GRAVE_ACCENT },    // FIXME: ???
+    { 0, SAPP_KEYCODE_INVALID },
+};
+
+_SOKOL_PRIVATE sapp_keycode _sapp_emsc_translate_key(const char* str) {
+    int i = 0;
+    const char* keystr;
+    while (( keystr = _sapp_emsc_keymap[i].str )) {
+        if (0 == strcmp(str, keystr)) {
+            return _sapp_emsc_keymap[i].code;
+        }
+        i += 1;
+    }
+    return SAPP_KEYCODE_INVALID;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_key_cb(int emsc_type, const EmscriptenKeyboardEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(user_data);
+    bool retval = true;
+    if (_sapp_events_enabled()) {
+        sapp_event_type type;
+        switch (emsc_type) {
+            case EMSCRIPTEN_EVENT_KEYDOWN:
+                type = SAPP_EVENTTYPE_KEY_DOWN;
+                break;
+            case EMSCRIPTEN_EVENT_KEYUP:
+                type = SAPP_EVENTTYPE_KEY_UP;
+                break;
+            case EMSCRIPTEN_EVENT_KEYPRESS:
+                type = SAPP_EVENTTYPE_CHAR;
+                break;
+            default:
+                type = SAPP_EVENTTYPE_INVALID;
+                break;
+        }
+        if (type != SAPP_EVENTTYPE_INVALID) {
+            bool send_keyup_followup = false;
+            _sapp_init_event(type);
+            _sapp.event.key_repeat = emsc_event->repeat;
+            _sapp.event.modifiers = _sapp_emsc_key_event_mods(emsc_event);
+            if (type == SAPP_EVENTTYPE_CHAR) {
+                // FIXME: this doesn't appear to work on Android Chrome
+                _sapp.event.char_code = emsc_event->charCode;
+                /* workaround to make Cmd+V work on Safari */
+                if ((emsc_event->metaKey) && (emsc_event->charCode == 118)) {
+                    retval = false;
+                }
+            }
+            else {
+                if (0 != emsc_event->code[0]) {
+                    // This code path is for desktop browsers which send untranslated 'physical' key code strings
+                    // (which is what we actually want for key events)
+                    _sapp.event.key_code = _sapp_emsc_translate_key(emsc_event->code);
+                } else {
+                    // This code path is for mobile browsers which only send localized key code
+                    // strings. Note that the translation will only work for a small subset
+                    // of localization-agnostic keys (like Enter, arrow keys, etc...), but
+                    // regular alpha-numeric keys will all result in an SAPP_KEYCODE_INVALID)
+                    _sapp.event.key_code = _sapp_emsc_translate_key(emsc_event->key);
+                }
+
+                /* Special hack for macOS: if the Super key is pressed, macOS doesn't
+                    send keyUp events. As a workaround, to prevent keys from
+                    "sticking", we'll send a keyup event following a keydown
+                    when the SUPER key is pressed
+                */
+                if ((type == SAPP_EVENTTYPE_KEY_DOWN) &&
+                    (_sapp.event.key_code != SAPP_KEYCODE_LEFT_SUPER) &&
+                    (_sapp.event.key_code != SAPP_KEYCODE_RIGHT_SUPER) &&
+                    (_sapp.event.modifiers & SAPP_MODIFIER_SUPER))
+                {
+                    send_keyup_followup = true;
+                }
+                // only forward keys to the browser (can further be suppressed by sapp_consume_event())
+                switch (_sapp.event.key_code) {
+                    case SAPP_KEYCODE_WORLD_1:
+                    case SAPP_KEYCODE_WORLD_2:
+                    case SAPP_KEYCODE_ESCAPE:
+                    case SAPP_KEYCODE_ENTER:
+                    case SAPP_KEYCODE_TAB:
+                    case SAPP_KEYCODE_BACKSPACE:
+                    case SAPP_KEYCODE_INSERT:
+                    case SAPP_KEYCODE_DELETE:
+                    case SAPP_KEYCODE_RIGHT:
+                    case SAPP_KEYCODE_LEFT:
+                    case SAPP_KEYCODE_DOWN:
+                    case SAPP_KEYCODE_UP:
+                    case SAPP_KEYCODE_PAGE_UP:
+                    case SAPP_KEYCODE_PAGE_DOWN:
+                    case SAPP_KEYCODE_HOME:
+                    case SAPP_KEYCODE_END:
+                    case SAPP_KEYCODE_CAPS_LOCK:
+                    case SAPP_KEYCODE_SCROLL_LOCK:
+                    case SAPP_KEYCODE_NUM_LOCK:
+                    case SAPP_KEYCODE_PRINT_SCREEN:
+                    case SAPP_KEYCODE_PAUSE:
+                    case SAPP_KEYCODE_F1:
+                    case SAPP_KEYCODE_F2:
+                    case SAPP_KEYCODE_F3:
+                    case SAPP_KEYCODE_F4:
+                    case SAPP_KEYCODE_F5:
+                    case SAPP_KEYCODE_F6:
+                    case SAPP_KEYCODE_F7:
+                    case SAPP_KEYCODE_F8:
+                    case SAPP_KEYCODE_F9:
+                    case SAPP_KEYCODE_F10:
+                    case SAPP_KEYCODE_F11:
+                    case SAPP_KEYCODE_F12:
+                    case SAPP_KEYCODE_F13:
+                    case SAPP_KEYCODE_F14:
+                    case SAPP_KEYCODE_F15:
+                    case SAPP_KEYCODE_F16:
+                    case SAPP_KEYCODE_F17:
+                    case SAPP_KEYCODE_F18:
+                    case SAPP_KEYCODE_F19:
+                    case SAPP_KEYCODE_F20:
+                    case SAPP_KEYCODE_F21:
+                    case SAPP_KEYCODE_F22:
+                    case SAPP_KEYCODE_F23:
+                    case SAPP_KEYCODE_F24:
+                    case SAPP_KEYCODE_F25:
+                    case SAPP_KEYCODE_LEFT_SHIFT:
+                    case SAPP_KEYCODE_LEFT_CONTROL:
+                    case SAPP_KEYCODE_LEFT_ALT:
+                    case SAPP_KEYCODE_LEFT_SUPER:
+                    case SAPP_KEYCODE_RIGHT_SHIFT:
+                    case SAPP_KEYCODE_RIGHT_CONTROL:
+                    case SAPP_KEYCODE_RIGHT_ALT:
+                    case SAPP_KEYCODE_RIGHT_SUPER:
+                    case SAPP_KEYCODE_MENU:
+                        /* consume the event */
+                        break;
+                    default:
+                        /* forward key to browser */
+                        retval = false;
+                        break;
+                }
+            }
+            if (_sapp_call_event(&_sapp.event)) {
+                // event was consumed via sapp_consume_event()
+                retval = true;
+            }
+            if (send_keyup_followup) {
+                _sapp.event.type = SAPP_EVENTTYPE_KEY_UP;
+                if (_sapp_call_event(&_sapp.event)) {
+                    retval = true;
+                }
+            }
+        }
+    }
+    _sapp_emsc_update_keyboard_state();
+    _sapp_emsc_update_mouse_lock_state();
+    return retval;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_touch_cb(int emsc_type, const EmscriptenTouchEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(user_data);
+    bool retval = true;
+    if (_sapp_events_enabled()) {
+        sapp_event_type type;
+        switch (emsc_type) {
+            case EMSCRIPTEN_EVENT_TOUCHSTART:
+                type = SAPP_EVENTTYPE_TOUCHES_BEGAN;
+                break;
+            case EMSCRIPTEN_EVENT_TOUCHMOVE:
+                type = SAPP_EVENTTYPE_TOUCHES_MOVED;
+                break;
+            case EMSCRIPTEN_EVENT_TOUCHEND:
+                type = SAPP_EVENTTYPE_TOUCHES_ENDED;
+                break;
+            case EMSCRIPTEN_EVENT_TOUCHCANCEL:
+                type = SAPP_EVENTTYPE_TOUCHES_CANCELLED;
+                break;
+            default:
+                type = SAPP_EVENTTYPE_INVALID;
+                retval = false;
+                break;
+        }
+        if (type != SAPP_EVENTTYPE_INVALID) {
+            _sapp_init_event(type);
+            _sapp.event.modifiers = _sapp_emsc_touch_event_mods(emsc_event);
+            _sapp.event.num_touches = emsc_event->numTouches;
+            if (_sapp.event.num_touches > SAPP_MAX_TOUCHPOINTS) {
+                _sapp.event.num_touches = SAPP_MAX_TOUCHPOINTS;
+            }
+            for (int i = 0; i < _sapp.event.num_touches; i++) {
+                const EmscriptenTouchPoint* src = &emsc_event->touches[i];
+                sapp_touchpoint* dst = &_sapp.event.touches[i];
+                dst->identifier = (uintptr_t)src->identifier;
+                dst->pos_x = src->targetX * _sapp.dpi_scale;
+                dst->pos_y = src->targetY * _sapp.dpi_scale;
+                dst->changed = src->isChanged;
+            }
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+    _sapp_emsc_update_keyboard_state();
+    return retval;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_focus_cb(int emsc_type, const EmscriptenFocusEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(emsc_type);
+    _SOKOL_UNUSED(emsc_event);
+    _SOKOL_UNUSED(user_data);
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_FOCUSED);
+        _sapp_call_event(&_sapp.event);
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_blur_cb(int emsc_type, const EmscriptenFocusEvent* emsc_event, void* user_data) {
+    _SOKOL_UNUSED(emsc_type);
+    _SOKOL_UNUSED(emsc_event);
+    _SOKOL_UNUSED(user_data);
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_UNFOCUSED);
+        _sapp_call_event(&_sapp.event);
+    }
+    return true;
+}
+
+#if defined(SOKOL_GLES3)
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_webgl_context_cb(int emsc_type, const void* reserved, void* user_data) {
+    _SOKOL_UNUSED(reserved);
+    _SOKOL_UNUSED(user_data);
+    sapp_event_type type;
+    switch (emsc_type) {
+        case EMSCRIPTEN_EVENT_WEBGLCONTEXTLOST:     type = SAPP_EVENTTYPE_SUSPENDED; break;
+        case EMSCRIPTEN_EVENT_WEBGLCONTEXTRESTORED: type = SAPP_EVENTTYPE_RESUMED; break;
+        default:                                    type = SAPP_EVENTTYPE_INVALID; break;
+    }
+    if (_sapp_events_enabled() && (SAPP_EVENTTYPE_INVALID != type)) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE void _sapp_emsc_webgl_init(void) {
+    EmscriptenWebGLContextAttributes attrs;
+    emscripten_webgl_init_context_attributes(&attrs);
+    attrs.alpha = _sapp.desc.alpha;
+    attrs.depth = true;
+    attrs.stencil = true;
+    attrs.antialias = _sapp.sample_count > 1;
+    attrs.premultipliedAlpha = _sapp.desc.html5_premultiplied_alpha;
+    attrs.preserveDrawingBuffer = _sapp.desc.html5_preserve_drawing_buffer;
+    attrs.enableExtensionsByDefault = true;
+    attrs.majorVersion = 2;
+    EMSCRIPTEN_WEBGL_CONTEXT_HANDLE ctx = emscripten_webgl_create_context(_sapp.html5_canvas_selector, &attrs);
+    // FIXME: error message?
+    emscripten_webgl_make_context_current(ctx);
+
+    /* some WebGL extension are not enabled automatically by emscripten */
+    emscripten_webgl_enable_extension(ctx, "WEBKIT_WEBGL_compressed_texture_pvrtc");
+}
+#endif
+
+#if defined(SOKOL_WGPU)
+#define _SAPP_EMSC_WGPU_STATE_INITIAL (0)
+#define _SAPP_EMSC_WGPU_STATE_READY (1)
+#define _SAPP_EMSC_WGPU_STATE_RUNNING (2)
+
+#if defined(__cplusplus)
+extern "C" {
+#endif
+/* called when the asynchronous WebGPU device + swapchain init code in JS has finished */
+EMSCRIPTEN_KEEPALIVE void _sapp_emsc_wgpu_ready(int device_id, int swapchain_id, int swapchain_fmt) {
+    SOKOL_ASSERT(0 == _sapp.emsc.wgpu.device);
+    _sapp.emsc.wgpu.device = (WGPUDevice) device_id;
+    _sapp.emsc.wgpu.swapchain = (WGPUSwapChain) swapchain_id;
+    _sapp.emsc.wgpu.render_format = (WGPUTextureFormat) swapchain_fmt;
+    _sapp.emsc.wgpu.state = _SAPP_EMSC_WGPU_STATE_READY;
+}
+#if defined(__cplusplus)
+} // extern "C"
+#endif
+
+/* embedded JS function to handle all the asynchronous WebGPU setup */
+EM_JS(void, sapp_js_wgpu_init, (), {
+    WebGPU.initManagers();
+    // FIXME: the extension activation must be more clever here
+    navigator.gpu.requestAdapter().then((adapter) => {
+        console.log("wgpu adapter extensions: " + adapter.extensions);
+        adapter.requestDevice({ extensions: ["textureCompressionBC"]}).then((device) => {
+            var gpuContext = document.getElementById("canvas").getContext("gpupresent");
+            console.log("wgpu device extensions: " + adapter.extensions);
+            gpuContext.getSwapChainPreferredFormat(device).then((fmt) => {
+                const swapChainDescriptor = { device: device, format: fmt };
+                const swapChain = gpuContext.configureSwapChain(swapChainDescriptor);
+                const deviceId = WebGPU.mgrDevice.create(device);
+                const swapChainId = WebGPU.mgrSwapChain.create(swapChain);
+                const fmtId = WebGPU.TextureFormat.findIndex(function(elm) { return elm==fmt; });
+                console.log("wgpu device: " + device);
+                console.log("wgpu swap chain: " + swapChain);
+                console.log("wgpu preferred format: " + fmt + " (" + fmtId + ")");
+                __sapp_emsc_wgpu_ready(deviceId, swapChainId, fmtId);
+            });
+        });
+    });
+});
+
+_SOKOL_PRIVATE void _sapp_emsc_wgpu_surfaces_create(void) {
+    SOKOL_ASSERT(_sapp.emsc.wgpu.device);
+    SOKOL_ASSERT(_sapp.emsc.wgpu.swapchain);
+    SOKOL_ASSERT(0 == _sapp.emsc.wgpu.depth_stencil_tex);
+    SOKOL_ASSERT(0 == _sapp.emsc.wgpu.depth_stencil_view);
+    SOKOL_ASSERT(0 == _sapp.emsc.wgpu.msaa_tex);
+    SOKOL_ASSERT(0 == _sapp.emsc.wgpu.msaa_view);
+
+    WGPUTextureDescriptor ds_desc;
+    _sapp_clear(&ds_desc, sizeof(ds_desc));
+    ds_desc.usage = WGPUTextureUsage_OutputAttachment;
+    ds_desc.dimension = WGPUTextureDimension_2D;
+    ds_desc.size.width = (uint32_t) _sapp.framebuffer_width;
+    ds_desc.size.height = (uint32_t) _sapp.framebuffer_height;
+    ds_desc.size.depth = 1;
+    ds_desc.arrayLayerCount = 1;
+    ds_desc.format = WGPUTextureFormat_Depth24PlusStencil8;
+    ds_desc.mipLevelCount = 1;
+    ds_desc.sampleCount = _sapp.sample_count;
+    _sapp.emsc.wgpu.depth_stencil_tex = wgpuDeviceCreateTexture(_sapp.emsc.wgpu.device, &ds_desc);
+    _sapp.emsc.wgpu.depth_stencil_view = wgpuTextureCreateView(_sapp.emsc.wgpu.depth_stencil_tex, 0);
+
+    if (_sapp.sample_count > 1) {
+        WGPUTextureDescriptor msaa_desc;
+        _sapp_clear(&msaa_desc, sizeof(msaa_desc));
+        msaa_desc.usage = WGPUTextureUsage_OutputAttachment;
+        msaa_desc.dimension = WGPUTextureDimension_2D;
+        msaa_desc.size.width = (uint32_t) _sapp.framebuffer_width;
+        msaa_desc.size.height = (uint32_t) _sapp.framebuffer_height;
+        msaa_desc.size.depth = 1;
+        msaa_desc.arrayLayerCount = 1;
+        msaa_desc.format = _sapp.emsc.wgpu.render_format;
+        msaa_desc.mipLevelCount = 1;
+        msaa_desc.sampleCount = _sapp.sample_count;
+        _sapp.emsc.wgpu.msaa_tex = wgpuDeviceCreateTexture(_sapp.emsc.wgpu.device, &msaa_desc);
+        _sapp.emsc.wgpu.msaa_view = wgpuTextureCreateView(_sapp.emsc.wgpu.msaa_tex, 0);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_emsc_wgpu_surfaces_discard(void) {
+    if (_sapp.emsc.wgpu.msaa_tex) {
+        wgpuTextureRelease(_sapp.emsc.wgpu.msaa_tex);
+        _sapp.emsc.wgpu.msaa_tex = 0;
+    }
+    if (_sapp.emsc.wgpu.msaa_view) {
+        wgpuTextureViewRelease(_sapp.emsc.wgpu.msaa_view);
+        _sapp.emsc.wgpu.msaa_view = 0;
+    }
+    if (_sapp.emsc.wgpu.depth_stencil_tex) {
+        wgpuTextureRelease(_sapp.emsc.wgpu.depth_stencil_tex);
+        _sapp.emsc.wgpu.depth_stencil_tex = 0;
+    }
+    if (_sapp.emsc.wgpu.depth_stencil_view) {
+        wgpuTextureViewRelease(_sapp.emsc.wgpu.depth_stencil_view);
+        _sapp.emsc.wgpu.depth_stencil_view = 0;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_emsc_wgpu_next_frame(void) {
+    if (_sapp.emsc.wgpu.swapchain_view) {
+        wgpuTextureViewRelease(_sapp.emsc.wgpu.swapchain_view);
+    }
+    _sapp.emsc.wgpu.swapchain_view = wgpuSwapChainGetCurrentTextureView(_sapp.emsc.wgpu.swapchain);
+}
+#endif
+
+_SOKOL_PRIVATE void _sapp_emsc_register_eventhandlers(void) {
+    emscripten_set_mousedown_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_mouse_cb);
+    emscripten_set_mouseup_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_mouse_cb);
+    emscripten_set_mousemove_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_mouse_cb);
+    emscripten_set_mouseenter_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_mouse_cb);
+    emscripten_set_mouseleave_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_mouse_cb);
+    emscripten_set_wheel_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_wheel_cb);
+    emscripten_set_keydown_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, _sapp_emsc_key_cb);
+    emscripten_set_keyup_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, _sapp_emsc_key_cb);
+    emscripten_set_keypress_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, _sapp_emsc_key_cb);
+    emscripten_set_touchstart_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_touch_cb);
+    emscripten_set_touchmove_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_touch_cb);
+    emscripten_set_touchend_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_touch_cb);
+    emscripten_set_touchcancel_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_touch_cb);
+    emscripten_set_pointerlockchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, 0, true, _sapp_emsc_pointerlockchange_cb);
+    emscripten_set_pointerlockerror_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, 0, true, _sapp_emsc_pointerlockerror_cb);
+    emscripten_set_focus_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, _sapp_emsc_focus_cb);
+    emscripten_set_blur_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, _sapp_emsc_blur_cb);
+    sapp_js_add_beforeunload_listener();
+    if (_sapp.clipboard.enabled) {
+        sapp_js_add_clipboard_listener();
+    }
+    if (_sapp.drop.enabled) {
+        sapp_js_add_dragndrop_listeners(&_sapp.html5_canvas_selector[1]);
+    }
+    #if defined(SOKOL_GLES3)
+        emscripten_set_webglcontextlost_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_webgl_context_cb);
+        emscripten_set_webglcontextrestored_callback(_sapp.html5_canvas_selector, 0, true, _sapp_emsc_webgl_context_cb);
+    #endif
+}
+
+_SOKOL_PRIVATE void _sapp_emsc_unregister_eventhandlers() {
+    emscripten_set_mousedown_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_mouseup_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_mousemove_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_mouseenter_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_mouseleave_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_wheel_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_keydown_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, 0);
+    emscripten_set_keyup_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, 0);
+    emscripten_set_keypress_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, 0);
+    emscripten_set_touchstart_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_touchmove_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_touchend_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_touchcancel_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    emscripten_set_pointerlockchange_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, 0, true, 0);
+    emscripten_set_pointerlockerror_callback(EMSCRIPTEN_EVENT_TARGET_DOCUMENT, 0, true, 0);
+    emscripten_set_focus_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, 0);
+    emscripten_set_blur_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, true, 0);
+    sapp_js_remove_beforeunload_listener();
+    if (_sapp.clipboard.enabled) {
+        sapp_js_remove_clipboard_listener();
+    }
+    if (_sapp.drop.enabled) {
+        sapp_js_remove_dragndrop_listeners(&_sapp.html5_canvas_selector[1]);
+    }
+    #if defined(SOKOL_GLES3)
+        emscripten_set_webglcontextlost_callback(_sapp.html5_canvas_selector, 0, true, 0);
+        emscripten_set_webglcontextrestored_callback(_sapp.html5_canvas_selector, 0, true, 0);
+    #endif
+}
+
+_SOKOL_PRIVATE EM_BOOL _sapp_emsc_frame(double time, void* userData) {
+    _SOKOL_UNUSED(userData);
+    _sapp_timing_external(&_sapp.timing, time / 1000.0);
+
+    #if defined(SOKOL_WGPU)
+        /*
+            on WebGPU, the emscripten frame callback will already be called while
+            the asynchronous WebGPU device and swapchain initialization is still
+            in progress
+        */
+        switch (_sapp.emsc.wgpu.state) {
+            case _SAPP_EMSC_WGPU_STATE_INITIAL:
+                /* async JS init hasn't finished yet */
+                break;
+            case _SAPP_EMSC_WGPU_STATE_READY:
+                /* perform post-async init stuff */
+                _sapp_emsc_wgpu_surfaces_create();
+                _sapp.emsc.wgpu.state = _SAPP_EMSC_WGPU_STATE_RUNNING;
+                break;
+            case _SAPP_EMSC_WGPU_STATE_RUNNING:
+                /* a regular frame */
+                _sapp_emsc_wgpu_next_frame();
+                _sapp_frame();
+                break;
+        }
+    #else
+        /* WebGL code path */
+        _sapp_frame();
+    #endif
+
+    /* quit-handling */
+    if (_sapp.quit_requested) {
+        _sapp_init_event(SAPP_EVENTTYPE_QUIT_REQUESTED);
+        _sapp_call_event(&_sapp.event);
+        if (_sapp.quit_requested) {
+            _sapp.quit_ordered = true;
+        }
+    }
+    if (_sapp.quit_ordered) {
+        _sapp_emsc_unregister_eventhandlers();
+        _sapp_call_cleanup();
+        _sapp_discard_state();
+        return EM_FALSE;
+    }
+    return EM_TRUE;
+}
+
+_SOKOL_PRIVATE void _sapp_emsc_run(const sapp_desc* desc) {
+    _sapp_init_state(desc);
+    sapp_js_init(&_sapp.html5_canvas_selector[1]);
+    double w, h;
+    if (_sapp.desc.html5_canvas_resize) {
+        w = (double) _sapp_def(_sapp.desc.width, _SAPP_FALLBACK_DEFAULT_WINDOW_WIDTH);
+        h = (double) _sapp_def(_sapp.desc.height, _SAPP_FALLBACK_DEFAULT_WINDOW_HEIGHT);
+    }
+    else {
+        emscripten_get_element_css_size(_sapp.html5_canvas_selector, &w, &h);
+        emscripten_set_resize_callback(EMSCRIPTEN_EVENT_TARGET_WINDOW, 0, false, _sapp_emsc_size_changed);
+    }
+    if (_sapp.desc.high_dpi) {
+        _sapp.dpi_scale = emscripten_get_device_pixel_ratio();
+    }
+    _sapp.window_width = (int)roundf(w);
+    _sapp.window_height = (int)roundf(h);
+    _sapp.framebuffer_width = (int)roundf(w * _sapp.dpi_scale);
+    _sapp.framebuffer_height = (int)roundf(h * _sapp.dpi_scale);
+    emscripten_set_canvas_element_size(_sapp.html5_canvas_selector, _sapp.framebuffer_width, _sapp.framebuffer_height);
+    #if defined(SOKOL_GLES3)
+        _sapp_emsc_webgl_init();
+    #elif defined(SOKOL_WGPU)
+        sapp_js_wgpu_init();
+    #endif
+    _sapp.valid = true;
+    _sapp_emsc_register_eventhandlers();
+    sapp_set_icon(&desc->icon);
+
+    /* start the frame loop */
+    emscripten_request_animation_frame_loop(_sapp_emsc_frame, 0);
+
+    /* NOT A BUG: do not call _sapp_discard_state() here, instead this is
+       called in _sapp_emsc_frame() when the application is ordered to quit
+     */
+}
+
+#if !defined(SOKOL_NO_ENTRY)
+int main(int argc, char* argv[]) {
+    sapp_desc desc = sokol_main(argc, argv);
+    _sapp_emsc_run(&desc);
+    return 0;
+}
+#endif /* SOKOL_NO_ENTRY */
+#endif /* _SAPP_EMSCRIPTEN */
+
+//  ██████  ██          ██   ██ ███████ ██      ██████  ███████ ██████  ███████
+// ██       ██          ██   ██ ██      ██      ██   ██ ██      ██   ██ ██
+// ██   ███ ██          ███████ █████   ██      ██████  █████   ██████  ███████
+// ██    ██ ██          ██   ██ ██      ██      ██      ██      ██   ██      ██
+//  ██████  ███████     ██   ██ ███████ ███████ ██      ███████ ██   ██ ███████
+//
+// >>gl helpers
+#if defined(SOKOL_GLCORE33)
+typedef struct {
+    int         red_bits;
+    int         green_bits;
+    int         blue_bits;
+    int         alpha_bits;
+    int         depth_bits;
+    int         stencil_bits;
+    int         samples;
+    bool        doublebuffer;
+    uintptr_t   handle;
+} _sapp_gl_fbconfig;
+
+_SOKOL_PRIVATE void _sapp_gl_init_fbconfig(_sapp_gl_fbconfig* fbconfig) {
+    _sapp_clear(fbconfig, sizeof(_sapp_gl_fbconfig));
+    /* -1 means "don't care" */
+    fbconfig->red_bits = -1;
+    fbconfig->green_bits = -1;
+    fbconfig->blue_bits = -1;
+    fbconfig->alpha_bits = -1;
+    fbconfig->depth_bits = -1;
+    fbconfig->stencil_bits = -1;
+    fbconfig->samples = -1;
+}
+
+_SOKOL_PRIVATE const _sapp_gl_fbconfig* _sapp_gl_choose_fbconfig(const _sapp_gl_fbconfig* desired, const _sapp_gl_fbconfig* alternatives, int count) {
+    int missing, least_missing = 1000000;
+    int color_diff, least_color_diff = 10000000;
+    int extra_diff, least_extra_diff = 10000000;
+    const _sapp_gl_fbconfig* current;
+    const _sapp_gl_fbconfig* closest = 0;
+    for (int i = 0;  i < count;  i++) {
+        current = alternatives + i;
+        if (desired->doublebuffer != current->doublebuffer) {
+            continue;
+        }
+        missing = 0;
+        if (desired->alpha_bits > 0 && current->alpha_bits == 0) {
+            missing++;
+        }
+        if (desired->depth_bits > 0 && current->depth_bits == 0) {
+            missing++;
+        }
+        if (desired->stencil_bits > 0 && current->stencil_bits == 0) {
+            missing++;
+        }
+        if (desired->samples > 0 && current->samples == 0) {
+            /* Technically, several multisampling buffers could be
+                involved, but that's a lower level implementation detail and
+                not important to us here, so we count them as one
+            */
+            missing++;
+        }
+
+        /* These polynomials make many small channel size differences matter
+            less than one large channel size difference
+            Calculate color channel size difference value
+        */
+        color_diff = 0;
+        if (desired->red_bits != -1) {
+            color_diff += (desired->red_bits - current->red_bits) * (desired->red_bits - current->red_bits);
+        }
+        if (desired->green_bits != -1) {
+            color_diff += (desired->green_bits - current->green_bits) * (desired->green_bits - current->green_bits);
+        }
+        if (desired->blue_bits != -1) {
+            color_diff += (desired->blue_bits - current->blue_bits) * (desired->blue_bits - current->blue_bits);
+        }
+
+        /* Calculate non-color channel size difference value */
+        extra_diff = 0;
+        if (desired->alpha_bits != -1) {
+            extra_diff += (desired->alpha_bits - current->alpha_bits) * (desired->alpha_bits - current->alpha_bits);
+        }
+        if (desired->depth_bits != -1) {
+            extra_diff += (desired->depth_bits - current->depth_bits) * (desired->depth_bits - current->depth_bits);
+        }
+        if (desired->stencil_bits != -1) {
+            extra_diff += (desired->stencil_bits - current->stencil_bits) * (desired->stencil_bits - current->stencil_bits);
+        }
+        if (desired->samples != -1) {
+            extra_diff += (desired->samples - current->samples) * (desired->samples - current->samples);
+        }
+
+        /* Figure out if the current one is better than the best one found so far
+            Least number of missing buffers is the most important heuristic,
+            then color buffer size match and lastly size match for other buffers
+        */
+        if (missing < least_missing) {
+            closest = current;
+        }
+        else if (missing == least_missing) {
+            if ((color_diff < least_color_diff) ||
+                (color_diff == least_color_diff && extra_diff < least_extra_diff))
+            {
+                closest = current;
+            }
+        }
+        if (current == closest) {
+            least_missing = missing;
+            least_color_diff = color_diff;
+            least_extra_diff = extra_diff;
+        }
+    }
+    return closest;
+}
+#endif
+
+// ██     ██ ██ ███    ██ ██████   ██████  ██     ██ ███████
+// ██     ██ ██ ████   ██ ██   ██ ██    ██ ██     ██ ██
+// ██  █  ██ ██ ██ ██  ██ ██   ██ ██    ██ ██  █  ██ ███████
+// ██ ███ ██ ██ ██  ██ ██ ██   ██ ██    ██ ██ ███ ██      ██
+//  ███ ███  ██ ██   ████ ██████   ██████   ███ ███  ███████
+//
+// >>windows
+#if defined(_SAPP_WIN32)
+_SOKOL_PRIVATE bool _sapp_win32_utf8_to_wide(const char* src, wchar_t* dst, int dst_num_bytes) {
+    SOKOL_ASSERT(src && dst && (dst_num_bytes > 1));
+    _sapp_clear(dst, (size_t)dst_num_bytes);
+    const int dst_chars = dst_num_bytes / (int)sizeof(wchar_t);
+    const int dst_needed = MultiByteToWideChar(CP_UTF8, 0, src, -1, 0, 0);
+    if ((dst_needed > 0) && (dst_needed < dst_chars)) {
+        MultiByteToWideChar(CP_UTF8, 0, src, -1, dst, dst_chars);
+        return true;
+    }
+    else {
+        /* input string doesn't fit into destination buffer */
+        return false;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_app_event(sapp_event_type type) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_init_keytable(void) {
+    /* same as GLFW */
+    _sapp.keycodes[0x00B] = SAPP_KEYCODE_0;
+    _sapp.keycodes[0x002] = SAPP_KEYCODE_1;
+    _sapp.keycodes[0x003] = SAPP_KEYCODE_2;
+    _sapp.keycodes[0x004] = SAPP_KEYCODE_3;
+    _sapp.keycodes[0x005] = SAPP_KEYCODE_4;
+    _sapp.keycodes[0x006] = SAPP_KEYCODE_5;
+    _sapp.keycodes[0x007] = SAPP_KEYCODE_6;
+    _sapp.keycodes[0x008] = SAPP_KEYCODE_7;
+    _sapp.keycodes[0x009] = SAPP_KEYCODE_8;
+    _sapp.keycodes[0x00A] = SAPP_KEYCODE_9;
+    _sapp.keycodes[0x01E] = SAPP_KEYCODE_A;
+    _sapp.keycodes[0x030] = SAPP_KEYCODE_B;
+    _sapp.keycodes[0x02E] = SAPP_KEYCODE_C;
+    _sapp.keycodes[0x020] = SAPP_KEYCODE_D;
+    _sapp.keycodes[0x012] = SAPP_KEYCODE_E;
+    _sapp.keycodes[0x021] = SAPP_KEYCODE_F;
+    _sapp.keycodes[0x022] = SAPP_KEYCODE_G;
+    _sapp.keycodes[0x023] = SAPP_KEYCODE_H;
+    _sapp.keycodes[0x017] = SAPP_KEYCODE_I;
+    _sapp.keycodes[0x024] = SAPP_KEYCODE_J;
+    _sapp.keycodes[0x025] = SAPP_KEYCODE_K;
+    _sapp.keycodes[0x026] = SAPP_KEYCODE_L;
+    _sapp.keycodes[0x032] = SAPP_KEYCODE_M;
+    _sapp.keycodes[0x031] = SAPP_KEYCODE_N;
+    _sapp.keycodes[0x018] = SAPP_KEYCODE_O;
+    _sapp.keycodes[0x019] = SAPP_KEYCODE_P;
+    _sapp.keycodes[0x010] = SAPP_KEYCODE_Q;
+    _sapp.keycodes[0x013] = SAPP_KEYCODE_R;
+    _sapp.keycodes[0x01F] = SAPP_KEYCODE_S;
+    _sapp.keycodes[0x014] = SAPP_KEYCODE_T;
+    _sapp.keycodes[0x016] = SAPP_KEYCODE_U;
+    _sapp.keycodes[0x02F] = SAPP_KEYCODE_V;
+    _sapp.keycodes[0x011] = SAPP_KEYCODE_W;
+    _sapp.keycodes[0x02D] = SAPP_KEYCODE_X;
+    _sapp.keycodes[0x015] = SAPP_KEYCODE_Y;
+    _sapp.keycodes[0x02C] = SAPP_KEYCODE_Z;
+    _sapp.keycodes[0x028] = SAPP_KEYCODE_APOSTROPHE;
+    _sapp.keycodes[0x02B] = SAPP_KEYCODE_BACKSLASH;
+    _sapp.keycodes[0x033] = SAPP_KEYCODE_COMMA;
+    _sapp.keycodes[0x00D] = SAPP_KEYCODE_EQUAL;
+    _sapp.keycodes[0x029] = SAPP_KEYCODE_GRAVE_ACCENT;
+    _sapp.keycodes[0x01A] = SAPP_KEYCODE_LEFT_BRACKET;
+    _sapp.keycodes[0x00C] = SAPP_KEYCODE_MINUS;
+    _sapp.keycodes[0x034] = SAPP_KEYCODE_PERIOD;
+    _sapp.keycodes[0x01B] = SAPP_KEYCODE_RIGHT_BRACKET;
+    _sapp.keycodes[0x027] = SAPP_KEYCODE_SEMICOLON;
+    _sapp.keycodes[0x035] = SAPP_KEYCODE_SLASH;
+    _sapp.keycodes[0x056] = SAPP_KEYCODE_WORLD_2;
+    _sapp.keycodes[0x00E] = SAPP_KEYCODE_BACKSPACE;
+    _sapp.keycodes[0x153] = SAPP_KEYCODE_DELETE;
+    _sapp.keycodes[0x14F] = SAPP_KEYCODE_END;
+    _sapp.keycodes[0x01C] = SAPP_KEYCODE_ENTER;
+    _sapp.keycodes[0x001] = SAPP_KEYCODE_ESCAPE;
+    _sapp.keycodes[0x147] = SAPP_KEYCODE_HOME;
+    _sapp.keycodes[0x152] = SAPP_KEYCODE_INSERT;
+    _sapp.keycodes[0x15D] = SAPP_KEYCODE_MENU;
+    _sapp.keycodes[0x151] = SAPP_KEYCODE_PAGE_DOWN;
+    _sapp.keycodes[0x149] = SAPP_KEYCODE_PAGE_UP;
+    _sapp.keycodes[0x045] = SAPP_KEYCODE_PAUSE;
+    _sapp.keycodes[0x146] = SAPP_KEYCODE_PAUSE;
+    _sapp.keycodes[0x039] = SAPP_KEYCODE_SPACE;
+    _sapp.keycodes[0x00F] = SAPP_KEYCODE_TAB;
+    _sapp.keycodes[0x03A] = SAPP_KEYCODE_CAPS_LOCK;
+    _sapp.keycodes[0x145] = SAPP_KEYCODE_NUM_LOCK;
+    _sapp.keycodes[0x046] = SAPP_KEYCODE_SCROLL_LOCK;
+    _sapp.keycodes[0x03B] = SAPP_KEYCODE_F1;
+    _sapp.keycodes[0x03C] = SAPP_KEYCODE_F2;
+    _sapp.keycodes[0x03D] = SAPP_KEYCODE_F3;
+    _sapp.keycodes[0x03E] = SAPP_KEYCODE_F4;
+    _sapp.keycodes[0x03F] = SAPP_KEYCODE_F5;
+    _sapp.keycodes[0x040] = SAPP_KEYCODE_F6;
+    _sapp.keycodes[0x041] = SAPP_KEYCODE_F7;
+    _sapp.keycodes[0x042] = SAPP_KEYCODE_F8;
+    _sapp.keycodes[0x043] = SAPP_KEYCODE_F9;
+    _sapp.keycodes[0x044] = SAPP_KEYCODE_F10;
+    _sapp.keycodes[0x057] = SAPP_KEYCODE_F11;
+    _sapp.keycodes[0x058] = SAPP_KEYCODE_F12;
+    _sapp.keycodes[0x064] = SAPP_KEYCODE_F13;
+    _sapp.keycodes[0x065] = SAPP_KEYCODE_F14;
+    _sapp.keycodes[0x066] = SAPP_KEYCODE_F15;
+    _sapp.keycodes[0x067] = SAPP_KEYCODE_F16;
+    _sapp.keycodes[0x068] = SAPP_KEYCODE_F17;
+    _sapp.keycodes[0x069] = SAPP_KEYCODE_F18;
+    _sapp.keycodes[0x06A] = SAPP_KEYCODE_F19;
+    _sapp.keycodes[0x06B] = SAPP_KEYCODE_F20;
+    _sapp.keycodes[0x06C] = SAPP_KEYCODE_F21;
+    _sapp.keycodes[0x06D] = SAPP_KEYCODE_F22;
+    _sapp.keycodes[0x06E] = SAPP_KEYCODE_F23;
+    _sapp.keycodes[0x076] = SAPP_KEYCODE_F24;
+    _sapp.keycodes[0x038] = SAPP_KEYCODE_LEFT_ALT;
+    _sapp.keycodes[0x01D] = SAPP_KEYCODE_LEFT_CONTROL;
+    _sapp.keycodes[0x02A] = SAPP_KEYCODE_LEFT_SHIFT;
+    _sapp.keycodes[0x15B] = SAPP_KEYCODE_LEFT_SUPER;
+    _sapp.keycodes[0x137] = SAPP_KEYCODE_PRINT_SCREEN;
+    _sapp.keycodes[0x138] = SAPP_KEYCODE_RIGHT_ALT;
+    _sapp.keycodes[0x11D] = SAPP_KEYCODE_RIGHT_CONTROL;
+    _sapp.keycodes[0x036] = SAPP_KEYCODE_RIGHT_SHIFT;
+    _sapp.keycodes[0x15C] = SAPP_KEYCODE_RIGHT_SUPER;
+    _sapp.keycodes[0x150] = SAPP_KEYCODE_DOWN;
+    _sapp.keycodes[0x14B] = SAPP_KEYCODE_LEFT;
+    _sapp.keycodes[0x14D] = SAPP_KEYCODE_RIGHT;
+    _sapp.keycodes[0x148] = SAPP_KEYCODE_UP;
+    _sapp.keycodes[0x052] = SAPP_KEYCODE_KP_0;
+    _sapp.keycodes[0x04F] = SAPP_KEYCODE_KP_1;
+    _sapp.keycodes[0x050] = SAPP_KEYCODE_KP_2;
+    _sapp.keycodes[0x051] = SAPP_KEYCODE_KP_3;
+    _sapp.keycodes[0x04B] = SAPP_KEYCODE_KP_4;
+    _sapp.keycodes[0x04C] = SAPP_KEYCODE_KP_5;
+    _sapp.keycodes[0x04D] = SAPP_KEYCODE_KP_6;
+    _sapp.keycodes[0x047] = SAPP_KEYCODE_KP_7;
+    _sapp.keycodes[0x048] = SAPP_KEYCODE_KP_8;
+    _sapp.keycodes[0x049] = SAPP_KEYCODE_KP_9;
+    _sapp.keycodes[0x04E] = SAPP_KEYCODE_KP_ADD;
+    _sapp.keycodes[0x053] = SAPP_KEYCODE_KP_DECIMAL;
+    _sapp.keycodes[0x135] = SAPP_KEYCODE_KP_DIVIDE;
+    _sapp.keycodes[0x11C] = SAPP_KEYCODE_KP_ENTER;
+    _sapp.keycodes[0x037] = SAPP_KEYCODE_KP_MULTIPLY;
+    _sapp.keycodes[0x04A] = SAPP_KEYCODE_KP_SUBTRACT;
+}
+#endif // _SAPP_WIN32
+
+#if defined(_SAPP_WIN32)
+
+#if defined(SOKOL_D3D11)
+
+#if defined(__cplusplus)
+#define _sapp_d3d11_Release(self) (self)->Release()
+#define _sapp_win32_refiid(iid) iid
+#else
+#define _sapp_d3d11_Release(self) (self)->lpVtbl->Release(self)
+#define _sapp_win32_refiid(iid) &iid
+#endif
+
+#define _SAPP_SAFE_RELEASE(obj) if (obj) { _sapp_d3d11_Release(obj); obj=0; }
+
+
+static const IID _sapp_IID_ID3D11Texture2D = { 0x6f15aaf2,0xd208,0x4e89, {0x9a,0xb4,0x48,0x95,0x35,0xd3,0x4f,0x9c} };
+static const IID _sapp_IID_IDXGIDevice1    = { 0x77db970f,0x6276,0x48ba, {0xba,0x28,0x07,0x01,0x43,0xb4,0x39,0x2c} };
+static const IID _sapp_IID_IDXGIFactory    = { 0x7b7166ec,0x21c7,0x44ae, {0xb2,0x1a,0xc9,0xae,0x32,0x1a,0xe3,0x69} };
+
+static inline HRESULT _sapp_dxgi_GetBuffer(IDXGISwapChain* self, UINT Buffer, REFIID riid, void** ppSurface) {
+    #if defined(__cplusplus)
+        return self->GetBuffer(Buffer, riid, ppSurface);
+    #else
+        return self->lpVtbl->GetBuffer(self, Buffer, riid, ppSurface);
+    #endif
+}
+
+static inline HRESULT _sapp_d3d11_QueryInterface(ID3D11Device* self, REFIID riid, void** ppvObject) {
+    #if defined(__cplusplus)
+        return self->QueryInterface(riid, ppvObject);
+    #else
+        return self->lpVtbl->QueryInterface(self, riid, ppvObject);
+    #endif
+}
+
+static inline HRESULT _sapp_d3d11_CreateRenderTargetView(ID3D11Device* self, ID3D11Resource *pResource, const D3D11_RENDER_TARGET_VIEW_DESC* pDesc, ID3D11RenderTargetView** ppRTView) {
+    #if defined(__cplusplus)
+        return self->CreateRenderTargetView(pResource, pDesc, ppRTView);
+    #else
+        return self->lpVtbl->CreateRenderTargetView(self, pResource, pDesc, ppRTView);
+    #endif
+}
+
+static inline HRESULT _sapp_d3d11_CreateTexture2D(ID3D11Device* self, const D3D11_TEXTURE2D_DESC* pDesc, const D3D11_SUBRESOURCE_DATA* pInitialData, ID3D11Texture2D** ppTexture2D) {
+    #if defined(__cplusplus)
+        return self->CreateTexture2D(pDesc, pInitialData, ppTexture2D);
+    #else
+        return self->lpVtbl->CreateTexture2D(self, pDesc, pInitialData, ppTexture2D);
+    #endif
+}
+
+static inline HRESULT _sapp_d3d11_CreateDepthStencilView(ID3D11Device* self, ID3D11Resource* pResource, const D3D11_DEPTH_STENCIL_VIEW_DESC* pDesc, ID3D11DepthStencilView** ppDepthStencilView) {
+    #if defined(__cplusplus)
+        return self->CreateDepthStencilView(pResource, pDesc, ppDepthStencilView);
+    #else
+        return self->lpVtbl->CreateDepthStencilView(self, pResource, pDesc, ppDepthStencilView);
+    #endif
+}
+
+static inline void _sapp_d3d11_ResolveSubresource(ID3D11DeviceContext* self, ID3D11Resource* pDstResource, UINT DstSubresource, ID3D11Resource* pSrcResource, UINT SrcSubresource, DXGI_FORMAT Format) {
+    #if defined(__cplusplus)
+        self->ResolveSubresource(pDstResource, DstSubresource, pSrcResource, SrcSubresource, Format);
+    #else
+        self->lpVtbl->ResolveSubresource(self, pDstResource, DstSubresource, pSrcResource, SrcSubresource, Format);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_ResizeBuffers(IDXGISwapChain* self, UINT BufferCount, UINT Width, UINT Height, DXGI_FORMAT NewFormat, UINT SwapChainFlags) {
+    #if defined(__cplusplus)
+        return self->ResizeBuffers(BufferCount, Width, Height, NewFormat, SwapChainFlags);
+    #else
+        return self->lpVtbl->ResizeBuffers(self, BufferCount, Width, Height, NewFormat, SwapChainFlags);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_Present(IDXGISwapChain* self, UINT SyncInterval, UINT Flags) {
+    #if defined(__cplusplus)
+        return self->Present(SyncInterval, Flags);
+    #else
+        return self->lpVtbl->Present(self, SyncInterval, Flags);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_GetFrameStatistics(IDXGISwapChain* self, DXGI_FRAME_STATISTICS* pStats) {
+    #if defined(__cplusplus)
+        return self->GetFrameStatistics(pStats);
+    #else
+        return self->lpVtbl->GetFrameStatistics(self, pStats);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_SetMaximumFrameLatency(IDXGIDevice1* self, UINT MaxLatency) {
+    #if defined(__cplusplus)
+        return self->SetMaximumFrameLatency(MaxLatency);
+    #else
+        return self->lpVtbl->SetMaximumFrameLatency(self, MaxLatency);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_GetAdapter(IDXGIDevice1* self, IDXGIAdapter** pAdapter) {
+    #if defined(__cplusplus)
+        return self->GetAdapter(pAdapter);
+    #else
+        return self->lpVtbl->GetAdapter(self, pAdapter);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_GetParent(IDXGIObject* self, REFIID riid, void** ppParent) {
+    #if defined(__cplusplus)
+        return self->GetParent(riid, ppParent);
+    #else
+        return self->lpVtbl->GetParent(self, riid, ppParent);
+    #endif
+}
+
+static inline HRESULT _sapp_dxgi_MakeWindowAssociation(IDXGIFactory* self, HWND WindowHandle, UINT Flags) {
+    #if defined(__cplusplus)
+        return self->MakeWindowAssociation(WindowHandle, Flags);
+    #else
+        return self->lpVtbl->MakeWindowAssociation(self, WindowHandle, Flags);
+    #endif
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_create_device_and_swapchain(void) {
+    DXGI_SWAP_CHAIN_DESC* sc_desc = &_sapp.d3d11.swap_chain_desc;
+    sc_desc->BufferDesc.Width = (UINT)_sapp.framebuffer_width;
+    sc_desc->BufferDesc.Height = (UINT)_sapp.framebuffer_height;
+    sc_desc->BufferDesc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
+    sc_desc->BufferDesc.RefreshRate.Numerator = 60;
+    sc_desc->BufferDesc.RefreshRate.Denominator = 1;
+    sc_desc->OutputWindow = _sapp.win32.hwnd;
+    sc_desc->Windowed = true;
+    if (_sapp.win32.is_win10_or_greater) {
+        sc_desc->BufferCount = 2;
+        sc_desc->SwapEffect = (DXGI_SWAP_EFFECT) _SAPP_DXGI_SWAP_EFFECT_FLIP_DISCARD;
+        _sapp.d3d11.use_dxgi_frame_stats = true;
+    }
+    else {
+        sc_desc->BufferCount = 1;
+        sc_desc->SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
+        _sapp.d3d11.use_dxgi_frame_stats = false;
+    }
+    sc_desc->SampleDesc.Count = 1;
+    sc_desc->SampleDesc.Quality = 0;
+    sc_desc->BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
+    UINT create_flags = D3D11_CREATE_DEVICE_SINGLETHREADED | D3D11_CREATE_DEVICE_BGRA_SUPPORT;
+    #if defined(SOKOL_DEBUG)
+        create_flags |= D3D11_CREATE_DEVICE_DEBUG;
+    #endif
+    D3D_FEATURE_LEVEL feature_level;
+    HRESULT hr = D3D11CreateDeviceAndSwapChain(
+        NULL,                           /* pAdapter (use default) */
+        D3D_DRIVER_TYPE_HARDWARE,       /* DriverType */
+        NULL,                           /* Software */
+        create_flags,                   /* Flags */
+        NULL,                           /* pFeatureLevels */
+        0,                              /* FeatureLevels */
+        D3D11_SDK_VERSION,              /* SDKVersion */
+        sc_desc,                        /* pSwapChainDesc */
+        &_sapp.d3d11.swap_chain,        /* ppSwapChain */
+        &_sapp.d3d11.device,            /* ppDevice */
+        &feature_level,                 /* pFeatureLevel */
+        &_sapp.d3d11.device_context);   /* ppImmediateContext */
+    _SOKOL_UNUSED(hr);
+    #if defined(SOKOL_DEBUG)
+    if (!SUCCEEDED(hr)) {
+        // if initialization with D3D11_CREATE_DEVICE_DEBUG fails, this could be because the
+        // 'D3D11 debug layer' stopped working, indicated by the error message:
+        // ===
+        // D3D11CreateDevice: Flags (0x2) were specified which require the D3D11 SDK Layers for Windows 10, but they are not present on the system.
+        // These flags must be removed, or the Windows 10 SDK must be installed.
+        // Flags include: D3D11_CREATE_DEVICE_DEBUG
+        // ===
+        //
+        // ...just retry with the DEBUG flag switched off
+        _SAPP_ERROR(WIN32_D3D11_CREATE_DEVICE_AND_SWAPCHAIN_WITH_DEBUG_FAILED);
+        create_flags &= ~D3D11_CREATE_DEVICE_DEBUG;
+        hr = D3D11CreateDeviceAndSwapChain(
+            NULL,                           /* pAdapter (use default) */
+            D3D_DRIVER_TYPE_HARDWARE,       /* DriverType */
+            NULL,                           /* Software */
+            create_flags,                   /* Flags */
+            NULL,                           /* pFeatureLevels */
+            0,                              /* FeatureLevels */
+            D3D11_SDK_VERSION,              /* SDKVersion */
+            sc_desc,                        /* pSwapChainDesc */
+            &_sapp.d3d11.swap_chain,        /* ppSwapChain */
+            &_sapp.d3d11.device,            /* ppDevice */
+            &feature_level,                 /* pFeatureLevel */
+            &_sapp.d3d11.device_context);   /* ppImmediateContext */
+    }
+    #endif
+    SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.swap_chain && _sapp.d3d11.device && _sapp.d3d11.device_context);
+
+    // minimize frame latency, disable Alt-Enter
+    hr = _sapp_d3d11_QueryInterface(_sapp.d3d11.device, _sapp_win32_refiid(_sapp_IID_IDXGIDevice1), (void**)&_sapp.d3d11.dxgi_device);
+    if (SUCCEEDED(hr) && _sapp.d3d11.dxgi_device) {
+        _sapp_dxgi_SetMaximumFrameLatency(_sapp.d3d11.dxgi_device, 1);
+        IDXGIAdapter* dxgi_adapter = 0;
+        hr = _sapp_dxgi_GetAdapter(_sapp.d3d11.dxgi_device, &dxgi_adapter);
+        if (SUCCEEDED(hr) && dxgi_adapter) {
+            IDXGIFactory* dxgi_factory = 0;
+            hr = _sapp_dxgi_GetParent((IDXGIObject*)dxgi_adapter, _sapp_win32_refiid(_sapp_IID_IDXGIFactory), (void**)&dxgi_factory);
+            if (SUCCEEDED(hr)) {
+                _sapp_dxgi_MakeWindowAssociation(dxgi_factory, _sapp.win32.hwnd, DXGI_MWA_NO_ALT_ENTER|DXGI_MWA_NO_PRINT_SCREEN);
+                _SAPP_SAFE_RELEASE(dxgi_factory);
+            }
+            else {
+                _SAPP_ERROR(WIN32_D3D11_GET_IDXGIFACTORY_FAILED);
+            }
+            _SAPP_SAFE_RELEASE(dxgi_adapter);
+        }
+        else {
+            _SAPP_ERROR(WIN32_D3D11_GET_IDXGIADAPTER_FAILED);
+        }
+    }
+    else {
+        _SAPP_PANIC(WIN32_D3D11_QUERY_INTERFACE_IDXGIDEVICE1_FAILED);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_destroy_device_and_swapchain(void) {
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.swap_chain);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.dxgi_device);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.device_context);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.device);
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_create_default_render_target(void) {
+    SOKOL_ASSERT(0 == _sapp.d3d11.rt);
+    SOKOL_ASSERT(0 == _sapp.d3d11.rtv);
+    SOKOL_ASSERT(0 == _sapp.d3d11.msaa_rt);
+    SOKOL_ASSERT(0 == _sapp.d3d11.msaa_rtv);
+    SOKOL_ASSERT(0 == _sapp.d3d11.ds);
+    SOKOL_ASSERT(0 == _sapp.d3d11.dsv);
+
+    HRESULT hr;
+
+    /* view for the swapchain-created framebuffer */
+    hr = _sapp_dxgi_GetBuffer(_sapp.d3d11.swap_chain, 0, _sapp_win32_refiid(_sapp_IID_ID3D11Texture2D), (void**)&_sapp.d3d11.rt);
+    SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.rt);
+    hr = _sapp_d3d11_CreateRenderTargetView(_sapp.d3d11.device, (ID3D11Resource*)_sapp.d3d11.rt, NULL, &_sapp.d3d11.rtv);
+    SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.rtv);
+
+    /* common desc for MSAA and depth-stencil texture */
+    D3D11_TEXTURE2D_DESC tex_desc;
+    _sapp_clear(&tex_desc, sizeof(tex_desc));
+    tex_desc.Width = (UINT)_sapp.framebuffer_width;
+    tex_desc.Height = (UINT)_sapp.framebuffer_height;
+    tex_desc.MipLevels = 1;
+    tex_desc.ArraySize = 1;
+    tex_desc.Usage = D3D11_USAGE_DEFAULT;
+    tex_desc.BindFlags = D3D11_BIND_RENDER_TARGET;
+    tex_desc.SampleDesc.Count = (UINT) _sapp.sample_count;
+    tex_desc.SampleDesc.Quality = (UINT) (_sapp.sample_count > 1 ? D3D11_STANDARD_MULTISAMPLE_PATTERN : 0);
+
+    /* create MSAA texture and view if antialiasing requested */
+    if (_sapp.sample_count > 1) {
+        tex_desc.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
+        hr = _sapp_d3d11_CreateTexture2D(_sapp.d3d11.device, &tex_desc, NULL, &_sapp.d3d11.msaa_rt);
+        SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.msaa_rt);
+        hr = _sapp_d3d11_CreateRenderTargetView(_sapp.d3d11.device, (ID3D11Resource*)_sapp.d3d11.msaa_rt, NULL, &_sapp.d3d11.msaa_rtv);
+        SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.msaa_rtv);
+    }
+
+    /* texture and view for the depth-stencil-surface */
+    tex_desc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
+    tex_desc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
+    hr = _sapp_d3d11_CreateTexture2D(_sapp.d3d11.device, &tex_desc, NULL, &_sapp.d3d11.ds);
+    SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.ds);
+    hr = _sapp_d3d11_CreateDepthStencilView(_sapp.d3d11.device, (ID3D11Resource*)_sapp.d3d11.ds, NULL, &_sapp.d3d11.dsv);
+    SOKOL_ASSERT(SUCCEEDED(hr) && _sapp.d3d11.dsv);
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_destroy_default_render_target(void) {
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.rt);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.rtv);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.msaa_rt);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.msaa_rtv);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.ds);
+    _SAPP_SAFE_RELEASE(_sapp.d3d11.dsv);
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_resize_default_render_target(void) {
+    if (_sapp.d3d11.swap_chain) {
+        _sapp_d3d11_destroy_default_render_target();
+        _sapp_dxgi_ResizeBuffers(_sapp.d3d11.swap_chain, _sapp.d3d11.swap_chain_desc.BufferCount, (UINT)_sapp.framebuffer_width, (UINT)_sapp.framebuffer_height, DXGI_FORMAT_B8G8R8A8_UNORM, 0);
+        _sapp_d3d11_create_default_render_target();
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_d3d11_present(bool do_not_wait) {
+    /* do MSAA resolve if needed */
+    if (_sapp.sample_count > 1) {
+        SOKOL_ASSERT(_sapp.d3d11.rt);
+        SOKOL_ASSERT(_sapp.d3d11.msaa_rt);
+        _sapp_d3d11_ResolveSubresource(_sapp.d3d11.device_context, (ID3D11Resource*)_sapp.d3d11.rt, 0, (ID3D11Resource*)_sapp.d3d11.msaa_rt, 0, DXGI_FORMAT_B8G8R8A8_UNORM);
+    }
+    UINT flags = 0;
+    if (_sapp.win32.is_win10_or_greater && do_not_wait) {
+        /* this hack/workaround somewhat improves window-movement and -sizing
+            responsiveness when rendering is controlled via WM_TIMER during window
+            move and resize on NVIDIA cards on Win10 with recent drivers.
+        */
+        flags = DXGI_PRESENT_DO_NOT_WAIT;
+    }
+    _sapp_dxgi_Present(_sapp.d3d11.swap_chain, (UINT)_sapp.swap_interval, flags);
+}
+
+#endif /* SOKOL_D3D11 */
+
+#if defined(SOKOL_GLCORE33)
+_SOKOL_PRIVATE void _sapp_wgl_init(void) {
+    _sapp.wgl.opengl32 = LoadLibraryA("opengl32.dll");
+    if (!_sapp.wgl.opengl32) {
+        _SAPP_PANIC(WIN32_LOAD_OPENGL32_DLL_FAILED);
+    }
+    SOKOL_ASSERT(_sapp.wgl.opengl32);
+    _sapp.wgl.CreateContext = (PFN_wglCreateContext)(void*) GetProcAddress(_sapp.wgl.opengl32, "wglCreateContext");
+    SOKOL_ASSERT(_sapp.wgl.CreateContext);
+    _sapp.wgl.DeleteContext = (PFN_wglDeleteContext)(void*) GetProcAddress(_sapp.wgl.opengl32, "wglDeleteContext");
+    SOKOL_ASSERT(_sapp.wgl.DeleteContext);
+    _sapp.wgl.GetProcAddress = (PFN_wglGetProcAddress)(void*) GetProcAddress(_sapp.wgl.opengl32, "wglGetProcAddress");
+    SOKOL_ASSERT(_sapp.wgl.GetProcAddress);
+    _sapp.wgl.GetCurrentDC = (PFN_wglGetCurrentDC)(void*) GetProcAddress(_sapp.wgl.opengl32, "wglGetCurrentDC");
+    SOKOL_ASSERT(_sapp.wgl.GetCurrentDC);
+    _sapp.wgl.MakeCurrent = (PFN_wglMakeCurrent)(void*) GetProcAddress(_sapp.wgl.opengl32, "wglMakeCurrent");
+    SOKOL_ASSERT(_sapp.wgl.MakeCurrent);
+
+    _sapp.wgl.msg_hwnd = CreateWindowExW(WS_EX_OVERLAPPEDWINDOW,
+        L"SOKOLAPP",
+        L"sokol-app message window",
+        WS_CLIPSIBLINGS|WS_CLIPCHILDREN,
+        0, 0, 1, 1,
+        NULL, NULL,
+        GetModuleHandleW(NULL),
+        NULL);
+    if (!_sapp.wgl.msg_hwnd) {
+        _SAPP_PANIC(WIN32_CREATE_HELPER_WINDOW_FAILED);
+    }
+    SOKOL_ASSERT(_sapp.wgl.msg_hwnd);
+    ShowWindow(_sapp.wgl.msg_hwnd, SW_HIDE);
+    MSG msg;
+    while (PeekMessageW(&msg, _sapp.wgl.msg_hwnd, 0, 0, PM_REMOVE)) {
+        TranslateMessage(&msg);
+        DispatchMessageW(&msg);
+    }
+    _sapp.wgl.msg_dc = GetDC(_sapp.wgl.msg_hwnd);
+    if (!_sapp.wgl.msg_dc) {
+        _SAPP_PANIC(WIN32_HELPER_WINDOW_GETDC_FAILED);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_wgl_shutdown(void) {
+    SOKOL_ASSERT(_sapp.wgl.opengl32 && _sapp.wgl.msg_hwnd);
+    DestroyWindow(_sapp.wgl.msg_hwnd); _sapp.wgl.msg_hwnd = 0;
+    FreeLibrary(_sapp.wgl.opengl32); _sapp.wgl.opengl32 = 0;
+}
+
+_SOKOL_PRIVATE bool _sapp_wgl_has_ext(const char* ext, const char* extensions) {
+    SOKOL_ASSERT(ext && extensions);
+    const char* start = extensions;
+    while (true) {
+        const char* where = strstr(start, ext);
+        if (!where) {
+            return false;
+        }
+        const char* terminator = where + strlen(ext);
+        if ((where == start) || (*(where - 1) == ' ')) {
+            if (*terminator == ' ' || *terminator == '\0') {
+                break;
+            }
+        }
+        start = terminator;
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE bool _sapp_wgl_ext_supported(const char* ext) {
+    SOKOL_ASSERT(ext);
+    if (_sapp.wgl.GetExtensionsStringEXT) {
+        const char* extensions = _sapp.wgl.GetExtensionsStringEXT();
+        if (extensions) {
+            if (_sapp_wgl_has_ext(ext, extensions)) {
+                return true;
+            }
+        }
+    }
+    if (_sapp.wgl.GetExtensionsStringARB) {
+        const char* extensions = _sapp.wgl.GetExtensionsStringARB(_sapp.wgl.GetCurrentDC());
+        if (extensions) {
+            if (_sapp_wgl_has_ext(ext, extensions)) {
+                return true;
+            }
+        }
+    }
+    return false;
+}
+
+_SOKOL_PRIVATE void _sapp_wgl_load_extensions(void) {
+    SOKOL_ASSERT(_sapp.wgl.msg_dc);
+    PIXELFORMATDESCRIPTOR pfd;
+    _sapp_clear(&pfd, sizeof(pfd));
+    pfd.nSize = sizeof(pfd);
+    pfd.nVersion = 1;
+    pfd.dwFlags = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
+    pfd.iPixelType = PFD_TYPE_RGBA;
+    pfd.cColorBits = 24;
+    if (!SetPixelFormat(_sapp.wgl.msg_dc, ChoosePixelFormat(_sapp.wgl.msg_dc, &pfd), &pfd)) {
+        _SAPP_PANIC(WIN32_DUMMY_CONTEXT_SET_PIXELFORMAT_FAILED);
+    }
+    HGLRC rc = _sapp.wgl.CreateContext(_sapp.wgl.msg_dc);
+    if (!rc) {
+        _SAPP_PANIC(WIN32_CREATE_DUMMY_CONTEXT_FAILED);
+    }
+    if (!_sapp.wgl.MakeCurrent(_sapp.wgl.msg_dc, rc)) {
+        _SAPP_PANIC(WIN32_DUMMY_CONTEXT_MAKE_CURRENT_FAILED);
+    }
+    _sapp.wgl.GetExtensionsStringEXT = (PFNWGLGETEXTENSIONSSTRINGEXTPROC)(void*) _sapp.wgl.GetProcAddress("wglGetExtensionsStringEXT");
+    _sapp.wgl.GetExtensionsStringARB = (PFNWGLGETEXTENSIONSSTRINGARBPROC)(void*) _sapp.wgl.GetProcAddress("wglGetExtensionsStringARB");
+    _sapp.wgl.CreateContextAttribsARB = (PFNWGLCREATECONTEXTATTRIBSARBPROC)(void*) _sapp.wgl.GetProcAddress("wglCreateContextAttribsARB");
+    _sapp.wgl.SwapIntervalEXT = (PFNWGLSWAPINTERVALEXTPROC)(void*) _sapp.wgl.GetProcAddress("wglSwapIntervalEXT");
+    _sapp.wgl.GetPixelFormatAttribivARB = (PFNWGLGETPIXELFORMATATTRIBIVARBPROC)(void*) _sapp.wgl.GetProcAddress("wglGetPixelFormatAttribivARB");
+    _sapp.wgl.arb_multisample = _sapp_wgl_ext_supported("WGL_ARB_multisample");
+    _sapp.wgl.arb_create_context = _sapp_wgl_ext_supported("WGL_ARB_create_context");
+    _sapp.wgl.arb_create_context_profile = _sapp_wgl_ext_supported("WGL_ARB_create_context_profile");
+    _sapp.wgl.ext_swap_control = _sapp_wgl_ext_supported("WGL_EXT_swap_control");
+    _sapp.wgl.arb_pixel_format = _sapp_wgl_ext_supported("WGL_ARB_pixel_format");
+    _sapp.wgl.MakeCurrent(_sapp.wgl.msg_dc, 0);
+    _sapp.wgl.DeleteContext(rc);
+}
+
+_SOKOL_PRIVATE int _sapp_wgl_attrib(int pixel_format, int attrib) {
+    SOKOL_ASSERT(_sapp.wgl.arb_pixel_format);
+    int value = 0;
+    if (!_sapp.wgl.GetPixelFormatAttribivARB(_sapp.win32.dc, pixel_format, 0, 1, &attrib, &value)) {
+        _SAPP_PANIC(WIN32_GET_PIXELFORMAT_ATTRIB_FAILED);
+    }
+    return value;
+}
+
+_SOKOL_PRIVATE int _sapp_wgl_find_pixel_format(void) {
+    SOKOL_ASSERT(_sapp.win32.dc);
+    SOKOL_ASSERT(_sapp.wgl.arb_pixel_format);
+    const _sapp_gl_fbconfig* closest;
+
+    int native_count = _sapp_wgl_attrib(1, WGL_NUMBER_PIXEL_FORMATS_ARB);
+    _sapp_gl_fbconfig* usable_configs = (_sapp_gl_fbconfig*) _sapp_malloc_clear((size_t)native_count * sizeof(_sapp_gl_fbconfig));
+    SOKOL_ASSERT(usable_configs);
+    int usable_count = 0;
+    for (int i = 0; i < native_count; i++) {
+        const int n = i + 1;
+        _sapp_gl_fbconfig* u = usable_configs + usable_count;
+        _sapp_gl_init_fbconfig(u);
+        if (!_sapp_wgl_attrib(n, WGL_SUPPORT_OPENGL_ARB) || !_sapp_wgl_attrib(n, WGL_DRAW_TO_WINDOW_ARB)) {
+            continue;
+        }
+        if (_sapp_wgl_attrib(n, WGL_PIXEL_TYPE_ARB) != WGL_TYPE_RGBA_ARB) {
+            continue;
+        }
+        if (_sapp_wgl_attrib(n, WGL_ACCELERATION_ARB) == WGL_NO_ACCELERATION_ARB) {
+            continue;
+        }
+        u->red_bits     = _sapp_wgl_attrib(n, WGL_RED_BITS_ARB);
+        u->green_bits   = _sapp_wgl_attrib(n, WGL_GREEN_BITS_ARB);
+        u->blue_bits    = _sapp_wgl_attrib(n, WGL_BLUE_BITS_ARB);
+        u->alpha_bits   = _sapp_wgl_attrib(n, WGL_ALPHA_BITS_ARB);
+        u->depth_bits   = _sapp_wgl_attrib(n, WGL_DEPTH_BITS_ARB);
+        u->stencil_bits = _sapp_wgl_attrib(n, WGL_STENCIL_BITS_ARB);
+        if (_sapp_wgl_attrib(n, WGL_DOUBLE_BUFFER_ARB)) {
+            u->doublebuffer = true;
+        }
+        if (_sapp.wgl.arb_multisample) {
+            u->samples = _sapp_wgl_attrib(n, WGL_SAMPLES_ARB);
+        }
+        u->handle = (uintptr_t)n;
+        usable_count++;
+    }
+    SOKOL_ASSERT(usable_count > 0);
+    _sapp_gl_fbconfig desired;
+    _sapp_gl_init_fbconfig(&desired);
+    desired.red_bits = 8;
+    desired.green_bits = 8;
+    desired.blue_bits = 8;
+    desired.alpha_bits = 8;
+    desired.depth_bits = 24;
+    desired.stencil_bits = 8;
+    desired.doublebuffer = true;
+    desired.samples = _sapp.sample_count > 1 ? _sapp.sample_count : 0;
+    closest = _sapp_gl_choose_fbconfig(&desired, usable_configs, usable_count);
+    int pixel_format = 0;
+    if (closest) {
+        pixel_format = (int) closest->handle;
+    }
+    _sapp_free(usable_configs);
+    return pixel_format;
+}
+
+_SOKOL_PRIVATE void _sapp_wgl_create_context(void) {
+    int pixel_format = _sapp_wgl_find_pixel_format();
+    if (0 == pixel_format) {
+        _SAPP_PANIC(WIN32_WGL_FIND_PIXELFORMAT_FAILED);
+    }
+    PIXELFORMATDESCRIPTOR pfd;
+    if (!DescribePixelFormat(_sapp.win32.dc, pixel_format, sizeof(pfd), &pfd)) {
+        _SAPP_PANIC(WIN32_WGL_DESCRIBE_PIXELFORMAT_FAILED);
+    }
+    if (!SetPixelFormat(_sapp.win32.dc, pixel_format, &pfd)) {
+        _SAPP_PANIC(WIN32_WGL_SET_PIXELFORMAT_FAILED);
+    }
+    if (!_sapp.wgl.arb_create_context) {
+        _SAPP_PANIC(WIN32_WGL_ARB_CREATE_CONTEXT_REQUIRED);
+    }
+    if (!_sapp.wgl.arb_create_context_profile) {
+        _SAPP_PANIC(WIN32_WGL_ARB_CREATE_CONTEXT_PROFILE_REQUIRED);
+    }
+    const int attrs[] = {
+        WGL_CONTEXT_MAJOR_VERSION_ARB, _sapp.desc.gl_major_version,
+        WGL_CONTEXT_MINOR_VERSION_ARB, _sapp.desc.gl_minor_version,
+        WGL_CONTEXT_FLAGS_ARB, WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+        WGL_CONTEXT_PROFILE_MASK_ARB, WGL_CONTEXT_CORE_PROFILE_BIT_ARB,
+        0, 0
+    };
+    _sapp.wgl.gl_ctx = _sapp.wgl.CreateContextAttribsARB(_sapp.win32.dc, 0, attrs);
+    if (!_sapp.wgl.gl_ctx) {
+        const DWORD err = GetLastError();
+        if (err == (0xc0070000 | ERROR_INVALID_VERSION_ARB)) {
+            _SAPP_PANIC(WIN32_WGL_OPENGL_3_2_NOT_SUPPORTED);
+        }
+        else if (err == (0xc0070000 | ERROR_INVALID_PROFILE_ARB)) {
+            _SAPP_PANIC(WIN32_WGL_OPENGL_PROFILE_NOT_SUPPORTED);
+        }
+        else if (err == (0xc0070000 | ERROR_INCOMPATIBLE_DEVICE_CONTEXTS_ARB)) {
+            _SAPP_PANIC(WIN32_WGL_INCOMPATIBLE_DEVICE_CONTEXT);
+        }
+        else {
+            _SAPP_PANIC(WIN32_WGL_CREATE_CONTEXT_ATTRIBS_FAILED_OTHER);
+        }
+    }
+    _sapp.wgl.MakeCurrent(_sapp.win32.dc, _sapp.wgl.gl_ctx);
+    if (_sapp.wgl.ext_swap_control) {
+        /* FIXME: DwmIsCompositionEnabled() (see GLFW) */
+        _sapp.wgl.SwapIntervalEXT(_sapp.swap_interval);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_wgl_destroy_context(void) {
+    SOKOL_ASSERT(_sapp.wgl.gl_ctx);
+    _sapp.wgl.DeleteContext(_sapp.wgl.gl_ctx);
+    _sapp.wgl.gl_ctx = 0;
+}
+
+_SOKOL_PRIVATE void _sapp_wgl_swap_buffers(void) {
+    SOKOL_ASSERT(_sapp.win32.dc);
+    /* FIXME: DwmIsCompositionEnabled? (see GLFW) */
+    SwapBuffers(_sapp.win32.dc);
+}
+#endif /* SOKOL_GLCORE33 */
+
+_SOKOL_PRIVATE bool _sapp_win32_wide_to_utf8(const wchar_t* src, char* dst, int dst_num_bytes) {
+    SOKOL_ASSERT(src && dst && (dst_num_bytes > 1));
+    _sapp_clear(dst, (size_t)dst_num_bytes);
+    const int bytes_needed = WideCharToMultiByte(CP_UTF8, 0, src, -1, NULL, 0, NULL, NULL);
+    if (bytes_needed <= dst_num_bytes) {
+        WideCharToMultiByte(CP_UTF8, 0, src, -1, dst, dst_num_bytes, NULL, NULL);
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+/* updates current window and framebuffer size from the window's client rect, returns true if size has changed */
+_SOKOL_PRIVATE bool _sapp_win32_update_dimensions(void) {
+    RECT rect;
+    if (GetClientRect(_sapp.win32.hwnd, &rect)) {
+        float window_width = (float)(rect.right - rect.left) / _sapp.win32.dpi.window_scale;
+        float window_height = (float)(rect.bottom - rect.top) / _sapp.win32.dpi.window_scale;
+        _sapp.window_width = (int)roundf(window_width);
+        _sapp.window_height = (int)roundf(window_height);
+        int fb_width = (int)roundf(window_width * _sapp.win32.dpi.content_scale);
+        int fb_height = (int)roundf(window_height * _sapp.win32.dpi.content_scale);
+        /* prevent a framebuffer size of 0 when window is minimized */
+        if (0 == fb_width) {
+            fb_width = 1;
+        }
+        if (0 == fb_height) {
+            fb_height = 1;
+        }
+        if ((fb_width != _sapp.framebuffer_width) || (fb_height != _sapp.framebuffer_height)) {
+            _sapp.framebuffer_width = fb_width;
+            _sapp.framebuffer_height = fb_height;
+            return true;
+        }
+    }
+    else {
+        _sapp.window_width = _sapp.window_height = 1;
+        _sapp.framebuffer_width = _sapp.framebuffer_height = 1;
+    }
+    return false;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_set_fullscreen(bool fullscreen, UINT swp_flags) {
+    HMONITOR monitor = MonitorFromWindow(_sapp.win32.hwnd, MONITOR_DEFAULTTONEAREST);
+    MONITORINFO minfo;
+    _sapp_clear(&minfo, sizeof(minfo));
+    minfo.cbSize = sizeof(MONITORINFO);
+    GetMonitorInfo(monitor, &minfo);
+    const RECT mr = minfo.rcMonitor;
+    const int monitor_w = mr.right - mr.left;
+    const int monitor_h = mr.bottom - mr.top;
+
+    const DWORD win_ex_style = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
+    DWORD win_style;
+    RECT rect = { 0, 0, 0, 0 };
+
+    _sapp.fullscreen = fullscreen;
+    if (!_sapp.fullscreen) {
+        win_style = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SIZEBOX;
+        rect = _sapp.win32.stored_window_rect;
+    }
+    else {
+        GetWindowRect(_sapp.win32.hwnd, &_sapp.win32.stored_window_rect);
+        win_style = WS_POPUP | WS_SYSMENU | WS_VISIBLE;
+        rect.left = mr.left;
+        rect.top = mr.top;
+        rect.right = rect.left + monitor_w;
+        rect.bottom = rect.top + monitor_h;
+        AdjustWindowRectEx(&rect, win_style, FALSE, win_ex_style);
+    }
+    const int win_w = rect.right - rect.left;
+    const int win_h = rect.bottom - rect.top;
+    const int win_x = rect.left;
+    const int win_y = rect.top;
+    SetWindowLongPtr(_sapp.win32.hwnd, GWL_STYLE, win_style);
+    SetWindowPos(_sapp.win32.hwnd, HWND_TOP, win_x, win_y, win_w, win_h, swp_flags | SWP_FRAMECHANGED);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_toggle_fullscreen(void) {
+    _sapp_win32_set_fullscreen(!_sapp.fullscreen, SWP_SHOWWINDOW);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_init_cursor(sapp_mouse_cursor cursor) {
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    // NOTE: the OCR_* constants are only defined if OEMRESOURCE is defined
+    // before windows.h is included, but we can't guarantee that because
+    // the sokol_app.h implementation may be included with other implementations
+    // in the same compilation unit
+    int id = 0;
+    switch (cursor) {
+        case SAPP_MOUSECURSOR_ARROW:            id = 32512; break;  // OCR_NORMAL
+        case SAPP_MOUSECURSOR_IBEAM:            id = 32513; break;  // OCR_IBEAM
+        case SAPP_MOUSECURSOR_CROSSHAIR:        id = 32515; break;  // OCR_CROSS
+        case SAPP_MOUSECURSOR_POINTING_HAND:    id = 32649; break;  // OCR_HAND
+        case SAPP_MOUSECURSOR_RESIZE_EW:        id = 32644; break;  // OCR_SIZEWE
+        case SAPP_MOUSECURSOR_RESIZE_NS:        id = 32645; break;  // OCR_SIZENS
+        case SAPP_MOUSECURSOR_RESIZE_NWSE:      id = 32642; break;  // OCR_SIZENWSE
+        case SAPP_MOUSECURSOR_RESIZE_NESW:      id = 32643; break;  // OCR_SIZENESW
+        case SAPP_MOUSECURSOR_RESIZE_ALL:       id = 32646; break;  // OCR_SIZEALL
+        case SAPP_MOUSECURSOR_NOT_ALLOWED:      id = 32648; break;  // OCR_NO
+        default: break;
+    }
+    if (id != 0) {
+        _sapp.win32.cursors[cursor] = (HCURSOR)LoadImageW(NULL, MAKEINTRESOURCEW(id), IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE|LR_SHARED);
+    }
+    // fallback: default cursor
+    if (0 == _sapp.win32.cursors[cursor]) {
+        // 32512 => IDC_ARROW
+        _sapp.win32.cursors[cursor] = LoadCursorW(NULL, MAKEINTRESOURCEW(32512));
+    }
+    SOKOL_ASSERT(0 != _sapp.win32.cursors[cursor]);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_init_cursors(void) {
+    for (int i = 0; i < _SAPP_MOUSECURSOR_NUM; i++) {
+        _sapp_win32_init_cursor((sapp_mouse_cursor)i);
+    }
+}
+
+_SOKOL_PRIVATE bool _sapp_win32_cursor_in_content_area(void) {
+    POINT pos;
+    if (!GetCursorPos(&pos)) {
+        return false;
+    }
+    if (WindowFromPoint(pos) != _sapp.win32.hwnd) {
+        return false;
+    }
+    RECT area;
+    GetClientRect(_sapp.win32.hwnd, &area);
+    ClientToScreen(_sapp.win32.hwnd, (POINT*)&area.left);
+    ClientToScreen(_sapp.win32.hwnd, (POINT*)&area.right);
+    return PtInRect(&area, pos) == TRUE;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_update_cursor(sapp_mouse_cursor cursor, bool shown, bool skip_area_test) {
+    // NOTE: when called from WM_SETCURSOR, the area test would be redundant
+    if (!skip_area_test) {
+        if (!_sapp_win32_cursor_in_content_area()) {
+            return;
+        }
+    }
+    if (!shown) {
+        SetCursor(NULL);
+    }
+    else {
+        SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+        SOKOL_ASSERT(0 != _sapp.win32.cursors[cursor]);
+        SetCursor(_sapp.win32.cursors[cursor]);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_capture_mouse(uint8_t btn_mask) {
+    if (0 == _sapp.win32.mouse_capture_mask) {
+        SetCapture(_sapp.win32.hwnd);
+    }
+    _sapp.win32.mouse_capture_mask |= btn_mask;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_release_mouse(uint8_t btn_mask) {
+    if (0 != _sapp.win32.mouse_capture_mask) {
+        _sapp.win32.mouse_capture_mask &= ~btn_mask;
+        if (0 == _sapp.win32.mouse_capture_mask) {
+            ReleaseCapture();
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_lock_mouse(bool lock) {
+    if (lock == _sapp.mouse.locked) {
+        return;
+    }
+    _sapp.mouse.dx = 0.0f;
+    _sapp.mouse.dy = 0.0f;
+    _sapp.mouse.locked = lock;
+    _sapp_win32_release_mouse(0xFF);
+    if (_sapp.mouse.locked) {
+        /* store the current mouse position, so it can be restored when unlocked */
+        POINT pos;
+        BOOL res = GetCursorPos(&pos);
+        SOKOL_ASSERT(res); _SOKOL_UNUSED(res);
+        _sapp.win32.mouse_locked_x = pos.x;
+        _sapp.win32.mouse_locked_y = pos.y;
+
+        /* while the mouse is locked, make the mouse cursor invisible and
+           confine the mouse movement to a small rectangle inside our window
+           (so that we don't miss any mouse up events)
+        */
+        RECT client_rect = {
+            _sapp.win32.mouse_locked_x,
+            _sapp.win32.mouse_locked_y,
+            _sapp.win32.mouse_locked_x,
+            _sapp.win32.mouse_locked_y
+        };
+        ClipCursor(&client_rect);
+
+        /* make the mouse cursor invisible, this will stack with sapp_show_mouse() */
+        ShowCursor(FALSE);
+
+        /* enable raw input for mouse, starts sending WM_INPUT messages to WinProc (see GLFW) */
+        const RAWINPUTDEVICE rid = {
+            0x01,   // usUsagePage: HID_USAGE_PAGE_GENERIC
+            0x02,   // usUsage: HID_USAGE_GENERIC_MOUSE
+            0,      // dwFlags
+            _sapp.win32.hwnd    // hwndTarget
+        };
+        if (!RegisterRawInputDevices(&rid, 1, sizeof(rid))) {
+            _SAPP_ERROR(WIN32_REGISTER_RAW_INPUT_DEVICES_FAILED_MOUSE_LOCK);
+        }
+        /* in case the raw mouse device only supports absolute position reporting,
+           we need to skip the dx/dy compution for the first WM_INPUT event
+        */
+        _sapp.win32.raw_input_mousepos_valid = false;
+    }
+    else {
+        /* disable raw input for mouse */
+        const RAWINPUTDEVICE rid = { 0x01, 0x02, RIDEV_REMOVE, NULL };
+        if (!RegisterRawInputDevices(&rid, 1, sizeof(rid))) {
+            _SAPP_ERROR(WIN32_REGISTER_RAW_INPUT_DEVICES_FAILED_MOUSE_UNLOCK);
+        }
+
+        /* let the mouse roam freely again */
+        ClipCursor(NULL);
+        ShowCursor(TRUE);
+
+        /* restore the 'pre-locked' mouse position */
+        BOOL res = SetCursorPos(_sapp.win32.mouse_locked_x, _sapp.win32.mouse_locked_y);
+        SOKOL_ASSERT(res); _SOKOL_UNUSED(res);
+    }
+}
+
+_SOKOL_PRIVATE bool _sapp_win32_update_monitor(void) {
+    const HMONITOR cur_monitor = MonitorFromWindow(_sapp.win32.hwnd, MONITOR_DEFAULTTONULL);
+    if (cur_monitor != _sapp.win32.hmonitor) {
+        _sapp.win32.hmonitor = cur_monitor;
+        return true;
+    }
+    else {
+        return false;
+    }
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_win32_mods(void) {
+    uint32_t mods = 0;
+    if (GetKeyState(VK_SHIFT) & (1<<15)) {
+        mods |= SAPP_MODIFIER_SHIFT;
+    }
+    if (GetKeyState(VK_CONTROL) & (1<<15)) {
+        mods |= SAPP_MODIFIER_CTRL;
+    }
+    if (GetKeyState(VK_MENU) & (1<<15)) {
+        mods |= SAPP_MODIFIER_ALT;
+    }
+    if ((GetKeyState(VK_LWIN) | GetKeyState(VK_RWIN)) & (1<<15)) {
+        mods |= SAPP_MODIFIER_SUPER;
+    }
+    const bool swapped = (TRUE == GetSystemMetrics(SM_SWAPBUTTON));
+    if (GetAsyncKeyState(VK_LBUTTON)) {
+        mods |= swapped ? SAPP_MODIFIER_RMB : SAPP_MODIFIER_LMB;
+    }
+    if (GetAsyncKeyState(VK_RBUTTON)) {
+        mods |= swapped ? SAPP_MODIFIER_LMB : SAPP_MODIFIER_RMB;
+    }
+    if (GetAsyncKeyState(VK_MBUTTON)) {
+        mods |= SAPP_MODIFIER_MMB;
+    }
+    return mods;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_mouse_update(LPARAM lParam) {
+    if (!_sapp.mouse.locked) {
+        const float new_x  = (float)GET_X_LPARAM(lParam) * _sapp.win32.dpi.mouse_scale;
+        const float new_y = (float)GET_Y_LPARAM(lParam) * _sapp.win32.dpi.mouse_scale;
+        if (_sapp.mouse.pos_valid) {
+            // don't update dx/dy in the very first event
+            _sapp.mouse.dx = new_x - _sapp.mouse.x;
+            _sapp.mouse.dy = new_y - _sapp.mouse.y;
+        }
+        _sapp.mouse.x = new_x;
+        _sapp.mouse.y = new_y;
+        _sapp.mouse.pos_valid = true;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_mouse_event(sapp_event_type type, sapp_mousebutton btn) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp.event.modifiers = _sapp_win32_mods();
+        _sapp.event.mouse_button = btn;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_scroll_event(float x, float y) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_MOUSE_SCROLL);
+        _sapp.event.modifiers = _sapp_win32_mods();
+        _sapp.event.scroll_x = -x / 30.0f;
+        _sapp.event.scroll_y = y / 30.0f;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_key_event(sapp_event_type type, int vk, bool repeat) {
+    if (_sapp_events_enabled() && (vk < SAPP_MAX_KEYCODES)) {
+        _sapp_init_event(type);
+        _sapp.event.modifiers = _sapp_win32_mods();
+        _sapp.event.key_code = _sapp.keycodes[vk];
+        _sapp.event.key_repeat = repeat;
+        _sapp_call_event(&_sapp.event);
+        /* check if a CLIPBOARD_PASTED event must be sent too */
+        if (_sapp.clipboard.enabled &&
+            (type == SAPP_EVENTTYPE_KEY_DOWN) &&
+            (_sapp.event.modifiers == SAPP_MODIFIER_CTRL) &&
+            (_sapp.event.key_code == SAPP_KEYCODE_V))
+        {
+            _sapp_init_event(SAPP_EVENTTYPE_CLIPBOARD_PASTED);
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_char_event(uint32_t c, bool repeat) {
+    if (_sapp_events_enabled() && (c >= 32)) {
+        _sapp_init_event(SAPP_EVENTTYPE_CHAR);
+        _sapp.event.modifiers = _sapp_win32_mods();
+        _sapp.event.char_code = c;
+        _sapp.event.key_repeat = repeat;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_dpi_changed(HWND hWnd, LPRECT proposed_win_rect) {
+    /* called on WM_DPICHANGED, which will only be sent to the application
+        if sapp_desc.high_dpi is true and the Windows version is recent enough
+        to support DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2
+    */
+    SOKOL_ASSERT(_sapp.desc.high_dpi);
+    HINSTANCE user32 = LoadLibraryA("user32.dll");
+    if (!user32) {
+        return;
+    }
+    typedef UINT(WINAPI * GETDPIFORWINDOW_T)(HWND hwnd);
+    GETDPIFORWINDOW_T fn_getdpiforwindow = (GETDPIFORWINDOW_T)(void*)GetProcAddress(user32, "GetDpiForWindow");
+    if (fn_getdpiforwindow) {
+        UINT dpix = fn_getdpiforwindow(_sapp.win32.hwnd);
+        // NOTE: for high-dpi apps, mouse_scale remains one
+        _sapp.win32.dpi.window_scale = (float)dpix / 96.0f;
+        _sapp.win32.dpi.content_scale = _sapp.win32.dpi.window_scale;
+        _sapp.dpi_scale = _sapp.win32.dpi.window_scale;
+        SetWindowPos(hWnd, 0,
+            proposed_win_rect->left,
+            proposed_win_rect->top,
+            proposed_win_rect->right - proposed_win_rect->left,
+            proposed_win_rect->bottom - proposed_win_rect->top,
+            SWP_NOZORDER | SWP_NOACTIVATE);
+    }
+    FreeLibrary(user32);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_files_dropped(HDROP hdrop) {
+    if (!_sapp.drop.enabled) {
+        return;
+    }
+    _sapp_clear_drop_buffer();
+    bool drop_failed = false;
+    const int count = (int) DragQueryFileW(hdrop, 0xffffffff, NULL, 0);
+    _sapp.drop.num_files = (count > _sapp.drop.max_files) ? _sapp.drop.max_files : count;
+    for (UINT i = 0;  i < (UINT)_sapp.drop.num_files;  i++) {
+        const UINT num_chars = DragQueryFileW(hdrop, i, NULL, 0) + 1;
+        WCHAR* buffer = (WCHAR*) _sapp_malloc_clear(num_chars * sizeof(WCHAR));
+        DragQueryFileW(hdrop, i, buffer, num_chars);
+        if (!_sapp_win32_wide_to_utf8(buffer, _sapp_dropped_file_path_ptr((int)i), _sapp.drop.max_path_length)) {
+            _SAPP_ERROR(DROPPED_FILE_PATH_TOO_LONG);
+            drop_failed = true;
+        }
+        _sapp_free(buffer);
+    }
+    DragFinish(hdrop);
+    if (!drop_failed) {
+        if (_sapp_events_enabled()) {
+            _sapp_init_event(SAPP_EVENTTYPE_FILES_DROPPED);
+            _sapp.event.modifiers = _sapp_win32_mods();
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+    else {
+        _sapp_clear_drop_buffer();
+        _sapp.drop.num_files = 0;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_timing_measure(void) {
+    #if defined(SOKOL_D3D11)
+        // on D3D11, use the more precise DXGI timestamp
+        if (_sapp.d3d11.use_dxgi_frame_stats) {
+            DXGI_FRAME_STATISTICS dxgi_stats;
+            _sapp_clear(&dxgi_stats, sizeof(dxgi_stats));
+            HRESULT hr = _sapp_dxgi_GetFrameStatistics(_sapp.d3d11.swap_chain, &dxgi_stats);
+            if (SUCCEEDED(hr)) {
+                if (dxgi_stats.SyncRefreshCount != _sapp.d3d11.sync_refresh_count) {
+                    if ((_sapp.d3d11.sync_refresh_count + 1) != dxgi_stats.SyncRefreshCount) {
+                        _sapp_timing_discontinuity(&_sapp.timing);
+                    }
+                    _sapp.d3d11.sync_refresh_count = dxgi_stats.SyncRefreshCount;
+                    LARGE_INTEGER qpc = dxgi_stats.SyncQPCTime;
+                    const uint64_t now = (uint64_t)_sapp_int64_muldiv(qpc.QuadPart - _sapp.timing.timestamp.win.start.QuadPart, 1000000000, _sapp.timing.timestamp.win.freq.QuadPart);
+                    _sapp_timing_external(&_sapp.timing, (double)now / 1000000000.0);
+                }
+                return;
+            }
+        }
+        // fallback if swap model isn't "flip-discard" or GetFrameStatistics failed for another reason
+        _sapp_timing_measure(&_sapp.timing);
+    #endif
+    #if defined(SOKOL_GLCORE33)
+        _sapp_timing_measure(&_sapp.timing);
+    #endif
+}
+
+_SOKOL_PRIVATE LRESULT CALLBACK _sapp_win32_wndproc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
+    if (!_sapp.win32.in_create_window) {
+        switch (uMsg) {
+            case WM_CLOSE:
+                /* only give user a chance to intervene when sapp_quit() wasn't already called */
+                if (!_sapp.quit_ordered) {
+                    /* if window should be closed and event handling is enabled, give user code
+                        a change to intervene via sapp_cancel_quit()
+                    */
+                    _sapp.quit_requested = true;
+                    _sapp_win32_app_event(SAPP_EVENTTYPE_QUIT_REQUESTED);
+                    /* if user code hasn't intervened, quit the app */
+                    if (_sapp.quit_requested) {
+                        _sapp.quit_ordered = true;
+                    }
+                }
+                if (_sapp.quit_ordered) {
+                    PostQuitMessage(0);
+                }
+                return 0;
+            case WM_SYSCOMMAND:
+                switch (wParam & 0xFFF0) {
+                    case SC_SCREENSAVE:
+                    case SC_MONITORPOWER:
+                        if (_sapp.fullscreen) {
+                            /* disable screen saver and blanking in fullscreen mode */
+                            return 0;
+                        }
+                        break;
+                    case SC_KEYMENU:
+                        /* user trying to access menu via ALT */
+                        return 0;
+                }
+                break;
+            case WM_ERASEBKGND:
+                return 1;
+            case WM_SIZE:
+                {
+                    const bool iconified = wParam == SIZE_MINIMIZED;
+                    if (iconified != _sapp.win32.iconified) {
+                        _sapp.win32.iconified = iconified;
+                        if (iconified) {
+                            _sapp_win32_app_event(SAPP_EVENTTYPE_ICONIFIED);
+                        }
+                        else {
+                            _sapp_win32_app_event(SAPP_EVENTTYPE_RESTORED);
+                        }
+                    }
+                }
+                break;
+            case WM_SETFOCUS:
+                _sapp_win32_app_event(SAPP_EVENTTYPE_FOCUSED);
+                break;
+            case WM_KILLFOCUS:
+                /* if focus is lost for any reason, and we're in mouse locked mode, disable mouse lock */
+                if (_sapp.mouse.locked) {
+                    _sapp_win32_lock_mouse(false);
+                }
+                _sapp_win32_app_event(SAPP_EVENTTYPE_UNFOCUSED);
+                break;
+            case WM_SETCURSOR:
+                if (LOWORD(lParam) == HTCLIENT) {
+                    _sapp_win32_update_cursor(_sapp.mouse.current_cursor, _sapp.mouse.shown, true);
+                    return TRUE;
+                }
+                break;
+            case WM_DPICHANGED:
+            {
+                /* Update window's DPI and size if its moved to another monitor with a different DPI
+                   Only sent if DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 is used.
+                */
+                _sapp_win32_dpi_changed(hWnd, (LPRECT)lParam);
+                break;
+            }
+            case WM_LBUTTONDOWN:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_LEFT);
+                _sapp_win32_capture_mouse(1<<SAPP_MOUSEBUTTON_LEFT);
+                break;
+            case WM_RBUTTONDOWN:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_RIGHT);
+                _sapp_win32_capture_mouse(1<<SAPP_MOUSEBUTTON_RIGHT);
+                break;
+            case WM_MBUTTONDOWN:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, SAPP_MOUSEBUTTON_MIDDLE);
+                _sapp_win32_capture_mouse(1<<SAPP_MOUSEBUTTON_MIDDLE);
+                break;
+            case WM_LBUTTONUP:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_LEFT);
+                _sapp_win32_release_mouse(1<<SAPP_MOUSEBUTTON_LEFT);
+                break;
+            case WM_RBUTTONUP:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_RIGHT);
+                _sapp_win32_release_mouse(1<<SAPP_MOUSEBUTTON_RIGHT);
+                break;
+            case WM_MBUTTONUP:
+                _sapp_win32_mouse_update(lParam);
+                _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, SAPP_MOUSEBUTTON_MIDDLE);
+                _sapp_win32_release_mouse(1<<SAPP_MOUSEBUTTON_MIDDLE);
+                break;
+            case WM_MOUSEMOVE:
+                if (!_sapp.mouse.locked) {
+                    _sapp_win32_mouse_update(lParam);
+                    if (!_sapp.win32.mouse_tracked) {
+                        _sapp.win32.mouse_tracked = true;
+                        TRACKMOUSEEVENT tme;
+                        _sapp_clear(&tme, sizeof(tme));
+                        tme.cbSize = sizeof(tme);
+                        tme.dwFlags = TME_LEAVE;
+                        tme.hwndTrack = _sapp.win32.hwnd;
+                        TrackMouseEvent(&tme);
+                        _sapp.mouse.dx = 0.0f;
+                        _sapp.mouse.dy = 0.0f;
+                        _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_ENTER, SAPP_MOUSEBUTTON_INVALID);
+                    }
+                    _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID);
+                }
+                break;
+            case WM_INPUT:
+                /* raw mouse input during mouse-lock */
+                if (_sapp.mouse.locked) {
+                    HRAWINPUT ri = (HRAWINPUT) lParam;
+                    UINT size = sizeof(_sapp.win32.raw_input_data);
+                    // see: https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getrawinputdata
+                    if ((UINT)-1 == GetRawInputData(ri, RID_INPUT, &_sapp.win32.raw_input_data, &size, sizeof(RAWINPUTHEADER))) {
+                        _SAPP_ERROR(WIN32_GET_RAW_INPUT_DATA_FAILED);
+                        break;
+                    }
+                    const RAWINPUT* raw_mouse_data = (const RAWINPUT*) &_sapp.win32.raw_input_data;
+                    if (raw_mouse_data->data.mouse.usFlags & MOUSE_MOVE_ABSOLUTE) {
+                        /* mouse only reports absolute position
+                           NOTE: This code is untested and will most likely behave wrong in Remote Desktop sessions.
+                           (such remote desktop sessions are setting the MOUSE_MOVE_ABSOLUTE flag).
+                           See: https://github.com/floooh/sokol/issues/806 and
+                           https://github.com/microsoft/DirectXTK/commit/ef56b63f3739381e451f7a5a5bd2c9779d2a7555)
+                        */
+                        LONG new_x = raw_mouse_data->data.mouse.lLastX;
+                        LONG new_y = raw_mouse_data->data.mouse.lLastY;
+                        if (_sapp.win32.raw_input_mousepos_valid) {
+                            _sapp.mouse.dx = (float) (new_x - _sapp.win32.raw_input_mousepos_x);
+                            _sapp.mouse.dy = (float) (new_y - _sapp.win32.raw_input_mousepos_y);
+                        }
+                        _sapp.win32.raw_input_mousepos_x = new_x;
+                        _sapp.win32.raw_input_mousepos_y = new_y;
+                        _sapp.win32.raw_input_mousepos_valid = true;
+                    }
+                    else {
+                        /* mouse reports movement delta (this seems to be the common case) */
+                        _sapp.mouse.dx = (float) raw_mouse_data->data.mouse.lLastX;
+                        _sapp.mouse.dy = (float) raw_mouse_data->data.mouse.lLastY;
+                    }
+                    _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID);
+                }
+                break;
+
+            case WM_MOUSELEAVE:
+                if (!_sapp.mouse.locked) {
+                    _sapp.mouse.dx = 0.0f;
+                    _sapp.mouse.dy = 0.0f;
+                    _sapp.win32.mouse_tracked = false;
+                    _sapp_win32_mouse_event(SAPP_EVENTTYPE_MOUSE_LEAVE, SAPP_MOUSEBUTTON_INVALID);
+                }
+                break;
+            case WM_MOUSEWHEEL:
+                _sapp_win32_scroll_event(0.0f, (float)((SHORT)HIWORD(wParam)));
+                break;
+            case WM_MOUSEHWHEEL:
+                _sapp_win32_scroll_event((float)((SHORT)HIWORD(wParam)), 0.0f);
+                break;
+            case WM_CHAR:
+                _sapp_win32_char_event((uint32_t)wParam, !!(lParam&0x40000000));
+                break;
+            case WM_KEYDOWN:
+            case WM_SYSKEYDOWN:
+                _sapp_win32_key_event(SAPP_EVENTTYPE_KEY_DOWN, (int)(HIWORD(lParam)&0x1FF), !!(lParam&0x40000000));
+                break;
+            case WM_KEYUP:
+            case WM_SYSKEYUP:
+                _sapp_win32_key_event(SAPP_EVENTTYPE_KEY_UP, (int)(HIWORD(lParam)&0x1FF), false);
+                break;
+            case WM_ENTERSIZEMOVE:
+                SetTimer(_sapp.win32.hwnd, 1, USER_TIMER_MINIMUM, NULL);
+                break;
+            case WM_EXITSIZEMOVE:
+                KillTimer(_sapp.win32.hwnd, 1);
+                break;
+            case WM_TIMER:
+                _sapp_win32_timing_measure();
+                _sapp_frame();
+                #if defined(SOKOL_D3D11)
+                    // present with DXGI_PRESENT_DO_NOT_WAIT
+                    _sapp_d3d11_present(true);
+                #endif
+                #if defined(SOKOL_GLCORE33)
+                    _sapp_wgl_swap_buffers();
+                #endif
+                /* NOTE: resizing the swap-chain during resize leads to a substantial
+                   memory spike (hundreds of megabytes for a few seconds).
+
+                if (_sapp_win32_update_dimensions()) {
+                    #if defined(SOKOL_D3D11)
+                    _sapp_d3d11_resize_default_render_target();
+                    #endif
+                    _sapp_win32_app_event(SAPP_EVENTTYPE_RESIZED);
+                }
+                */
+                break;
+            case WM_NCLBUTTONDOWN:
+                /* workaround for half-second pause when starting to move window
+                    see: https://gamedev.net/forums/topic/672094-keeping-things-moving-during-win32-moveresize-events/5254386/
+                */
+                if (SendMessage(_sapp.win32.hwnd, WM_NCHITTEST, wParam, lParam) == HTCAPTION) {
+                    POINT point;
+                    GetCursorPos(&point);
+                    ScreenToClient(_sapp.win32.hwnd, &point);
+                    PostMessage(_sapp.win32.hwnd, WM_MOUSEMOVE, 0, ((uint32_t)point.x)|(((uint32_t)point.y) << 16));
+                }
+                break;
+            case WM_DROPFILES:
+                _sapp_win32_files_dropped((HDROP)wParam);
+                break;
+            case WM_DISPLAYCHANGE:
+                // refresh rate might have changed
+                _sapp_timing_reset(&_sapp.timing);
+                break;
+
+            default:
+                break;
+        }
+    }
+    return DefWindowProcW(hWnd, uMsg, wParam, lParam);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_create_window(void) {
+    WNDCLASSW wndclassw;
+    _sapp_clear(&wndclassw, sizeof(wndclassw));
+    wndclassw.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
+    wndclassw.lpfnWndProc = (WNDPROC) _sapp_win32_wndproc;
+    wndclassw.hInstance = GetModuleHandleW(NULL);
+    wndclassw.hCursor = LoadCursor(NULL, IDC_ARROW);
+    wndclassw.hIcon = LoadIcon(NULL, IDI_WINLOGO);
+    wndclassw.lpszClassName = L"SOKOLAPP";
+    RegisterClassW(&wndclassw);
+
+    /* NOTE: regardless whether fullscreen is requested or not, a regular
+       windowed-mode window will always be created first (however in hidden
+       mode, so that no windowed-mode window pops up before the fullscreen window)
+    */
+    const DWORD win_ex_style = WS_EX_APPWINDOW | WS_EX_WINDOWEDGE;
+    RECT rect = { 0, 0, 0, 0 };
+    DWORD win_style = WS_CLIPSIBLINGS | WS_CLIPCHILDREN | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_SIZEBOX;
+    rect.right = (int) ((float)_sapp.window_width * _sapp.win32.dpi.window_scale);
+    rect.bottom = (int) ((float)_sapp.window_height * _sapp.win32.dpi.window_scale);
+    const bool use_default_width = 0 == _sapp.window_width;
+    const bool use_default_height = 0 == _sapp.window_height;
+    AdjustWindowRectEx(&rect, win_style, FALSE, win_ex_style);
+    const int win_width = rect.right - rect.left;
+    const int win_height = rect.bottom - rect.top;
+    _sapp.win32.in_create_window = true;
+    _sapp.win32.hwnd = CreateWindowExW(
+        win_ex_style,               // dwExStyle
+        L"SOKOLAPP",                // lpClassName
+        _sapp.window_title_wide,    // lpWindowName
+        win_style,                  // dwStyle
+        CW_USEDEFAULT,              // X
+        SW_HIDE,                    // Y (NOTE: CW_USEDEFAULT is not used for position here, but internally calls ShowWindow!
+        use_default_width ? CW_USEDEFAULT : win_width, // nWidth
+        use_default_height ? CW_USEDEFAULT : win_height, // nHeight (NOTE: if width is CW_USEDEFAULT, height is actually ignored)
+        NULL,                       // hWndParent
+        NULL,                       // hMenu
+        GetModuleHandle(NULL),      // hInstance
+        NULL);                      // lParam
+    _sapp.win32.in_create_window = false;
+    _sapp.win32.dc = GetDC(_sapp.win32.hwnd);
+    _sapp.win32.hmonitor = MonitorFromWindow(_sapp.win32.hwnd, MONITOR_DEFAULTTONULL);
+    SOKOL_ASSERT(_sapp.win32.dc);
+
+    /* this will get the actual windowed-mode window size, if fullscreen
+       is requested, the set_fullscreen function will then capture the
+       current window rectangle, which then might be used later to
+       restore the window position when switching back to windowed
+    */
+    _sapp_win32_update_dimensions();
+    if (_sapp.fullscreen) {
+        _sapp_win32_set_fullscreen(_sapp.fullscreen, SWP_HIDEWINDOW);
+        _sapp_win32_update_dimensions();
+    }
+    ShowWindow(_sapp.win32.hwnd, SW_SHOW);
+    DragAcceptFiles(_sapp.win32.hwnd, 1);
+}
+
+_SOKOL_PRIVATE void _sapp_win32_destroy_window(void) {
+    DestroyWindow(_sapp.win32.hwnd); _sapp.win32.hwnd = 0;
+    UnregisterClassW(L"SOKOLAPP", GetModuleHandleW(NULL));
+}
+
+_SOKOL_PRIVATE void _sapp_win32_destroy_icons(void) {
+    if (_sapp.win32.big_icon) {
+        DestroyIcon(_sapp.win32.big_icon);
+        _sapp.win32.big_icon = 0;
+    }
+    if (_sapp.win32.small_icon) {
+        DestroyIcon(_sapp.win32.small_icon);
+        _sapp.win32.small_icon = 0;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_init_console(void) {
+    if (_sapp.desc.win32_console_create || _sapp.desc.win32_console_attach) {
+        BOOL con_valid = FALSE;
+        if (_sapp.desc.win32_console_create) {
+            con_valid = AllocConsole();
+        }
+        else if (_sapp.desc.win32_console_attach) {
+            con_valid = AttachConsole(ATTACH_PARENT_PROCESS);
+        }
+        if (con_valid) {
+            FILE* res_fp = 0;
+            errno_t err;
+            err = freopen_s(&res_fp, "CON", "w", stdout);
+            (void)err;
+            err = freopen_s(&res_fp, "CON", "w", stderr);
+            (void)err;
+        }
+    }
+    if (_sapp.desc.win32_console_utf8) {
+        _sapp.win32.orig_codepage = GetConsoleOutputCP();
+        SetConsoleOutputCP(CP_UTF8);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_restore_console(void) {
+    if (_sapp.desc.win32_console_utf8) {
+        SetConsoleOutputCP(_sapp.win32.orig_codepage);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_init_dpi(void) {
+
+    DECLARE_HANDLE(DPI_AWARENESS_CONTEXT_T);
+    typedef BOOL(WINAPI * SETPROCESSDPIAWARE_T)(void);
+    typedef bool (WINAPI * SETPROCESSDPIAWARENESSCONTEXT_T)(DPI_AWARENESS_CONTEXT_T); // since Windows 10, version 1703
+    typedef HRESULT(WINAPI * SETPROCESSDPIAWARENESS_T)(PROCESS_DPI_AWARENESS);
+    typedef HRESULT(WINAPI * GETDPIFORMONITOR_T)(HMONITOR, MONITOR_DPI_TYPE, UINT*, UINT*);
+
+    SETPROCESSDPIAWARE_T fn_setprocessdpiaware = 0;
+    SETPROCESSDPIAWARENESS_T fn_setprocessdpiawareness = 0;
+    GETDPIFORMONITOR_T fn_getdpiformonitor = 0;
+    SETPROCESSDPIAWARENESSCONTEXT_T fn_setprocessdpiawarenesscontext =0;
+
+    HINSTANCE user32 = LoadLibraryA("user32.dll");
+    if (user32) {
+        fn_setprocessdpiaware = (SETPROCESSDPIAWARE_T)(void*) GetProcAddress(user32, "SetProcessDPIAware");
+        fn_setprocessdpiawarenesscontext = (SETPROCESSDPIAWARENESSCONTEXT_T)(void*) GetProcAddress(user32, "SetProcessDpiAwarenessContext");
+    }
+    HINSTANCE shcore = LoadLibraryA("shcore.dll");
+    if (shcore) {
+        fn_setprocessdpiawareness = (SETPROCESSDPIAWARENESS_T)(void*) GetProcAddress(shcore, "SetProcessDpiAwareness");
+        fn_getdpiformonitor = (GETDPIFORMONITOR_T)(void*) GetProcAddress(shcore, "GetDpiForMonitor");
+    }
+    /*
+        NOTE on SetProcessDpiAware() vs SetProcessDpiAwareness() vs SetProcessDpiAwarenessContext():
+
+        These are different attempts to get DPI handling on Windows right, from oldest
+        to newest. SetProcessDpiAwarenessContext() is required for the new
+        DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2 method.
+    */
+    if (fn_setprocessdpiawareness) {
+        if (_sapp.desc.high_dpi) {
+            /* app requests HighDPI rendering, first try the Win10 Creator Update per-monitor-dpi awareness,
+               if that fails, fall back to system-dpi-awareness
+            */
+            _sapp.win32.dpi.aware = true;
+            DPI_AWARENESS_CONTEXT_T per_monitor_aware_v2 = (DPI_AWARENESS_CONTEXT_T)-4;
+            if (!(fn_setprocessdpiawarenesscontext && fn_setprocessdpiawarenesscontext(per_monitor_aware_v2))) {
+                // fallback to system-dpi-aware
+                fn_setprocessdpiawareness(PROCESS_SYSTEM_DPI_AWARE);
+            }
+        }
+        else {
+            /* if the app didn't request HighDPI rendering, let Windows do the upscaling */
+            _sapp.win32.dpi.aware = false;
+            fn_setprocessdpiawareness(PROCESS_DPI_UNAWARE);
+        }
+    }
+    else if (fn_setprocessdpiaware) {
+        // fallback for Windows 7
+        _sapp.win32.dpi.aware = true;
+        fn_setprocessdpiaware();
+    }
+    /* get dpi scale factor for main monitor */
+    if (fn_getdpiformonitor && _sapp.win32.dpi.aware) {
+        POINT pt = { 1, 1 };
+        HMONITOR hm = MonitorFromPoint(pt, MONITOR_DEFAULTTONEAREST);
+        UINT dpix, dpiy;
+        HRESULT hr = fn_getdpiformonitor(hm, MDT_EFFECTIVE_DPI, &dpix, &dpiy);
+        _SOKOL_UNUSED(hr);
+        SOKOL_ASSERT(SUCCEEDED(hr));
+        /* clamp window scale to an integer factor */
+        _sapp.win32.dpi.window_scale = (float)dpix / 96.0f;
+    }
+    else {
+        _sapp.win32.dpi.window_scale = 1.0f;
+    }
+    if (_sapp.desc.high_dpi) {
+        _sapp.win32.dpi.content_scale = _sapp.win32.dpi.window_scale;
+        _sapp.win32.dpi.mouse_scale = 1.0f;
+    }
+    else {
+        _sapp.win32.dpi.content_scale = 1.0f;
+        _sapp.win32.dpi.mouse_scale = 1.0f / _sapp.win32.dpi.window_scale;
+    }
+    _sapp.dpi_scale = _sapp.win32.dpi.content_scale;
+    if (user32) {
+        FreeLibrary(user32);
+    }
+    if (shcore) {
+        FreeLibrary(shcore);
+    }
+}
+
+_SOKOL_PRIVATE bool _sapp_win32_set_clipboard_string(const char* str) {
+    SOKOL_ASSERT(str);
+    SOKOL_ASSERT(_sapp.win32.hwnd);
+    SOKOL_ASSERT(_sapp.clipboard.enabled && (_sapp.clipboard.buf_size > 0));
+
+    if (!OpenClipboard(_sapp.win32.hwnd)) {
+        return false;
+    }
+
+    HANDLE object = 0;
+    wchar_t* wchar_buf = 0;
+
+    const SIZE_T wchar_buf_size = (SIZE_T)_sapp.clipboard.buf_size * sizeof(wchar_t);
+    object = GlobalAlloc(GMEM_MOVEABLE, wchar_buf_size);
+    if (NULL == object) {
+        goto error;
+    }
+    wchar_buf = (wchar_t*) GlobalLock(object);
+    if (NULL == wchar_buf) {
+        goto error;
+    }
+    if (!_sapp_win32_utf8_to_wide(str, wchar_buf, (int)wchar_buf_size)) {
+        goto error;
+    }
+    GlobalUnlock(object);
+    wchar_buf = 0;
+    EmptyClipboard();
+    // NOTE: when successful, SetClipboardData() takes ownership of memory object!
+    if (NULL == SetClipboardData(CF_UNICODETEXT, object)) {
+        goto error;
+    }
+    CloseClipboard();
+    return true;
+
+error:
+    if (wchar_buf) {
+        GlobalUnlock(object);
+    }
+    if (object) {
+        GlobalFree(object);
+    }
+    CloseClipboard();
+    return false;
+}
+
+_SOKOL_PRIVATE const char* _sapp_win32_get_clipboard_string(void) {
+    SOKOL_ASSERT(_sapp.clipboard.enabled && _sapp.clipboard.buffer);
+    SOKOL_ASSERT(_sapp.win32.hwnd);
+    if (!OpenClipboard(_sapp.win32.hwnd)) {
+        /* silently ignore any errors and just return the current
+           content of the local clipboard buffer
+        */
+        return _sapp.clipboard.buffer;
+    }
+    HANDLE object = GetClipboardData(CF_UNICODETEXT);
+    if (!object) {
+        CloseClipboard();
+        return _sapp.clipboard.buffer;
+    }
+    const wchar_t* wchar_buf = (const wchar_t*) GlobalLock(object);
+    if (!wchar_buf) {
+        CloseClipboard();
+        return _sapp.clipboard.buffer;
+    }
+    if (!_sapp_win32_wide_to_utf8(wchar_buf, _sapp.clipboard.buffer, _sapp.clipboard.buf_size)) {
+        _SAPP_ERROR(CLIPBOARD_STRING_TOO_BIG);
+    }
+    GlobalUnlock(object);
+    CloseClipboard();
+    return _sapp.clipboard.buffer;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_update_window_title(void) {
+    _sapp_win32_utf8_to_wide(_sapp.window_title, _sapp.window_title_wide, sizeof(_sapp.window_title_wide));
+    SetWindowTextW(_sapp.win32.hwnd, _sapp.window_title_wide);
+}
+
+_SOKOL_PRIVATE HICON _sapp_win32_create_icon_from_image(const sapp_image_desc* desc) {
+    BITMAPV5HEADER bi;
+    _sapp_clear(&bi, sizeof(bi));
+    bi.bV5Size = sizeof(bi);
+    bi.bV5Width = desc->width;
+    bi.bV5Height = -desc->height;   // NOTE the '-' here to indicate that origin is top-left
+    bi.bV5Planes = 1;
+    bi.bV5BitCount = 32;
+    bi.bV5Compression = BI_BITFIELDS;
+    bi.bV5RedMask = 0x00FF0000;
+    bi.bV5GreenMask = 0x0000FF00;
+    bi.bV5BlueMask = 0x000000FF;
+    bi.bV5AlphaMask = 0xFF000000;
+
+    uint8_t* target = 0;
+    const uint8_t* source = (const uint8_t*)desc->pixels.ptr;
+
+    HDC dc = GetDC(NULL);
+    HBITMAP color = CreateDIBSection(dc, (BITMAPINFO*)&bi, DIB_RGB_COLORS, (void**)&target, NULL, (DWORD)0);
+    ReleaseDC(NULL, dc);
+    if (0 == color) {
+        return NULL;
+    }
+    SOKOL_ASSERT(target);
+
+    HBITMAP mask = CreateBitmap(desc->width, desc->height, 1, 1, NULL);
+    if (0 == mask) {
+        DeleteObject(color);
+        return NULL;
+    }
+
+    for (int i = 0; i < (desc->width*desc->height); i++) {
+        target[0] = source[2];
+        target[1] = source[1];
+        target[2] = source[0];
+        target[3] = source[3];
+        target += 4;
+        source += 4;
+    }
+
+    ICONINFO icon_info;
+    _sapp_clear(&icon_info, sizeof(icon_info));
+    icon_info.fIcon = true;
+    icon_info.xHotspot = 0;
+    icon_info.yHotspot = 0;
+    icon_info.hbmMask = mask;
+    icon_info.hbmColor = color;
+    HICON icon_handle = CreateIconIndirect(&icon_info);
+    DeleteObject(color);
+    DeleteObject(mask);
+
+    return icon_handle;
+}
+
+_SOKOL_PRIVATE void _sapp_win32_set_icon(const sapp_icon_desc* icon_desc, int num_images) {
+    SOKOL_ASSERT((num_images > 0) && (num_images <= SAPP_MAX_ICONIMAGES));
+
+    int big_img_index = _sapp_image_bestmatch(icon_desc->images, num_images, GetSystemMetrics(SM_CXICON), GetSystemMetrics(SM_CYICON));
+    int sml_img_index = _sapp_image_bestmatch(icon_desc->images, num_images, GetSystemMetrics(SM_CXSMICON), GetSystemMetrics(SM_CYSMICON));
+    HICON big_icon = _sapp_win32_create_icon_from_image(&icon_desc->images[big_img_index]);
+    HICON sml_icon = _sapp_win32_create_icon_from_image(&icon_desc->images[sml_img_index]);
+
+    // if icon creation or lookup has failed for some reason, leave the currently set icon untouched
+    if (0 != big_icon) {
+        SendMessage(_sapp.win32.hwnd, WM_SETICON, ICON_BIG, (LPARAM) big_icon);
+        if (0 != _sapp.win32.big_icon) {
+            DestroyIcon(_sapp.win32.big_icon);
+        }
+        _sapp.win32.big_icon = big_icon;
+    }
+    if (0 != sml_icon) {
+        SendMessage(_sapp.win32.hwnd, WM_SETICON, ICON_SMALL, (LPARAM) sml_icon);
+        if (0 != _sapp.win32.small_icon) {
+            DestroyIcon(_sapp.win32.small_icon);
+        }
+        _sapp.win32.small_icon = sml_icon;
+    }
+}
+
+/* don't laugh, but this seems to be the easiest and most robust
+   way to check if we're running on Win10
+
+   From: https://github.com/videolan/vlc/blob/232fb13b0d6110c4d1b683cde24cf9a7f2c5c2ea/modules/video_output/win32/d3d11_swapchain.c#L263
+*/
+_SOKOL_PRIVATE bool _sapp_win32_is_win10_or_greater(void) {
+    HMODULE h = GetModuleHandleW(L"kernel32.dll");
+    if (NULL != h) {
+        return (NULL != GetProcAddress(h, "GetSystemCpuSetInformation"));
+    }
+    else {
+        return false;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_win32_run(const sapp_desc* desc) {
+    _sapp_init_state(desc);
+    _sapp_win32_init_console();
+    _sapp.win32.is_win10_or_greater = _sapp_win32_is_win10_or_greater();
+    _sapp_win32_init_keytable();
+    _sapp_win32_utf8_to_wide(_sapp.window_title, _sapp.window_title_wide, sizeof(_sapp.window_title_wide));
+    _sapp_win32_init_dpi();
+    _sapp_win32_init_cursors();
+    _sapp_win32_create_window();
+    sapp_set_icon(&desc->icon);
+    #if defined(SOKOL_D3D11)
+        _sapp_d3d11_create_device_and_swapchain();
+        _sapp_d3d11_create_default_render_target();
+    #endif
+    #if defined(SOKOL_GLCORE33)
+        _sapp_wgl_init();
+        _sapp_wgl_load_extensions();
+        _sapp_wgl_create_context();
+    #endif
+    _sapp.valid = true;
+
+    bool done = false;
+    while (!(done || _sapp.quit_ordered)) {
+        _sapp_win32_timing_measure();
+        MSG msg;
+        while (PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
+            if (WM_QUIT == msg.message) {
+                done = true;
+                continue;
+            }
+            else {
+                TranslateMessage(&msg);
+                DispatchMessageW(&msg);
+            }
+        }
+        _sapp_frame();
+        #if defined(SOKOL_D3D11)
+            _sapp_d3d11_present(false);
+            if (IsIconic(_sapp.win32.hwnd)) {
+                Sleep((DWORD)(16 * _sapp.swap_interval));
+            }
+        #endif
+        #if defined(SOKOL_GLCORE33)
+            _sapp_wgl_swap_buffers();
+        #endif
+        /* check for window resized, this cannot happen in WM_SIZE as it explodes memory usage */
+        if (_sapp_win32_update_dimensions()) {
+            #if defined(SOKOL_D3D11)
+            _sapp_d3d11_resize_default_render_target();
+            #endif
+            _sapp_win32_app_event(SAPP_EVENTTYPE_RESIZED);
+        }
+        /* check if the window monitor has changed, need to reset timing because
+           the new monitor might have a different refresh rate
+        */
+        if (_sapp_win32_update_monitor()) {
+            _sapp_timing_reset(&_sapp.timing);
+        }
+        if (_sapp.quit_requested) {
+            PostMessage(_sapp.win32.hwnd, WM_CLOSE, 0, 0);
+        }
+    }
+    _sapp_call_cleanup();
+
+    #if defined(SOKOL_D3D11)
+        _sapp_d3d11_destroy_default_render_target();
+        _sapp_d3d11_destroy_device_and_swapchain();
+    #else
+        _sapp_wgl_destroy_context();
+        _sapp_wgl_shutdown();
+    #endif
+    _sapp_win32_destroy_window();
+    _sapp_win32_destroy_icons();
+    _sapp_win32_restore_console();
+    _sapp_discard_state();
+}
+
+_SOKOL_PRIVATE char** _sapp_win32_command_line_to_utf8_argv(LPWSTR w_command_line, int* o_argc) {
+    int argc = 0;
+    char** argv = 0;
+    char* args;
+
+    LPWSTR* w_argv = CommandLineToArgvW(w_command_line, &argc);
+    if (w_argv == NULL) {
+        // FIXME: chicken egg problem, can't report errors before sokol_main() is called!
+    } else {
+        size_t size = wcslen(w_command_line) * 4;
+        argv = (char**) _sapp_malloc_clear(((size_t)argc + 1) * sizeof(char*) + size);
+        SOKOL_ASSERT(argv);
+        args = (char*) &argv[argc + 1];
+        int n;
+        for (int i = 0; i < argc; ++i) {
+            n = WideCharToMultiByte(CP_UTF8, 0, w_argv[i], -1, args, (int)size, NULL, NULL);
+            if (n == 0) {
+                // FIXME: chicken egg problem, can't report errors before sokol_main() is called!
+                break;
+            }
+            argv[i] = args;
+            size -= (size_t)n;
+            args += n;
+        }
+        LocalFree(w_argv);
+    }
+    *o_argc = argc;
+    return argv;
+}
+
+#if !defined(SOKOL_NO_ENTRY)
+#if defined(SOKOL_WIN32_FORCE_MAIN)
+int main(int argc, char* argv[]) {
+    sapp_desc desc = sokol_main(argc, argv);
+    _sapp_win32_run(&desc);
+    return 0;
+}
+#else
+int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nCmdShow) {
+    _SOKOL_UNUSED(hInstance);
+    _SOKOL_UNUSED(hPrevInstance);
+    _SOKOL_UNUSED(lpCmdLine);
+    _SOKOL_UNUSED(nCmdShow);
+    int argc_utf8 = 0;
+    char** argv_utf8 = _sapp_win32_command_line_to_utf8_argv(GetCommandLineW(), &argc_utf8);
+    sapp_desc desc = sokol_main(argc_utf8, argv_utf8);
+    _sapp_win32_run(&desc);
+    _sapp_free(argv_utf8);
+    return 0;
+}
+#endif /* SOKOL_WIN32_FORCE_MAIN */
+#endif /* SOKOL_NO_ENTRY */
+
+#ifdef _MSC_VER
+    #pragma warning(pop)
+#endif
+
+#endif /* _SAPP_WIN32 */
+
+//  █████  ███    ██ ██████  ██████   ██████  ██ ██████
+// ██   ██ ████   ██ ██   ██ ██   ██ ██    ██ ██ ██   ██
+// ███████ ██ ██  ██ ██   ██ ██████  ██    ██ ██ ██   ██
+// ██   ██ ██  ██ ██ ██   ██ ██   ██ ██    ██ ██ ██   ██
+// ██   ██ ██   ████ ██████  ██   ██  ██████  ██ ██████
+//
+// >>android
+#if defined(_SAPP_ANDROID)
+
+/* android loop thread */
+_SOKOL_PRIVATE bool _sapp_android_init_egl(void) {
+    SOKOL_ASSERT(_sapp.android.display == EGL_NO_DISPLAY);
+    SOKOL_ASSERT(_sapp.android.context == EGL_NO_CONTEXT);
+
+    EGLDisplay display = eglGetDisplay(EGL_DEFAULT_DISPLAY);
+    if (display == EGL_NO_DISPLAY) {
+        return false;
+    }
+    if (eglInitialize(display, NULL, NULL) == EGL_FALSE) {
+        return false;
+    }
+    EGLint alpha_size = _sapp.desc.alpha ? 8 : 0;
+    const EGLint cfg_attributes[] = {
+        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+        EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_ALPHA_SIZE, alpha_size,
+        EGL_DEPTH_SIZE, 16,
+        EGL_STENCIL_SIZE, 0,
+        EGL_NONE,
+    };
+    EGLConfig available_cfgs[32];
+    EGLint cfg_count;
+    eglChooseConfig(display, cfg_attributes, available_cfgs, 32, &cfg_count);
+    SOKOL_ASSERT(cfg_count > 0);
+    SOKOL_ASSERT(cfg_count <= 32);
+
+    /* find config with 8-bit rgb buffer if available, ndk sample does not trust egl spec */
+    EGLConfig config;
+    bool exact_cfg_found = false;
+    for (int i = 0; i < cfg_count; ++i) {
+        EGLConfig c = available_cfgs[i];
+        EGLint r, g, b, a, d;
+        if (eglGetConfigAttrib(display, c, EGL_RED_SIZE, &r) == EGL_TRUE &&
+            eglGetConfigAttrib(display, c, EGL_GREEN_SIZE, &g) == EGL_TRUE &&
+            eglGetConfigAttrib(display, c, EGL_BLUE_SIZE, &b) == EGL_TRUE &&
+            eglGetConfigAttrib(display, c, EGL_ALPHA_SIZE, &a) == EGL_TRUE &&
+            eglGetConfigAttrib(display, c, EGL_DEPTH_SIZE, &d) == EGL_TRUE &&
+            r == 8 && g == 8 && b == 8 && (alpha_size == 0 || a == alpha_size) && d == 16) {
+            exact_cfg_found = true;
+            config = c;
+            break;
+        }
+    }
+    if (!exact_cfg_found) {
+        config = available_cfgs[0];
+    }
+
+    EGLint ctx_attributes[] = {
+        EGL_CONTEXT_CLIENT_VERSION, 3,
+        EGL_NONE,
+    };
+    EGLContext context = eglCreateContext(display, config, EGL_NO_CONTEXT, ctx_attributes);
+    if (context == EGL_NO_CONTEXT) {
+        return false;
+    }
+
+    _sapp.android.config = config;
+    _sapp.android.display = display;
+    _sapp.android.context = context;
+    return true;
+}
+
+_SOKOL_PRIVATE void _sapp_android_cleanup_egl(void) {
+    if (_sapp.android.display != EGL_NO_DISPLAY) {
+        eglMakeCurrent(_sapp.android.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+        if (_sapp.android.surface != EGL_NO_SURFACE) {
+            eglDestroySurface(_sapp.android.display, _sapp.android.surface);
+            _sapp.android.surface = EGL_NO_SURFACE;
+        }
+        if (_sapp.android.context != EGL_NO_CONTEXT) {
+            eglDestroyContext(_sapp.android.display, _sapp.android.context);
+            _sapp.android.context = EGL_NO_CONTEXT;
+        }
+        eglTerminate(_sapp.android.display);
+        _sapp.android.display = EGL_NO_DISPLAY;
+    }
+}
+
+_SOKOL_PRIVATE bool _sapp_android_init_egl_surface(ANativeWindow* window) {
+    SOKOL_ASSERT(_sapp.android.display != EGL_NO_DISPLAY);
+    SOKOL_ASSERT(_sapp.android.context != EGL_NO_CONTEXT);
+    SOKOL_ASSERT(_sapp.android.surface == EGL_NO_SURFACE);
+    SOKOL_ASSERT(window);
+
+    /* TODO: set window flags */
+    /* ANativeActivity_setWindowFlags(activity, AWINDOW_FLAG_KEEP_SCREEN_ON, 0); */
+
+    /* create egl surface and make it current */
+    EGLSurface surface = eglCreateWindowSurface(_sapp.android.display, _sapp.android.config, window, NULL);
+    if (surface == EGL_NO_SURFACE) {
+        return false;
+    }
+    if (eglMakeCurrent(_sapp.android.display, surface, surface, _sapp.android.context) == EGL_FALSE) {
+        return false;
+    }
+    _sapp.android.surface = surface;
+    return true;
+}
+
+_SOKOL_PRIVATE void _sapp_android_cleanup_egl_surface(void) {
+    if (_sapp.android.display == EGL_NO_DISPLAY) {
+        return;
+    }
+    eglMakeCurrent(_sapp.android.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+    if (_sapp.android.surface != EGL_NO_SURFACE) {
+        eglDestroySurface(_sapp.android.display, _sapp.android.surface);
+        _sapp.android.surface = EGL_NO_SURFACE;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_android_app_event(sapp_event_type type) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_android_update_dimensions(ANativeWindow* window, bool force_update) {
+    SOKOL_ASSERT(_sapp.android.display != EGL_NO_DISPLAY);
+    SOKOL_ASSERT(_sapp.android.context != EGL_NO_CONTEXT);
+    SOKOL_ASSERT(_sapp.android.surface != EGL_NO_SURFACE);
+    SOKOL_ASSERT(window);
+
+    const int32_t win_w = ANativeWindow_getWidth(window);
+    const int32_t win_h = ANativeWindow_getHeight(window);
+    SOKOL_ASSERT(win_w >= 0 && win_h >= 0);
+    const bool win_changed = (win_w != _sapp.window_width) || (win_h != _sapp.window_height);
+    _sapp.window_width = win_w;
+    _sapp.window_height = win_h;
+    if (win_changed || force_update) {
+        if (!_sapp.desc.high_dpi) {
+            const int32_t buf_w = win_w / 2;
+            const int32_t buf_h = win_h / 2;
+            EGLint format;
+            EGLBoolean egl_result = eglGetConfigAttrib(_sapp.android.display, _sapp.android.config, EGL_NATIVE_VISUAL_ID, &format);
+            SOKOL_ASSERT(egl_result == EGL_TRUE); _SOKOL_UNUSED(egl_result);
+            /* NOTE: calling ANativeWindow_setBuffersGeometry() with the same dimensions
+                as the ANativeWindow size results in weird display artefacts, that's
+                why it's only called when the buffer geometry is different from
+                the window size
+            */
+            int32_t result = ANativeWindow_setBuffersGeometry(window, buf_w, buf_h, format);
+            SOKOL_ASSERT(result == 0); _SOKOL_UNUSED(result);
+        }
+    }
+
+    /* query surface size */
+    EGLint fb_w, fb_h;
+    EGLBoolean egl_result_w = eglQuerySurface(_sapp.android.display, _sapp.android.surface, EGL_WIDTH, &fb_w);
+    EGLBoolean egl_result_h = eglQuerySurface(_sapp.android.display, _sapp.android.surface, EGL_HEIGHT, &fb_h);
+    SOKOL_ASSERT(egl_result_w == EGL_TRUE); _SOKOL_UNUSED(egl_result_w);
+    SOKOL_ASSERT(egl_result_h == EGL_TRUE); _SOKOL_UNUSED(egl_result_h);
+    const bool fb_changed = (fb_w != _sapp.framebuffer_width) || (fb_h != _sapp.framebuffer_height);
+    _sapp.framebuffer_width = fb_w;
+    _sapp.framebuffer_height = fb_h;
+    _sapp.dpi_scale = (float)_sapp.framebuffer_width / (float)_sapp.window_width;
+    if (win_changed || fb_changed || force_update) {
+        if (!_sapp.first_frame) {
+            _sapp_android_app_event(SAPP_EVENTTYPE_RESIZED);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_android_cleanup(void) {
+    if (_sapp.android.surface != EGL_NO_SURFACE) {
+        /* egl context is bound, cleanup gracefully */
+        if (_sapp.init_called && !_sapp.cleanup_called) {
+            _sapp_call_cleanup();
+        }
+    }
+    /* always try to cleanup by destroying egl context */
+    _sapp_android_cleanup_egl();
+}
+
+_SOKOL_PRIVATE void _sapp_android_shutdown(void) {
+    /* try to cleanup while we still have a surface and can call cleanup_cb() */
+    _sapp_android_cleanup();
+    /* request exit */
+    ANativeActivity_finish(_sapp.android.activity);
+}
+
+_SOKOL_PRIVATE void _sapp_android_frame(void) {
+    SOKOL_ASSERT(_sapp.android.display != EGL_NO_DISPLAY);
+    SOKOL_ASSERT(_sapp.android.context != EGL_NO_CONTEXT);
+    SOKOL_ASSERT(_sapp.android.surface != EGL_NO_SURFACE);
+    _sapp_timing_measure(&_sapp.timing);
+    _sapp_android_update_dimensions(_sapp.android.current.window, false);
+    _sapp_frame();
+    eglSwapBuffers(_sapp.android.display, _sapp.android.surface);
+}
+
+_SOKOL_PRIVATE bool _sapp_android_touch_event(const AInputEvent* e) {
+    if (AInputEvent_getType(e) != AINPUT_EVENT_TYPE_MOTION) {
+        return false;
+    }
+    if (!_sapp_events_enabled()) {
+        return false;
+    }
+    int32_t action_idx = AMotionEvent_getAction(e);
+    int32_t action = action_idx & AMOTION_EVENT_ACTION_MASK;
+    sapp_event_type type = SAPP_EVENTTYPE_INVALID;
+    switch (action) {
+        case AMOTION_EVENT_ACTION_DOWN:
+        case AMOTION_EVENT_ACTION_POINTER_DOWN:
+            type = SAPP_EVENTTYPE_TOUCHES_BEGAN;
+            break;
+        case AMOTION_EVENT_ACTION_MOVE:
+            type = SAPP_EVENTTYPE_TOUCHES_MOVED;
+            break;
+        case AMOTION_EVENT_ACTION_UP:
+        case AMOTION_EVENT_ACTION_POINTER_UP:
+            type = SAPP_EVENTTYPE_TOUCHES_ENDED;
+            break;
+        case AMOTION_EVENT_ACTION_CANCEL:
+            type = SAPP_EVENTTYPE_TOUCHES_CANCELLED;
+            break;
+        default:
+            break;
+    }
+    if (type == SAPP_EVENTTYPE_INVALID) {
+        return false;
+    }
+    int32_t idx = action_idx >> AMOTION_EVENT_ACTION_POINTER_INDEX_SHIFT;
+    _sapp_init_event(type);
+    _sapp.event.num_touches = (int)AMotionEvent_getPointerCount(e);
+    if (_sapp.event.num_touches > SAPP_MAX_TOUCHPOINTS) {
+        _sapp.event.num_touches = SAPP_MAX_TOUCHPOINTS;
+    }
+    for (int32_t i = 0; i < _sapp.event.num_touches; i++) {
+        sapp_touchpoint* dst = &_sapp.event.touches[i];
+        dst->identifier = (uintptr_t)AMotionEvent_getPointerId(e, (size_t)i);
+        dst->pos_x = (AMotionEvent_getRawX(e, (size_t)i) / _sapp.window_width) * _sapp.framebuffer_width;
+        dst->pos_y = (AMotionEvent_getRawY(e, (size_t)i) / _sapp.window_height) * _sapp.framebuffer_height;
+        dst->android_tooltype = (sapp_android_tooltype) AMotionEvent_getToolType(e, (size_t)i);
+        if (action == AMOTION_EVENT_ACTION_POINTER_DOWN ||
+            action == AMOTION_EVENT_ACTION_POINTER_UP) {
+            dst->changed = (i == idx);
+        } else {
+            dst->changed = true;
+        }
+    }
+    _sapp_call_event(&_sapp.event);
+    return true;
+}
+
+_SOKOL_PRIVATE bool _sapp_android_key_event(const AInputEvent* e) {
+    if (AInputEvent_getType(e) != AINPUT_EVENT_TYPE_KEY) {
+        return false;
+    }
+    if (AKeyEvent_getKeyCode(e) == AKEYCODE_BACK) {
+        /* FIXME: this should be hooked into a "really quit?" mechanism
+           so the app can ask the user for confirmation, this is currently
+           generally missing in sokol_app.h
+        */
+        _sapp_android_shutdown();
+        return true;
+    }
+    return false;
+}
+
+_SOKOL_PRIVATE int _sapp_android_input_cb(int fd, int events, void* data) {
+    _SOKOL_UNUSED(fd);
+    _SOKOL_UNUSED(data);
+    if ((events & ALOOPER_EVENT_INPUT) == 0) {
+        _SAPP_ERROR(ANDROID_UNSUPPORTED_INPUT_EVENT_INPUT_CB);
+        return 1;
+    }
+    SOKOL_ASSERT(_sapp.android.current.input);
+    AInputEvent* event = NULL;
+    while (AInputQueue_getEvent(_sapp.android.current.input, &event) >= 0) {
+        if (AInputQueue_preDispatchEvent(_sapp.android.current.input, event) != 0) {
+            continue;
+        }
+        int32_t handled = 0;
+        if (_sapp_android_touch_event(event) || _sapp_android_key_event(event)) {
+            handled = 1;
+        }
+        AInputQueue_finishEvent(_sapp.android.current.input, event, handled);
+    }
+    return 1;
+}
+
+_SOKOL_PRIVATE int _sapp_android_main_cb(int fd, int events, void* data) {
+    _SOKOL_UNUSED(data);
+    if ((events & ALOOPER_EVENT_INPUT) == 0) {
+        _SAPP_ERROR(ANDROID_UNSUPPORTED_INPUT_EVENT_MAIN_CB);
+        return 1;
+    }
+
+    _sapp_android_msg_t msg;
+    if (read(fd, &msg, sizeof(msg)) != sizeof(msg)) {
+        _SAPP_ERROR(ANDROID_READ_MSG_FAILED);
+        return 1;
+    }
+
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    switch (msg) {
+        case _SOKOL_ANDROID_MSG_CREATE:
+            {
+                _SAPP_INFO(ANDROID_MSG_CREATE);
+                SOKOL_ASSERT(!_sapp.valid);
+                bool result = _sapp_android_init_egl();
+                SOKOL_ASSERT(result); _SOKOL_UNUSED(result);
+                _sapp.valid = true;
+                _sapp.android.has_created = true;
+            }
+            break;
+        case _SOKOL_ANDROID_MSG_RESUME:
+            _SAPP_INFO(ANDROID_MSG_RESUME);
+            _sapp.android.has_resumed = true;
+            _sapp_android_app_event(SAPP_EVENTTYPE_RESUMED);
+            break;
+        case _SOKOL_ANDROID_MSG_PAUSE:
+            _SAPP_INFO(ANDROID_MSG_PAUSE);
+            _sapp.android.has_resumed = false;
+            _sapp_android_app_event(SAPP_EVENTTYPE_SUSPENDED);
+            break;
+        case _SOKOL_ANDROID_MSG_FOCUS:
+            _SAPP_INFO(ANDROID_MSG_FOCUS);
+            _sapp.android.has_focus = true;
+            break;
+        case _SOKOL_ANDROID_MSG_NO_FOCUS:
+            _SAPP_INFO(ANDROID_MSG_NO_FOCUS);
+            _sapp.android.has_focus = false;
+            break;
+        case _SOKOL_ANDROID_MSG_SET_NATIVE_WINDOW:
+            _SAPP_INFO(ANDROID_MSG_SET_NATIVE_WINDOW);
+            if (_sapp.android.current.window != _sapp.android.pending.window) {
+                if (_sapp.android.current.window != NULL) {
+                    _sapp_android_cleanup_egl_surface();
+                }
+                if (_sapp.android.pending.window != NULL) {
+                    if (_sapp_android_init_egl_surface(_sapp.android.pending.window)) {
+                        _sapp_android_update_dimensions(_sapp.android.pending.window, true);
+                    } else {
+                        _sapp_android_shutdown();
+                    }
+                }
+            }
+            _sapp.android.current.window = _sapp.android.pending.window;
+            break;
+        case _SOKOL_ANDROID_MSG_SET_INPUT_QUEUE:
+            _SAPP_INFO(ANDROID_MSG_SET_INPUT_QUEUE);
+            if (_sapp.android.current.input != _sapp.android.pending.input) {
+                if (_sapp.android.current.input != NULL) {
+                    AInputQueue_detachLooper(_sapp.android.current.input);
+                }
+                if (_sapp.android.pending.input != NULL) {
+                    AInputQueue_attachLooper(
+                        _sapp.android.pending.input,
+                        _sapp.android.looper,
+                        ALOOPER_POLL_CALLBACK,
+                        _sapp_android_input_cb,
+                        NULL); /* data */
+                }
+            }
+            _sapp.android.current.input = _sapp.android.pending.input;
+            break;
+        case _SOKOL_ANDROID_MSG_DESTROY:
+            _SAPP_INFO(ANDROID_MSG_DESTROY);
+            _sapp_android_cleanup();
+            _sapp.valid = false;
+            _sapp.android.is_thread_stopping = true;
+            break;
+        default:
+            _SAPP_WARN(ANDROID_UNKNOWN_MSG);
+            break;
+    }
+    pthread_cond_broadcast(&_sapp.android.pt.cond); /* signal "received" */
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+    return 1;
+}
+
+_SOKOL_PRIVATE bool _sapp_android_should_update(void) {
+    bool is_in_front = _sapp.android.has_resumed && _sapp.android.has_focus;
+    bool has_surface = _sapp.android.surface != EGL_NO_SURFACE;
+    return is_in_front && has_surface;
+}
+
+_SOKOL_PRIVATE void _sapp_android_show_keyboard(bool shown) {
+    SOKOL_ASSERT(_sapp.valid);
+    /* This seems to be broken in the NDK, but there is (a very cumbersome) workaround... */
+    if (shown) {
+        ANativeActivity_showSoftInput(_sapp.android.activity, ANATIVEACTIVITY_SHOW_SOFT_INPUT_FORCED);
+    } else {
+        ANativeActivity_hideSoftInput(_sapp.android.activity, ANATIVEACTIVITY_HIDE_SOFT_INPUT_NOT_ALWAYS);
+    }
+}
+
+_SOKOL_PRIVATE void* _sapp_android_loop(void* arg) {
+    _SOKOL_UNUSED(arg);
+    _SAPP_INFO(ANDROID_LOOP_THREAD_STARTED);
+
+    _sapp.android.looper = ALooper_prepare(0 /* or ALOOPER_PREPARE_ALLOW_NON_CALLBACKS*/);
+    ALooper_addFd(_sapp.android.looper,
+        _sapp.android.pt.read_from_main_fd,
+        ALOOPER_POLL_CALLBACK,
+        ALOOPER_EVENT_INPUT,
+        _sapp_android_main_cb,
+        NULL); /* data */
+
+    /* signal start to main thread */
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp.android.is_thread_started = true;
+    pthread_cond_broadcast(&_sapp.android.pt.cond);
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+
+    /* main loop */
+    while (!_sapp.android.is_thread_stopping) {
+        /* sokol frame */
+        if (_sapp_android_should_update()) {
+            _sapp_android_frame();
+        }
+
+        /* process all events (or stop early if app is requested to quit) */
+        bool process_events = true;
+        while (process_events && !_sapp.android.is_thread_stopping) {
+            bool block_until_event = !_sapp.android.is_thread_stopping && !_sapp_android_should_update();
+            process_events = ALooper_pollOnce(block_until_event ? -1 : 0, NULL, NULL, NULL) == ALOOPER_POLL_CALLBACK;
+        }
+    }
+
+    /* cleanup thread */
+    if (_sapp.android.current.input != NULL) {
+        AInputQueue_detachLooper(_sapp.android.current.input);
+    }
+
+    /* the following causes heap corruption on exit, why??
+    ALooper_removeFd(_sapp.android.looper, _sapp.android.pt.read_from_main_fd);
+    ALooper_release(_sapp.android.looper);*/
+
+    /* signal "destroyed" */
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp.android.is_thread_stopped = true;
+    pthread_cond_broadcast(&_sapp.android.pt.cond);
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+
+    _SAPP_INFO(ANDROID_LOOP_THREAD_DONE);
+    return NULL;
+}
+
+/* android main/ui thread */
+_SOKOL_PRIVATE void _sapp_android_msg(_sapp_android_msg_t msg) {
+    if (write(_sapp.android.pt.write_from_main_fd, &msg, sizeof(msg)) != sizeof(msg)) {
+        _SAPP_ERROR(ANDROID_WRITE_MSG_FAILED);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_start(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONSTART);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_resume(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONRESUME);
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_RESUME);
+}
+
+_SOKOL_PRIVATE void* _sapp_android_on_save_instance_state(ANativeActivity* activity, size_t* out_size) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONSAVEINSTANCESTATE);
+    *out_size = 0;
+    return NULL;
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_window_focus_changed(ANativeActivity* activity, int has_focus) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONWINDOWFOCUSCHANGED);
+    if (has_focus) {
+        _sapp_android_msg(_SOKOL_ANDROID_MSG_FOCUS);
+    } else {
+        _sapp_android_msg(_SOKOL_ANDROID_MSG_NO_FOCUS);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_pause(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONPAUSE);
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_PAUSE);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_stop(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONSTOP);
+}
+
+_SOKOL_PRIVATE void _sapp_android_msg_set_native_window(ANativeWindow* window) {
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp.android.pending.window = window;
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_SET_NATIVE_WINDOW);
+    while (_sapp.android.current.window != window) {
+        pthread_cond_wait(&_sapp.android.pt.cond, &_sapp.android.pt.mutex);
+    }
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_native_window_created(ANativeActivity* activity, ANativeWindow* window) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONNATIVEWINDOWCREATED);
+    _sapp_android_msg_set_native_window(window);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_native_window_destroyed(ANativeActivity* activity, ANativeWindow* window) {
+    _SOKOL_UNUSED(activity);
+    _SOKOL_UNUSED(window);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONNATIVEWINDOWDESTROYED);
+    _sapp_android_msg_set_native_window(NULL);
+}
+
+_SOKOL_PRIVATE void _sapp_android_msg_set_input_queue(AInputQueue* input) {
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp.android.pending.input = input;
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_SET_INPUT_QUEUE);
+    while (_sapp.android.current.input != input) {
+        pthread_cond_wait(&_sapp.android.pt.cond, &_sapp.android.pt.mutex);
+    }
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_input_queue_created(ANativeActivity* activity, AInputQueue* queue) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONINPUTQUEUECREATED);
+    _sapp_android_msg_set_input_queue(queue);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_input_queue_destroyed(ANativeActivity* activity, AInputQueue* queue) {
+    _SOKOL_UNUSED(activity);
+    _SOKOL_UNUSED(queue);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONINPUTQUEUEDESTROYED);
+    _sapp_android_msg_set_input_queue(NULL);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_config_changed(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONCONFIGURATIONCHANGED);
+    /* see android:configChanges in manifest */
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_low_memory(ANativeActivity* activity) {
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONLOWMEMORY);
+}
+
+_SOKOL_PRIVATE void _sapp_android_on_destroy(ANativeActivity* activity) {
+    /*
+     * For some reason even an empty app using nativeactivity.h will crash (WIN DEATH)
+     * on my device (Moto X 2nd gen) when the app is removed from the task view
+     * (TaskStackView: onTaskViewDismissed).
+     *
+     * However, if ANativeActivity_finish() is explicitly called from for example
+     * _sapp_android_on_stop(), the crash disappears. Is this a bug in NativeActivity?
+     */
+    _SOKOL_UNUSED(activity);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONDESTROY);
+
+    /* send destroy msg */
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_DESTROY);
+    while (!_sapp.android.is_thread_stopped) {
+        pthread_cond_wait(&_sapp.android.pt.cond, &_sapp.android.pt.mutex);
+    }
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+
+    /* clean up main thread */
+    pthread_cond_destroy(&_sapp.android.pt.cond);
+    pthread_mutex_destroy(&_sapp.android.pt.mutex);
+
+    close(_sapp.android.pt.read_from_main_fd);
+    close(_sapp.android.pt.write_from_main_fd);
+
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_DONE);
+
+    /* this is a bit naughty, but causes a clean restart of the app (static globals are reset) */
+    exit(0);
+}
+
+JNIEXPORT
+void ANativeActivity_onCreate(ANativeActivity* activity, void* saved_state, size_t saved_state_size) {
+    _SOKOL_UNUSED(saved_state);
+    _SOKOL_UNUSED(saved_state_size);
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_ONCREATE);
+
+    // the NativeActity pointer needs to be available inside sokol_main()
+    // (see https://github.com/floooh/sokol/issues/708), however _sapp_init_state()
+    // will clear the global _sapp_t struct, so we need to initialize the native
+    // activity pointer twice, once before sokol_main() and once after _sapp_init_state()
+    _sapp_clear(&_sapp, sizeof(_sapp));
+    _sapp.android.activity = activity;
+    sapp_desc desc = sokol_main(0, NULL);
+    _sapp_init_state(&desc);
+    _sapp.android.activity = activity;
+
+    int pipe_fd[2];
+    if (pipe(pipe_fd) != 0) {
+        _SAPP_ERROR(ANDROID_CREATE_THREAD_PIPE_FAILED);
+        return;
+    }
+    _sapp.android.pt.read_from_main_fd = pipe_fd[0];
+    _sapp.android.pt.write_from_main_fd = pipe_fd[1];
+
+    pthread_mutex_init(&_sapp.android.pt.mutex, NULL);
+    pthread_cond_init(&_sapp.android.pt.cond, NULL);
+
+    pthread_attr_t attr;
+    pthread_attr_init(&attr);
+    pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+    pthread_create(&_sapp.android.pt.thread, &attr, _sapp_android_loop, 0);
+    pthread_attr_destroy(&attr);
+
+    /* wait until main loop has started */
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    while (!_sapp.android.is_thread_started) {
+        pthread_cond_wait(&_sapp.android.pt.cond, &_sapp.android.pt.mutex);
+    }
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+
+    /* send create msg */
+    pthread_mutex_lock(&_sapp.android.pt.mutex);
+    _sapp_android_msg(_SOKOL_ANDROID_MSG_CREATE);
+    while (!_sapp.android.has_created) {
+        pthread_cond_wait(&_sapp.android.pt.cond, &_sapp.android.pt.mutex);
+    }
+    pthread_mutex_unlock(&_sapp.android.pt.mutex);
+
+    /* register for callbacks */
+    activity->callbacks->onStart = _sapp_android_on_start;
+    activity->callbacks->onResume = _sapp_android_on_resume;
+    activity->callbacks->onSaveInstanceState = _sapp_android_on_save_instance_state;
+    activity->callbacks->onWindowFocusChanged = _sapp_android_on_window_focus_changed;
+    activity->callbacks->onPause = _sapp_android_on_pause;
+    activity->callbacks->onStop = _sapp_android_on_stop;
+    activity->callbacks->onDestroy = _sapp_android_on_destroy;
+    activity->callbacks->onNativeWindowCreated = _sapp_android_on_native_window_created;
+    /* activity->callbacks->onNativeWindowResized = _sapp_android_on_native_window_resized; */
+    /* activity->callbacks->onNativeWindowRedrawNeeded = _sapp_android_on_native_window_redraw_needed; */
+    activity->callbacks->onNativeWindowDestroyed = _sapp_android_on_native_window_destroyed;
+    activity->callbacks->onInputQueueCreated = _sapp_android_on_input_queue_created;
+    activity->callbacks->onInputQueueDestroyed = _sapp_android_on_input_queue_destroyed;
+    /* activity->callbacks->onContentRectChanged = _sapp_android_on_content_rect_changed; */
+    activity->callbacks->onConfigurationChanged = _sapp_android_on_config_changed;
+    activity->callbacks->onLowMemory = _sapp_android_on_low_memory;
+
+    _SAPP_INFO(ANDROID_NATIVE_ACTIVITY_CREATE_SUCCESS);
+
+    /* NOT A BUG: do NOT call sapp_discard_state() */
+}
+
+#endif /* _SAPP_ANDROID */
+
+// ██      ██ ███    ██ ██    ██ ██   ██
+// ██      ██ ████   ██ ██    ██  ██ ██
+// ██      ██ ██ ██  ██ ██    ██   ███
+// ██      ██ ██  ██ ██ ██    ██  ██ ██
+// ███████ ██ ██   ████  ██████  ██   ██
+//
+// >>linux
+#if defined(_SAPP_LINUX)
+
+/* see GLFW's xkb_unicode.c */
+static const struct _sapp_x11_codepair {
+  uint16_t keysym;
+  uint16_t ucs;
+} _sapp_x11_keysymtab[] = {
+  { 0x01a1, 0x0104 },
+  { 0x01a2, 0x02d8 },
+  { 0x01a3, 0x0141 },
+  { 0x01a5, 0x013d },
+  { 0x01a6, 0x015a },
+  { 0x01a9, 0x0160 },
+  { 0x01aa, 0x015e },
+  { 0x01ab, 0x0164 },
+  { 0x01ac, 0x0179 },
+  { 0x01ae, 0x017d },
+  { 0x01af, 0x017b },
+  { 0x01b1, 0x0105 },
+  { 0x01b2, 0x02db },
+  { 0x01b3, 0x0142 },
+  { 0x01b5, 0x013e },
+  { 0x01b6, 0x015b },
+  { 0x01b7, 0x02c7 },
+  { 0x01b9, 0x0161 },
+  { 0x01ba, 0x015f },
+  { 0x01bb, 0x0165 },
+  { 0x01bc, 0x017a },
+  { 0x01bd, 0x02dd },
+  { 0x01be, 0x017e },
+  { 0x01bf, 0x017c },
+  { 0x01c0, 0x0154 },
+  { 0x01c3, 0x0102 },
+  { 0x01c5, 0x0139 },
+  { 0x01c6, 0x0106 },
+  { 0x01c8, 0x010c },
+  { 0x01ca, 0x0118 },
+  { 0x01cc, 0x011a },
+  { 0x01cf, 0x010e },
+  { 0x01d0, 0x0110 },
+  { 0x01d1, 0x0143 },
+  { 0x01d2, 0x0147 },
+  { 0x01d5, 0x0150 },
+  { 0x01d8, 0x0158 },
+  { 0x01d9, 0x016e },
+  { 0x01db, 0x0170 },
+  { 0x01de, 0x0162 },
+  { 0x01e0, 0x0155 },
+  { 0x01e3, 0x0103 },
+  { 0x01e5, 0x013a },
+  { 0x01e6, 0x0107 },
+  { 0x01e8, 0x010d },
+  { 0x01ea, 0x0119 },
+  { 0x01ec, 0x011b },
+  { 0x01ef, 0x010f },
+  { 0x01f0, 0x0111 },
+  { 0x01f1, 0x0144 },
+  { 0x01f2, 0x0148 },
+  { 0x01f5, 0x0151 },
+  { 0x01f8, 0x0159 },
+  { 0x01f9, 0x016f },
+  { 0x01fb, 0x0171 },
+  { 0x01fe, 0x0163 },
+  { 0x01ff, 0x02d9 },
+  { 0x02a1, 0x0126 },
+  { 0x02a6, 0x0124 },
+  { 0x02a9, 0x0130 },
+  { 0x02ab, 0x011e },
+  { 0x02ac, 0x0134 },
+  { 0x02b1, 0x0127 },
+  { 0x02b6, 0x0125 },
+  { 0x02b9, 0x0131 },
+  { 0x02bb, 0x011f },
+  { 0x02bc, 0x0135 },
+  { 0x02c5, 0x010a },
+  { 0x02c6, 0x0108 },
+  { 0x02d5, 0x0120 },
+  { 0x02d8, 0x011c },
+  { 0x02dd, 0x016c },
+  { 0x02de, 0x015c },
+  { 0x02e5, 0x010b },
+  { 0x02e6, 0x0109 },
+  { 0x02f5, 0x0121 },
+  { 0x02f8, 0x011d },
+  { 0x02fd, 0x016d },
+  { 0x02fe, 0x015d },
+  { 0x03a2, 0x0138 },
+  { 0x03a3, 0x0156 },
+  { 0x03a5, 0x0128 },
+  { 0x03a6, 0x013b },
+  { 0x03aa, 0x0112 },
+  { 0x03ab, 0x0122 },
+  { 0x03ac, 0x0166 },
+  { 0x03b3, 0x0157 },
+  { 0x03b5, 0x0129 },
+  { 0x03b6, 0x013c },
+  { 0x03ba, 0x0113 },
+  { 0x03bb, 0x0123 },
+  { 0x03bc, 0x0167 },
+  { 0x03bd, 0x014a },
+  { 0x03bf, 0x014b },
+  { 0x03c0, 0x0100 },
+  { 0x03c7, 0x012e },
+  { 0x03cc, 0x0116 },
+  { 0x03cf, 0x012a },
+  { 0x03d1, 0x0145 },
+  { 0x03d2, 0x014c },
+  { 0x03d3, 0x0136 },
+  { 0x03d9, 0x0172 },
+  { 0x03dd, 0x0168 },
+  { 0x03de, 0x016a },
+  { 0x03e0, 0x0101 },
+  { 0x03e7, 0x012f },
+  { 0x03ec, 0x0117 },
+  { 0x03ef, 0x012b },
+  { 0x03f1, 0x0146 },
+  { 0x03f2, 0x014d },
+  { 0x03f3, 0x0137 },
+  { 0x03f9, 0x0173 },
+  { 0x03fd, 0x0169 },
+  { 0x03fe, 0x016b },
+  { 0x047e, 0x203e },
+  { 0x04a1, 0x3002 },
+  { 0x04a2, 0x300c },
+  { 0x04a3, 0x300d },
+  { 0x04a4, 0x3001 },
+  { 0x04a5, 0x30fb },
+  { 0x04a6, 0x30f2 },
+  { 0x04a7, 0x30a1 },
+  { 0x04a8, 0x30a3 },
+  { 0x04a9, 0x30a5 },
+  { 0x04aa, 0x30a7 },
+  { 0x04ab, 0x30a9 },
+  { 0x04ac, 0x30e3 },
+  { 0x04ad, 0x30e5 },
+  { 0x04ae, 0x30e7 },
+  { 0x04af, 0x30c3 },
+  { 0x04b0, 0x30fc },
+  { 0x04b1, 0x30a2 },
+  { 0x04b2, 0x30a4 },
+  { 0x04b3, 0x30a6 },
+  { 0x04b4, 0x30a8 },
+  { 0x04b5, 0x30aa },
+  { 0x04b6, 0x30ab },
+  { 0x04b7, 0x30ad },
+  { 0x04b8, 0x30af },
+  { 0x04b9, 0x30b1 },
+  { 0x04ba, 0x30b3 },
+  { 0x04bb, 0x30b5 },
+  { 0x04bc, 0x30b7 },
+  { 0x04bd, 0x30b9 },
+  { 0x04be, 0x30bb },
+  { 0x04bf, 0x30bd },
+  { 0x04c0, 0x30bf },
+  { 0x04c1, 0x30c1 },
+  { 0x04c2, 0x30c4 },
+  { 0x04c3, 0x30c6 },
+  { 0x04c4, 0x30c8 },
+  { 0x04c5, 0x30ca },
+  { 0x04c6, 0x30cb },
+  { 0x04c7, 0x30cc },
+  { 0x04c8, 0x30cd },
+  { 0x04c9, 0x30ce },
+  { 0x04ca, 0x30cf },
+  { 0x04cb, 0x30d2 },
+  { 0x04cc, 0x30d5 },
+  { 0x04cd, 0x30d8 },
+  { 0x04ce, 0x30db },
+  { 0x04cf, 0x30de },
+  { 0x04d0, 0x30df },
+  { 0x04d1, 0x30e0 },
+  { 0x04d2, 0x30e1 },
+  { 0x04d3, 0x30e2 },
+  { 0x04d4, 0x30e4 },
+  { 0x04d5, 0x30e6 },
+  { 0x04d6, 0x30e8 },
+  { 0x04d7, 0x30e9 },
+  { 0x04d8, 0x30ea },
+  { 0x04d9, 0x30eb },
+  { 0x04da, 0x30ec },
+  { 0x04db, 0x30ed },
+  { 0x04dc, 0x30ef },
+  { 0x04dd, 0x30f3 },
+  { 0x04de, 0x309b },
+  { 0x04df, 0x309c },
+  { 0x05ac, 0x060c },
+  { 0x05bb, 0x061b },
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+  { 0x05c1, 0x0621 },
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+  { 0x05d5, 0x0635 },
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+  { 0x05e1, 0x0641 },
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+  { 0x05e5, 0x0645 },
+  { 0x05e6, 0x0646 },
+  { 0x05e7, 0x0647 },
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+  { 0x05ea, 0x064a },
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+  { 0x05ed, 0x064d },
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+  { 0x05f2, 0x0652 },
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+  { 0x06a2, 0x0453 },
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+  { 0x06a6, 0x0456 },
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+  { 0x06ac, 0x045c },
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+  { 0x06af, 0x045f },
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+  { 0x06b1, 0x0402 },
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+  { 0x06b3, 0x0401 },
+  { 0x06b4, 0x0404 },
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+  { 0x08a3, 0x2500 },
+  { 0x08a4, 0x2320 },
+  { 0x08a5, 0x2321 },
+  { 0x08a6, 0x2502 },
+  { 0x08a7, 0x23a1 },
+  { 0x08a8, 0x23a3 },
+  { 0x08a9, 0x23a4 },
+  { 0x08aa, 0x23a6 },
+  { 0x08ab, 0x239b },
+  { 0x08ac, 0x239d },
+  { 0x08ad, 0x239e },
+  { 0x08ae, 0x23a0 },
+  { 0x08af, 0x23a8 },
+  { 0x08b0, 0x23ac },
+  { 0x08bc, 0x2264 },
+  { 0x08bd, 0x2260 },
+  { 0x08be, 0x2265 },
+  { 0x08bf, 0x222b },
+  { 0x08c0, 0x2234 },
+  { 0x08c1, 0x221d },
+  { 0x08c2, 0x221e },
+  { 0x08c5, 0x2207 },
+  { 0x08c8, 0x223c },
+  { 0x08c9, 0x2243 },
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+  { 0x08ce, 0x21d2 },
+  { 0x08cf, 0x2261 },
+  { 0x08d6, 0x221a },
+  { 0x08da, 0x2282 },
+  { 0x08db, 0x2283 },
+  { 0x08dc, 0x2229 },
+  { 0x08dd, 0x222a },
+  { 0x08de, 0x2227 },
+  { 0x08df, 0x2228 },
+  { 0x08ef, 0x2202 },
+  { 0x08f6, 0x0192 },
+  { 0x08fb, 0x2190 },
+  { 0x08fc, 0x2191 },
+  { 0x08fd, 0x2192 },
+  { 0x08fe, 0x2193 },
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+  { 0x09e1, 0x2592 },
+  { 0x09e2, 0x2409 },
+  { 0x09e3, 0x240c },
+  { 0x09e4, 0x240d },
+  { 0x09e5, 0x240a },
+  { 0x09e8, 0x2424 },
+  { 0x09e9, 0x240b },
+  { 0x09ea, 0x2518 },
+  { 0x09eb, 0x2510 },
+  { 0x09ec, 0x250c },
+  { 0x09ed, 0x2514 },
+  { 0x09ee, 0x253c },
+  { 0x09ef, 0x23ba },
+  { 0x09f0, 0x23bb },
+  { 0x09f1, 0x2500 },
+  { 0x09f2, 0x23bc },
+  { 0x09f3, 0x23bd },
+  { 0x09f4, 0x251c },
+  { 0x09f5, 0x2524 },
+  { 0x09f6, 0x2534 },
+  { 0x09f7, 0x252c },
+  { 0x09f8, 0x2502 },
+  { 0x0aa1, 0x2003 },
+  { 0x0aa2, 0x2002 },
+  { 0x0aa3, 0x2004 },
+  { 0x0aa4, 0x2005 },
+  { 0x0aa5, 0x2007 },
+  { 0x0aa6, 0x2008 },
+  { 0x0aa7, 0x2009 },
+  { 0x0aa8, 0x200a },
+  { 0x0aa9, 0x2014 },
+  { 0x0aaa, 0x2013 },
+  { 0x0aae, 0x2026 },
+  { 0x0aaf, 0x2025 },
+  { 0x0ab0, 0x2153 },
+  { 0x0ab1, 0x2154 },
+  { 0x0ab2, 0x2155 },
+  { 0x0ab3, 0x2156 },
+  { 0x0ab4, 0x2157 },
+  { 0x0ab5, 0x2158 },
+  { 0x0ab6, 0x2159 },
+  { 0x0ab7, 0x215a },
+  { 0x0ab8, 0x2105 },
+  { 0x0abb, 0x2012 },
+  { 0x0abc, 0x2329 },
+  { 0x0abe, 0x232a },
+  { 0x0ac3, 0x215b },
+  { 0x0ac4, 0x215c },
+  { 0x0ac5, 0x215d },
+  { 0x0ac6, 0x215e },
+  { 0x0ac9, 0x2122 },
+  { 0x0aca, 0x2613 },
+  { 0x0acc, 0x25c1 },
+  { 0x0acd, 0x25b7 },
+  { 0x0ace, 0x25cb },
+  { 0x0acf, 0x25af },
+  { 0x0ad0, 0x2018 },
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+  { 0x0ad3, 0x201d },
+  { 0x0ad4, 0x211e },
+  { 0x0ad6, 0x2032 },
+  { 0x0ad7, 0x2033 },
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+  { 0x0adb, 0x25ac },
+  { 0x0adc, 0x25c0 },
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+  { 0x0ae0, 0x25e6 },
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+  { 0x0ae2, 0x25ad },
+  { 0x0ae3, 0x25b3 },
+  { 0x0ae4, 0x25bd },
+  { 0x0ae5, 0x2606 },
+  { 0x0ae6, 0x2022 },
+  { 0x0ae7, 0x25aa },
+  { 0x0ae8, 0x25b2 },
+  { 0x0ae9, 0x25bc },
+  { 0x0aea, 0x261c },
+  { 0x0aeb, 0x261e },
+  { 0x0aec, 0x2663 },
+  { 0x0aed, 0x2666 },
+  { 0x0aee, 0x2665 },
+  { 0x0af0, 0x2720 },
+  { 0x0af1, 0x2020 },
+  { 0x0af2, 0x2021 },
+  { 0x0af3, 0x2713 },
+  { 0x0af4, 0x2717 },
+  { 0x0af5, 0x266f },
+  { 0x0af6, 0x266d },
+  { 0x0af7, 0x2642 },
+  { 0x0af8, 0x2640 },
+  { 0x0af9, 0x260e },
+  { 0x0afa, 0x2315 },
+  { 0x0afb, 0x2117 },
+  { 0x0afc, 0x2038 },
+  { 0x0afd, 0x201a },
+  { 0x0afe, 0x201e },
+  { 0x0ba3, 0x003c },
+  { 0x0ba6, 0x003e },
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+  { 0x0ba9, 0x2227 },
+  { 0x0bc0, 0x00af },
+  { 0x0bc2, 0x22a5 },
+  { 0x0bc3, 0x2229 },
+  { 0x0bc4, 0x230a },
+  { 0x0bc6, 0x005f },
+  { 0x0bca, 0x2218 },
+  { 0x0bcc, 0x2395 },
+  { 0x0bce, 0x22a4 },
+  { 0x0bcf, 0x25cb },
+  { 0x0bd3, 0x2308 },
+  { 0x0bd6, 0x222a },
+  { 0x0bd8, 0x2283 },
+  { 0x0bda, 0x2282 },
+  { 0x0bdc, 0x22a2 },
+  { 0x0bfc, 0x22a3 },
+  { 0x0cdf, 0x2017 },
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+  { 0x0ce3, 0x05d3 },
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+  { 0x0ce6, 0x05d6 },
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+  { 0x0cea, 0x05da },
+  { 0x0ceb, 0x05db },
+  { 0x0cec, 0x05dc },
+  { 0x0ced, 0x05dd },
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+  { 0x0cf1, 0x05e1 },
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+  { 0x0cf3, 0x05e3 },
+  { 0x0cf4, 0x05e4 },
+  { 0x0cf5, 0x05e5 },
+  { 0x0cf6, 0x05e6 },
+  { 0x0cf7, 0x05e7 },
+  { 0x0cf8, 0x05e8 },
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+  { 0x0da3, 0x0e03 },
+  { 0x0da4, 0x0e04 },
+  { 0x0da5, 0x0e05 },
+  { 0x0da6, 0x0e06 },
+  { 0x0da7, 0x0e07 },
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+  { 0x0dab, 0x0e0b },
+  { 0x0dac, 0x0e0c },
+  { 0x0dad, 0x0e0d },
+  { 0x0dae, 0x0e0e },
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+  { 0x0db2, 0x0e12 },
+  { 0x0db3, 0x0e13 },
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+  { 0x0db6, 0x0e16 },
+  { 0x0db7, 0x0e17 },
+  { 0x0db8, 0x0e18 },
+  { 0x0db9, 0x0e19 },
+  { 0x0dba, 0x0e1a },
+  { 0x0dbb, 0x0e1b },
+  { 0x0dbc, 0x0e1c },
+  { 0x0dbd, 0x0e1d },
+  { 0x0dbe, 0x0e1e },
+  { 0x0dbf, 0x0e1f },
+  { 0x0dc0, 0x0e20 },
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+  { 0x0dc2, 0x0e22 },
+  { 0x0dc3, 0x0e23 },
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+  { 0x0dc5, 0x0e25 },
+  { 0x0dc6, 0x0e26 },
+  { 0x0dc7, 0x0e27 },
+  { 0x0dc8, 0x0e28 },
+  { 0x0dc9, 0x0e29 },
+  { 0x0dca, 0x0e2a },
+  { 0x0dcb, 0x0e2b },
+  { 0x0dcc, 0x0e2c },
+  { 0x0dcd, 0x0e2d },
+  { 0x0dce, 0x0e2e },
+  { 0x0dcf, 0x0e2f },
+  { 0x0dd0, 0x0e30 },
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+  { 0x0dd2, 0x0e32 },
+  { 0x0dd3, 0x0e33 },
+  { 0x0dd4, 0x0e34 },
+  { 0x0dd5, 0x0e35 },
+  { 0x0dd6, 0x0e36 },
+  { 0x0dd7, 0x0e37 },
+  { 0x0dd8, 0x0e38 },
+  { 0x0dd9, 0x0e39 },
+  { 0x0dda, 0x0e3a },
+  { 0x0ddf, 0x0e3f },
+  { 0x0de0, 0x0e40 },
+  { 0x0de1, 0x0e41 },
+  { 0x0de2, 0x0e42 },
+  { 0x0de3, 0x0e43 },
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+  { 0x0de5, 0x0e45 },
+  { 0x0de6, 0x0e46 },
+  { 0x0de7, 0x0e47 },
+  { 0x0de8, 0x0e48 },
+  { 0x0de9, 0x0e49 },
+  { 0x0dea, 0x0e4a },
+  { 0x0deb, 0x0e4b },
+  { 0x0dec, 0x0e4c },
+  { 0x0ded, 0x0e4d },
+  { 0x0df0, 0x0e50 },
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+  { 0x0df3, 0x0e53 },
+  { 0x0df4, 0x0e54 },
+  { 0x0df5, 0x0e55 },
+  { 0x0df6, 0x0e56 },
+  { 0x0df7, 0x0e57 },
+  { 0x0df8, 0x0e58 },
+  { 0x0df9, 0x0e59 },
+  { 0x0ea1, 0x3131 },
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+  { 0x0ea3, 0x3133 },
+  { 0x0ea4, 0x3134 },
+  { 0x0ea5, 0x3135 },
+  { 0x0ea6, 0x3136 },
+  { 0x0ea7, 0x3137 },
+  { 0x0ea8, 0x3138 },
+  { 0x0ea9, 0x3139 },
+  { 0x0eaa, 0x313a },
+  { 0x0eab, 0x313b },
+  { 0x0eac, 0x313c },
+  { 0x0ead, 0x313d },
+  { 0x0eae, 0x313e },
+  { 0x0eaf, 0x313f },
+  { 0x0eb0, 0x3140 },
+  { 0x0eb1, 0x3141 },
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+  { 0x0eb3, 0x3143 },
+  { 0x0eb4, 0x3144 },
+  { 0x0eb5, 0x3145 },
+  { 0x0eb6, 0x3146 },
+  { 0x0eb7, 0x3147 },
+  { 0x0eb8, 0x3148 },
+  { 0x0eb9, 0x3149 },
+  { 0x0eba, 0x314a },
+  { 0x0ebb, 0x314b },
+  { 0x0ebc, 0x314c },
+  { 0x0ebd, 0x314d },
+  { 0x0ebe, 0x314e },
+  { 0x0ebf, 0x314f },
+  { 0x0ec0, 0x3150 },
+  { 0x0ec1, 0x3151 },
+  { 0x0ec2, 0x3152 },
+  { 0x0ec3, 0x3153 },
+  { 0x0ec4, 0x3154 },
+  { 0x0ec5, 0x3155 },
+  { 0x0ec6, 0x3156 },
+  { 0x0ec7, 0x3157 },
+  { 0x0ec8, 0x3158 },
+  { 0x0ec9, 0x3159 },
+  { 0x0eca, 0x315a },
+  { 0x0ecb, 0x315b },
+  { 0x0ecc, 0x315c },
+  { 0x0ecd, 0x315d },
+  { 0x0ece, 0x315e },
+  { 0x0ecf, 0x315f },
+  { 0x0ed0, 0x3160 },
+  { 0x0ed1, 0x3161 },
+  { 0x0ed2, 0x3162 },
+  { 0x0ed3, 0x3163 },
+  { 0x0ed4, 0x11a8 },
+  { 0x0ed5, 0x11a9 },
+  { 0x0ed6, 0x11aa },
+  { 0x0ed7, 0x11ab },
+  { 0x0ed8, 0x11ac },
+  { 0x0ed9, 0x11ad },
+  { 0x0eda, 0x11ae },
+  { 0x0edb, 0x11af },
+  { 0x0edc, 0x11b0 },
+  { 0x0edd, 0x11b1 },
+  { 0x0ede, 0x11b2 },
+  { 0x0edf, 0x11b3 },
+  { 0x0ee0, 0x11b4 },
+  { 0x0ee1, 0x11b5 },
+  { 0x0ee2, 0x11b6 },
+  { 0x0ee3, 0x11b7 },
+  { 0x0ee4, 0x11b8 },
+  { 0x0ee5, 0x11b9 },
+  { 0x0ee6, 0x11ba },
+  { 0x0ee7, 0x11bb },
+  { 0x0ee8, 0x11bc },
+  { 0x0ee9, 0x11bd },
+  { 0x0eea, 0x11be },
+  { 0x0eeb, 0x11bf },
+  { 0x0eec, 0x11c0 },
+  { 0x0eed, 0x11c1 },
+  { 0x0eee, 0x11c2 },
+  { 0x0eef, 0x316d },
+  { 0x0ef0, 0x3171 },
+  { 0x0ef1, 0x3178 },
+  { 0x0ef2, 0x317f },
+  { 0x0ef3, 0x3181 },
+  { 0x0ef4, 0x3184 },
+  { 0x0ef5, 0x3186 },
+  { 0x0ef6, 0x318d },
+  { 0x0ef7, 0x318e },
+  { 0x0ef8, 0x11eb },
+  { 0x0ef9, 0x11f0 },
+  { 0x0efa, 0x11f9 },
+  { 0x0eff, 0x20a9 },
+  { 0x13a4, 0x20ac },
+  { 0x13bc, 0x0152 },
+  { 0x13bd, 0x0153 },
+  { 0x13be, 0x0178 },
+  { 0x20ac, 0x20ac },
+  { 0xfe50,    '`' },
+  { 0xfe51, 0x00b4 },
+  { 0xfe52,    '^' },
+  { 0xfe53,    '~' },
+  { 0xfe54, 0x00af },
+  { 0xfe55, 0x02d8 },
+  { 0xfe56, 0x02d9 },
+  { 0xfe57, 0x00a8 },
+  { 0xfe58, 0x02da },
+  { 0xfe59, 0x02dd },
+  { 0xfe5a, 0x02c7 },
+  { 0xfe5b, 0x00b8 },
+  { 0xfe5c, 0x02db },
+  { 0xfe5d, 0x037a },
+  { 0xfe5e, 0x309b },
+  { 0xfe5f, 0x309c },
+  { 0xfe63,    '/' },
+  { 0xfe64, 0x02bc },
+  { 0xfe65, 0x02bd },
+  { 0xfe66, 0x02f5 },
+  { 0xfe67, 0x02f3 },
+  { 0xfe68, 0x02cd },
+  { 0xfe69, 0xa788 },
+  { 0xfe6a, 0x02f7 },
+  { 0xfe6e,    ',' },
+  { 0xfe6f, 0x00a4 },
+  { 0xfe80,    'a' }, /* XK_dead_a */
+  { 0xfe81,    'A' }, /* XK_dead_A */
+  { 0xfe82,    'e' }, /* XK_dead_e */
+  { 0xfe83,    'E' }, /* XK_dead_E */
+  { 0xfe84,    'i' }, /* XK_dead_i */
+  { 0xfe85,    'I' }, /* XK_dead_I */
+  { 0xfe86,    'o' }, /* XK_dead_o */
+  { 0xfe87,    'O' }, /* XK_dead_O */
+  { 0xfe88,    'u' }, /* XK_dead_u */
+  { 0xfe89,    'U' }, /* XK_dead_U */
+  { 0xfe8a, 0x0259 },
+  { 0xfe8b, 0x018f },
+  { 0xfe8c, 0x00b5 },
+  { 0xfe90,    '_' },
+  { 0xfe91, 0x02c8 },
+  { 0xfe92, 0x02cc },
+  { 0xff80 /*XKB_KEY_KP_Space*/,     ' ' },
+  { 0xff95 /*XKB_KEY_KP_7*/, 0x0037 },
+  { 0xff96 /*XKB_KEY_KP_4*/, 0x0034 },
+  { 0xff97 /*XKB_KEY_KP_8*/, 0x0038 },
+  { 0xff98 /*XKB_KEY_KP_6*/, 0x0036 },
+  { 0xff99 /*XKB_KEY_KP_2*/, 0x0032 },
+  { 0xff9a /*XKB_KEY_KP_9*/, 0x0039 },
+  { 0xff9b /*XKB_KEY_KP_3*/, 0x0033 },
+  { 0xff9c /*XKB_KEY_KP_1*/, 0x0031 },
+  { 0xff9d /*XKB_KEY_KP_5*/, 0x0035 },
+  { 0xff9e /*XKB_KEY_KP_0*/, 0x0030 },
+  { 0xffaa /*XKB_KEY_KP_Multiply*/,  '*' },
+  { 0xffab /*XKB_KEY_KP_Add*/,       '+' },
+  { 0xffac /*XKB_KEY_KP_Separator*/, ',' },
+  { 0xffad /*XKB_KEY_KP_Subtract*/,  '-' },
+  { 0xffae /*XKB_KEY_KP_Decimal*/,   '.' },
+  { 0xffaf /*XKB_KEY_KP_Divide*/,    '/' },
+  { 0xffb0 /*XKB_KEY_KP_0*/, 0x0030 },
+  { 0xffb1 /*XKB_KEY_KP_1*/, 0x0031 },
+  { 0xffb2 /*XKB_KEY_KP_2*/, 0x0032 },
+  { 0xffb3 /*XKB_KEY_KP_3*/, 0x0033 },
+  { 0xffb4 /*XKB_KEY_KP_4*/, 0x0034 },
+  { 0xffb5 /*XKB_KEY_KP_5*/, 0x0035 },
+  { 0xffb6 /*XKB_KEY_KP_6*/, 0x0036 },
+  { 0xffb7 /*XKB_KEY_KP_7*/, 0x0037 },
+  { 0xffb8 /*XKB_KEY_KP_8*/, 0x0038 },
+  { 0xffb9 /*XKB_KEY_KP_9*/, 0x0039 },
+  { 0xffbd /*XKB_KEY_KP_Equal*/,     '=' }
+};
+
+_SOKOL_PRIVATE int _sapp_x11_error_handler(Display* display, XErrorEvent* event) {
+    _SOKOL_UNUSED(display);
+    _sapp.x11.error_code = event->error_code;
+    return 0;
+}
+
+_SOKOL_PRIVATE void _sapp_x11_grab_error_handler(void) {
+    _sapp.x11.error_code = Success;
+    XSetErrorHandler(_sapp_x11_error_handler);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_release_error_handler(void) {
+    XSync(_sapp.x11.display, False);
+    XSetErrorHandler(NULL);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_init_extensions(void) {
+    _sapp.x11.UTF8_STRING             = XInternAtom(_sapp.x11.display, "UTF8_STRING", False);
+    _sapp.x11.WM_PROTOCOLS            = XInternAtom(_sapp.x11.display, "WM_PROTOCOLS", False);
+    _sapp.x11.WM_DELETE_WINDOW        = XInternAtom(_sapp.x11.display, "WM_DELETE_WINDOW", False);
+    _sapp.x11.WM_STATE                = XInternAtom(_sapp.x11.display, "WM_STATE", False);
+    _sapp.x11.NET_WM_NAME             = XInternAtom(_sapp.x11.display, "_NET_WM_NAME", False);
+    _sapp.x11.NET_WM_ICON_NAME        = XInternAtom(_sapp.x11.display, "_NET_WM_ICON_NAME", False);
+    _sapp.x11.NET_WM_ICON             = XInternAtom(_sapp.x11.display, "_NET_WM_ICON", False);
+    _sapp.x11.NET_WM_STATE            = XInternAtom(_sapp.x11.display, "_NET_WM_STATE", False);
+    _sapp.x11.NET_WM_STATE_FULLSCREEN = XInternAtom(_sapp.x11.display, "_NET_WM_STATE_FULLSCREEN", False);
+    if (_sapp.drop.enabled) {
+        _sapp.x11.xdnd.XdndAware        = XInternAtom(_sapp.x11.display, "XdndAware", False);
+        _sapp.x11.xdnd.XdndEnter        = XInternAtom(_sapp.x11.display, "XdndEnter", False);
+        _sapp.x11.xdnd.XdndPosition     = XInternAtom(_sapp.x11.display, "XdndPosition", False);
+        _sapp.x11.xdnd.XdndStatus       = XInternAtom(_sapp.x11.display, "XdndStatus", False);
+        _sapp.x11.xdnd.XdndActionCopy   = XInternAtom(_sapp.x11.display, "XdndActionCopy", False);
+        _sapp.x11.xdnd.XdndDrop         = XInternAtom(_sapp.x11.display, "XdndDrop", False);
+        _sapp.x11.xdnd.XdndFinished     = XInternAtom(_sapp.x11.display, "XdndFinished", False);
+        _sapp.x11.xdnd.XdndSelection    = XInternAtom(_sapp.x11.display, "XdndSelection", False);
+        _sapp.x11.xdnd.XdndTypeList     = XInternAtom(_sapp.x11.display, "XdndTypeList", False);
+        _sapp.x11.xdnd.text_uri_list    = XInternAtom(_sapp.x11.display, "text/uri-list", False);
+    }
+
+    /* check Xi extension for raw mouse input */
+    if (XQueryExtension(_sapp.x11.display, "XInputExtension", &_sapp.x11.xi.major_opcode, &_sapp.x11.xi.event_base, &_sapp.x11.xi.error_base)) {
+        _sapp.x11.xi.major = 2;
+        _sapp.x11.xi.minor = 0;
+        if (XIQueryVersion(_sapp.x11.display, &_sapp.x11.xi.major, &_sapp.x11.xi.minor) == Success) {
+            _sapp.x11.xi.available = true;
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_query_system_dpi(void) {
+    /* from GLFW:
+
+       NOTE: Default to the display-wide DPI as we don't currently have a policy
+             for which monitor a window is considered to be on
+
+        _sapp.x11.dpi = DisplayWidth(_sapp.x11.display, _sapp.x11.screen) *
+                        25.4f / DisplayWidthMM(_sapp.x11.display, _sapp.x11.screen);
+
+       NOTE: Basing the scale on Xft.dpi where available should provide the most
+             consistent user experience (matches Qt, Gtk, etc), although not
+             always the most accurate one
+    */
+    bool dpi_ok = false;
+    char* rms = XResourceManagerString(_sapp.x11.display);
+    if (rms) {
+        XrmDatabase db = XrmGetStringDatabase(rms);
+        if (db) {
+            XrmValue value;
+            char* type = NULL;
+            if (XrmGetResource(db, "Xft.dpi", "Xft.Dpi", &type, &value)) {
+                if (type && strcmp(type, "String") == 0) {
+                    _sapp.x11.dpi = atof(value.addr);
+                    dpi_ok = true;
+                }
+            }
+            XrmDestroyDatabase(db);
+        }
+    }
+    // fallback if querying DPI had failed: assume the standard DPI 96.0f
+    if (!dpi_ok) {
+        _sapp.x11.dpi = 96.0f;
+        _SAPP_WARN(LINUX_X11_QUERY_SYSTEM_DPI_FAILED);
+    }
+}
+
+#if defined(_SAPP_GLX)
+
+_SOKOL_PRIVATE bool _sapp_glx_has_ext(const char* ext, const char* extensions) {
+    SOKOL_ASSERT(ext);
+    const char* start = extensions;
+    while (true) {
+        const char* where = strstr(start, ext);
+        if (!where) {
+            return false;
+        }
+        const char* terminator = where + strlen(ext);
+        if ((where == start) || (*(where - 1) == ' ')) {
+            if (*terminator == ' ' || *terminator == '\0') {
+                break;
+            }
+        }
+        start = terminator;
+    }
+    return true;
+}
+
+_SOKOL_PRIVATE bool _sapp_glx_extsupported(const char* ext, const char* extensions) {
+    if (extensions) {
+        return _sapp_glx_has_ext(ext, extensions);
+    }
+    else {
+        return false;
+    }
+}
+
+_SOKOL_PRIVATE void* _sapp_glx_getprocaddr(const char* procname)
+{
+    if (_sapp.glx.GetProcAddress) {
+        return (void*) _sapp.glx.GetProcAddress(procname);
+    }
+    else if (_sapp.glx.GetProcAddressARB) {
+        return (void*) _sapp.glx.GetProcAddressARB(procname);
+    }
+    else {
+        return dlsym(_sapp.glx.libgl, procname);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_glx_init() {
+    const char* sonames[] = { "libGL.so.1", "libGL.so", 0 };
+    for (int i = 0; sonames[i]; i++) {
+        _sapp.glx.libgl = dlopen(sonames[i], RTLD_LAZY|RTLD_GLOBAL);
+        if (_sapp.glx.libgl) {
+            break;
+        }
+    }
+    if (!_sapp.glx.libgl) {
+        _SAPP_PANIC(LINUX_GLX_LOAD_LIBGL_FAILED);
+    }
+    _sapp.glx.GetFBConfigs          = (PFNGLXGETFBCONFIGSPROC)          dlsym(_sapp.glx.libgl, "glXGetFBConfigs");
+    _sapp.glx.GetFBConfigAttrib     = (PFNGLXGETFBCONFIGATTRIBPROC)     dlsym(_sapp.glx.libgl, "glXGetFBConfigAttrib");
+    _sapp.glx.GetClientString       = (PFNGLXGETCLIENTSTRINGPROC)       dlsym(_sapp.glx.libgl, "glXGetClientString");
+    _sapp.glx.QueryExtension        = (PFNGLXQUERYEXTENSIONPROC)        dlsym(_sapp.glx.libgl, "glXQueryExtension");
+    _sapp.glx.QueryVersion          = (PFNGLXQUERYVERSIONPROC)          dlsym(_sapp.glx.libgl, "glXQueryVersion");
+    _sapp.glx.DestroyContext        = (PFNGLXDESTROYCONTEXTPROC)        dlsym(_sapp.glx.libgl, "glXDestroyContext");
+    _sapp.glx.MakeCurrent           = (PFNGLXMAKECURRENTPROC)           dlsym(_sapp.glx.libgl, "glXMakeCurrent");
+    _sapp.glx.SwapBuffers           = (PFNGLXSWAPBUFFERSPROC)           dlsym(_sapp.glx.libgl, "glXSwapBuffers");
+    _sapp.glx.QueryExtensionsString = (PFNGLXQUERYEXTENSIONSSTRINGPROC) dlsym(_sapp.glx.libgl, "glXQueryExtensionsString");
+    _sapp.glx.CreateWindow          = (PFNGLXCREATEWINDOWPROC)          dlsym(_sapp.glx.libgl, "glXCreateWindow");
+    _sapp.glx.DestroyWindow         = (PFNGLXDESTROYWINDOWPROC)         dlsym(_sapp.glx.libgl, "glXDestroyWindow");
+    _sapp.glx.GetProcAddress        = (PFNGLXGETPROCADDRESSPROC)        dlsym(_sapp.glx.libgl, "glXGetProcAddress");
+    _sapp.glx.GetProcAddressARB     = (PFNGLXGETPROCADDRESSPROC)        dlsym(_sapp.glx.libgl, "glXGetProcAddressARB");
+    _sapp.glx.GetVisualFromFBConfig = (PFNGLXGETVISUALFROMFBCONFIGPROC) dlsym(_sapp.glx.libgl, "glXGetVisualFromFBConfig");
+    if (!_sapp.glx.GetFBConfigs ||
+        !_sapp.glx.GetFBConfigAttrib ||
+        !_sapp.glx.GetClientString ||
+        !_sapp.glx.QueryExtension ||
+        !_sapp.glx.QueryVersion ||
+        !_sapp.glx.DestroyContext ||
+        !_sapp.glx.MakeCurrent ||
+        !_sapp.glx.SwapBuffers ||
+        !_sapp.glx.QueryExtensionsString ||
+        !_sapp.glx.CreateWindow ||
+        !_sapp.glx.DestroyWindow ||
+        !_sapp.glx.GetProcAddress ||
+        !_sapp.glx.GetProcAddressARB ||
+        !_sapp.glx.GetVisualFromFBConfig)
+    {
+        _SAPP_PANIC(LINUX_GLX_LOAD_ENTRY_POINTS_FAILED);
+    }
+
+    if (!_sapp.glx.QueryExtension(_sapp.x11.display, &_sapp.glx.error_base, &_sapp.glx.event_base)) {
+        _SAPP_PANIC(LINUX_GLX_EXTENSION_NOT_FOUND);
+    }
+    if (!_sapp.glx.QueryVersion(_sapp.x11.display, &_sapp.glx.major, &_sapp.glx.minor)) {
+        _SAPP_PANIC(LINUX_GLX_QUERY_VERSION_FAILED);
+    }
+    if (_sapp.glx.major == 1 && _sapp.glx.minor < 3) {
+        _SAPP_PANIC(LINUX_GLX_VERSION_TOO_LOW);
+    }
+    const char* exts = _sapp.glx.QueryExtensionsString(_sapp.x11.display, _sapp.x11.screen);
+    if (_sapp_glx_extsupported("GLX_EXT_swap_control", exts)) {
+        _sapp.glx.SwapIntervalEXT = (PFNGLXSWAPINTERVALEXTPROC) _sapp_glx_getprocaddr("glXSwapIntervalEXT");
+        _sapp.glx.EXT_swap_control = 0 != _sapp.glx.SwapIntervalEXT;
+    }
+    if (_sapp_glx_extsupported("GLX_MESA_swap_control", exts)) {
+        _sapp.glx.SwapIntervalMESA = (PFNGLXSWAPINTERVALMESAPROC) _sapp_glx_getprocaddr("glXSwapIntervalMESA");
+        _sapp.glx.MESA_swap_control = 0 != _sapp.glx.SwapIntervalMESA;
+    }
+    _sapp.glx.ARB_multisample = _sapp_glx_extsupported("GLX_ARB_multisample", exts);
+    if (_sapp_glx_extsupported("GLX_ARB_create_context", exts)) {
+        _sapp.glx.CreateContextAttribsARB = (PFNGLXCREATECONTEXTATTRIBSARBPROC) _sapp_glx_getprocaddr("glXCreateContextAttribsARB");
+        _sapp.glx.ARB_create_context = 0 != _sapp.glx.CreateContextAttribsARB;
+    }
+    _sapp.glx.ARB_create_context_profile = _sapp_glx_extsupported("GLX_ARB_create_context_profile", exts);
+}
+
+_SOKOL_PRIVATE int _sapp_glx_attrib(GLXFBConfig fbconfig, int attrib) {
+    int value;
+    _sapp.glx.GetFBConfigAttrib(_sapp.x11.display, fbconfig, attrib, &value);
+    return value;
+}
+
+_SOKOL_PRIVATE GLXFBConfig _sapp_glx_choosefbconfig() {
+    GLXFBConfig* native_configs;
+    _sapp_gl_fbconfig* usable_configs;
+    const _sapp_gl_fbconfig* closest;
+    int i, native_count, usable_count;
+    const char* vendor;
+    bool trust_window_bit = true;
+
+    /* HACK: This is a (hopefully temporary) workaround for Chromium
+           (VirtualBox GL) not setting the window bit on any GLXFBConfigs
+    */
+    vendor = _sapp.glx.GetClientString(_sapp.x11.display, GLX_VENDOR);
+    if (vendor && strcmp(vendor, "Chromium") == 0) {
+        trust_window_bit = false;
+    }
+
+    native_configs = _sapp.glx.GetFBConfigs(_sapp.x11.display, _sapp.x11.screen, &native_count);
+    if (!native_configs || !native_count) {
+        _SAPP_PANIC(LINUX_GLX_NO_GLXFBCONFIGS);
+    }
+
+    usable_configs = (_sapp_gl_fbconfig*) _sapp_malloc_clear((size_t)native_count * sizeof(_sapp_gl_fbconfig));
+    usable_count = 0;
+    for (i = 0;  i < native_count;  i++) {
+        const GLXFBConfig n = native_configs[i];
+        _sapp_gl_fbconfig* u = usable_configs + usable_count;
+        _sapp_gl_init_fbconfig(u);
+
+        /* Only consider RGBA GLXFBConfigs */
+        if (0 == (_sapp_glx_attrib(n, GLX_RENDER_TYPE) & GLX_RGBA_BIT)) {
+            continue;
+        }
+        /* Only consider window GLXFBConfigs */
+        if (0 == (_sapp_glx_attrib(n, GLX_DRAWABLE_TYPE) & GLX_WINDOW_BIT)) {
+            if (trust_window_bit) {
+                continue;
+            }
+        }
+        u->red_bits = _sapp_glx_attrib(n, GLX_RED_SIZE);
+        u->green_bits = _sapp_glx_attrib(n, GLX_GREEN_SIZE);
+        u->blue_bits = _sapp_glx_attrib(n, GLX_BLUE_SIZE);
+        u->alpha_bits = _sapp_glx_attrib(n, GLX_ALPHA_SIZE);
+        u->depth_bits = _sapp_glx_attrib(n, GLX_DEPTH_SIZE);
+        u->stencil_bits = _sapp_glx_attrib(n, GLX_STENCIL_SIZE);
+        if (_sapp_glx_attrib(n, GLX_DOUBLEBUFFER)) {
+            u->doublebuffer = true;
+        }
+        if (_sapp.glx.ARB_multisample) {
+            u->samples = _sapp_glx_attrib(n, GLX_SAMPLES);
+        }
+        u->handle = (uintptr_t) n;
+        usable_count++;
+    }
+    _sapp_gl_fbconfig desired;
+    _sapp_gl_init_fbconfig(&desired);
+    desired.red_bits = 8;
+    desired.green_bits = 8;
+    desired.blue_bits = 8;
+    desired.alpha_bits = 8;
+    desired.depth_bits = 24;
+    desired.stencil_bits = 8;
+    desired.doublebuffer = true;
+    desired.samples = _sapp.sample_count > 1 ? _sapp.sample_count : 0;
+    closest = _sapp_gl_choose_fbconfig(&desired, usable_configs, usable_count);
+    GLXFBConfig result = 0;
+    if (closest) {
+        result = (GLXFBConfig) closest->handle;
+    }
+    XFree(native_configs);
+    _sapp_free(usable_configs);
+    return result;
+}
+
+_SOKOL_PRIVATE void _sapp_glx_choose_visual(Visual** visual, int* depth) {
+    GLXFBConfig native = _sapp_glx_choosefbconfig();
+    if (0 == native) {
+        _SAPP_PANIC(LINUX_GLX_NO_SUITABLE_GLXFBCONFIG);
+    }
+    XVisualInfo* result = _sapp.glx.GetVisualFromFBConfig(_sapp.x11.display, native);
+    if (!result) {
+        _SAPP_PANIC(LINUX_GLX_GET_VISUAL_FROM_FBCONFIG_FAILED);
+    }
+    *visual = result->visual;
+    *depth = result->depth;
+    XFree(result);
+}
+
+_SOKOL_PRIVATE void _sapp_glx_create_context(void) {
+    GLXFBConfig native = _sapp_glx_choosefbconfig();
+    if (0 == native){
+        _SAPP_PANIC(LINUX_GLX_NO_SUITABLE_GLXFBCONFIG);
+    }
+    if (!(_sapp.glx.ARB_create_context && _sapp.glx.ARB_create_context_profile)) {
+        _SAPP_PANIC(LINUX_GLX_REQUIRED_EXTENSIONS_MISSING);
+    }
+    _sapp_x11_grab_error_handler();
+    const int attribs[] = {
+        GLX_CONTEXT_MAJOR_VERSION_ARB, _sapp.desc.gl_major_version,
+        GLX_CONTEXT_MINOR_VERSION_ARB, _sapp.desc.gl_minor_version,
+        GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
+        GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+        0, 0
+    };
+    _sapp.glx.ctx = _sapp.glx.CreateContextAttribsARB(_sapp.x11.display, native, NULL, True, attribs);
+    if (!_sapp.glx.ctx) {
+        _SAPP_PANIC(LINUX_GLX_CREATE_CONTEXT_FAILED);
+    }
+    _sapp_x11_release_error_handler();
+    _sapp.glx.window = _sapp.glx.CreateWindow(_sapp.x11.display, native, _sapp.x11.window, NULL);
+    if (!_sapp.glx.window) {
+        _SAPP_PANIC(LINUX_GLX_CREATE_WINDOW_FAILED);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_glx_destroy_context(void) {
+    if (_sapp.glx.window) {
+        _sapp.glx.DestroyWindow(_sapp.x11.display, _sapp.glx.window);
+        _sapp.glx.window = 0;
+    }
+    if (_sapp.glx.ctx) {
+        _sapp.glx.DestroyContext(_sapp.x11.display, _sapp.glx.ctx);
+        _sapp.glx.ctx = 0;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_glx_make_current(void) {
+    _sapp.glx.MakeCurrent(_sapp.x11.display, _sapp.glx.window, _sapp.glx.ctx);
+}
+
+_SOKOL_PRIVATE void _sapp_glx_swap_buffers(void) {
+    _sapp.glx.SwapBuffers(_sapp.x11.display, _sapp.glx.window);
+}
+
+_SOKOL_PRIVATE void _sapp_glx_swapinterval(int interval) {
+    _sapp_glx_make_current();
+    if (_sapp.glx.EXT_swap_control) {
+        _sapp.glx.SwapIntervalEXT(_sapp.x11.display, _sapp.glx.window, interval);
+    }
+    else if (_sapp.glx.MESA_swap_control) {
+        _sapp.glx.SwapIntervalMESA(interval);
+    }
+}
+
+#endif /* _SAPP_GLX */
+
+_SOKOL_PRIVATE void _sapp_x11_send_event(Atom type, int a, int b, int c, int d, int e) {
+    XEvent event;
+    _sapp_clear(&event, sizeof(event));
+
+    event.type = ClientMessage;
+    event.xclient.window = _sapp.x11.window;
+    event.xclient.format = 32;
+    event.xclient.message_type = type;
+    event.xclient.data.l[0] = a;
+    event.xclient.data.l[1] = b;
+    event.xclient.data.l[2] = c;
+    event.xclient.data.l[3] = d;
+    event.xclient.data.l[4] = e;
+
+    XSendEvent(_sapp.x11.display, _sapp.x11.root,
+               False,
+               SubstructureNotifyMask | SubstructureRedirectMask,
+               &event);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_query_window_size(void) {
+    XWindowAttributes attribs;
+    XGetWindowAttributes(_sapp.x11.display, _sapp.x11.window, &attribs);
+    _sapp.window_width = attribs.width;
+    _sapp.window_height = attribs.height;
+    _sapp.framebuffer_width = _sapp.window_width;
+    _sapp.framebuffer_height = _sapp.window_height;
+}
+
+_SOKOL_PRIVATE void _sapp_x11_set_fullscreen(bool enable) {
+    /* NOTE: this function must be called after XMapWindow (which happens in _sapp_x11_show_window()) */
+    if (_sapp.x11.NET_WM_STATE && _sapp.x11.NET_WM_STATE_FULLSCREEN) {
+        if (enable) {
+            const int _NET_WM_STATE_ADD = 1;
+            _sapp_x11_send_event(_sapp.x11.NET_WM_STATE,
+                                _NET_WM_STATE_ADD,
+                                _sapp.x11.NET_WM_STATE_FULLSCREEN,
+                                0, 1, 0);
+        }
+        else {
+            const int _NET_WM_STATE_REMOVE = 0;
+            _sapp_x11_send_event(_sapp.x11.NET_WM_STATE,
+                                _NET_WM_STATE_REMOVE,
+                                _sapp.x11.NET_WM_STATE_FULLSCREEN,
+                                0, 1, 0);
+        }
+    }
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_create_hidden_cursor(void) {
+    SOKOL_ASSERT(0 == _sapp.x11.hidden_cursor);
+    const int w = 16;
+    const int h = 16;
+    XcursorImage* img = XcursorImageCreate(w, h);
+    SOKOL_ASSERT(img && (img->width == 16) && (img->height == 16) && img->pixels);
+    img->xhot = 0;
+    img->yhot = 0;
+    const size_t num_bytes = (size_t)(w * h) * sizeof(XcursorPixel);
+    _sapp_clear(img->pixels, num_bytes);
+    _sapp.x11.hidden_cursor = XcursorImageLoadCursor(_sapp.x11.display, img);
+    XcursorImageDestroy(img);
+}
+
+ _SOKOL_PRIVATE void _sapp_x11_create_standard_cursor(sapp_mouse_cursor cursor, const char* name, const char* theme, int size, uint32_t fallback_native) {
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    SOKOL_ASSERT(_sapp.x11.display);
+    if (theme) {
+        XcursorImage* img = XcursorLibraryLoadImage(name, theme, size);
+        if (img) {
+            _sapp.x11.cursors[cursor] = XcursorImageLoadCursor(_sapp.x11.display, img);
+            XcursorImageDestroy(img);
+        }
+    }
+    if (0 == _sapp.x11.cursors[cursor]) {
+        _sapp.x11.cursors[cursor] = XCreateFontCursor(_sapp.x11.display, fallback_native);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_create_cursors(void) {
+    SOKOL_ASSERT(_sapp.x11.display);
+    const char* cursor_theme = XcursorGetTheme(_sapp.x11.display);
+    const int size = XcursorGetDefaultSize(_sapp.x11.display);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_ARROW, "default", cursor_theme, size, XC_left_ptr);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_IBEAM, "text", cursor_theme, size, XC_xterm);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_CROSSHAIR, "crosshair", cursor_theme, size, XC_crosshair);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_POINTING_HAND, "pointer", cursor_theme, size, XC_hand2);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_RESIZE_EW, "ew-resize", cursor_theme, size, XC_sb_h_double_arrow);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_RESIZE_NS, "ns-resize", cursor_theme, size, XC_sb_v_double_arrow);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_RESIZE_NWSE, "nwse-resize", cursor_theme, size, 0);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_RESIZE_NESW, "nesw-resize", cursor_theme, size, 0);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_RESIZE_ALL, "all-scroll", cursor_theme, size, XC_fleur);
+    _sapp_x11_create_standard_cursor(SAPP_MOUSECURSOR_NOT_ALLOWED, "no-allowed", cursor_theme, size, 0);
+    _sapp_x11_create_hidden_cursor();
+}
+
+_SOKOL_PRIVATE void _sapp_x11_destroy_cursors(void) {
+    SOKOL_ASSERT(_sapp.x11.display);
+    if (_sapp.x11.hidden_cursor) {
+        XFreeCursor(_sapp.x11.display, _sapp.x11.hidden_cursor);
+        _sapp.x11.hidden_cursor = 0;
+    }
+    for (int i = 0; i < _SAPP_MOUSECURSOR_NUM; i++) {
+        if (_sapp.x11.cursors[i]) {
+            XFreeCursor(_sapp.x11.display, _sapp.x11.cursors[i]);
+            _sapp.x11.cursors[i] = 0;
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_toggle_fullscreen(void) {
+    _sapp.fullscreen = !_sapp.fullscreen;
+    _sapp_x11_set_fullscreen(_sapp.fullscreen);
+    _sapp_x11_query_window_size();
+}
+
+_SOKOL_PRIVATE void _sapp_x11_update_cursor(sapp_mouse_cursor cursor, bool shown) {
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    if (shown) {
+        if (_sapp.x11.cursors[cursor]) {
+            XDefineCursor(_sapp.x11.display, _sapp.x11.window, _sapp.x11.cursors[cursor]);
+        }
+        else {
+            XUndefineCursor(_sapp.x11.display, _sapp.x11.window);
+        }
+    }
+    else {
+        XDefineCursor(_sapp.x11.display, _sapp.x11.window, _sapp.x11.hidden_cursor);
+    }
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_lock_mouse(bool lock) {
+    if (lock == _sapp.mouse.locked) {
+        return;
+    }
+    _sapp.mouse.dx = 0.0f;
+    _sapp.mouse.dy = 0.0f;
+    _sapp.mouse.locked = lock;
+    if (_sapp.mouse.locked) {
+        if (_sapp.x11.xi.available) {
+            XIEventMask em;
+            unsigned char mask[XIMaskLen(XI_RawMotion)] = { 0 }; // XIMaskLen is a macro
+            em.deviceid = XIAllMasterDevices;
+            em.mask_len = sizeof(mask);
+            em.mask = mask;
+            XISetMask(mask, XI_RawMotion);
+            XISelectEvents(_sapp.x11.display, _sapp.x11.root, &em, 1);
+        }
+        XGrabPointer(_sapp.x11.display, // display
+            _sapp.x11.window,           // grab_window
+            True,                       // owner_events
+            ButtonPressMask | ButtonReleaseMask | PointerMotionMask,    // event_mask
+            GrabModeAsync,              // pointer_mode
+            GrabModeAsync,              // keyboard_mode
+            _sapp.x11.window,           // confine_to
+            _sapp.x11.hidden_cursor,    // cursor
+            CurrentTime);               // time
+    }
+    else {
+        if (_sapp.x11.xi.available) {
+            XIEventMask em;
+            unsigned char mask[] = { 0 };
+            em.deviceid = XIAllMasterDevices;
+            em.mask_len = sizeof(mask);
+            em.mask = mask;
+            XISelectEvents(_sapp.x11.display, _sapp.x11.root, &em, 1);
+        }
+        XWarpPointer(_sapp.x11.display, None, _sapp.x11.window, 0, 0, 0, 0, (int) _sapp.mouse.x, _sapp.mouse.y);
+        XUngrabPointer(_sapp.x11.display, CurrentTime);
+    }
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_update_window_title(void) {
+    Xutf8SetWMProperties(_sapp.x11.display,
+        _sapp.x11.window,
+        _sapp.window_title, _sapp.window_title,
+        NULL, 0, NULL, NULL, NULL);
+    XChangeProperty(_sapp.x11.display, _sapp.x11.window,
+        _sapp.x11.NET_WM_NAME, _sapp.x11.UTF8_STRING, 8,
+        PropModeReplace,
+        (unsigned char*)_sapp.window_title,
+        strlen(_sapp.window_title));
+    XChangeProperty(_sapp.x11.display, _sapp.x11.window,
+        _sapp.x11.NET_WM_ICON_NAME, _sapp.x11.UTF8_STRING, 8,
+        PropModeReplace,
+        (unsigned char*)_sapp.window_title,
+        strlen(_sapp.window_title));
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_set_icon(const sapp_icon_desc* icon_desc, int num_images) {
+    SOKOL_ASSERT((num_images > 0) && (num_images <= SAPP_MAX_ICONIMAGES));
+    int long_count = 0;
+    for (int i = 0; i < num_images; i++) {
+        const sapp_image_desc* img_desc = &icon_desc->images[i];
+        long_count += 2 + (img_desc->width * img_desc->height);
+    }
+    long* icon_data = (long*) _sapp_malloc_clear((size_t)long_count * sizeof(long));
+    SOKOL_ASSERT(icon_data);
+    long* dst = icon_data;
+    for (int img_index = 0; img_index < num_images; img_index++) {
+        const sapp_image_desc* img_desc = &icon_desc->images[img_index];
+        const uint8_t* src = (const uint8_t*) img_desc->pixels.ptr;
+        *dst++ = img_desc->width;
+        *dst++ = img_desc->height;
+        const int num_pixels = img_desc->width * img_desc->height;
+        for (int pixel_index = 0; pixel_index < num_pixels; pixel_index++) {
+            *dst++ = ((long)(src[pixel_index * 4 + 0]) << 16) |
+                     ((long)(src[pixel_index * 4 + 1]) << 8) |
+                     ((long)(src[pixel_index * 4 + 2]) << 0) |
+                     ((long)(src[pixel_index * 4 + 3]) << 24);
+        }
+    }
+    XChangeProperty(_sapp.x11.display, _sapp.x11.window,
+        _sapp.x11.NET_WM_ICON,
+        XA_CARDINAL, 32,
+        PropModeReplace,
+        (unsigned char*)icon_data,
+        long_count);
+    _sapp_free(icon_data);
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE void _sapp_x11_create_window(Visual* visual, int depth) {
+    _sapp.x11.colormap = XCreateColormap(_sapp.x11.display, _sapp.x11.root, visual, AllocNone);
+    XSetWindowAttributes wa;
+    _sapp_clear(&wa, sizeof(wa));
+    const uint32_t wamask = CWBorderPixel | CWColormap | CWEventMask;
+    wa.colormap = _sapp.x11.colormap;
+    wa.border_pixel = 0;
+    wa.event_mask = StructureNotifyMask | KeyPressMask | KeyReleaseMask |
+                    PointerMotionMask | ButtonPressMask | ButtonReleaseMask |
+                    ExposureMask | FocusChangeMask | VisibilityChangeMask |
+                    EnterWindowMask | LeaveWindowMask | PropertyChangeMask;
+
+    int display_width = DisplayWidth(_sapp.x11.display, _sapp.x11.screen);
+    int display_height = DisplayHeight(_sapp.x11.display, _sapp.x11.screen);
+    int window_width = _sapp.window_width;
+    int window_height = _sapp.window_height;
+    if (0 == window_width) {
+        window_width = (display_width * 4) / 5;
+    }
+    if (0 == window_height) {
+        window_height = (display_height * 4) / 5;
+    }
+    int window_xpos = (display_width - window_width) / 2;
+    int window_ypos = (display_height - window_height) / 2;
+    if (window_xpos < 0) {
+        window_xpos = 0;
+    }
+    if (window_ypos < 0) {
+        window_ypos = 0;
+    }
+    _sapp_x11_grab_error_handler();
+    _sapp.x11.window = XCreateWindow(_sapp.x11.display,
+                                     _sapp.x11.root,
+                                     window_xpos,
+                                     window_ypos,
+                                     (uint32_t)window_width,
+                                     (uint32_t)window_height,
+                                     0,     /* border width */
+                                     depth, /* color depth */
+                                     InputOutput,
+                                     visual,
+                                     wamask,
+                                     &wa);
+    _sapp_x11_release_error_handler();
+    if (!_sapp.x11.window) {
+        _SAPP_PANIC(LINUX_X11_CREATE_WINDOW_FAILED);
+    }
+    Atom protocols[] = {
+        _sapp.x11.WM_DELETE_WINDOW
+    };
+    XSetWMProtocols(_sapp.x11.display, _sapp.x11.window, protocols, 1);
+
+    XSizeHints* hints = XAllocSizeHints();
+    hints->flags = (PWinGravity | PPosition | PSize);
+    hints->win_gravity = StaticGravity;
+    hints->x = window_xpos;
+    hints->y = window_ypos;
+    hints->width = window_width;
+    hints->height = window_height;
+    XSetWMNormalHints(_sapp.x11.display, _sapp.x11.window, hints);
+    XFree(hints);
+
+    /* announce support for drag'n'drop */
+    if (_sapp.drop.enabled) {
+        const Atom version = _SAPP_X11_XDND_VERSION;
+        XChangeProperty(_sapp.x11.display, _sapp.x11.window, _sapp.x11.xdnd.XdndAware, XA_ATOM, 32, PropModeReplace, (unsigned char*) &version, 1);
+    }
+    _sapp_x11_update_window_title();
+    _sapp_x11_query_window_size();
+}
+
+_SOKOL_PRIVATE void _sapp_x11_destroy_window(void) {
+    if (_sapp.x11.window) {
+        XUnmapWindow(_sapp.x11.display, _sapp.x11.window);
+        XDestroyWindow(_sapp.x11.display, _sapp.x11.window);
+        _sapp.x11.window = 0;
+    }
+    if (_sapp.x11.colormap) {
+        XFreeColormap(_sapp.x11.display, _sapp.x11.colormap);
+        _sapp.x11.colormap = 0;
+    }
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE bool _sapp_x11_window_visible(void) {
+    XWindowAttributes wa;
+    XGetWindowAttributes(_sapp.x11.display, _sapp.x11.window, &wa);
+    return wa.map_state == IsViewable;
+}
+
+_SOKOL_PRIVATE void _sapp_x11_show_window(void) {
+    if (!_sapp_x11_window_visible()) {
+        XMapWindow(_sapp.x11.display, _sapp.x11.window);
+        XRaiseWindow(_sapp.x11.display, _sapp.x11.window);
+        XFlush(_sapp.x11.display);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_hide_window(void) {
+    XUnmapWindow(_sapp.x11.display, _sapp.x11.window);
+    XFlush(_sapp.x11.display);
+}
+
+_SOKOL_PRIVATE unsigned long _sapp_x11_get_window_property(Window window, Atom property, Atom type, unsigned char** value) {
+    Atom actualType;
+    int actualFormat;
+    unsigned long itemCount, bytesAfter;
+    XGetWindowProperty(_sapp.x11.display,
+                       window,
+                       property,
+                       0,
+                       LONG_MAX,
+                       False,
+                       type,
+                       &actualType,
+                       &actualFormat,
+                       &itemCount,
+                       &bytesAfter,
+                       value);
+    return itemCount;
+}
+
+_SOKOL_PRIVATE int _sapp_x11_get_window_state(void) {
+    int result = WithdrawnState;
+    struct {
+        CARD32 state;
+        Window icon;
+    } *state = NULL;
+
+    if (_sapp_x11_get_window_property(_sapp.x11.window, _sapp.x11.WM_STATE, _sapp.x11.WM_STATE, (unsigned char**)&state) >= 2) {
+        result = (int)state->state;
+    }
+    if (state) {
+        XFree(state);
+    }
+    return result;
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_x11_key_modifier_bit(sapp_keycode key) {
+    switch (key) {
+        case SAPP_KEYCODE_LEFT_SHIFT:
+        case SAPP_KEYCODE_RIGHT_SHIFT:
+            return SAPP_MODIFIER_SHIFT;
+        case SAPP_KEYCODE_LEFT_CONTROL:
+        case SAPP_KEYCODE_RIGHT_CONTROL:
+            return SAPP_MODIFIER_CTRL;
+        case SAPP_KEYCODE_LEFT_ALT:
+        case SAPP_KEYCODE_RIGHT_ALT:
+            return SAPP_MODIFIER_ALT;
+        case SAPP_KEYCODE_LEFT_SUPER:
+        case SAPP_KEYCODE_RIGHT_SUPER:
+            return SAPP_MODIFIER_SUPER;
+        default:
+            return 0;
+    }
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_x11_button_modifier_bit(sapp_mousebutton btn) {
+    switch (btn) {
+        case SAPP_MOUSEBUTTON_LEFT:     return SAPP_MODIFIER_LMB;
+        case SAPP_MOUSEBUTTON_RIGHT:    return SAPP_MODIFIER_RMB;
+        case SAPP_MOUSEBUTTON_MIDDLE:   return SAPP_MODIFIER_MMB;
+        default: return 0;
+    }
+}
+
+_SOKOL_PRIVATE uint32_t _sapp_x11_mods(uint32_t x11_mods) {
+    uint32_t mods = 0;
+    if (x11_mods & ShiftMask) {
+        mods |= SAPP_MODIFIER_SHIFT;
+    }
+    if (x11_mods & ControlMask) {
+        mods |= SAPP_MODIFIER_CTRL;
+    }
+    if (x11_mods & Mod1Mask) {
+        mods |= SAPP_MODIFIER_ALT;
+    }
+    if (x11_mods & Mod4Mask) {
+        mods |= SAPP_MODIFIER_SUPER;
+    }
+    if (x11_mods & Button1Mask) {
+        mods |= SAPP_MODIFIER_LMB;
+    }
+    if (x11_mods & Button2Mask) {
+        mods |= SAPP_MODIFIER_MMB;
+    }
+    if (x11_mods & Button3Mask) {
+        mods |= SAPP_MODIFIER_RMB;
+    }
+    return mods;
+}
+
+_SOKOL_PRIVATE void _sapp_x11_app_event(sapp_event_type type) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE sapp_mousebutton _sapp_x11_translate_button(const XEvent* event) {
+    switch (event->xbutton.button) {
+        case Button1: return SAPP_MOUSEBUTTON_LEFT;
+        case Button2: return SAPP_MOUSEBUTTON_MIDDLE;
+        case Button3: return SAPP_MOUSEBUTTON_RIGHT;
+        default:      return SAPP_MOUSEBUTTON_INVALID;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_mouse_update(int x, int y, bool clear_dxdy) {
+    if (!_sapp.mouse.locked) {
+        const float new_x = (float) x;
+        const float new_y = (float) y;
+        if (clear_dxdy) {
+            _sapp.mouse.dx = 0.0f;
+            _sapp.mouse.dy = 0.0f;
+        } else if (_sapp.mouse.pos_valid) {
+            _sapp.mouse.dx = new_x - _sapp.mouse.x;
+            _sapp.mouse.dy = new_y - _sapp.mouse.y;
+        }
+        _sapp.mouse.x = new_x;
+        _sapp.mouse.y = new_y;
+        _sapp.mouse.pos_valid = true;
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_mouse_event(sapp_event_type type, sapp_mousebutton btn, uint32_t mods) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp.event.mouse_button = btn;
+        _sapp.event.modifiers = mods;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_scroll_event(float x, float y, uint32_t mods) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_MOUSE_SCROLL);
+        _sapp.event.modifiers = mods;
+        _sapp.event.scroll_x = x;
+        _sapp.event.scroll_y = y;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_key_event(sapp_event_type type, sapp_keycode key, bool repeat, uint32_t mods) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(type);
+        _sapp.event.key_code = key;
+        _sapp.event.key_repeat = repeat;
+        _sapp.event.modifiers = mods;
+        _sapp_call_event(&_sapp.event);
+        /* check if a CLIPBOARD_PASTED event must be sent too */
+        if (_sapp.clipboard.enabled &&
+            (type == SAPP_EVENTTYPE_KEY_DOWN) &&
+            (_sapp.event.modifiers == SAPP_MODIFIER_CTRL) &&
+            (_sapp.event.key_code == SAPP_KEYCODE_V))
+        {
+            _sapp_init_event(SAPP_EVENTTYPE_CLIPBOARD_PASTED);
+            _sapp_call_event(&_sapp.event);
+        }
+    }
+}
+
+_SOKOL_PRIVATE void _sapp_x11_char_event(uint32_t chr, bool repeat, uint32_t mods) {
+    if (_sapp_events_enabled()) {
+        _sapp_init_event(SAPP_EVENTTYPE_CHAR);
+        _sapp.event.char_code = chr;
+        _sapp.event.key_repeat = repeat;
+        _sapp.event.modifiers = mods;
+        _sapp_call_event(&_sapp.event);
+    }
+}
+
+_SOKOL_PRIVATE sapp_keycode _sapp_x11_translate_key(int scancode) {
+    int dummy;
+    KeySym* keysyms = XGetKeyboardMapping(_sapp.x11.display, scancode, 1, &dummy);
+    SOKOL_ASSERT(keysyms);
+    KeySym keysym = keysyms[0];
+    XFree(keysyms);
+    switch (keysym) {
+        case XK_Escape:         return SAPP_KEYCODE_ESCAPE;
+        case XK_Tab:            return SAPP_KEYCODE_TAB;
+        case XK_Shift_L:        return SAPP_KEYCODE_LEFT_SHIFT;
+        case XK_Shift_R:        return SAPP_KEYCODE_RIGHT_SHIFT;
+        case XK_Control_L:      return SAPP_KEYCODE_LEFT_CONTROL;
+        case XK_Control_R:      return SAPP_KEYCODE_RIGHT_CONTROL;
+        case XK_Meta_L:
+        case XK_Alt_L:          return SAPP_KEYCODE_LEFT_ALT;
+        case XK_Mode_switch:    /* Mapped to Alt_R on many keyboards */
+        case XK_ISO_Level3_Shift: /* AltGr on at least some machines */
+        case XK_Meta_R:
+        case XK_Alt_R:          return SAPP_KEYCODE_RIGHT_ALT;
+        case XK_Super_L:        return SAPP_KEYCODE_LEFT_SUPER;
+        case XK_Super_R:        return SAPP_KEYCODE_RIGHT_SUPER;
+        case XK_Menu:           return SAPP_KEYCODE_MENU;
+        case XK_Num_Lock:       return SAPP_KEYCODE_NUM_LOCK;
+        case XK_Caps_Lock:      return SAPP_KEYCODE_CAPS_LOCK;
+        case XK_Print:          return SAPP_KEYCODE_PRINT_SCREEN;
+        case XK_Scroll_Lock:    return SAPP_KEYCODE_SCROLL_LOCK;
+        case XK_Pause:          return SAPP_KEYCODE_PAUSE;
+        case XK_Delete:         return SAPP_KEYCODE_DELETE;
+        case XK_BackSpace:      return SAPP_KEYCODE_BACKSPACE;
+        case XK_Return:         return SAPP_KEYCODE_ENTER;
+        case XK_Home:           return SAPP_KEYCODE_HOME;
+        case XK_End:            return SAPP_KEYCODE_END;
+        case XK_Page_Up:        return SAPP_KEYCODE_PAGE_UP;
+        case XK_Page_Down:      return SAPP_KEYCODE_PAGE_DOWN;
+        case XK_Insert:         return SAPP_KEYCODE_INSERT;
+        case XK_Left:           return SAPP_KEYCODE_LEFT;
+        case XK_Right:          return SAPP_KEYCODE_RIGHT;
+        case XK_Down:           return SAPP_KEYCODE_DOWN;
+        case XK_Up:             return SAPP_KEYCODE_UP;
+        case XK_F1:             return SAPP_KEYCODE_F1;
+        case XK_F2:             return SAPP_KEYCODE_F2;
+        case XK_F3:             return SAPP_KEYCODE_F3;
+        case XK_F4:             return SAPP_KEYCODE_F4;
+        case XK_F5:             return SAPP_KEYCODE_F5;
+        case XK_F6:             return SAPP_KEYCODE_F6;
+        case XK_F7:             return SAPP_KEYCODE_F7;
+        case XK_F8:             return SAPP_KEYCODE_F8;
+        case XK_F9:             return SAPP_KEYCODE_F9;
+        case XK_F10:            return SAPP_KEYCODE_F10;
+        case XK_F11:            return SAPP_KEYCODE_F11;
+        case XK_F12:            return SAPP_KEYCODE_F12;
+        case XK_F13:            return SAPP_KEYCODE_F13;
+        case XK_F14:            return SAPP_KEYCODE_F14;
+        case XK_F15:            return SAPP_KEYCODE_F15;
+        case XK_F16:            return SAPP_KEYCODE_F16;
+        case XK_F17:            return SAPP_KEYCODE_F17;
+        case XK_F18:            return SAPP_KEYCODE_F18;
+        case XK_F19:            return SAPP_KEYCODE_F19;
+        case XK_F20:            return SAPP_KEYCODE_F20;
+        case XK_F21:            return SAPP_KEYCODE_F21;
+        case XK_F22:            return SAPP_KEYCODE_F22;
+        case XK_F23:            return SAPP_KEYCODE_F23;
+        case XK_F24:            return SAPP_KEYCODE_F24;
+        case XK_F25:            return SAPP_KEYCODE_F25;
+
+        case XK_KP_Divide:      return SAPP_KEYCODE_KP_DIVIDE;
+        case XK_KP_Multiply:    return SAPP_KEYCODE_KP_MULTIPLY;
+        case XK_KP_Subtract:    return SAPP_KEYCODE_KP_SUBTRACT;
+        case XK_KP_Add:         return SAPP_KEYCODE_KP_ADD;
+
+        case XK_KP_Insert:      return SAPP_KEYCODE_KP_0;
+        case XK_KP_End:         return SAPP_KEYCODE_KP_1;
+        case XK_KP_Down:        return SAPP_KEYCODE_KP_2;
+        case XK_KP_Page_Down:   return SAPP_KEYCODE_KP_3;
+        case XK_KP_Left:        return SAPP_KEYCODE_KP_4;
+        case XK_KP_Begin:       return SAPP_KEYCODE_KP_5;
+        case XK_KP_Right:       return SAPP_KEYCODE_KP_6;
+        case XK_KP_Home:        return SAPP_KEYCODE_KP_7;
+        case XK_KP_Up:          return SAPP_KEYCODE_KP_8;
+        case XK_KP_Page_Up:     return SAPP_KEYCODE_KP_9;
+        case XK_KP_Delete:      return SAPP_KEYCODE_KP_DECIMAL;
+        case XK_KP_Equal:       return SAPP_KEYCODE_KP_EQUAL;
+        case XK_KP_Enter:       return SAPP_KEYCODE_KP_ENTER;
+
+        case XK_a:              return SAPP_KEYCODE_A;
+        case XK_b:              return SAPP_KEYCODE_B;
+        case XK_c:              return SAPP_KEYCODE_C;
+        case XK_d:              return SAPP_KEYCODE_D;
+        case XK_e:              return SAPP_KEYCODE_E;
+        case XK_f:              return SAPP_KEYCODE_F;
+        case XK_g:              return SAPP_KEYCODE_G;
+        case XK_h:              return SAPP_KEYCODE_H;
+        case XK_i:              return SAPP_KEYCODE_I;
+        case XK_j:              return SAPP_KEYCODE_J;
+        case XK_k:              return SAPP_KEYCODE_K;
+        case XK_l:              return SAPP_KEYCODE_L;
+        case XK_m:              return SAPP_KEYCODE_M;
+        case XK_n:              return SAPP_KEYCODE_N;
+        case XK_o:              return SAPP_KEYCODE_O;
+        case XK_p:              return SAPP_KEYCODE_P;
+        case XK_q:              return SAPP_KEYCODE_Q;
+        case XK_r:              return SAPP_KEYCODE_R;
+        case XK_s:              return SAPP_KEYCODE_S;
+        case XK_t:              return SAPP_KEYCODE_T;
+        case XK_u:              return SAPP_KEYCODE_U;
+        case XK_v:              return SAPP_KEYCODE_V;
+        case XK_w:              return SAPP_KEYCODE_W;
+        case XK_x:              return SAPP_KEYCODE_X;
+        case XK_y:              return SAPP_KEYCODE_Y;
+        case XK_z:              return SAPP_KEYCODE_Z;
+        case XK_1:              return SAPP_KEYCODE_1;
+        case XK_2:              return SAPP_KEYCODE_2;
+        case XK_3:              return SAPP_KEYCODE_3;
+        case XK_4:              return SAPP_KEYCODE_4;
+        case XK_5:              return SAPP_KEYCODE_5;
+        case XK_6:              return SAPP_KEYCODE_6;
+        case XK_7:              return SAPP_KEYCODE_7;
+        case XK_8:              return SAPP_KEYCODE_8;
+        case XK_9:              return SAPP_KEYCODE_9;
+        case XK_0:              return SAPP_KEYCODE_0;
+        case XK_space:          return SAPP_KEYCODE_SPACE;
+        case XK_minus:          return SAPP_KEYCODE_MINUS;
+        case XK_equal:          return SAPP_KEYCODE_EQUAL;
+        case XK_bracketleft:    return SAPP_KEYCODE_LEFT_BRACKET;
+        case XK_bracketright:   return SAPP_KEYCODE_RIGHT_BRACKET;
+        case XK_backslash:      return SAPP_KEYCODE_BACKSLASH;
+        case XK_semicolon:      return SAPP_KEYCODE_SEMICOLON;
+        case XK_apostrophe:     return SAPP_KEYCODE_APOSTROPHE;
+        case XK_grave:          return SAPP_KEYCODE_GRAVE_ACCENT;
+        case XK_comma:          return SAPP_KEYCODE_COMMA;
+        case XK_period:         return SAPP_KEYCODE_PERIOD;
+        case XK_slash:          return SAPP_KEYCODE_SLASH;
+        case XK_less:           return SAPP_KEYCODE_WORLD_1; /* At least in some layouts... */
+        default:                return SAPP_KEYCODE_INVALID;
+    }
+}
+
+_SOKOL_PRIVATE int32_t _sapp_x11_keysym_to_unicode(KeySym keysym) {
+    int min = 0;
+    int max = sizeof(_sapp_x11_keysymtab) / sizeof(struct _sapp_x11_codepair) - 1;
+    int mid;
+
+    /* First check for Latin-1 characters (1:1 mapping) */
+    if ((keysym >= 0x0020 && keysym <= 0x007e) ||
+        (keysym >= 0x00a0 && keysym <= 0x00ff))
+    {
+        return keysym;
+    }
+
+    /* Also check for directly encoded 24-bit UCS characters */
+    if ((keysym & 0xff000000) == 0x01000000) {
+        return keysym & 0x00ffffff;
+    }
+
+    /* Binary search in table */
+    while (max >= min) {
+        mid = (min + max) / 2;
+        if (_sapp_x11_keysymtab[mid].keysym < keysym) {
+            min = mid + 1;
+        }
+        else if (_sapp_x11_keysymtab[mid].keysym > keysym) {
+            max = mid - 1;
+        }
+        else {
+            return _sapp_x11_keysymtab[mid].ucs;
+        }
+    }
+
+    /* No matching Unicode value found */
+    return -1;
+}
+
+_SOKOL_PRIVATE bool _sapp_x11_parse_dropped_files_list(const char* src) {
+    SOKOL_ASSERT(src);
+    SOKOL_ASSERT(_sapp.drop.buffer);
+
+    _sapp_clear_drop_buffer();
+    _sapp.drop.num_files = 0;
+
+    /*
+        src is (potentially percent-encoded) string made of one or multiple paths
+        separated by \r\n, each path starting with 'file://'
+    */
+    bool err = false;
+    int src_count = 0;
+    char src_chr = 0;
+    char* dst_ptr = _sapp.drop.buffer;
+    const char* dst_end_ptr = dst_ptr + (_sapp.drop.max_path_length - 1); // room for terminating 0
+    while (0 != (src_chr = *src++)) {
+        src_count++;
+        char dst_chr = 0;
+        /* check leading 'file://' */
+        if (src_count <= 7) {
+            if (((src_count == 1) && (src_chr != 'f')) ||
+                ((src_count == 2) && (src_chr != 'i')) ||
+                ((src_count == 3) && (src_chr != 'l')) ||
+                ((src_count == 4) && (src_chr != 'e')) ||
+                ((src_count == 5) && (src_chr != ':')) ||
+                ((src_count == 6) && (src_chr != '/')) ||
+                ((src_count == 7) && (src_chr != '/')))
+            {
+                _SAPP_ERROR(LINUX_X11_DROPPED_FILE_URI_WRONG_SCHEME);
+                err = true;
+                break;
+            }
+        }
+        else if (src_chr == '\r') {
+            // skip
+        }
+        else if (src_chr == '\n') {
+            src_count = 0;
+            _sapp.drop.num_files++;
+            // too many files is not an error
+            if (_sapp.drop.num_files >= _sapp.drop.max_files) {
+                break;
+            }
+            dst_ptr = _sapp.drop.buffer + _sapp.drop.num_files * _sapp.drop.max_path_length;
+            dst_end_ptr = dst_ptr + (_sapp.drop.max_path_length - 1);
+        }
+        else if ((src_chr == '%') && src[0] && src[1]) {
+            // a percent-encoded byte (most likely UTF-8 multibyte sequence)
+            const char digits[3] = { src[0], src[1], 0 };
+            src += 2;
+            dst_chr = (char) strtol(digits, 0, 16);
+        }
+        else {
+            dst_chr = src_chr;
+        }
+        if (dst_chr) {
+            // dst_end_ptr already has adjustment for terminating zero
+            if (dst_ptr < dst_end_ptr) {
+                *dst_ptr++ = dst_chr;
+            }
+            else {
+                _SAPP_ERROR(DROPPED_FILE_PATH_TOO_LONG);
+                err = true;
+                break;
+            }
+        }
+    }
+    if (err) {
+        _sapp_clear_drop_buffer();
+        _sapp.drop.num_files = 0;
+        return false;
+    }
+    else {
+        return true;
+    }
+}
+
+// XLib manual says keycodes are in the range [8, 255] inclusive.
+// https://tronche.com/gui/x/xlib/input/keyboard-encoding.html
+static bool _sapp_x11_keycodes[256];
+
+_SOKOL_PRIVATE void _sapp_x11_process_event(XEvent* event) {
+    Bool filtered = XFilterEvent(event, None);
+    switch (event->type) {
+        case GenericEvent:
+            if (_sapp.mouse.locked && _sapp.x11.xi.available) {
+                if (event->xcookie.extension == _sapp.x11.xi.major_opcode) {
+                    if (XGetEventData(_sapp.x11.display, &event->xcookie)) {
+                        if (event->xcookie.evtype == XI_RawMotion) {
+                            XIRawEvent* re = (XIRawEvent*) event->xcookie.data;
+                            if (re->valuators.mask_len) {
+                                const double* values = re->raw_values;
+                                if (XIMaskIsSet(re->valuators.mask, 0)) {
+                                    _sapp.mouse.dx = (float) *values;
+                                    values++;
+                                }
+                                if (XIMaskIsSet(re->valuators.mask, 1)) {
+                                    _sapp.mouse.dy = (float) *values;
+                                }
+                                _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID, _sapp_x11_mods(event->xmotion.state));
+                            }
+                        }
+                        XFreeEventData(_sapp.x11.display, &event->xcookie);
+                    }
+                }
+            }
+            break;
+        case FocusIn:
+            // NOTE: ignoring NotifyGrab and NotifyUngrab is same behaviour as GLFW
+            if ((event->xfocus.mode != NotifyGrab) && (event->xfocus.mode != NotifyUngrab)) {
+                _sapp_x11_app_event(SAPP_EVENTTYPE_FOCUSED);
+            }
+            break;
+        case FocusOut:
+            /* if focus is lost for any reason, and we're in mouse locked mode, disable mouse lock */
+            if (_sapp.mouse.locked) {
+                _sapp_x11_lock_mouse(false);
+            }
+            // NOTE: ignoring NotifyGrab and NotifyUngrab is same behaviour as GLFW
+            if ((event->xfocus.mode != NotifyGrab) && (event->xfocus.mode != NotifyUngrab)) {
+                _sapp_x11_app_event(SAPP_EVENTTYPE_UNFOCUSED);
+            }
+            break;
+        case KeyPress:
+            {
+                int keycode = (int)event->xkey.keycode;
+                const sapp_keycode key = _sapp_x11_translate_key(keycode);
+                bool repeat = _sapp_x11_keycodes[keycode & 0xFF];
+                _sapp_x11_keycodes[keycode & 0xFF] = true;
+                uint32_t mods = _sapp_x11_mods(event->xkey.state);
+                // X11 doesn't set modifier bit on key down, so emulate that
+                mods |= _sapp_x11_key_modifier_bit(key);
+                if (key != SAPP_KEYCODE_INVALID) {
+                    _sapp_x11_key_event(SAPP_EVENTTYPE_KEY_DOWN, key, repeat, mods);
+                }
+                KeySym keysym;
+                XLookupString(&event->xkey, NULL, 0, &keysym, NULL);
+                int32_t chr = _sapp_x11_keysym_to_unicode(keysym);
+                if (chr > 0) {
+                    _sapp_x11_char_event((uint32_t)chr, repeat, mods);
+                }
+            }
+            break;
+        case KeyRelease:
+            {
+                int keycode = (int)event->xkey.keycode;
+                const sapp_keycode key = _sapp_x11_translate_key(keycode);
+                _sapp_x11_keycodes[keycode & 0xFF] = false;
+                if (key != SAPP_KEYCODE_INVALID) {
+                    uint32_t mods = _sapp_x11_mods(event->xkey.state);
+                    // X11 doesn't clear modifier bit on key up, so emulate that
+                    mods &= ~_sapp_x11_key_modifier_bit(key);
+                    _sapp_x11_key_event(SAPP_EVENTTYPE_KEY_UP, key, false, mods);
+                }
+            }
+            break;
+        case ButtonPress:
+            {
+                _sapp_x11_mouse_update(event->xbutton.x, event->xbutton.y, false);
+                const sapp_mousebutton btn = _sapp_x11_translate_button(event);
+                uint32_t mods = _sapp_x11_mods(event->xbutton.state);
+                // X11 doesn't set modifier bit on button down, so emulate that
+                mods |= _sapp_x11_button_modifier_bit(btn);
+                if (btn != SAPP_MOUSEBUTTON_INVALID) {
+                    _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_DOWN, btn, mods);
+                    _sapp.x11.mouse_buttons |= (1 << btn);
+                }
+                else {
+                    /* might be a scroll event */
+                    switch (event->xbutton.button) {
+                        case 4: _sapp_x11_scroll_event(0.0f, 1.0f, mods); break;
+                        case 5: _sapp_x11_scroll_event(0.0f, -1.0f, mods); break;
+                        case 6: _sapp_x11_scroll_event(1.0f, 0.0f, mods); break;
+                        case 7: _sapp_x11_scroll_event(-1.0f, 0.0f, mods); break;
+                    }
+                }
+            }
+            break;
+        case ButtonRelease:
+            {
+                _sapp_x11_mouse_update(event->xbutton.x, event->xbutton.y, false);
+                const sapp_mousebutton btn = _sapp_x11_translate_button(event);
+                if (btn != SAPP_MOUSEBUTTON_INVALID) {
+                    uint32_t mods = _sapp_x11_mods(event->xbutton.state);
+                    // X11 doesn't clear modifier bit on button up, so emulate that
+                    mods &= ~_sapp_x11_button_modifier_bit(btn);
+                    _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_UP, btn, mods);
+                    _sapp.x11.mouse_buttons &= ~(1 << btn);
+                }
+            }
+            break;
+        case EnterNotify:
+            /* don't send enter/leave events while mouse button held down */
+            if (0 == _sapp.x11.mouse_buttons) {
+                _sapp_x11_mouse_update(event->xcrossing.x, event->xcrossing.y, true);
+                _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_ENTER, SAPP_MOUSEBUTTON_INVALID, _sapp_x11_mods(event->xcrossing.state));
+            }
+            break;
+        case LeaveNotify:
+            if (0 == _sapp.x11.mouse_buttons) {
+                _sapp_x11_mouse_update(event->xcrossing.x, event->xcrossing.y, true);
+                _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_LEAVE, SAPP_MOUSEBUTTON_INVALID, _sapp_x11_mods(event->xcrossing.state));
+            }
+            break;
+        case MotionNotify:
+            if (!_sapp.mouse.locked) {
+                _sapp_x11_mouse_update(event->xmotion.x, event->xmotion.y, false);
+                _sapp_x11_mouse_event(SAPP_EVENTTYPE_MOUSE_MOVE, SAPP_MOUSEBUTTON_INVALID, _sapp_x11_mods(event->xmotion.state));
+            }
+            break;
+        case ConfigureNotify:
+            if ((event->xconfigure.width != _sapp.window_width) || (event->xconfigure.height != _sapp.window_height)) {
+                _sapp.window_width = event->xconfigure.width;
+                _sapp.window_height = event->xconfigure.height;
+                _sapp.framebuffer_width = _sapp.window_width;
+                _sapp.framebuffer_height = _sapp.window_height;
+                _sapp_x11_app_event(SAPP_EVENTTYPE_RESIZED);
+            }
+            break;
+        case PropertyNotify:
+            if (event->xproperty.state == PropertyNewValue) {
+                if (event->xproperty.atom == _sapp.x11.WM_STATE) {
+                    const int state = _sapp_x11_get_window_state();
+                    if (state != _sapp.x11.window_state) {
+                        _sapp.x11.window_state = state;
+                        if (state == IconicState) {
+                            _sapp_x11_app_event(SAPP_EVENTTYPE_ICONIFIED);
+                        }
+                        else if (state == NormalState) {
+                            _sapp_x11_app_event(SAPP_EVENTTYPE_RESTORED);
+                        }
+                    }
+                }
+            }
+            break;
+        case ClientMessage:
+            if (filtered) {
+                return;
+            }
+            if (event->xclient.message_type == _sapp.x11.WM_PROTOCOLS) {
+                const Atom protocol = (Atom)event->xclient.data.l[0];
+                if (protocol == _sapp.x11.WM_DELETE_WINDOW) {
+                    _sapp.quit_requested = true;
+                }
+            }
+            else if (event->xclient.message_type == _sapp.x11.xdnd.XdndEnter) {
+                const bool is_list = 0 != (event->xclient.data.l[1] & 1);
+                _sapp.x11.xdnd.source  = (Window)event->xclient.data.l[0];
+                _sapp.x11.xdnd.version = event->xclient.data.l[1] >> 24;
+                _sapp.x11.xdnd.format  = None;
+                if (_sapp.x11.xdnd.version > _SAPP_X11_XDND_VERSION) {
+                    return;
+                }
+                uint32_t count = 0;
+                Atom* formats = 0;
+                if (is_list) {
+                    count = _sapp_x11_get_window_property(_sapp.x11.xdnd.source, _sapp.x11.xdnd.XdndTypeList, XA_ATOM, (unsigned char**)&formats);
+                }
+                else {
+                    count = 3;
+                    formats = (Atom*) event->xclient.data.l + 2;
+                }
+                for (uint32_t i = 0; i < count; i++) {
+                    if (formats[i] == _sapp.x11.xdnd.text_uri_list) {
+                        _sapp.x11.xdnd.format = _sapp.x11.xdnd.text_uri_list;
+                        break;
+                    }
+                }
+                if (is_list && formats) {
+                    XFree(formats);
+                }
+            }
+            else if (event->xclient.message_type == _sapp.x11.xdnd.XdndDrop) {
+                if (_sapp.x11.xdnd.version > _SAPP_X11_XDND_VERSION) {
+                    return;
+                }
+                Time time = CurrentTime;
+                if (_sapp.x11.xdnd.format) {
+                    if (_sapp.x11.xdnd.version >= 1) {
+                        time = (Time)event->xclient.data.l[2];
+                    }
+                    XConvertSelection(_sapp.x11.display,
+                                      _sapp.x11.xdnd.XdndSelection,
+                                      _sapp.x11.xdnd.format,
+                                      _sapp.x11.xdnd.XdndSelection,
+                                      _sapp.x11.window,
+                                      time);
+                }
+                else if (_sapp.x11.xdnd.version >= 2) {
+                    XEvent reply;
+                    _sapp_clear(&reply, sizeof(reply));
+                    reply.type = ClientMessage;
+                    reply.xclient.window = _sapp.x11.xdnd.source;
+                    reply.xclient.message_type = _sapp.x11.xdnd.XdndFinished;
+                    reply.xclient.format = 32;
+                    reply.xclient.data.l[0] = (long)_sapp.x11.window;
+                    reply.xclient.data.l[1] = 0;    // drag was rejected
+                    reply.xclient.data.l[2] = None;
+                    XSendEvent(_sapp.x11.display, _sapp.x11.xdnd.source, False, NoEventMask, &reply);
+                    XFlush(_sapp.x11.display);
+                }
+            }
+            else if (event->xclient.message_type == _sapp.x11.xdnd.XdndPosition) {
+                /* drag operation has moved over the window
+                   FIXME: we could track the mouse position here, but
+                   this isn't implemented on other platforms either so far
+                */
+                if (_sapp.x11.xdnd.version > _SAPP_X11_XDND_VERSION) {
+                    return;
+                }
+                XEvent reply;
+                _sapp_clear(&reply, sizeof(reply));
+                reply.type = ClientMessage;
+                reply.xclient.window = _sapp.x11.xdnd.source;
+                reply.xclient.message_type = _sapp.x11.xdnd.XdndStatus;
+                reply.xclient.format = 32;
+                reply.xclient.data.l[0] = (long)_sapp.x11.window;
+                if (_sapp.x11.xdnd.format) {
+                    /* reply that we are ready to copy the dragged data */
+                    reply.xclient.data.l[1] = 1;    // accept with no rectangle
+                    if (_sapp.x11.xdnd.version >= 2) {
+                        reply.xclient.data.l[4] = (long)_sapp.x11.xdnd.XdndActionCopy;
+                    }
+                }
+                XSendEvent(_sapp.x11.display, _sapp.x11.xdnd.source, False, NoEventMask, &reply);
+                XFlush(_sapp.x11.display);
+            }
+            break;
+        case SelectionNotify:
+            if (event->xselection.property == _sapp.x11.xdnd.XdndSelection) {
+                char* data = 0;
+                uint32_t result = _sapp_x11_get_window_property(event->xselection.requestor,
+                                                                event->xselection.property,
+                                                                event->xselection.target,
+                                                                (unsigned char**) &data);
+                if (_sapp.drop.enabled && result) {
+                    if (_sapp_x11_parse_dropped_files_list(data)) {
+                        _sapp.mouse.dx = 0.0f;
+                        _sapp.mouse.dy = 0.0f;
+                        if (_sapp_events_enabled()) {
+                            // FIXME: Figure out how to get modifier key state here.
+                            // The XSelection event has no 'state' item, and
+                            // XQueryKeymap() always returns a zeroed array.
+                            _sapp_init_event(SAPP_EVENTTYPE_FILES_DROPPED);
+                            _sapp_call_event(&_sapp.event);
+                        }
+                    }
+                }
+                if (_sapp.x11.xdnd.version >= 2) {
+                    XEvent reply;
+                    _sapp_clear(&reply, sizeof(reply));
+                    reply.type = ClientMessage;
+                    reply.xclient.window = _sapp.x11.xdnd.source;
+                    reply.xclient.message_type = _sapp.x11.xdnd.XdndFinished;
+                    reply.xclient.format = 32;
+                    reply.xclient.data.l[0] = (long)_sapp.x11.window;
+                    reply.xclient.data.l[1] = result;
+                    reply.xclient.data.l[2] = (long)_sapp.x11.xdnd.XdndActionCopy;
+                    XSendEvent(_sapp.x11.display, _sapp.x11.xdnd.source, False, NoEventMask, &reply);
+                    XFlush(_sapp.x11.display);
+                }
+            }
+            break;
+        case DestroyNotify:
+            break;
+    }
+}
+
+#if !defined(_SAPP_GLX)
+
+_SOKOL_PRIVATE void _sapp_egl_init(void) {
+#if defined(SOKOL_GLCORE33)
+    if (!eglBindAPI(EGL_OPENGL_API)) {
+        _SAPP_PANIC(LINUX_EGL_BIND_OPENGL_API_FAILED);
+    }
+#else
+    if (!eglBindAPI(EGL_OPENGL_ES_API)) {
+        _SAPP_PANIC(LINUX_EGL_BIND_OPENGL_ES_API_FAILED);
+    }
+#endif
+
+    _sapp.egl.display = eglGetDisplay((EGLNativeDisplayType)_sapp.x11.display);
+    if (EGL_NO_DISPLAY == _sapp.egl.display) {
+        _SAPP_PANIC(LINUX_EGL_GET_DISPLAY_FAILED);
+    }
+
+    EGLint major, minor;
+    if (!eglInitialize(_sapp.egl.display, &major, &minor)) {
+        _SAPP_PANIC(LINUX_EGL_INITIALIZE_FAILED);
+    }
+
+    EGLint sample_count = _sapp.desc.sample_count > 1 ? _sapp.desc.sample_count : 0;
+    EGLint alpha_size = _sapp.desc.alpha ? 8 : 0;
+    const EGLint config_attrs[] = {
+        EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
+        #if defined(SOKOL_GLCORE33)
+            EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
+        #elif defined(SOKOL_GLES3)
+            EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
+        #endif
+        EGL_RED_SIZE, 8,
+        EGL_GREEN_SIZE, 8,
+        EGL_BLUE_SIZE, 8,
+        EGL_ALPHA_SIZE, alpha_size,
+        EGL_DEPTH_SIZE, 24,
+        EGL_STENCIL_SIZE, 8,
+        EGL_SAMPLE_BUFFERS, _sapp.desc.sample_count > 1 ? 1 : 0,
+        EGL_SAMPLES, sample_count,
+        EGL_NONE,
+    };
+
+    EGLConfig egl_configs[32];
+    EGLint config_count;
+    if (!eglChooseConfig(_sapp.egl.display, config_attrs, egl_configs, 32, &config_count) || config_count == 0) {
+        _SAPP_PANIC(LINUX_EGL_NO_CONFIGS);
+    }
+
+    EGLConfig config = egl_configs[0];
+    for (int i = 0; i < config_count; ++i) {
+        EGLConfig c = egl_configs[i];
+        EGLint r, g, b, a, d, s, n;
+        if (eglGetConfigAttrib(_sapp.egl.display, c, EGL_RED_SIZE, &r) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_GREEN_SIZE, &g) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_BLUE_SIZE, &b) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_ALPHA_SIZE, &a) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_DEPTH_SIZE, &d) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_STENCIL_SIZE, &s) &&
+            eglGetConfigAttrib(_sapp.egl.display, c, EGL_SAMPLES, &n) &&
+            (r == 8) && (g == 8) && (b == 8) && (a == alpha_size) && (d == 24) && (s == 8) && (n == sample_count)) {
+            config = c;
+            break;
+        }
+    }
+
+    EGLint visual_id;
+    if (!eglGetConfigAttrib(_sapp.egl.display, config, EGL_NATIVE_VISUAL_ID, &visual_id)) {
+        _SAPP_PANIC(LINUX_EGL_NO_NATIVE_VISUAL);
+    }
+
+    XVisualInfo visual_info_template;
+    _sapp_clear(&visual_info_template, sizeof(visual_info_template));
+    visual_info_template.visualid = (VisualID)visual_id;
+
+    int num_visuals;
+    XVisualInfo* visual_info = XGetVisualInfo(_sapp.x11.display, VisualIDMask, &visual_info_template, &num_visuals);
+    if (!visual_info) {
+        _SAPP_PANIC(LINUX_EGL_GET_VISUAL_INFO_FAILED);
+    }
+
+    _sapp_x11_create_window(visual_info->visual, visual_info->depth);
+    XFree(visual_info);
+
+    _sapp.egl.surface = eglCreateWindowSurface(_sapp.egl.display, config, (EGLNativeWindowType)_sapp.x11.window, NULL);
+    if (EGL_NO_SURFACE == _sapp.egl.surface) {
+        _SAPP_PANIC(LINUX_EGL_CREATE_WINDOW_SURFACE_FAILED);
+    }
+
+    EGLint ctx_attrs[] = {
+        #if defined(SOKOL_GLCORE33)
+            EGL_CONTEXT_MAJOR_VERSION, _sapp.desc.gl_major_version,
+            EGL_CONTEXT_MINOR_VERSION, _sapp.desc.gl_minor_version,
+            EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
+        #elif defined(SOKOL_GLES3)
+            EGL_CONTEXT_CLIENT_VERSION, 3,
+        #endif
+        EGL_NONE,
+    };
+
+    _sapp.egl.context = eglCreateContext(_sapp.egl.display, config, EGL_NO_CONTEXT, ctx_attrs);
+    if (EGL_NO_CONTEXT == _sapp.egl.context) {
+        _SAPP_PANIC(LINUX_EGL_CREATE_CONTEXT_FAILED);
+    }
+
+    if (!eglMakeCurrent(_sapp.egl.display, _sapp.egl.surface, _sapp.egl.surface, _sapp.egl.context)) {
+        _SAPP_PANIC(LINUX_EGL_MAKE_CURRENT_FAILED);
+    }
+
+    eglSwapInterval(_sapp.egl.display, _sapp.swap_interval);
+}
+
+_SOKOL_PRIVATE void _sapp_egl_destroy(void) {
+    if (_sapp.egl.display != EGL_NO_DISPLAY) {
+        eglMakeCurrent(_sapp.egl.display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+
+        if (_sapp.egl.context != EGL_NO_CONTEXT) {
+            eglDestroyContext(_sapp.egl.display, _sapp.egl.context);
+            _sapp.egl.context = EGL_NO_CONTEXT;
+        }
+
+        if (_sapp.egl.surface != EGL_NO_SURFACE) {
+            eglDestroySurface(_sapp.egl.display, _sapp.egl.surface);
+            _sapp.egl.surface = EGL_NO_SURFACE;
+        }
+
+        eglTerminate(_sapp.egl.display);
+        _sapp.egl.display = EGL_NO_DISPLAY;
+    }
+}
+
+#endif /* _SAPP_GLX */
+
+_SOKOL_PRIVATE void _sapp_linux_run(const sapp_desc* desc) {
+    /* The following lines are here to trigger a linker error instead of an
+        obscure runtime error if the user has forgotten to add -pthread to
+        the compiler or linker options. They have no other purpose.
+    */
+    pthread_attr_t pthread_attr;
+    pthread_attr_init(&pthread_attr);
+    pthread_attr_destroy(&pthread_attr);
+
+    _sapp_init_state(desc);
+    _sapp.x11.window_state = NormalState;
+
+    XInitThreads();
+    XrmInitialize();
+    _sapp.x11.display = XOpenDisplay(NULL);
+    if (!_sapp.x11.display) {
+        _SAPP_PANIC(LINUX_X11_OPEN_DISPLAY_FAILED);
+    }
+    _sapp.x11.screen = DefaultScreen(_sapp.x11.display);
+    _sapp.x11.root = DefaultRootWindow(_sapp.x11.display);
+    XkbSetDetectableAutoRepeat(_sapp.x11.display, true, NULL);
+    _sapp_x11_query_system_dpi();
+    _sapp.dpi_scale = _sapp.x11.dpi / 96.0f;
+    _sapp_x11_init_extensions();
+    _sapp_x11_create_cursors();
+#if defined(_SAPP_GLX)
+    _sapp_glx_init();
+    Visual* visual = 0;
+    int depth = 0;
+    _sapp_glx_choose_visual(&visual, &depth);
+    _sapp_x11_create_window(visual, depth);
+    _sapp_glx_create_context();
+    _sapp_glx_swapinterval(_sapp.swap_interval);
+#else
+    _sapp_egl_init();
+#endif
+    sapp_set_icon(&desc->icon);
+    _sapp.valid = true;
+    _sapp_x11_show_window();
+    if (_sapp.fullscreen) {
+        _sapp_x11_set_fullscreen(true);
+    }
+
+    XFlush(_sapp.x11.display);
+    while (!_sapp.quit_ordered) {
+        _sapp_timing_measure(&_sapp.timing);
+        int count = XPending(_sapp.x11.display);
+        while (count--) {
+            XEvent event;
+            XNextEvent(_sapp.x11.display, &event);
+            _sapp_x11_process_event(&event);
+        }
+        _sapp_frame();
+#if defined(_SAPP_GLX)
+        _sapp_glx_swap_buffers();
+#else
+        eglSwapBuffers(_sapp.egl.display, _sapp.egl.surface);
+#endif
+        XFlush(_sapp.x11.display);
+        /* handle quit-requested, either from window or from sapp_request_quit() */
+        if (_sapp.quit_requested && !_sapp.quit_ordered) {
+            /* give user code a chance to intervene */
+            _sapp_x11_app_event(SAPP_EVENTTYPE_QUIT_REQUESTED);
+            /* if user code hasn't intervened, quit the app */
+            if (_sapp.quit_requested) {
+                _sapp.quit_ordered = true;
+            }
+        }
+    }
+    _sapp_call_cleanup();
+#if defined(_SAPP_GLX)
+    _sapp_glx_destroy_context();
+#else
+    _sapp_egl_destroy();
+#endif
+    _sapp_x11_destroy_window();
+    _sapp_x11_destroy_cursors();
+    XCloseDisplay(_sapp.x11.display);
+    _sapp_discard_state();
+}
+
+#if !defined(SOKOL_NO_ENTRY)
+int main(int argc, char* argv[]) {
+    sapp_desc desc = sokol_main(argc, argv);
+    _sapp_linux_run(&desc);
+    return 0;
+}
+#endif /* SOKOL_NO_ENTRY */
+#endif /* _SAPP_LINUX */
+
+// ██████  ██    ██ ██████  ██      ██  ██████
+// ██   ██ ██    ██ ██   ██ ██      ██ ██
+// ██████  ██    ██ ██████  ██      ██ ██
+// ██      ██    ██ ██   ██ ██      ██ ██
+// ██       ██████  ██████  ███████ ██  ██████
+//
+// >>public
+#if defined(SOKOL_NO_ENTRY)
+SOKOL_API_IMPL void sapp_run(const sapp_desc* desc) {
+    SOKOL_ASSERT(desc);
+    #if defined(_SAPP_MACOS)
+        _sapp_macos_run(desc);
+    #elif defined(_SAPP_IOS)
+        _sapp_ios_run(desc);
+    #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_run(desc);
+    #elif defined(_SAPP_WIN32)
+        _sapp_win32_run(desc);
+    #elif defined(_SAPP_LINUX)
+        _sapp_linux_run(desc);
+    #else
+    #error "sapp_run() not supported on this platform"
+    #endif
+}
+
+/* this is just a stub so the linker doesn't complain */
+sapp_desc sokol_main(int argc, char* argv[]) {
+    _SOKOL_UNUSED(argc);
+    _SOKOL_UNUSED(argv);
+    sapp_desc desc;
+    _sapp_clear(&desc, sizeof(desc));
+    return desc;
+}
+#else
+/* likewise, in normal mode, sapp_run() is just an empty stub */
+SOKOL_API_IMPL void sapp_run(const sapp_desc* desc) {
+    _SOKOL_UNUSED(desc);
+}
+#endif
+
+SOKOL_API_IMPL bool sapp_isvalid(void) {
+    return _sapp.valid;
+}
+
+SOKOL_API_IMPL void* sapp_userdata(void) {
+    return _sapp.desc.user_data;
+}
+
+SOKOL_API_IMPL sapp_desc sapp_query_desc(void) {
+    return _sapp.desc;
+}
+
+SOKOL_API_IMPL uint64_t sapp_frame_count(void) {
+    return _sapp.frame_count;
+}
+
+SOKOL_API_IMPL double sapp_frame_duration(void) {
+    return _sapp_timing_get_avg(&_sapp.timing);
+}
+
+SOKOL_API_IMPL int sapp_width(void) {
+    return (_sapp.framebuffer_width > 0) ? _sapp.framebuffer_width : 1;
+}
+
+SOKOL_API_IMPL float sapp_widthf(void) {
+    return (float)sapp_width();
+}
+
+SOKOL_API_IMPL int sapp_height(void) {
+    return (_sapp.framebuffer_height > 0) ? _sapp.framebuffer_height : 1;
+}
+
+SOKOL_API_IMPL float sapp_heightf(void) {
+    return (float)sapp_height();
+}
+
+SOKOL_API_IMPL int sapp_color_format(void) {
+    #if defined(_SAPP_EMSCRIPTEN) && defined(SOKOL_WGPU)
+        switch (_sapp.emsc.wgpu.render_format) {
+            case WGPUTextureFormat_RGBA8Unorm:
+                return _SAPP_PIXELFORMAT_RGBA8;
+            case WGPUTextureFormat_BGRA8Unorm:
+                return _SAPP_PIXELFORMAT_BGRA8;
+            default:
+                SOKOL_UNREACHABLE;
+                return 0;
+        }
+    #elif defined(SOKOL_METAL) || defined(SOKOL_D3D11)
+        return _SAPP_PIXELFORMAT_BGRA8;
+    #else
+        return _SAPP_PIXELFORMAT_RGBA8;
+    #endif
+}
+
+SOKOL_API_IMPL int sapp_depth_format(void) {
+    return _SAPP_PIXELFORMAT_DEPTH_STENCIL;
+}
+
+SOKOL_API_IMPL int sapp_sample_count(void) {
+    return _sapp.sample_count;
+}
+
+SOKOL_API_IMPL bool sapp_high_dpi(void) {
+    return _sapp.desc.high_dpi && (_sapp.dpi_scale >= 1.5f);
+}
+
+SOKOL_API_IMPL float sapp_dpi_scale(void) {
+    return _sapp.dpi_scale;
+}
+
+SOKOL_API_IMPL const void* sapp_egl_get_display(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_ANDROID)
+        return _sapp.android.display;
+    #elif defined(_SAPP_LINUX) && !defined(_SAPP_GLX)
+        return _sapp.egl.display;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_egl_get_context(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_ANDROID)
+        return _sapp.android.context;
+    #elif defined(_SAPP_LINUX) && !defined(_SAPP_GLX)
+        return _sapp.egl.context;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL void sapp_show_keyboard(bool show) {
+    #if defined(_SAPP_IOS)
+    _sapp_ios_show_keyboard(show);
+    #elif defined(_SAPP_EMSCRIPTEN)
+    _sapp_emsc_show_keyboard(show);
+    #elif defined(_SAPP_ANDROID)
+    _sapp_android_show_keyboard(show);
+    #else
+    _SOKOL_UNUSED(show);
+    #endif
+}
+
+SOKOL_API_IMPL bool sapp_keyboard_shown(void) {
+    return _sapp.onscreen_keyboard_shown;
+}
+
+SOKOL_API_IMPL bool sapp_is_fullscreen(void) {
+    return _sapp.fullscreen;
+}
+
+SOKOL_API_IMPL void sapp_toggle_fullscreen(void) {
+    #if defined(_SAPP_MACOS)
+    _sapp_macos_toggle_fullscreen();
+    #elif defined(_SAPP_WIN32)
+    _sapp_win32_toggle_fullscreen();
+    #elif defined(_SAPP_LINUX)
+    _sapp_x11_toggle_fullscreen();
+    #endif
+}
+
+/* NOTE that sapp_show_mouse() does not "stack" like the Win32 or macOS API functions! */
+SOKOL_API_IMPL void sapp_show_mouse(bool show) {
+    if (_sapp.mouse.shown != show) {
+        #if defined(_SAPP_MACOS)
+        _sapp_macos_update_cursor(_sapp.mouse.current_cursor, show);
+        #elif defined(_SAPP_WIN32)
+        _sapp_win32_update_cursor(_sapp.mouse.current_cursor, show, false);
+        #elif defined(_SAPP_LINUX)
+        _sapp_x11_update_cursor(_sapp.mouse.current_cursor, show);
+        #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_update_cursor(_sapp.mouse.current_cursor, show);
+        #endif
+        _sapp.mouse.shown = show;
+    }
+}
+
+SOKOL_API_IMPL bool sapp_mouse_shown(void) {
+    return _sapp.mouse.shown;
+}
+
+SOKOL_API_IMPL void sapp_lock_mouse(bool lock) {
+    #if defined(_SAPP_MACOS)
+    _sapp_macos_lock_mouse(lock);
+    #elif defined(_SAPP_EMSCRIPTEN)
+    _sapp_emsc_lock_mouse(lock);
+    #elif defined(_SAPP_WIN32)
+    _sapp_win32_lock_mouse(lock);
+    #elif defined(_SAPP_LINUX)
+    _sapp_x11_lock_mouse(lock);
+    #else
+    _sapp.mouse.locked = lock;
+    #endif
+}
+
+SOKOL_API_IMPL bool sapp_mouse_locked(void) {
+    return _sapp.mouse.locked;
+}
+
+SOKOL_API_IMPL void sapp_set_mouse_cursor(sapp_mouse_cursor cursor) {
+    SOKOL_ASSERT((cursor >= 0) && (cursor < _SAPP_MOUSECURSOR_NUM));
+    if (_sapp.mouse.current_cursor != cursor) {
+        #if defined(_SAPP_MACOS)
+        _sapp_macos_update_cursor(cursor, _sapp.mouse.shown);
+        #elif defined(_SAPP_WIN32)
+        _sapp_win32_update_cursor(cursor, _sapp.mouse.shown, false);
+        #elif defined(_SAPP_LINUX)
+        _sapp_x11_update_cursor(cursor, _sapp.mouse.shown);
+        #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_update_cursor(cursor, _sapp.mouse.shown);
+        #endif
+        _sapp.mouse.current_cursor = cursor;
+    }
+}
+
+SOKOL_API_IMPL sapp_mouse_cursor sapp_get_mouse_cursor(void) {
+    return _sapp.mouse.current_cursor;
+}
+
+SOKOL_API_IMPL void sapp_request_quit(void) {
+    _sapp.quit_requested = true;
+}
+
+SOKOL_API_IMPL void sapp_cancel_quit(void) {
+    _sapp.quit_requested = false;
+}
+
+SOKOL_API_IMPL void sapp_quit(void) {
+    _sapp.quit_ordered = true;
+}
+
+SOKOL_API_IMPL void sapp_consume_event(void) {
+    _sapp.event_consumed = true;
+}
+
+/* NOTE: on HTML5, sapp_set_clipboard_string() must be called from within event handler! */
+SOKOL_API_IMPL void sapp_set_clipboard_string(const char* str) {
+    if (!_sapp.clipboard.enabled) {
+        return;
+    }
+    SOKOL_ASSERT(str);
+    #if defined(_SAPP_MACOS)
+        _sapp_macos_set_clipboard_string(str);
+    #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_set_clipboard_string(str);
+    #elif defined(_SAPP_WIN32)
+        _sapp_win32_set_clipboard_string(str);
+    #else
+        /* not implemented */
+    #endif
+    _sapp_strcpy(str, _sapp.clipboard.buffer, _sapp.clipboard.buf_size);
+}
+
+SOKOL_API_IMPL const char* sapp_get_clipboard_string(void) {
+    if (!_sapp.clipboard.enabled) {
+        return "";
+    }
+    #if defined(_SAPP_MACOS)
+        return _sapp_macos_get_clipboard_string();
+    #elif defined(_SAPP_EMSCRIPTEN)
+        return _sapp.clipboard.buffer;
+    #elif defined(_SAPP_WIN32)
+        return _sapp_win32_get_clipboard_string();
+    #else
+        /* not implemented */
+        return _sapp.clipboard.buffer;
+    #endif
+}
+
+SOKOL_API_IMPL void sapp_set_window_title(const char* title) {
+    SOKOL_ASSERT(title);
+    _sapp_strcpy(title, _sapp.window_title, sizeof(_sapp.window_title));
+    #if defined(_SAPP_MACOS)
+        _sapp_macos_update_window_title();
+    #elif defined(_SAPP_WIN32)
+        _sapp_win32_update_window_title();
+    #elif defined(_SAPP_LINUX)
+        _sapp_x11_update_window_title();
+    #endif
+}
+
+SOKOL_API_IMPL void sapp_set_icon(const sapp_icon_desc* desc) {
+    SOKOL_ASSERT(desc);
+    if (desc->sokol_default) {
+        if (0 == _sapp.default_icon_pixels) {
+            _sapp_setup_default_icon();
+        }
+        SOKOL_ASSERT(0 != _sapp.default_icon_pixels);
+        desc = &_sapp.default_icon_desc;
+    }
+    const int num_images = _sapp_icon_num_images(desc);
+    if (num_images == 0) {
+        return;
+    }
+    SOKOL_ASSERT((num_images > 0) && (num_images <= SAPP_MAX_ICONIMAGES));
+    if (!_sapp_validate_icon_desc(desc, num_images)) {
+        return;
+    }
+    #if defined(_SAPP_MACOS)
+        _sapp_macos_set_icon(desc, num_images);
+    #elif defined(_SAPP_WIN32)
+        _sapp_win32_set_icon(desc, num_images);
+    #elif defined(_SAPP_LINUX)
+        _sapp_x11_set_icon(desc, num_images);
+    #elif defined(_SAPP_EMSCRIPTEN)
+        _sapp_emsc_set_icon(desc, num_images);
+    #endif
+}
+
+SOKOL_API_IMPL int sapp_get_num_dropped_files(void) {
+    SOKOL_ASSERT(_sapp.drop.enabled);
+    return _sapp.drop.num_files;
+}
+
+SOKOL_API_IMPL const char* sapp_get_dropped_file_path(int index) {
+    SOKOL_ASSERT(_sapp.drop.enabled);
+    SOKOL_ASSERT((index >= 0) && (index < _sapp.drop.num_files));
+    SOKOL_ASSERT(_sapp.drop.buffer);
+    if (!_sapp.drop.enabled) {
+        return "";
+    }
+    if ((index < 0) || (index >= _sapp.drop.max_files)) {
+        return "";
+    }
+    return (const char*) _sapp_dropped_file_path_ptr(index);
+}
+
+SOKOL_API_IMPL uint32_t sapp_html5_get_dropped_file_size(int index) {
+    SOKOL_ASSERT(_sapp.drop.enabled);
+    SOKOL_ASSERT((index >= 0) && (index < _sapp.drop.num_files));
+    #if defined(_SAPP_EMSCRIPTEN)
+        if (!_sapp.drop.enabled) {
+            return 0;
+        }
+        return sapp_js_dropped_file_size(index);
+    #else
+        (void)index;
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL void sapp_html5_fetch_dropped_file(const sapp_html5_fetch_request* request) {
+    SOKOL_ASSERT(_sapp.drop.enabled);
+    SOKOL_ASSERT(request);
+    SOKOL_ASSERT(request->callback);
+    SOKOL_ASSERT(request->buffer.ptr);
+    SOKOL_ASSERT(request->buffer.size > 0);
+    #if defined(_SAPP_EMSCRIPTEN)
+        const int index = request->dropped_file_index;
+        sapp_html5_fetch_error error_code = SAPP_HTML5_FETCH_ERROR_NO_ERROR;
+        if ((index < 0) || (index >= _sapp.drop.num_files)) {
+            error_code = SAPP_HTML5_FETCH_ERROR_OTHER;
+        }
+        if (sapp_html5_get_dropped_file_size(index) > request->buffer.size) {
+            error_code = SAPP_HTML5_FETCH_ERROR_BUFFER_TOO_SMALL;
+        }
+        if (SAPP_HTML5_FETCH_ERROR_NO_ERROR != error_code) {
+            _sapp_emsc_invoke_fetch_cb(index,
+                false, // success
+                (int)error_code,
+                request->callback,
+                0, // fetched_size
+                (void*)request->buffer.ptr,
+                request->buffer.size,
+                request->user_data);
+        }
+        else {
+            sapp_js_fetch_dropped_file(index,
+                request->callback,
+                (void*)request->buffer.ptr,
+                request->buffer.size,
+                request->user_data);
+        }
+    #else
+        (void)request;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_metal_get_device(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_METAL)
+        #if defined(_SAPP_MACOS)
+            const void* obj = (__bridge const void*) _sapp.macos.mtl_device;
+        #else
+            const void* obj = (__bridge const void*) _sapp.ios.mtl_device;
+        #endif
+        SOKOL_ASSERT(obj);
+        return obj;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_metal_get_renderpass_descriptor(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_METAL)
+        #if defined(_SAPP_MACOS)
+            const void* obj = (__bridge const void*) [_sapp.macos.view currentRenderPassDescriptor];
+        #else
+            const void* obj = (__bridge const void*) [_sapp.ios.view currentRenderPassDescriptor];
+        #endif
+        SOKOL_ASSERT(obj);
+        return obj;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_metal_get_drawable(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_METAL)
+        #if defined(_SAPP_MACOS)
+            const void* obj = (__bridge const void*) [_sapp.macos.view currentDrawable];
+        #else
+            const void* obj = (__bridge const void*) [_sapp.ios.view currentDrawable];
+        #endif
+        SOKOL_ASSERT(obj);
+        return obj;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_macos_get_window(void) {
+    #if defined(_SAPP_MACOS)
+        const void* obj = (__bridge const void*) _sapp.macos.window;
+        SOKOL_ASSERT(obj);
+        return obj;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_ios_get_window(void) {
+    #if defined(_SAPP_IOS)
+        const void* obj = (__bridge const void*) _sapp.ios.window;
+        SOKOL_ASSERT(obj);
+        return obj;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_d3d11_get_device(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_D3D11)
+        return _sapp.d3d11.device;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_d3d11_get_device_context(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_D3D11)
+        return _sapp.d3d11.device_context;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_d3d11_get_swap_chain(void) {
+    SOKOL_ASSERT(_sapp.valid);
+#if defined(SOKOL_D3D11)
+    return _sapp.d3d11.swap_chain;
+#else
+    return 0;
+#endif
+}
+
+SOKOL_API_IMPL const void* sapp_d3d11_get_render_target_view(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_D3D11)
+        if (_sapp.d3d11.msaa_rtv) {
+            return _sapp.d3d11.msaa_rtv;
+        }
+        else {
+            return _sapp.d3d11.rtv;
+        }
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_d3d11_get_depth_stencil_view(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(SOKOL_D3D11)
+        return _sapp.d3d11.dsv;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_win32_get_hwnd(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_WIN32)
+        return _sapp.win32.hwnd;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_wgpu_get_device(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_EMSCRIPTEN) && defined(SOKOL_WGPU)
+        return (const void*) _sapp.emsc.wgpu.device;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_wgpu_get_render_view(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_EMSCRIPTEN) && defined(SOKOL_WGPU)
+        if (_sapp.sample_count > 1) {
+            return (const void*) _sapp.emsc.wgpu.msaa_view;
+        }
+        else {
+            return (const void*) _sapp.emsc.wgpu.swapchain_view;
+        }
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_wgpu_get_resolve_view(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_EMSCRIPTEN) && defined(SOKOL_WGPU)
+        if (_sapp.sample_count > 1) {
+            return (const void*) _sapp.emsc.wgpu.swapchain_view;
+        }
+        else {
+            return 0;
+        }
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_wgpu_get_depth_stencil_view(void) {
+    SOKOL_ASSERT(_sapp.valid);
+    #if defined(_SAPP_EMSCRIPTEN) && defined(SOKOL_WGPU)
+        return (const void*) _sapp.emsc.wgpu.depth_stencil_view;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL const void* sapp_android_get_native_activity(void) {
+    // NOTE: _sapp.valid is not asserted here because sapp_android_get_native_activity()
+    // needs to be callable from within sokol_main() (see: https://github.com/floooh/sokol/issues/708)
+    #if defined(_SAPP_ANDROID)
+        return (void*)_sapp.android.activity;
+    #else
+        return 0;
+    #endif
+}
+
+SOKOL_API_IMPL void sapp_html5_ask_leave_site(bool ask) {
+    _sapp.html5_ask_leave_site = ask;
+}
+
+#endif /* SOKOL_APP_IMPL */