Remove fonts

6 files changed, 6 insertions, 13170 deletions

diff --git a/Domitian Roman.ttf b/Domitian Roman.ttf
deleted file mode 100644
index 01c0ee6..0000000
--- a/Domitian Roman.ttf
+++ /dev/null
diff --git a/FontAwesome 6 Free Solid 900.ttf b/FontAwesome 6 Free Solid 900.ttf
deleted file mode 100644
index d749e87..0000000
--- a/FontAwesome 6 Free Solid 900.ttf
+++ /dev/null
diff --git a/OFL.txt b/OFL.txt
deleted file mode 100644
index 0ea241c..0000000
--- a/OFL.txt
+++ /dev/null
@@ -1,95 +0,0 @@
-Copyright (c) 2023 Fonticons, Inc. (https://fontawesome.com)
-with Reserved Font Name: "Font Awesome".
-Copyright (c) 2019, 2020 Daniel Benjamin Miller
-
-This Font Software is licensed under the SIL Open Font License, Version 1.1.
-This license is copied below, and is also available with a FAQ at:
-https://openfontlicense.org
-
-
------------------------------------------------------------
-SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
------------------------------------------------------------
-
-PREAMBLE
-The goals of the Open Font License (OFL) are to stimulate worldwide
-development of collaborative font projects, to support the font creation
-efforts of academic and linguistic communities, and to provide a free and
-open framework in which fonts may be shared and improved in partnership
-with others.
-
-The OFL allows the licensed fonts to be used, studied, modified and
-redistributed freely as long as they are not sold by themselves. The
-fonts, including any derivative works, can be bundled, embedded, 
-redistributed and/or sold with any software provided that any reserved
-names are not used by derivative works. The fonts and derivatives,
-however, cannot be released under any other type of license. The
-requirement for fonts to remain under this license does not apply
-to any document created using the fonts or their derivatives.
-
-DEFINITIONS
-"Font Software" refers to the set of files released by the Copyright
-Holder(s) under this license and clearly marked as such. This may
-include source files, build scripts and documentation.
-
-"Reserved Font Name" refers to any names specified as such after the
-copyright statement(s).
-
-"Original Version" refers to the collection of Font Software components as
-distributed by the Copyright Holder(s).
-
-"Modified Version" refers to any derivative made by adding to, deleting,
-or substituting -- in part or in whole -- any of the components of the
-Original Version, by changing formats or by porting the Font Software to a
-new environment.
-
-"Author" refers to any designer, engineer, programmer, technical
-writer or other person who contributed to the Font Software.
-
-PERMISSION & CONDITIONS
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of the Font Software, to use, study, copy, merge, embed, modify,
-redistribute, and sell modified and unmodified copies of the Font
-Software, subject to the following conditions:
-
-1) Neither the Font Software nor any of its individual components,
-in Original or Modified Versions, may be sold by itself.
-
-2) Original or Modified Versions of the Font Software may be bundled,
-redistributed and/or sold with any software, provided that each copy
-contains the above copyright notice and this license. These can be
-included either as stand-alone text files, human-readable headers or
-in the appropriate machine-readable metadata fields within text or
-binary files as long as those fields can be easily viewed by the user.
-
-3) No Modified Version of the Font Software may use the Reserved Font
-Name(s) unless explicit written permission is granted by the corresponding
-Copyright Holder. This restriction only applies to the primary font name as
-presented to the users.
-
-4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
-Software shall not be used to promote, endorse or advertise any
-Modified Version, except to acknowledge the contribution(s) of the
-Copyright Holder(s) and the Author(s) or with their explicit written
-permission.
-
-5) The Font Software, modified or unmodified, in part or in whole,
-must be distributed entirely under this license, and must not be
-distributed under any other license. The requirement for fonts to
-remain under this license does not apply to any document created
-using the Font Software.
-
-TERMINATION
-This license becomes null and void if any of the above conditions are
-not met.
-
-DISCLAIMER
-THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
-OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
-COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
-DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
-OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/saw.c b/saw.c
index 0a033ed..0a7c1f5 100755
--- a/saw.c
+++ b/saw.c
@@ -258,7 +258,7 @@ exit $? # */
 #if !CODEGEN      && \
     !EXE          && \
     !TESTS
-#define BUILDME 1
+#define EXE 1
 #endif
 #define _GNU_SOURCE
 //  ================================================================
@@ -4224,25 +4224,20 @@ sapp_desc sokol_main(i32 argc, c8 **argv) {
   };
 }
 
+#endif // EXE
+
 //  ================================================================
 //
 //    TESTS
 //
 //  ================================================================
 
-#elif TESTS
-
-#include "kit/types.h"
+#if TESTS
 
-#define KIT_TEST_IMPLEMENTATION
-#include "kit/test.h"
+#include "test.c"
 
 i32 main(i32 argc, char **argv) {
   return run_tests(argc, argv);
 }
 
-//  ================================================================
-
-#else
-#error Build options not provided. Try: gcc -DBUILDME=1 saw.c
-#endif
+#endif // TESTS
diff --git a/stb_image.h b/stb_image.h
deleted file mode 100644
index 5e807a0..0000000
--- a/stb_image.h
+++ /dev/null
@@ -1,7987 +0,0 @@
-/* stb_image - v2.28 - public domain image loader - http://nothings.org/stb
-                                  no warranty implied; use at your own risk
-
-   Do this:
-      #define STB_IMAGE_IMPLEMENTATION
-   before you include this file in *one* C or C++ file to create the implementation.
-
-   // i.e. it should look like this:
-   #include ...
-   #include ...
-   #include ...
-   #define STB_IMAGE_IMPLEMENTATION
-   #include "stb_image.h"
-
-   You can #define STBI_ASSERT(x) before the #include to avoid using assert.h.
-   And #define STBI_MALLOC, STBI_REALLOC, and STBI_FREE to avoid using malloc,realloc,free
-
-
-   QUICK NOTES:
-      Primarily of interest to game developers and other people who can
-          avoid problematic images and only need the trivial interface
-
-      JPEG baseline & progressive (12 bpc/arithmetic not supported, same as stock IJG lib)
-      PNG 1/2/4/8/16-bit-per-channel
-
-      TGA (not sure what subset, if a subset)
-      BMP non-1bpp, non-RLE
-      PSD (composited view only, no extra channels, 8/16 bit-per-channel)
-
-      GIF (*comp always reports as 4-channel)
-      HDR (radiance rgbE format)
-      PIC (Softimage PIC)
-      PNM (PPM and PGM binary only)
-
-      Animated GIF still needs a proper API, but here's one way to do it:
-          http://gist.github.com/urraka/685d9a6340b26b830d49
-
-      - decode from memory or through FILE (define STBI_NO_STDIO to remove code)
-      - decode from arbitrary I/O callbacks
-      - SIMD acceleration on x86/x64 (SSE2) and ARM (NEON)
-
-   Full documentation under "DOCUMENTATION" below.
-
-
-LICENSE
-
-  See end of file for license information.
-
-RECENT REVISION HISTORY:
-
-      2.28  (2023-01-29) many error fixes, security errors, just tons of stuff
-      2.27  (2021-07-11) document stbi_info better, 16-bit PNM support, bug fixes
-      2.26  (2020-07-13) many minor fixes
-      2.25  (2020-02-02) fix warnings
-      2.24  (2020-02-02) fix warnings; thread-local failure_reason and flip_vertically
-      2.23  (2019-08-11) fix clang static analysis warning
-      2.22  (2019-03-04) gif fixes, fix warnings
-      2.21  (2019-02-25) fix typo in comment
-      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
-      2.19  (2018-02-11) fix warning
-      2.18  (2018-01-30) fix warnings
-      2.17  (2018-01-29) bugfix, 1-bit BMP, 16-bitness query, fix warnings
-      2.16  (2017-07-23) all functions have 16-bit variants; optimizations; bugfixes
-      2.15  (2017-03-18) fix png-1,2,4; all Imagenet JPGs; no runtime SSE detection on GCC
-      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
-      2.13  (2016-12-04) experimental 16-bit API, only for PNG so far; fixes
-      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
-      2.11  (2016-04-02) 16-bit PNGS; enable SSE2 in non-gcc x64
-                         RGB-format JPEG; remove white matting in PSD;
-                         allocate large structures on the stack;
-                         correct channel count for PNG & BMP
-      2.10  (2016-01-22) avoid warning introduced in 2.09
-      2.09  (2016-01-16) 16-bit TGA; comments in PNM files; STBI_REALLOC_SIZED
-
-   See end of file for full revision history.
-
-
- ============================    Contributors    =========================
-
- Image formats                          Extensions, features
-    Sean Barrett (jpeg, png, bmp)          Jetro Lauha (stbi_info)
-    Nicolas Schulz (hdr, psd)              Martin "SpartanJ" Golini (stbi_info)
-    Jonathan Dummer (tga)                  James "moose2000" Brown (iPhone PNG)
-    Jean-Marc Lienher (gif)                Ben "Disch" Wenger (io callbacks)
-    Tom Seddon (pic)                       Omar Cornut (1/2/4-bit PNG)
-    Thatcher Ulrich (psd)                  Nicolas Guillemot (vertical flip)
-    Ken Miller (pgm, ppm)                  Richard Mitton (16-bit PSD)
-    github:urraka (animated gif)           Junggon Kim (PNM comments)
-    Christopher Forseth (animated gif)     Daniel Gibson (16-bit TGA)
-                                           socks-the-fox (16-bit PNG)
-                                           Jeremy Sawicki (handle all ImageNet JPGs)
- Optimizations & bugfixes                  Mikhail Morozov (1-bit BMP)
-    Fabian "ryg" Giesen                    Anael Seghezzi (is-16-bit query)
-    Arseny Kapoulkine                      Simon Breuss (16-bit PNM)
-    John-Mark Allen
-    Carmelo J Fdez-Aguera
-
- Bug & warning fixes
-    Marc LeBlanc            David Woo          Guillaume George     Martins Mozeiko
-    Christpher Lloyd        Jerry Jansson      Joseph Thomson       Blazej Dariusz Roszkowski
-    Phil Jordan                                Dave Moore           Roy Eltham
-    Hayaki Saito            Nathan Reed        Won Chun
-    Luke Graham             Johan Duparc       Nick Verigakis       the Horde3D community
-    Thomas Ruf              Ronny Chevalier                         github:rlyeh
-    Janez Zemva             John Bartholomew   Michal Cichon        github:romigrou
-    Jonathan Blow           Ken Hamada         Tero Hanninen        github:svdijk
-    Eugene Golushkov        Laurent Gomila     Cort Stratton        github:snagar
-    Aruelien Pocheville     Sergio Gonzalez    Thibault Reuille     github:Zelex
-    Cass Everitt            Ryamond Barbiero                        github:grim210
-    Paul Du Bois            Engin Manap        Aldo Culquicondor    github:sammyhw
-    Philipp Wiesemann       Dale Weiler        Oriol Ferrer Mesia   github:phprus
-    Josh Tobin              Neil Bickford      Matthew Gregan       github:poppolopoppo
-    Julian Raschke          Gregory Mullen     Christian Floisand   github:darealshinji
-    Baldur Karlsson         Kevin Schmidt      JR Smith             github:Michaelangel007
-                            Brad Weinberger    Matvey Cherevko      github:mosra
-    Luca Sas                Alexander Veselov  Zack Middleton       [reserved]
-    Ryan C. Gordon          [reserved]                              [reserved]
-                     DO NOT ADD YOUR NAME HERE
-
-                     Jacko Dirks
-
-  To add your name to the credits, pick a random blank space in the middle and fill it.
-  80% of merge conflicts on stb PRs are due to people adding their name at the end
-  of the credits.
-*/
-
-#ifndef STBI_INCLUDE_STB_IMAGE_H
-#define STBI_INCLUDE_STB_IMAGE_H
-
-// DOCUMENTATION
-//
-// Limitations:
-//    - no 12-bit-per-channel JPEG
-//    - no JPEGs with arithmetic coding
-//    - GIF always returns *comp=4
-//
-// Basic usage (see HDR discussion below for HDR usage):
-//    int x,y,n;
-//    unsigned char *data = stbi_load(filename, &x, &y, &n, 0);
-//    // ... process data if not NULL ...
-//    // ... x = width, y = height, n = # 8-bit components per pixel ...
-//    // ... replace '0' with '1'..'4' to force that many components per pixel
-//    // ... but 'n' will always be the number that it would have been if you said 0
-//    stbi_image_free(data);
-//
-// Standard parameters:
-//    int *x                 -- outputs image width in pixels
-//    int *y                 -- outputs image height in pixels
-//    int *channels_in_file  -- outputs # of image components in image file
-//    int desired_channels   -- if non-zero, # of image components requested in result
-//
-// The return value from an image loader is an 'unsigned char *' which points
-// to the pixel data, or NULL on an allocation failure or if the image is
-// corrupt or invalid. The pixel data consists of *y scanlines of *x pixels,
-// with each pixel consisting of N interleaved 8-bit components; the first
-// pixel pointed to is top-left-most in the image. There is no padding between
-// image scanlines or between pixels, regardless of format. The number of
-// components N is 'desired_channels' if desired_channels is non-zero, or
-// *channels_in_file otherwise. If desired_channels is non-zero,
-// *channels_in_file has the number of components that _would_ have been
-// output otherwise. E.g. if you set desired_channels to 4, you will always
-// get RGBA output, but you can check *channels_in_file to see if it's trivially
-// opaque because e.g. there were only 3 channels in the source image.
-//
-// An output image with N components has the following components interleaved
-// in this order in each pixel:
-//
-//     N=#comp     components
-//       1           grey
-//       2           grey, alpha
-//       3           red, green, blue
-//       4           red, green, blue, alpha
-//
-// If image loading fails for any reason, the return value will be NULL,
-// and *x, *y, *channels_in_file will be unchanged. The function
-// stbi_failure_reason() can be queried for an extremely brief, end-user
-// unfriendly explanation of why the load failed. Define STBI_NO_FAILURE_STRINGS
-// to avoid compiling these strings at all, and STBI_FAILURE_USERMSG to get slightly
-// more user-friendly ones.
-//
-// Paletted PNG, BMP, GIF, and PIC images are automatically depalettized.
-//
-// To query the width, height and component count of an image without having to
-// decode the full file, you can use the stbi_info family of functions:
-//
-//   int x,y,n,ok;
-//   ok = stbi_info(filename, &x, &y, &n);
-//   // returns ok=1 and sets x, y, n if image is a supported format,
-//   // 0 otherwise.
-//
-// Note that stb_image pervasively uses ints in its public API for sizes,
-// including sizes of memory buffers. This is now part of the API and thus
-// hard to change without causing breakage. As a result, the various image
-// loaders all have certain limits on image size; these differ somewhat
-// by format but generally boil down to either just under 2GB or just under
-// 1GB. When the decoded image would be larger than this, stb_image decoding
-// will fail.
-//
-// Additionally, stb_image will reject image files that have any of their
-// dimensions set to a larger value than the configurable STBI_MAX_DIMENSIONS,
-// which defaults to 2**24 = 16777216 pixels. Due to the above memory limit,
-// the only way to have an image with such dimensions load correctly
-// is for it to have a rather extreme aspect ratio. Either way, the
-// assumption here is that such larger images are likely to be malformed
-// or malicious. If you do need to load an image with individual dimensions
-// larger than that, and it still fits in the overall size limit, you can
-// #define STBI_MAX_DIMENSIONS on your own to be something larger.
-//
-// ===========================================================================
-//
-// UNICODE:
-//
-//   If compiling for Windows and you wish to use Unicode filenames, compile
-//   with
-//       #define STBI_WINDOWS_UTF8
-//   and pass utf8-encoded filenames. Call stbi_convert_wchar_to_utf8 to convert
-//   Windows wchar_t filenames to utf8.
-//
-// ===========================================================================
-//
-// Philosophy
-//
-// stb libraries are designed with the following priorities:
-//
-//    1. easy to use
-//    2. easy to maintain
-//    3. good performance
-//
-// Sometimes I let "good performance" creep up in priority over "easy to maintain",
-// and for best performance I may provide less-easy-to-use APIs that give higher
-// performance, in addition to the easy-to-use ones. Nevertheless, it's important
-// to keep in mind that from the standpoint of you, a client of this library,
-// all you care about is #1 and #3, and stb libraries DO NOT emphasize #3 above all.
-//
-// Some secondary priorities arise directly from the first two, some of which
-// provide more explicit reasons why performance can't be emphasized.
-//
-//    - Portable ("ease of use")
-//    - Small source code footprint ("easy to maintain")
-//    - No dependencies ("ease of use")
-//
-// ===========================================================================
-//
-// I/O callbacks
-//
-// I/O callbacks allow you to read from arbitrary sources, like packaged
-// files or some other source. Data read from callbacks are processed
-// through a small internal buffer (currently 128 bytes) to try to reduce
-// overhead.
-//
-// The three functions you must define are "read" (reads some bytes of data),
-// "skip" (skips some bytes of data), "eof" (reports if the stream is at the end).
-//
-// ===========================================================================
-//
-// SIMD support
-//
-// The JPEG decoder will try to automatically use SIMD kernels on x86 when
-// supported by the compiler. For ARM Neon support, you must explicitly
-// request it.
-//
-// (The old do-it-yourself SIMD API is no longer supported in the current
-// code.)
-//
-// On x86, SSE2 will automatically be used when available based on a run-time
-// test; if not, the generic C versions are used as a fall-back. On ARM targets,
-// the typical path is to have separate builds for NEON and non-NEON devices
-// (at least this is true for iOS and Android). Therefore, the NEON support is
-// toggled by a build flag: define STBI_NEON to get NEON loops.
-//
-// If for some reason you do not want to use any of SIMD code, or if
-// you have issues compiling it, you can disable it entirely by
-// defining STBI_NO_SIMD.
-//
-// ===========================================================================
-//
-// HDR image support   (disable by defining STBI_NO_HDR)
-//
-// stb_image supports loading HDR images in general, and currently the Radiance
-// .HDR file format specifically. You can still load any file through the existing
-// interface; if you attempt to load an HDR file, it will be automatically remapped
-// to LDR, assuming gamma 2.2 and an arbitrary scale factor defaulting to 1;
-// both of these constants can be reconfigured through this interface:
-//
-//     stbi_hdr_to_ldr_gamma(2.2f);
-//     stbi_hdr_to_ldr_scale(1.0f);
-//
-// (note, do not use _inverse_ constants; stbi_image will invert them
-// appropriately).
-//
-// Additionally, there is a new, parallel interface for loading files as
-// (linear) floats to preserve the full dynamic range:
-//
-//    float *data = stbi_loadf(filename, &x, &y, &n, 0);
-//
-// If you load LDR images through this interface, those images will
-// be promoted to floating point values, run through the inverse of
-// constants corresponding to the above:
-//
-//     stbi_ldr_to_hdr_scale(1.0f);
-//     stbi_ldr_to_hdr_gamma(2.2f);
-//
-// Finally, given a filename (or an open file or memory block--see header
-// file for details) containing image data, you can query for the "most
-// appropriate" interface to use (that is, whether the image is HDR or
-// not), using:
-//
-//     stbi_is_hdr(char *filename);
-//
-// ===========================================================================
-//
-// iPhone PNG support:
-//
-// We optionally support converting iPhone-formatted PNGs (which store
-// premultiplied BGRA) back to RGB, even though they're internally encoded
-// differently. To enable this conversion, call
-// stbi_convert_iphone_png_to_rgb(1).
-//
-// Call stbi_set_unpremultiply_on_load(1) as well to force a divide per
-// pixel to remove any premultiplied alpha *only* if the image file explicitly
-// says there's premultiplied data (currently only happens in iPhone images,
-// and only if iPhone convert-to-rgb processing is on).
-//
-// ===========================================================================
-//
-// ADDITIONAL CONFIGURATION
-//
-//  - You can suppress implementation of any of the decoders to reduce
-//    your code footprint by #defining one or more of the following
-//    symbols before creating the implementation.
-//
-//        STBI_NO_JPEG
-//        STBI_NO_PNG
-//        STBI_NO_BMP
-//        STBI_NO_PSD
-//        STBI_NO_TGA
-//        STBI_NO_GIF
-//        STBI_NO_HDR
-//        STBI_NO_PIC
-//        STBI_NO_PNM   (.ppm and .pgm)
-//
-//  - You can request *only* certain decoders and suppress all other ones
-//    (this will be more forward-compatible, as addition of new decoders
-//    doesn't require you to disable them explicitly):
-//
-//        STBI_ONLY_JPEG
-//        STBI_ONLY_PNG
-//        STBI_ONLY_BMP
-//        STBI_ONLY_PSD
-//        STBI_ONLY_TGA
-//        STBI_ONLY_GIF
-//        STBI_ONLY_HDR
-//        STBI_ONLY_PIC
-//        STBI_ONLY_PNM   (.ppm and .pgm)
-//
-//   - If you use STBI_NO_PNG (or _ONLY_ without PNG), and you still
-//     want the zlib decoder to be available, #define STBI_SUPPORT_ZLIB
-//
-//  - If you define STBI_MAX_DIMENSIONS, stb_image will reject images greater
-//    than that size (in either width or height) without further processing.
-//    This is to let programs in the wild set an upper bound to prevent
-//    denial-of-service attacks on untrusted data, as one could generate a
-//    valid image of gigantic dimensions and force stb_image to allocate a
-//    huge block of memory and spend disproportionate time decoding it. By
-//    default this is set to (1 << 24), which is 16777216, but that's still
-//    very big.
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif // STBI_NO_STDIO
-
-#define STBI_VERSION 1
-
-enum
-{
-   STBI_default = 0, // only used for desired_channels
-
-   STBI_grey       = 1,
-   STBI_grey_alpha = 2,
-   STBI_rgb        = 3,
-   STBI_rgb_alpha  = 4
-};
-
-#include <stdlib.h>
-typedef unsigned char stbi_uc;
-typedef unsigned short stbi_us;
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef STBIDEF
-#ifdef STB_IMAGE_STATIC
-#define STBIDEF static
-#else
-#define STBIDEF extern
-#endif
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// PRIMARY API - works on images of any type
-//
-
-//
-// load image by filename, open file, or memory buffer
-//
-
-typedef struct
-{
-   int      (*read)  (void *user,char *data,int size);   // fill 'data' with 'size' bytes.  return number of bytes actually read
-   void     (*skip)  (void *user,int n);                 // skip the next 'n' bytes, or 'unget' the last -n bytes if negative
-   int      (*eof)   (void *user);                       // returns nonzero if we are at end of file/data
-} stbi_io_callbacks;
-
-////////////////////////////////////
-//
-// 8-bits-per-channel interface
-//
-
-STBIDEF stbi_uc *stbi_load_from_memory   (stbi_uc           const *buffer, int len   , int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk  , void *user, int *x, int *y, int *channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_uc *stbi_load            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_uc *stbi_load_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-// for stbi_load_from_file, file pointer is left pointing immediately after image
-#endif
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
-#endif
-
-#ifdef STBI_WINDOWS_UTF8
-STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input);
-#endif
-
-////////////////////////////////////
-//
-// 16-bits-per-channel interface
-//
-
-STBIDEF stbi_us *stbi_load_16_from_memory   (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels);
-
-#ifndef STBI_NO_STDIO
-STBIDEF stbi_us *stbi_load_16          (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-STBIDEF stbi_us *stbi_load_from_file_16(FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-#endif
-
-////////////////////////////////////
-//
-// float-per-channel interface
-//
-#ifndef STBI_NO_LINEAR
-   STBIDEF float *stbi_loadf_from_memory     (stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels);
-   STBIDEF float *stbi_loadf_from_callbacks  (stbi_io_callbacks const *clbk, void *user, int *x, int *y,  int *channels_in_file, int desired_channels);
-
-   #ifndef STBI_NO_STDIO
-   STBIDEF float *stbi_loadf            (char const *filename, int *x, int *y, int *channels_in_file, int desired_channels);
-   STBIDEF float *stbi_loadf_from_file  (FILE *f, int *x, int *y, int *channels_in_file, int desired_channels);
-   #endif
-#endif
-
-#ifndef STBI_NO_HDR
-   STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma);
-   STBIDEF void   stbi_hdr_to_ldr_scale(float scale);
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_LINEAR
-   STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma);
-   STBIDEF void   stbi_ldr_to_hdr_scale(float scale);
-#endif // STBI_NO_LINEAR
-
-// stbi_is_hdr is always defined, but always returns false if STBI_NO_HDR
-STBIDEF int    stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user);
-STBIDEF int    stbi_is_hdr_from_memory(stbi_uc const *buffer, int len);
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_is_hdr          (char const *filename);
-STBIDEF int      stbi_is_hdr_from_file(FILE *f);
-#endif // STBI_NO_STDIO
-
-
-// get a VERY brief reason for failure
-// on most compilers (and ALL modern mainstream compilers) this is threadsafe
-STBIDEF const char *stbi_failure_reason  (void);
-
-// free the loaded image -- this is just free()
-STBIDEF void     stbi_image_free      (void *retval_from_stbi_load);
-
-// get image dimensions & components without fully decoding
-STBIDEF int      stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp);
-STBIDEF int      stbi_info_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp);
-STBIDEF int      stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len);
-STBIDEF int      stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *clbk, void *user);
-
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_info               (char const *filename,     int *x, int *y, int *comp);
-STBIDEF int      stbi_info_from_file     (FILE *f,                  int *x, int *y, int *comp);
-STBIDEF int      stbi_is_16_bit          (char const *filename);
-STBIDEF int      stbi_is_16_bit_from_file(FILE *f);
-#endif
-
-
-
-// for image formats that explicitly notate that they have premultiplied alpha,
-// we just return the colors as stored in the file. set this flag to force
-// unpremultiplication. results are undefined if the unpremultiply overflow.
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply);
-
-// indicate whether we should process iphone images back to canonical format,
-// or just pass them through "as-is"
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert);
-
-// flip the image vertically, so the first pixel in the output array is the bottom left
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip);
-
-// as above, but only applies to images loaded on the thread that calls the function
-// this function is only available if your compiler supports thread-local variables;
-// calling it will fail to link if your compiler doesn't
-STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply);
-STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert);
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip);
-
-// ZLIB client - used by PNG, available for other purposes
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen);
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header);
-STBIDEF char *stbi_zlib_decode_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int   stbi_zlib_decode_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(const char *buffer, int len, int *outlen);
-STBIDEF int   stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen);
-
-
-#ifdef __cplusplus
-}
-#endif
-
-//
-//
-////   end header file   /////////////////////////////////////////////////////
-#endif // STBI_INCLUDE_STB_IMAGE_H
-
-#ifdef STB_IMAGE_IMPLEMENTATION
-
-#if defined(STBI_ONLY_JPEG) || defined(STBI_ONLY_PNG) || defined(STBI_ONLY_BMP) \
-  || defined(STBI_ONLY_TGA) || defined(STBI_ONLY_GIF) || defined(STBI_ONLY_PSD) \
-  || defined(STBI_ONLY_HDR) || defined(STBI_ONLY_PIC) || defined(STBI_ONLY_PNM) \
-  || defined(STBI_ONLY_ZLIB)
-   #ifndef STBI_ONLY_JPEG
-   #define STBI_NO_JPEG
-   #endif
-   #ifndef STBI_ONLY_PNG
-   #define STBI_NO_PNG
-   #endif
-   #ifndef STBI_ONLY_BMP
-   #define STBI_NO_BMP
-   #endif
-   #ifndef STBI_ONLY_PSD
-   #define STBI_NO_PSD
-   #endif
-   #ifndef STBI_ONLY_TGA
-   #define STBI_NO_TGA
-   #endif
-   #ifndef STBI_ONLY_GIF
-   #define STBI_NO_GIF
-   #endif
-   #ifndef STBI_ONLY_HDR
-   #define STBI_NO_HDR
-   #endif
-   #ifndef STBI_ONLY_PIC
-   #define STBI_NO_PIC
-   #endif
-   #ifndef STBI_ONLY_PNM
-   #define STBI_NO_PNM
-   #endif
-#endif
-
-#if defined(STBI_NO_PNG) && !defined(STBI_SUPPORT_ZLIB) && !defined(STBI_NO_ZLIB)
-#define STBI_NO_ZLIB
-#endif
-
-
-#include <stdarg.h>
-#include <stddef.h> // ptrdiff_t on osx
-#include <stdlib.h>
-#include <string.h>
-#include <limits.h>
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR)
-#include <math.h>  // ldexp, pow
-#endif
-
-#ifndef STBI_NO_STDIO
-#include <stdio.h>
-#endif
-
-#ifndef STBI_ASSERT
-#include <assert.h>
-#define STBI_ASSERT(x) assert(x)
-#endif
-
-#ifdef __cplusplus
-#define STBI_EXTERN extern "C"
-#else
-#define STBI_EXTERN extern
-#endif
-
-
-#ifndef _MSC_VER
-   #ifdef __cplusplus
-   #define stbi_inline inline
-   #else
-   #define stbi_inline
-   #endif
-#else
-   #define stbi_inline __forceinline
-#endif
-
-#ifndef STBI_NO_THREAD_LOCALS
-   #if defined(__cplusplus) &&  __cplusplus >= 201103L
-      #define STBI_THREAD_LOCAL       thread_local
-   #elif defined(__GNUC__) && __GNUC__ < 5
-      #define STBI_THREAD_LOCAL       __thread
-   #elif defined(_MSC_VER)
-      #define STBI_THREAD_LOCAL       __declspec(thread)
-   #elif defined (__STDC_VERSION__) && __STDC_VERSION__ >= 201112L && !defined(__STDC_NO_THREADS__)
-      #define STBI_THREAD_LOCAL       _Thread_local
-   #endif
-
-   #ifndef STBI_THREAD_LOCAL
-      #if defined(__GNUC__)
-        #define STBI_THREAD_LOCAL       __thread
-      #endif
-   #endif
-#endif
-
-#if defined(_MSC_VER) || defined(__SYMBIAN32__)
-typedef unsigned short stbi__uint16;
-typedef   signed short stbi__int16;
-typedef unsigned int   stbi__uint32;
-typedef   signed int   stbi__int32;
-#else
-#include <stdint.h>
-typedef uint16_t stbi__uint16;
-typedef int16_t  stbi__int16;
-typedef uint32_t stbi__uint32;
-typedef int32_t  stbi__int32;
-#endif
-
-// should produce compiler error if size is wrong
-typedef unsigned char validate_uint32[sizeof(stbi__uint32)==4 ? 1 : -1];
-
-#ifdef _MSC_VER
-#define STBI_NOTUSED(v)  (void)(v)
-#else
-#define STBI_NOTUSED(v)  (void)sizeof(v)
-#endif
-
-#ifdef _MSC_VER
-#define STBI_HAS_LROTL
-#endif
-
-#ifdef STBI_HAS_LROTL
-   #define stbi_lrot(x,y)  _lrotl(x,y)
-#else
-   #define stbi_lrot(x,y)  (((x) << (y)) | ((x) >> (-(y) & 31)))
-#endif
-
-#if defined(STBI_MALLOC) && defined(STBI_FREE) && (defined(STBI_REALLOC) || defined(STBI_REALLOC_SIZED))
-// ok
-#elif !defined(STBI_MALLOC) && !defined(STBI_FREE) && !defined(STBI_REALLOC) && !defined(STBI_REALLOC_SIZED)
-// ok
-#else
-#error "Must define all or none of STBI_MALLOC, STBI_FREE, and STBI_REALLOC (or STBI_REALLOC_SIZED)."
-#endif
-
-#ifndef STBI_MALLOC
-#define STBI_MALLOC(sz)           malloc(sz)
-#define STBI_REALLOC(p,newsz)     realloc(p,newsz)
-#define STBI_FREE(p)              free(p)
-#endif
-
-#ifndef STBI_REALLOC_SIZED
-#define STBI_REALLOC_SIZED(p,oldsz,newsz) STBI_REALLOC(p,newsz)
-#endif
-
-// x86/x64 detection
-#if defined(__x86_64__) || defined(_M_X64)
-#define STBI__X64_TARGET
-#elif defined(__i386) || defined(_M_IX86)
-#define STBI__X86_TARGET
-#endif
-
-#if defined(__GNUC__) && defined(STBI__X86_TARGET) && !defined(__SSE2__) && !defined(STBI_NO_SIMD)
-// gcc doesn't support sse2 intrinsics unless you compile with -msse2,
-// which in turn means it gets to use SSE2 everywhere. This is unfortunate,
-// but previous attempts to provide the SSE2 functions with runtime
-// detection caused numerous issues. The way architecture extensions are
-// exposed in GCC/Clang is, sadly, not really suited for one-file libs.
-// New behavior: if compiled with -msse2, we use SSE2 without any
-// detection; if not, we don't use it at all.
-#define STBI_NO_SIMD
-#endif
-
-#if defined(__MINGW32__) && defined(STBI__X86_TARGET) && !defined(STBI_MINGW_ENABLE_SSE2) && !defined(STBI_NO_SIMD)
-// Note that __MINGW32__ doesn't actually mean 32-bit, so we have to avoid STBI__X64_TARGET
-//
-// 32-bit MinGW wants ESP to be 16-byte aligned, but this is not in the
-// Windows ABI and VC++ as well as Windows DLLs don't maintain that invariant.
-// As a result, enabling SSE2 on 32-bit MinGW is dangerous when not
-// simultaneously enabling "-mstackrealign".
-//
-// See https://github.com/nothings/stb/issues/81 for more information.
-//
-// So default to no SSE2 on 32-bit MinGW. If you've read this far and added
-// -mstackrealign to your build settings, feel free to #define STBI_MINGW_ENABLE_SSE2.
-#define STBI_NO_SIMD
-#endif
-
-#if !defined(STBI_NO_SIMD) && (defined(STBI__X86_TARGET) || defined(STBI__X64_TARGET))
-#define STBI_SSE2
-#include <emmintrin.h>
-
-#ifdef _MSC_VER
-
-#if _MSC_VER >= 1400  // not VC6
-#include <intrin.h> // __cpuid
-static int stbi__cpuid3(void)
-{
-   int info[4];
-   __cpuid(info,1);
-   return info[3];
-}
-#else
-static int stbi__cpuid3(void)
-{
-   int res;
-   __asm {
-      mov  eax,1
-      cpuid
-      mov  res,edx
-   }
-   return res;
-}
-#endif
-
-#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void)
-{
-   int info3 = stbi__cpuid3();
-   return ((info3 >> 26) & 1) != 0;
-}
-#endif
-
-#else // assume GCC-style if not VC++
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-
-#if !defined(STBI_NO_JPEG) && defined(STBI_SSE2)
-static int stbi__sse2_available(void)
-{
-   // If we're even attempting to compile this on GCC/Clang, that means
-   // -msse2 is on, which means the compiler is allowed to use SSE2
-   // instructions at will, and so are we.
-   return 1;
-}
-#endif
-
-#endif
-#endif
-
-// ARM NEON
-#if defined(STBI_NO_SIMD) && defined(STBI_NEON)
-#undef STBI_NEON
-#endif
-
-#ifdef STBI_NEON
-#include <arm_neon.h>
-#ifdef _MSC_VER
-#define STBI_SIMD_ALIGN(type, name) __declspec(align(16)) type name
-#else
-#define STBI_SIMD_ALIGN(type, name) type name __attribute__((aligned(16)))
-#endif
-#endif
-
-#ifndef STBI_SIMD_ALIGN
-#define STBI_SIMD_ALIGN(type, name) type name
-#endif
-
-#ifndef STBI_MAX_DIMENSIONS
-#define STBI_MAX_DIMENSIONS (1 << 24)
-#endif
-
-///////////////////////////////////////////////
-//
-//  stbi__context struct and start_xxx functions
-
-// stbi__context structure is our basic context used by all images, so it
-// contains all the IO context, plus some basic image information
-typedef struct
-{
-   stbi__uint32 img_x, img_y;
-   int img_n, img_out_n;
-
-   stbi_io_callbacks io;
-   void *io_user_data;
-
-   int read_from_callbacks;
-   int buflen;
-   stbi_uc buffer_start[128];
-   int callback_already_read;
-
-   stbi_uc *img_buffer, *img_buffer_end;
-   stbi_uc *img_buffer_original, *img_buffer_original_end;
-} stbi__context;
-
-
-static void stbi__refill_buffer(stbi__context *s);
-
-// initialize a memory-decode context
-static void stbi__start_mem(stbi__context *s, stbi_uc const *buffer, int len)
-{
-   s->io.read = NULL;
-   s->read_from_callbacks = 0;
-   s->callback_already_read = 0;
-   s->img_buffer = s->img_buffer_original = (stbi_uc *) buffer;
-   s->img_buffer_end = s->img_buffer_original_end = (stbi_uc *) buffer+len;
-}
-
-// initialize a callback-based context
-static void stbi__start_callbacks(stbi__context *s, stbi_io_callbacks *c, void *user)
-{
-   s->io = *c;
-   s->io_user_data = user;
-   s->buflen = sizeof(s->buffer_start);
-   s->read_from_callbacks = 1;
-   s->callback_already_read = 0;
-   s->img_buffer = s->img_buffer_original = s->buffer_start;
-   stbi__refill_buffer(s);
-   s->img_buffer_original_end = s->img_buffer_end;
-}
-
-#ifndef STBI_NO_STDIO
-
-static int stbi__stdio_read(void *user, char *data, int size)
-{
-   return (int) fread(data,1,size,(FILE*) user);
-}
-
-static void stbi__stdio_skip(void *user, int n)
-{
-   int ch;
-   fseek((FILE*) user, n, SEEK_CUR);
-   ch = fgetc((FILE*) user);  /* have to read a byte to reset feof()'s flag */
-   if (ch != EOF) {
-      ungetc(ch, (FILE *) user);  /* push byte back onto stream if valid. */
-   }
-}
-
-static int stbi__stdio_eof(void *user)
-{
-   return feof((FILE*) user) || ferror((FILE *) user);
-}
-
-static stbi_io_callbacks stbi__stdio_callbacks =
-{
-   stbi__stdio_read,
-   stbi__stdio_skip,
-   stbi__stdio_eof,
-};
-
-static void stbi__start_file(stbi__context *s, FILE *f)
-{
-   stbi__start_callbacks(s, &stbi__stdio_callbacks, (void *) f);
-}
-
-//static void stop_file(stbi__context *s) { }
-
-#endif // !STBI_NO_STDIO
-
-static void stbi__rewind(stbi__context *s)
-{
-   // conceptually rewind SHOULD rewind to the beginning of the stream,
-   // but we just rewind to the beginning of the initial buffer, because
-   // we only use it after doing 'test', which only ever looks at at most 92 bytes
-   s->img_buffer = s->img_buffer_original;
-   s->img_buffer_end = s->img_buffer_original_end;
-}
-
-enum
-{
-   STBI_ORDER_RGB,
-   STBI_ORDER_BGR
-};
-
-typedef struct
-{
-   int bits_per_channel;
-   int num_channels;
-   int channel_order;
-} stbi__result_info;
-
-#ifndef STBI_NO_JPEG
-static int      stbi__jpeg_test(stbi__context *s);
-static void    *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PNG
-static int      stbi__png_test(stbi__context *s);
-static void    *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__png_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__png_is16(stbi__context *s);
-#endif
-
-#ifndef STBI_NO_BMP
-static int      stbi__bmp_test(stbi__context *s);
-static void    *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_TGA
-static int      stbi__tga_test(stbi__context *s);
-static void    *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__tga_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PSD
-static int      stbi__psd_test(stbi__context *s);
-static void    *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc);
-static int      stbi__psd_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__psd_is16(stbi__context *s);
-#endif
-
-#ifndef STBI_NO_HDR
-static int      stbi__hdr_test(stbi__context *s);
-static float   *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PIC
-static int      stbi__pic_test(stbi__context *s);
-static void    *stbi__pic_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__pic_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_GIF
-static int      stbi__gif_test(stbi__context *s);
-static void    *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static void    *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp);
-static int      stbi__gif_info(stbi__context *s, int *x, int *y, int *comp);
-#endif
-
-#ifndef STBI_NO_PNM
-static int      stbi__pnm_test(stbi__context *s);
-static void    *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri);
-static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp);
-static int      stbi__pnm_is16(stbi__context *s);
-#endif
-
-static
-#ifdef STBI_THREAD_LOCAL
-STBI_THREAD_LOCAL
-#endif
-const char *stbi__g_failure_reason;
-
-STBIDEF const char *stbi_failure_reason(void)
-{
-   return stbi__g_failure_reason;
-}
-
-#ifndef STBI_NO_FAILURE_STRINGS
-static int stbi__err(const char *str)
-{
-   stbi__g_failure_reason = str;
-   return 0;
-}
-#endif
-
-static void *stbi__malloc(size_t size)
-{
-    return STBI_MALLOC(size);
-}
-
-// stb_image uses ints pervasively, including for offset calculations.
-// therefore the largest decoded image size we can support with the
-// current code, even on 64-bit targets, is INT_MAX. this is not a
-// significant limitation for the intended use case.
-//
-// we do, however, need to make sure our size calculations don't
-// overflow. hence a few helper functions for size calculations that
-// multiply integers together, making sure that they're non-negative
-// and no overflow occurs.
-
-// return 1 if the sum is valid, 0 on overflow.
-// negative terms are considered invalid.
-static int stbi__addsizes_valid(int a, int b)
-{
-   if (b < 0) return 0;
-   // now 0 <= b <= INT_MAX, hence also
-   // 0 <= INT_MAX - b <= INTMAX.
-   // And "a + b <= INT_MAX" (which might overflow) is the
-   // same as a <= INT_MAX - b (no overflow)
-   return a <= INT_MAX - b;
-}
-
-// returns 1 if the product is valid, 0 on overflow.
-// negative factors are considered invalid.
-static int stbi__mul2sizes_valid(int a, int b)
-{
-   if (a < 0 || b < 0) return 0;
-   if (b == 0) return 1; // mul-by-0 is always safe
-   // portable way to check for no overflows in a*b
-   return a <= INT_MAX/b;
-}
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// returns 1 if "a*b + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad2sizes_valid(int a, int b, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__addsizes_valid(a*b, add);
-}
-#endif
-
-// returns 1 if "a*b*c + add" has no negative terms/factors and doesn't overflow
-static int stbi__mad3sizes_valid(int a, int b, int c, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
-      stbi__addsizes_valid(a*b*c, add);
-}
-
-// returns 1 if "a*b*c*d + add" has no negative terms/factors and doesn't overflow
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
-static int stbi__mad4sizes_valid(int a, int b, int c, int d, int add)
-{
-   return stbi__mul2sizes_valid(a, b) && stbi__mul2sizes_valid(a*b, c) &&
-      stbi__mul2sizes_valid(a*b*c, d) && stbi__addsizes_valid(a*b*c*d, add);
-}
-#endif
-
-#if !defined(STBI_NO_JPEG) || !defined(STBI_NO_PNG) || !defined(STBI_NO_TGA) || !defined(STBI_NO_HDR)
-// mallocs with size overflow checking
-static void *stbi__malloc_mad2(int a, int b, int add)
-{
-   if (!stbi__mad2sizes_valid(a, b, add)) return NULL;
-   return stbi__malloc(a*b + add);
-}
-#endif
-
-static void *stbi__malloc_mad3(int a, int b, int c, int add)
-{
-   if (!stbi__mad3sizes_valid(a, b, c, add)) return NULL;
-   return stbi__malloc(a*b*c + add);
-}
-
-#if !defined(STBI_NO_LINEAR) || !defined(STBI_NO_HDR) || !defined(STBI_NO_PNM)
-static void *stbi__malloc_mad4(int a, int b, int c, int d, int add)
-{
-   if (!stbi__mad4sizes_valid(a, b, c, d, add)) return NULL;
-   return stbi__malloc(a*b*c*d + add);
-}
-#endif
-
-// returns 1 if the sum of two signed ints is valid (between -2^31 and 2^31-1 inclusive), 0 on overflow.
-static int stbi__addints_valid(int a, int b)
-{
-   if ((a >= 0) != (b >= 0)) return 1; // a and b have different signs, so no overflow
-   if (a < 0 && b < 0) return a >= INT_MIN - b; // same as a + b >= INT_MIN; INT_MIN - b cannot overflow since b < 0.
-   return a <= INT_MAX - b;
-}
-
-// returns 1 if the product of two signed shorts is valid, 0 on overflow.
-static int stbi__mul2shorts_valid(short a, short b)
-{
-   if (b == 0 || b == -1) return 1; // multiplication by 0 is always 0; check for -1 so SHRT_MIN/b doesn't overflow
-   if ((a >= 0) == (b >= 0)) return a <= SHRT_MAX/b; // product is positive, so similar to mul2sizes_valid
-   if (b < 0) return a <= SHRT_MIN / b; // same as a * b >= SHRT_MIN
-   return a >= SHRT_MIN / b;
-}
-
-// stbi__err - error
-// stbi__errpf - error returning pointer to float
-// stbi__errpuc - error returning pointer to unsigned char
-
-#ifdef STBI_NO_FAILURE_STRINGS
-   #define stbi__err(x,y)  0
-#elif defined(STBI_FAILURE_USERMSG)
-   #define stbi__err(x,y)  stbi__err(y)
-#else
-   #define stbi__err(x,y)  stbi__err(x)
-#endif
-
-#define stbi__errpf(x,y)   ((float *)(size_t) (stbi__err(x,y)?NULL:NULL))
-#define stbi__errpuc(x,y)  ((unsigned char *)(size_t) (stbi__err(x,y)?NULL:NULL))
-
-STBIDEF void stbi_image_free(void *retval_from_stbi_load)
-{
-   STBI_FREE(retval_from_stbi_load);
-}
-
-#ifndef STBI_NO_LINEAR
-static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp);
-#endif
-
-#ifndef STBI_NO_HDR
-static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp);
-#endif
-
-static int stbi__vertically_flip_on_load_global = 0;
-
-STBIDEF void stbi_set_flip_vertically_on_load(int flag_true_if_should_flip)
-{
-   stbi__vertically_flip_on_load_global = flag_true_if_should_flip;
-}
-
-#ifndef STBI_THREAD_LOCAL
-#define stbi__vertically_flip_on_load  stbi__vertically_flip_on_load_global
-#else
-static STBI_THREAD_LOCAL int stbi__vertically_flip_on_load_local, stbi__vertically_flip_on_load_set;
-
-STBIDEF void stbi_set_flip_vertically_on_load_thread(int flag_true_if_should_flip)
-{
-   stbi__vertically_flip_on_load_local = flag_true_if_should_flip;
-   stbi__vertically_flip_on_load_set = 1;
-}
-
-#define stbi__vertically_flip_on_load  (stbi__vertically_flip_on_load_set       \
-                                         ? stbi__vertically_flip_on_load_local  \
-                                         : stbi__vertically_flip_on_load_global)
-#endif // STBI_THREAD_LOCAL
-
-static void *stbi__load_main(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
-{
-   memset(ri, 0, sizeof(*ri)); // make sure it's initialized if we add new fields
-   ri->bits_per_channel = 8; // default is 8 so most paths don't have to be changed
-   ri->channel_order = STBI_ORDER_RGB; // all current input & output are this, but this is here so we can add BGR order
-   ri->num_channels = 0;
-
-   // test the formats with a very explicit header first (at least a FOURCC
-   // or distinctive magic number first)
-   #ifndef STBI_NO_PNG
-   if (stbi__png_test(s))  return stbi__png_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_BMP
-   if (stbi__bmp_test(s))  return stbi__bmp_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_GIF
-   if (stbi__gif_test(s))  return stbi__gif_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_test(s))  return stbi__psd_load(s,x,y,comp,req_comp, ri, bpc);
-   #else
-   STBI_NOTUSED(bpc);
-   #endif
-   #ifndef STBI_NO_PIC
-   if (stbi__pic_test(s))  return stbi__pic_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   // then the formats that can end up attempting to load with just 1 or 2
-   // bytes matching expectations; these are prone to false positives, so
-   // try them later
-   #ifndef STBI_NO_JPEG
-   if (stbi__jpeg_test(s)) return stbi__jpeg_load(s,x,y,comp,req_comp, ri);
-   #endif
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_test(s))  return stbi__pnm_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_test(s)) {
-      float *hdr = stbi__hdr_load(s, x,y,comp,req_comp, ri);
-      return stbi__hdr_to_ldr(hdr, *x, *y, req_comp ? req_comp : *comp);
-   }
-   #endif
-
-   #ifndef STBI_NO_TGA
-   // test tga last because it's a crappy test!
-   if (stbi__tga_test(s))
-      return stbi__tga_load(s,x,y,comp,req_comp, ri);
-   #endif
-
-   return stbi__errpuc("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static stbi_uc *stbi__convert_16_to_8(stbi__uint16 *orig, int w, int h, int channels)
-{
-   int i;
-   int img_len = w * h * channels;
-   stbi_uc *reduced;
-
-   reduced = (stbi_uc *) stbi__malloc(img_len);
-   if (reduced == NULL) return stbi__errpuc("outofmem", "Out of memory");
-
-   for (i = 0; i < img_len; ++i)
-      reduced[i] = (stbi_uc)((orig[i] >> 8) & 0xFF); // top half of each byte is sufficient approx of 16->8 bit scaling
-
-   STBI_FREE(orig);
-   return reduced;
-}
-
-static stbi__uint16 *stbi__convert_8_to_16(stbi_uc *orig, int w, int h, int channels)
-{
-   int i;
-   int img_len = w * h * channels;
-   stbi__uint16 *enlarged;
-
-   enlarged = (stbi__uint16 *) stbi__malloc(img_len*2);
-   if (enlarged == NULL) return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
-
-   for (i = 0; i < img_len; ++i)
-      enlarged[i] = (stbi__uint16)((orig[i] << 8) + orig[i]); // replicate to high and low byte, maps 0->0, 255->0xffff
-
-   STBI_FREE(orig);
-   return enlarged;
-}
-
-static void stbi__vertical_flip(void *image, int w, int h, int bytes_per_pixel)
-{
-   int row;
-   size_t bytes_per_row = (size_t)w * bytes_per_pixel;
-   stbi_uc temp[2048];
-   stbi_uc *bytes = (stbi_uc *)image;
-
-   for (row = 0; row < (h>>1); row++) {
-      stbi_uc *row0 = bytes + row*bytes_per_row;
-      stbi_uc *row1 = bytes + (h - row - 1)*bytes_per_row;
-      // swap row0 with row1
-      size_t bytes_left = bytes_per_row;
-      while (bytes_left) {
-         size_t bytes_copy = (bytes_left < sizeof(temp)) ? bytes_left : sizeof(temp);
-         memcpy(temp, row0, bytes_copy);
-         memcpy(row0, row1, bytes_copy);
-         memcpy(row1, temp, bytes_copy);
-         row0 += bytes_copy;
-         row1 += bytes_copy;
-         bytes_left -= bytes_copy;
-      }
-   }
-}
-
-#ifndef STBI_NO_GIF
-static void stbi__vertical_flip_slices(void *image, int w, int h, int z, int bytes_per_pixel)
-{
-   int slice;
-   int slice_size = w * h * bytes_per_pixel;
-
-   stbi_uc *bytes = (stbi_uc *)image;
-   for (slice = 0; slice < z; ++slice) {
-      stbi__vertical_flip(bytes, w, h, bytes_per_pixel);
-      bytes += slice_size;
-   }
-}
-#endif
-
-static unsigned char *stbi__load_and_postprocess_8bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__result_info ri;
-   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 8);
-
-   if (result == NULL)
-      return NULL;
-
-   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
-   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
-
-   if (ri.bits_per_channel != 8) {
-      result = stbi__convert_16_to_8((stbi__uint16 *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
-      ri.bits_per_channel = 8;
-   }
-
-   // @TODO: move stbi__convert_format to here
-
-   if (stbi__vertically_flip_on_load) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi_uc));
-   }
-
-   return (unsigned char *) result;
-}
-
-static stbi__uint16 *stbi__load_and_postprocess_16bit(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__result_info ri;
-   void *result = stbi__load_main(s, x, y, comp, req_comp, &ri, 16);
-
-   if (result == NULL)
-      return NULL;
-
-   // it is the responsibility of the loaders to make sure we get either 8 or 16 bit.
-   STBI_ASSERT(ri.bits_per_channel == 8 || ri.bits_per_channel == 16);
-
-   if (ri.bits_per_channel != 16) {
-      result = stbi__convert_8_to_16((stbi_uc *) result, *x, *y, req_comp == 0 ? *comp : req_comp);
-      ri.bits_per_channel = 16;
-   }
-
-   // @TODO: move stbi__convert_format16 to here
-   // @TODO: special case RGB-to-Y (and RGBA-to-YA) for 8-bit-to-16-bit case to keep more precision
-
-   if (stbi__vertically_flip_on_load) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(stbi__uint16));
-   }
-
-   return (stbi__uint16 *) result;
-}
-
-#if !defined(STBI_NO_HDR) && !defined(STBI_NO_LINEAR)
-static void stbi__float_postprocess(float *result, int *x, int *y, int *comp, int req_comp)
-{
-   if (stbi__vertically_flip_on_load && result != NULL) {
-      int channels = req_comp ? req_comp : *comp;
-      stbi__vertical_flip(result, *x, *y, channels * sizeof(float));
-   }
-}
-#endif
-
-#ifndef STBI_NO_STDIO
-
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-STBI_EXTERN __declspec(dllimport) int __stdcall MultiByteToWideChar(unsigned int cp, unsigned long flags, const char *str, int cbmb, wchar_t *widestr, int cchwide);
-STBI_EXTERN __declspec(dllimport) int __stdcall WideCharToMultiByte(unsigned int cp, unsigned long flags, const wchar_t *widestr, int cchwide, char *str, int cbmb, const char *defchar, int *used_default);
-#endif
-
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-STBIDEF int stbi_convert_wchar_to_utf8(char *buffer, size_t bufferlen, const wchar_t* input)
-{
-	return WideCharToMultiByte(65001 /* UTF8 */, 0, input, -1, buffer, (int) bufferlen, NULL, NULL);
-}
-#endif
-
-static FILE *stbi__fopen(char const *filename, char const *mode)
-{
-   FILE *f;
-#if defined(_WIN32) && defined(STBI_WINDOWS_UTF8)
-   wchar_t wMode[64];
-   wchar_t wFilename[1024];
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, filename, -1, wFilename, sizeof(wFilename)/sizeof(*wFilename)))
-      return 0;
-
-	if (0 == MultiByteToWideChar(65001 /* UTF8 */, 0, mode, -1, wMode, sizeof(wMode)/sizeof(*wMode)))
-      return 0;
-
-#if defined(_MSC_VER) && _MSC_VER >= 1400
-	if (0 != _wfopen_s(&f, wFilename, wMode))
-		f = 0;
-#else
-   f = _wfopen(wFilename, wMode);
-#endif
-
-#elif defined(_MSC_VER) && _MSC_VER >= 1400
-   if (0 != fopen_s(&f, filename, mode))
-      f=0;
-#else
-   f = fopen(filename, mode);
-#endif
-   return f;
-}
-
-
-STBIDEF stbi_uc *stbi_load(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   unsigned char *result;
-   if (!f) return stbi__errpuc("can't fopen", "Unable to open file");
-   result = stbi_load_from_file(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-STBIDEF stbi_uc *stbi_load_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   unsigned char *result;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   result = stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-   if (result) {
-      // need to 'unget' all the characters in the IO buffer
-      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
-   }
-   return result;
-}
-
-STBIDEF stbi__uint16 *stbi_load_from_file_16(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__uint16 *result;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   result = stbi__load_and_postprocess_16bit(&s,x,y,comp,req_comp);
-   if (result) {
-      // need to 'unget' all the characters in the IO buffer
-      fseek(f, - (int) (s.img_buffer_end - s.img_buffer), SEEK_CUR);
-   }
-   return result;
-}
-
-STBIDEF stbi_us *stbi_load_16(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   stbi__uint16 *result;
-   if (!f) return (stbi_us *) stbi__errpuc("can't fopen", "Unable to open file");
-   result = stbi_load_from_file_16(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-
-#endif //!STBI_NO_STDIO
-
-STBIDEF stbi_us *stbi_load_16_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *channels_in_file, int desired_channels)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
-}
-
-STBIDEF stbi_us *stbi_load_16_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *channels_in_file, int desired_channels)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *)clbk, user);
-   return stbi__load_and_postprocess_16bit(&s,x,y,channels_in_file,desired_channels);
-}
-
-STBIDEF stbi_uc *stbi_load_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-}
-
-STBIDEF stbi_uc *stbi_load_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__load_and_postprocess_8bit(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_GIF
-STBIDEF stbi_uc *stbi_load_gif_from_memory(stbi_uc const *buffer, int len, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
-{
-   unsigned char *result;
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-
-   result = (unsigned char*) stbi__load_gif_main(&s, delays, x, y, z, comp, req_comp);
-   if (stbi__vertically_flip_on_load) {
-      stbi__vertical_flip_slices( result, *x, *y, *z, *comp );
-   }
-
-   return result;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float *stbi__loadf_main(stbi__context *s, int *x, int *y, int *comp, int req_comp)
-{
-   unsigned char *data;
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_test(s)) {
-      stbi__result_info ri;
-      float *hdr_data = stbi__hdr_load(s,x,y,comp,req_comp, &ri);
-      if (hdr_data)
-         stbi__float_postprocess(hdr_data,x,y,comp,req_comp);
-      return hdr_data;
-   }
-   #endif
-   data = stbi__load_and_postprocess_8bit(s, x, y, comp, req_comp);
-   if (data)
-      return stbi__ldr_to_hdr(data, *x, *y, req_comp ? req_comp : *comp);
-   return stbi__errpf("unknown image type", "Image not of any known type, or corrupt");
-}
-
-STBIDEF float *stbi_loadf_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-
-STBIDEF float *stbi_loadf_from_callbacks(stbi_io_callbacks const *clbk, void *user, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF float *stbi_loadf(char const *filename, int *x, int *y, int *comp, int req_comp)
-{
-   float *result;
-   FILE *f = stbi__fopen(filename, "rb");
-   if (!f) return stbi__errpf("can't fopen", "Unable to open file");
-   result = stbi_loadf_from_file(f,x,y,comp,req_comp);
-   fclose(f);
-   return result;
-}
-
-STBIDEF float *stbi_loadf_from_file(FILE *f, int *x, int *y, int *comp, int req_comp)
-{
-   stbi__context s;
-   stbi__start_file(&s,f);
-   return stbi__loadf_main(&s,x,y,comp,req_comp);
-}
-#endif // !STBI_NO_STDIO
-
-#endif // !STBI_NO_LINEAR
-
-// these is-hdr-or-not is defined independent of whether STBI_NO_LINEAR is
-// defined, for API simplicity; if STBI_NO_LINEAR is defined, it always
-// reports false!
-
-STBIDEF int stbi_is_hdr_from_memory(stbi_uc const *buffer, int len)
-{
-   #ifndef STBI_NO_HDR
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__hdr_test(&s);
-   #else
-   STBI_NOTUSED(buffer);
-   STBI_NOTUSED(len);
-   return 0;
-   #endif
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int      stbi_is_hdr          (char const *filename)
-{
-   FILE *f = stbi__fopen(filename, "rb");
-   int result=0;
-   if (f) {
-      result = stbi_is_hdr_from_file(f);
-      fclose(f);
-   }
-   return result;
-}
-
-STBIDEF int stbi_is_hdr_from_file(FILE *f)
-{
-   #ifndef STBI_NO_HDR
-   long pos = ftell(f);
-   int res;
-   stbi__context s;
-   stbi__start_file(&s,f);
-   res = stbi__hdr_test(&s);
-   fseek(f, pos, SEEK_SET);
-   return res;
-   #else
-   STBI_NOTUSED(f);
-   return 0;
-   #endif
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int      stbi_is_hdr_from_callbacks(stbi_io_callbacks const *clbk, void *user)
-{
-   #ifndef STBI_NO_HDR
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) clbk, user);
-   return stbi__hdr_test(&s);
-   #else
-   STBI_NOTUSED(clbk);
-   STBI_NOTUSED(user);
-   return 0;
-   #endif
-}
-
-#ifndef STBI_NO_LINEAR
-static float stbi__l2h_gamma=2.2f, stbi__l2h_scale=1.0f;
-
-STBIDEF void   stbi_ldr_to_hdr_gamma(float gamma) { stbi__l2h_gamma = gamma; }
-STBIDEF void   stbi_ldr_to_hdr_scale(float scale) { stbi__l2h_scale = scale; }
-#endif
-
-static float stbi__h2l_gamma_i=1.0f/2.2f, stbi__h2l_scale_i=1.0f;
-
-STBIDEF void   stbi_hdr_to_ldr_gamma(float gamma) { stbi__h2l_gamma_i = 1/gamma; }
-STBIDEF void   stbi_hdr_to_ldr_scale(float scale) { stbi__h2l_scale_i = 1/scale; }
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Common code used by all image loaders
-//
-
-enum
-{
-   STBI__SCAN_load=0,
-   STBI__SCAN_type,
-   STBI__SCAN_header
-};
-
-static void stbi__refill_buffer(stbi__context *s)
-{
-   int n = (s->io.read)(s->io_user_data,(char*)s->buffer_start,s->buflen);
-   s->callback_already_read += (int) (s->img_buffer - s->img_buffer_original);
-   if (n == 0) {
-      // at end of file, treat same as if from memory, but need to handle case
-      // where s->img_buffer isn't pointing to safe memory, e.g. 0-byte file
-      s->read_from_callbacks = 0;
-      s->img_buffer = s->buffer_start;
-      s->img_buffer_end = s->buffer_start+1;
-      *s->img_buffer = 0;
-   } else {
-      s->img_buffer = s->buffer_start;
-      s->img_buffer_end = s->buffer_start + n;
-   }
-}
-
-stbi_inline static stbi_uc stbi__get8(stbi__context *s)
-{
-   if (s->img_buffer < s->img_buffer_end)
-      return *s->img_buffer++;
-   if (s->read_from_callbacks) {
-      stbi__refill_buffer(s);
-      return *s->img_buffer++;
-   }
-   return 0;
-}
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_HDR) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-stbi_inline static int stbi__at_eof(stbi__context *s)
-{
-   if (s->io.read) {
-      if (!(s->io.eof)(s->io_user_data)) return 0;
-      // if feof() is true, check if buffer = end
-      // special case: we've only got the special 0 character at the end
-      if (s->read_from_callbacks == 0) return 1;
-   }
-
-   return s->img_buffer >= s->img_buffer_end;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC)
-// nothing
-#else
-static void stbi__skip(stbi__context *s, int n)
-{
-   if (n == 0) return;  // already there!
-   if (n < 0) {
-      s->img_buffer = s->img_buffer_end;
-      return;
-   }
-   if (s->io.read) {
-      int blen = (int) (s->img_buffer_end - s->img_buffer);
-      if (blen < n) {
-         s->img_buffer = s->img_buffer_end;
-         (s->io.skip)(s->io_user_data, n - blen);
-         return;
-      }
-   }
-   s->img_buffer += n;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_TGA) && defined(STBI_NO_HDR) && defined(STBI_NO_PNM)
-// nothing
-#else
-static int stbi__getn(stbi__context *s, stbi_uc *buffer, int n)
-{
-   if (s->io.read) {
-      int blen = (int) (s->img_buffer_end - s->img_buffer);
-      if (blen < n) {
-         int res, count;
-
-         memcpy(buffer, s->img_buffer, blen);
-
-         count = (s->io.read)(s->io_user_data, (char*) buffer + blen, n - blen);
-         res = (count == (n-blen));
-         s->img_buffer = s->img_buffer_end;
-         return res;
-      }
-   }
-
-   if (s->img_buffer+n <= s->img_buffer_end) {
-      memcpy(buffer, s->img_buffer, n);
-      s->img_buffer += n;
-      return 1;
-   } else
-      return 0;
-}
-#endif
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static int stbi__get16be(stbi__context *s)
-{
-   int z = stbi__get8(s);
-   return (z << 8) + stbi__get8(s);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD) && defined(STBI_NO_PIC)
-// nothing
-#else
-static stbi__uint32 stbi__get32be(stbi__context *s)
-{
-   stbi__uint32 z = stbi__get16be(s);
-   return (z << 16) + stbi__get16be(s);
-}
-#endif
-
-#if defined(STBI_NO_BMP) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF)
-// nothing
-#else
-static int stbi__get16le(stbi__context *s)
-{
-   int z = stbi__get8(s);
-   return z + (stbi__get8(s) << 8);
-}
-#endif
-
-#ifndef STBI_NO_BMP
-static stbi__uint32 stbi__get32le(stbi__context *s)
-{
-   stbi__uint32 z = stbi__get16le(s);
-   z += (stbi__uint32)stbi__get16le(s) << 16;
-   return z;
-}
-#endif
-
-#define STBI__BYTECAST(x)  ((stbi_uc) ((x) & 255))  // truncate int to byte without warnings
-
-#if defined(STBI_NO_JPEG) && defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-//////////////////////////////////////////////////////////////////////////////
-//
-//  generic converter from built-in img_n to req_comp
-//    individual types do this automatically as much as possible (e.g. jpeg
-//    does all cases internally since it needs to colorspace convert anyway,
-//    and it never has alpha, so very few cases ). png can automatically
-//    interleave an alpha=255 channel, but falls back to this for other cases
-//
-//  assume data buffer is malloced, so malloc a new one and free that one
-//  only failure mode is malloc failing
-
-static stbi_uc stbi__compute_y(int r, int g, int b)
-{
-   return (stbi_uc) (((r*77) + (g*150) +  (29*b)) >> 8);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_BMP) && defined(STBI_NO_PSD) && defined(STBI_NO_TGA) && defined(STBI_NO_GIF) && defined(STBI_NO_PIC) && defined(STBI_NO_PNM)
-// nothing
-#else
-static unsigned char *stbi__convert_format(unsigned char *data, int img_n, int req_comp, unsigned int x, unsigned int y)
-{
-   int i,j;
-   unsigned char *good;
-
-   if (req_comp == img_n) return data;
-   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-   good = (unsigned char *) stbi__malloc_mad3(req_comp, x, y, 0);
-   if (good == NULL) {
-      STBI_FREE(data);
-      return stbi__errpuc("outofmem", "Out of memory");
-   }
-
-   for (j=0; j < (int) y; ++j) {
-      unsigned char *src  = data + j * x * img_n   ;
-      unsigned char *dest = good + j * x * req_comp;
-
-      #define STBI__COMBO(a,b)  ((a)*8+(b))
-      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
-      // convert source image with img_n components to one with req_comp components;
-      // avoid switch per pixel, so use switch per scanline and massive macros
-      switch (STBI__COMBO(img_n, req_comp)) {
-         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=255;                                     } break;
-         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
-         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=255;                     } break;
-         STBI__CASE(2,1) { dest[0]=src[0];                                                  } break;
-         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                  } break;
-         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                  } break;
-         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=255;        } break;
-         STBI__CASE(3,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(3,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = 255;    } break;
-         STBI__CASE(4,1) { dest[0]=stbi__compute_y(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(4,2) { dest[0]=stbi__compute_y(src[0],src[1],src[2]); dest[1] = src[3]; } break;
-         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                    } break;
-         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return stbi__errpuc("unsupported", "Unsupported format conversion");
-      }
-      #undef STBI__CASE
-   }
-
-   STBI_FREE(data);
-   return good;
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16 stbi__compute_y_16(int r, int g, int b)
-{
-   return (stbi__uint16) (((r*77) + (g*150) +  (29*b)) >> 8);
-}
-#endif
-
-#if defined(STBI_NO_PNG) && defined(STBI_NO_PSD)
-// nothing
-#else
-static stbi__uint16 *stbi__convert_format16(stbi__uint16 *data, int img_n, int req_comp, unsigned int x, unsigned int y)
-{
-   int i,j;
-   stbi__uint16 *good;
-
-   if (req_comp == img_n) return data;
-   STBI_ASSERT(req_comp >= 1 && req_comp <= 4);
-
-   good = (stbi__uint16 *) stbi__malloc(req_comp * x * y * 2);
-   if (good == NULL) {
-      STBI_FREE(data);
-      return (stbi__uint16 *) stbi__errpuc("outofmem", "Out of memory");
-   }
-
-   for (j=0; j < (int) y; ++j) {
-      stbi__uint16 *src  = data + j * x * img_n   ;
-      stbi__uint16 *dest = good + j * x * req_comp;
-
-      #define STBI__COMBO(a,b)  ((a)*8+(b))
-      #define STBI__CASE(a,b)   case STBI__COMBO(a,b): for(i=x-1; i >= 0; --i, src += a, dest += b)
-      // convert source image with img_n components to one with req_comp components;
-      // avoid switch per pixel, so use switch per scanline and massive macros
-      switch (STBI__COMBO(img_n, req_comp)) {
-         STBI__CASE(1,2) { dest[0]=src[0]; dest[1]=0xffff;                                     } break;
-         STBI__CASE(1,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
-         STBI__CASE(1,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=0xffff;                     } break;
-         STBI__CASE(2,1) { dest[0]=src[0];                                                     } break;
-         STBI__CASE(2,3) { dest[0]=dest[1]=dest[2]=src[0];                                     } break;
-         STBI__CASE(2,4) { dest[0]=dest[1]=dest[2]=src[0]; dest[3]=src[1];                     } break;
-         STBI__CASE(3,4) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];dest[3]=0xffff;        } break;
-         STBI__CASE(3,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(3,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = 0xffff; } break;
-         STBI__CASE(4,1) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]);                   } break;
-         STBI__CASE(4,2) { dest[0]=stbi__compute_y_16(src[0],src[1],src[2]); dest[1] = src[3]; } break;
-         STBI__CASE(4,3) { dest[0]=src[0];dest[1]=src[1];dest[2]=src[2];                       } break;
-         default: STBI_ASSERT(0); STBI_FREE(data); STBI_FREE(good); return (stbi__uint16*) stbi__errpuc("unsupported", "Unsupported format conversion");
-      }
-      #undef STBI__CASE
-   }
-
-   STBI_FREE(data);
-   return good;
-}
-#endif
-
-#ifndef STBI_NO_LINEAR
-static float   *stbi__ldr_to_hdr(stbi_uc *data, int x, int y, int comp)
-{
-   int i,k,n;
-   float *output;
-   if (!data) return NULL;
-   output = (float *) stbi__malloc_mad4(x, y, comp, sizeof(float), 0);
-   if (output == NULL) { STBI_FREE(data); return stbi__errpf("outofmem", "Out of memory"); }
-   // compute number of non-alpha components
-   if (comp & 1) n = comp; else n = comp-1;
-   for (i=0; i < x*y; ++i) {
-      for (k=0; k < n; ++k) {
-         output[i*comp + k] = (float) (pow(data[i*comp+k]/255.0f, stbi__l2h_gamma) * stbi__l2h_scale);
-      }
-   }
-   if (n < comp) {
-      for (i=0; i < x*y; ++i) {
-         output[i*comp + n] = data[i*comp + n]/255.0f;
-      }
-   }
-   STBI_FREE(data);
-   return output;
-}
-#endif
-
-#ifndef STBI_NO_HDR
-#define stbi__float2int(x)   ((int) (x))
-static stbi_uc *stbi__hdr_to_ldr(float   *data, int x, int y, int comp)
-{
-   int i,k,n;
-   stbi_uc *output;
-   if (!data) return NULL;
-   output = (stbi_uc *) stbi__malloc_mad3(x, y, comp, 0);
-   if (output == NULL) { STBI_FREE(data); return stbi__errpuc("outofmem", "Out of memory"); }
-   // compute number of non-alpha components
-   if (comp & 1) n = comp; else n = comp-1;
-   for (i=0; i < x*y; ++i) {
-      for (k=0; k < n; ++k) {
-         float z = (float) pow(data[i*comp+k]*stbi__h2l_scale_i, stbi__h2l_gamma_i) * 255 + 0.5f;
-         if (z < 0) z = 0;
-         if (z > 255) z = 255;
-         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
-      }
-      if (k < comp) {
-         float z = data[i*comp+k] * 255 + 0.5f;
-         if (z < 0) z = 0;
-         if (z > 255) z = 255;
-         output[i*comp + k] = (stbi_uc) stbi__float2int(z);
-      }
-   }
-   STBI_FREE(data);
-   return output;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-//  "baseline" JPEG/JFIF decoder
-//
-//    simple implementation
-//      - doesn't support delayed output of y-dimension
-//      - simple interface (only one output format: 8-bit interleaved RGB)
-//      - doesn't try to recover corrupt jpegs
-//      - doesn't allow partial loading, loading multiple at once
-//      - still fast on x86 (copying globals into locals doesn't help x86)
-//      - allocates lots of intermediate memory (full size of all components)
-//        - non-interleaved case requires this anyway
-//        - allows good upsampling (see next)
-//    high-quality
-//      - upsampled channels are bilinearly interpolated, even across blocks
-//      - quality integer IDCT derived from IJG's 'slow'
-//    performance
-//      - fast huffman; reasonable integer IDCT
-//      - some SIMD kernels for common paths on targets with SSE2/NEON
-//      - uses a lot of intermediate memory, could cache poorly
-
-#ifndef STBI_NO_JPEG
-
-// huffman decoding acceleration
-#define FAST_BITS   9  // larger handles more cases; smaller stomps less cache
-
-typedef struct
-{
-   stbi_uc  fast[1 << FAST_BITS];
-   // weirdly, repacking this into AoS is a 10% speed loss, instead of a win
-   stbi__uint16 code[256];
-   stbi_uc  values[256];
-   stbi_uc  size[257];
-   unsigned int maxcode[18];
-   int    delta[17];   // old 'firstsymbol' - old 'firstcode'
-} stbi__huffman;
-
-typedef struct
-{
-   stbi__context *s;
-   stbi__huffman huff_dc[4];
-   stbi__huffman huff_ac[4];
-   stbi__uint16 dequant[4][64];
-   stbi__int16 fast_ac[4][1 << FAST_BITS];
-
-// sizes for components, interleaved MCUs
-   int img_h_max, img_v_max;
-   int img_mcu_x, img_mcu_y;
-   int img_mcu_w, img_mcu_h;
-
-// definition of jpeg image component
-   struct
-   {
-      int id;
-      int h,v;
-      int tq;
-      int hd,ha;
-      int dc_pred;
-
-      int x,y,w2,h2;
-      stbi_uc *data;
-      void *raw_data, *raw_coeff;
-      stbi_uc *linebuf;
-      short   *coeff;   // progressive only
-      int      coeff_w, coeff_h; // number of 8x8 coefficient blocks
-   } img_comp[4];
-
-   stbi__uint32   code_buffer; // jpeg entropy-coded buffer
-   int            code_bits;   // number of valid bits
-   unsigned char  marker;      // marker seen while filling entropy buffer
-   int            nomore;      // flag if we saw a marker so must stop
-
-   int            progressive;
-   int            spec_start;
-   int            spec_end;
-   int            succ_high;
-   int            succ_low;
-   int            eob_run;
-   int            jfif;
-   int            app14_color_transform; // Adobe APP14 tag
-   int            rgb;
-
-   int scan_n, order[4];
-   int restart_interval, todo;
-
-// kernels
-   void (*idct_block_kernel)(stbi_uc *out, int out_stride, short data[64]);
-   void (*YCbCr_to_RGB_kernel)(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step);
-   stbi_uc *(*resample_row_hv_2_kernel)(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs);
-} stbi__jpeg;
-
-static int stbi__build_huffman(stbi__huffman *h, int *count)
-{
-   int i,j,k=0;
-   unsigned int code;
-   // build size list for each symbol (from JPEG spec)
-   for (i=0; i < 16; ++i) {
-      for (j=0; j < count[i]; ++j) {
-         h->size[k++] = (stbi_uc) (i+1);
-         if(k >= 257) return stbi__err("bad size list","Corrupt JPEG");
-      }
-   }
-   h->size[k] = 0;
-
-   // compute actual symbols (from jpeg spec)
-   code = 0;
-   k = 0;
-   for(j=1; j <= 16; ++j) {
-      // compute delta to add to code to compute symbol id
-      h->delta[j] = k - code;
-      if (h->size[k] == j) {
-         while (h->size[k] == j)
-            h->code[k++] = (stbi__uint16) (code++);
-         if (code-1 >= (1u << j)) return stbi__err("bad code lengths","Corrupt JPEG");
-      }
-      // compute largest code + 1 for this size, preshifted as needed later
-      h->maxcode[j] = code << (16-j);
-      code <<= 1;
-   }
-   h->maxcode[j] = 0xffffffff;
-
-   // build non-spec acceleration table; 255 is flag for not-accelerated
-   memset(h->fast, 255, 1 << FAST_BITS);
-   for (i=0; i < k; ++i) {
-      int s = h->size[i];
-      if (s <= FAST_BITS) {
-         int c = h->code[i] << (FAST_BITS-s);
-         int m = 1 << (FAST_BITS-s);
-         for (j=0; j < m; ++j) {
-            h->fast[c+j] = (stbi_uc) i;
-         }
-      }
-   }
-   return 1;
-}
-
-// build a table that decodes both magnitude and value of small ACs in
-// one go.
-static void stbi__build_fast_ac(stbi__int16 *fast_ac, stbi__huffman *h)
-{
-   int i;
-   for (i=0; i < (1 << FAST_BITS); ++i) {
-      stbi_uc fast = h->fast[i];
-      fast_ac[i] = 0;
-      if (fast < 255) {
-         int rs = h->values[fast];
-         int run = (rs >> 4) & 15;
-         int magbits = rs & 15;
-         int len = h->size[fast];
-
-         if (magbits && len + magbits <= FAST_BITS) {
-            // magnitude code followed by receive_extend code
-            int k = ((i << len) & ((1 << FAST_BITS) - 1)) >> (FAST_BITS - magbits);
-            int m = 1 << (magbits - 1);
-            if (k < m) k += (~0U << magbits) + 1;
-            // if the result is small enough, we can fit it in fast_ac table
-            if (k >= -128 && k <= 127)
-               fast_ac[i] = (stbi__int16) ((k * 256) + (run * 16) + (len + magbits));
-         }
-      }
-   }
-}
-
-static void stbi__grow_buffer_unsafe(stbi__jpeg *j)
-{
-   do {
-      unsigned int b = j->nomore ? 0 : stbi__get8(j->s);
-      if (b == 0xff) {
-         int c = stbi__get8(j->s);
-         while (c == 0xff) c = stbi__get8(j->s); // consume fill bytes
-         if (c != 0) {
-            j->marker = (unsigned char) c;
-            j->nomore = 1;
-            return;
-         }
-      }
-      j->code_buffer |= b << (24 - j->code_bits);
-      j->code_bits += 8;
-   } while (j->code_bits <= 24);
-}
-
-// (1 << n) - 1
-static const stbi__uint32 stbi__bmask[17]={0,1,3,7,15,31,63,127,255,511,1023,2047,4095,8191,16383,32767,65535};
-
-// decode a jpeg huffman value from the bitstream
-stbi_inline static int stbi__jpeg_huff_decode(stbi__jpeg *j, stbi__huffman *h)
-{
-   unsigned int temp;
-   int c,k;
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-
-   // look at the top FAST_BITS and determine what symbol ID it is,
-   // if the code is <= FAST_BITS
-   c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-   k = h->fast[c];
-   if (k < 255) {
-      int s = h->size[k];
-      if (s > j->code_bits)
-         return -1;
-      j->code_buffer <<= s;
-      j->code_bits -= s;
-      return h->values[k];
-   }
-
-   // naive test is to shift the code_buffer down so k bits are
-   // valid, then test against maxcode. To speed this up, we've
-   // preshifted maxcode left so that it has (16-k) 0s at the
-   // end; in other words, regardless of the number of bits, it
-   // wants to be compared against something shifted to have 16;
-   // that way we don't need to shift inside the loop.
-   temp = j->code_buffer >> 16;
-   for (k=FAST_BITS+1 ; ; ++k)
-      if (temp < h->maxcode[k])
-         break;
-   if (k == 17) {
-      // error! code not found
-      j->code_bits -= 16;
-      return -1;
-   }
-
-   if (k > j->code_bits)
-      return -1;
-
-   // convert the huffman code to the symbol id
-   c = ((j->code_buffer >> (32 - k)) & stbi__bmask[k]) + h->delta[k];
-   if(c < 0 || c >= 256) // symbol id out of bounds!
-       return -1;
-   STBI_ASSERT((((j->code_buffer) >> (32 - h->size[c])) & stbi__bmask[h->size[c]]) == h->code[c]);
-
-   // convert the id to a symbol
-   j->code_bits -= k;
-   j->code_buffer <<= k;
-   return h->values[c];
-}
-
-// bias[n] = (-1<<n) + 1
-static const int stbi__jbias[16] = {0,-1,-3,-7,-15,-31,-63,-127,-255,-511,-1023,-2047,-4095,-8191,-16383,-32767};
-
-// combined JPEG 'receive' and JPEG 'extend', since baseline
-// always extends everything it receives.
-stbi_inline static int stbi__extend_receive(stbi__jpeg *j, int n)
-{
-   unsigned int k;
-   int sgn;
-   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
-
-   sgn = j->code_buffer >> 31; // sign bit always in MSB; 0 if MSB clear (positive), 1 if MSB set (negative)
-   k = stbi_lrot(j->code_buffer, n);
-   j->code_buffer = k & ~stbi__bmask[n];
-   k &= stbi__bmask[n];
-   j->code_bits -= n;
-   return k + (stbi__jbias[n] & (sgn - 1));
-}
-
-// get some unsigned bits
-stbi_inline static int stbi__jpeg_get_bits(stbi__jpeg *j, int n)
-{
-   unsigned int k;
-   if (j->code_bits < n) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < n) return 0; // ran out of bits from stream, return 0s intead of continuing
-   k = stbi_lrot(j->code_buffer, n);
-   j->code_buffer = k & ~stbi__bmask[n];
-   k &= stbi__bmask[n];
-   j->code_bits -= n;
-   return k;
-}
-
-stbi_inline static int stbi__jpeg_get_bit(stbi__jpeg *j)
-{
-   unsigned int k;
-   if (j->code_bits < 1) stbi__grow_buffer_unsafe(j);
-   if (j->code_bits < 1) return 0; // ran out of bits from stream, return 0s intead of continuing
-   k = j->code_buffer;
-   j->code_buffer <<= 1;
-   --j->code_bits;
-   return k & 0x80000000;
-}
-
-// given a value that's at position X in the zigzag stream,
-// where does it appear in the 8x8 matrix coded as row-major?
-static const stbi_uc stbi__jpeg_dezigzag[64+15] =
-{
-    0,  1,  8, 16,  9,  2,  3, 10,
-   17, 24, 32, 25, 18, 11,  4,  5,
-   12, 19, 26, 33, 40, 48, 41, 34,
-   27, 20, 13,  6,  7, 14, 21, 28,
-   35, 42, 49, 56, 57, 50, 43, 36,
-   29, 22, 15, 23, 30, 37, 44, 51,
-   58, 59, 52, 45, 38, 31, 39, 46,
-   53, 60, 61, 54, 47, 55, 62, 63,
-   // let corrupt input sample past end
-   63, 63, 63, 63, 63, 63, 63, 63,
-   63, 63, 63, 63, 63, 63, 63
-};
-
-// decode one 64-entry block--
-static int stbi__jpeg_decode_block(stbi__jpeg *j, short data[64], stbi__huffman *hdc, stbi__huffman *hac, stbi__int16 *fac, int b, stbi__uint16 *dequant)
-{
-   int diff,dc,k;
-   int t;
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-   t = stbi__jpeg_huff_decode(j, hdc);
-   if (t < 0 || t > 15) return stbi__err("bad huffman code","Corrupt JPEG");
-
-   // 0 all the ac values now so we can do it 32-bits at a time
-   memset(data,0,64*sizeof(data[0]));
-
-   diff = t ? stbi__extend_receive(j, t) : 0;
-   if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta","Corrupt JPEG");
-   dc = j->img_comp[b].dc_pred + diff;
-   j->img_comp[b].dc_pred = dc;
-   if (!stbi__mul2shorts_valid(dc, dequant[0])) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-   data[0] = (short) (dc * dequant[0]);
-
-   // decode AC components, see JPEG spec
-   k = 1;
-   do {
-      unsigned int zig;
-      int c,r,s;
-      if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-      c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-      r = fac[c];
-      if (r) { // fast-AC path
-         k += (r >> 4) & 15; // run
-         s = r & 15; // combined length
-         if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
-         j->code_buffer <<= s;
-         j->code_bits -= s;
-         // decode into unzigzag'd location
-         zig = stbi__jpeg_dezigzag[k++];
-         data[zig] = (short) ((r >> 8) * dequant[zig]);
-      } else {
-         int rs = stbi__jpeg_huff_decode(j, hac);
-         if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-         s = rs & 15;
-         r = rs >> 4;
-         if (s == 0) {
-            if (rs != 0xf0) break; // end block
-            k += 16;
-         } else {
-            k += r;
-            // decode into unzigzag'd location
-            zig = stbi__jpeg_dezigzag[k++];
-            data[zig] = (short) (stbi__extend_receive(j,s) * dequant[zig]);
-         }
-      }
-   } while (k < 64);
-   return 1;
-}
-
-static int stbi__jpeg_decode_block_prog_dc(stbi__jpeg *j, short data[64], stbi__huffman *hdc, int b)
-{
-   int diff,dc;
-   int t;
-   if (j->spec_end != 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-   if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-
-   if (j->succ_high == 0) {
-      // first scan for DC coefficient, must be first
-      memset(data,0,64*sizeof(data[0])); // 0 all the ac values now
-      t = stbi__jpeg_huff_decode(j, hdc);
-      if (t < 0 || t > 15) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-      diff = t ? stbi__extend_receive(j, t) : 0;
-
-      if (!stbi__addints_valid(j->img_comp[b].dc_pred, diff)) return stbi__err("bad delta", "Corrupt JPEG");
-      dc = j->img_comp[b].dc_pred + diff;
-      j->img_comp[b].dc_pred = dc;
-      if (!stbi__mul2shorts_valid(dc, 1 << j->succ_low)) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-      data[0] = (short) (dc * (1 << j->succ_low));
-   } else {
-      // refinement scan for DC coefficient
-      if (stbi__jpeg_get_bit(j))
-         data[0] += (short) (1 << j->succ_low);
-   }
-   return 1;
-}
-
-// @OPTIMIZE: store non-zigzagged during the decode passes,
-// and only de-zigzag when dequantizing
-static int stbi__jpeg_decode_block_prog_ac(stbi__jpeg *j, short data[64], stbi__huffman *hac, stbi__int16 *fac)
-{
-   int k;
-   if (j->spec_start == 0) return stbi__err("can't merge dc and ac", "Corrupt JPEG");
-
-   if (j->succ_high == 0) {
-      int shift = j->succ_low;
-
-      if (j->eob_run) {
-         --j->eob_run;
-         return 1;
-      }
-
-      k = j->spec_start;
-      do {
-         unsigned int zig;
-         int c,r,s;
-         if (j->code_bits < 16) stbi__grow_buffer_unsafe(j);
-         c = (j->code_buffer >> (32 - FAST_BITS)) & ((1 << FAST_BITS)-1);
-         r = fac[c];
-         if (r) { // fast-AC path
-            k += (r >> 4) & 15; // run
-            s = r & 15; // combined length
-            if (s > j->code_bits) return stbi__err("bad huffman code", "Combined length longer than code bits available");
-            j->code_buffer <<= s;
-            j->code_bits -= s;
-            zig = stbi__jpeg_dezigzag[k++];
-            data[zig] = (short) ((r >> 8) * (1 << shift));
-         } else {
-            int rs = stbi__jpeg_huff_decode(j, hac);
-            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-            s = rs & 15;
-            r = rs >> 4;
-            if (s == 0) {
-               if (r < 15) {
-                  j->eob_run = (1 << r);
-                  if (r)
-                     j->eob_run += stbi__jpeg_get_bits(j, r);
-                  --j->eob_run;
-                  break;
-               }
-               k += 16;
-            } else {
-               k += r;
-               zig = stbi__jpeg_dezigzag[k++];
-               data[zig] = (short) (stbi__extend_receive(j,s) * (1 << shift));
-            }
-         }
-      } while (k <= j->spec_end);
-   } else {
-      // refinement scan for these AC coefficients
-
-      short bit = (short) (1 << j->succ_low);
-
-      if (j->eob_run) {
-         --j->eob_run;
-         for (k = j->spec_start; k <= j->spec_end; ++k) {
-            short *p = &data[stbi__jpeg_dezigzag[k]];
-            if (*p != 0)
-               if (stbi__jpeg_get_bit(j))
-                  if ((*p & bit)==0) {
-                     if (*p > 0)
-                        *p += bit;
-                     else
-                        *p -= bit;
-                  }
-         }
-      } else {
-         k = j->spec_start;
-         do {
-            int r,s;
-            int rs = stbi__jpeg_huff_decode(j, hac); // @OPTIMIZE see if we can use the fast path here, advance-by-r is so slow, eh
-            if (rs < 0) return stbi__err("bad huffman code","Corrupt JPEG");
-            s = rs & 15;
-            r = rs >> 4;
-            if (s == 0) {
-               if (r < 15) {
-                  j->eob_run = (1 << r) - 1;
-                  if (r)
-                     j->eob_run += stbi__jpeg_get_bits(j, r);
-                  r = 64; // force end of block
-               } else {
-                  // r=15 s=0 should write 16 0s, so we just do
-                  // a run of 15 0s and then write s (which is 0),
-                  // so we don't have to do anything special here
-               }
-            } else {
-               if (s != 1) return stbi__err("bad huffman code", "Corrupt JPEG");
-               // sign bit
-               if (stbi__jpeg_get_bit(j))
-                  s = bit;
-               else
-                  s = -bit;
-            }
-
-            // advance by r
-            while (k <= j->spec_end) {
-               short *p = &data[stbi__jpeg_dezigzag[k++]];
-               if (*p != 0) {
-                  if (stbi__jpeg_get_bit(j))
-                     if ((*p & bit)==0) {
-                        if (*p > 0)
-                           *p += bit;
-                        else
-                           *p -= bit;
-                     }
-               } else {
-                  if (r == 0) {
-                     *p = (short) s;
-                     break;
-                  }
-                  --r;
-               }
-            }
-         } while (k <= j->spec_end);
-      }
-   }
-   return 1;
-}
-
-// take a -128..127 value and stbi__clamp it and convert to 0..255
-stbi_inline static stbi_uc stbi__clamp(int x)
-{
-   // trick to use a single test to catch both cases
-   if ((unsigned int) x > 255) {
-      if (x < 0) return 0;
-      if (x > 255) return 255;
-   }
-   return (stbi_uc) x;
-}
-
-#define stbi__f2f(x)  ((int) (((x) * 4096 + 0.5)))
-#define stbi__fsh(x)  ((x) * 4096)
-
-// derived from jidctint -- DCT_ISLOW
-#define STBI__IDCT_1D(s0,s1,s2,s3,s4,s5,s6,s7) \
-   int t0,t1,t2,t3,p1,p2,p3,p4,p5,x0,x1,x2,x3; \
-   p2 = s2;                                    \
-   p3 = s6;                                    \
-   p1 = (p2+p3) * stbi__f2f(0.5411961f);       \
-   t2 = p1 + p3*stbi__f2f(-1.847759065f);      \
-   t3 = p1 + p2*stbi__f2f( 0.765366865f);      \
-   p2 = s0;                                    \
-   p3 = s4;                                    \
-   t0 = stbi__fsh(p2+p3);                      \
-   t1 = stbi__fsh(p2-p3);                      \
-   x0 = t0+t3;                                 \
-   x3 = t0-t3;                                 \
-   x1 = t1+t2;                                 \
-   x2 = t1-t2;                                 \
-   t0 = s7;                                    \
-   t1 = s5;                                    \
-   t2 = s3;                                    \
-   t3 = s1;                                    \
-   p3 = t0+t2;                                 \
-   p4 = t1+t3;                                 \
-   p1 = t0+t3;                                 \
-   p2 = t1+t2;                                 \
-   p5 = (p3+p4)*stbi__f2f( 1.175875602f);      \
-   t0 = t0*stbi__f2f( 0.298631336f);           \
-   t1 = t1*stbi__f2f( 2.053119869f);           \
-   t2 = t2*stbi__f2f( 3.072711026f);           \
-   t3 = t3*stbi__f2f( 1.501321110f);           \
-   p1 = p5 + p1*stbi__f2f(-0.899976223f);      \
-   p2 = p5 + p2*stbi__f2f(-2.562915447f);      \
-   p3 = p3*stbi__f2f(-1.961570560f);           \
-   p4 = p4*stbi__f2f(-0.390180644f);           \
-   t3 += p1+p4;                                \
-   t2 += p2+p3;                                \
-   t1 += p2+p4;                                \
-   t0 += p1+p3;
-
-static void stbi__idct_block(stbi_uc *out, int out_stride, short data[64])
-{
-   int i,val[64],*v=val;
-   stbi_uc *o;
-   short *d = data;
-
-   // columns
-   for (i=0; i < 8; ++i,++d, ++v) {
-      // if all zeroes, shortcut -- this avoids dequantizing 0s and IDCTing
-      if (d[ 8]==0 && d[16]==0 && d[24]==0 && d[32]==0
-           && d[40]==0 && d[48]==0 && d[56]==0) {
-         //    no shortcut                 0     seconds
-         //    (1|2|3|4|5|6|7)==0          0     seconds
-         //    all separate               -0.047 seconds
-         //    1 && 2|3 && 4|5 && 6|7:    -0.047 seconds
-         int dcterm = d[0]*4;
-         v[0] = v[8] = v[16] = v[24] = v[32] = v[40] = v[48] = v[56] = dcterm;
-      } else {
-         STBI__IDCT_1D(d[ 0],d[ 8],d[16],d[24],d[32],d[40],d[48],d[56])
-         // constants scaled things up by 1<<12; let's bring them back
-         // down, but keep 2 extra bits of precision
-         x0 += 512; x1 += 512; x2 += 512; x3 += 512;
-         v[ 0] = (x0+t3) >> 10;
-         v[56] = (x0-t3) >> 10;
-         v[ 8] = (x1+t2) >> 10;
-         v[48] = (x1-t2) >> 10;
-         v[16] = (x2+t1) >> 10;
-         v[40] = (x2-t1) >> 10;
-         v[24] = (x3+t0) >> 10;
-         v[32] = (x3-t0) >> 10;
-      }
-   }
-
-   for (i=0, v=val, o=out; i < 8; ++i,v+=8,o+=out_stride) {
-      // no fast case since the first 1D IDCT spread components out
-      STBI__IDCT_1D(v[0],v[1],v[2],v[3],v[4],v[5],v[6],v[7])
-      // constants scaled things up by 1<<12, plus we had 1<<2 from first
-      // loop, plus horizontal and vertical each scale by sqrt(8) so together
-      // we've got an extra 1<<3, so 1<<17 total we need to remove.
-      // so we want to round that, which means adding 0.5 * 1<<17,
-      // aka 65536. Also, we'll end up with -128 to 127 that we want
-      // to encode as 0..255 by adding 128, so we'll add that before the shift
-      x0 += 65536 + (128<<17);
-      x1 += 65536 + (128<<17);
-      x2 += 65536 + (128<<17);
-      x3 += 65536 + (128<<17);
-      // tried computing the shifts into temps, or'ing the temps to see
-      // if any were out of range, but that was slower
-      o[0] = stbi__clamp((x0+t3) >> 17);
-      o[7] = stbi__clamp((x0-t3) >> 17);
-      o[1] = stbi__clamp((x1+t2) >> 17);
-      o[6] = stbi__clamp((x1-t2) >> 17);
-      o[2] = stbi__clamp((x2+t1) >> 17);
-      o[5] = stbi__clamp((x2-t1) >> 17);
-      o[3] = stbi__clamp((x3+t0) >> 17);
-      o[4] = stbi__clamp((x3-t0) >> 17);
-   }
-}
-
-#ifdef STBI_SSE2
-// sse2 integer IDCT. not the fastest possible implementation but it
-// produces bit-identical results to the generic C version so it's
-// fully "transparent".
-static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
-{
-   // This is constructed to match our regular (generic) integer IDCT exactly.
-   __m128i row0, row1, row2, row3, row4, row5, row6, row7;
-   __m128i tmp;
-
-   // dot product constant: even elems=x, odd elems=y
-   #define dct_const(x,y)  _mm_setr_epi16((x),(y),(x),(y),(x),(y),(x),(y))
-
-   // out(0) = c0[even]*x + c0[odd]*y   (c0, x, y 16-bit, out 32-bit)
-   // out(1) = c1[even]*x + c1[odd]*y
-   #define dct_rot(out0,out1, x,y,c0,c1) \
-      __m128i c0##lo = _mm_unpacklo_epi16((x),(y)); \
-      __m128i c0##hi = _mm_unpackhi_epi16((x),(y)); \
-      __m128i out0##_l = _mm_madd_epi16(c0##lo, c0); \
-      __m128i out0##_h = _mm_madd_epi16(c0##hi, c0); \
-      __m128i out1##_l = _mm_madd_epi16(c0##lo, c1); \
-      __m128i out1##_h = _mm_madd_epi16(c0##hi, c1)
-
-   // out = in << 12  (in 16-bit, out 32-bit)
-   #define dct_widen(out, in) \
-      __m128i out##_l = _mm_srai_epi32(_mm_unpacklo_epi16(_mm_setzero_si128(), (in)), 4); \
-      __m128i out##_h = _mm_srai_epi32(_mm_unpackhi_epi16(_mm_setzero_si128(), (in)), 4)
-
-   // wide add
-   #define dct_wadd(out, a, b) \
-      __m128i out##_l = _mm_add_epi32(a##_l, b##_l); \
-      __m128i out##_h = _mm_add_epi32(a##_h, b##_h)
-
-   // wide sub
-   #define dct_wsub(out, a, b) \
-      __m128i out##_l = _mm_sub_epi32(a##_l, b##_l); \
-      __m128i out##_h = _mm_sub_epi32(a##_h, b##_h)
-
-   // butterfly a/b, add bias, then shift by "s" and pack
-   #define dct_bfly32o(out0, out1, a,b,bias,s) \
-      { \
-         __m128i abiased_l = _mm_add_epi32(a##_l, bias); \
-         __m128i abiased_h = _mm_add_epi32(a##_h, bias); \
-         dct_wadd(sum, abiased, b); \
-         dct_wsub(dif, abiased, b); \
-         out0 = _mm_packs_epi32(_mm_srai_epi32(sum_l, s), _mm_srai_epi32(sum_h, s)); \
-         out1 = _mm_packs_epi32(_mm_srai_epi32(dif_l, s), _mm_srai_epi32(dif_h, s)); \
-      }
-
-   // 8-bit interleave step (for transposes)
-   #define dct_interleave8(a, b) \
-      tmp = a; \
-      a = _mm_unpacklo_epi8(a, b); \
-      b = _mm_unpackhi_epi8(tmp, b)
-
-   // 16-bit interleave step (for transposes)
-   #define dct_interleave16(a, b) \
-      tmp = a; \
-      a = _mm_unpacklo_epi16(a, b); \
-      b = _mm_unpackhi_epi16(tmp, b)
-
-   #define dct_pass(bias,shift) \
-      { \
-         /* even part */ \
-         dct_rot(t2e,t3e, row2,row6, rot0_0,rot0_1); \
-         __m128i sum04 = _mm_add_epi16(row0, row4); \
-         __m128i dif04 = _mm_sub_epi16(row0, row4); \
-         dct_widen(t0e, sum04); \
-         dct_widen(t1e, dif04); \
-         dct_wadd(x0, t0e, t3e); \
-         dct_wsub(x3, t0e, t3e); \
-         dct_wadd(x1, t1e, t2e); \
-         dct_wsub(x2, t1e, t2e); \
-         /* odd part */ \
-         dct_rot(y0o,y2o, row7,row3, rot2_0,rot2_1); \
-         dct_rot(y1o,y3o, row5,row1, rot3_0,rot3_1); \
-         __m128i sum17 = _mm_add_epi16(row1, row7); \
-         __m128i sum35 = _mm_add_epi16(row3, row5); \
-         dct_rot(y4o,y5o, sum17,sum35, rot1_0,rot1_1); \
-         dct_wadd(x4, y0o, y4o); \
-         dct_wadd(x5, y1o, y5o); \
-         dct_wadd(x6, y2o, y5o); \
-         dct_wadd(x7, y3o, y4o); \
-         dct_bfly32o(row0,row7, x0,x7,bias,shift); \
-         dct_bfly32o(row1,row6, x1,x6,bias,shift); \
-         dct_bfly32o(row2,row5, x2,x5,bias,shift); \
-         dct_bfly32o(row3,row4, x3,x4,bias,shift); \
-      }
-
-   __m128i rot0_0 = dct_const(stbi__f2f(0.5411961f), stbi__f2f(0.5411961f) + stbi__f2f(-1.847759065f));
-   __m128i rot0_1 = dct_const(stbi__f2f(0.5411961f) + stbi__f2f( 0.765366865f), stbi__f2f(0.5411961f));
-   __m128i rot1_0 = dct_const(stbi__f2f(1.175875602f) + stbi__f2f(-0.899976223f), stbi__f2f(1.175875602f));
-   __m128i rot1_1 = dct_const(stbi__f2f(1.175875602f), stbi__f2f(1.175875602f) + stbi__f2f(-2.562915447f));
-   __m128i rot2_0 = dct_const(stbi__f2f(-1.961570560f) + stbi__f2f( 0.298631336f), stbi__f2f(-1.961570560f));
-   __m128i rot2_1 = dct_const(stbi__f2f(-1.961570560f), stbi__f2f(-1.961570560f) + stbi__f2f( 3.072711026f));
-   __m128i rot3_0 = dct_const(stbi__f2f(-0.390180644f) + stbi__f2f( 2.053119869f), stbi__f2f(-0.390180644f));
-   __m128i rot3_1 = dct_const(stbi__f2f(-0.390180644f), stbi__f2f(-0.390180644f) + stbi__f2f( 1.501321110f));
-
-   // rounding biases in column/row passes, see stbi__idct_block for explanation.
-   __m128i bias_0 = _mm_set1_epi32(512);
-   __m128i bias_1 = _mm_set1_epi32(65536 + (128<<17));
-
-   // load
-   row0 = _mm_load_si128((const __m128i *) (data + 0*8));
-   row1 = _mm_load_si128((const __m128i *) (data + 1*8));
-   row2 = _mm_load_si128((const __m128i *) (data + 2*8));
-   row3 = _mm_load_si128((const __m128i *) (data + 3*8));
-   row4 = _mm_load_si128((const __m128i *) (data + 4*8));
-   row5 = _mm_load_si128((const __m128i *) (data + 5*8));
-   row6 = _mm_load_si128((const __m128i *) (data + 6*8));
-   row7 = _mm_load_si128((const __m128i *) (data + 7*8));
-
-   // column pass
-   dct_pass(bias_0, 10);
-
-   {
-      // 16bit 8x8 transpose pass 1
-      dct_interleave16(row0, row4);
-      dct_interleave16(row1, row5);
-      dct_interleave16(row2, row6);
-      dct_interleave16(row3, row7);
-
-      // transpose pass 2
-      dct_interleave16(row0, row2);
-      dct_interleave16(row1, row3);
-      dct_interleave16(row4, row6);
-      dct_interleave16(row5, row7);
-
-      // transpose pass 3
-      dct_interleave16(row0, row1);
-      dct_interleave16(row2, row3);
-      dct_interleave16(row4, row5);
-      dct_interleave16(row6, row7);
-   }
-
-   // row pass
-   dct_pass(bias_1, 17);
-
-   {
-      // pack
-      __m128i p0 = _mm_packus_epi16(row0, row1); // a0a1a2a3...a7b0b1b2b3...b7
-      __m128i p1 = _mm_packus_epi16(row2, row3);
-      __m128i p2 = _mm_packus_epi16(row4, row5);
-      __m128i p3 = _mm_packus_epi16(row6, row7);
-
-      // 8bit 8x8 transpose pass 1
-      dct_interleave8(p0, p2); // a0e0a1e1...
-      dct_interleave8(p1, p3); // c0g0c1g1...
-
-      // transpose pass 2
-      dct_interleave8(p0, p1); // a0c0e0g0...
-      dct_interleave8(p2, p3); // b0d0f0h0...
-
-      // transpose pass 3
-      dct_interleave8(p0, p2); // a0b0c0d0...
-      dct_interleave8(p1, p3); // a4b4c4d4...
-
-      // store
-      _mm_storel_epi64((__m128i *) out, p0); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p0, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p2); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p2, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p1); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p1, 0x4e)); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, p3); out += out_stride;
-      _mm_storel_epi64((__m128i *) out, _mm_shuffle_epi32(p3, 0x4e));
-   }
-
-#undef dct_const
-#undef dct_rot
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_interleave8
-#undef dct_interleave16
-#undef dct_pass
-}
-
-#endif // STBI_SSE2
-
-#ifdef STBI_NEON
-
-// NEON integer IDCT. should produce bit-identical
-// results to the generic C version.
-static void stbi__idct_simd(stbi_uc *out, int out_stride, short data[64])
-{
-   int16x8_t row0, row1, row2, row3, row4, row5, row6, row7;
-
-   int16x4_t rot0_0 = vdup_n_s16(stbi__f2f(0.5411961f));
-   int16x4_t rot0_1 = vdup_n_s16(stbi__f2f(-1.847759065f));
-   int16x4_t rot0_2 = vdup_n_s16(stbi__f2f( 0.765366865f));
-   int16x4_t rot1_0 = vdup_n_s16(stbi__f2f( 1.175875602f));
-   int16x4_t rot1_1 = vdup_n_s16(stbi__f2f(-0.899976223f));
-   int16x4_t rot1_2 = vdup_n_s16(stbi__f2f(-2.562915447f));
-   int16x4_t rot2_0 = vdup_n_s16(stbi__f2f(-1.961570560f));
-   int16x4_t rot2_1 = vdup_n_s16(stbi__f2f(-0.390180644f));
-   int16x4_t rot3_0 = vdup_n_s16(stbi__f2f( 0.298631336f));
-   int16x4_t rot3_1 = vdup_n_s16(stbi__f2f( 2.053119869f));
-   int16x4_t rot3_2 = vdup_n_s16(stbi__f2f( 3.072711026f));
-   int16x4_t rot3_3 = vdup_n_s16(stbi__f2f( 1.501321110f));
-
-#define dct_long_mul(out, inq, coeff) \
-   int32x4_t out##_l = vmull_s16(vget_low_s16(inq), coeff); \
-   int32x4_t out##_h = vmull_s16(vget_high_s16(inq), coeff)
-
-#define dct_long_mac(out, acc, inq, coeff) \
-   int32x4_t out##_l = vmlal_s16(acc##_l, vget_low_s16(inq), coeff); \
-   int32x4_t out##_h = vmlal_s16(acc##_h, vget_high_s16(inq), coeff)
-
-#define dct_widen(out, inq) \
-   int32x4_t out##_l = vshll_n_s16(vget_low_s16(inq), 12); \
-   int32x4_t out##_h = vshll_n_s16(vget_high_s16(inq), 12)
-
-// wide add
-#define dct_wadd(out, a, b) \
-   int32x4_t out##_l = vaddq_s32(a##_l, b##_l); \
-   int32x4_t out##_h = vaddq_s32(a##_h, b##_h)
-
-// wide sub
-#define dct_wsub(out, a, b) \
-   int32x4_t out##_l = vsubq_s32(a##_l, b##_l); \
-   int32x4_t out##_h = vsubq_s32(a##_h, b##_h)
-
-// butterfly a/b, then shift using "shiftop" by "s" and pack
-#define dct_bfly32o(out0,out1, a,b,shiftop,s) \
-   { \
-      dct_wadd(sum, a, b); \
-      dct_wsub(dif, a, b); \
-      out0 = vcombine_s16(shiftop(sum_l, s), shiftop(sum_h, s)); \
-      out1 = vcombine_s16(shiftop(dif_l, s), shiftop(dif_h, s)); \
-   }
-
-#define dct_pass(shiftop, shift) \
-   { \
-      /* even part */ \
-      int16x8_t sum26 = vaddq_s16(row2, row6); \
-      dct_long_mul(p1e, sum26, rot0_0); \
-      dct_long_mac(t2e, p1e, row6, rot0_1); \
-      dct_long_mac(t3e, p1e, row2, rot0_2); \
-      int16x8_t sum04 = vaddq_s16(row0, row4); \
-      int16x8_t dif04 = vsubq_s16(row0, row4); \
-      dct_widen(t0e, sum04); \
-      dct_widen(t1e, dif04); \
-      dct_wadd(x0, t0e, t3e); \
-      dct_wsub(x3, t0e, t3e); \
-      dct_wadd(x1, t1e, t2e); \
-      dct_wsub(x2, t1e, t2e); \
-      /* odd part */ \
-      int16x8_t sum15 = vaddq_s16(row1, row5); \
-      int16x8_t sum17 = vaddq_s16(row1, row7); \
-      int16x8_t sum35 = vaddq_s16(row3, row5); \
-      int16x8_t sum37 = vaddq_s16(row3, row7); \
-      int16x8_t sumodd = vaddq_s16(sum17, sum35); \
-      dct_long_mul(p5o, sumodd, rot1_0); \
-      dct_long_mac(p1o, p5o, sum17, rot1_1); \
-      dct_long_mac(p2o, p5o, sum35, rot1_2); \
-      dct_long_mul(p3o, sum37, rot2_0); \
-      dct_long_mul(p4o, sum15, rot2_1); \
-      dct_wadd(sump13o, p1o, p3o); \
-      dct_wadd(sump24o, p2o, p4o); \
-      dct_wadd(sump23o, p2o, p3o); \
-      dct_wadd(sump14o, p1o, p4o); \
-      dct_long_mac(x4, sump13o, row7, rot3_0); \
-      dct_long_mac(x5, sump24o, row5, rot3_1); \
-      dct_long_mac(x6, sump23o, row3, rot3_2); \
-      dct_long_mac(x7, sump14o, row1, rot3_3); \
-      dct_bfly32o(row0,row7, x0,x7,shiftop,shift); \
-      dct_bfly32o(row1,row6, x1,x6,shiftop,shift); \
-      dct_bfly32o(row2,row5, x2,x5,shiftop,shift); \
-      dct_bfly32o(row3,row4, x3,x4,shiftop,shift); \
-   }
-
-   // load
-   row0 = vld1q_s16(data + 0*8);
-   row1 = vld1q_s16(data + 1*8);
-   row2 = vld1q_s16(data + 2*8);
-   row3 = vld1q_s16(data + 3*8);
-   row4 = vld1q_s16(data + 4*8);
-   row5 = vld1q_s16(data + 5*8);
-   row6 = vld1q_s16(data + 6*8);
-   row7 = vld1q_s16(data + 7*8);
-
-   // add DC bias
-   row0 = vaddq_s16(row0, vsetq_lane_s16(1024, vdupq_n_s16(0), 0));
-
-   // column pass
-   dct_pass(vrshrn_n_s32, 10);
-
-   // 16bit 8x8 transpose
-   {
-// these three map to a single VTRN.16, VTRN.32, and VSWP, respectively.
-// whether compilers actually get this is another story, sadly.
-#define dct_trn16(x, y) { int16x8x2_t t = vtrnq_s16(x, y); x = t.val[0]; y = t.val[1]; }
-#define dct_trn32(x, y) { int32x4x2_t t = vtrnq_s32(vreinterpretq_s32_s16(x), vreinterpretq_s32_s16(y)); x = vreinterpretq_s16_s32(t.val[0]); y = vreinterpretq_s16_s32(t.val[1]); }
-#define dct_trn64(x, y) { int16x8_t x0 = x; int16x8_t y0 = y; x = vcombine_s16(vget_low_s16(x0), vget_low_s16(y0)); y = vcombine_s16(vget_high_s16(x0), vget_high_s16(y0)); }
-
-      // pass 1
-      dct_trn16(row0, row1); // a0b0a2b2a4b4a6b6
-      dct_trn16(row2, row3);
-      dct_trn16(row4, row5);
-      dct_trn16(row6, row7);
-
-      // pass 2
-      dct_trn32(row0, row2); // a0b0c0d0a4b4c4d4
-      dct_trn32(row1, row3);
-      dct_trn32(row4, row6);
-      dct_trn32(row5, row7);
-
-      // pass 3
-      dct_trn64(row0, row4); // a0b0c0d0e0f0g0h0
-      dct_trn64(row1, row5);
-      dct_trn64(row2, row6);
-      dct_trn64(row3, row7);
-
-#undef dct_trn16
-#undef dct_trn32
-#undef dct_trn64
-   }
-
-   // row pass
-   // vrshrn_n_s32 only supports shifts up to 16, we need
-   // 17. so do a non-rounding shift of 16 first then follow
-   // up with a rounding shift by 1.
-   dct_pass(vshrn_n_s32, 16);
-
-   {
-      // pack and round
-      uint8x8_t p0 = vqrshrun_n_s16(row0, 1);
-      uint8x8_t p1 = vqrshrun_n_s16(row1, 1);
-      uint8x8_t p2 = vqrshrun_n_s16(row2, 1);
-      uint8x8_t p3 = vqrshrun_n_s16(row3, 1);
-      uint8x8_t p4 = vqrshrun_n_s16(row4, 1);
-      uint8x8_t p5 = vqrshrun_n_s16(row5, 1);
-      uint8x8_t p6 = vqrshrun_n_s16(row6, 1);
-      uint8x8_t p7 = vqrshrun_n_s16(row7, 1);
-
-      // again, these can translate into one instruction, but often don't.
-#define dct_trn8_8(x, y) { uint8x8x2_t t = vtrn_u8(x, y); x = t.val[0]; y = t.val[1]; }
-#define dct_trn8_16(x, y) { uint16x4x2_t t = vtrn_u16(vreinterpret_u16_u8(x), vreinterpret_u16_u8(y)); x = vreinterpret_u8_u16(t.val[0]); y = vreinterpret_u8_u16(t.val[1]); }
-#define dct_trn8_32(x, y) { uint32x2x2_t t = vtrn_u32(vreinterpret_u32_u8(x), vreinterpret_u32_u8(y)); x = vreinterpret_u8_u32(t.val[0]); y = vreinterpret_u8_u32(t.val[1]); }
-
-      // sadly can't use interleaved stores here since we only write
-      // 8 bytes to each scan line!
-
-      // 8x8 8-bit transpose pass 1
-      dct_trn8_8(p0, p1);
-      dct_trn8_8(p2, p3);
-      dct_trn8_8(p4, p5);
-      dct_trn8_8(p6, p7);
-
-      // pass 2
-      dct_trn8_16(p0, p2);
-      dct_trn8_16(p1, p3);
-      dct_trn8_16(p4, p6);
-      dct_trn8_16(p5, p7);
-
-      // pass 3
-      dct_trn8_32(p0, p4);
-      dct_trn8_32(p1, p5);
-      dct_trn8_32(p2, p6);
-      dct_trn8_32(p3, p7);
-
-      // store
-      vst1_u8(out, p0); out += out_stride;
-      vst1_u8(out, p1); out += out_stride;
-      vst1_u8(out, p2); out += out_stride;
-      vst1_u8(out, p3); out += out_stride;
-      vst1_u8(out, p4); out += out_stride;
-      vst1_u8(out, p5); out += out_stride;
-      vst1_u8(out, p6); out += out_stride;
-      vst1_u8(out, p7);
-
-#undef dct_trn8_8
-#undef dct_trn8_16
-#undef dct_trn8_32
-   }
-
-#undef dct_long_mul
-#undef dct_long_mac
-#undef dct_widen
-#undef dct_wadd
-#undef dct_wsub
-#undef dct_bfly32o
-#undef dct_pass
-}
-
-#endif // STBI_NEON
-
-#define STBI__MARKER_none  0xff
-// if there's a pending marker from the entropy stream, return that
-// otherwise, fetch from the stream and get a marker. if there's no
-// marker, return 0xff, which is never a valid marker value
-static stbi_uc stbi__get_marker(stbi__jpeg *j)
-{
-   stbi_uc x;
-   if (j->marker != STBI__MARKER_none) { x = j->marker; j->marker = STBI__MARKER_none; return x; }
-   x = stbi__get8(j->s);
-   if (x != 0xff) return STBI__MARKER_none;
-   while (x == 0xff)
-      x = stbi__get8(j->s); // consume repeated 0xff fill bytes
-   return x;
-}
-
-// in each scan, we'll have scan_n components, and the order
-// of the components is specified by order[]
-#define STBI__RESTART(x)     ((x) >= 0xd0 && (x) <= 0xd7)
-
-// after a restart interval, stbi__jpeg_reset the entropy decoder and
-// the dc prediction
-static void stbi__jpeg_reset(stbi__jpeg *j)
-{
-   j->code_bits = 0;
-   j->code_buffer = 0;
-   j->nomore = 0;
-   j->img_comp[0].dc_pred = j->img_comp[1].dc_pred = j->img_comp[2].dc_pred = j->img_comp[3].dc_pred = 0;
-   j->marker = STBI__MARKER_none;
-   j->todo = j->restart_interval ? j->restart_interval : 0x7fffffff;
-   j->eob_run = 0;
-   // no more than 1<<31 MCUs if no restart_interal? that's plenty safe,
-   // since we don't even allow 1<<30 pixels
-}
-
-static int stbi__parse_entropy_coded_data(stbi__jpeg *z)
-{
-   stbi__jpeg_reset(z);
-   if (!z->progressive) {
-      if (z->scan_n == 1) {
-         int i,j;
-         STBI_SIMD_ALIGN(short, data[64]);
-         int n = z->order[0];
-         // non-interleaved data, we just need to process one block at a time,
-         // in trivial scanline order
-         // number of blocks to do just depends on how many actual "pixels" this
-         // component has, independent of interleaved MCU blocking and such
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               int ha = z->img_comp[n].ha;
-               if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
-               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
-               // every data block is an MCU, so countdown the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  // if it's NOT a restart, then just bail, so we get corrupt data
-                  // rather than no data
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      } else { // interleaved
-         int i,j,k,x,y;
-         STBI_SIMD_ALIGN(short, data[64]);
-         for (j=0; j < z->img_mcu_y; ++j) {
-            for (i=0; i < z->img_mcu_x; ++i) {
-               // scan an interleaved mcu... process scan_n components in order
-               for (k=0; k < z->scan_n; ++k) {
-                  int n = z->order[k];
-                  // scan out an mcu's worth of this component; that's just determined
-                  // by the basic H and V specified for the component
-                  for (y=0; y < z->img_comp[n].v; ++y) {
-                     for (x=0; x < z->img_comp[n].h; ++x) {
-                        int x2 = (i*z->img_comp[n].h + x)*8;
-                        int y2 = (j*z->img_comp[n].v + y)*8;
-                        int ha = z->img_comp[n].ha;
-                        if (!stbi__jpeg_decode_block(z, data, z->huff_dc+z->img_comp[n].hd, z->huff_ac+ha, z->fast_ac[ha], n, z->dequant[z->img_comp[n].tq])) return 0;
-                        z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*y2+x2, z->img_comp[n].w2, data);
-                     }
-                  }
-               }
-               // after all interleaved components, that's an interleaved MCU,
-               // so now count down the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      }
-   } else {
-      if (z->scan_n == 1) {
-         int i,j;
-         int n = z->order[0];
-         // non-interleaved data, we just need to process one block at a time,
-         // in trivial scanline order
-         // number of blocks to do just depends on how many actual "pixels" this
-         // component has, independent of interleaved MCU blocking and such
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-               if (z->spec_start == 0) {
-                  if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-                     return 0;
-               } else {
-                  int ha = z->img_comp[n].ha;
-                  if (!stbi__jpeg_decode_block_prog_ac(z, data, &z->huff_ac[ha], z->fast_ac[ha]))
-                     return 0;
-               }
-               // every data block is an MCU, so countdown the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      } else { // interleaved
-         int i,j,k,x,y;
-         for (j=0; j < z->img_mcu_y; ++j) {
-            for (i=0; i < z->img_mcu_x; ++i) {
-               // scan an interleaved mcu... process scan_n components in order
-               for (k=0; k < z->scan_n; ++k) {
-                  int n = z->order[k];
-                  // scan out an mcu's worth of this component; that's just determined
-                  // by the basic H and V specified for the component
-                  for (y=0; y < z->img_comp[n].v; ++y) {
-                     for (x=0; x < z->img_comp[n].h; ++x) {
-                        int x2 = (i*z->img_comp[n].h + x);
-                        int y2 = (j*z->img_comp[n].v + y);
-                        short *data = z->img_comp[n].coeff + 64 * (x2 + y2 * z->img_comp[n].coeff_w);
-                        if (!stbi__jpeg_decode_block_prog_dc(z, data, &z->huff_dc[z->img_comp[n].hd], n))
-                           return 0;
-                     }
-                  }
-               }
-               // after all interleaved components, that's an interleaved MCU,
-               // so now count down the restart interval
-               if (--z->todo <= 0) {
-                  if (z->code_bits < 24) stbi__grow_buffer_unsafe(z);
-                  if (!STBI__RESTART(z->marker)) return 1;
-                  stbi__jpeg_reset(z);
-               }
-            }
-         }
-         return 1;
-      }
-   }
-}
-
-static void stbi__jpeg_dequantize(short *data, stbi__uint16 *dequant)
-{
-   int i;
-   for (i=0; i < 64; ++i)
-      data[i] *= dequant[i];
-}
-
-static void stbi__jpeg_finish(stbi__jpeg *z)
-{
-   if (z->progressive) {
-      // dequantize and idct the data
-      int i,j,n;
-      for (n=0; n < z->s->img_n; ++n) {
-         int w = (z->img_comp[n].x+7) >> 3;
-         int h = (z->img_comp[n].y+7) >> 3;
-         for (j=0; j < h; ++j) {
-            for (i=0; i < w; ++i) {
-               short *data = z->img_comp[n].coeff + 64 * (i + j * z->img_comp[n].coeff_w);
-               stbi__jpeg_dequantize(data, z->dequant[z->img_comp[n].tq]);
-               z->idct_block_kernel(z->img_comp[n].data+z->img_comp[n].w2*j*8+i*8, z->img_comp[n].w2, data);
-            }
-         }
-      }
-   }
-}
-
-static int stbi__process_marker(stbi__jpeg *z, int m)
-{
-   int L;
-   switch (m) {
-      case STBI__MARKER_none: // no marker found
-         return stbi__err("expected marker","Corrupt JPEG");
-
-      case 0xDD: // DRI - specify restart interval
-         if (stbi__get16be(z->s) != 4) return stbi__err("bad DRI len","Corrupt JPEG");
-         z->restart_interval = stbi__get16be(z->s);
-         return 1;
-
-      case 0xDB: // DQT - define quantization table
-         L = stbi__get16be(z->s)-2;
-         while (L > 0) {
-            int q = stbi__get8(z->s);
-            int p = q >> 4, sixteen = (p != 0);
-            int t = q & 15,i;
-            if (p != 0 && p != 1) return stbi__err("bad DQT type","Corrupt JPEG");
-            if (t > 3) return stbi__err("bad DQT table","Corrupt JPEG");
-
-            for (i=0; i < 64; ++i)
-               z->dequant[t][stbi__jpeg_dezigzag[i]] = (stbi__uint16)(sixteen ? stbi__get16be(z->s) : stbi__get8(z->s));
-            L -= (sixteen ? 129 : 65);
-         }
-         return L==0;
-
-      case 0xC4: // DHT - define huffman table
-         L = stbi__get16be(z->s)-2;
-         while (L > 0) {
-            stbi_uc *v;
-            int sizes[16],i,n=0;
-            int q = stbi__get8(z->s);
-            int tc = q >> 4;
-            int th = q & 15;
-            if (tc > 1 || th > 3) return stbi__err("bad DHT header","Corrupt JPEG");
-            for (i=0; i < 16; ++i) {
-               sizes[i] = stbi__get8(z->s);
-               n += sizes[i];
-            }
-            if(n > 256) return stbi__err("bad DHT header","Corrupt JPEG"); // Loop over i < n would write past end of values!
-            L -= 17;
-            if (tc == 0) {
-               if (!stbi__build_huffman(z->huff_dc+th, sizes)) return 0;
-               v = z->huff_dc[th].values;
-            } else {
-               if (!stbi__build_huffman(z->huff_ac+th, sizes)) return 0;
-               v = z->huff_ac[th].values;
-            }
-            for (i=0; i < n; ++i)
-               v[i] = stbi__get8(z->s);
-            if (tc != 0)
-               stbi__build_fast_ac(z->fast_ac[th], z->huff_ac + th);
-            L -= n;
-         }
-         return L==0;
-   }
-
-   // check for comment block or APP blocks
-   if ((m >= 0xE0 && m <= 0xEF) || m == 0xFE) {
-      L = stbi__get16be(z->s);
-      if (L < 2) {
-         if (m == 0xFE)
-            return stbi__err("bad COM len","Corrupt JPEG");
-         else
-            return stbi__err("bad APP len","Corrupt JPEG");
-      }
-      L -= 2;
-
-      if (m == 0xE0 && L >= 5) { // JFIF APP0 segment
-         static const unsigned char tag[5] = {'J','F','I','F','\0'};
-         int ok = 1;
-         int i;
-         for (i=0; i < 5; ++i)
-            if (stbi__get8(z->s) != tag[i])
-               ok = 0;
-         L -= 5;
-         if (ok)
-            z->jfif = 1;
-      } else if (m == 0xEE && L >= 12) { // Adobe APP14 segment
-         static const unsigned char tag[6] = {'A','d','o','b','e','\0'};
-         int ok = 1;
-         int i;
-         for (i=0; i < 6; ++i)
-            if (stbi__get8(z->s) != tag[i])
-               ok = 0;
-         L -= 6;
-         if (ok) {
-            stbi__get8(z->s); // version
-            stbi__get16be(z->s); // flags0
-            stbi__get16be(z->s); // flags1
-            z->app14_color_transform = stbi__get8(z->s); // color transform
-            L -= 6;
-         }
-      }
-
-      stbi__skip(z->s, L);
-      return 1;
-   }
-
-   return stbi__err("unknown marker","Corrupt JPEG");
-}
-
-// after we see SOS
-static int stbi__process_scan_header(stbi__jpeg *z)
-{
-   int i;
-   int Ls = stbi__get16be(z->s);
-   z->scan_n = stbi__get8(z->s);
-   if (z->scan_n < 1 || z->scan_n > 4 || z->scan_n > (int) z->s->img_n) return stbi__err("bad SOS component count","Corrupt JPEG");
-   if (Ls != 6+2*z->scan_n) return stbi__err("bad SOS len","Corrupt JPEG");
-   for (i=0; i < z->scan_n; ++i) {
-      int id = stbi__get8(z->s), which;
-      int q = stbi__get8(z->s);
-      for (which = 0; which < z->s->img_n; ++which)
-         if (z->img_comp[which].id == id)
-            break;
-      if (which == z->s->img_n) return 0; // no match
-      z->img_comp[which].hd = q >> 4;   if (z->img_comp[which].hd > 3) return stbi__err("bad DC huff","Corrupt JPEG");
-      z->img_comp[which].ha = q & 15;   if (z->img_comp[which].ha > 3) return stbi__err("bad AC huff","Corrupt JPEG");
-      z->order[i] = which;
-   }
-
-   {
-      int aa;
-      z->spec_start = stbi__get8(z->s);
-      z->spec_end   = stbi__get8(z->s); // should be 63, but might be 0
-      aa = stbi__get8(z->s);
-      z->succ_high = (aa >> 4);
-      z->succ_low  = (aa & 15);
-      if (z->progressive) {
-         if (z->spec_start > 63 || z->spec_end > 63  || z->spec_start > z->spec_end || z->succ_high > 13 || z->succ_low > 13)
-            return stbi__err("bad SOS", "Corrupt JPEG");
-      } else {
-         if (z->spec_start != 0) return stbi__err("bad SOS","Corrupt JPEG");
-         if (z->succ_high != 0 || z->succ_low != 0) return stbi__err("bad SOS","Corrupt JPEG");
-         z->spec_end = 63;
-      }
-   }
-
-   return 1;
-}
-
-static int stbi__free_jpeg_components(stbi__jpeg *z, int ncomp, int why)
-{
-   int i;
-   for (i=0; i < ncomp; ++i) {
-      if (z->img_comp[i].raw_data) {
-         STBI_FREE(z->img_comp[i].raw_data);
-         z->img_comp[i].raw_data = NULL;
-         z->img_comp[i].data = NULL;
-      }
-      if (z->img_comp[i].raw_coeff) {
-         STBI_FREE(z->img_comp[i].raw_coeff);
-         z->img_comp[i].raw_coeff = 0;
-         z->img_comp[i].coeff = 0;
-      }
-      if (z->img_comp[i].linebuf) {
-         STBI_FREE(z->img_comp[i].linebuf);
-         z->img_comp[i].linebuf = NULL;
-      }
-   }
-   return why;
-}
-
-static int stbi__process_frame_header(stbi__jpeg *z, int scan)
-{
-   stbi__context *s = z->s;
-   int Lf,p,i,q, h_max=1,v_max=1,c;
-   Lf = stbi__get16be(s);         if (Lf < 11) return stbi__err("bad SOF len","Corrupt JPEG"); // JPEG
-   p  = stbi__get8(s);            if (p != 8) return stbi__err("only 8-bit","JPEG format not supported: 8-bit only"); // JPEG baseline
-   s->img_y = stbi__get16be(s);   if (s->img_y == 0) return stbi__err("no header height", "JPEG format not supported: delayed height"); // Legal, but we don't handle it--but neither does IJG
-   s->img_x = stbi__get16be(s);   if (s->img_x == 0) return stbi__err("0 width","Corrupt JPEG"); // JPEG requires
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   c = stbi__get8(s);
-   if (c != 3 && c != 1 && c != 4) return stbi__err("bad component count","Corrupt JPEG");
-   s->img_n = c;
-   for (i=0; i < c; ++i) {
-      z->img_comp[i].data = NULL;
-      z->img_comp[i].linebuf = NULL;
-   }
-
-   if (Lf != 8+3*s->img_n) return stbi__err("bad SOF len","Corrupt JPEG");
-
-   z->rgb = 0;
-   for (i=0; i < s->img_n; ++i) {
-      static const unsigned char rgb[3] = { 'R', 'G', 'B' };
-      z->img_comp[i].id = stbi__get8(s);
-      if (s->img_n == 3 && z->img_comp[i].id == rgb[i])
-         ++z->rgb;
-      q = stbi__get8(s);
-      z->img_comp[i].h = (q >> 4);  if (!z->img_comp[i].h || z->img_comp[i].h > 4) return stbi__err("bad H","Corrupt JPEG");
-      z->img_comp[i].v = q & 15;    if (!z->img_comp[i].v || z->img_comp[i].v > 4) return stbi__err("bad V","Corrupt JPEG");
-      z->img_comp[i].tq = stbi__get8(s);  if (z->img_comp[i].tq > 3) return stbi__err("bad TQ","Corrupt JPEG");
-   }
-
-   if (scan != STBI__SCAN_load) return 1;
-
-   if (!stbi__mad3sizes_valid(s->img_x, s->img_y, s->img_n, 0)) return stbi__err("too large", "Image too large to decode");
-
-   for (i=0; i < s->img_n; ++i) {
-      if (z->img_comp[i].h > h_max) h_max = z->img_comp[i].h;
-      if (z->img_comp[i].v > v_max) v_max = z->img_comp[i].v;
-   }
-
-   // check that plane subsampling factors are integer ratios; our resamplers can't deal with fractional ratios
-   // and I've never seen a non-corrupted JPEG file actually use them
-   for (i=0; i < s->img_n; ++i) {
-      if (h_max % z->img_comp[i].h != 0) return stbi__err("bad H","Corrupt JPEG");
-      if (v_max % z->img_comp[i].v != 0) return stbi__err("bad V","Corrupt JPEG");
-   }
-
-   // compute interleaved mcu info
-   z->img_h_max = h_max;
-   z->img_v_max = v_max;
-   z->img_mcu_w = h_max * 8;
-   z->img_mcu_h = v_max * 8;
-   // these sizes can't be more than 17 bits
-   z->img_mcu_x = (s->img_x + z->img_mcu_w-1) / z->img_mcu_w;
-   z->img_mcu_y = (s->img_y + z->img_mcu_h-1) / z->img_mcu_h;
-
-   for (i=0; i < s->img_n; ++i) {
-      // number of effective pixels (e.g. for non-interleaved MCU)
-      z->img_comp[i].x = (s->img_x * z->img_comp[i].h + h_max-1) / h_max;
-      z->img_comp[i].y = (s->img_y * z->img_comp[i].v + v_max-1) / v_max;
-      // to simplify generation, we'll allocate enough memory to decode
-      // the bogus oversized data from using interleaved MCUs and their
-      // big blocks (e.g. a 16x16 iMCU on an image of width 33); we won't
-      // discard the extra data until colorspace conversion
-      //
-      // img_mcu_x, img_mcu_y: <=17 bits; comp[i].h and .v are <=4 (checked earlier)
-      // so these muls can't overflow with 32-bit ints (which we require)
-      z->img_comp[i].w2 = z->img_mcu_x * z->img_comp[i].h * 8;
-      z->img_comp[i].h2 = z->img_mcu_y * z->img_comp[i].v * 8;
-      z->img_comp[i].coeff = 0;
-      z->img_comp[i].raw_coeff = 0;
-      z->img_comp[i].linebuf = NULL;
-      z->img_comp[i].raw_data = stbi__malloc_mad2(z->img_comp[i].w2, z->img_comp[i].h2, 15);
-      if (z->img_comp[i].raw_data == NULL)
-         return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
-      // align blocks for idct using mmx/sse
-      z->img_comp[i].data = (stbi_uc*) (((size_t) z->img_comp[i].raw_data + 15) & ~15);
-      if (z->progressive) {
-         // w2, h2 are multiples of 8 (see above)
-         z->img_comp[i].coeff_w = z->img_comp[i].w2 / 8;
-         z->img_comp[i].coeff_h = z->img_comp[i].h2 / 8;
-         z->img_comp[i].raw_coeff = stbi__malloc_mad3(z->img_comp[i].w2, z->img_comp[i].h2, sizeof(short), 15);
-         if (z->img_comp[i].raw_coeff == NULL)
-            return stbi__free_jpeg_components(z, i+1, stbi__err("outofmem", "Out of memory"));
-         z->img_comp[i].coeff = (short*) (((size_t) z->img_comp[i].raw_coeff + 15) & ~15);
-      }
-   }
-
-   return 1;
-}
-
-// use comparisons since in some cases we handle more than one case (e.g. SOF)
-#define stbi__DNL(x)         ((x) == 0xdc)
-#define stbi__SOI(x)         ((x) == 0xd8)
-#define stbi__EOI(x)         ((x) == 0xd9)
-#define stbi__SOF(x)         ((x) == 0xc0 || (x) == 0xc1 || (x) == 0xc2)
-#define stbi__SOS(x)         ((x) == 0xda)
-
-#define stbi__SOF_progressive(x)   ((x) == 0xc2)
-
-static int stbi__decode_jpeg_header(stbi__jpeg *z, int scan)
-{
-   int m;
-   z->jfif = 0;
-   z->app14_color_transform = -1; // valid values are 0,1,2
-   z->marker = STBI__MARKER_none; // initialize cached marker to empty
-   m = stbi__get_marker(z);
-   if (!stbi__SOI(m)) return stbi__err("no SOI","Corrupt JPEG");
-   if (scan == STBI__SCAN_type) return 1;
-   m = stbi__get_marker(z);
-   while (!stbi__SOF(m)) {
-      if (!stbi__process_marker(z,m)) return 0;
-      m = stbi__get_marker(z);
-      while (m == STBI__MARKER_none) {
-         // some files have extra padding after their blocks, so ok, we'll scan
-         if (stbi__at_eof(z->s)) return stbi__err("no SOF", "Corrupt JPEG");
-         m = stbi__get_marker(z);
-      }
-   }
-   z->progressive = stbi__SOF_progressive(m);
-   if (!stbi__process_frame_header(z, scan)) return 0;
-   return 1;
-}
-
-static int stbi__skip_jpeg_junk_at_end(stbi__jpeg *j)
-{
-   // some JPEGs have junk at end, skip over it but if we find what looks
-   // like a valid marker, resume there
-   while (!stbi__at_eof(j->s)) {
-      int x = stbi__get8(j->s);
-      while (x == 255) { // might be a marker
-         if (stbi__at_eof(j->s)) return STBI__MARKER_none;
-         x = stbi__get8(j->s);
-         if (x != 0x00 && x != 0xff) {
-            // not a stuffed zero or lead-in to another marker, looks
-            // like an actual marker, return it
-            return x;
-         }
-         // stuffed zero has x=0 now which ends the loop, meaning we go
-         // back to regular scan loop.
-         // repeated 0xff keeps trying to read the next byte of the marker.
-      }
-   }
-   return STBI__MARKER_none;
-}
-
-// decode image to YCbCr format
-static int stbi__decode_jpeg_image(stbi__jpeg *j)
-{
-   int m;
-   for (m = 0; m < 4; m++) {
-      j->img_comp[m].raw_data = NULL;
-      j->img_comp[m].raw_coeff = NULL;
-   }
-   j->restart_interval = 0;
-   if (!stbi__decode_jpeg_header(j, STBI__SCAN_load)) return 0;
-   m = stbi__get_marker(j);
-   while (!stbi__EOI(m)) {
-      if (stbi__SOS(m)) {
-         if (!stbi__process_scan_header(j)) return 0;
-         if (!stbi__parse_entropy_coded_data(j)) return 0;
-         if (j->marker == STBI__MARKER_none ) {
-         j->marker = stbi__skip_jpeg_junk_at_end(j);
-            // if we reach eof without hitting a marker, stbi__get_marker() below will fail and we'll eventually return 0
-         }
-         m = stbi__get_marker(j);
-         if (STBI__RESTART(m))
-            m = stbi__get_marker(j);
-      } else if (stbi__DNL(m)) {
-         int Ld = stbi__get16be(j->s);
-         stbi__uint32 NL = stbi__get16be(j->s);
-         if (Ld != 4) return stbi__err("bad DNL len", "Corrupt JPEG");
-         if (NL != j->s->img_y) return stbi__err("bad DNL height", "Corrupt JPEG");
-         m = stbi__get_marker(j);
-      } else {
-         if (!stbi__process_marker(j, m)) return 1;
-         m = stbi__get_marker(j);
-      }
-   }
-   if (j->progressive)
-      stbi__jpeg_finish(j);
-   return 1;
-}
-
-// static jfif-centered resampling (across block boundaries)
-
-typedef stbi_uc *(*resample_row_func)(stbi_uc *out, stbi_uc *in0, stbi_uc *in1,
-                                    int w, int hs);
-
-#define stbi__div4(x) ((stbi_uc) ((x) >> 2))
-
-static stbi_uc *resample_row_1(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   STBI_NOTUSED(out);
-   STBI_NOTUSED(in_far);
-   STBI_NOTUSED(w);
-   STBI_NOTUSED(hs);
-   return in_near;
-}
-
-static stbi_uc* stbi__resample_row_v_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate two samples vertically for every one in input
-   int i;
-   STBI_NOTUSED(hs);
-   for (i=0; i < w; ++i)
-      out[i] = stbi__div4(3*in_near[i] + in_far[i] + 2);
-   return out;
-}
-
-static stbi_uc*  stbi__resample_row_h_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate two samples horizontally for every one in input
-   int i;
-   stbi_uc *input = in_near;
-
-   if (w == 1) {
-      // if only one sample, can't do any interpolation
-      out[0] = out[1] = input[0];
-      return out;
-   }
-
-   out[0] = input[0];
-   out[1] = stbi__div4(input[0]*3 + input[1] + 2);
-   for (i=1; i < w-1; ++i) {
-      int n = 3*input[i]+2;
-      out[i*2+0] = stbi__div4(n+input[i-1]);
-      out[i*2+1] = stbi__div4(n+input[i+1]);
-   }
-   out[i*2+0] = stbi__div4(input[w-2]*3 + input[w-1] + 2);
-   out[i*2+1] = input[w-1];
-
-   STBI_NOTUSED(in_far);
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-
-#define stbi__div16(x) ((stbi_uc) ((x) >> 4))
-
-static stbi_uc *stbi__resample_row_hv_2(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate 2x2 samples for every one in input
-   int i,t0,t1;
-   if (w == 1) {
-      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
-      return out;
-   }
-
-   t1 = 3*in_near[0] + in_far[0];
-   out[0] = stbi__div4(t1+2);
-   for (i=1; i < w; ++i) {
-      t0 = t1;
-      t1 = 3*in_near[i]+in_far[i];
-      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
-      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
-   }
-   out[w*2-1] = stbi__div4(t1+2);
-
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static stbi_uc *stbi__resample_row_hv_2_simd(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // need to generate 2x2 samples for every one in input
-   int i=0,t0,t1;
-
-   if (w == 1) {
-      out[0] = out[1] = stbi__div4(3*in_near[0] + in_far[0] + 2);
-      return out;
-   }
-
-   t1 = 3*in_near[0] + in_far[0];
-   // process groups of 8 pixels for as long as we can.
-   // note we can't handle the last pixel in a row in this loop
-   // because we need to handle the filter boundary conditions.
-   for (; i < ((w-1) & ~7); i += 8) {
-#if defined(STBI_SSE2)
-      // load and perform the vertical filtering pass
-      // this uses 3*x + y = 4*x + (y - x)
-      __m128i zero  = _mm_setzero_si128();
-      __m128i farb  = _mm_loadl_epi64((__m128i *) (in_far + i));
-      __m128i nearb = _mm_loadl_epi64((__m128i *) (in_near + i));
-      __m128i farw  = _mm_unpacklo_epi8(farb, zero);
-      __m128i nearw = _mm_unpacklo_epi8(nearb, zero);
-      __m128i diff  = _mm_sub_epi16(farw, nearw);
-      __m128i nears = _mm_slli_epi16(nearw, 2);
-      __m128i curr  = _mm_add_epi16(nears, diff); // current row
-
-      // horizontal filter works the same based on shifted vers of current
-      // row. "prev" is current row shifted right by 1 pixel; we need to
-      // insert the previous pixel value (from t1).
-      // "next" is current row shifted left by 1 pixel, with first pixel
-      // of next block of 8 pixels added in.
-      __m128i prv0 = _mm_slli_si128(curr, 2);
-      __m128i nxt0 = _mm_srli_si128(curr, 2);
-      __m128i prev = _mm_insert_epi16(prv0, t1, 0);
-      __m128i next = _mm_insert_epi16(nxt0, 3*in_near[i+8] + in_far[i+8], 7);
-
-      // horizontal filter, polyphase implementation since it's convenient:
-      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
-      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
-      // note the shared term.
-      __m128i bias  = _mm_set1_epi16(8);
-      __m128i curs = _mm_slli_epi16(curr, 2);
-      __m128i prvd = _mm_sub_epi16(prev, curr);
-      __m128i nxtd = _mm_sub_epi16(next, curr);
-      __m128i curb = _mm_add_epi16(curs, bias);
-      __m128i even = _mm_add_epi16(prvd, curb);
-      __m128i odd  = _mm_add_epi16(nxtd, curb);
-
-      // interleave even and odd pixels, then undo scaling.
-      __m128i int0 = _mm_unpacklo_epi16(even, odd);
-      __m128i int1 = _mm_unpackhi_epi16(even, odd);
-      __m128i de0  = _mm_srli_epi16(int0, 4);
-      __m128i de1  = _mm_srli_epi16(int1, 4);
-
-      // pack and write output
-      __m128i outv = _mm_packus_epi16(de0, de1);
-      _mm_storeu_si128((__m128i *) (out + i*2), outv);
-#elif defined(STBI_NEON)
-      // load and perform the vertical filtering pass
-      // this uses 3*x + y = 4*x + (y - x)
-      uint8x8_t farb  = vld1_u8(in_far + i);
-      uint8x8_t nearb = vld1_u8(in_near + i);
-      int16x8_t diff  = vreinterpretq_s16_u16(vsubl_u8(farb, nearb));
-      int16x8_t nears = vreinterpretq_s16_u16(vshll_n_u8(nearb, 2));
-      int16x8_t curr  = vaddq_s16(nears, diff); // current row
-
-      // horizontal filter works the same based on shifted vers of current
-      // row. "prev" is current row shifted right by 1 pixel; we need to
-      // insert the previous pixel value (from t1).
-      // "next" is current row shifted left by 1 pixel, with first pixel
-      // of next block of 8 pixels added in.
-      int16x8_t prv0 = vextq_s16(curr, curr, 7);
-      int16x8_t nxt0 = vextq_s16(curr, curr, 1);
-      int16x8_t prev = vsetq_lane_s16(t1, prv0, 0);
-      int16x8_t next = vsetq_lane_s16(3*in_near[i+8] + in_far[i+8], nxt0, 7);
-
-      // horizontal filter, polyphase implementation since it's convenient:
-      // even pixels = 3*cur + prev = cur*4 + (prev - cur)
-      // odd  pixels = 3*cur + next = cur*4 + (next - cur)
-      // note the shared term.
-      int16x8_t curs = vshlq_n_s16(curr, 2);
-      int16x8_t prvd = vsubq_s16(prev, curr);
-      int16x8_t nxtd = vsubq_s16(next, curr);
-      int16x8_t even = vaddq_s16(curs, prvd);
-      int16x8_t odd  = vaddq_s16(curs, nxtd);
-
-      // undo scaling and round, then store with even/odd phases interleaved
-      uint8x8x2_t o;
-      o.val[0] = vqrshrun_n_s16(even, 4);
-      o.val[1] = vqrshrun_n_s16(odd,  4);
-      vst2_u8(out + i*2, o);
-#endif
-
-      // "previous" value for next iter
-      t1 = 3*in_near[i+7] + in_far[i+7];
-   }
-
-   t0 = t1;
-   t1 = 3*in_near[i] + in_far[i];
-   out[i*2] = stbi__div16(3*t1 + t0 + 8);
-
-   for (++i; i < w; ++i) {
-      t0 = t1;
-      t1 = 3*in_near[i]+in_far[i];
-      out[i*2-1] = stbi__div16(3*t0 + t1 + 8);
-      out[i*2  ] = stbi__div16(3*t1 + t0 + 8);
-   }
-   out[w*2-1] = stbi__div4(t1+2);
-
-   STBI_NOTUSED(hs);
-
-   return out;
-}
-#endif
-
-static stbi_uc *stbi__resample_row_generic(stbi_uc *out, stbi_uc *in_near, stbi_uc *in_far, int w, int hs)
-{
-   // resample with nearest-neighbor
-   int i,j;
-   STBI_NOTUSED(in_far);
-   for (i=0; i < w; ++i)
-      for (j=0; j < hs; ++j)
-         out[i*hs+j] = in_near[i];
-   return out;
-}
-
-// this is a reduced-precision calculation of YCbCr-to-RGB introduced
-// to make sure the code produces the same results in both SIMD and scalar
-#define stbi__float2fixed(x)  (((int) ((x) * 4096.0f + 0.5f)) << 8)
-static void stbi__YCbCr_to_RGB_row(stbi_uc *out, const stbi_uc *y, const stbi_uc *pcb, const stbi_uc *pcr, int count, int step)
-{
-   int i;
-   for (i=0; i < count; ++i) {
-      int y_fixed = (y[i] << 20) + (1<<19); // rounding
-      int r,g,b;
-      int cr = pcr[i] - 128;
-      int cb = pcb[i] - 128;
-      r = y_fixed +  cr* stbi__float2fixed(1.40200f);
-      g = y_fixed + (cr*-stbi__float2fixed(0.71414f)) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
-      b = y_fixed                                     +   cb* stbi__float2fixed(1.77200f);
-      r >>= 20;
-      g >>= 20;
-      b >>= 20;
-      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
-      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
-      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
-      out[0] = (stbi_uc)r;
-      out[1] = (stbi_uc)g;
-      out[2] = (stbi_uc)b;
-      out[3] = 255;
-      out += step;
-   }
-}
-
-#if defined(STBI_SSE2) || defined(STBI_NEON)
-static void stbi__YCbCr_to_RGB_simd(stbi_uc *out, stbi_uc const *y, stbi_uc const *pcb, stbi_uc const *pcr, int count, int step)
-{
-   int i = 0;
-
-#ifdef STBI_SSE2
-   // step == 3 is pretty ugly on the final interleave, and i'm not convinced
-   // it's useful in practice (you wouldn't use it for textures, for example).
-   // so just accelerate step == 4 case.
-   if (step == 4) {
-      // this is a fairly straightforward implementation and not super-optimized.
-      __m128i signflip  = _mm_set1_epi8(-0x80);
-      __m128i cr_const0 = _mm_set1_epi16(   (short) ( 1.40200f*4096.0f+0.5f));
-      __m128i cr_const1 = _mm_set1_epi16( - (short) ( 0.71414f*4096.0f+0.5f));
-      __m128i cb_const0 = _mm_set1_epi16( - (short) ( 0.34414f*4096.0f+0.5f));
-      __m128i cb_const1 = _mm_set1_epi16(   (short) ( 1.77200f*4096.0f+0.5f));
-      __m128i y_bias = _mm_set1_epi8((char) (unsigned char) 128);
-      __m128i xw = _mm_set1_epi16(255); // alpha channel
-
-      for (; i+7 < count; i += 8) {
-         // load
-         __m128i y_bytes = _mm_loadl_epi64((__m128i *) (y+i));
-         __m128i cr_bytes = _mm_loadl_epi64((__m128i *) (pcr+i));
-         __m128i cb_bytes = _mm_loadl_epi64((__m128i *) (pcb+i));
-         __m128i cr_biased = _mm_xor_si128(cr_bytes, signflip); // -128
-         __m128i cb_biased = _mm_xor_si128(cb_bytes, signflip); // -128
-
-         // unpack to short (and left-shift cr, cb by 8)
-         __m128i yw  = _mm_unpacklo_epi8(y_bias, y_bytes);
-         __m128i crw = _mm_unpacklo_epi8(_mm_setzero_si128(), cr_biased);
-         __m128i cbw = _mm_unpacklo_epi8(_mm_setzero_si128(), cb_biased);
-
-         // color transform
-         __m128i yws = _mm_srli_epi16(yw, 4);
-         __m128i cr0 = _mm_mulhi_epi16(cr_const0, crw);
-         __m128i cb0 = _mm_mulhi_epi16(cb_const0, cbw);
-         __m128i cb1 = _mm_mulhi_epi16(cbw, cb_const1);
-         __m128i cr1 = _mm_mulhi_epi16(crw, cr_const1);
-         __m128i rws = _mm_add_epi16(cr0, yws);
-         __m128i gwt = _mm_add_epi16(cb0, yws);
-         __m128i bws = _mm_add_epi16(yws, cb1);
-         __m128i gws = _mm_add_epi16(gwt, cr1);
-
-         // descale
-         __m128i rw = _mm_srai_epi16(rws, 4);
-         __m128i bw = _mm_srai_epi16(bws, 4);
-         __m128i gw = _mm_srai_epi16(gws, 4);
-
-         // back to byte, set up for transpose
-         __m128i brb = _mm_packus_epi16(rw, bw);
-         __m128i gxb = _mm_packus_epi16(gw, xw);
-
-         // transpose to interleave channels
-         __m128i t0 = _mm_unpacklo_epi8(brb, gxb);
-         __m128i t1 = _mm_unpackhi_epi8(brb, gxb);
-         __m128i o0 = _mm_unpacklo_epi16(t0, t1);
-         __m128i o1 = _mm_unpackhi_epi16(t0, t1);
-
-         // store
-         _mm_storeu_si128((__m128i *) (out + 0), o0);
-         _mm_storeu_si128((__m128i *) (out + 16), o1);
-         out += 32;
-      }
-   }
-#endif
-
-#ifdef STBI_NEON
-   // in this version, step=3 support would be easy to add. but is there demand?
-   if (step == 4) {
-      // this is a fairly straightforward implementation and not super-optimized.
-      uint8x8_t signflip = vdup_n_u8(0x80);
-      int16x8_t cr_const0 = vdupq_n_s16(   (short) ( 1.40200f*4096.0f+0.5f));
-      int16x8_t cr_const1 = vdupq_n_s16( - (short) ( 0.71414f*4096.0f+0.5f));
-      int16x8_t cb_const0 = vdupq_n_s16( - (short) ( 0.34414f*4096.0f+0.5f));
-      int16x8_t cb_const1 = vdupq_n_s16(   (short) ( 1.77200f*4096.0f+0.5f));
-
-      for (; i+7 < count; i += 8) {
-         // load
-         uint8x8_t y_bytes  = vld1_u8(y + i);
-         uint8x8_t cr_bytes = vld1_u8(pcr + i);
-         uint8x8_t cb_bytes = vld1_u8(pcb + i);
-         int8x8_t cr_biased = vreinterpret_s8_u8(vsub_u8(cr_bytes, signflip));
-         int8x8_t cb_biased = vreinterpret_s8_u8(vsub_u8(cb_bytes, signflip));
-
-         // expand to s16
-         int16x8_t yws = vreinterpretq_s16_u16(vshll_n_u8(y_bytes, 4));
-         int16x8_t crw = vshll_n_s8(cr_biased, 7);
-         int16x8_t cbw = vshll_n_s8(cb_biased, 7);
-
-         // color transform
-         int16x8_t cr0 = vqdmulhq_s16(crw, cr_const0);
-         int16x8_t cb0 = vqdmulhq_s16(cbw, cb_const0);
-         int16x8_t cr1 = vqdmulhq_s16(crw, cr_const1);
-         int16x8_t cb1 = vqdmulhq_s16(cbw, cb_const1);
-         int16x8_t rws = vaddq_s16(yws, cr0);
-         int16x8_t gws = vaddq_s16(vaddq_s16(yws, cb0), cr1);
-         int16x8_t bws = vaddq_s16(yws, cb1);
-
-         // undo scaling, round, convert to byte
-         uint8x8x4_t o;
-         o.val[0] = vqrshrun_n_s16(rws, 4);
-         o.val[1] = vqrshrun_n_s16(gws, 4);
-         o.val[2] = vqrshrun_n_s16(bws, 4);
-         o.val[3] = vdup_n_u8(255);
-
-         // store, interleaving r/g/b/a
-         vst4_u8(out, o);
-         out += 8*4;
-      }
-   }
-#endif
-
-   for (; i < count; ++i) {
-      int y_fixed = (y[i] << 20) + (1<<19); // rounding
-      int r,g,b;
-      int cr = pcr[i] - 128;
-      int cb = pcb[i] - 128;
-      r = y_fixed + cr* stbi__float2fixed(1.40200f);
-      g = y_fixed + cr*-stbi__float2fixed(0.71414f) + ((cb*-stbi__float2fixed(0.34414f)) & 0xffff0000);
-      b = y_fixed                                   +   cb* stbi__float2fixed(1.77200f);
-      r >>= 20;
-      g >>= 20;
-      b >>= 20;
-      if ((unsigned) r > 255) { if (r < 0) r = 0; else r = 255; }
-      if ((unsigned) g > 255) { if (g < 0) g = 0; else g = 255; }
-      if ((unsigned) b > 255) { if (b < 0) b = 0; else b = 255; }
-      out[0] = (stbi_uc)r;
-      out[1] = (stbi_uc)g;
-      out[2] = (stbi_uc)b;
-      out[3] = 255;
-      out += step;
-   }
-}
-#endif
-
-// set up the kernels
-static void stbi__setup_jpeg(stbi__jpeg *j)
-{
-   j->idct_block_kernel = stbi__idct_block;
-   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_row;
-   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2;
-
-#ifdef STBI_SSE2
-   if (stbi__sse2_available()) {
-      j->idct_block_kernel = stbi__idct_simd;
-      j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-      j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-   }
-#endif
-
-#ifdef STBI_NEON
-   j->idct_block_kernel = stbi__idct_simd;
-   j->YCbCr_to_RGB_kernel = stbi__YCbCr_to_RGB_simd;
-   j->resample_row_hv_2_kernel = stbi__resample_row_hv_2_simd;
-#endif
-}
-
-// clean up the temporary component buffers
-static void stbi__cleanup_jpeg(stbi__jpeg *j)
-{
-   stbi__free_jpeg_components(j, j->s->img_n, 0);
-}
-
-typedef struct
-{
-   resample_row_func resample;
-   stbi_uc *line0,*line1;
-   int hs,vs;   // expansion factor in each axis
-   int w_lores; // horizontal pixels pre-expansion
-   int ystep;   // how far through vertical expansion we are
-   int ypos;    // which pre-expansion row we're on
-} stbi__resample;
-
-// fast 0..255 * 0..255 => 0..255 rounded multiplication
-static stbi_uc stbi__blinn_8x8(stbi_uc x, stbi_uc y)
-{
-   unsigned int t = x*y + 128;
-   return (stbi_uc) ((t + (t >>8)) >> 8);
-}
-
-static stbi_uc *load_jpeg_image(stbi__jpeg *z, int *out_x, int *out_y, int *comp, int req_comp)
-{
-   int n, decode_n, is_rgb;
-   z->s->img_n = 0; // make stbi__cleanup_jpeg safe
-
-   // validate req_comp
-   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
-
-   // load a jpeg image from whichever source, but leave in YCbCr format
-   if (!stbi__decode_jpeg_image(z)) { stbi__cleanup_jpeg(z); return NULL; }
-
-   // determine actual number of components to generate
-   n = req_comp ? req_comp : z->s->img_n >= 3 ? 3 : 1;
-
-   is_rgb = z->s->img_n == 3 && (z->rgb == 3 || (z->app14_color_transform == 0 && !z->jfif));
-
-   if (z->s->img_n == 3 && n < 3 && !is_rgb)
-      decode_n = 1;
-   else
-      decode_n = z->s->img_n;
-
-   // nothing to do if no components requested; check this now to avoid
-   // accessing uninitialized coutput[0] later
-   if (decode_n <= 0) { stbi__cleanup_jpeg(z); return NULL; }
-
-   // resample and color-convert
-   {
-      int k;
-      unsigned int i,j;
-      stbi_uc *output;
-      stbi_uc *coutput[4] = { NULL, NULL, NULL, NULL };
-
-      stbi__resample res_comp[4];
-
-      for (k=0; k < decode_n; ++k) {
-         stbi__resample *r = &res_comp[k];
-
-         // allocate line buffer big enough for upsampling off the edges
-         // with upsample factor of 4
-         z->img_comp[k].linebuf = (stbi_uc *) stbi__malloc(z->s->img_x + 3);
-         if (!z->img_comp[k].linebuf) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
-         r->hs      = z->img_h_max / z->img_comp[k].h;
-         r->vs      = z->img_v_max / z->img_comp[k].v;
-         r->ystep   = r->vs >> 1;
-         r->w_lores = (z->s->img_x + r->hs-1) / r->hs;
-         r->ypos    = 0;
-         r->line0   = r->line1 = z->img_comp[k].data;
-
-         if      (r->hs == 1 && r->vs == 1) r->resample = resample_row_1;
-         else if (r->hs == 1 && r->vs == 2) r->resample = stbi__resample_row_v_2;
-         else if (r->hs == 2 && r->vs == 1) r->resample = stbi__resample_row_h_2;
-         else if (r->hs == 2 && r->vs == 2) r->resample = z->resample_row_hv_2_kernel;
-         else                               r->resample = stbi__resample_row_generic;
-      }
-
-      // can't error after this so, this is safe
-      output = (stbi_uc *) stbi__malloc_mad3(n, z->s->img_x, z->s->img_y, 1);
-      if (!output) { stbi__cleanup_jpeg(z); return stbi__errpuc("outofmem", "Out of memory"); }
-
-      // now go ahead and resample
-      for (j=0; j < z->s->img_y; ++j) {
-         stbi_uc *out = output + n * z->s->img_x * j;
-         for (k=0; k < decode_n; ++k) {
-            stbi__resample *r = &res_comp[k];
-            int y_bot = r->ystep >= (r->vs >> 1);
-            coutput[k] = r->resample(z->img_comp[k].linebuf,
-                                     y_bot ? r->line1 : r->line0,
-                                     y_bot ? r->line0 : r->line1,
-                                     r->w_lores, r->hs);
-            if (++r->ystep >= r->vs) {
-               r->ystep = 0;
-               r->line0 = r->line1;
-               if (++r->ypos < z->img_comp[k].y)
-                  r->line1 += z->img_comp[k].w2;
-            }
-         }
-         if (n >= 3) {
-            stbi_uc *y = coutput[0];
-            if (z->s->img_n == 3) {
-               if (is_rgb) {
-                  for (i=0; i < z->s->img_x; ++i) {
-                     out[0] = y[i];
-                     out[1] = coutput[1][i];
-                     out[2] = coutput[2][i];
-                     out[3] = 255;
-                     out += n;
-                  }
-               } else {
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-               }
-            } else if (z->s->img_n == 4) {
-               if (z->app14_color_transform == 0) { // CMYK
-                  for (i=0; i < z->s->img_x; ++i) {
-                     stbi_uc m = coutput[3][i];
-                     out[0] = stbi__blinn_8x8(coutput[0][i], m);
-                     out[1] = stbi__blinn_8x8(coutput[1][i], m);
-                     out[2] = stbi__blinn_8x8(coutput[2][i], m);
-                     out[3] = 255;
-                     out += n;
-                  }
-               } else if (z->app14_color_transform == 2) { // YCCK
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-                  for (i=0; i < z->s->img_x; ++i) {
-                     stbi_uc m = coutput[3][i];
-                     out[0] = stbi__blinn_8x8(255 - out[0], m);
-                     out[1] = stbi__blinn_8x8(255 - out[1], m);
-                     out[2] = stbi__blinn_8x8(255 - out[2], m);
-                     out += n;
-                  }
-               } else { // YCbCr + alpha?  Ignore the fourth channel for now
-                  z->YCbCr_to_RGB_kernel(out, y, coutput[1], coutput[2], z->s->img_x, n);
-               }
-            } else
-               for (i=0; i < z->s->img_x; ++i) {
-                  out[0] = out[1] = out[2] = y[i];
-                  out[3] = 255; // not used if n==3
-                  out += n;
-               }
-         } else {
-            if (is_rgb) {
-               if (n == 1)
-                  for (i=0; i < z->s->img_x; ++i)
-                     *out++ = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-               else {
-                  for (i=0; i < z->s->img_x; ++i, out += 2) {
-                     out[0] = stbi__compute_y(coutput[0][i], coutput[1][i], coutput[2][i]);
-                     out[1] = 255;
-                  }
-               }
-            } else if (z->s->img_n == 4 && z->app14_color_transform == 0) {
-               for (i=0; i < z->s->img_x; ++i) {
-                  stbi_uc m = coutput[3][i];
-                  stbi_uc r = stbi__blinn_8x8(coutput[0][i], m);
-                  stbi_uc g = stbi__blinn_8x8(coutput[1][i], m);
-                  stbi_uc b = stbi__blinn_8x8(coutput[2][i], m);
-                  out[0] = stbi__compute_y(r, g, b);
-                  out[1] = 255;
-                  out += n;
-               }
-            } else if (z->s->img_n == 4 && z->app14_color_transform == 2) {
-               for (i=0; i < z->s->img_x; ++i) {
-                  out[0] = stbi__blinn_8x8(255 - coutput[0][i], coutput[3][i]);
-                  out[1] = 255;
-                  out += n;
-               }
-            } else {
-               stbi_uc *y = coutput[0];
-               if (n == 1)
-                  for (i=0; i < z->s->img_x; ++i) out[i] = y[i];
-               else
-                  for (i=0; i < z->s->img_x; ++i) { *out++ = y[i]; *out++ = 255; }
-            }
-         }
-      }
-      stbi__cleanup_jpeg(z);
-      *out_x = z->s->img_x;
-      *out_y = z->s->img_y;
-      if (comp) *comp = z->s->img_n >= 3 ? 3 : 1; // report original components, not output
-      return output;
-   }
-}
-
-static void *stbi__jpeg_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   unsigned char* result;
-   stbi__jpeg* j = (stbi__jpeg*) stbi__malloc(sizeof(stbi__jpeg));
-   if (!j) return stbi__errpuc("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   STBI_NOTUSED(ri);
-   j->s = s;
-   stbi__setup_jpeg(j);
-   result = load_jpeg_image(j, x,y,comp,req_comp);
-   STBI_FREE(j);
-   return result;
-}
-
-static int stbi__jpeg_test(stbi__context *s)
-{
-   int r;
-   stbi__jpeg* j = (stbi__jpeg*)stbi__malloc(sizeof(stbi__jpeg));
-   if (!j) return stbi__err("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   j->s = s;
-   stbi__setup_jpeg(j);
-   r = stbi__decode_jpeg_header(j, STBI__SCAN_type);
-   stbi__rewind(s);
-   STBI_FREE(j);
-   return r;
-}
-
-static int stbi__jpeg_info_raw(stbi__jpeg *j, int *x, int *y, int *comp)
-{
-   if (!stbi__decode_jpeg_header(j, STBI__SCAN_header)) {
-      stbi__rewind( j->s );
-      return 0;
-   }
-   if (x) *x = j->s->img_x;
-   if (y) *y = j->s->img_y;
-   if (comp) *comp = j->s->img_n >= 3 ? 3 : 1;
-   return 1;
-}
-
-static int stbi__jpeg_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int result;
-   stbi__jpeg* j = (stbi__jpeg*) (stbi__malloc(sizeof(stbi__jpeg)));
-   if (!j) return stbi__err("outofmem", "Out of memory");
-   memset(j, 0, sizeof(stbi__jpeg));
-   j->s = s;
-   result = stbi__jpeg_info_raw(j, x, y, comp);
-   STBI_FREE(j);
-   return result;
-}
-#endif
-
-// public domain zlib decode    v0.2  Sean Barrett 2006-11-18
-//    simple implementation
-//      - all input must be provided in an upfront buffer
-//      - all output is written to a single output buffer (can malloc/realloc)
-//    performance
-//      - fast huffman
-
-#ifndef STBI_NO_ZLIB
-
-// fast-way is faster to check than jpeg huffman, but slow way is slower
-#define STBI__ZFAST_BITS  9 // accelerate all cases in default tables
-#define STBI__ZFAST_MASK  ((1 << STBI__ZFAST_BITS) - 1)
-#define STBI__ZNSYMS 288 // number of symbols in literal/length alphabet
-
-// zlib-style huffman encoding
-// (jpegs packs from left, zlib from right, so can't share code)
-typedef struct
-{
-   stbi__uint16 fast[1 << STBI__ZFAST_BITS];
-   stbi__uint16 firstcode[16];
-   int maxcode[17];
-   stbi__uint16 firstsymbol[16];
-   stbi_uc  size[STBI__ZNSYMS];
-   stbi__uint16 value[STBI__ZNSYMS];
-} stbi__zhuffman;
-
-stbi_inline static int stbi__bitreverse16(int n)
-{
-  n = ((n & 0xAAAA) >>  1) | ((n & 0x5555) << 1);
-  n = ((n & 0xCCCC) >>  2) | ((n & 0x3333) << 2);
-  n = ((n & 0xF0F0) >>  4) | ((n & 0x0F0F) << 4);
-  n = ((n & 0xFF00) >>  8) | ((n & 0x00FF) << 8);
-  return n;
-}
-
-stbi_inline static int stbi__bit_reverse(int v, int bits)
-{
-   STBI_ASSERT(bits <= 16);
-   // to bit reverse n bits, reverse 16 and shift
-   // e.g. 11 bits, bit reverse and shift away 5
-   return stbi__bitreverse16(v) >> (16-bits);
-}
-
-static int stbi__zbuild_huffman(stbi__zhuffman *z, const stbi_uc *sizelist, int num)
-{
-   int i,k=0;
-   int code, next_code[16], sizes[17];
-
-   // DEFLATE spec for generating codes
-   memset(sizes, 0, sizeof(sizes));
-   memset(z->fast, 0, sizeof(z->fast));
-   for (i=0; i < num; ++i)
-      ++sizes[sizelist[i]];
-   sizes[0] = 0;
-   for (i=1; i < 16; ++i)
-      if (sizes[i] > (1 << i))
-         return stbi__err("bad sizes", "Corrupt PNG");
-   code = 0;
-   for (i=1; i < 16; ++i) {
-      next_code[i] = code;
-      z->firstcode[i] = (stbi__uint16) code;
-      z->firstsymbol[i] = (stbi__uint16) k;
-      code = (code + sizes[i]);
-      if (sizes[i])
-         if (code-1 >= (1 << i)) return stbi__err("bad codelengths","Corrupt PNG");
-      z->maxcode[i] = code << (16-i); // preshift for inner loop
-      code <<= 1;
-      k += sizes[i];
-   }
-   z->maxcode[16] = 0x10000; // sentinel
-   for (i=0; i < num; ++i) {
-      int s = sizelist[i];
-      if (s) {
-         int c = next_code[s] - z->firstcode[s] + z->firstsymbol[s];
-         stbi__uint16 fastv = (stbi__uint16) ((s << 9) | i);
-         z->size [c] = (stbi_uc     ) s;
-         z->value[c] = (stbi__uint16) i;
-         if (s <= STBI__ZFAST_BITS) {
-            int j = stbi__bit_reverse(next_code[s],s);
-            while (j < (1 << STBI__ZFAST_BITS)) {
-               z->fast[j] = fastv;
-               j += (1 << s);
-            }
-         }
-         ++next_code[s];
-      }
-   }
-   return 1;
-}
-
-// zlib-from-memory implementation for PNG reading
-//    because PNG allows splitting the zlib stream arbitrarily,
-//    and it's annoying structurally to have PNG call ZLIB call PNG,
-//    we require PNG read all the IDATs and combine them into a single
-//    memory buffer
-
-typedef struct
-{
-   stbi_uc *zbuffer, *zbuffer_end;
-   int num_bits;
-   stbi__uint32 code_buffer;
-
-   char *zout;
-   char *zout_start;
-   char *zout_end;
-   int   z_expandable;
-
-   stbi__zhuffman z_length, z_distance;
-} stbi__zbuf;
-
-stbi_inline static int stbi__zeof(stbi__zbuf *z)
-{
-   return (z->zbuffer >= z->zbuffer_end);
-}
-
-stbi_inline static stbi_uc stbi__zget8(stbi__zbuf *z)
-{
-   return stbi__zeof(z) ? 0 : *z->zbuffer++;
-}
-
-static void stbi__fill_bits(stbi__zbuf *z)
-{
-   do {
-      if (z->code_buffer >= (1U << z->num_bits)) {
-        z->zbuffer = z->zbuffer_end;  /* treat this as EOF so we fail. */
-        return;
-      }
-      z->code_buffer |= (unsigned int) stbi__zget8(z) << z->num_bits;
-      z->num_bits += 8;
-   } while (z->num_bits <= 24);
-}
-
-stbi_inline static unsigned int stbi__zreceive(stbi__zbuf *z, int n)
-{
-   unsigned int k;
-   if (z->num_bits < n) stbi__fill_bits(z);
-   k = z->code_buffer & ((1 << n) - 1);
-   z->code_buffer >>= n;
-   z->num_bits -= n;
-   return k;
-}
-
-static int stbi__zhuffman_decode_slowpath(stbi__zbuf *a, stbi__zhuffman *z)
-{
-   int b,s,k;
-   // not resolved by fast table, so compute it the slow way
-   // use jpeg approach, which requires MSbits at top
-   k = stbi__bit_reverse(a->code_buffer, 16);
-   for (s=STBI__ZFAST_BITS+1; ; ++s)
-      if (k < z->maxcode[s])
-         break;
-   if (s >= 16) return -1; // invalid code!
-   // code size is s, so:
-   b = (k >> (16-s)) - z->firstcode[s] + z->firstsymbol[s];
-   if (b >= STBI__ZNSYMS) return -1; // some data was corrupt somewhere!
-   if (z->size[b] != s) return -1;  // was originally an assert, but report failure instead.
-   a->code_buffer >>= s;
-   a->num_bits -= s;
-   return z->value[b];
-}
-
-stbi_inline static int stbi__zhuffman_decode(stbi__zbuf *a, stbi__zhuffman *z)
-{
-   int b,s;
-   if (a->num_bits < 16) {
-      if (stbi__zeof(a)) {
-         return -1;   /* report error for unexpected end of data. */
-      }
-      stbi__fill_bits(a);
-   }
-   b = z->fast[a->code_buffer & STBI__ZFAST_MASK];
-   if (b) {
-      s = b >> 9;
-      a->code_buffer >>= s;
-      a->num_bits -= s;
-      return b & 511;
-   }
-   return stbi__zhuffman_decode_slowpath(a, z);
-}
-
-static int stbi__zexpand(stbi__zbuf *z, char *zout, int n)  // need to make room for n bytes
-{
-   char *q;
-   unsigned int cur, limit, old_limit;
-   z->zout = zout;
-   if (!z->z_expandable) return stbi__err("output buffer limit","Corrupt PNG");
-   cur   = (unsigned int) (z->zout - z->zout_start);
-   limit = old_limit = (unsigned) (z->zout_end - z->zout_start);
-   if (UINT_MAX - cur < (unsigned) n) return stbi__err("outofmem", "Out of memory");
-   while (cur + n > limit) {
-      if(limit > UINT_MAX / 2) return stbi__err("outofmem", "Out of memory");
-      limit *= 2;
-   }
-   q = (char *) STBI_REALLOC_SIZED(z->zout_start, old_limit, limit);
-   STBI_NOTUSED(old_limit);
-   if (q == NULL) return stbi__err("outofmem", "Out of memory");
-   z->zout_start = q;
-   z->zout       = q + cur;
-   z->zout_end   = q + limit;
-   return 1;
-}
-
-static const int stbi__zlength_base[31] = {
-   3,4,5,6,7,8,9,10,11,13,
-   15,17,19,23,27,31,35,43,51,59,
-   67,83,99,115,131,163,195,227,258,0,0 };
-
-static const int stbi__zlength_extra[31]=
-{ 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
-
-static const int stbi__zdist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193,
-257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
-
-static const int stbi__zdist_extra[32] =
-{ 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
-
-static int stbi__parse_huffman_block(stbi__zbuf *a)
-{
-   char *zout = a->zout;
-   for(;;) {
-      int z = stbi__zhuffman_decode(a, &a->z_length);
-      if (z < 256) {
-         if (z < 0) return stbi__err("bad huffman code","Corrupt PNG"); // error in huffman codes
-         if (zout >= a->zout_end) {
-            if (!stbi__zexpand(a, zout, 1)) return 0;
-            zout = a->zout;
-         }
-         *zout++ = (char) z;
-      } else {
-         stbi_uc *p;
-         int len,dist;
-         if (z == 256) {
-            a->zout = zout;
-            return 1;
-         }
-         if (z >= 286) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, length codes 286 and 287 must not appear in compressed data
-         z -= 257;
-         len = stbi__zlength_base[z];
-         if (stbi__zlength_extra[z]) len += stbi__zreceive(a, stbi__zlength_extra[z]);
-         z = stbi__zhuffman_decode(a, &a->z_distance);
-         if (z < 0 || z >= 30) return stbi__err("bad huffman code","Corrupt PNG"); // per DEFLATE, distance codes 30 and 31 must not appear in compressed data
-         dist = stbi__zdist_base[z];
-         if (stbi__zdist_extra[z]) dist += stbi__zreceive(a, stbi__zdist_extra[z]);
-         if (zout - a->zout_start < dist) return stbi__err("bad dist","Corrupt PNG");
-         if (zout + len > a->zout_end) {
-            if (!stbi__zexpand(a, zout, len)) return 0;
-            zout = a->zout;
-         }
-         p = (stbi_uc *) (zout - dist);
-         if (dist == 1) { // run of one byte; common in images.
-            stbi_uc v = *p;
-            if (len) { do *zout++ = v; while (--len); }
-         } else {
-            if (len) { do *zout++ = *p++; while (--len); }
-         }
-      }
-   }
-}
-
-static int stbi__compute_huffman_codes(stbi__zbuf *a)
-{
-   static const stbi_uc length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
-   stbi__zhuffman z_codelength;
-   stbi_uc lencodes[286+32+137];//padding for maximum single op
-   stbi_uc codelength_sizes[19];
-   int i,n;
-
-   int hlit  = stbi__zreceive(a,5) + 257;
-   int hdist = stbi__zreceive(a,5) + 1;
-   int hclen = stbi__zreceive(a,4) + 4;
-   int ntot  = hlit + hdist;
-
-   memset(codelength_sizes, 0, sizeof(codelength_sizes));
-   for (i=0; i < hclen; ++i) {
-      int s = stbi__zreceive(a,3);
-      codelength_sizes[length_dezigzag[i]] = (stbi_uc) s;
-   }
-   if (!stbi__zbuild_huffman(&z_codelength, codelength_sizes, 19)) return 0;
-
-   n = 0;
-   while (n < ntot) {
-      int c = stbi__zhuffman_decode(a, &z_codelength);
-      if (c < 0 || c >= 19) return stbi__err("bad codelengths", "Corrupt PNG");
-      if (c < 16)
-         lencodes[n++] = (stbi_uc) c;
-      else {
-         stbi_uc fill = 0;
-         if (c == 16) {
-            c = stbi__zreceive(a,2)+3;
-            if (n == 0) return stbi__err("bad codelengths", "Corrupt PNG");
-            fill = lencodes[n-1];
-         } else if (c == 17) {
-            c = stbi__zreceive(a,3)+3;
-         } else if (c == 18) {
-            c = stbi__zreceive(a,7)+11;
-         } else {
-            return stbi__err("bad codelengths", "Corrupt PNG");
-         }
-         if (ntot - n < c) return stbi__err("bad codelengths", "Corrupt PNG");
-         memset(lencodes+n, fill, c);
-         n += c;
-      }
-   }
-   if (n != ntot) return stbi__err("bad codelengths","Corrupt PNG");
-   if (!stbi__zbuild_huffman(&a->z_length, lencodes, hlit)) return 0;
-   if (!stbi__zbuild_huffman(&a->z_distance, lencodes+hlit, hdist)) return 0;
-   return 1;
-}
-
-static int stbi__parse_uncompressed_block(stbi__zbuf *a)
-{
-   stbi_uc header[4];
-   int len,nlen,k;
-   if (a->num_bits & 7)
-      stbi__zreceive(a, a->num_bits & 7); // discard
-   // drain the bit-packed data into header
-   k = 0;
-   while (a->num_bits > 0) {
-      header[k++] = (stbi_uc) (a->code_buffer & 255); // suppress MSVC run-time check
-      a->code_buffer >>= 8;
-      a->num_bits -= 8;
-   }
-   if (a->num_bits < 0) return stbi__err("zlib corrupt","Corrupt PNG");
-   // now fill header the normal way
-   while (k < 4)
-      header[k++] = stbi__zget8(a);
-   len  = header[1] * 256 + header[0];
-   nlen = header[3] * 256 + header[2];
-   if (nlen != (len ^ 0xffff)) return stbi__err("zlib corrupt","Corrupt PNG");
-   if (a->zbuffer + len > a->zbuffer_end) return stbi__err("read past buffer","Corrupt PNG");
-   if (a->zout + len > a->zout_end)
-      if (!stbi__zexpand(a, a->zout, len)) return 0;
-   memcpy(a->zout, a->zbuffer, len);
-   a->zbuffer += len;
-   a->zout += len;
-   return 1;
-}
-
-static int stbi__parse_zlib_header(stbi__zbuf *a)
-{
-   int cmf   = stbi__zget8(a);
-   int cm    = cmf & 15;
-   /* int cinfo = cmf >> 4; */
-   int flg   = stbi__zget8(a);
-   if (stbi__zeof(a)) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
-   if ((cmf*256+flg) % 31 != 0) return stbi__err("bad zlib header","Corrupt PNG"); // zlib spec
-   if (flg & 32) return stbi__err("no preset dict","Corrupt PNG"); // preset dictionary not allowed in png
-   if (cm != 8) return stbi__err("bad compression","Corrupt PNG"); // DEFLATE required for png
-   // window = 1 << (8 + cinfo)... but who cares, we fully buffer output
-   return 1;
-}
-
-static const stbi_uc stbi__zdefault_length[STBI__ZNSYMS] =
-{
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,
-   8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,
-   9,9,9,9,9,9,9,9,9,9,9,9,9,9,9,9, 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, 7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8
-};
-static const stbi_uc stbi__zdefault_distance[32] =
-{
-   5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5
-};
-/*
-Init algorithm:
-{
-   int i;   // use <= to match clearly with spec
-   for (i=0; i <= 143; ++i)     stbi__zdefault_length[i]   = 8;
-   for (   ; i <= 255; ++i)     stbi__zdefault_length[i]   = 9;
-   for (   ; i <= 279; ++i)     stbi__zdefault_length[i]   = 7;
-   for (   ; i <= 287; ++i)     stbi__zdefault_length[i]   = 8;
-
-   for (i=0; i <=  31; ++i)     stbi__zdefault_distance[i] = 5;
-}
-*/
-
-static int stbi__parse_zlib(stbi__zbuf *a, int parse_header)
-{
-   int final, type;
-   if (parse_header)
-      if (!stbi__parse_zlib_header(a)) return 0;
-   a->num_bits = 0;
-   a->code_buffer = 0;
-   do {
-      final = stbi__zreceive(a,1);
-      type = stbi__zreceive(a,2);
-      if (type == 0) {
-         if (!stbi__parse_uncompressed_block(a)) return 0;
-      } else if (type == 3) {
-         return 0;
-      } else {
-         if (type == 1) {
-            // use fixed code lengths
-            if (!stbi__zbuild_huffman(&a->z_length  , stbi__zdefault_length  , STBI__ZNSYMS)) return 0;
-            if (!stbi__zbuild_huffman(&a->z_distance, stbi__zdefault_distance,  32)) return 0;
-         } else {
-            if (!stbi__compute_huffman_codes(a)) return 0;
-         }
-         if (!stbi__parse_huffman_block(a)) return 0;
-      }
-   } while (!final);
-   return 1;
-}
-
-static int stbi__do_zlib(stbi__zbuf *a, char *obuf, int olen, int exp, int parse_header)
-{
-   a->zout_start = obuf;
-   a->zout       = obuf;
-   a->zout_end   = obuf + olen;
-   a->z_expandable = exp;
-
-   return stbi__parse_zlib(a, parse_header);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize(const char *buffer, int len, int initial_size, int *outlen)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(initial_size);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer + len;
-   if (stbi__do_zlib(&a, p, initial_size, 1, 1)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF char *stbi_zlib_decode_malloc(char const *buffer, int len, int *outlen)
-{
-   return stbi_zlib_decode_malloc_guesssize(buffer, len, 16384, outlen);
-}
-
-STBIDEF char *stbi_zlib_decode_malloc_guesssize_headerflag(const char *buffer, int len, int initial_size, int *outlen, int parse_header)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(initial_size);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer + len;
-   if (stbi__do_zlib(&a, p, initial_size, 1, parse_header)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF int stbi_zlib_decode_buffer(char *obuffer, int olen, char const *ibuffer, int ilen)
-{
-   stbi__zbuf a;
-   a.zbuffer = (stbi_uc *) ibuffer;
-   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
-   if (stbi__do_zlib(&a, obuffer, olen, 0, 1))
-      return (int) (a.zout - a.zout_start);
-   else
-      return -1;
-}
-
-STBIDEF char *stbi_zlib_decode_noheader_malloc(char const *buffer, int len, int *outlen)
-{
-   stbi__zbuf a;
-   char *p = (char *) stbi__malloc(16384);
-   if (p == NULL) return NULL;
-   a.zbuffer = (stbi_uc *) buffer;
-   a.zbuffer_end = (stbi_uc *) buffer+len;
-   if (stbi__do_zlib(&a, p, 16384, 1, 0)) {
-      if (outlen) *outlen = (int) (a.zout - a.zout_start);
-      return a.zout_start;
-   } else {
-      STBI_FREE(a.zout_start);
-      return NULL;
-   }
-}
-
-STBIDEF int stbi_zlib_decode_noheader_buffer(char *obuffer, int olen, const char *ibuffer, int ilen)
-{
-   stbi__zbuf a;
-   a.zbuffer = (stbi_uc *) ibuffer;
-   a.zbuffer_end = (stbi_uc *) ibuffer + ilen;
-   if (stbi__do_zlib(&a, obuffer, olen, 0, 0))
-      return (int) (a.zout - a.zout_start);
-   else
-      return -1;
-}
-#endif
-
-// public domain "baseline" PNG decoder   v0.10  Sean Barrett 2006-11-18
-//    simple implementation
-//      - only 8-bit samples
-//      - no CRC checking
-//      - allocates lots of intermediate memory
-//        - avoids problem of streaming data between subsystems
-//        - avoids explicit window management
-//    performance
-//      - uses stb_zlib, a PD zlib implementation with fast huffman decoding
-
-#ifndef STBI_NO_PNG
-typedef struct
-{
-   stbi__uint32 length;
-   stbi__uint32 type;
-} stbi__pngchunk;
-
-static stbi__pngchunk stbi__get_chunk_header(stbi__context *s)
-{
-   stbi__pngchunk c;
-   c.length = stbi__get32be(s);
-   c.type   = stbi__get32be(s);
-   return c;
-}
-
-static int stbi__check_png_header(stbi__context *s)
-{
-   static const stbi_uc png_sig[8] = { 137,80,78,71,13,10,26,10 };
-   int i;
-   for (i=0; i < 8; ++i)
-      if (stbi__get8(s) != png_sig[i]) return stbi__err("bad png sig","Not a PNG");
-   return 1;
-}
-
-typedef struct
-{
-   stbi__context *s;
-   stbi_uc *idata, *expanded, *out;
-   int depth;
-} stbi__png;
-
-
-enum {
-   STBI__F_none=0,
-   STBI__F_sub=1,
-   STBI__F_up=2,
-   STBI__F_avg=3,
-   STBI__F_paeth=4,
-   // synthetic filters used for first scanline to avoid needing a dummy row of 0s
-   STBI__F_avg_first,
-   STBI__F_paeth_first
-};
-
-static stbi_uc first_row_filter[5] =
-{
-   STBI__F_none,
-   STBI__F_sub,
-   STBI__F_none,
-   STBI__F_avg_first,
-   STBI__F_paeth_first
-};
-
-static int stbi__paeth(int a, int b, int c)
-{
-   int p = a + b - c;
-   int pa = abs(p-a);
-   int pb = abs(p-b);
-   int pc = abs(p-c);
-   if (pa <= pb && pa <= pc) return a;
-   if (pb <= pc) return b;
-   return c;
-}
-
-static const stbi_uc stbi__depth_scale_table[9] = { 0, 0xff, 0x55, 0, 0x11, 0,0,0, 0x01 };
-
-// create the png data from post-deflated data
-static int stbi__create_png_image_raw(stbi__png *a, stbi_uc *raw, stbi__uint32 raw_len, int out_n, stbi__uint32 x, stbi__uint32 y, int depth, int color)
-{
-   int bytes = (depth == 16? 2 : 1);
-   stbi__context *s = a->s;
-   stbi__uint32 i,j,stride = x*out_n*bytes;
-   stbi__uint32 img_len, img_width_bytes;
-   int k;
-   int img_n = s->img_n; // copy it into a local for later
-
-   int output_bytes = out_n*bytes;
-   int filter_bytes = img_n*bytes;
-   int width = x;
-
-   STBI_ASSERT(out_n == s->img_n || out_n == s->img_n+1);
-   a->out = (stbi_uc *) stbi__malloc_mad3(x, y, output_bytes, 0); // extra bytes to write off the end into
-   if (!a->out) return stbi__err("outofmem", "Out of memory");
-
-   if (!stbi__mad3sizes_valid(img_n, x, depth, 7)) return stbi__err("too large", "Corrupt PNG");
-   img_width_bytes = (((img_n * x * depth) + 7) >> 3);
-   img_len = (img_width_bytes + 1) * y;
-
-   // we used to check for exact match between raw_len and img_len on non-interlaced PNGs,
-   // but issue #276 reported a PNG in the wild that had extra data at the end (all zeros),
-   // so just check for raw_len < img_len always.
-   if (raw_len < img_len) return stbi__err("not enough pixels","Corrupt PNG");
-
-   for (j=0; j < y; ++j) {
-      stbi_uc *cur = a->out + stride*j;
-      stbi_uc *prior;
-      int filter = *raw++;
-
-      if (filter > 4)
-         return stbi__err("invalid filter","Corrupt PNG");
-
-      if (depth < 8) {
-         if (img_width_bytes > x) return stbi__err("invalid width","Corrupt PNG");
-         cur += x*out_n - img_width_bytes; // store output to the rightmost img_len bytes, so we can decode in place
-         filter_bytes = 1;
-         width = img_width_bytes;
-      }
-      prior = cur - stride; // bugfix: need to compute this after 'cur +=' computation above
-
-      // if first row, use special filter that doesn't sample previous row
-      if (j == 0) filter = first_row_filter[filter];
-
-      // handle first byte explicitly
-      for (k=0; k < filter_bytes; ++k) {
-         switch (filter) {
-            case STBI__F_none       : cur[k] = raw[k]; break;
-            case STBI__F_sub        : cur[k] = raw[k]; break;
-            case STBI__F_up         : cur[k] = STBI__BYTECAST(raw[k] + prior[k]); break;
-            case STBI__F_avg        : cur[k] = STBI__BYTECAST(raw[k] + (prior[k]>>1)); break;
-            case STBI__F_paeth      : cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(0,prior[k],0)); break;
-            case STBI__F_avg_first  : cur[k] = raw[k]; break;
-            case STBI__F_paeth_first: cur[k] = raw[k]; break;
-         }
-      }
-
-      if (depth == 8) {
-         if (img_n != out_n)
-            cur[img_n] = 255; // first pixel
-         raw += img_n;
-         cur += out_n;
-         prior += out_n;
-      } else if (depth == 16) {
-         if (img_n != out_n) {
-            cur[filter_bytes]   = 255; // first pixel top byte
-            cur[filter_bytes+1] = 255; // first pixel bottom byte
-         }
-         raw += filter_bytes;
-         cur += output_bytes;
-         prior += output_bytes;
-      } else {
-         raw += 1;
-         cur += 1;
-         prior += 1;
-      }
-
-      // this is a little gross, so that we don't switch per-pixel or per-component
-      if (depth < 8 || img_n == out_n) {
-         int nk = (width - 1)*filter_bytes;
-         #define STBI__CASE(f) \
-             case f:     \
-                for (k=0; k < nk; ++k)
-         switch (filter) {
-            // "none" filter turns into a memcpy here; make that explicit.
-            case STBI__F_none:         memcpy(cur, raw, nk); break;
-            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k-filter_bytes]); } break;
-            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
-            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k-filter_bytes])>>1)); } break;
-            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],prior[k],prior[k-filter_bytes])); } break;
-            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k-filter_bytes] >> 1)); } break;
-            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k-filter_bytes],0,0)); } break;
-         }
-         #undef STBI__CASE
-         raw += nk;
-      } else {
-         STBI_ASSERT(img_n+1 == out_n);
-         #define STBI__CASE(f) \
-             case f:     \
-                for (i=x-1; i >= 1; --i, cur[filter_bytes]=255,raw+=filter_bytes,cur+=output_bytes,prior+=output_bytes) \
-                   for (k=0; k < filter_bytes; ++k)
-         switch (filter) {
-            STBI__CASE(STBI__F_none)         { cur[k] = raw[k]; } break;
-            STBI__CASE(STBI__F_sub)          { cur[k] = STBI__BYTECAST(raw[k] + cur[k- output_bytes]); } break;
-            STBI__CASE(STBI__F_up)           { cur[k] = STBI__BYTECAST(raw[k] + prior[k]); } break;
-            STBI__CASE(STBI__F_avg)          { cur[k] = STBI__BYTECAST(raw[k] + ((prior[k] + cur[k- output_bytes])>>1)); } break;
-            STBI__CASE(STBI__F_paeth)        { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],prior[k],prior[k- output_bytes])); } break;
-            STBI__CASE(STBI__F_avg_first)    { cur[k] = STBI__BYTECAST(raw[k] + (cur[k- output_bytes] >> 1)); } break;
-            STBI__CASE(STBI__F_paeth_first)  { cur[k] = STBI__BYTECAST(raw[k] + stbi__paeth(cur[k- output_bytes],0,0)); } break;
-         }
-         #undef STBI__CASE
-
-         // the loop above sets the high byte of the pixels' alpha, but for
-         // 16 bit png files we also need the low byte set. we'll do that here.
-         if (depth == 16) {
-            cur = a->out + stride*j; // start at the beginning of the row again
-            for (i=0; i < x; ++i,cur+=output_bytes) {
-               cur[filter_bytes+1] = 255;
-            }
-         }
-      }
-   }
-
-   // we make a separate pass to expand bits to pixels; for performance,
-   // this could run two scanlines behind the above code, so it won't
-   // intefere with filtering but will still be in the cache.
-   if (depth < 8) {
-      for (j=0; j < y; ++j) {
-         stbi_uc *cur = a->out + stride*j;
-         stbi_uc *in  = a->out + stride*j + x*out_n - img_width_bytes;
-         // unpack 1/2/4-bit into a 8-bit buffer. allows us to keep the common 8-bit path optimal at minimal cost for 1/2/4-bit
-         // png guarante byte alignment, if width is not multiple of 8/4/2 we'll decode dummy trailing data that will be skipped in the later loop
-         stbi_uc scale = (color == 0) ? stbi__depth_scale_table[depth] : 1; // scale grayscale values to 0..255 range
-
-         // note that the final byte might overshoot and write more data than desired.
-         // we can allocate enough data that this never writes out of memory, but it
-         // could also overwrite the next scanline. can it overwrite non-empty data
-         // on the next scanline? yes, consider 1-pixel-wide scanlines with 1-bit-per-pixel.
-         // so we need to explicitly clamp the final ones
-
-         if (depth == 4) {
-            for (k=x*img_n; k >= 2; k-=2, ++in) {
-               *cur++ = scale * ((*in >> 4)       );
-               *cur++ = scale * ((*in     ) & 0x0f);
-            }
-            if (k > 0) *cur++ = scale * ((*in >> 4)       );
-         } else if (depth == 2) {
-            for (k=x*img_n; k >= 4; k-=4, ++in) {
-               *cur++ = scale * ((*in >> 6)       );
-               *cur++ = scale * ((*in >> 4) & 0x03);
-               *cur++ = scale * ((*in >> 2) & 0x03);
-               *cur++ = scale * ((*in     ) & 0x03);
-            }
-            if (k > 0) *cur++ = scale * ((*in >> 6)       );
-            if (k > 1) *cur++ = scale * ((*in >> 4) & 0x03);
-            if (k > 2) *cur++ = scale * ((*in >> 2) & 0x03);
-         } else if (depth == 1) {
-            for (k=x*img_n; k >= 8; k-=8, ++in) {
-               *cur++ = scale * ((*in >> 7)       );
-               *cur++ = scale * ((*in >> 6) & 0x01);
-               *cur++ = scale * ((*in >> 5) & 0x01);
-               *cur++ = scale * ((*in >> 4) & 0x01);
-               *cur++ = scale * ((*in >> 3) & 0x01);
-               *cur++ = scale * ((*in >> 2) & 0x01);
-               *cur++ = scale * ((*in >> 1) & 0x01);
-               *cur++ = scale * ((*in     ) & 0x01);
-            }
-            if (k > 0) *cur++ = scale * ((*in >> 7)       );
-            if (k > 1) *cur++ = scale * ((*in >> 6) & 0x01);
-            if (k > 2) *cur++ = scale * ((*in >> 5) & 0x01);
-            if (k > 3) *cur++ = scale * ((*in >> 4) & 0x01);
-            if (k > 4) *cur++ = scale * ((*in >> 3) & 0x01);
-            if (k > 5) *cur++ = scale * ((*in >> 2) & 0x01);
-            if (k > 6) *cur++ = scale * ((*in >> 1) & 0x01);
-         }
-         if (img_n != out_n) {
-            int q;
-            // insert alpha = 255
-            cur = a->out + stride*j;
-            if (img_n == 1) {
-               for (q=x-1; q >= 0; --q) {
-                  cur[q*2+1] = 255;
-                  cur[q*2+0] = cur[q];
-               }
-            } else {
-               STBI_ASSERT(img_n == 3);
-               for (q=x-1; q >= 0; --q) {
-                  cur[q*4+3] = 255;
-                  cur[q*4+2] = cur[q*3+2];
-                  cur[q*4+1] = cur[q*3+1];
-                  cur[q*4+0] = cur[q*3+0];
-               }
-            }
-         }
-      }
-   } else if (depth == 16) {
-      // force the image data from big-endian to platform-native.
-      // this is done in a separate pass due to the decoding relying
-      // on the data being untouched, but could probably be done
-      // per-line during decode if care is taken.
-      stbi_uc *cur = a->out;
-      stbi__uint16 *cur16 = (stbi__uint16*)cur;
-
-      for(i=0; i < x*y*out_n; ++i,cur16++,cur+=2) {
-         *cur16 = (cur[0] << 8) | cur[1];
-      }
-   }
-
-   return 1;
-}
-
-static int stbi__create_png_image(stbi__png *a, stbi_uc *image_data, stbi__uint32 image_data_len, int out_n, int depth, int color, int interlaced)
-{
-   int bytes = (depth == 16 ? 2 : 1);
-   int out_bytes = out_n * bytes;
-   stbi_uc *final;
-   int p;
-   if (!interlaced)
-      return stbi__create_png_image_raw(a, image_data, image_data_len, out_n, a->s->img_x, a->s->img_y, depth, color);
-
-   // de-interlacing
-   final = (stbi_uc *) stbi__malloc_mad3(a->s->img_x, a->s->img_y, out_bytes, 0);
-   if (!final) return stbi__err("outofmem", "Out of memory");
-   for (p=0; p < 7; ++p) {
-      int xorig[] = { 0,4,0,2,0,1,0 };
-      int yorig[] = { 0,0,4,0,2,0,1 };
-      int xspc[]  = { 8,8,4,4,2,2,1 };
-      int yspc[]  = { 8,8,8,4,4,2,2 };
-      int i,j,x,y;
-      // pass1_x[4] = 0, pass1_x[5] = 1, pass1_x[12] = 1
-      x = (a->s->img_x - xorig[p] + xspc[p]-1) / xspc[p];
-      y = (a->s->img_y - yorig[p] + yspc[p]-1) / yspc[p];
-      if (x && y) {
-         stbi__uint32 img_len = ((((a->s->img_n * x * depth) + 7) >> 3) + 1) * y;
-         if (!stbi__create_png_image_raw(a, image_data, image_data_len, out_n, x, y, depth, color)) {
-            STBI_FREE(final);
-            return 0;
-         }
-         for (j=0; j < y; ++j) {
-            for (i=0; i < x; ++i) {
-               int out_y = j*yspc[p]+yorig[p];
-               int out_x = i*xspc[p]+xorig[p];
-               memcpy(final + out_y*a->s->img_x*out_bytes + out_x*out_bytes,
-                      a->out + (j*x+i)*out_bytes, out_bytes);
-            }
-         }
-         STBI_FREE(a->out);
-         image_data += img_len;
-         image_data_len -= img_len;
-      }
-   }
-   a->out = final;
-
-   return 1;
-}
-
-static int stbi__compute_transparency(stbi__png *z, stbi_uc tc[3], int out_n)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi_uc *p = z->out;
-
-   // compute color-based transparency, assuming we've
-   // already got 255 as the alpha value in the output
-   STBI_ASSERT(out_n == 2 || out_n == 4);
-
-   if (out_n == 2) {
-      for (i=0; i < pixel_count; ++i) {
-         p[1] = (p[0] == tc[0] ? 0 : 255);
-         p += 2;
-      }
-   } else {
-      for (i=0; i < pixel_count; ++i) {
-         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-            p[3] = 0;
-         p += 4;
-      }
-   }
-   return 1;
-}
-
-static int stbi__compute_transparency16(stbi__png *z, stbi__uint16 tc[3], int out_n)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi__uint16 *p = (stbi__uint16*) z->out;
-
-   // compute color-based transparency, assuming we've
-   // already got 65535 as the alpha value in the output
-   STBI_ASSERT(out_n == 2 || out_n == 4);
-
-   if (out_n == 2) {
-      for (i = 0; i < pixel_count; ++i) {
-         p[1] = (p[0] == tc[0] ? 0 : 65535);
-         p += 2;
-      }
-   } else {
-      for (i = 0; i < pixel_count; ++i) {
-         if (p[0] == tc[0] && p[1] == tc[1] && p[2] == tc[2])
-            p[3] = 0;
-         p += 4;
-      }
-   }
-   return 1;
-}
-
-static int stbi__expand_png_palette(stbi__png *a, stbi_uc *palette, int len, int pal_img_n)
-{
-   stbi__uint32 i, pixel_count = a->s->img_x * a->s->img_y;
-   stbi_uc *p, *temp_out, *orig = a->out;
-
-   p = (stbi_uc *) stbi__malloc_mad2(pixel_count, pal_img_n, 0);
-   if (p == NULL) return stbi__err("outofmem", "Out of memory");
-
-   // between here and free(out) below, exitting would leak
-   temp_out = p;
-
-   if (pal_img_n == 3) {
-      for (i=0; i < pixel_count; ++i) {
-         int n = orig[i]*4;
-         p[0] = palette[n  ];
-         p[1] = palette[n+1];
-         p[2] = palette[n+2];
-         p += 3;
-      }
-   } else {
-      for (i=0; i < pixel_count; ++i) {
-         int n = orig[i]*4;
-         p[0] = palette[n  ];
-         p[1] = palette[n+1];
-         p[2] = palette[n+2];
-         p[3] = palette[n+3];
-         p += 4;
-      }
-   }
-   STBI_FREE(a->out);
-   a->out = temp_out;
-
-   STBI_NOTUSED(len);
-
-   return 1;
-}
-
-static int stbi__unpremultiply_on_load_global = 0;
-static int stbi__de_iphone_flag_global = 0;
-
-STBIDEF void stbi_set_unpremultiply_on_load(int flag_true_if_should_unpremultiply)
-{
-   stbi__unpremultiply_on_load_global = flag_true_if_should_unpremultiply;
-}
-
-STBIDEF void stbi_convert_iphone_png_to_rgb(int flag_true_if_should_convert)
-{
-   stbi__de_iphone_flag_global = flag_true_if_should_convert;
-}
-
-#ifndef STBI_THREAD_LOCAL
-#define stbi__unpremultiply_on_load  stbi__unpremultiply_on_load_global
-#define stbi__de_iphone_flag  stbi__de_iphone_flag_global
-#else
-static STBI_THREAD_LOCAL int stbi__unpremultiply_on_load_local, stbi__unpremultiply_on_load_set;
-static STBI_THREAD_LOCAL int stbi__de_iphone_flag_local, stbi__de_iphone_flag_set;
-
-STBIDEF void stbi_set_unpremultiply_on_load_thread(int flag_true_if_should_unpremultiply)
-{
-   stbi__unpremultiply_on_load_local = flag_true_if_should_unpremultiply;
-   stbi__unpremultiply_on_load_set = 1;
-}
-
-STBIDEF void stbi_convert_iphone_png_to_rgb_thread(int flag_true_if_should_convert)
-{
-   stbi__de_iphone_flag_local = flag_true_if_should_convert;
-   stbi__de_iphone_flag_set = 1;
-}
-
-#define stbi__unpremultiply_on_load  (stbi__unpremultiply_on_load_set           \
-                                       ? stbi__unpremultiply_on_load_local      \
-                                       : stbi__unpremultiply_on_load_global)
-#define stbi__de_iphone_flag  (stbi__de_iphone_flag_set                         \
-                                ? stbi__de_iphone_flag_local                    \
-                                : stbi__de_iphone_flag_global)
-#endif // STBI_THREAD_LOCAL
-
-static void stbi__de_iphone(stbi__png *z)
-{
-   stbi__context *s = z->s;
-   stbi__uint32 i, pixel_count = s->img_x * s->img_y;
-   stbi_uc *p = z->out;
-
-   if (s->img_out_n == 3) {  // convert bgr to rgb
-      for (i=0; i < pixel_count; ++i) {
-         stbi_uc t = p[0];
-         p[0] = p[2];
-         p[2] = t;
-         p += 3;
-      }
-   } else {
-      STBI_ASSERT(s->img_out_n == 4);
-      if (stbi__unpremultiply_on_load) {
-         // convert bgr to rgb and unpremultiply
-         for (i=0; i < pixel_count; ++i) {
-            stbi_uc a = p[3];
-            stbi_uc t = p[0];
-            if (a) {
-               stbi_uc half = a / 2;
-               p[0] = (p[2] * 255 + half) / a;
-               p[1] = (p[1] * 255 + half) / a;
-               p[2] = ( t   * 255 + half) / a;
-            } else {
-               p[0] = p[2];
-               p[2] = t;
-            }
-            p += 4;
-         }
-      } else {
-         // convert bgr to rgb
-         for (i=0; i < pixel_count; ++i) {
-            stbi_uc t = p[0];
-            p[0] = p[2];
-            p[2] = t;
-            p += 4;
-         }
-      }
-   }
-}
-
-#define STBI__PNG_TYPE(a,b,c,d)  (((unsigned) (a) << 24) + ((unsigned) (b) << 16) + ((unsigned) (c) << 8) + (unsigned) (d))
-
-static int stbi__parse_png_file(stbi__png *z, int scan, int req_comp)
-{
-   stbi_uc palette[1024], pal_img_n=0;
-   stbi_uc has_trans=0, tc[3]={0};
-   stbi__uint16 tc16[3];
-   stbi__uint32 ioff=0, idata_limit=0, i, pal_len=0;
-   int first=1,k,interlace=0, color=0, is_iphone=0;
-   stbi__context *s = z->s;
-
-   z->expanded = NULL;
-   z->idata = NULL;
-   z->out = NULL;
-
-   if (!stbi__check_png_header(s)) return 0;
-
-   if (scan == STBI__SCAN_type) return 1;
-
-   for (;;) {
-      stbi__pngchunk c = stbi__get_chunk_header(s);
-      switch (c.type) {
-         case STBI__PNG_TYPE('C','g','B','I'):
-            is_iphone = 1;
-            stbi__skip(s, c.length);
-            break;
-         case STBI__PNG_TYPE('I','H','D','R'): {
-            int comp,filter;
-            if (!first) return stbi__err("multiple IHDR","Corrupt PNG");
-            first = 0;
-            if (c.length != 13) return stbi__err("bad IHDR len","Corrupt PNG");
-            s->img_x = stbi__get32be(s);
-            s->img_y = stbi__get32be(s);
-            if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-            if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-            z->depth = stbi__get8(s);  if (z->depth != 1 && z->depth != 2 && z->depth != 4 && z->depth != 8 && z->depth != 16)  return stbi__err("1/2/4/8/16-bit only","PNG not supported: 1/2/4/8/16-bit only");
-            color = stbi__get8(s);  if (color > 6)         return stbi__err("bad ctype","Corrupt PNG");
-            if (color == 3 && z->depth == 16)                  return stbi__err("bad ctype","Corrupt PNG");
-            if (color == 3) pal_img_n = 3; else if (color & 1) return stbi__err("bad ctype","Corrupt PNG");
-            comp  = stbi__get8(s);  if (comp) return stbi__err("bad comp method","Corrupt PNG");
-            filter= stbi__get8(s);  if (filter) return stbi__err("bad filter method","Corrupt PNG");
-            interlace = stbi__get8(s); if (interlace>1) return stbi__err("bad interlace method","Corrupt PNG");
-            if (!s->img_x || !s->img_y) return stbi__err("0-pixel image","Corrupt PNG");
-            if (!pal_img_n) {
-               s->img_n = (color & 2 ? 3 : 1) + (color & 4 ? 1 : 0);
-               if ((1 << 30) / s->img_x / s->img_n < s->img_y) return stbi__err("too large", "Image too large to decode");
-            } else {
-               // if paletted, then pal_n is our final components, and
-               // img_n is # components to decompress/filter.
-               s->img_n = 1;
-               if ((1 << 30) / s->img_x / 4 < s->img_y) return stbi__err("too large","Corrupt PNG");
-            }
-            // even with SCAN_header, have to scan to see if we have a tRNS
-            break;
-         }
-
-         case STBI__PNG_TYPE('P','L','T','E'):  {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (c.length > 256*3) return stbi__err("invalid PLTE","Corrupt PNG");
-            pal_len = c.length / 3;
-            if (pal_len * 3 != c.length) return stbi__err("invalid PLTE","Corrupt PNG");
-            for (i=0; i < pal_len; ++i) {
-               palette[i*4+0] = stbi__get8(s);
-               palette[i*4+1] = stbi__get8(s);
-               palette[i*4+2] = stbi__get8(s);
-               palette[i*4+3] = 255;
-            }
-            break;
-         }
-
-         case STBI__PNG_TYPE('t','R','N','S'): {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (z->idata) return stbi__err("tRNS after IDAT","Corrupt PNG");
-            if (pal_img_n) {
-               if (scan == STBI__SCAN_header) { s->img_n = 4; return 1; }
-               if (pal_len == 0) return stbi__err("tRNS before PLTE","Corrupt PNG");
-               if (c.length > pal_len) return stbi__err("bad tRNS len","Corrupt PNG");
-               pal_img_n = 4;
-               for (i=0; i < c.length; ++i)
-                  palette[i*4+3] = stbi__get8(s);
-            } else {
-               if (!(s->img_n & 1)) return stbi__err("tRNS with alpha","Corrupt PNG");
-               if (c.length != (stbi__uint32) s->img_n*2) return stbi__err("bad tRNS len","Corrupt PNG");
-               has_trans = 1;
-               // non-paletted with tRNS = constant alpha. if header-scanning, we can stop now.
-               if (scan == STBI__SCAN_header) { ++s->img_n; return 1; }
-               if (z->depth == 16) {
-                  for (k = 0; k < s->img_n; ++k) tc16[k] = (stbi__uint16)stbi__get16be(s); // copy the values as-is
-               } else {
-                  for (k = 0; k < s->img_n; ++k) tc[k] = (stbi_uc)(stbi__get16be(s) & 255) * stbi__depth_scale_table[z->depth]; // non 8-bit images will be larger
-               }
-            }
-            break;
-         }
-
-         case STBI__PNG_TYPE('I','D','A','T'): {
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (pal_img_n && !pal_len) return stbi__err("no PLTE","Corrupt PNG");
-            if (scan == STBI__SCAN_header) {
-               // header scan definitely stops at first IDAT
-               if (pal_img_n)
-                  s->img_n = pal_img_n;
-               return 1;
-            }
-            if (c.length > (1u << 30)) return stbi__err("IDAT size limit", "IDAT section larger than 2^30 bytes");
-            if ((int)(ioff + c.length) < (int)ioff) return 0;
-            if (ioff + c.length > idata_limit) {
-               stbi__uint32 idata_limit_old = idata_limit;
-               stbi_uc *p;
-               if (idata_limit == 0) idata_limit = c.length > 4096 ? c.length : 4096;
-               while (ioff + c.length > idata_limit)
-                  idata_limit *= 2;
-               STBI_NOTUSED(idata_limit_old);
-               p = (stbi_uc *) STBI_REALLOC_SIZED(z->idata, idata_limit_old, idata_limit); if (p == NULL) return stbi__err("outofmem", "Out of memory");
-               z->idata = p;
-            }
-            if (!stbi__getn(s, z->idata+ioff,c.length)) return stbi__err("outofdata","Corrupt PNG");
-            ioff += c.length;
-            break;
-         }
-
-         case STBI__PNG_TYPE('I','E','N','D'): {
-            stbi__uint32 raw_len, bpl;
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if (scan != STBI__SCAN_load) return 1;
-            if (z->idata == NULL) return stbi__err("no IDAT","Corrupt PNG");
-            // initial guess for decoded data size to avoid unnecessary reallocs
-            bpl = (s->img_x * z->depth + 7) / 8; // bytes per line, per component
-            raw_len = bpl * s->img_y * s->img_n /* pixels */ + s->img_y /* filter mode per row */;
-            z->expanded = (stbi_uc *) stbi_zlib_decode_malloc_guesssize_headerflag((char *) z->idata, ioff, raw_len, (int *) &raw_len, !is_iphone);
-            if (z->expanded == NULL) return 0; // zlib should set error
-            STBI_FREE(z->idata); z->idata = NULL;
-            if ((req_comp == s->img_n+1 && req_comp != 3 && !pal_img_n) || has_trans)
-               s->img_out_n = s->img_n+1;
-            else
-               s->img_out_n = s->img_n;
-            if (!stbi__create_png_image(z, z->expanded, raw_len, s->img_out_n, z->depth, color, interlace)) return 0;
-            if (has_trans) {
-               if (z->depth == 16) {
-                  if (!stbi__compute_transparency16(z, tc16, s->img_out_n)) return 0;
-               } else {
-                  if (!stbi__compute_transparency(z, tc, s->img_out_n)) return 0;
-               }
-            }
-            if (is_iphone && stbi__de_iphone_flag && s->img_out_n > 2)
-               stbi__de_iphone(z);
-            if (pal_img_n) {
-               // pal_img_n == 3 or 4
-               s->img_n = pal_img_n; // record the actual colors we had
-               s->img_out_n = pal_img_n;
-               if (req_comp >= 3) s->img_out_n = req_comp;
-               if (!stbi__expand_png_palette(z, palette, pal_len, s->img_out_n))
-                  return 0;
-            } else if (has_trans) {
-               // non-paletted image with tRNS -> source image has (constant) alpha
-               ++s->img_n;
-            }
-            STBI_FREE(z->expanded); z->expanded = NULL;
-            // end of PNG chunk, read and skip CRC
-            stbi__get32be(s);
-            return 1;
-         }
-
-         default:
-            // if critical, fail
-            if (first) return stbi__err("first not IHDR", "Corrupt PNG");
-            if ((c.type & (1 << 29)) == 0) {
-               #ifndef STBI_NO_FAILURE_STRINGS
-               // not threadsafe
-               static char invalid_chunk[] = "XXXX PNG chunk not known";
-               invalid_chunk[0] = STBI__BYTECAST(c.type >> 24);
-               invalid_chunk[1] = STBI__BYTECAST(c.type >> 16);
-               invalid_chunk[2] = STBI__BYTECAST(c.type >>  8);
-               invalid_chunk[3] = STBI__BYTECAST(c.type >>  0);
-               #endif
-               return stbi__err(invalid_chunk, "PNG not supported: unknown PNG chunk type");
-            }
-            stbi__skip(s, c.length);
-            break;
-      }
-      // end of PNG chunk, read and skip CRC
-      stbi__get32be(s);
-   }
-}
-
-static void *stbi__do_png(stbi__png *p, int *x, int *y, int *n, int req_comp, stbi__result_info *ri)
-{
-   void *result=NULL;
-   if (req_comp < 0 || req_comp > 4) return stbi__errpuc("bad req_comp", "Internal error");
-   if (stbi__parse_png_file(p, STBI__SCAN_load, req_comp)) {
-      if (p->depth <= 8)
-         ri->bits_per_channel = 8;
-      else if (p->depth == 16)
-         ri->bits_per_channel = 16;
-      else
-         return stbi__errpuc("bad bits_per_channel", "PNG not supported: unsupported color depth");
-      result = p->out;
-      p->out = NULL;
-      if (req_comp && req_comp != p->s->img_out_n) {
-         if (ri->bits_per_channel == 8)
-            result = stbi__convert_format((unsigned char *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-         else
-            result = stbi__convert_format16((stbi__uint16 *) result, p->s->img_out_n, req_comp, p->s->img_x, p->s->img_y);
-         p->s->img_out_n = req_comp;
-         if (result == NULL) return result;
-      }
-      *x = p->s->img_x;
-      *y = p->s->img_y;
-      if (n) *n = p->s->img_n;
-   }
-   STBI_FREE(p->out);      p->out      = NULL;
-   STBI_FREE(p->expanded); p->expanded = NULL;
-   STBI_FREE(p->idata);    p->idata    = NULL;
-
-   return result;
-}
-
-static void *stbi__png_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi__png p;
-   p.s = s;
-   return stbi__do_png(&p, x,y,comp,req_comp, ri);
-}
-
-static int stbi__png_test(stbi__context *s)
-{
-   int r;
-   r = stbi__check_png_header(s);
-   stbi__rewind(s);
-   return r;
-}
-
-static int stbi__png_info_raw(stbi__png *p, int *x, int *y, int *comp)
-{
-   if (!stbi__parse_png_file(p, STBI__SCAN_header, 0)) {
-      stbi__rewind( p->s );
-      return 0;
-   }
-   if (x) *x = p->s->img_x;
-   if (y) *y = p->s->img_y;
-   if (comp) *comp = p->s->img_n;
-   return 1;
-}
-
-static int stbi__png_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   stbi__png p;
-   p.s = s;
-   return stbi__png_info_raw(&p, x, y, comp);
-}
-
-static int stbi__png_is16(stbi__context *s)
-{
-   stbi__png p;
-   p.s = s;
-   if (!stbi__png_info_raw(&p, NULL, NULL, NULL))
-	   return 0;
-   if (p.depth != 16) {
-      stbi__rewind(p.s);
-      return 0;
-   }
-   return 1;
-}
-#endif
-
-// Microsoft/Windows BMP image
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_test_raw(stbi__context *s)
-{
-   int r;
-   int sz;
-   if (stbi__get8(s) != 'B') return 0;
-   if (stbi__get8(s) != 'M') return 0;
-   stbi__get32le(s); // discard filesize
-   stbi__get16le(s); // discard reserved
-   stbi__get16le(s); // discard reserved
-   stbi__get32le(s); // discard data offset
-   sz = stbi__get32le(s);
-   r = (sz == 12 || sz == 40 || sz == 56 || sz == 108 || sz == 124);
-   return r;
-}
-
-static int stbi__bmp_test(stbi__context *s)
-{
-   int r = stbi__bmp_test_raw(s);
-   stbi__rewind(s);
-   return r;
-}
-
-
-// returns 0..31 for the highest set bit
-static int stbi__high_bit(unsigned int z)
-{
-   int n=0;
-   if (z == 0) return -1;
-   if (z >= 0x10000) { n += 16; z >>= 16; }
-   if (z >= 0x00100) { n +=  8; z >>=  8; }
-   if (z >= 0x00010) { n +=  4; z >>=  4; }
-   if (z >= 0x00004) { n +=  2; z >>=  2; }
-   if (z >= 0x00002) { n +=  1;/* >>=  1;*/ }
-   return n;
-}
-
-static int stbi__bitcount(unsigned int a)
-{
-   a = (a & 0x55555555) + ((a >>  1) & 0x55555555); // max 2
-   a = (a & 0x33333333) + ((a >>  2) & 0x33333333); // max 4
-   a = (a + (a >> 4)) & 0x0f0f0f0f; // max 8 per 4, now 8 bits
-   a = (a + (a >> 8)); // max 16 per 8 bits
-   a = (a + (a >> 16)); // max 32 per 8 bits
-   return a & 0xff;
-}
-
-// extract an arbitrarily-aligned N-bit value (N=bits)
-// from v, and then make it 8-bits long and fractionally
-// extend it to full full range.
-static int stbi__shiftsigned(unsigned int v, int shift, int bits)
-{
-   static unsigned int mul_table[9] = {
-      0,
-      0xff/*0b11111111*/, 0x55/*0b01010101*/, 0x49/*0b01001001*/, 0x11/*0b00010001*/,
-      0x21/*0b00100001*/, 0x41/*0b01000001*/, 0x81/*0b10000001*/, 0x01/*0b00000001*/,
-   };
-   static unsigned int shift_table[9] = {
-      0, 0,0,1,0,2,4,6,0,
-   };
-   if (shift < 0)
-      v <<= -shift;
-   else
-      v >>= shift;
-   STBI_ASSERT(v < 256);
-   v >>= (8-bits);
-   STBI_ASSERT(bits >= 0 && bits <= 8);
-   return (int) ((unsigned) v * mul_table[bits]) >> shift_table[bits];
-}
-
-typedef struct
-{
-   int bpp, offset, hsz;
-   unsigned int mr,mg,mb,ma, all_a;
-   int extra_read;
-} stbi__bmp_data;
-
-static int stbi__bmp_set_mask_defaults(stbi__bmp_data *info, int compress)
-{
-   // BI_BITFIELDS specifies masks explicitly, don't override
-   if (compress == 3)
-      return 1;
-
-   if (compress == 0) {
-      if (info->bpp == 16) {
-         info->mr = 31u << 10;
-         info->mg = 31u <<  5;
-         info->mb = 31u <<  0;
-      } else if (info->bpp == 32) {
-         info->mr = 0xffu << 16;
-         info->mg = 0xffu <<  8;
-         info->mb = 0xffu <<  0;
-         info->ma = 0xffu << 24;
-         info->all_a = 0; // if all_a is 0 at end, then we loaded alpha channel but it was all 0
-      } else {
-         // otherwise, use defaults, which is all-0
-         info->mr = info->mg = info->mb = info->ma = 0;
-      }
-      return 1;
-   }
-   return 0; // error
-}
-
-static void *stbi__bmp_parse_header(stbi__context *s, stbi__bmp_data *info)
-{
-   int hsz;
-   if (stbi__get8(s) != 'B' || stbi__get8(s) != 'M') return stbi__errpuc("not BMP", "Corrupt BMP");
-   stbi__get32le(s); // discard filesize
-   stbi__get16le(s); // discard reserved
-   stbi__get16le(s); // discard reserved
-   info->offset = stbi__get32le(s);
-   info->hsz = hsz = stbi__get32le(s);
-   info->mr = info->mg = info->mb = info->ma = 0;
-   info->extra_read = 14;
-
-   if (info->offset < 0) return stbi__errpuc("bad BMP", "bad BMP");
-
-   if (hsz != 12 && hsz != 40 && hsz != 56 && hsz != 108 && hsz != 124) return stbi__errpuc("unknown BMP", "BMP type not supported: unknown");
-   if (hsz == 12) {
-      s->img_x = stbi__get16le(s);
-      s->img_y = stbi__get16le(s);
-   } else {
-      s->img_x = stbi__get32le(s);
-      s->img_y = stbi__get32le(s);
-   }
-   if (stbi__get16le(s) != 1) return stbi__errpuc("bad BMP", "bad BMP");
-   info->bpp = stbi__get16le(s);
-   if (hsz != 12) {
-      int compress = stbi__get32le(s);
-      if (compress == 1 || compress == 2) return stbi__errpuc("BMP RLE", "BMP type not supported: RLE");
-      if (compress >= 4) return stbi__errpuc("BMP JPEG/PNG", "BMP type not supported: unsupported compression"); // this includes PNG/JPEG modes
-      if (compress == 3 && info->bpp != 16 && info->bpp != 32) return stbi__errpuc("bad BMP", "bad BMP"); // bitfields requires 16 or 32 bits/pixel
-      stbi__get32le(s); // discard sizeof
-      stbi__get32le(s); // discard hres
-      stbi__get32le(s); // discard vres
-      stbi__get32le(s); // discard colorsused
-      stbi__get32le(s); // discard max important
-      if (hsz == 40 || hsz == 56) {
-         if (hsz == 56) {
-            stbi__get32le(s);
-            stbi__get32le(s);
-            stbi__get32le(s);
-            stbi__get32le(s);
-         }
-         if (info->bpp == 16 || info->bpp == 32) {
-            if (compress == 0) {
-               stbi__bmp_set_mask_defaults(info, compress);
-            } else if (compress == 3) {
-               info->mr = stbi__get32le(s);
-               info->mg = stbi__get32le(s);
-               info->mb = stbi__get32le(s);
-               info->extra_read += 12;
-               // not documented, but generated by photoshop and handled by mspaint
-               if (info->mr == info->mg && info->mg == info->mb) {
-                  // ?!?!?
-                  return stbi__errpuc("bad BMP", "bad BMP");
-               }
-            } else
-               return stbi__errpuc("bad BMP", "bad BMP");
-         }
-      } else {
-         // V4/V5 header
-         int i;
-         if (hsz != 108 && hsz != 124)
-            return stbi__errpuc("bad BMP", "bad BMP");
-         info->mr = stbi__get32le(s);
-         info->mg = stbi__get32le(s);
-         info->mb = stbi__get32le(s);
-         info->ma = stbi__get32le(s);
-         if (compress != 3) // override mr/mg/mb unless in BI_BITFIELDS mode, as per docs
-            stbi__bmp_set_mask_defaults(info, compress);
-         stbi__get32le(s); // discard color space
-         for (i=0; i < 12; ++i)
-            stbi__get32le(s); // discard color space parameters
-         if (hsz == 124) {
-            stbi__get32le(s); // discard rendering intent
-            stbi__get32le(s); // discard offset of profile data
-            stbi__get32le(s); // discard size of profile data
-            stbi__get32le(s); // discard reserved
-         }
-      }
-   }
-   return (void *) 1;
-}
-
-
-static void *stbi__bmp_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *out;
-   unsigned int mr=0,mg=0,mb=0,ma=0, all_a;
-   stbi_uc pal[256][4];
-   int psize=0,i,j,width;
-   int flip_vertically, pad, target;
-   stbi__bmp_data info;
-   STBI_NOTUSED(ri);
-
-   info.all_a = 255;
-   if (stbi__bmp_parse_header(s, &info) == NULL)
-      return NULL; // error code already set
-
-   flip_vertically = ((int) s->img_y) > 0;
-   s->img_y = abs((int) s->img_y);
-
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   mr = info.mr;
-   mg = info.mg;
-   mb = info.mb;
-   ma = info.ma;
-   all_a = info.all_a;
-
-   if (info.hsz == 12) {
-      if (info.bpp < 24)
-         psize = (info.offset - info.extra_read - 24) / 3;
-   } else {
-      if (info.bpp < 16)
-         psize = (info.offset - info.extra_read - info.hsz) >> 2;
-   }
-   if (psize == 0) {
-      // accept some number of extra bytes after the header, but if the offset points either to before
-      // the header ends or implies a large amount of extra data, reject the file as malformed
-      int bytes_read_so_far = s->callback_already_read + (int)(s->img_buffer - s->img_buffer_original);
-      int header_limit = 1024; // max we actually read is below 256 bytes currently.
-      int extra_data_limit = 256*4; // what ordinarily goes here is a palette; 256 entries*4 bytes is its max size.
-      if (bytes_read_so_far <= 0 || bytes_read_so_far > header_limit) {
-         return stbi__errpuc("bad header", "Corrupt BMP");
-      }
-      // we established that bytes_read_so_far is positive and sensible.
-      // the first half of this test rejects offsets that are either too small positives, or
-      // negative, and guarantees that info.offset >= bytes_read_so_far > 0. this in turn
-      // ensures the number computed in the second half of the test can't overflow.
-      if (info.offset < bytes_read_so_far || info.offset - bytes_read_so_far > extra_data_limit) {
-         return stbi__errpuc("bad offset", "Corrupt BMP");
-      } else {
-         stbi__skip(s, info.offset - bytes_read_so_far);
-      }
-   }
-
-   if (info.bpp == 24 && ma == 0xff000000)
-      s->img_n = 3;
-   else
-      s->img_n = ma ? 4 : 3;
-   if (req_comp && req_comp >= 3) // we can directly decode 3 or 4
-      target = req_comp;
-   else
-      target = s->img_n; // if they want monochrome, we'll post-convert
-
-   // sanity-check size
-   if (!stbi__mad3sizes_valid(target, s->img_x, s->img_y, 0))
-      return stbi__errpuc("too large", "Corrupt BMP");
-
-   out = (stbi_uc *) stbi__malloc_mad3(target, s->img_x, s->img_y, 0);
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   if (info.bpp < 16) {
-      int z=0;
-      if (psize == 0 || psize > 256) { STBI_FREE(out); return stbi__errpuc("invalid", "Corrupt BMP"); }
-      for (i=0; i < psize; ++i) {
-         pal[i][2] = stbi__get8(s);
-         pal[i][1] = stbi__get8(s);
-         pal[i][0] = stbi__get8(s);
-         if (info.hsz != 12) stbi__get8(s);
-         pal[i][3] = 255;
-      }
-      stbi__skip(s, info.offset - info.extra_read - info.hsz - psize * (info.hsz == 12 ? 3 : 4));
-      if (info.bpp == 1) width = (s->img_x + 7) >> 3;
-      else if (info.bpp == 4) width = (s->img_x + 1) >> 1;
-      else if (info.bpp == 8) width = s->img_x;
-      else { STBI_FREE(out); return stbi__errpuc("bad bpp", "Corrupt BMP"); }
-      pad = (-width)&3;
-      if (info.bpp == 1) {
-         for (j=0; j < (int) s->img_y; ++j) {
-            int bit_offset = 7, v = stbi__get8(s);
-            for (i=0; i < (int) s->img_x; ++i) {
-               int color = (v>>bit_offset)&0x1;
-               out[z++] = pal[color][0];
-               out[z++] = pal[color][1];
-               out[z++] = pal[color][2];
-               if (target == 4) out[z++] = 255;
-               if (i+1 == (int) s->img_x) break;
-               if((--bit_offset) < 0) {
-                  bit_offset = 7;
-                  v = stbi__get8(s);
-               }
-            }
-            stbi__skip(s, pad);
-         }
-      } else {
-         for (j=0; j < (int) s->img_y; ++j) {
-            for (i=0; i < (int) s->img_x; i += 2) {
-               int v=stbi__get8(s),v2=0;
-               if (info.bpp == 4) {
-                  v2 = v & 15;
-                  v >>= 4;
-               }
-               out[z++] = pal[v][0];
-               out[z++] = pal[v][1];
-               out[z++] = pal[v][2];
-               if (target == 4) out[z++] = 255;
-               if (i+1 == (int) s->img_x) break;
-               v = (info.bpp == 8) ? stbi__get8(s) : v2;
-               out[z++] = pal[v][0];
-               out[z++] = pal[v][1];
-               out[z++] = pal[v][2];
-               if (target == 4) out[z++] = 255;
-            }
-            stbi__skip(s, pad);
-         }
-      }
-   } else {
-      int rshift=0,gshift=0,bshift=0,ashift=0,rcount=0,gcount=0,bcount=0,acount=0;
-      int z = 0;
-      int easy=0;
-      stbi__skip(s, info.offset - info.extra_read - info.hsz);
-      if (info.bpp == 24) width = 3 * s->img_x;
-      else if (info.bpp == 16) width = 2*s->img_x;
-      else /* bpp = 32 and pad = 0 */ width=0;
-      pad = (-width) & 3;
-      if (info.bpp == 24) {
-         easy = 1;
-      } else if (info.bpp == 32) {
-         if (mb == 0xff && mg == 0xff00 && mr == 0x00ff0000 && ma == 0xff000000)
-            easy = 2;
-      }
-      if (!easy) {
-         if (!mr || !mg || !mb) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
-         // right shift amt to put high bit in position #7
-         rshift = stbi__high_bit(mr)-7; rcount = stbi__bitcount(mr);
-         gshift = stbi__high_bit(mg)-7; gcount = stbi__bitcount(mg);
-         bshift = stbi__high_bit(mb)-7; bcount = stbi__bitcount(mb);
-         ashift = stbi__high_bit(ma)-7; acount = stbi__bitcount(ma);
-         if (rcount > 8 || gcount > 8 || bcount > 8 || acount > 8) { STBI_FREE(out); return stbi__errpuc("bad masks", "Corrupt BMP"); }
-      }
-      for (j=0; j < (int) s->img_y; ++j) {
-         if (easy) {
-            for (i=0; i < (int) s->img_x; ++i) {
-               unsigned char a;
-               out[z+2] = stbi__get8(s);
-               out[z+1] = stbi__get8(s);
-               out[z+0] = stbi__get8(s);
-               z += 3;
-               a = (easy == 2 ? stbi__get8(s) : 255);
-               all_a |= a;
-               if (target == 4) out[z++] = a;
-            }
-         } else {
-            int bpp = info.bpp;
-            for (i=0; i < (int) s->img_x; ++i) {
-               stbi__uint32 v = (bpp == 16 ? (stbi__uint32) stbi__get16le(s) : stbi__get32le(s));
-               unsigned int a;
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mr, rshift, rcount));
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mg, gshift, gcount));
-               out[z++] = STBI__BYTECAST(stbi__shiftsigned(v & mb, bshift, bcount));
-               a = (ma ? stbi__shiftsigned(v & ma, ashift, acount) : 255);
-               all_a |= a;
-               if (target == 4) out[z++] = STBI__BYTECAST(a);
-            }
-         }
-         stbi__skip(s, pad);
-      }
-   }
-
-   // if alpha channel is all 0s, replace with all 255s
-   if (target == 4 && all_a == 0)
-      for (i=4*s->img_x*s->img_y-1; i >= 0; i -= 4)
-         out[i] = 255;
-
-   if (flip_vertically) {
-      stbi_uc t;
-      for (j=0; j < (int) s->img_y>>1; ++j) {
-         stbi_uc *p1 = out +      j     *s->img_x*target;
-         stbi_uc *p2 = out + (s->img_y-1-j)*s->img_x*target;
-         for (i=0; i < (int) s->img_x*target; ++i) {
-            t = p1[i]; p1[i] = p2[i]; p2[i] = t;
-         }
-      }
-   }
-
-   if (req_comp && req_comp != target) {
-      out = stbi__convert_format(out, target, req_comp, s->img_x, s->img_y);
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-
-   *x = s->img_x;
-   *y = s->img_y;
-   if (comp) *comp = s->img_n;
-   return out;
-}
-#endif
-
-// Targa Truevision - TGA
-// by Jonathan Dummer
-#ifndef STBI_NO_TGA
-// returns STBI_rgb or whatever, 0 on error
-static int stbi__tga_get_comp(int bits_per_pixel, int is_grey, int* is_rgb16)
-{
-   // only RGB or RGBA (incl. 16bit) or grey allowed
-   if (is_rgb16) *is_rgb16 = 0;
-   switch(bits_per_pixel) {
-      case 8:  return STBI_grey;
-      case 16: if(is_grey) return STBI_grey_alpha;
-               // fallthrough
-      case 15: if(is_rgb16) *is_rgb16 = 1;
-               return STBI_rgb;
-      case 24: // fallthrough
-      case 32: return bits_per_pixel/8;
-      default: return 0;
-   }
-}
-
-static int stbi__tga_info(stbi__context *s, int *x, int *y, int *comp)
-{
-    int tga_w, tga_h, tga_comp, tga_image_type, tga_bits_per_pixel, tga_colormap_bpp;
-    int sz, tga_colormap_type;
-    stbi__get8(s);                   // discard Offset
-    tga_colormap_type = stbi__get8(s); // colormap type
-    if( tga_colormap_type > 1 ) {
-        stbi__rewind(s);
-        return 0;      // only RGB or indexed allowed
-    }
-    tga_image_type = stbi__get8(s); // image type
-    if ( tga_colormap_type == 1 ) { // colormapped (paletted) image
-        if (tga_image_type != 1 && tga_image_type != 9) {
-            stbi__rewind(s);
-            return 0;
-        }
-        stbi__skip(s,4);       // skip index of first colormap entry and number of entries
-        sz = stbi__get8(s);    //   check bits per palette color entry
-        if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) {
-            stbi__rewind(s);
-            return 0;
-        }
-        stbi__skip(s,4);       // skip image x and y origin
-        tga_colormap_bpp = sz;
-    } else { // "normal" image w/o colormap - only RGB or grey allowed, +/- RLE
-        if ( (tga_image_type != 2) && (tga_image_type != 3) && (tga_image_type != 10) && (tga_image_type != 11) ) {
-            stbi__rewind(s);
-            return 0; // only RGB or grey allowed, +/- RLE
-        }
-        stbi__skip(s,9); // skip colormap specification and image x/y origin
-        tga_colormap_bpp = 0;
-    }
-    tga_w = stbi__get16le(s);
-    if( tga_w < 1 ) {
-        stbi__rewind(s);
-        return 0;   // test width
-    }
-    tga_h = stbi__get16le(s);
-    if( tga_h < 1 ) {
-        stbi__rewind(s);
-        return 0;   // test height
-    }
-    tga_bits_per_pixel = stbi__get8(s); // bits per pixel
-    stbi__get8(s); // ignore alpha bits
-    if (tga_colormap_bpp != 0) {
-        if((tga_bits_per_pixel != 8) && (tga_bits_per_pixel != 16)) {
-            // when using a colormap, tga_bits_per_pixel is the size of the indexes
-            // I don't think anything but 8 or 16bit indexes makes sense
-            stbi__rewind(s);
-            return 0;
-        }
-        tga_comp = stbi__tga_get_comp(tga_colormap_bpp, 0, NULL);
-    } else {
-        tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3) || (tga_image_type == 11), NULL);
-    }
-    if(!tga_comp) {
-      stbi__rewind(s);
-      return 0;
-    }
-    if (x) *x = tga_w;
-    if (y) *y = tga_h;
-    if (comp) *comp = tga_comp;
-    return 1;                   // seems to have passed everything
-}
-
-static int stbi__tga_test(stbi__context *s)
-{
-   int res = 0;
-   int sz, tga_color_type;
-   stbi__get8(s);      //   discard Offset
-   tga_color_type = stbi__get8(s);   //   color type
-   if ( tga_color_type > 1 ) goto errorEnd;   //   only RGB or indexed allowed
-   sz = stbi__get8(s);   //   image type
-   if ( tga_color_type == 1 ) { // colormapped (paletted) image
-      if (sz != 1 && sz != 9) goto errorEnd; // colortype 1 demands image type 1 or 9
-      stbi__skip(s,4);       // skip index of first colormap entry and number of entries
-      sz = stbi__get8(s);    //   check bits per palette color entry
-      if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
-      stbi__skip(s,4);       // skip image x and y origin
-   } else { // "normal" image w/o colormap
-      if ( (sz != 2) && (sz != 3) && (sz != 10) && (sz != 11) ) goto errorEnd; // only RGB or grey allowed, +/- RLE
-      stbi__skip(s,9); // skip colormap specification and image x/y origin
-   }
-   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test width
-   if ( stbi__get16le(s) < 1 ) goto errorEnd;      //   test height
-   sz = stbi__get8(s);   //   bits per pixel
-   if ( (tga_color_type == 1) && (sz != 8) && (sz != 16) ) goto errorEnd; // for colormapped images, bpp is size of an index
-   if ( (sz != 8) && (sz != 15) && (sz != 16) && (sz != 24) && (sz != 32) ) goto errorEnd;
-
-   res = 1; // if we got this far, everything's good and we can return 1 instead of 0
-
-errorEnd:
-   stbi__rewind(s);
-   return res;
-}
-
-// read 16bit value and convert to 24bit RGB
-static void stbi__tga_read_rgb16(stbi__context *s, stbi_uc* out)
-{
-   stbi__uint16 px = (stbi__uint16)stbi__get16le(s);
-   stbi__uint16 fiveBitMask = 31;
-   // we have 3 channels with 5bits each
-   int r = (px >> 10) & fiveBitMask;
-   int g = (px >> 5) & fiveBitMask;
-   int b = px & fiveBitMask;
-   // Note that this saves the data in RGB(A) order, so it doesn't need to be swapped later
-   out[0] = (stbi_uc)((r * 255)/31);
-   out[1] = (stbi_uc)((g * 255)/31);
-   out[2] = (stbi_uc)((b * 255)/31);
-
-   // some people claim that the most significant bit might be used for alpha
-   // (possibly if an alpha-bit is set in the "image descriptor byte")
-   // but that only made 16bit test images completely translucent..
-   // so let's treat all 15 and 16bit TGAs as RGB with no alpha.
-}
-
-static void *stbi__tga_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   //   read in the TGA header stuff
-   int tga_offset = stbi__get8(s);
-   int tga_indexed = stbi__get8(s);
-   int tga_image_type = stbi__get8(s);
-   int tga_is_RLE = 0;
-   int tga_palette_start = stbi__get16le(s);
-   int tga_palette_len = stbi__get16le(s);
-   int tga_palette_bits = stbi__get8(s);
-   int tga_x_origin = stbi__get16le(s);
-   int tga_y_origin = stbi__get16le(s);
-   int tga_width = stbi__get16le(s);
-   int tga_height = stbi__get16le(s);
-   int tga_bits_per_pixel = stbi__get8(s);
-   int tga_comp, tga_rgb16=0;
-   int tga_inverted = stbi__get8(s);
-   // int tga_alpha_bits = tga_inverted & 15; // the 4 lowest bits - unused (useless?)
-   //   image data
-   unsigned char *tga_data;
-   unsigned char *tga_palette = NULL;
-   int i, j;
-   unsigned char raw_data[4] = {0};
-   int RLE_count = 0;
-   int RLE_repeating = 0;
-   int read_next_pixel = 1;
-   STBI_NOTUSED(ri);
-   STBI_NOTUSED(tga_x_origin); // @TODO
-   STBI_NOTUSED(tga_y_origin); // @TODO
-
-   if (tga_height > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (tga_width > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   //   do a tiny bit of precessing
-   if ( tga_image_type >= 8 )
-   {
-      tga_image_type -= 8;
-      tga_is_RLE = 1;
-   }
-   tga_inverted = 1 - ((tga_inverted >> 5) & 1);
-
-   //   If I'm paletted, then I'll use the number of bits from the palette
-   if ( tga_indexed ) tga_comp = stbi__tga_get_comp(tga_palette_bits, 0, &tga_rgb16);
-   else tga_comp = stbi__tga_get_comp(tga_bits_per_pixel, (tga_image_type == 3), &tga_rgb16);
-
-   if(!tga_comp) // shouldn't really happen, stbi__tga_test() should have ensured basic consistency
-      return stbi__errpuc("bad format", "Can't find out TGA pixelformat");
-
-   //   tga info
-   *x = tga_width;
-   *y = tga_height;
-   if (comp) *comp = tga_comp;
-
-   if (!stbi__mad3sizes_valid(tga_width, tga_height, tga_comp, 0))
-      return stbi__errpuc("too large", "Corrupt TGA");
-
-   tga_data = (unsigned char*)stbi__malloc_mad3(tga_width, tga_height, tga_comp, 0);
-   if (!tga_data) return stbi__errpuc("outofmem", "Out of memory");
-
-   // skip to the data's starting position (offset usually = 0)
-   stbi__skip(s, tga_offset );
-
-   if ( !tga_indexed && !tga_is_RLE && !tga_rgb16 ) {
-      for (i=0; i < tga_height; ++i) {
-         int row = tga_inverted ? tga_height -i - 1 : i;
-         stbi_uc *tga_row = tga_data + row*tga_width*tga_comp;
-         stbi__getn(s, tga_row, tga_width * tga_comp);
-      }
-   } else  {
-      //   do I need to load a palette?
-      if ( tga_indexed)
-      {
-         if (tga_palette_len == 0) {  /* you have to have at least one entry! */
-            STBI_FREE(tga_data);
-            return stbi__errpuc("bad palette", "Corrupt TGA");
-         }
-
-         //   any data to skip? (offset usually = 0)
-         stbi__skip(s, tga_palette_start );
-         //   load the palette
-         tga_palette = (unsigned char*)stbi__malloc_mad2(tga_palette_len, tga_comp, 0);
-         if (!tga_palette) {
-            STBI_FREE(tga_data);
-            return stbi__errpuc("outofmem", "Out of memory");
-         }
-         if (tga_rgb16) {
-            stbi_uc *pal_entry = tga_palette;
-            STBI_ASSERT(tga_comp == STBI_rgb);
-            for (i=0; i < tga_palette_len; ++i) {
-               stbi__tga_read_rgb16(s, pal_entry);
-               pal_entry += tga_comp;
-            }
-         } else if (!stbi__getn(s, tga_palette, tga_palette_len * tga_comp)) {
-               STBI_FREE(tga_data);
-               STBI_FREE(tga_palette);
-               return stbi__errpuc("bad palette", "Corrupt TGA");
-         }
-      }
-      //   load the data
-      for (i=0; i < tga_width * tga_height; ++i)
-      {
-         //   if I'm in RLE mode, do I need to get a RLE stbi__pngchunk?
-         if ( tga_is_RLE )
-         {
-            if ( RLE_count == 0 )
-            {
-               //   yep, get the next byte as a RLE command
-               int RLE_cmd = stbi__get8(s);
-               RLE_count = 1 + (RLE_cmd & 127);
-               RLE_repeating = RLE_cmd >> 7;
-               read_next_pixel = 1;
-            } else if ( !RLE_repeating )
-            {
-               read_next_pixel = 1;
-            }
-         } else
-         {
-            read_next_pixel = 1;
-         }
-         //   OK, if I need to read a pixel, do it now
-         if ( read_next_pixel )
-         {
-            //   load however much data we did have
-            if ( tga_indexed )
-            {
-               // read in index, then perform the lookup
-               int pal_idx = (tga_bits_per_pixel == 8) ? stbi__get8(s) : stbi__get16le(s);
-               if ( pal_idx >= tga_palette_len ) {
-                  // invalid index
-                  pal_idx = 0;
-               }
-               pal_idx *= tga_comp;
-               for (j = 0; j < tga_comp; ++j) {
-                  raw_data[j] = tga_palette[pal_idx+j];
-               }
-            } else if(tga_rgb16) {
-               STBI_ASSERT(tga_comp == STBI_rgb);
-               stbi__tga_read_rgb16(s, raw_data);
-            } else {
-               //   read in the data raw
-               for (j = 0; j < tga_comp; ++j) {
-                  raw_data[j] = stbi__get8(s);
-               }
-            }
-            //   clear the reading flag for the next pixel
-            read_next_pixel = 0;
-         } // end of reading a pixel
-
-         // copy data
-         for (j = 0; j < tga_comp; ++j)
-           tga_data[i*tga_comp+j] = raw_data[j];
-
-         //   in case we're in RLE mode, keep counting down
-         --RLE_count;
-      }
-      //   do I need to invert the image?
-      if ( tga_inverted )
-      {
-         for (j = 0; j*2 < tga_height; ++j)
-         {
-            int index1 = j * tga_width * tga_comp;
-            int index2 = (tga_height - 1 - j) * tga_width * tga_comp;
-            for (i = tga_width * tga_comp; i > 0; --i)
-            {
-               unsigned char temp = tga_data[index1];
-               tga_data[index1] = tga_data[index2];
-               tga_data[index2] = temp;
-               ++index1;
-               ++index2;
-            }
-         }
-      }
-      //   clear my palette, if I had one
-      if ( tga_palette != NULL )
-      {
-         STBI_FREE( tga_palette );
-      }
-   }
-
-   // swap RGB - if the source data was RGB16, it already is in the right order
-   if (tga_comp >= 3 && !tga_rgb16)
-   {
-      unsigned char* tga_pixel = tga_data;
-      for (i=0; i < tga_width * tga_height; ++i)
-      {
-         unsigned char temp = tga_pixel[0];
-         tga_pixel[0] = tga_pixel[2];
-         tga_pixel[2] = temp;
-         tga_pixel += tga_comp;
-      }
-   }
-
-   // convert to target component count
-   if (req_comp && req_comp != tga_comp)
-      tga_data = stbi__convert_format(tga_data, tga_comp, req_comp, tga_width, tga_height);
-
-   //   the things I do to get rid of an error message, and yet keep
-   //   Microsoft's C compilers happy... [8^(
-   tga_palette_start = tga_palette_len = tga_palette_bits =
-         tga_x_origin = tga_y_origin = 0;
-   STBI_NOTUSED(tga_palette_start);
-   //   OK, done
-   return tga_data;
-}
-#endif
-
-// *************************************************************************************************
-// Photoshop PSD loader -- PD by Thatcher Ulrich, integration by Nicolas Schulz, tweaked by STB
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_test(stbi__context *s)
-{
-   int r = (stbi__get32be(s) == 0x38425053);
-   stbi__rewind(s);
-   return r;
-}
-
-static int stbi__psd_decode_rle(stbi__context *s, stbi_uc *p, int pixelCount)
-{
-   int count, nleft, len;
-
-   count = 0;
-   while ((nleft = pixelCount - count) > 0) {
-      len = stbi__get8(s);
-      if (len == 128) {
-         // No-op.
-      } else if (len < 128) {
-         // Copy next len+1 bytes literally.
-         len++;
-         if (len > nleft) return 0; // corrupt data
-         count += len;
-         while (len) {
-            *p = stbi__get8(s);
-            p += 4;
-            len--;
-         }
-      } else if (len > 128) {
-         stbi_uc   val;
-         // Next -len+1 bytes in the dest are replicated from next source byte.
-         // (Interpret len as a negative 8-bit int.)
-         len = 257 - len;
-         if (len > nleft) return 0; // corrupt data
-         val = stbi__get8(s);
-         count += len;
-         while (len) {
-            *p = val;
-            p += 4;
-            len--;
-         }
-      }
-   }
-
-   return 1;
-}
-
-static void *stbi__psd_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri, int bpc)
-{
-   int pixelCount;
-   int channelCount, compression;
-   int channel, i;
-   int bitdepth;
-   int w,h;
-   stbi_uc *out;
-   STBI_NOTUSED(ri);
-
-   // Check identifier
-   if (stbi__get32be(s) != 0x38425053)   // "8BPS"
-      return stbi__errpuc("not PSD", "Corrupt PSD image");
-
-   // Check file type version.
-   if (stbi__get16be(s) != 1)
-      return stbi__errpuc("wrong version", "Unsupported version of PSD image");
-
-   // Skip 6 reserved bytes.
-   stbi__skip(s, 6 );
-
-   // Read the number of channels (R, G, B, A, etc).
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16)
-      return stbi__errpuc("wrong channel count", "Unsupported number of channels in PSD image");
-
-   // Read the rows and columns of the image.
-   h = stbi__get32be(s);
-   w = stbi__get32be(s);
-
-   if (h > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (w > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   // Make sure the depth is 8 bits.
-   bitdepth = stbi__get16be(s);
-   if (bitdepth != 8 && bitdepth != 16)
-      return stbi__errpuc("unsupported bit depth", "PSD bit depth is not 8 or 16 bit");
-
-   // Make sure the color mode is RGB.
-   // Valid options are:
-   //   0: Bitmap
-   //   1: Grayscale
-   //   2: Indexed color
-   //   3: RGB color
-   //   4: CMYK color
-   //   7: Multichannel
-   //   8: Duotone
-   //   9: Lab color
-   if (stbi__get16be(s) != 3)
-      return stbi__errpuc("wrong color format", "PSD is not in RGB color format");
-
-   // Skip the Mode Data.  (It's the palette for indexed color; other info for other modes.)
-   stbi__skip(s,stbi__get32be(s) );
-
-   // Skip the image resources.  (resolution, pen tool paths, etc)
-   stbi__skip(s, stbi__get32be(s) );
-
-   // Skip the reserved data.
-   stbi__skip(s, stbi__get32be(s) );
-
-   // Find out if the data is compressed.
-   // Known values:
-   //   0: no compression
-   //   1: RLE compressed
-   compression = stbi__get16be(s);
-   if (compression > 1)
-      return stbi__errpuc("bad compression", "PSD has an unknown compression format");
-
-   // Check size
-   if (!stbi__mad3sizes_valid(4, w, h, 0))
-      return stbi__errpuc("too large", "Corrupt PSD");
-
-   // Create the destination image.
-
-   if (!compression && bitdepth == 16 && bpc == 16) {
-      out = (stbi_uc *) stbi__malloc_mad3(8, w, h, 0);
-      ri->bits_per_channel = 16;
-   } else
-      out = (stbi_uc *) stbi__malloc(4 * w*h);
-
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   pixelCount = w*h;
-
-   // Initialize the data to zero.
-   //memset( out, 0, pixelCount * 4 );
-
-   // Finally, the image data.
-   if (compression) {
-      // RLE as used by .PSD and .TIFF
-      // Loop until you get the number of unpacked bytes you are expecting:
-      //     Read the next source byte into n.
-      //     If n is between 0 and 127 inclusive, copy the next n+1 bytes literally.
-      //     Else if n is between -127 and -1 inclusive, copy the next byte -n+1 times.
-      //     Else if n is 128, noop.
-      // Endloop
-
-      // The RLE-compressed data is preceded by a 2-byte data count for each row in the data,
-      // which we're going to just skip.
-      stbi__skip(s, h * channelCount * 2 );
-
-      // Read the RLE data by channel.
-      for (channel = 0; channel < 4; channel++) {
-         stbi_uc *p;
-
-         p = out+channel;
-         if (channel >= channelCount) {
-            // Fill this channel with default data.
-            for (i = 0; i < pixelCount; i++, p += 4)
-               *p = (channel == 3 ? 255 : 0);
-         } else {
-            // Read the RLE data.
-            if (!stbi__psd_decode_rle(s, p, pixelCount)) {
-               STBI_FREE(out);
-               return stbi__errpuc("corrupt", "bad RLE data");
-            }
-         }
-      }
-
-   } else {
-      // We're at the raw image data.  It's each channel in order (Red, Green, Blue, Alpha, ...)
-      // where each channel consists of an 8-bit (or 16-bit) value for each pixel in the image.
-
-      // Read the data by channel.
-      for (channel = 0; channel < 4; channel++) {
-         if (channel >= channelCount) {
-            // Fill this channel with default data.
-            if (bitdepth == 16 && bpc == 16) {
-               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
-               stbi__uint16 val = channel == 3 ? 65535 : 0;
-               for (i = 0; i < pixelCount; i++, q += 4)
-                  *q = val;
-            } else {
-               stbi_uc *p = out+channel;
-               stbi_uc val = channel == 3 ? 255 : 0;
-               for (i = 0; i < pixelCount; i++, p += 4)
-                  *p = val;
-            }
-         } else {
-            if (ri->bits_per_channel == 16) {    // output bpc
-               stbi__uint16 *q = ((stbi__uint16 *) out) + channel;
-               for (i = 0; i < pixelCount; i++, q += 4)
-                  *q = (stbi__uint16) stbi__get16be(s);
-            } else {
-               stbi_uc *p = out+channel;
-               if (bitdepth == 16) {  // input bpc
-                  for (i = 0; i < pixelCount; i++, p += 4)
-                     *p = (stbi_uc) (stbi__get16be(s) >> 8);
-               } else {
-                  for (i = 0; i < pixelCount; i++, p += 4)
-                     *p = stbi__get8(s);
-               }
-            }
-         }
-      }
-   }
-
-   // remove weird white matte from PSD
-   if (channelCount >= 4) {
-      if (ri->bits_per_channel == 16) {
-         for (i=0; i < w*h; ++i) {
-            stbi__uint16 *pixel = (stbi__uint16 *) out + 4*i;
-            if (pixel[3] != 0 && pixel[3] != 65535) {
-               float a = pixel[3] / 65535.0f;
-               float ra = 1.0f / a;
-               float inv_a = 65535.0f * (1 - ra);
-               pixel[0] = (stbi__uint16) (pixel[0]*ra + inv_a);
-               pixel[1] = (stbi__uint16) (pixel[1]*ra + inv_a);
-               pixel[2] = (stbi__uint16) (pixel[2]*ra + inv_a);
-            }
-         }
-      } else {
-         for (i=0; i < w*h; ++i) {
-            unsigned char *pixel = out + 4*i;
-            if (pixel[3] != 0 && pixel[3] != 255) {
-               float a = pixel[3] / 255.0f;
-               float ra = 1.0f / a;
-               float inv_a = 255.0f * (1 - ra);
-               pixel[0] = (unsigned char) (pixel[0]*ra + inv_a);
-               pixel[1] = (unsigned char) (pixel[1]*ra + inv_a);
-               pixel[2] = (unsigned char) (pixel[2]*ra + inv_a);
-            }
-         }
-      }
-   }
-
-   // convert to desired output format
-   if (req_comp && req_comp != 4) {
-      if (ri->bits_per_channel == 16)
-         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, 4, req_comp, w, h);
-      else
-         out = stbi__convert_format(out, 4, req_comp, w, h);
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-
-   if (comp) *comp = 4;
-   *y = h;
-   *x = w;
-
-   return out;
-}
-#endif
-
-// *************************************************************************************************
-// Softimage PIC loader
-// by Tom Seddon
-//
-// See http://softimage.wiki.softimage.com/index.php/INFO:_PIC_file_format
-// See http://ozviz.wasp.uwa.edu.au/~pbourke/dataformats/softimagepic/
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_is4(stbi__context *s,const char *str)
-{
-   int i;
-   for (i=0; i<4; ++i)
-      if (stbi__get8(s) != (stbi_uc)str[i])
-         return 0;
-
-   return 1;
-}
-
-static int stbi__pic_test_core(stbi__context *s)
-{
-   int i;
-
-   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34"))
-      return 0;
-
-   for(i=0;i<84;++i)
-      stbi__get8(s);
-
-   if (!stbi__pic_is4(s,"PICT"))
-      return 0;
-
-   return 1;
-}
-
-typedef struct
-{
-   stbi_uc size,type,channel;
-} stbi__pic_packet;
-
-static stbi_uc *stbi__readval(stbi__context *s, int channel, stbi_uc *dest)
-{
-   int mask=0x80, i;
-
-   for (i=0; i<4; ++i, mask>>=1) {
-      if (channel & mask) {
-         if (stbi__at_eof(s)) return stbi__errpuc("bad file","PIC file too short");
-         dest[i]=stbi__get8(s);
-      }
-   }
-
-   return dest;
-}
-
-static void stbi__copyval(int channel,stbi_uc *dest,const stbi_uc *src)
-{
-   int mask=0x80,i;
-
-   for (i=0;i<4; ++i, mask>>=1)
-      if (channel&mask)
-         dest[i]=src[i];
-}
-
-static stbi_uc *stbi__pic_load_core(stbi__context *s,int width,int height,int *comp, stbi_uc *result)
-{
-   int act_comp=0,num_packets=0,y,chained;
-   stbi__pic_packet packets[10];
-
-   // this will (should...) cater for even some bizarre stuff like having data
-    // for the same channel in multiple packets.
-   do {
-      stbi__pic_packet *packet;
-
-      if (num_packets==sizeof(packets)/sizeof(packets[0]))
-         return stbi__errpuc("bad format","too many packets");
-
-      packet = &packets[num_packets++];
-
-      chained = stbi__get8(s);
-      packet->size    = stbi__get8(s);
-      packet->type    = stbi__get8(s);
-      packet->channel = stbi__get8(s);
-
-      act_comp |= packet->channel;
-
-      if (stbi__at_eof(s))          return stbi__errpuc("bad file","file too short (reading packets)");
-      if (packet->size != 8)  return stbi__errpuc("bad format","packet isn't 8bpp");
-   } while (chained);
-
-   *comp = (act_comp & 0x10 ? 4 : 3); // has alpha channel?
-
-   for(y=0; y<height; ++y) {
-      int packet_idx;
-
-      for(packet_idx=0; packet_idx < num_packets; ++packet_idx) {
-         stbi__pic_packet *packet = &packets[packet_idx];
-         stbi_uc *dest = result+y*width*4;
-
-         switch (packet->type) {
-            default:
-               return stbi__errpuc("bad format","packet has bad compression type");
-
-            case 0: {//uncompressed
-               int x;
-
-               for(x=0;x<width;++x, dest+=4)
-                  if (!stbi__readval(s,packet->channel,dest))
-                     return 0;
-               break;
-            }
-
-            case 1://Pure RLE
-               {
-                  int left=width, i;
-
-                  while (left>0) {
-                     stbi_uc count,value[4];
-
-                     count=stbi__get8(s);
-                     if (stbi__at_eof(s))   return stbi__errpuc("bad file","file too short (pure read count)");
-
-                     if (count > left)
-                        count = (stbi_uc) left;
-
-                     if (!stbi__readval(s,packet->channel,value))  return 0;
-
-                     for(i=0; i<count; ++i,dest+=4)
-                        stbi__copyval(packet->channel,dest,value);
-                     left -= count;
-                  }
-               }
-               break;
-
-            case 2: {//Mixed RLE
-               int left=width;
-               while (left>0) {
-                  int count = stbi__get8(s), i;
-                  if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (mixed read count)");
-
-                  if (count >= 128) { // Repeated
-                     stbi_uc value[4];
-
-                     if (count==128)
-                        count = stbi__get16be(s);
-                     else
-                        count -= 127;
-                     if (count > left)
-                        return stbi__errpuc("bad file","scanline overrun");
-
-                     if (!stbi__readval(s,packet->channel,value))
-                        return 0;
-
-                     for(i=0;i<count;++i, dest += 4)
-                        stbi__copyval(packet->channel,dest,value);
-                  } else { // Raw
-                     ++count;
-                     if (count>left) return stbi__errpuc("bad file","scanline overrun");
-
-                     for(i=0;i<count;++i, dest+=4)
-                        if (!stbi__readval(s,packet->channel,dest))
-                           return 0;
-                  }
-                  left-=count;
-               }
-               break;
-            }
-         }
-      }
-   }
-
-   return result;
-}
-
-static void *stbi__pic_load(stbi__context *s,int *px,int *py,int *comp,int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *result;
-   int i, x,y, internal_comp;
-   STBI_NOTUSED(ri);
-
-   if (!comp) comp = &internal_comp;
-
-   for (i=0; i<92; ++i)
-      stbi__get8(s);
-
-   x = stbi__get16be(s);
-   y = stbi__get16be(s);
-
-   if (y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   if (stbi__at_eof(s))  return stbi__errpuc("bad file","file too short (pic header)");
-   if (!stbi__mad3sizes_valid(x, y, 4, 0)) return stbi__errpuc("too large", "PIC image too large to decode");
-
-   stbi__get32be(s); //skip `ratio'
-   stbi__get16be(s); //skip `fields'
-   stbi__get16be(s); //skip `pad'
-
-   // intermediate buffer is RGBA
-   result = (stbi_uc *) stbi__malloc_mad3(x, y, 4, 0);
-   if (!result) return stbi__errpuc("outofmem", "Out of memory");
-   memset(result, 0xff, x*y*4);
-
-   if (!stbi__pic_load_core(s,x,y,comp, result)) {
-      STBI_FREE(result);
-      result=0;
-   }
-   *px = x;
-   *py = y;
-   if (req_comp == 0) req_comp = *comp;
-   result=stbi__convert_format(result,4,req_comp,x,y);
-
-   return result;
-}
-
-static int stbi__pic_test(stbi__context *s)
-{
-   int r = stbi__pic_test_core(s);
-   stbi__rewind(s);
-   return r;
-}
-#endif
-
-// *************************************************************************************************
-// GIF loader -- public domain by Jean-Marc Lienher -- simplified/shrunk by stb
-
-#ifndef STBI_NO_GIF
-typedef struct
-{
-   stbi__int16 prefix;
-   stbi_uc first;
-   stbi_uc suffix;
-} stbi__gif_lzw;
-
-typedef struct
-{
-   int w,h;
-   stbi_uc *out;                 // output buffer (always 4 components)
-   stbi_uc *background;          // The current "background" as far as a gif is concerned
-   stbi_uc *history;
-   int flags, bgindex, ratio, transparent, eflags;
-   stbi_uc  pal[256][4];
-   stbi_uc lpal[256][4];
-   stbi__gif_lzw codes[8192];
-   stbi_uc *color_table;
-   int parse, step;
-   int lflags;
-   int start_x, start_y;
-   int max_x, max_y;
-   int cur_x, cur_y;
-   int line_size;
-   int delay;
-} stbi__gif;
-
-static int stbi__gif_test_raw(stbi__context *s)
-{
-   int sz;
-   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8') return 0;
-   sz = stbi__get8(s);
-   if (sz != '9' && sz != '7') return 0;
-   if (stbi__get8(s) != 'a') return 0;
-   return 1;
-}
-
-static int stbi__gif_test(stbi__context *s)
-{
-   int r = stbi__gif_test_raw(s);
-   stbi__rewind(s);
-   return r;
-}
-
-static void stbi__gif_parse_colortable(stbi__context *s, stbi_uc pal[256][4], int num_entries, int transp)
-{
-   int i;
-   for (i=0; i < num_entries; ++i) {
-      pal[i][2] = stbi__get8(s);
-      pal[i][1] = stbi__get8(s);
-      pal[i][0] = stbi__get8(s);
-      pal[i][3] = transp == i ? 0 : 255;
-   }
-}
-
-static int stbi__gif_header(stbi__context *s, stbi__gif *g, int *comp, int is_info)
-{
-   stbi_uc version;
-   if (stbi__get8(s) != 'G' || stbi__get8(s) != 'I' || stbi__get8(s) != 'F' || stbi__get8(s) != '8')
-      return stbi__err("not GIF", "Corrupt GIF");
-
-   version = stbi__get8(s);
-   if (version != '7' && version != '9')    return stbi__err("not GIF", "Corrupt GIF");
-   if (stbi__get8(s) != 'a')                return stbi__err("not GIF", "Corrupt GIF");
-
-   stbi__g_failure_reason = "";
-   g->w = stbi__get16le(s);
-   g->h = stbi__get16le(s);
-   g->flags = stbi__get8(s);
-   g->bgindex = stbi__get8(s);
-   g->ratio = stbi__get8(s);
-   g->transparent = -1;
-
-   if (g->w > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-   if (g->h > STBI_MAX_DIMENSIONS) return stbi__err("too large","Very large image (corrupt?)");
-
-   if (comp != 0) *comp = 4;  // can't actually tell whether it's 3 or 4 until we parse the comments
-
-   if (is_info) return 1;
-
-   if (g->flags & 0x80)
-      stbi__gif_parse_colortable(s,g->pal, 2 << (g->flags & 7), -1);
-
-   return 1;
-}
-
-static int stbi__gif_info_raw(stbi__context *s, int *x, int *y, int *comp)
-{
-   stbi__gif* g = (stbi__gif*) stbi__malloc(sizeof(stbi__gif));
-   if (!g) return stbi__err("outofmem", "Out of memory");
-   if (!stbi__gif_header(s, g, comp, 1)) {
-      STBI_FREE(g);
-      stbi__rewind( s );
-      return 0;
-   }
-   if (x) *x = g->w;
-   if (y) *y = g->h;
-   STBI_FREE(g);
-   return 1;
-}
-
-static void stbi__out_gif_code(stbi__gif *g, stbi__uint16 code)
-{
-   stbi_uc *p, *c;
-   int idx;
-
-   // recurse to decode the prefixes, since the linked-list is backwards,
-   // and working backwards through an interleaved image would be nasty
-   if (g->codes[code].prefix >= 0)
-      stbi__out_gif_code(g, g->codes[code].prefix);
-
-   if (g->cur_y >= g->max_y) return;
-
-   idx = g->cur_x + g->cur_y;
-   p = &g->out[idx];
-   g->history[idx / 4] = 1;
-
-   c = &g->color_table[g->codes[code].suffix * 4];
-   if (c[3] > 128) { // don't render transparent pixels;
-      p[0] = c[2];
-      p[1] = c[1];
-      p[2] = c[0];
-      p[3] = c[3];
-   }
-   g->cur_x += 4;
-
-   if (g->cur_x >= g->max_x) {
-      g->cur_x = g->start_x;
-      g->cur_y += g->step;
-
-      while (g->cur_y >= g->max_y && g->parse > 0) {
-         g->step = (1 << g->parse) * g->line_size;
-         g->cur_y = g->start_y + (g->step >> 1);
-         --g->parse;
-      }
-   }
-}
-
-static stbi_uc *stbi__process_gif_raster(stbi__context *s, stbi__gif *g)
-{
-   stbi_uc lzw_cs;
-   stbi__int32 len, init_code;
-   stbi__uint32 first;
-   stbi__int32 codesize, codemask, avail, oldcode, bits, valid_bits, clear;
-   stbi__gif_lzw *p;
-
-   lzw_cs = stbi__get8(s);
-   if (lzw_cs > 12) return NULL;
-   clear = 1 << lzw_cs;
-   first = 1;
-   codesize = lzw_cs + 1;
-   codemask = (1 << codesize) - 1;
-   bits = 0;
-   valid_bits = 0;
-   for (init_code = 0; init_code < clear; init_code++) {
-      g->codes[init_code].prefix = -1;
-      g->codes[init_code].first = (stbi_uc) init_code;
-      g->codes[init_code].suffix = (stbi_uc) init_code;
-   }
-
-   // support no starting clear code
-   avail = clear+2;
-   oldcode = -1;
-
-   len = 0;
-   for(;;) {
-      if (valid_bits < codesize) {
-         if (len == 0) {
-            len = stbi__get8(s); // start new block
-            if (len == 0)
-               return g->out;
-         }
-         --len;
-         bits |= (stbi__int32) stbi__get8(s) << valid_bits;
-         valid_bits += 8;
-      } else {
-         stbi__int32 code = bits & codemask;
-         bits >>= codesize;
-         valid_bits -= codesize;
-         // @OPTIMIZE: is there some way we can accelerate the non-clear path?
-         if (code == clear) {  // clear code
-            codesize = lzw_cs + 1;
-            codemask = (1 << codesize) - 1;
-            avail = clear + 2;
-            oldcode = -1;
-            first = 0;
-         } else if (code == clear + 1) { // end of stream code
-            stbi__skip(s, len);
-            while ((len = stbi__get8(s)) > 0)
-               stbi__skip(s,len);
-            return g->out;
-         } else if (code <= avail) {
-            if (first) {
-               return stbi__errpuc("no clear code", "Corrupt GIF");
-            }
-
-            if (oldcode >= 0) {
-               p = &g->codes[avail++];
-               if (avail > 8192) {
-                  return stbi__errpuc("too many codes", "Corrupt GIF");
-               }
-
-               p->prefix = (stbi__int16) oldcode;
-               p->first = g->codes[oldcode].first;
-               p->suffix = (code == avail) ? p->first : g->codes[code].first;
-            } else if (code == avail)
-               return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-
-            stbi__out_gif_code(g, (stbi__uint16) code);
-
-            if ((avail & codemask) == 0 && avail <= 0x0FFF) {
-               codesize++;
-               codemask = (1 << codesize) - 1;
-            }
-
-            oldcode = code;
-         } else {
-            return stbi__errpuc("illegal code in raster", "Corrupt GIF");
-         }
-      }
-   }
-}
-
-// this function is designed to support animated gifs, although stb_image doesn't support it
-// two back is the image from two frames ago, used for a very specific disposal format
-static stbi_uc *stbi__gif_load_next(stbi__context *s, stbi__gif *g, int *comp, int req_comp, stbi_uc *two_back)
-{
-   int dispose;
-   int first_frame;
-   int pi;
-   int pcount;
-   STBI_NOTUSED(req_comp);
-
-   // on first frame, any non-written pixels get the background colour (non-transparent)
-   first_frame = 0;
-   if (g->out == 0) {
-      if (!stbi__gif_header(s, g, comp,0)) return 0; // stbi__g_failure_reason set by stbi__gif_header
-      if (!stbi__mad3sizes_valid(4, g->w, g->h, 0))
-         return stbi__errpuc("too large", "GIF image is too large");
-      pcount = g->w * g->h;
-      g->out = (stbi_uc *) stbi__malloc(4 * pcount);
-      g->background = (stbi_uc *) stbi__malloc(4 * pcount);
-      g->history = (stbi_uc *) stbi__malloc(pcount);
-      if (!g->out || !g->background || !g->history)
-         return stbi__errpuc("outofmem", "Out of memory");
-
-      // image is treated as "transparent" at the start - ie, nothing overwrites the current background;
-      // background colour is only used for pixels that are not rendered first frame, after that "background"
-      // color refers to the color that was there the previous frame.
-      memset(g->out, 0x00, 4 * pcount);
-      memset(g->background, 0x00, 4 * pcount); // state of the background (starts transparent)
-      memset(g->history, 0x00, pcount);        // pixels that were affected previous frame
-      first_frame = 1;
-   } else {
-      // second frame - how do we dispose of the previous one?
-      dispose = (g->eflags & 0x1C) >> 2;
-      pcount = g->w * g->h;
-
-      if ((dispose == 3) && (two_back == 0)) {
-         dispose = 2; // if I don't have an image to revert back to, default to the old background
-      }
-
-      if (dispose == 3) { // use previous graphic
-         for (pi = 0; pi < pcount; ++pi) {
-            if (g->history[pi]) {
-               memcpy( &g->out[pi * 4], &two_back[pi * 4], 4 );
-            }
-         }
-      } else if (dispose == 2) {
-         // restore what was changed last frame to background before that frame;
-         for (pi = 0; pi < pcount; ++pi) {
-            if (g->history[pi]) {
-               memcpy( &g->out[pi * 4], &g->background[pi * 4], 4 );
-            }
-         }
-      } else {
-         // This is a non-disposal case eithe way, so just
-         // leave the pixels as is, and they will become the new background
-         // 1: do not dispose
-         // 0:  not specified.
-      }
-
-      // background is what out is after the undoing of the previou frame;
-      memcpy( g->background, g->out, 4 * g->w * g->h );
-   }
-
-   // clear my history;
-   memset( g->history, 0x00, g->w * g->h );        // pixels that were affected previous frame
-
-   for (;;) {
-      int tag = stbi__get8(s);
-      switch (tag) {
-         case 0x2C: /* Image Descriptor */
-         {
-            stbi__int32 x, y, w, h;
-            stbi_uc *o;
-
-            x = stbi__get16le(s);
-            y = stbi__get16le(s);
-            w = stbi__get16le(s);
-            h = stbi__get16le(s);
-            if (((x + w) > (g->w)) || ((y + h) > (g->h)))
-               return stbi__errpuc("bad Image Descriptor", "Corrupt GIF");
-
-            g->line_size = g->w * 4;
-            g->start_x = x * 4;
-            g->start_y = y * g->line_size;
-            g->max_x   = g->start_x + w * 4;
-            g->max_y   = g->start_y + h * g->line_size;
-            g->cur_x   = g->start_x;
-            g->cur_y   = g->start_y;
-
-            // if the width of the specified rectangle is 0, that means
-            // we may not see *any* pixels or the image is malformed;
-            // to make sure this is caught, move the current y down to
-            // max_y (which is what out_gif_code checks).
-            if (w == 0)
-               g->cur_y = g->max_y;
-
-            g->lflags = stbi__get8(s);
-
-            if (g->lflags & 0x40) {
-               g->step = 8 * g->line_size; // first interlaced spacing
-               g->parse = 3;
-            } else {
-               g->step = g->line_size;
-               g->parse = 0;
-            }
-
-            if (g->lflags & 0x80) {
-               stbi__gif_parse_colortable(s,g->lpal, 2 << (g->lflags & 7), g->eflags & 0x01 ? g->transparent : -1);
-               g->color_table = (stbi_uc *) g->lpal;
-            } else if (g->flags & 0x80) {
-               g->color_table = (stbi_uc *) g->pal;
-            } else
-               return stbi__errpuc("missing color table", "Corrupt GIF");
-
-            o = stbi__process_gif_raster(s, g);
-            if (!o) return NULL;
-
-            // if this was the first frame,
-            pcount = g->w * g->h;
-            if (first_frame && (g->bgindex > 0)) {
-               // if first frame, any pixel not drawn to gets the background color
-               for (pi = 0; pi < pcount; ++pi) {
-                  if (g->history[pi] == 0) {
-                     g->pal[g->bgindex][3] = 255; // just in case it was made transparent, undo that; It will be reset next frame if need be;
-                     memcpy( &g->out[pi * 4], &g->pal[g->bgindex], 4 );
-                  }
-               }
-            }
-
-            return o;
-         }
-
-         case 0x21: // Comment Extension.
-         {
-            int len;
-            int ext = stbi__get8(s);
-            if (ext == 0xF9) { // Graphic Control Extension.
-               len = stbi__get8(s);
-               if (len == 4) {
-                  g->eflags = stbi__get8(s);
-                  g->delay = 10 * stbi__get16le(s); // delay - 1/100th of a second, saving as 1/1000ths.
-
-                  // unset old transparent
-                  if (g->transparent >= 0) {
-                     g->pal[g->transparent][3] = 255;
-                  }
-                  if (g->eflags & 0x01) {
-                     g->transparent = stbi__get8(s);
-                     if (g->transparent >= 0) {
-                        g->pal[g->transparent][3] = 0;
-                     }
-                  } else {
-                     // don't need transparent
-                     stbi__skip(s, 1);
-                     g->transparent = -1;
-                  }
-               } else {
-                  stbi__skip(s, len);
-                  break;
-               }
-            }
-            while ((len = stbi__get8(s)) != 0) {
-               stbi__skip(s, len);
-            }
-            break;
-         }
-
-         case 0x3B: // gif stream termination code
-            return (stbi_uc *) s; // using '1' causes warning on some compilers
-
-         default:
-            return stbi__errpuc("unknown code", "Corrupt GIF");
-      }
-   }
-}
-
-static void *stbi__load_gif_main_outofmem(stbi__gif *g, stbi_uc *out, int **delays)
-{
-   STBI_FREE(g->out);
-   STBI_FREE(g->history);
-   STBI_FREE(g->background);
-
-   if (out) STBI_FREE(out);
-   if (delays && *delays) STBI_FREE(*delays);
-   return stbi__errpuc("outofmem", "Out of memory");
-}
-
-static void *stbi__load_gif_main(stbi__context *s, int **delays, int *x, int *y, int *z, int *comp, int req_comp)
-{
-   if (stbi__gif_test(s)) {
-      int layers = 0;
-      stbi_uc *u = 0;
-      stbi_uc *out = 0;
-      stbi_uc *two_back = 0;
-      stbi__gif g;
-      int stride;
-      int out_size = 0;
-      int delays_size = 0;
-
-      STBI_NOTUSED(out_size);
-      STBI_NOTUSED(delays_size);
-
-      memset(&g, 0, sizeof(g));
-      if (delays) {
-         *delays = 0;
-      }
-
-      do {
-         u = stbi__gif_load_next(s, &g, comp, req_comp, two_back);
-         if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
-
-         if (u) {
-            *x = g.w;
-            *y = g.h;
-            ++layers;
-            stride = g.w * g.h * 4;
-
-            if (out) {
-               void *tmp = (stbi_uc*) STBI_REALLOC_SIZED( out, out_size, layers * stride );
-               if (!tmp)
-                  return stbi__load_gif_main_outofmem(&g, out, delays);
-               else {
-                   out = (stbi_uc*) tmp;
-                   out_size = layers * stride;
-               }
-
-               if (delays) {
-                  int *new_delays = (int*) STBI_REALLOC_SIZED( *delays, delays_size, sizeof(int) * layers );
-                  if (!new_delays)
-                     return stbi__load_gif_main_outofmem(&g, out, delays);
-                  *delays = new_delays;
-                  delays_size = layers * sizeof(int);
-               }
-            } else {
-               out = (stbi_uc*)stbi__malloc( layers * stride );
-               if (!out)
-                  return stbi__load_gif_main_outofmem(&g, out, delays);
-               out_size = layers * stride;
-               if (delays) {
-                  *delays = (int*) stbi__malloc( layers * sizeof(int) );
-                  if (!*delays)
-                     return stbi__load_gif_main_outofmem(&g, out, delays);
-                  delays_size = layers * sizeof(int);
-               }
-            }
-            memcpy( out + ((layers - 1) * stride), u, stride );
-            if (layers >= 2) {
-               two_back = out - 2 * stride;
-            }
-
-            if (delays) {
-               (*delays)[layers - 1U] = g.delay;
-            }
-         }
-      } while (u != 0);
-
-      // free temp buffer;
-      STBI_FREE(g.out);
-      STBI_FREE(g.history);
-      STBI_FREE(g.background);
-
-      // do the final conversion after loading everything;
-      if (req_comp && req_comp != 4)
-         out = stbi__convert_format(out, 4, req_comp, layers * g.w, g.h);
-
-      *z = layers;
-      return out;
-   } else {
-      return stbi__errpuc("not GIF", "Image was not as a gif type.");
-   }
-}
-
-static void *stbi__gif_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *u = 0;
-   stbi__gif g;
-   memset(&g, 0, sizeof(g));
-   STBI_NOTUSED(ri);
-
-   u = stbi__gif_load_next(s, &g, comp, req_comp, 0);
-   if (u == (stbi_uc *) s) u = 0;  // end of animated gif marker
-   if (u) {
-      *x = g.w;
-      *y = g.h;
-
-      // moved conversion to after successful load so that the same
-      // can be done for multiple frames.
-      if (req_comp && req_comp != 4)
-         u = stbi__convert_format(u, 4, req_comp, g.w, g.h);
-   } else if (g.out) {
-      // if there was an error and we allocated an image buffer, free it!
-      STBI_FREE(g.out);
-   }
-
-   // free buffers needed for multiple frame loading;
-   STBI_FREE(g.history);
-   STBI_FREE(g.background);
-
-   return u;
-}
-
-static int stbi__gif_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   return stbi__gif_info_raw(s,x,y,comp);
-}
-#endif
-
-// *************************************************************************************************
-// Radiance RGBE HDR loader
-// originally by Nicolas Schulz
-#ifndef STBI_NO_HDR
-static int stbi__hdr_test_core(stbi__context *s, const char *signature)
-{
-   int i;
-   for (i=0; signature[i]; ++i)
-      if (stbi__get8(s) != signature[i])
-          return 0;
-   stbi__rewind(s);
-   return 1;
-}
-
-static int stbi__hdr_test(stbi__context* s)
-{
-   int r = stbi__hdr_test_core(s, "#?RADIANCE\n");
-   stbi__rewind(s);
-   if(!r) {
-       r = stbi__hdr_test_core(s, "#?RGBE\n");
-       stbi__rewind(s);
-   }
-   return r;
-}
-
-#define STBI__HDR_BUFLEN  1024
-static char *stbi__hdr_gettoken(stbi__context *z, char *buffer)
-{
-   int len=0;
-   char c = '\0';
-
-   c = (char) stbi__get8(z);
-
-   while (!stbi__at_eof(z) && c != '\n') {
-      buffer[len++] = c;
-      if (len == STBI__HDR_BUFLEN-1) {
-         // flush to end of line
-         while (!stbi__at_eof(z) && stbi__get8(z) != '\n')
-            ;
-         break;
-      }
-      c = (char) stbi__get8(z);
-   }
-
-   buffer[len] = 0;
-   return buffer;
-}
-
-static void stbi__hdr_convert(float *output, stbi_uc *input, int req_comp)
-{
-   if ( input[3] != 0 ) {
-      float f1;
-      // Exponent
-      f1 = (float) ldexp(1.0f, input[3] - (int)(128 + 8));
-      if (req_comp <= 2)
-         output[0] = (input[0] + input[1] + input[2]) * f1 / 3;
-      else {
-         output[0] = input[0] * f1;
-         output[1] = input[1] * f1;
-         output[2] = input[2] * f1;
-      }
-      if (req_comp == 2) output[1] = 1;
-      if (req_comp == 4) output[3] = 1;
-   } else {
-      switch (req_comp) {
-         case 4: output[3] = 1; /* fallthrough */
-         case 3: output[0] = output[1] = output[2] = 0;
-                 break;
-         case 2: output[1] = 1; /* fallthrough */
-         case 1: output[0] = 0;
-                 break;
-      }
-   }
-}
-
-static float *stbi__hdr_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   char buffer[STBI__HDR_BUFLEN];
-   char *token;
-   int valid = 0;
-   int width, height;
-   stbi_uc *scanline;
-   float *hdr_data;
-   int len;
-   unsigned char count, value;
-   int i, j, k, c1,c2, z;
-   const char *headerToken;
-   STBI_NOTUSED(ri);
-
-   // Check identifier
-   headerToken = stbi__hdr_gettoken(s,buffer);
-   if (strcmp(headerToken, "#?RADIANCE") != 0 && strcmp(headerToken, "#?RGBE") != 0)
-      return stbi__errpf("not HDR", "Corrupt HDR image");
-
-   // Parse header
-   for(;;) {
-      token = stbi__hdr_gettoken(s,buffer);
-      if (token[0] == 0) break;
-      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
-   }
-
-   if (!valid)    return stbi__errpf("unsupported format", "Unsupported HDR format");
-
-   // Parse width and height
-   // can't use sscanf() if we're not using stdio!
-   token = stbi__hdr_gettoken(s,buffer);
-   if (strncmp(token, "-Y ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-   token += 3;
-   height = (int) strtol(token, &token, 10);
-   while (*token == ' ') ++token;
-   if (strncmp(token, "+X ", 3))  return stbi__errpf("unsupported data layout", "Unsupported HDR format");
-   token += 3;
-   width = (int) strtol(token, NULL, 10);
-
-   if (height > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
-   if (width > STBI_MAX_DIMENSIONS) return stbi__errpf("too large","Very large image (corrupt?)");
-
-   *x = width;
-   *y = height;
-
-   if (comp) *comp = 3;
-   if (req_comp == 0) req_comp = 3;
-
-   if (!stbi__mad4sizes_valid(width, height, req_comp, sizeof(float), 0))
-      return stbi__errpf("too large", "HDR image is too large");
-
-   // Read data
-   hdr_data = (float *) stbi__malloc_mad4(width, height, req_comp, sizeof(float), 0);
-   if (!hdr_data)
-      return stbi__errpf("outofmem", "Out of memory");
-
-   // Load image data
-   // image data is stored as some number of sca
-   if ( width < 8 || width >= 32768) {
-      // Read flat data
-      for (j=0; j < height; ++j) {
-         for (i=0; i < width; ++i) {
-            stbi_uc rgbe[4];
-           main_decode_loop:
-            stbi__getn(s, rgbe, 4);
-            stbi__hdr_convert(hdr_data + j * width * req_comp + i * req_comp, rgbe, req_comp);
-         }
-      }
-   } else {
-      // Read RLE-encoded data
-      scanline = NULL;
-
-      for (j = 0; j < height; ++j) {
-         c1 = stbi__get8(s);
-         c2 = stbi__get8(s);
-         len = stbi__get8(s);
-         if (c1 != 2 || c2 != 2 || (len & 0x80)) {
-            // not run-length encoded, so we have to actually use THIS data as a decoded
-            // pixel (note this can't be a valid pixel--one of RGB must be >= 128)
-            stbi_uc rgbe[4];
-            rgbe[0] = (stbi_uc) c1;
-            rgbe[1] = (stbi_uc) c2;
-            rgbe[2] = (stbi_uc) len;
-            rgbe[3] = (stbi_uc) stbi__get8(s);
-            stbi__hdr_convert(hdr_data, rgbe, req_comp);
-            i = 1;
-            j = 0;
-            STBI_FREE(scanline);
-            goto main_decode_loop; // yes, this makes no sense
-         }
-         len <<= 8;
-         len |= stbi__get8(s);
-         if (len != width) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("invalid decoded scanline length", "corrupt HDR"); }
-         if (scanline == NULL) {
-            scanline = (stbi_uc *) stbi__malloc_mad2(width, 4, 0);
-            if (!scanline) {
-               STBI_FREE(hdr_data);
-               return stbi__errpf("outofmem", "Out of memory");
-            }
-         }
-
-         for (k = 0; k < 4; ++k) {
-            int nleft;
-            i = 0;
-            while ((nleft = width - i) > 0) {
-               count = stbi__get8(s);
-               if (count > 128) {
-                  // Run
-                  value = stbi__get8(s);
-                  count -= 128;
-                  if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
-                  for (z = 0; z < count; ++z)
-                     scanline[i++ * 4 + k] = value;
-               } else {
-                  // Dump
-                  if ((count == 0) || (count > nleft)) { STBI_FREE(hdr_data); STBI_FREE(scanline); return stbi__errpf("corrupt", "bad RLE data in HDR"); }
-                  for (z = 0; z < count; ++z)
-                     scanline[i++ * 4 + k] = stbi__get8(s);
-               }
-            }
-         }
-         for (i=0; i < width; ++i)
-            stbi__hdr_convert(hdr_data+(j*width + i)*req_comp, scanline + i*4, req_comp);
-      }
-      if (scanline)
-         STBI_FREE(scanline);
-   }
-
-   return hdr_data;
-}
-
-static int stbi__hdr_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   char buffer[STBI__HDR_BUFLEN];
-   char *token;
-   int valid = 0;
-   int dummy;
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   if (stbi__hdr_test(s) == 0) {
-       stbi__rewind( s );
-       return 0;
-   }
-
-   for(;;) {
-      token = stbi__hdr_gettoken(s,buffer);
-      if (token[0] == 0) break;
-      if (strcmp(token, "FORMAT=32-bit_rle_rgbe") == 0) valid = 1;
-   }
-
-   if (!valid) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token = stbi__hdr_gettoken(s,buffer);
-   if (strncmp(token, "-Y ", 3)) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token += 3;
-   *y = (int) strtol(token, &token, 10);
-   while (*token == ' ') ++token;
-   if (strncmp(token, "+X ", 3)) {
-       stbi__rewind( s );
-       return 0;
-   }
-   token += 3;
-   *x = (int) strtol(token, NULL, 10);
-   *comp = 3;
-   return 1;
-}
-#endif // STBI_NO_HDR
-
-#ifndef STBI_NO_BMP
-static int stbi__bmp_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   void *p;
-   stbi__bmp_data info;
-
-   info.all_a = 255;
-   p = stbi__bmp_parse_header(s, &info);
-   if (p == NULL) {
-      stbi__rewind( s );
-      return 0;
-   }
-   if (x) *x = s->img_x;
-   if (y) *y = s->img_y;
-   if (comp) {
-      if (info.bpp == 24 && info.ma == 0xff000000)
-         *comp = 3;
-      else
-         *comp = info.ma ? 4 : 3;
-   }
-   return 1;
-}
-#endif
-
-#ifndef STBI_NO_PSD
-static int stbi__psd_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int channelCount, dummy, depth;
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-   if (stbi__get32be(s) != 0x38425053) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 1) {
-       stbi__rewind( s );
-       return 0;
-   }
-   stbi__skip(s, 6);
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   *y = stbi__get32be(s);
-   *x = stbi__get32be(s);
-   depth = stbi__get16be(s);
-   if (depth != 8 && depth != 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 3) {
-       stbi__rewind( s );
-       return 0;
-   }
-   *comp = 4;
-   return 1;
-}
-
-static int stbi__psd_is16(stbi__context *s)
-{
-   int channelCount, depth;
-   if (stbi__get32be(s) != 0x38425053) {
-       stbi__rewind( s );
-       return 0;
-   }
-   if (stbi__get16be(s) != 1) {
-       stbi__rewind( s );
-       return 0;
-   }
-   stbi__skip(s, 6);
-   channelCount = stbi__get16be(s);
-   if (channelCount < 0 || channelCount > 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   STBI_NOTUSED(stbi__get32be(s));
-   STBI_NOTUSED(stbi__get32be(s));
-   depth = stbi__get16be(s);
-   if (depth != 16) {
-       stbi__rewind( s );
-       return 0;
-   }
-   return 1;
-}
-#endif
-
-#ifndef STBI_NO_PIC
-static int stbi__pic_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int act_comp=0,num_packets=0,chained,dummy;
-   stbi__pic_packet packets[10];
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   if (!stbi__pic_is4(s,"\x53\x80\xF6\x34")) {
-      stbi__rewind(s);
-      return 0;
-   }
-
-   stbi__skip(s, 88);
-
-   *x = stbi__get16be(s);
-   *y = stbi__get16be(s);
-   if (stbi__at_eof(s)) {
-      stbi__rewind( s);
-      return 0;
-   }
-   if ( (*x) != 0 && (1 << 28) / (*x) < (*y)) {
-      stbi__rewind( s );
-      return 0;
-   }
-
-   stbi__skip(s, 8);
-
-   do {
-      stbi__pic_packet *packet;
-
-      if (num_packets==sizeof(packets)/sizeof(packets[0]))
-         return 0;
-
-      packet = &packets[num_packets++];
-      chained = stbi__get8(s);
-      packet->size    = stbi__get8(s);
-      packet->type    = stbi__get8(s);
-      packet->channel = stbi__get8(s);
-      act_comp |= packet->channel;
-
-      if (stbi__at_eof(s)) {
-          stbi__rewind( s );
-          return 0;
-      }
-      if (packet->size != 8) {
-          stbi__rewind( s );
-          return 0;
-      }
-   } while (chained);
-
-   *comp = (act_comp & 0x10 ? 4 : 3);
-
-   return 1;
-}
-#endif
-
-// *************************************************************************************************
-// Portable Gray Map and Portable Pixel Map loader
-// by Ken Miller
-//
-// PGM: http://netpbm.sourceforge.net/doc/pgm.html
-// PPM: http://netpbm.sourceforge.net/doc/ppm.html
-//
-// Known limitations:
-//    Does not support comments in the header section
-//    Does not support ASCII image data (formats P2 and P3)
-
-#ifndef STBI_NO_PNM
-
-static int      stbi__pnm_test(stbi__context *s)
-{
-   char p, t;
-   p = (char) stbi__get8(s);
-   t = (char) stbi__get8(s);
-   if (p != 'P' || (t != '5' && t != '6')) {
-       stbi__rewind( s );
-       return 0;
-   }
-   return 1;
-}
-
-static void *stbi__pnm_load(stbi__context *s, int *x, int *y, int *comp, int req_comp, stbi__result_info *ri)
-{
-   stbi_uc *out;
-   STBI_NOTUSED(ri);
-
-   ri->bits_per_channel = stbi__pnm_info(s, (int *)&s->img_x, (int *)&s->img_y, (int *)&s->img_n);
-   if (ri->bits_per_channel == 0)
-      return 0;
-
-   if (s->img_y > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-   if (s->img_x > STBI_MAX_DIMENSIONS) return stbi__errpuc("too large","Very large image (corrupt?)");
-
-   *x = s->img_x;
-   *y = s->img_y;
-   if (comp) *comp = s->img_n;
-
-   if (!stbi__mad4sizes_valid(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0))
-      return stbi__errpuc("too large", "PNM too large");
-
-   out = (stbi_uc *) stbi__malloc_mad4(s->img_n, s->img_x, s->img_y, ri->bits_per_channel / 8, 0);
-   if (!out) return stbi__errpuc("outofmem", "Out of memory");
-   if (!stbi__getn(s, out, s->img_n * s->img_x * s->img_y * (ri->bits_per_channel / 8))) {
-      STBI_FREE(out);
-      return stbi__errpuc("bad PNM", "PNM file truncated");
-   }
-
-   if (req_comp && req_comp != s->img_n) {
-      if (ri->bits_per_channel == 16) {
-         out = (stbi_uc *) stbi__convert_format16((stbi__uint16 *) out, s->img_n, req_comp, s->img_x, s->img_y);
-      } else {
-         out = stbi__convert_format(out, s->img_n, req_comp, s->img_x, s->img_y);
-      }
-      if (out == NULL) return out; // stbi__convert_format frees input on failure
-   }
-   return out;
-}
-
-static int      stbi__pnm_isspace(char c)
-{
-   return c == ' ' || c == '\t' || c == '\n' || c == '\v' || c == '\f' || c == '\r';
-}
-
-static void     stbi__pnm_skip_whitespace(stbi__context *s, char *c)
-{
-   for (;;) {
-      while (!stbi__at_eof(s) && stbi__pnm_isspace(*c))
-         *c = (char) stbi__get8(s);
-
-      if (stbi__at_eof(s) || *c != '#')
-         break;
-
-      while (!stbi__at_eof(s) && *c != '\n' && *c != '\r' )
-         *c = (char) stbi__get8(s);
-   }
-}
-
-static int      stbi__pnm_isdigit(char c)
-{
-   return c >= '0' && c <= '9';
-}
-
-static int      stbi__pnm_getinteger(stbi__context *s, char *c)
-{
-   int value = 0;
-
-   while (!stbi__at_eof(s) && stbi__pnm_isdigit(*c)) {
-      value = value*10 + (*c - '0');
-      *c = (char) stbi__get8(s);
-      if((value > 214748364) || (value == 214748364 && *c > '7'))
-          return stbi__err("integer parse overflow", "Parsing an integer in the PPM header overflowed a 32-bit int");
-   }
-
-   return value;
-}
-
-static int      stbi__pnm_info(stbi__context *s, int *x, int *y, int *comp)
-{
-   int maxv, dummy;
-   char c, p, t;
-
-   if (!x) x = &dummy;
-   if (!y) y = &dummy;
-   if (!comp) comp = &dummy;
-
-   stbi__rewind(s);
-
-   // Get identifier
-   p = (char) stbi__get8(s);
-   t = (char) stbi__get8(s);
-   if (p != 'P' || (t != '5' && t != '6')) {
-       stbi__rewind(s);
-       return 0;
-   }
-
-   *comp = (t == '6') ? 3 : 1;  // '5' is 1-component .pgm; '6' is 3-component .ppm
-
-   c = (char) stbi__get8(s);
-   stbi__pnm_skip_whitespace(s, &c);
-
-   *x = stbi__pnm_getinteger(s, &c); // read width
-   if(*x == 0)
-       return stbi__err("invalid width", "PPM image header had zero or overflowing width");
-   stbi__pnm_skip_whitespace(s, &c);
-
-   *y = stbi__pnm_getinteger(s, &c); // read height
-   if (*y == 0)
-       return stbi__err("invalid width", "PPM image header had zero or overflowing width");
-   stbi__pnm_skip_whitespace(s, &c);
-
-   maxv = stbi__pnm_getinteger(s, &c);  // read max value
-   if (maxv > 65535)
-      return stbi__err("max value > 65535", "PPM image supports only 8-bit and 16-bit images");
-   else if (maxv > 255)
-      return 16;
-   else
-      return 8;
-}
-
-static int stbi__pnm_is16(stbi__context *s)
-{
-   if (stbi__pnm_info(s, NULL, NULL, NULL) == 16)
-	   return 1;
-   return 0;
-}
-#endif
-
-static int stbi__info_main(stbi__context *s, int *x, int *y, int *comp)
-{
-   #ifndef STBI_NO_JPEG
-   if (stbi__jpeg_info(s, x, y, comp)) return 1;
-   #endif
-
-   #ifndef STBI_NO_PNG
-   if (stbi__png_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_GIF
-   if (stbi__gif_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_BMP
-   if (stbi__bmp_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PIC
-   if (stbi__pic_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_info(s, x, y, comp))  return 1;
-   #endif
-
-   #ifndef STBI_NO_HDR
-   if (stbi__hdr_info(s, x, y, comp))  return 1;
-   #endif
-
-   // test tga last because it's a crappy test!
-   #ifndef STBI_NO_TGA
-   if (stbi__tga_info(s, x, y, comp))
-       return 1;
-   #endif
-   return stbi__err("unknown image type", "Image not of any known type, or corrupt");
-}
-
-static int stbi__is_16_main(stbi__context *s)
-{
-   #ifndef STBI_NO_PNG
-   if (stbi__png_is16(s))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PSD
-   if (stbi__psd_is16(s))  return 1;
-   #endif
-
-   #ifndef STBI_NO_PNM
-   if (stbi__pnm_is16(s))  return 1;
-   #endif
-   return 0;
-}
-
-#ifndef STBI_NO_STDIO
-STBIDEF int stbi_info(char const *filename, int *x, int *y, int *comp)
-{
-    FILE *f = stbi__fopen(filename, "rb");
-    int result;
-    if (!f) return stbi__err("can't fopen", "Unable to open file");
-    result = stbi_info_from_file(f, x, y, comp);
-    fclose(f);
-    return result;
-}
-
-STBIDEF int stbi_info_from_file(FILE *f, int *x, int *y, int *comp)
-{
-   int r;
-   stbi__context s;
-   long pos = ftell(f);
-   stbi__start_file(&s, f);
-   r = stbi__info_main(&s,x,y,comp);
-   fseek(f,pos,SEEK_SET);
-   return r;
-}
-
-STBIDEF int stbi_is_16_bit(char const *filename)
-{
-    FILE *f = stbi__fopen(filename, "rb");
-    int result;
-    if (!f) return stbi__err("can't fopen", "Unable to open file");
-    result = stbi_is_16_bit_from_file(f);
-    fclose(f);
-    return result;
-}
-
-STBIDEF int stbi_is_16_bit_from_file(FILE *f)
-{
-   int r;
-   stbi__context s;
-   long pos = ftell(f);
-   stbi__start_file(&s, f);
-   r = stbi__is_16_main(&s);
-   fseek(f,pos,SEEK_SET);
-   return r;
-}
-#endif // !STBI_NO_STDIO
-
-STBIDEF int stbi_info_from_memory(stbi_uc const *buffer, int len, int *x, int *y, int *comp)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__info_main(&s,x,y,comp);
-}
-
-STBIDEF int stbi_info_from_callbacks(stbi_io_callbacks const *c, void *user, int *x, int *y, int *comp)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
-   return stbi__info_main(&s,x,y,comp);
-}
-
-STBIDEF int stbi_is_16_bit_from_memory(stbi_uc const *buffer, int len)
-{
-   stbi__context s;
-   stbi__start_mem(&s,buffer,len);
-   return stbi__is_16_main(&s);
-}
-
-STBIDEF int stbi_is_16_bit_from_callbacks(stbi_io_callbacks const *c, void *user)
-{
-   stbi__context s;
-   stbi__start_callbacks(&s, (stbi_io_callbacks *) c, user);
-   return stbi__is_16_main(&s);
-}
-
-#endif // STB_IMAGE_IMPLEMENTATION
-
-/*
-   revision history:
-      2.20  (2019-02-07) support utf8 filenames in Windows; fix warnings and platform ifdefs
-      2.19  (2018-02-11) fix warning
-      2.18  (2018-01-30) fix warnings
-      2.17  (2018-01-29) change sbti__shiftsigned to avoid clang -O2 bug
-                         1-bit BMP
-                         *_is_16_bit api
-                         avoid warnings
-      2.16  (2017-07-23) all functions have 16-bit variants;
-                         STBI_NO_STDIO works again;
-                         compilation fixes;
-                         fix rounding in unpremultiply;
-                         optimize vertical flip;
-                         disable raw_len validation;
-                         documentation fixes
-      2.15  (2017-03-18) fix png-1,2,4 bug; now all Imagenet JPGs decode;
-                         warning fixes; disable run-time SSE detection on gcc;
-                         uniform handling of optional "return" values;
-                         thread-safe initialization of zlib tables
-      2.14  (2017-03-03) remove deprecated STBI_JPEG_OLD; fixes for Imagenet JPGs
-      2.13  (2016-11-29) add 16-bit API, only supported for PNG right now
-      2.12  (2016-04-02) fix typo in 2.11 PSD fix that caused crashes
-      2.11  (2016-04-02) allocate large structures on the stack
-                         remove white matting for transparent PSD
-                         fix reported channel count for PNG & BMP
-                         re-enable SSE2 in non-gcc 64-bit
-                         support RGB-formatted JPEG
-                         read 16-bit PNGs (only as 8-bit)
-      2.10  (2016-01-22) avoid warning introduced in 2.09 by STBI_REALLOC_SIZED
-      2.09  (2016-01-16) allow comments in PNM files
-                         16-bit-per-pixel TGA (not bit-per-component)
-                         info() for TGA could break due to .hdr handling
-                         info() for BMP to shares code instead of sloppy parse
-                         can use STBI_REALLOC_SIZED if allocator doesn't support realloc
-                         code cleanup
-      2.08  (2015-09-13) fix to 2.07 cleanup, reading RGB PSD as RGBA
-      2.07  (2015-09-13) fix compiler warnings
-                         partial animated GIF support
-                         limited 16-bpc PSD support
-                         #ifdef unused functions
-                         bug with < 92 byte PIC,PNM,HDR,TGA
-      2.06  (2015-04-19) fix bug where PSD returns wrong '*comp' value
-      2.05  (2015-04-19) fix bug in progressive JPEG handling, fix warning
-      2.04  (2015-04-15) try to re-enable SIMD on MinGW 64-bit
-      2.03  (2015-04-12) extra corruption checking (mmozeiko)
-                         stbi_set_flip_vertically_on_load (nguillemot)
-                         fix NEON support; fix mingw support
-      2.02  (2015-01-19) fix incorrect assert, fix warning
-      2.01  (2015-01-17) fix various warnings; suppress SIMD on gcc 32-bit without -msse2
-      2.00b (2014-12-25) fix STBI_MALLOC in progressive JPEG
-      2.00  (2014-12-25) optimize JPG, including x86 SSE2 & NEON SIMD (ryg)
-                         progressive JPEG (stb)
-                         PGM/PPM support (Ken Miller)
-                         STBI_MALLOC,STBI_REALLOC,STBI_FREE
-                         GIF bugfix -- seemingly never worked
-                         STBI_NO_*, STBI_ONLY_*
-      1.48  (2014-12-14) fix incorrectly-named assert()
-      1.47  (2014-12-14) 1/2/4-bit PNG support, both direct and paletted (Omar Cornut & stb)
-                         optimize PNG (ryg)
-                         fix bug in interlaced PNG with user-specified channel count (stb)
-      1.46  (2014-08-26)
-              fix broken tRNS chunk (colorkey-style transparency) in non-paletted PNG
-      1.45  (2014-08-16)
-              fix MSVC-ARM internal compiler error by wrapping malloc
-      1.44  (2014-08-07)
-              various warning fixes from Ronny Chevalier
-      1.43  (2014-07-15)
-              fix MSVC-only compiler problem in code changed in 1.42
-      1.42  (2014-07-09)
-              don't define _CRT_SECURE_NO_WARNINGS (affects user code)
-              fixes to stbi__cleanup_jpeg path
-              added STBI_ASSERT to avoid requiring assert.h
-      1.41  (2014-06-25)
-              fix search&replace from 1.36 that messed up comments/error messages
-      1.40  (2014-06-22)
-              fix gcc struct-initialization warning
-      1.39  (2014-06-15)
-              fix to TGA optimization when req_comp != number of components in TGA;
-              fix to GIF loading because BMP wasn't rewinding (whoops, no GIFs in my test suite)
-              add support for BMP version 5 (more ignored fields)
-      1.38  (2014-06-06)
-              suppress MSVC warnings on integer casts truncating values
-              fix accidental rename of 'skip' field of I/O
-      1.37  (2014-06-04)
-              remove duplicate typedef
-      1.36  (2014-06-03)
-              convert to header file single-file library
-              if de-iphone isn't set, load iphone images color-swapped instead of returning NULL
-      1.35  (2014-05-27)
-              various warnings
-              fix broken STBI_SIMD path
-              fix bug where stbi_load_from_file no longer left file pointer in correct place
-              fix broken non-easy path for 32-bit BMP (possibly never used)
-              TGA optimization by Arseny Kapoulkine
-      1.34  (unknown)
-              use STBI_NOTUSED in stbi__resample_row_generic(), fix one more leak in tga failure case
-      1.33  (2011-07-14)
-              make stbi_is_hdr work in STBI_NO_HDR (as specified), minor compiler-friendly improvements
-      1.32  (2011-07-13)
-              support for "info" function for all supported filetypes (SpartanJ)
-      1.31  (2011-06-20)
-              a few more leak fixes, bug in PNG handling (SpartanJ)
-      1.30  (2011-06-11)
-              added ability to load files via callbacks to accomidate custom input streams (Ben Wenger)
-              removed deprecated format-specific test/load functions
-              removed support for installable file formats (stbi_loader) -- would have been broken for IO callbacks anyway
-              error cases in bmp and tga give messages and don't leak (Raymond Barbiero, grisha)
-              fix inefficiency in decoding 32-bit BMP (David Woo)
-      1.29  (2010-08-16)
-              various warning fixes from Aurelien Pocheville
-      1.28  (2010-08-01)
-              fix bug in GIF palette transparency (SpartanJ)
-      1.27  (2010-08-01)
-              cast-to-stbi_uc to fix warnings
-      1.26  (2010-07-24)
-              fix bug in file buffering for PNG reported by SpartanJ
-      1.25  (2010-07-17)
-              refix trans_data warning (Won Chun)
-      1.24  (2010-07-12)
-              perf improvements reading from files on platforms with lock-heavy fgetc()
-              minor perf improvements for jpeg
-              deprecated type-specific functions so we'll get feedback if they're needed
-              attempt to fix trans_data warning (Won Chun)
-      1.23    fixed bug in iPhone support
-      1.22  (2010-07-10)
-              removed image *writing* support
-              stbi_info support from Jetro Lauha
-              GIF support from Jean-Marc Lienher
-              iPhone PNG-extensions from James Brown
-              warning-fixes from Nicolas Schulz and Janez Zemva (i.stbi__err. Janez (U+017D)emva)
-      1.21    fix use of 'stbi_uc' in header (reported by jon blow)
-      1.20    added support for Softimage PIC, by Tom Seddon
-      1.19    bug in interlaced PNG corruption check (found by ryg)
-      1.18  (2008-08-02)
-              fix a threading bug (local mutable static)
-      1.17    support interlaced PNG
-      1.16    major bugfix - stbi__convert_format converted one too many pixels
-      1.15    initialize some fields for thread safety
-      1.14    fix threadsafe conversion bug
-              header-file-only version (#define STBI_HEADER_FILE_ONLY before including)
-      1.13    threadsafe
-      1.12    const qualifiers in the API
-      1.11    Support installable IDCT, colorspace conversion routines
-      1.10    Fixes for 64-bit (don't use "unsigned long")
-              optimized upsampling by Fabian "ryg" Giesen
-      1.09    Fix format-conversion for PSD code (bad global variables!)
-      1.08    Thatcher Ulrich's PSD code integrated by Nicolas Schulz
-      1.07    attempt to fix C++ warning/errors again
-      1.06    attempt to fix C++ warning/errors again
-      1.05    fix TGA loading to return correct *comp and use good luminance calc
-      1.04    default float alpha is 1, not 255; use 'void *' for stbi_image_free
-      1.03    bugfixes to STBI_NO_STDIO, STBI_NO_HDR
-      1.02    support for (subset of) HDR files, float interface for preferred access to them
-      1.01    fix bug: possible bug in handling right-side up bmps... not sure
-              fix bug: the stbi__bmp_load() and stbi__tga_load() functions didn't work at all
-      1.00    interface to zlib that skips zlib header
-      0.99    correct handling of alpha in palette
-      0.98    TGA loader by lonesock; dynamically add loaders (untested)
-      0.97    jpeg errors on too large a file; also catch another malloc failure
-      0.96    fix detection of invalid v value - particleman@mollyrocket forum
-      0.95    during header scan, seek to markers in case of padding
-      0.94    STBI_NO_STDIO to disable stdio usage; rename all #defines the same
-      0.93    handle jpegtran output; verbose errors
-      0.92    read 4,8,16,24,32-bit BMP files of several formats
-      0.91    output 24-bit Windows 3.0 BMP files
-      0.90    fix a few more warnings; bump version number to approach 1.0
-      0.61    bugfixes due to Marc LeBlanc, Christopher Lloyd
-      0.60    fix compiling as c++
-      0.59    fix warnings: merge Dave Moore's -Wall fixes
-      0.58    fix bug: zlib uncompressed mode len/nlen was wrong endian
-      0.57    fix bug: jpg last huffman symbol before marker was >9 bits but less than 16 available
-      0.56    fix bug: zlib uncompressed mode len vs. nlen
-      0.55    fix bug: restart_interval not initialized to 0
-      0.54    allow NULL for 'int *comp'
-      0.53    fix bug in png 3->4; speedup png decoding
-      0.52    png handles req_comp=3,4 directly; minor cleanup; jpeg comments
-      0.51    obey req_comp requests, 1-component jpegs return as 1-component,
-              on 'test' only check type, not whether we support this variant
-      0.50  (2006-11-19)
-              first released version
-*/
-
-
-/*
-------------------------------------------------------------------------------
-This software is available under 2 licenses -- choose whichever you prefer.
-------------------------------------------------------------------------------
-ALTERNATIVE A - MIT License
-Copyright (c) 2017 Sean Barrett
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-------------------------------------------------------------------------------
-ALTERNATIVE B - Public Domain (www.unlicense.org)
-This is free and unencumbered software released into the public domain.
-Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
-software, either in source code form or as a compiled binary, for any purpose,
-commercial or non-commercial, and by any means.
-In jurisdictions that recognize copyright laws, the author or authors of this
-software dedicate any and all copyright interest in the software to the public
-domain. We make this dedication for the benefit of the public at large and to
-the detriment of our heirs and successors. We intend this dedication to be an
-overt act of relinquishment in perpetuity of all present and future rights to
-this software under copyright law.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-------------------------------------------------------------------------------
-*/
diff --git a/stb_truetype.h b/stb_truetype.h
deleted file mode 100644
index bbf2284..0000000
--- a/stb_truetype.h
+++ /dev/null
@@ -1,5077 +0,0 @@
-// stb_truetype.h - v1.26 - public domain
-// authored from 2009-2021 by Sean Barrett / RAD Game Tools
-//
-// =======================================================================
-//
-//    NO SECURITY GUARANTEE -- DO NOT USE THIS ON UNTRUSTED FONT FILES
-//
-// This library does no range checking of the offsets found in the file,
-// meaning an attacker can use it to read arbitrary memory.
-//
-// =======================================================================
-//
-//   This library processes TrueType files:
-//        parse files
-//        extract glyph metrics
-//        extract glyph shapes
-//        render glyphs to one-channel bitmaps with antialiasing (box filter)
-//        render glyphs to one-channel SDF bitmaps (signed-distance field/function)
-//
-//   Todo:
-//        non-MS cmaps
-//        crashproof on bad data
-//        hinting? (no longer patented)
-//        cleartype-style AA?
-//        optimize: use simple memory allocator for intermediates
-//        optimize: build edge-list directly from curves
-//        optimize: rasterize directly from curves?
-//
-// ADDITIONAL CONTRIBUTORS
-//
-//   Mikko Mononen: compound shape support, more cmap formats
-//   Tor Andersson: kerning, subpixel rendering
-//   Dougall Johnson: OpenType / Type 2 font handling
-//   Daniel Ribeiro Maciel: basic GPOS-based kerning
-//
-//   Misc other:
-//       Ryan Gordon
-//       Simon Glass
-//       github:IntellectualKitty
-//       Imanol Celaya
-//       Daniel Ribeiro Maciel
-//
-//   Bug/warning reports/fixes:
-//       "Zer" on mollyrocket       Fabian "ryg" Giesen   github:NiLuJe
-//       Cass Everitt               Martins Mozeiko       github:aloucks
-//       stoiko (Haemimont Games)   Cap Petschulat        github:oyvindjam
-//       Brian Hook                 Omar Cornut           github:vassvik
-//       Walter van Niftrik         Ryan Griege
-//       David Gow                  Peter LaValle
-//       David Given                Sergey Popov
-//       Ivan-Assen Ivanov          Giumo X. Clanjor
-//       Anthony Pesch              Higor Euripedes
-//       Johan Duparc               Thomas Fields
-//       Hou Qiming                 Derek Vinyard
-//       Rob Loach                  Cort Stratton
-//       Kenney Phillis Jr.         Brian Costabile
-//       Ken Voskuil (kaesve)
-//
-// VERSION HISTORY
-//
-//   1.26 (2021-08-28) fix broken rasterizer
-//   1.25 (2021-07-11) many fixes
-//   1.24 (2020-02-05) fix warning
-//   1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS)
-//   1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined
-//   1.21 (2019-02-25) fix warning
-//   1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics()
-//   1.19 (2018-02-11) GPOS kerning, STBTT_fmod
-//   1.18 (2018-01-29) add missing function
-//   1.17 (2017-07-23) make more arguments const; doc fix
-//   1.16 (2017-07-12) SDF support
-//   1.15 (2017-03-03) make more arguments const
-//   1.14 (2017-01-16) num-fonts-in-TTC function
-//   1.13 (2017-01-02) support OpenType fonts, certain Apple fonts
-//   1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual
-//   1.11 (2016-04-02) fix unused-variable warning
-//   1.10 (2016-04-02) user-defined fabs(); rare memory leak; remove duplicate typedef
-//   1.09 (2016-01-16) warning fix; avoid crash on outofmem; use allocation userdata properly
-//   1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
-//   1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
-//                     variant PackFontRanges to pack and render in separate phases;
-//                     fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
-//                     fixed an assert() bug in the new rasterizer
-//                     replace assert() with STBTT_assert() in new rasterizer
-//
-//   Full history can be found at the end of this file.
-//
-// LICENSE
-//
-//   See end of file for license information.
-//
-// USAGE
-//
-//   Include this file in whatever places need to refer to it. In ONE C/C++
-//   file, write:
-//      #define STB_TRUETYPE_IMPLEMENTATION
-//   before the #include of this file. This expands out the actual
-//   implementation into that C/C++ file.
-//
-//   To make the implementation private to the file that generates the implementation,
-//      #define STBTT_STATIC
-//
-//   Simple 3D API (don't ship this, but it's fine for tools and quick start)
-//           stbtt_BakeFontBitmap()               -- bake a font to a bitmap for use as texture
-//           stbtt_GetBakedQuad()                 -- compute quad to draw for a given char
-//
-//   Improved 3D API (more shippable):
-//           #include "stb_rect_pack.h"           -- optional, but you really want it
-//           stbtt_PackBegin()
-//           stbtt_PackSetOversampling()          -- for improved quality on small fonts
-//           stbtt_PackFontRanges()               -- pack and renders
-//           stbtt_PackEnd()
-//           stbtt_GetPackedQuad()
-//
-//   "Load" a font file from a memory buffer (you have to keep the buffer loaded)
-//           stbtt_InitFont()
-//           stbtt_GetFontOffsetForIndex()        -- indexing for TTC font collections
-//           stbtt_GetNumberOfFonts()             -- number of fonts for TTC font collections
-//
-//   Render a unicode codepoint to a bitmap
-//           stbtt_GetCodepointBitmap()           -- allocates and returns a bitmap
-//           stbtt_MakeCodepointBitmap()          -- renders into bitmap you provide
-//           stbtt_GetCodepointBitmapBox()        -- how big the bitmap must be
-//
-//   Character advance/positioning
-//           stbtt_GetCodepointHMetrics()
-//           stbtt_GetFontVMetrics()
-//           stbtt_GetFontVMetricsOS2()
-//           stbtt_GetCodepointKernAdvance()
-//
-//   Starting with version 1.06, the rasterizer was replaced with a new,
-//   faster and generally-more-precise rasterizer. The new rasterizer more
-//   accurately measures pixel coverage for anti-aliasing, except in the case
-//   where multiple shapes overlap, in which case it overestimates the AA pixel
-//   coverage. Thus, anti-aliasing of intersecting shapes may look wrong. If
-//   this turns out to be a problem, you can re-enable the old rasterizer with
-//        #define STBTT_RASTERIZER_VERSION 1
-//   which will incur about a 15% speed hit.
-//
-// ADDITIONAL DOCUMENTATION
-//
-//   Immediately after this block comment are a series of sample programs.
-//
-//   After the sample programs is the "header file" section. This section
-//   includes documentation for each API function.
-//
-//   Some important concepts to understand to use this library:
-//
-//      Codepoint
-//         Characters are defined by unicode codepoints, e.g. 65 is
-//         uppercase A, 231 is lowercase c with a cedilla, 0x7e30 is
-//         the hiragana for "ma".
-//
-//      Glyph
-//         A visual character shape (every codepoint is rendered as
-//         some glyph)
-//
-//      Glyph index
-//         A font-specific integer ID representing a glyph
-//
-//      Baseline
-//         Glyph shapes are defined relative to a baseline, which is the
-//         bottom of uppercase characters. Characters extend both above
-//         and below the baseline.
-//
-//      Current Point
-//         As you draw text to the screen, you keep track of a "current point"
-//         which is the origin of each character. The current point's vertical
-//         position is the baseline. Even "baked fonts" use this model.
-//
-//      Vertical Font Metrics
-//         The vertical qualities of the font, used to vertically position
-//         and space the characters. See docs for stbtt_GetFontVMetrics.
-//
-//      Font Size in Pixels or Points
-//         The preferred interface for specifying font sizes in stb_truetype
-//         is to specify how tall the font's vertical extent should be in pixels.
-//         If that sounds good enough, skip the next paragraph.
-//
-//         Most font APIs instead use "points", which are a common typographic
-//         measurement for describing font size, defined as 72 points per inch.
-//         stb_truetype provides a point API for compatibility. However, true
-//         "per inch" conventions don't make much sense on computer displays
-//         since different monitors have different number of pixels per
-//         inch. For example, Windows traditionally uses a convention that
-//         there are 96 pixels per inch, thus making 'inch' measurements have
-//         nothing to do with inches, and thus effectively defining a point to
-//         be 1.333 pixels. Additionally, the TrueType font data provides
-//         an explicit scale factor to scale a given font's glyphs to points,
-//         but the author has observed that this scale factor is often wrong
-//         for non-commercial fonts, thus making fonts scaled in points
-//         according to the TrueType spec incoherently sized in practice.
-//
-// DETAILED USAGE:
-//
-//  Scale:
-//    Select how high you want the font to be, in points or pixels.
-//    Call ScaleForPixelHeight or ScaleForMappingEmToPixels to compute
-//    a scale factor SF that will be used by all other functions.
-//
-//  Baseline:
-//    You need to select a y-coordinate that is the baseline of where
-//    your text will appear. Call GetFontBoundingBox to get the baseline-relative
-//    bounding box for all characters. SF*-y0 will be the distance in pixels
-//    that the worst-case character could extend above the baseline, so if
-//    you want the top edge of characters to appear at the top of the
-//    screen where y=0, then you would set the baseline to SF*-y0.
-//
-//  Current point:
-//    Set the current point where the first character will appear. The
-//    first character could extend left of the current point; this is font
-//    dependent. You can either choose a current point that is the leftmost
-//    point and hope, or add some padding, or check the bounding box or
-//    left-side-bearing of the first character to be displayed and set
-//    the current point based on that.
-//
-//  Displaying a character:
-//    Compute the bounding box of the character. It will contain signed values
-//    relative to <current_point, baseline>. I.e. if it returns x0,y0,x1,y1,
-//    then the character should be displayed in the rectangle from
-//    <current_point+SF*x0, baseline+SF*y0> to <current_point+SF*x1,baseline+SF*y1).
-//
-//  Advancing for the next character:
-//    Call GlyphHMetrics, and compute 'current_point += SF * advance'.
-//
-//
-// ADVANCED USAGE
-//
-//   Quality:
-//
-//    - Use the functions with Subpixel at the end to allow your characters
-//      to have subpixel positioning. Since the font is anti-aliased, not
-//      hinted, this is very import for quality. (This is not possible with
-//      baked fonts.)
-//
-//    - Kerning is now supported, and if you're supporting subpixel rendering
-//      then kerning is worth using to give your text a polished look.
-//
-//   Performance:
-//
-//    - Convert Unicode codepoints to glyph indexes and operate on the glyphs;
-//      if you don't do this, stb_truetype is forced to do the conversion on
-//      every call.
-//
-//    - There are a lot of memory allocations. We should modify it to take
-//      a temp buffer and allocate from the temp buffer (without freeing),
-//      should help performance a lot.
-//
-// NOTES
-//
-//   The system uses the raw data found in the .ttf file without changing it
-//   and without building auxiliary data structures. This is a bit inefficient
-//   on little-endian systems (the data is big-endian), but assuming you're
-//   caching the bitmaps or glyph shapes this shouldn't be a big deal.
-//
-//   It appears to be very hard to programmatically determine what font a
-//   given file is in a general way. I provide an API for this, but I don't
-//   recommend it.
-//
-//
-// PERFORMANCE MEASUREMENTS FOR 1.06:
-//
-//                      32-bit     64-bit
-//   Previous release:  8.83 s     7.68 s
-//   Pool allocations:  7.72 s     6.34 s
-//   Inline sort     :  6.54 s     5.65 s
-//   New rasterizer  :  5.63 s     5.00 s
-
-//////////////////////////////////////////////////////////////////////////////
-//////////////////////////////////////////////////////////////////////////////
-////
-////  SAMPLE PROGRAMS
-////
-//
-//  Incomplete text-in-3d-api example, which draws quads properly aligned to be lossless.
-//  See "tests/truetype_demo_win32.c" for a complete version.
-#if 0
-#define STB_TRUETYPE_IMPLEMENTATION  // force following include to generate implementation
-#include "stb_truetype.h"
-
-unsigned char ttf_buffer[1<<20];
-unsigned char temp_bitmap[512*512];
-
-stbtt_bakedchar cdata[96]; // ASCII 32..126 is 95 glyphs
-GLuint ftex;
-
-void my_stbtt_initfont(void)
-{
-   fread(ttf_buffer, 1, 1<<20, fopen("c:/windows/fonts/times.ttf", "rb"));
-   stbtt_BakeFontBitmap(ttf_buffer,0, 32.0, temp_bitmap,512,512, 32,96, cdata); // no guarantee this fits!
-   // can free ttf_buffer at this point
-   glGenTextures(1, &ftex);
-   glBindTexture(GL_TEXTURE_2D, ftex);
-   glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, 512,512, 0, GL_ALPHA, GL_UNSIGNED_BYTE, temp_bitmap);
-   // can free temp_bitmap at this point
-   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
-}
-
-void my_stbtt_print(float x, float y, char *text)
-{
-   // assume orthographic projection with units = screen pixels, origin at top left
-   glEnable(GL_BLEND);
-   glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-   glEnable(GL_TEXTURE_2D);
-   glBindTexture(GL_TEXTURE_2D, ftex);
-   glBegin(GL_QUADS);
-   while (*text) {
-      if (*text >= 32 && *text < 128) {
-         stbtt_aligned_quad q;
-         stbtt_GetBakedQuad(cdata, 512,512, *text-32, &x,&y,&q,1);//1=opengl & d3d10+,0=d3d9
-         glTexCoord2f(q.s0,q.t0); glVertex2f(q.x0,q.y0);
-         glTexCoord2f(q.s1,q.t0); glVertex2f(q.x1,q.y0);
-         glTexCoord2f(q.s1,q.t1); glVertex2f(q.x1,q.y1);
-         glTexCoord2f(q.s0,q.t1); glVertex2f(q.x0,q.y1);
-      }
-      ++text;
-   }
-   glEnd();
-}
-#endif
-//
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-// Complete program (this compiles): get a single bitmap, print as ASCII art
-//
-#if 0
-#include <stdio.h>
-#define STB_TRUETYPE_IMPLEMENTATION  // force following include to generate implementation
-#include "stb_truetype.h"
-
-char ttf_buffer[1<<25];
-
-int main(int argc, char **argv)
-{
-   stbtt_fontinfo font;
-   unsigned char *bitmap;
-   int w,h,i,j,c = (argc > 1 ? atoi(argv[1]) : 'a'), s = (argc > 2 ? atoi(argv[2]) : 20);
-
-   fread(ttf_buffer, 1, 1<<25, fopen(argc > 3 ? argv[3] : "c:/windows/fonts/arialbd.ttf", "rb"));
-
-   stbtt_InitFont(&font, ttf_buffer, stbtt_GetFontOffsetForIndex(ttf_buffer,0));
-   bitmap = stbtt_GetCodepointBitmap(&font, 0,stbtt_ScaleForPixelHeight(&font, s), c, &w, &h, 0,0);
-
-   for (j=0; j < h; ++j) {
-      for (i=0; i < w; ++i)
-         putchar(" .:ioVM@"[bitmap[j*w+i]>>5]);
-      putchar('\n');
-   }
-   return 0;
-}
-#endif
-//
-// Output:
-//
-//     .ii.
-//    @@@@@@.
-//   V@Mio@@o
-//   :i.  V@V
-//     :oM@@M
-//   :@@@MM@M
-//   @@o  o@M
-//  :@@.  M@M
-//   @@@o@@@@
-//   :M@@V:@@.
-//
-//////////////////////////////////////////////////////////////////////////////
-//
-// Complete program: print "Hello World!" banner, with bugs
-//
-#if 0
-char buffer[24<<20];
-unsigned char screen[20][79];
-
-int main(int arg, char **argv)
-{
-   stbtt_fontinfo font;
-   int i,j,ascent,baseline,ch=0;
-   float scale, xpos=2; // leave a little padding in case the character extends left
-   char *text = "Heljo World!"; // intentionally misspelled to show 'lj' brokenness
-
-   fread(buffer, 1, 1000000, fopen("c:/windows/fonts/arialbd.ttf", "rb"));
-   stbtt_InitFont(&font, buffer, 0);
-
-   scale = stbtt_ScaleForPixelHeight(&font, 15);
-   stbtt_GetFontVMetrics(&font, &ascent,0,0);
-   baseline = (int) (ascent*scale);
-
-   while (text[ch]) {
-      int advance,lsb,x0,y0,x1,y1;
-      float x_shift = xpos - (float) floor(xpos);
-      stbtt_GetCodepointHMetrics(&font, text[ch], &advance, &lsb);
-      stbtt_GetCodepointBitmapBoxSubpixel(&font, text[ch], scale,scale,x_shift,0, &x0,&y0,&x1,&y1);
-      stbtt_MakeCodepointBitmapSubpixel(&font, &screen[baseline + y0][(int) xpos + x0], x1-x0,y1-y0, 79, scale,scale,x_shift,0, text[ch]);
-      // note that this stomps the old data, so where character boxes overlap (e.g. 'lj') it's wrong
-      // because this API is really for baking character bitmaps into textures. if you want to render
-      // a sequence of characters, you really need to render each bitmap to a temp buffer, then
-      // "alpha blend" that into the working buffer
-      xpos += (advance * scale);
-      if (text[ch+1])
-         xpos += scale*stbtt_GetCodepointKernAdvance(&font, text[ch],text[ch+1]);
-      ++ch;
-   }
-
-   for (j=0; j < 20; ++j) {
-      for (i=0; i < 78; ++i)
-         putchar(" .:ioVM@"[screen[j][i]>>5]);
-      putchar('\n');
-   }
-
-   return 0;
-}
-#endif
-
-
-//////////////////////////////////////////////////////////////////////////////
-//////////////////////////////////////////////////////////////////////////////
-////
-////   INTEGRATION WITH YOUR CODEBASE
-////
-////   The following sections allow you to supply alternate definitions
-////   of C library functions used by stb_truetype, e.g. if you don't
-////   link with the C runtime library.
-
-#ifdef STB_TRUETYPE_IMPLEMENTATION
-   // #define your own (u)stbtt_int8/16/32 before including to override this
-   #ifndef stbtt_uint8
-   typedef unsigned char   stbtt_uint8;
-   typedef signed   char   stbtt_int8;
-   typedef unsigned short  stbtt_uint16;
-   typedef signed   short  stbtt_int16;
-   typedef unsigned int    stbtt_uint32;
-   typedef signed   int    stbtt_int32;
-   #endif
-
-   typedef char stbtt__check_size32[sizeof(stbtt_int32)==4 ? 1 : -1];
-   typedef char stbtt__check_size16[sizeof(stbtt_int16)==2 ? 1 : -1];
-
-   // e.g. #define your own STBTT_ifloor/STBTT_iceil() to avoid math.h
-   #ifndef STBTT_ifloor
-   #include <math.h>
-   #define STBTT_ifloor(x)   ((int) floor(x))
-   #define STBTT_iceil(x)    ((int) ceil(x))
-   #endif
-
-   #ifndef STBTT_sqrt
-   #include <math.h>
-   #define STBTT_sqrt(x)      sqrt(x)
-   #define STBTT_pow(x,y)     pow(x,y)
-   #endif
-
-   #ifndef STBTT_fmod
-   #include <math.h>
-   #define STBTT_fmod(x,y)    fmod(x,y)
-   #endif
-
-   #ifndef STBTT_cos
-   #include <math.h>
-   #define STBTT_cos(x)       cos(x)
-   #define STBTT_acos(x)      acos(x)
-   #endif
-
-   #ifndef STBTT_fabs
-   #include <math.h>
-   #define STBTT_fabs(x)      fabs(x)
-   #endif
-
-   // #define your own functions "STBTT_malloc" / "STBTT_free" to avoid malloc.h
-   #ifndef STBTT_malloc
-   #include <stdlib.h>
-   #define STBTT_malloc(x,u)  ((void)(u),malloc(x))
-   #define STBTT_free(x,u)    ((void)(u),free(x))
-   #endif
-
-   #ifndef STBTT_assert
-   #include <assert.h>
-   #define STBTT_assert(x)    assert(x)
-   #endif
-
-   #ifndef STBTT_strlen
-   #include <string.h>
-   #define STBTT_strlen(x)    strlen(x)
-   #endif
-
-   #ifndef STBTT_memcpy
-   #include <string.h>
-   #define STBTT_memcpy       memcpy
-   #define STBTT_memset       memset
-   #endif
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-////
-////   INTERFACE
-////
-////
-
-#ifndef __STB_INCLUDE_STB_TRUETYPE_H__
-#define __STB_INCLUDE_STB_TRUETYPE_H__
-
-#ifdef STBTT_STATIC
-#define STBTT_DEF static
-#else
-#define STBTT_DEF extern
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-// private structure
-typedef struct
-{
-   unsigned char *data;
-   int cursor;
-   int size;
-} stbtt__buf;
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// TEXTURE BAKING API
-//
-// If you use this API, you only have to call two functions ever.
-//
-
-typedef struct
-{
-   unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
-   float xoff,yoff,xadvance;
-} stbtt_bakedchar;
-
-STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
-                                float pixel_height,                     // height of font in pixels
-                                unsigned char *pixels, int pw, int ph,  // bitmap to be filled in
-                                int first_char, int num_chars,          // characters to bake
-                                stbtt_bakedchar *chardata);             // you allocate this, it's num_chars long
-// if return is positive, the first unused row of the bitmap
-// if return is negative, returns the negative of the number of characters that fit
-// if return is 0, no characters fit and no rows were used
-// This uses a very crappy packing.
-
-typedef struct
-{
-   float x0,y0,s0,t0; // top-left
-   float x1,y1,s1,t1; // bottom-right
-} stbtt_aligned_quad;
-
-STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph,  // same data as above
-                               int char_index,             // character to display
-                               float *xpos, float *ypos,   // pointers to current position in screen pixel space
-                               stbtt_aligned_quad *q,      // output: quad to draw
-                               int opengl_fillrule);       // true if opengl fill rule; false if DX9 or earlier
-// Call GetBakedQuad with char_index = 'character - first_char', and it
-// creates the quad you need to draw and advances the current position.
-//
-// The coordinate system used assumes y increases downwards.
-//
-// Characters will extend both above and below the current position;
-// see discussion of "BASELINE" above.
-//
-// It's inefficient; you might want to c&p it and optimize it.
-
-STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap);
-// Query the font vertical metrics without having to create a font first.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// NEW TEXTURE BAKING API
-//
-// This provides options for packing multiple fonts into one atlas, not
-// perfectly but better than nothing.
-
-typedef struct
-{
-   unsigned short x0,y0,x1,y1; // coordinates of bbox in bitmap
-   float xoff,yoff,xadvance;
-   float xoff2,yoff2;
-} stbtt_packedchar;
-
-typedef struct stbtt_pack_context stbtt_pack_context;
-typedef struct stbtt_fontinfo stbtt_fontinfo;
-#ifndef STB_RECT_PACK_VERSION
-typedef struct stbrp_rect stbrp_rect;
-#endif
-
-STBTT_DEF int  stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int width, int height, int stride_in_bytes, int padding, void *alloc_context);
-// Initializes a packing context stored in the passed-in stbtt_pack_context.
-// Future calls using this context will pack characters into the bitmap passed
-// in here: a 1-channel bitmap that is width * height. stride_in_bytes is
-// the distance from one row to the next (or 0 to mean they are packed tightly
-// together). "padding" is the amount of padding to leave between each
-// character (normally you want '1' for bitmaps you'll use as textures with
-// bilinear filtering).
-//
-// Returns 0 on failure, 1 on success.
-
-STBTT_DEF void stbtt_PackEnd  (stbtt_pack_context *spc);
-// Cleans up the packing context and frees all memory.
-
-#define STBTT_POINT_SIZE(x)   (-(x))
-
-STBTT_DEF int  stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size,
-                                int first_unicode_char_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range);
-// Creates character bitmaps from the font_index'th font found in fontdata (use
-// font_index=0 if you don't know what that is). It creates num_chars_in_range
-// bitmaps for characters with unicode values starting at first_unicode_char_in_range
-// and increasing. Data for how to render them is stored in chardata_for_range;
-// pass these to stbtt_GetPackedQuad to get back renderable quads.
-//
-// font_size is the full height of the character from ascender to descender,
-// as computed by stbtt_ScaleForPixelHeight. To use a point size as computed
-// by stbtt_ScaleForMappingEmToPixels, wrap the point size in STBTT_POINT_SIZE()
-// and pass that result as 'font_size':
-//       ...,                  20 , ... // font max minus min y is 20 pixels tall
-//       ..., STBTT_POINT_SIZE(20), ... // 'M' is 20 pixels tall
-
-typedef struct
-{
-   float font_size;
-   int first_unicode_codepoint_in_range;  // if non-zero, then the chars are continuous, and this is the first codepoint
-   int *array_of_unicode_codepoints;       // if non-zero, then this is an array of unicode codepoints
-   int num_chars;
-   stbtt_packedchar *chardata_for_range; // output
-   unsigned char h_oversample, v_oversample; // don't set these, they're used internally
-} stbtt_pack_range;
-
-STBTT_DEF int  stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges);
-// Creates character bitmaps from multiple ranges of characters stored in
-// ranges. This will usually create a better-packed bitmap than multiple
-// calls to stbtt_PackFontRange. Note that you can call this multiple
-// times within a single PackBegin/PackEnd.
-
-STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample);
-// Oversampling a font increases the quality by allowing higher-quality subpixel
-// positioning, and is especially valuable at smaller text sizes.
-//
-// This function sets the amount of oversampling for all following calls to
-// stbtt_PackFontRange(s) or stbtt_PackFontRangesGatherRects for a given
-// pack context. The default (no oversampling) is achieved by h_oversample=1
-// and v_oversample=1. The total number of pixels required is
-// h_oversample*v_oversample larger than the default; for example, 2x2
-// oversampling requires 4x the storage of 1x1. For best results, render
-// oversampled textures with bilinear filtering. Look at the readme in
-// stb/tests/oversample for information about oversampled fonts
-//
-// To use with PackFontRangesGather etc., you must set it before calls
-// call to PackFontRangesGatherRects.
-
-STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip);
-// If skip != 0, this tells stb_truetype to skip any codepoints for which
-// there is no corresponding glyph. If skip=0, which is the default, then
-// codepoints without a glyph recived the font's "missing character" glyph,
-// typically an empty box by convention.
-
-STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph,  // same data as above
-                               int char_index,             // character to display
-                               float *xpos, float *ypos,   // pointers to current position in screen pixel space
-                               stbtt_aligned_quad *q,      // output: quad to draw
-                               int align_to_integer);
-
-STBTT_DEF int  stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
-STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects);
-STBTT_DEF int  stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects);
-// Calling these functions in sequence is roughly equivalent to calling
-// stbtt_PackFontRanges(). If you more control over the packing of multiple
-// fonts, or if you want to pack custom data into a font texture, take a look
-// at the source to of stbtt_PackFontRanges() and create a custom version
-// using these functions, e.g. call GatherRects multiple times,
-// building up a single array of rects, then call PackRects once,
-// then call RenderIntoRects repeatedly. This may result in a
-// better packing than calling PackFontRanges multiple times
-// (or it may not).
-
-// this is an opaque structure that you shouldn't mess with which holds
-// all the context needed from PackBegin to PackEnd.
-struct stbtt_pack_context {
-   void *user_allocator_context;
-   void *pack_info;
-   int   width;
-   int   height;
-   int   stride_in_bytes;
-   int   padding;
-   int   skip_missing;
-   unsigned int   h_oversample, v_oversample;
-   unsigned char *pixels;
-   void  *nodes;
-};
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// FONT LOADING
-//
-//
-
-STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data);
-// This function will determine the number of fonts in a font file.  TrueType
-// collection (.ttc) files may contain multiple fonts, while TrueType font
-// (.ttf) files only contain one font. The number of fonts can be used for
-// indexing with the previous function where the index is between zero and one
-// less than the total fonts. If an error occurs, -1 is returned.
-
-STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index);
-// Each .ttf/.ttc file may have more than one font. Each font has a sequential
-// index number starting from 0. Call this function to get the font offset for
-// a given index; it returns -1 if the index is out of range. A regular .ttf
-// file will only define one font and it always be at offset 0, so it will
-// return '0' for index 0, and -1 for all other indices.
-
-// The following structure is defined publicly so you can declare one on
-// the stack or as a global or etc, but you should treat it as opaque.
-struct stbtt_fontinfo
-{
-   void           * userdata;
-   unsigned char  * data;              // pointer to .ttf file
-   int              fontstart;         // offset of start of font
-
-   int numGlyphs;                     // number of glyphs, needed for range checking
-
-   int loca,head,glyf,hhea,hmtx,kern,gpos,svg; // table locations as offset from start of .ttf
-   int index_map;                     // a cmap mapping for our chosen character encoding
-   int indexToLocFormat;              // format needed to map from glyph index to glyph
-
-   stbtt__buf cff;                    // cff font data
-   stbtt__buf charstrings;            // the charstring index
-   stbtt__buf gsubrs;                 // global charstring subroutines index
-   stbtt__buf subrs;                  // private charstring subroutines index
-   stbtt__buf fontdicts;              // array of font dicts
-   stbtt__buf fdselect;               // map from glyph to fontdict
-};
-
-STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset);
-// Given an offset into the file that defines a font, this function builds
-// the necessary cached info for the rest of the system. You must allocate
-// the stbtt_fontinfo yourself, and stbtt_InitFont will fill it out. You don't
-// need to do anything special to free it, because the contents are pure
-// value data with no additional data structures. Returns 0 on failure.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CHARACTER TO GLYPH-INDEX CONVERSIOn
-
-STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint);
-// If you're going to perform multiple operations on the same character
-// and you want a speed-up, call this function with the character you're
-// going to process, then use glyph-based functions instead of the
-// codepoint-based functions.
-// Returns 0 if the character codepoint is not defined in the font.
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// CHARACTER PROPERTIES
-//
-
-STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float pixels);
-// computes a scale factor to produce a font whose "height" is 'pixels' tall.
-// Height is measured as the distance from the highest ascender to the lowest
-// descender; in other words, it's equivalent to calling stbtt_GetFontVMetrics
-// and computing:
-//       scale = pixels / (ascent - descent)
-// so if you prefer to measure height by the ascent only, use a similar calculation.
-
-STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels);
-// computes a scale factor to produce a font whose EM size is mapped to
-// 'pixels' tall. This is probably what traditional APIs compute, but
-// I'm not positive.
-
-STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap);
-// ascent is the coordinate above the baseline the font extends; descent
-// is the coordinate below the baseline the font extends (i.e. it is typically negative)
-// lineGap is the spacing between one row's descent and the next row's ascent...
-// so you should advance the vertical position by "*ascent - *descent + *lineGap"
-//   these are expressed in unscaled coordinates, so you must multiply by
-//   the scale factor for a given size
-
-STBTT_DEF int  stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap);
-// analogous to GetFontVMetrics, but returns the "typographic" values from the OS/2
-// table (specific to MS/Windows TTF files).
-//
-// Returns 1 on success (table present), 0 on failure.
-
-STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1);
-// the bounding box around all possible characters
-
-STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing);
-// leftSideBearing is the offset from the current horizontal position to the left edge of the character
-// advanceWidth is the offset from the current horizontal position to the next horizontal position
-//   these are expressed in unscaled coordinates
-
-STBTT_DEF int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2);
-// an additional amount to add to the 'advance' value between ch1 and ch2
-
-STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1);
-// Gets the bounding box of the visible part of the glyph, in unscaled coordinates
-
-STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing);
-STBTT_DEF int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2);
-STBTT_DEF int  stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
-// as above, but takes one or more glyph indices for greater efficiency
-
-typedef struct stbtt_kerningentry
-{
-   int glyph1; // use stbtt_FindGlyphIndex
-   int glyph2;
-   int advance;
-} stbtt_kerningentry;
-
-STBTT_DEF int  stbtt_GetKerningTableLength(const stbtt_fontinfo *info);
-STBTT_DEF int  stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length);
-// Retrieves a complete list of all of the kerning pairs provided by the font
-// stbtt_GetKerningTable never writes more than table_length entries and returns how many entries it did write.
-// The table will be sorted by (a.glyph1 == b.glyph1)?(a.glyph2 < b.glyph2):(a.glyph1 < b.glyph1)
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// GLYPH SHAPES (you probably don't need these, but they have to go before
-// the bitmaps for C declaration-order reasons)
-//
-
-#ifndef STBTT_vmove // you can predefine these to use different values (but why?)
-   enum {
-      STBTT_vmove=1,
-      STBTT_vline,
-      STBTT_vcurve,
-      STBTT_vcubic
-   };
-#endif
-
-#ifndef stbtt_vertex // you can predefine this to use different values
-                   // (we share this with other code at RAD)
-   #define stbtt_vertex_type short // can't use stbtt_int16 because that's not visible in the header file
-   typedef struct
-   {
-      stbtt_vertex_type x,y,cx,cy,cx1,cy1;
-      unsigned char type,padding;
-   } stbtt_vertex;
-#endif
-
-STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index);
-// returns non-zero if nothing is drawn for this glyph
-
-STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices);
-STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **vertices);
-// returns # of vertices and fills *vertices with the pointer to them
-//   these are expressed in "unscaled" coordinates
-//
-// The shape is a series of contours. Each one starts with
-// a STBTT_moveto, then consists of a series of mixed
-// STBTT_lineto and STBTT_curveto segments. A lineto
-// draws a line from previous endpoint to its x,y; a curveto
-// draws a quadratic bezier from previous endpoint to
-// its x,y, using cx,cy as the bezier control point.
-
-STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *vertices);
-// frees the data allocated above
-
-STBTT_DEF unsigned char *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl);
-STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg);
-STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg);
-// fills svg with the character's SVG data.
-// returns data size or 0 if SVG not found.
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// BITMAP RENDERING
-//
-
-STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata);
-// frees the bitmap allocated below
-
-STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
-// allocates a large-enough single-channel 8bpp bitmap and renders the
-// specified character/glyph at the specified scale into it, with
-// antialiasing. 0 is no coverage (transparent), 255 is fully covered (opaque).
-// *width & *height are filled out with the width & height of the bitmap,
-// which is stored left-to-right, top-to-bottom.
-//
-// xoff/yoff are the offset it pixel space from the glyph origin to the top-left of the bitmap
-
-STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff);
-// the same as stbtt_GetCodepoitnBitmap, but you can specify a subpixel
-// shift for the character
-
-STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint);
-// the same as stbtt_GetCodepointBitmap, but you pass in storage for the bitmap
-// in the form of 'output', with row spacing of 'out_stride' bytes. the bitmap
-// is clipped to out_w/out_h bytes. Call stbtt_GetCodepointBitmapBox to get the
-// width and height and positioning info for it first.
-
-STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint);
-// same as stbtt_MakeCodepointBitmap, but you can specify a subpixel
-// shift for the character
-
-STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint);
-// same as stbtt_MakeCodepointBitmapSubpixel, but prefiltering
-// is performed (see stbtt_PackSetOversampling)
-
-STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
-// get the bbox of the bitmap centered around the glyph origin; so the
-// bitmap width is ix1-ix0, height is iy1-iy0, and location to place
-// the bitmap top left is (leftSideBearing*scale,iy0).
-// (Note that the bitmap uses y-increases-down, but the shape uses
-// y-increases-up, so CodepointBitmapBox and CodepointBox are inverted.)
-
-STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
-// same as stbtt_GetCodepointBitmapBox, but you can specify a subpixel
-// shift for the character
-
-// the following functions are equivalent to the above functions, but operate
-// on glyph indices instead of Unicode codepoints (for efficiency)
-STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff);
-STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph);
-STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph);
-STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int glyph);
-STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1);
-STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1);
-
-
-// @TODO: don't expose this structure
-typedef struct
-{
-   int w,h,stride;
-   unsigned char *pixels;
-} stbtt__bitmap;
-
-// rasterize a shape with quadratic beziers into a bitmap
-STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result,        // 1-channel bitmap to draw into
-                               float flatness_in_pixels,     // allowable error of curve in pixels
-                               stbtt_vertex *vertices,       // array of vertices defining shape
-                               int num_verts,                // number of vertices in above array
-                               float scale_x, float scale_y, // scale applied to input vertices
-                               float shift_x, float shift_y, // translation applied to input vertices
-                               int x_off, int y_off,         // another translation applied to input
-                               int invert,                   // if non-zero, vertically flip shape
-                               void *userdata);              // context for to STBTT_MALLOC
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Signed Distance Function (or Field) rendering
-
-STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata);
-// frees the SDF bitmap allocated below
-
-STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff);
-STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff);
-// These functions compute a discretized SDF field for a single character, suitable for storing
-// in a single-channel texture, sampling with bilinear filtering, and testing against
-// larger than some threshold to produce scalable fonts.
-//        info              --  the font
-//        scale             --  controls the size of the resulting SDF bitmap, same as it would be creating a regular bitmap
-//        glyph/codepoint   --  the character to generate the SDF for
-//        padding           --  extra "pixels" around the character which are filled with the distance to the character (not 0),
-//                                 which allows effects like bit outlines
-//        onedge_value      --  value 0-255 to test the SDF against to reconstruct the character (i.e. the isocontour of the character)
-//        pixel_dist_scale  --  what value the SDF should increase by when moving one SDF "pixel" away from the edge (on the 0..255 scale)
-//                                 if positive, > onedge_value is inside; if negative, < onedge_value is inside
-//        width,height      --  output height & width of the SDF bitmap (including padding)
-//        xoff,yoff         --  output origin of the character
-//        return value      --  a 2D array of bytes 0..255, width*height in size
-//
-// pixel_dist_scale & onedge_value are a scale & bias that allows you to make
-// optimal use of the limited 0..255 for your application, trading off precision
-// and special effects. SDF values outside the range 0..255 are clamped to 0..255.
-//
-// Example:
-//      scale = stbtt_ScaleForPixelHeight(22)
-//      padding = 5
-//      onedge_value = 180
-//      pixel_dist_scale = 180/5.0 = 36.0
-//
-//      This will create an SDF bitmap in which the character is about 22 pixels
-//      high but the whole bitmap is about 22+5+5=32 pixels high. To produce a filled
-//      shape, sample the SDF at each pixel and fill the pixel if the SDF value
-//      is greater than or equal to 180/255. (You'll actually want to antialias,
-//      which is beyond the scope of this example.) Additionally, you can compute
-//      offset outlines (e.g. to stroke the character border inside & outside,
-//      or only outside). For example, to fill outside the character up to 3 SDF
-//      pixels, you would compare against (180-36.0*3)/255 = 72/255. The above
-//      choice of variables maps a range from 5 pixels outside the shape to
-//      2 pixels inside the shape to 0..255; this is intended primarily for apply
-//      outside effects only (the interior range is needed to allow proper
-//      antialiasing of the font at *smaller* sizes)
-//
-// The function computes the SDF analytically at each SDF pixel, not by e.g.
-// building a higher-res bitmap and approximating it. In theory the quality
-// should be as high as possible for an SDF of this size & representation, but
-// unclear if this is true in practice (perhaps building a higher-res bitmap
-// and computing from that can allow drop-out prevention).
-//
-// The algorithm has not been optimized at all, so expect it to be slow
-// if computing lots of characters or very large sizes.
-
-
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// Finding the right font...
-//
-// You should really just solve this offline, keep your own tables
-// of what font is what, and don't try to get it out of the .ttf file.
-// That's because getting it out of the .ttf file is really hard, because
-// the names in the file can appear in many possible encodings, in many
-// possible languages, and e.g. if you need a case-insensitive comparison,
-// the details of that depend on the encoding & language in a complex way
-// (actually underspecified in truetype, but also gigantic).
-//
-// But you can use the provided functions in two possible ways:
-//     stbtt_FindMatchingFont() will use *case-sensitive* comparisons on
-//             unicode-encoded names to try to find the font you want;
-//             you can run this before calling stbtt_InitFont()
-//
-//     stbtt_GetFontNameString() lets you get any of the various strings
-//             from the file yourself and do your own comparisons on them.
-//             You have to have called stbtt_InitFont() first.
-
-
-STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags);
-// returns the offset (not index) of the font that matches, or -1 if none
-//   if you use STBTT_MACSTYLE_DONTCARE, use a font name like "Arial Bold".
-//   if you use any other flag, use a font name like "Arial"; this checks
-//     the 'macStyle' header field; i don't know if fonts set this consistently
-#define STBTT_MACSTYLE_DONTCARE     0
-#define STBTT_MACSTYLE_BOLD         1
-#define STBTT_MACSTYLE_ITALIC       2
-#define STBTT_MACSTYLE_UNDERSCORE   4
-#define STBTT_MACSTYLE_NONE         8   // <= not same as 0, this makes us check the bitfield is 0
-
-STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2);
-// returns 1/0 whether the first string interpreted as utf8 is identical to
-// the second string interpreted as big-endian utf16... useful for strings from next func
-
-STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID);
-// returns the string (which may be big-endian double byte, e.g. for unicode)
-// and puts the length in bytes in *length.
-//
-// some of the values for the IDs are below; for more see the truetype spec:
-//     http://developer.apple.com/textfonts/TTRefMan/RM06/Chap6name.html
-//     http://www.microsoft.com/typography/otspec/name.htm
-
-enum { // platformID
-   STBTT_PLATFORM_ID_UNICODE   =0,
-   STBTT_PLATFORM_ID_MAC       =1,
-   STBTT_PLATFORM_ID_ISO       =2,
-   STBTT_PLATFORM_ID_MICROSOFT =3
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_UNICODE
-   STBTT_UNICODE_EID_UNICODE_1_0    =0,
-   STBTT_UNICODE_EID_UNICODE_1_1    =1,
-   STBTT_UNICODE_EID_ISO_10646      =2,
-   STBTT_UNICODE_EID_UNICODE_2_0_BMP=3,
-   STBTT_UNICODE_EID_UNICODE_2_0_FULL=4
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_MICROSOFT
-   STBTT_MS_EID_SYMBOL        =0,
-   STBTT_MS_EID_UNICODE_BMP   =1,
-   STBTT_MS_EID_SHIFTJIS      =2,
-   STBTT_MS_EID_UNICODE_FULL  =10
-};
-
-enum { // encodingID for STBTT_PLATFORM_ID_MAC; same as Script Manager codes
-   STBTT_MAC_EID_ROMAN        =0,   STBTT_MAC_EID_ARABIC       =4,
-   STBTT_MAC_EID_JAPANESE     =1,   STBTT_MAC_EID_HEBREW       =5,
-   STBTT_MAC_EID_CHINESE_TRAD =2,   STBTT_MAC_EID_GREEK        =6,
-   STBTT_MAC_EID_KOREAN       =3,   STBTT_MAC_EID_RUSSIAN      =7
-};
-
-enum { // languageID for STBTT_PLATFORM_ID_MICROSOFT; same as LCID...
-       // problematic because there are e.g. 16 english LCIDs and 16 arabic LCIDs
-   STBTT_MS_LANG_ENGLISH     =0x0409,   STBTT_MS_LANG_ITALIAN     =0x0410,
-   STBTT_MS_LANG_CHINESE     =0x0804,   STBTT_MS_LANG_JAPANESE    =0x0411,
-   STBTT_MS_LANG_DUTCH       =0x0413,   STBTT_MS_LANG_KOREAN      =0x0412,
-   STBTT_MS_LANG_FRENCH      =0x040c,   STBTT_MS_LANG_RUSSIAN     =0x0419,
-   STBTT_MS_LANG_GERMAN      =0x0407,   STBTT_MS_LANG_SPANISH     =0x0409,
-   STBTT_MS_LANG_HEBREW      =0x040d,   STBTT_MS_LANG_SWEDISH     =0x041D
-};
-
-enum { // languageID for STBTT_PLATFORM_ID_MAC
-   STBTT_MAC_LANG_ENGLISH      =0 ,   STBTT_MAC_LANG_JAPANESE     =11,
-   STBTT_MAC_LANG_ARABIC       =12,   STBTT_MAC_LANG_KOREAN       =23,
-   STBTT_MAC_LANG_DUTCH        =4 ,   STBTT_MAC_LANG_RUSSIAN      =32,
-   STBTT_MAC_LANG_FRENCH       =1 ,   STBTT_MAC_LANG_SPANISH      =6 ,
-   STBTT_MAC_LANG_GERMAN       =2 ,   STBTT_MAC_LANG_SWEDISH      =5 ,
-   STBTT_MAC_LANG_HEBREW       =10,   STBTT_MAC_LANG_CHINESE_SIMPLIFIED =33,
-   STBTT_MAC_LANG_ITALIAN      =3 ,   STBTT_MAC_LANG_CHINESE_TRAD =19
-};
-
-#ifdef __cplusplus
-}
-#endif
-
-#endif // __STB_INCLUDE_STB_TRUETYPE_H__
-
-///////////////////////////////////////////////////////////////////////////////
-///////////////////////////////////////////////////////////////////////////////
-////
-////   IMPLEMENTATION
-////
-////
-
-#ifdef STB_TRUETYPE_IMPLEMENTATION
-
-#ifndef STBTT_MAX_OVERSAMPLE
-#define STBTT_MAX_OVERSAMPLE   8
-#endif
-
-#if STBTT_MAX_OVERSAMPLE > 255
-#error "STBTT_MAX_OVERSAMPLE cannot be > 255"
-#endif
-
-typedef int stbtt__test_oversample_pow2[(STBTT_MAX_OVERSAMPLE & (STBTT_MAX_OVERSAMPLE-1)) == 0 ? 1 : -1];
-
-#ifndef STBTT_RASTERIZER_VERSION
-#define STBTT_RASTERIZER_VERSION 2
-#endif
-
-#ifdef _MSC_VER
-#define STBTT__NOTUSED(v)  (void)(v)
-#else
-#define STBTT__NOTUSED(v)  (void)sizeof(v)
-#endif
-
-//////////////////////////////////////////////////////////////////////////
-//
-// stbtt__buf helpers to parse data from file
-//
-
-static stbtt_uint8 stbtt__buf_get8(stbtt__buf *b)
-{
-   if (b->cursor >= b->size)
-      return 0;
-   return b->data[b->cursor++];
-}
-
-static stbtt_uint8 stbtt__buf_peek8(stbtt__buf *b)
-{
-   if (b->cursor >= b->size)
-      return 0;
-   return b->data[b->cursor];
-}
-
-static void stbtt__buf_seek(stbtt__buf *b, int o)
-{
-   STBTT_assert(!(o > b->size || o < 0));
-   b->cursor = (o > b->size || o < 0) ? b->size : o;
-}
-
-static void stbtt__buf_skip(stbtt__buf *b, int o)
-{
-   stbtt__buf_seek(b, b->cursor + o);
-}
-
-static stbtt_uint32 stbtt__buf_get(stbtt__buf *b, int n)
-{
-   stbtt_uint32 v = 0;
-   int i;
-   STBTT_assert(n >= 1 && n <= 4);
-   for (i = 0; i < n; i++)
-      v = (v << 8) | stbtt__buf_get8(b);
-   return v;
-}
-
-static stbtt__buf stbtt__new_buf(const void *p, size_t size)
-{
-   stbtt__buf r;
-   STBTT_assert(size < 0x40000000);
-   r.data = (stbtt_uint8*) p;
-   r.size = (int) size;
-   r.cursor = 0;
-   return r;
-}
-
-#define stbtt__buf_get16(b)  stbtt__buf_get((b), 2)
-#define stbtt__buf_get32(b)  stbtt__buf_get((b), 4)
-
-static stbtt__buf stbtt__buf_range(const stbtt__buf *b, int o, int s)
-{
-   stbtt__buf r = stbtt__new_buf(NULL, 0);
-   if (o < 0 || s < 0 || o > b->size || s > b->size - o) return r;
-   r.data = b->data + o;
-   r.size = s;
-   return r;
-}
-
-static stbtt__buf stbtt__cff_get_index(stbtt__buf *b)
-{
-   int count, start, offsize;
-   start = b->cursor;
-   count = stbtt__buf_get16(b);
-   if (count) {
-      offsize = stbtt__buf_get8(b);
-      STBTT_assert(offsize >= 1 && offsize <= 4);
-      stbtt__buf_skip(b, offsize * count);
-      stbtt__buf_skip(b, stbtt__buf_get(b, offsize) - 1);
-   }
-   return stbtt__buf_range(b, start, b->cursor - start);
-}
-
-static stbtt_uint32 stbtt__cff_int(stbtt__buf *b)
-{
-   int b0 = stbtt__buf_get8(b);
-   if (b0 >= 32 && b0 <= 246)       return b0 - 139;
-   else if (b0 >= 247 && b0 <= 250) return (b0 - 247)*256 + stbtt__buf_get8(b) + 108;
-   else if (b0 >= 251 && b0 <= 254) return -(b0 - 251)*256 - stbtt__buf_get8(b) - 108;
-   else if (b0 == 28)               return stbtt__buf_get16(b);
-   else if (b0 == 29)               return stbtt__buf_get32(b);
-   STBTT_assert(0);
-   return 0;
-}
-
-static void stbtt__cff_skip_operand(stbtt__buf *b) {
-   int v, b0 = stbtt__buf_peek8(b);
-   STBTT_assert(b0 >= 28);
-   if (b0 == 30) {
-      stbtt__buf_skip(b, 1);
-      while (b->cursor < b->size) {
-         v = stbtt__buf_get8(b);
-         if ((v & 0xF) == 0xF || (v >> 4) == 0xF)
-            break;
-      }
-   } else {
-      stbtt__cff_int(b);
-   }
-}
-
-static stbtt__buf stbtt__dict_get(stbtt__buf *b, int key)
-{
-   stbtt__buf_seek(b, 0);
-   while (b->cursor < b->size) {
-      int start = b->cursor, end, op;
-      while (stbtt__buf_peek8(b) >= 28)
-         stbtt__cff_skip_operand(b);
-      end = b->cursor;
-      op = stbtt__buf_get8(b);
-      if (op == 12)  op = stbtt__buf_get8(b) | 0x100;
-      if (op == key) return stbtt__buf_range(b, start, end-start);
-   }
-   return stbtt__buf_range(b, 0, 0);
-}
-
-static void stbtt__dict_get_ints(stbtt__buf *b, int key, int outcount, stbtt_uint32 *out)
-{
-   int i;
-   stbtt__buf operands = stbtt__dict_get(b, key);
-   for (i = 0; i < outcount && operands.cursor < operands.size; i++)
-      out[i] = stbtt__cff_int(&operands);
-}
-
-static int stbtt__cff_index_count(stbtt__buf *b)
-{
-   stbtt__buf_seek(b, 0);
-   return stbtt__buf_get16(b);
-}
-
-static stbtt__buf stbtt__cff_index_get(stbtt__buf b, int i)
-{
-   int count, offsize, start, end;
-   stbtt__buf_seek(&b, 0);
-   count = stbtt__buf_get16(&b);
-   offsize = stbtt__buf_get8(&b);
-   STBTT_assert(i >= 0 && i < count);
-   STBTT_assert(offsize >= 1 && offsize <= 4);
-   stbtt__buf_skip(&b, i*offsize);
-   start = stbtt__buf_get(&b, offsize);
-   end = stbtt__buf_get(&b, offsize);
-   return stbtt__buf_range(&b, 2+(count+1)*offsize+start, end - start);
-}
-
-//////////////////////////////////////////////////////////////////////////
-//
-// accessors to parse data from file
-//
-
-// on platforms that don't allow misaligned reads, if we want to allow
-// truetype fonts that aren't padded to alignment, define ALLOW_UNALIGNED_TRUETYPE
-
-#define ttBYTE(p)     (* (stbtt_uint8 *) (p))
-#define ttCHAR(p)     (* (stbtt_int8 *) (p))
-#define ttFixed(p)    ttLONG(p)
-
-static stbtt_uint16 ttUSHORT(stbtt_uint8 *p) { return p[0]*256 + p[1]; }
-static stbtt_int16 ttSHORT(stbtt_uint8 *p)   { return p[0]*256 + p[1]; }
-static stbtt_uint32 ttULONG(stbtt_uint8 *p)  { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
-static stbtt_int32 ttLONG(stbtt_uint8 *p)    { return (p[0]<<24) + (p[1]<<16) + (p[2]<<8) + p[3]; }
-
-#define stbtt_tag4(p,c0,c1,c2,c3) ((p)[0] == (c0) && (p)[1] == (c1) && (p)[2] == (c2) && (p)[3] == (c3))
-#define stbtt_tag(p,str)           stbtt_tag4(p,str[0],str[1],str[2],str[3])
-
-static int stbtt__isfont(stbtt_uint8 *font)
-{
-   // check the version number
-   if (stbtt_tag4(font, '1',0,0,0))  return 1; // TrueType 1
-   if (stbtt_tag(font, "typ1"))   return 1; // TrueType with type 1 font -- we don't support this!
-   if (stbtt_tag(font, "OTTO"))   return 1; // OpenType with CFF
-   if (stbtt_tag4(font, 0,1,0,0)) return 1; // OpenType 1.0
-   if (stbtt_tag(font, "true"))   return 1; // Apple specification for TrueType fonts
-   return 0;
-}
-
-// @OPTIMIZE: binary search
-static stbtt_uint32 stbtt__find_table(stbtt_uint8 *data, stbtt_uint32 fontstart, const char *tag)
-{
-   stbtt_int32 num_tables = ttUSHORT(data+fontstart+4);
-   stbtt_uint32 tabledir = fontstart + 12;
-   stbtt_int32 i;
-   for (i=0; i < num_tables; ++i) {
-      stbtt_uint32 loc = tabledir + 16*i;
-      if (stbtt_tag(data+loc+0, tag))
-         return ttULONG(data+loc+8);
-   }
-   return 0;
-}
-
-static int stbtt_GetFontOffsetForIndex_internal(unsigned char *font_collection, int index)
-{
-   // if it's just a font, there's only one valid index
-   if (stbtt__isfont(font_collection))
-      return index == 0 ? 0 : -1;
-
-   // check if it's a TTC
-   if (stbtt_tag(font_collection, "ttcf")) {
-      // version 1?
-      if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
-         stbtt_int32 n = ttLONG(font_collection+8);
-         if (index >= n)
-            return -1;
-         return ttULONG(font_collection+12+index*4);
-      }
-   }
-   return -1;
-}
-
-static int stbtt_GetNumberOfFonts_internal(unsigned char *font_collection)
-{
-   // if it's just a font, there's only one valid font
-   if (stbtt__isfont(font_collection))
-      return 1;
-
-   // check if it's a TTC
-   if (stbtt_tag(font_collection, "ttcf")) {
-      // version 1?
-      if (ttULONG(font_collection+4) == 0x00010000 || ttULONG(font_collection+4) == 0x00020000) {
-         return ttLONG(font_collection+8);
-      }
-   }
-   return 0;
-}
-
-static stbtt__buf stbtt__get_subrs(stbtt__buf cff, stbtt__buf fontdict)
-{
-   stbtt_uint32 subrsoff = 0, private_loc[2] = { 0, 0 };
-   stbtt__buf pdict;
-   stbtt__dict_get_ints(&fontdict, 18, 2, private_loc);
-   if (!private_loc[1] || !private_loc[0]) return stbtt__new_buf(NULL, 0);
-   pdict = stbtt__buf_range(&cff, private_loc[1], private_loc[0]);
-   stbtt__dict_get_ints(&pdict, 19, 1, &subrsoff);
-   if (!subrsoff) return stbtt__new_buf(NULL, 0);
-   stbtt__buf_seek(&cff, private_loc[1]+subrsoff);
-   return stbtt__cff_get_index(&cff);
-}
-
-// since most people won't use this, find this table the first time it's needed
-static int stbtt__get_svg(stbtt_fontinfo *info)
-{
-   stbtt_uint32 t;
-   if (info->svg < 0) {
-      t = stbtt__find_table(info->data, info->fontstart, "SVG ");
-      if (t) {
-         stbtt_uint32 offset = ttULONG(info->data + t + 2);
-         info->svg = t + offset;
-      } else {
-         info->svg = 0;
-      }
-   }
-   return info->svg;
-}
-
-static int stbtt_InitFont_internal(stbtt_fontinfo *info, unsigned char *data, int fontstart)
-{
-   stbtt_uint32 cmap, t;
-   stbtt_int32 i,numTables;
-
-   info->data = data;
-   info->fontstart = fontstart;
-   info->cff = stbtt__new_buf(NULL, 0);
-
-   cmap = stbtt__find_table(data, fontstart, "cmap");       // required
-   info->loca = stbtt__find_table(data, fontstart, "loca"); // required
-   info->head = stbtt__find_table(data, fontstart, "head"); // required
-   info->glyf = stbtt__find_table(data, fontstart, "glyf"); // required
-   info->hhea = stbtt__find_table(data, fontstart, "hhea"); // required
-   info->hmtx = stbtt__find_table(data, fontstart, "hmtx"); // required
-   info->kern = stbtt__find_table(data, fontstart, "kern"); // not required
-   info->gpos = stbtt__find_table(data, fontstart, "GPOS"); // not required
-
-   if (!cmap || !info->head || !info->hhea || !info->hmtx)
-      return 0;
-   if (info->glyf) {
-      // required for truetype
-      if (!info->loca) return 0;
-   } else {
-      // initialization for CFF / Type2 fonts (OTF)
-      stbtt__buf b, topdict, topdictidx;
-      stbtt_uint32 cstype = 2, charstrings = 0, fdarrayoff = 0, fdselectoff = 0;
-      stbtt_uint32 cff;
-
-      cff = stbtt__find_table(data, fontstart, "CFF ");
-      if (!cff) return 0;
-
-      info->fontdicts = stbtt__new_buf(NULL, 0);
-      info->fdselect = stbtt__new_buf(NULL, 0);
-
-      // @TODO this should use size from table (not 512MB)
-      info->cff = stbtt__new_buf(data+cff, 512*1024*1024);
-      b = info->cff;
-
-      // read the header
-      stbtt__buf_skip(&b, 2);
-      stbtt__buf_seek(&b, stbtt__buf_get8(&b)); // hdrsize
-
-      // @TODO the name INDEX could list multiple fonts,
-      // but we just use the first one.
-      stbtt__cff_get_index(&b);  // name INDEX
-      topdictidx = stbtt__cff_get_index(&b);
-      topdict = stbtt__cff_index_get(topdictidx, 0);
-      stbtt__cff_get_index(&b);  // string INDEX
-      info->gsubrs = stbtt__cff_get_index(&b);
-
-      stbtt__dict_get_ints(&topdict, 17, 1, &charstrings);
-      stbtt__dict_get_ints(&topdict, 0x100 | 6, 1, &cstype);
-      stbtt__dict_get_ints(&topdict, 0x100 | 36, 1, &fdarrayoff);
-      stbtt__dict_get_ints(&topdict, 0x100 | 37, 1, &fdselectoff);
-      info->subrs = stbtt__get_subrs(b, topdict);
-
-      // we only support Type 2 charstrings
-      if (cstype != 2) return 0;
-      if (charstrings == 0) return 0;
-
-      if (fdarrayoff) {
-         // looks like a CID font
-         if (!fdselectoff) return 0;
-         stbtt__buf_seek(&b, fdarrayoff);
-         info->fontdicts = stbtt__cff_get_index(&b);
-         info->fdselect = stbtt__buf_range(&b, fdselectoff, b.size-fdselectoff);
-      }
-
-      stbtt__buf_seek(&b, charstrings);
-      info->charstrings = stbtt__cff_get_index(&b);
-   }
-
-   t = stbtt__find_table(data, fontstart, "maxp");
-   if (t)
-      info->numGlyphs = ttUSHORT(data+t+4);
-   else
-      info->numGlyphs = 0xffff;
-
-   info->svg = -1;
-
-   // find a cmap encoding table we understand *now* to avoid searching
-   // later. (todo: could make this installable)
-   // the same regardless of glyph.
-   numTables = ttUSHORT(data + cmap + 2);
-   info->index_map = 0;
-   for (i=0; i < numTables; ++i) {
-      stbtt_uint32 encoding_record = cmap + 4 + 8 * i;
-      // find an encoding we understand:
-      switch(ttUSHORT(data+encoding_record)) {
-         case STBTT_PLATFORM_ID_MICROSOFT:
-            switch (ttUSHORT(data+encoding_record+2)) {
-               case STBTT_MS_EID_UNICODE_BMP:
-               case STBTT_MS_EID_UNICODE_FULL:
-                  // MS/Unicode
-                  info->index_map = cmap + ttULONG(data+encoding_record+4);
-                  break;
-            }
-            break;
-        case STBTT_PLATFORM_ID_UNICODE:
-            // Mac/iOS has these
-            // all the encodingIDs are unicode, so we don't bother to check it
-            info->index_map = cmap + ttULONG(data+encoding_record+4);
-            break;
-      }
-   }
-   if (info->index_map == 0)
-      return 0;
-
-   info->indexToLocFormat = ttUSHORT(data+info->head + 50);
-   return 1;
-}
-
-STBTT_DEF int stbtt_FindGlyphIndex(const stbtt_fontinfo *info, int unicode_codepoint)
-{
-   stbtt_uint8 *data = info->data;
-   stbtt_uint32 index_map = info->index_map;
-
-   stbtt_uint16 format = ttUSHORT(data + index_map + 0);
-   if (format == 0) { // apple byte encoding
-      stbtt_int32 bytes = ttUSHORT(data + index_map + 2);
-      if (unicode_codepoint < bytes-6)
-         return ttBYTE(data + index_map + 6 + unicode_codepoint);
-      return 0;
-   } else if (format == 6) {
-      stbtt_uint32 first = ttUSHORT(data + index_map + 6);
-      stbtt_uint32 count = ttUSHORT(data + index_map + 8);
-      if ((stbtt_uint32) unicode_codepoint >= first && (stbtt_uint32) unicode_codepoint < first+count)
-         return ttUSHORT(data + index_map + 10 + (unicode_codepoint - first)*2);
-      return 0;
-   } else if (format == 2) {
-      STBTT_assert(0); // @TODO: high-byte mapping for japanese/chinese/korean
-      return 0;
-   } else if (format == 4) { // standard mapping for windows fonts: binary search collection of ranges
-      stbtt_uint16 segcount = ttUSHORT(data+index_map+6) >> 1;
-      stbtt_uint16 searchRange = ttUSHORT(data+index_map+8) >> 1;
-      stbtt_uint16 entrySelector = ttUSHORT(data+index_map+10);
-      stbtt_uint16 rangeShift = ttUSHORT(data+index_map+12) >> 1;
-
-      // do a binary search of the segments
-      stbtt_uint32 endCount = index_map + 14;
-      stbtt_uint32 search = endCount;
-
-      if (unicode_codepoint > 0xffff)
-         return 0;
-
-      // they lie from endCount .. endCount + segCount
-      // but searchRange is the nearest power of two, so...
-      if (unicode_codepoint >= ttUSHORT(data + search + rangeShift*2))
-         search += rangeShift*2;
-
-      // now decrement to bias correctly to find smallest
-      search -= 2;
-      while (entrySelector) {
-         stbtt_uint16 end;
-         searchRange >>= 1;
-         end = ttUSHORT(data + search + searchRange*2);
-         if (unicode_codepoint > end)
-            search += searchRange*2;
-         --entrySelector;
-      }
-      search += 2;
-
-      {
-         stbtt_uint16 offset, start, last;
-         stbtt_uint16 item = (stbtt_uint16) ((search - endCount) >> 1);
-
-         start = ttUSHORT(data + index_map + 14 + segcount*2 + 2 + 2*item);
-         last = ttUSHORT(data + endCount + 2*item);
-         if (unicode_codepoint < start || unicode_codepoint > last)
-            return 0;
-
-         offset = ttUSHORT(data + index_map + 14 + segcount*6 + 2 + 2*item);
-         if (offset == 0)
-            return (stbtt_uint16) (unicode_codepoint + ttSHORT(data + index_map + 14 + segcount*4 + 2 + 2*item));
-
-         return ttUSHORT(data + offset + (unicode_codepoint-start)*2 + index_map + 14 + segcount*6 + 2 + 2*item);
-      }
-   } else if (format == 12 || format == 13) {
-      stbtt_uint32 ngroups = ttULONG(data+index_map+12);
-      stbtt_int32 low,high;
-      low = 0; high = (stbtt_int32)ngroups;
-      // Binary search the right group.
-      while (low < high) {
-         stbtt_int32 mid = low + ((high-low) >> 1); // rounds down, so low <= mid < high
-         stbtt_uint32 start_char = ttULONG(data+index_map+16+mid*12);
-         stbtt_uint32 end_char = ttULONG(data+index_map+16+mid*12+4);
-         if ((stbtt_uint32) unicode_codepoint < start_char)
-            high = mid;
-         else if ((stbtt_uint32) unicode_codepoint > end_char)
-            low = mid+1;
-         else {
-            stbtt_uint32 start_glyph = ttULONG(data+index_map+16+mid*12+8);
-            if (format == 12)
-               return start_glyph + unicode_codepoint-start_char;
-            else // format == 13
-               return start_glyph;
-         }
-      }
-      return 0; // not found
-   }
-   // @TODO
-   STBTT_assert(0);
-   return 0;
-}
-
-STBTT_DEF int stbtt_GetCodepointShape(const stbtt_fontinfo *info, int unicode_codepoint, stbtt_vertex **vertices)
-{
-   return stbtt_GetGlyphShape(info, stbtt_FindGlyphIndex(info, unicode_codepoint), vertices);
-}
-
-static void stbtt_setvertex(stbtt_vertex *v, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy)
-{
-   v->type = type;
-   v->x = (stbtt_int16) x;
-   v->y = (stbtt_int16) y;
-   v->cx = (stbtt_int16) cx;
-   v->cy = (stbtt_int16) cy;
-}
-
-static int stbtt__GetGlyfOffset(const stbtt_fontinfo *info, int glyph_index)
-{
-   int g1,g2;
-
-   STBTT_assert(!info->cff.size);
-
-   if (glyph_index >= info->numGlyphs) return -1; // glyph index out of range
-   if (info->indexToLocFormat >= 2)    return -1; // unknown index->glyph map format
-
-   if (info->indexToLocFormat == 0) {
-      g1 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2) * 2;
-      g2 = info->glyf + ttUSHORT(info->data + info->loca + glyph_index * 2 + 2) * 2;
-   } else {
-      g1 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4);
-      g2 = info->glyf + ttULONG (info->data + info->loca + glyph_index * 4 + 4);
-   }
-
-   return g1==g2 ? -1 : g1; // if length is 0, return -1
-}
-
-static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1);
-
-STBTT_DEF int stbtt_GetGlyphBox(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
-{
-   if (info->cff.size) {
-      stbtt__GetGlyphInfoT2(info, glyph_index, x0, y0, x1, y1);
-   } else {
-      int g = stbtt__GetGlyfOffset(info, glyph_index);
-      if (g < 0) return 0;
-
-      if (x0) *x0 = ttSHORT(info->data + g + 2);
-      if (y0) *y0 = ttSHORT(info->data + g + 4);
-      if (x1) *x1 = ttSHORT(info->data + g + 6);
-      if (y1) *y1 = ttSHORT(info->data + g + 8);
-   }
-   return 1;
-}
-
-STBTT_DEF int stbtt_GetCodepointBox(const stbtt_fontinfo *info, int codepoint, int *x0, int *y0, int *x1, int *y1)
-{
-   return stbtt_GetGlyphBox(info, stbtt_FindGlyphIndex(info,codepoint), x0,y0,x1,y1);
-}
-
-STBTT_DEF int stbtt_IsGlyphEmpty(const stbtt_fontinfo *info, int glyph_index)
-{
-   stbtt_int16 numberOfContours;
-   int g;
-   if (info->cff.size)
-      return stbtt__GetGlyphInfoT2(info, glyph_index, NULL, NULL, NULL, NULL) == 0;
-   g = stbtt__GetGlyfOffset(info, glyph_index);
-   if (g < 0) return 1;
-   numberOfContours = ttSHORT(info->data + g);
-   return numberOfContours == 0;
-}
-
-static int stbtt__close_shape(stbtt_vertex *vertices, int num_vertices, int was_off, int start_off,
-    stbtt_int32 sx, stbtt_int32 sy, stbtt_int32 scx, stbtt_int32 scy, stbtt_int32 cx, stbtt_int32 cy)
-{
-   if (start_off) {
-      if (was_off)
-         stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+scx)>>1, (cy+scy)>>1, cx,cy);
-      stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, sx,sy,scx,scy);
-   } else {
-      if (was_off)
-         stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve,sx,sy,cx,cy);
-      else
-         stbtt_setvertex(&vertices[num_vertices++], STBTT_vline,sx,sy,0,0);
-   }
-   return num_vertices;
-}
-
-static int stbtt__GetGlyphShapeTT(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
-{
-   stbtt_int16 numberOfContours;
-   stbtt_uint8 *endPtsOfContours;
-   stbtt_uint8 *data = info->data;
-   stbtt_vertex *vertices=0;
-   int num_vertices=0;
-   int g = stbtt__GetGlyfOffset(info, glyph_index);
-
-   *pvertices = NULL;
-
-   if (g < 0) return 0;
-
-   numberOfContours = ttSHORT(data + g);
-
-   if (numberOfContours > 0) {
-      stbtt_uint8 flags=0,flagcount;
-      stbtt_int32 ins, i,j=0,m,n, next_move, was_off=0, off, start_off=0;
-      stbtt_int32 x,y,cx,cy,sx,sy, scx,scy;
-      stbtt_uint8 *points;
-      endPtsOfContours = (data + g + 10);
-      ins = ttUSHORT(data + g + 10 + numberOfContours * 2);
-      points = data + g + 10 + numberOfContours * 2 + 2 + ins;
-
-      n = 1+ttUSHORT(endPtsOfContours + numberOfContours*2-2);
-
-      m = n + 2*numberOfContours;  // a loose bound on how many vertices we might need
-      vertices = (stbtt_vertex *) STBTT_malloc(m * sizeof(vertices[0]), info->userdata);
-      if (vertices == 0)
-         return 0;
-
-      next_move = 0;
-      flagcount=0;
-
-      // in first pass, we load uninterpreted data into the allocated array
-      // above, shifted to the end of the array so we won't overwrite it when
-      // we create our final data starting from the front
-
-      off = m - n; // starting offset for uninterpreted data, regardless of how m ends up being calculated
-
-      // first load flags
-
-      for (i=0; i < n; ++i) {
-         if (flagcount == 0) {
-            flags = *points++;
-            if (flags & 8)
-               flagcount = *points++;
-         } else
-            --flagcount;
-         vertices[off+i].type = flags;
-      }
-
-      // now load x coordinates
-      x=0;
-      for (i=0; i < n; ++i) {
-         flags = vertices[off+i].type;
-         if (flags & 2) {
-            stbtt_int16 dx = *points++;
-            x += (flags & 16) ? dx : -dx; // ???
-         } else {
-            if (!(flags & 16)) {
-               x = x + (stbtt_int16) (points[0]*256 + points[1]);
-               points += 2;
-            }
-         }
-         vertices[off+i].x = (stbtt_int16) x;
-      }
-
-      // now load y coordinates
-      y=0;
-      for (i=0; i < n; ++i) {
-         flags = vertices[off+i].type;
-         if (flags & 4) {
-            stbtt_int16 dy = *points++;
-            y += (flags & 32) ? dy : -dy; // ???
-         } else {
-            if (!(flags & 32)) {
-               y = y + (stbtt_int16) (points[0]*256 + points[1]);
-               points += 2;
-            }
-         }
-         vertices[off+i].y = (stbtt_int16) y;
-      }
-
-      // now convert them to our format
-      num_vertices=0;
-      sx = sy = cx = cy = scx = scy = 0;
-      for (i=0; i < n; ++i) {
-         flags = vertices[off+i].type;
-         x     = (stbtt_int16) vertices[off+i].x;
-         y     = (stbtt_int16) vertices[off+i].y;
-
-         if (next_move == i) {
-            if (i != 0)
-               num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
-
-            // now start the new one
-            start_off = !(flags & 1);
-            if (start_off) {
-               // if we start off with an off-curve point, then when we need to find a point on the curve
-               // where we can start, and we need to save some state for when we wraparound.
-               scx = x;
-               scy = y;
-               if (!(vertices[off+i+1].type & 1)) {
-                  // next point is also a curve point, so interpolate an on-point curve
-                  sx = (x + (stbtt_int32) vertices[off+i+1].x) >> 1;
-                  sy = (y + (stbtt_int32) vertices[off+i+1].y) >> 1;
-               } else {
-                  // otherwise just use the next point as our start point
-                  sx = (stbtt_int32) vertices[off+i+1].x;
-                  sy = (stbtt_int32) vertices[off+i+1].y;
-                  ++i; // we're using point i+1 as the starting point, so skip it
-               }
-            } else {
-               sx = x;
-               sy = y;
-            }
-            stbtt_setvertex(&vertices[num_vertices++], STBTT_vmove,sx,sy,0,0);
-            was_off = 0;
-            next_move = 1 + ttUSHORT(endPtsOfContours+j*2);
-            ++j;
-         } else {
-            if (!(flags & 1)) { // if it's a curve
-               if (was_off) // two off-curve control points in a row means interpolate an on-curve midpoint
-                  stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, (cx+x)>>1, (cy+y)>>1, cx, cy);
-               cx = x;
-               cy = y;
-               was_off = 1;
-            } else {
-               if (was_off)
-                  stbtt_setvertex(&vertices[num_vertices++], STBTT_vcurve, x,y, cx, cy);
-               else
-                  stbtt_setvertex(&vertices[num_vertices++], STBTT_vline, x,y,0,0);
-               was_off = 0;
-            }
-         }
-      }
-      num_vertices = stbtt__close_shape(vertices, num_vertices, was_off, start_off, sx,sy,scx,scy,cx,cy);
-   } else if (numberOfContours < 0) {
-      // Compound shapes.
-      int more = 1;
-      stbtt_uint8 *comp = data + g + 10;
-      num_vertices = 0;
-      vertices = 0;
-      while (more) {
-         stbtt_uint16 flags, gidx;
-         int comp_num_verts = 0, i;
-         stbtt_vertex *comp_verts = 0, *tmp = 0;
-         float mtx[6] = {1,0,0,1,0,0}, m, n;
-
-         flags = ttSHORT(comp); comp+=2;
-         gidx = ttSHORT(comp); comp+=2;
-
-         if (flags & 2) { // XY values
-            if (flags & 1) { // shorts
-               mtx[4] = ttSHORT(comp); comp+=2;
-               mtx[5] = ttSHORT(comp); comp+=2;
-            } else {
-               mtx[4] = ttCHAR(comp); comp+=1;
-               mtx[5] = ttCHAR(comp); comp+=1;
-            }
-         }
-         else {
-            // @TODO handle matching point
-            STBTT_assert(0);
-         }
-         if (flags & (1<<3)) { // WE_HAVE_A_SCALE
-            mtx[0] = mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
-            mtx[1] = mtx[2] = 0;
-         } else if (flags & (1<<6)) { // WE_HAVE_AN_X_AND_YSCALE
-            mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
-            mtx[1] = mtx[2] = 0;
-            mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
-         } else if (flags & (1<<7)) { // WE_HAVE_A_TWO_BY_TWO
-            mtx[0] = ttSHORT(comp)/16384.0f; comp+=2;
-            mtx[1] = ttSHORT(comp)/16384.0f; comp+=2;
-            mtx[2] = ttSHORT(comp)/16384.0f; comp+=2;
-            mtx[3] = ttSHORT(comp)/16384.0f; comp+=2;
-         }
-
-         // Find transformation scales.
-         m = (float) STBTT_sqrt(mtx[0]*mtx[0] + mtx[1]*mtx[1]);
-         n = (float) STBTT_sqrt(mtx[2]*mtx[2] + mtx[3]*mtx[3]);
-
-         // Get indexed glyph.
-         comp_num_verts = stbtt_GetGlyphShape(info, gidx, &comp_verts);
-         if (comp_num_verts > 0) {
-            // Transform vertices.
-            for (i = 0; i < comp_num_verts; ++i) {
-               stbtt_vertex* v = &comp_verts[i];
-               stbtt_vertex_type x,y;
-               x=v->x; y=v->y;
-               v->x = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
-               v->y = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
-               x=v->cx; y=v->cy;
-               v->cx = (stbtt_vertex_type)(m * (mtx[0]*x + mtx[2]*y + mtx[4]));
-               v->cy = (stbtt_vertex_type)(n * (mtx[1]*x + mtx[3]*y + mtx[5]));
-            }
-            // Append vertices.
-            tmp = (stbtt_vertex*)STBTT_malloc((num_vertices+comp_num_verts)*sizeof(stbtt_vertex), info->userdata);
-            if (!tmp) {
-               if (vertices) STBTT_free(vertices, info->userdata);
-               if (comp_verts) STBTT_free(comp_verts, info->userdata);
-               return 0;
-            }
-            if (num_vertices > 0 && vertices) STBTT_memcpy(tmp, vertices, num_vertices*sizeof(stbtt_vertex));
-            STBTT_memcpy(tmp+num_vertices, comp_verts, comp_num_verts*sizeof(stbtt_vertex));
-            if (vertices) STBTT_free(vertices, info->userdata);
-            vertices = tmp;
-            STBTT_free(comp_verts, info->userdata);
-            num_vertices += comp_num_verts;
-         }
-         // More components ?
-         more = flags & (1<<5);
-      }
-   } else {
-      // numberOfCounters == 0, do nothing
-   }
-
-   *pvertices = vertices;
-   return num_vertices;
-}
-
-typedef struct
-{
-   int bounds;
-   int started;
-   float first_x, first_y;
-   float x, y;
-   stbtt_int32 min_x, max_x, min_y, max_y;
-
-   stbtt_vertex *pvertices;
-   int num_vertices;
-} stbtt__csctx;
-
-#define STBTT__CSCTX_INIT(bounds) {bounds,0, 0,0, 0,0, 0,0,0,0, NULL, 0}
-
-static void stbtt__track_vertex(stbtt__csctx *c, stbtt_int32 x, stbtt_int32 y)
-{
-   if (x > c->max_x || !c->started) c->max_x = x;
-   if (y > c->max_y || !c->started) c->max_y = y;
-   if (x < c->min_x || !c->started) c->min_x = x;
-   if (y < c->min_y || !c->started) c->min_y = y;
-   c->started = 1;
-}
-
-static void stbtt__csctx_v(stbtt__csctx *c, stbtt_uint8 type, stbtt_int32 x, stbtt_int32 y, stbtt_int32 cx, stbtt_int32 cy, stbtt_int32 cx1, stbtt_int32 cy1)
-{
-   if (c->bounds) {
-      stbtt__track_vertex(c, x, y);
-      if (type == STBTT_vcubic) {
-         stbtt__track_vertex(c, cx, cy);
-         stbtt__track_vertex(c, cx1, cy1);
-      }
-   } else {
-      stbtt_setvertex(&c->pvertices[c->num_vertices], type, x, y, cx, cy);
-      c->pvertices[c->num_vertices].cx1 = (stbtt_int16) cx1;
-      c->pvertices[c->num_vertices].cy1 = (stbtt_int16) cy1;
-   }
-   c->num_vertices++;
-}
-
-static void stbtt__csctx_close_shape(stbtt__csctx *ctx)
-{
-   if (ctx->first_x != ctx->x || ctx->first_y != ctx->y)
-      stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->first_x, (int)ctx->first_y, 0, 0, 0, 0);
-}
-
-static void stbtt__csctx_rmove_to(stbtt__csctx *ctx, float dx, float dy)
-{
-   stbtt__csctx_close_shape(ctx);
-   ctx->first_x = ctx->x = ctx->x + dx;
-   ctx->first_y = ctx->y = ctx->y + dy;
-   stbtt__csctx_v(ctx, STBTT_vmove, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0);
-}
-
-static void stbtt__csctx_rline_to(stbtt__csctx *ctx, float dx, float dy)
-{
-   ctx->x += dx;
-   ctx->y += dy;
-   stbtt__csctx_v(ctx, STBTT_vline, (int)ctx->x, (int)ctx->y, 0, 0, 0, 0);
-}
-
-static void stbtt__csctx_rccurve_to(stbtt__csctx *ctx, float dx1, float dy1, float dx2, float dy2, float dx3, float dy3)
-{
-   float cx1 = ctx->x + dx1;
-   float cy1 = ctx->y + dy1;
-   float cx2 = cx1 + dx2;
-   float cy2 = cy1 + dy2;
-   ctx->x = cx2 + dx3;
-   ctx->y = cy2 + dy3;
-   stbtt__csctx_v(ctx, STBTT_vcubic, (int)ctx->x, (int)ctx->y, (int)cx1, (int)cy1, (int)cx2, (int)cy2);
-}
-
-static stbtt__buf stbtt__get_subr(stbtt__buf idx, int n)
-{
-   int count = stbtt__cff_index_count(&idx);
-   int bias = 107;
-   if (count >= 33900)
-      bias = 32768;
-   else if (count >= 1240)
-      bias = 1131;
-   n += bias;
-   if (n < 0 || n >= count)
-      return stbtt__new_buf(NULL, 0);
-   return stbtt__cff_index_get(idx, n);
-}
-
-static stbtt__buf stbtt__cid_get_glyph_subrs(const stbtt_fontinfo *info, int glyph_index)
-{
-   stbtt__buf fdselect = info->fdselect;
-   int nranges, start, end, v, fmt, fdselector = -1, i;
-
-   stbtt__buf_seek(&fdselect, 0);
-   fmt = stbtt__buf_get8(&fdselect);
-   if (fmt == 0) {
-      // untested
-      stbtt__buf_skip(&fdselect, glyph_index);
-      fdselector = stbtt__buf_get8(&fdselect);
-   } else if (fmt == 3) {
-      nranges = stbtt__buf_get16(&fdselect);
-      start = stbtt__buf_get16(&fdselect);
-      for (i = 0; i < nranges; i++) {
-         v = stbtt__buf_get8(&fdselect);
-         end = stbtt__buf_get16(&fdselect);
-         if (glyph_index >= start && glyph_index < end) {
-            fdselector = v;
-            break;
-         }
-         start = end;
-      }
-   }
-   if (fdselector == -1) stbtt__new_buf(NULL, 0);
-   return stbtt__get_subrs(info->cff, stbtt__cff_index_get(info->fontdicts, fdselector));
-}
-
-static int stbtt__run_charstring(const stbtt_fontinfo *info, int glyph_index, stbtt__csctx *c)
-{
-   int in_header = 1, maskbits = 0, subr_stack_height = 0, sp = 0, v, i, b0;
-   int has_subrs = 0, clear_stack;
-   float s[48];
-   stbtt__buf subr_stack[10], subrs = info->subrs, b;
-   float f;
-
-#define STBTT__CSERR(s) (0)
-
-   // this currently ignores the initial width value, which isn't needed if we have hmtx
-   b = stbtt__cff_index_get(info->charstrings, glyph_index);
-   while (b.cursor < b.size) {
-      i = 0;
-      clear_stack = 1;
-      b0 = stbtt__buf_get8(&b);
-      switch (b0) {
-      // @TODO implement hinting
-      case 0x13: // hintmask
-      case 0x14: // cntrmask
-         if (in_header)
-            maskbits += (sp / 2); // implicit "vstem"
-         in_header = 0;
-         stbtt__buf_skip(&b, (maskbits + 7) / 8);
-         break;
-
-      case 0x01: // hstem
-      case 0x03: // vstem
-      case 0x12: // hstemhm
-      case 0x17: // vstemhm
-         maskbits += (sp / 2);
-         break;
-
-      case 0x15: // rmoveto
-         in_header = 0;
-         if (sp < 2) return STBTT__CSERR("rmoveto stack");
-         stbtt__csctx_rmove_to(c, s[sp-2], s[sp-1]);
-         break;
-      case 0x04: // vmoveto
-         in_header = 0;
-         if (sp < 1) return STBTT__CSERR("vmoveto stack");
-         stbtt__csctx_rmove_to(c, 0, s[sp-1]);
-         break;
-      case 0x16: // hmoveto
-         in_header = 0;
-         if (sp < 1) return STBTT__CSERR("hmoveto stack");
-         stbtt__csctx_rmove_to(c, s[sp-1], 0);
-         break;
-
-      case 0x05: // rlineto
-         if (sp < 2) return STBTT__CSERR("rlineto stack");
-         for (; i + 1 < sp; i += 2)
-            stbtt__csctx_rline_to(c, s[i], s[i+1]);
-         break;
-
-      // hlineto/vlineto and vhcurveto/hvcurveto alternate horizontal and vertical
-      // starting from a different place.
-
-      case 0x07: // vlineto
-         if (sp < 1) return STBTT__CSERR("vlineto stack");
-         goto vlineto;
-      case 0x06: // hlineto
-         if (sp < 1) return STBTT__CSERR("hlineto stack");
-         for (;;) {
-            if (i >= sp) break;
-            stbtt__csctx_rline_to(c, s[i], 0);
-            i++;
-      vlineto:
-            if (i >= sp) break;
-            stbtt__csctx_rline_to(c, 0, s[i]);
-            i++;
-         }
-         break;
-
-      case 0x1F: // hvcurveto
-         if (sp < 4) return STBTT__CSERR("hvcurveto stack");
-         goto hvcurveto;
-      case 0x1E: // vhcurveto
-         if (sp < 4) return STBTT__CSERR("vhcurveto stack");
-         for (;;) {
-            if (i + 3 >= sp) break;
-            stbtt__csctx_rccurve_to(c, 0, s[i], s[i+1], s[i+2], s[i+3], (sp - i == 5) ? s[i + 4] : 0.0f);
-            i += 4;
-      hvcurveto:
-            if (i + 3 >= sp) break;
-            stbtt__csctx_rccurve_to(c, s[i], 0, s[i+1], s[i+2], (sp - i == 5) ? s[i+4] : 0.0f, s[i+3]);
-            i += 4;
-         }
-         break;
-
-      case 0x08: // rrcurveto
-         if (sp < 6) return STBTT__CSERR("rcurveline stack");
-         for (; i + 5 < sp; i += 6)
-            stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
-         break;
-
-      case 0x18: // rcurveline
-         if (sp < 8) return STBTT__CSERR("rcurveline stack");
-         for (; i + 5 < sp - 2; i += 6)
-            stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
-         if (i + 1 >= sp) return STBTT__CSERR("rcurveline stack");
-         stbtt__csctx_rline_to(c, s[i], s[i+1]);
-         break;
-
-      case 0x19: // rlinecurve
-         if (sp < 8) return STBTT__CSERR("rlinecurve stack");
-         for (; i + 1 < sp - 6; i += 2)
-            stbtt__csctx_rline_to(c, s[i], s[i+1]);
-         if (i + 5 >= sp) return STBTT__CSERR("rlinecurve stack");
-         stbtt__csctx_rccurve_to(c, s[i], s[i+1], s[i+2], s[i+3], s[i+4], s[i+5]);
-         break;
-
-      case 0x1A: // vvcurveto
-      case 0x1B: // hhcurveto
-         if (sp < 4) return STBTT__CSERR("(vv|hh)curveto stack");
-         f = 0.0;
-         if (sp & 1) { f = s[i]; i++; }
-         for (; i + 3 < sp; i += 4) {
-            if (b0 == 0x1B)
-               stbtt__csctx_rccurve_to(c, s[i], f, s[i+1], s[i+2], s[i+3], 0.0);
-            else
-               stbtt__csctx_rccurve_to(c, f, s[i], s[i+1], s[i+2], 0.0, s[i+3]);
-            f = 0.0;
-         }
-         break;
-
-      case 0x0A: // callsubr
-         if (!has_subrs) {
-            if (info->fdselect.size)
-               subrs = stbtt__cid_get_glyph_subrs(info, glyph_index);
-            has_subrs = 1;
-         }
-         // FALLTHROUGH
-      case 0x1D: // callgsubr
-         if (sp < 1) return STBTT__CSERR("call(g|)subr stack");
-         v = (int) s[--sp];
-         if (subr_stack_height >= 10) return STBTT__CSERR("recursion limit");
-         subr_stack[subr_stack_height++] = b;
-         b = stbtt__get_subr(b0 == 0x0A ? subrs : info->gsubrs, v);
-         if (b.size == 0) return STBTT__CSERR("subr not found");
-         b.cursor = 0;
-         clear_stack = 0;
-         break;
-
-      case 0x0B: // return
-         if (subr_stack_height <= 0) return STBTT__CSERR("return outside subr");
-         b = subr_stack[--subr_stack_height];
-         clear_stack = 0;
-         break;
-
-      case 0x0E: // endchar
-         stbtt__csctx_close_shape(c);
-         return 1;
-
-      case 0x0C: { // two-byte escape
-         float dx1, dx2, dx3, dx4, dx5, dx6, dy1, dy2, dy3, dy4, dy5, dy6;
-         float dx, dy;
-         int b1 = stbtt__buf_get8(&b);
-         switch (b1) {
-         // @TODO These "flex" implementations ignore the flex-depth and resolution,
-         // and always draw beziers.
-         case 0x22: // hflex
-            if (sp < 7) return STBTT__CSERR("hflex stack");
-            dx1 = s[0];
-            dx2 = s[1];
-            dy2 = s[2];
-            dx3 = s[3];
-            dx4 = s[4];
-            dx5 = s[5];
-            dx6 = s[6];
-            stbtt__csctx_rccurve_to(c, dx1, 0, dx2, dy2, dx3, 0);
-            stbtt__csctx_rccurve_to(c, dx4, 0, dx5, -dy2, dx6, 0);
-            break;
-
-         case 0x23: // flex
-            if (sp < 13) return STBTT__CSERR("flex stack");
-            dx1 = s[0];
-            dy1 = s[1];
-            dx2 = s[2];
-            dy2 = s[3];
-            dx3 = s[4];
-            dy3 = s[5];
-            dx4 = s[6];
-            dy4 = s[7];
-            dx5 = s[8];
-            dy5 = s[9];
-            dx6 = s[10];
-            dy6 = s[11];
-            //fd is s[12]
-            stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3);
-            stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6);
-            break;
-
-         case 0x24: // hflex1
-            if (sp < 9) return STBTT__CSERR("hflex1 stack");
-            dx1 = s[0];
-            dy1 = s[1];
-            dx2 = s[2];
-            dy2 = s[3];
-            dx3 = s[4];
-            dx4 = s[5];
-            dx5 = s[6];
-            dy5 = s[7];
-            dx6 = s[8];
-            stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, 0);
-            stbtt__csctx_rccurve_to(c, dx4, 0, dx5, dy5, dx6, -(dy1+dy2+dy5));
-            break;
-
-         case 0x25: // flex1
-            if (sp < 11) return STBTT__CSERR("flex1 stack");
-            dx1 = s[0];
-            dy1 = s[1];
-            dx2 = s[2];
-            dy2 = s[3];
-            dx3 = s[4];
-            dy3 = s[5];
-            dx4 = s[6];
-            dy4 = s[7];
-            dx5 = s[8];
-            dy5 = s[9];
-            dx6 = dy6 = s[10];
-            dx = dx1+dx2+dx3+dx4+dx5;
-            dy = dy1+dy2+dy3+dy4+dy5;
-            if (STBTT_fabs(dx) > STBTT_fabs(dy))
-               dy6 = -dy;
-            else
-               dx6 = -dx;
-            stbtt__csctx_rccurve_to(c, dx1, dy1, dx2, dy2, dx3, dy3);
-            stbtt__csctx_rccurve_to(c, dx4, dy4, dx5, dy5, dx6, dy6);
-            break;
-
-         default:
-            return STBTT__CSERR("unimplemented");
-         }
-      } break;
-
-      default:
-         if (b0 != 255 && b0 != 28 && b0 < 32)
-            return STBTT__CSERR("reserved operator");
-
-         // push immediate
-         if (b0 == 255) {
-            f = (float)(stbtt_int32)stbtt__buf_get32(&b) / 0x10000;
-         } else {
-            stbtt__buf_skip(&b, -1);
-            f = (float)(stbtt_int16)stbtt__cff_int(&b);
-         }
-         if (sp >= 48) return STBTT__CSERR("push stack overflow");
-         s[sp++] = f;
-         clear_stack = 0;
-         break;
-      }
-      if (clear_stack) sp = 0;
-   }
-   return STBTT__CSERR("no endchar");
-
-#undef STBTT__CSERR
-}
-
-static int stbtt__GetGlyphShapeT2(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
-{
-   // runs the charstring twice, once to count and once to output (to avoid realloc)
-   stbtt__csctx count_ctx = STBTT__CSCTX_INIT(1);
-   stbtt__csctx output_ctx = STBTT__CSCTX_INIT(0);
-   if (stbtt__run_charstring(info, glyph_index, &count_ctx)) {
-      *pvertices = (stbtt_vertex*)STBTT_malloc(count_ctx.num_vertices*sizeof(stbtt_vertex), info->userdata);
-      output_ctx.pvertices = *pvertices;
-      if (stbtt__run_charstring(info, glyph_index, &output_ctx)) {
-         STBTT_assert(output_ctx.num_vertices == count_ctx.num_vertices);
-         return output_ctx.num_vertices;
-      }
-   }
-   *pvertices = NULL;
-   return 0;
-}
-
-static int stbtt__GetGlyphInfoT2(const stbtt_fontinfo *info, int glyph_index, int *x0, int *y0, int *x1, int *y1)
-{
-   stbtt__csctx c = STBTT__CSCTX_INIT(1);
-   int r = stbtt__run_charstring(info, glyph_index, &c);
-   if (x0)  *x0 = r ? c.min_x : 0;
-   if (y0)  *y0 = r ? c.min_y : 0;
-   if (x1)  *x1 = r ? c.max_x : 0;
-   if (y1)  *y1 = r ? c.max_y : 0;
-   return r ? c.num_vertices : 0;
-}
-
-STBTT_DEF int stbtt_GetGlyphShape(const stbtt_fontinfo *info, int glyph_index, stbtt_vertex **pvertices)
-{
-   if (!info->cff.size)
-      return stbtt__GetGlyphShapeTT(info, glyph_index, pvertices);
-   else
-      return stbtt__GetGlyphShapeT2(info, glyph_index, pvertices);
-}
-
-STBTT_DEF void stbtt_GetGlyphHMetrics(const stbtt_fontinfo *info, int glyph_index, int *advanceWidth, int *leftSideBearing)
-{
-   stbtt_uint16 numOfLongHorMetrics = ttUSHORT(info->data+info->hhea + 34);
-   if (glyph_index < numOfLongHorMetrics) {
-      if (advanceWidth)     *advanceWidth    = ttSHORT(info->data + info->hmtx + 4*glyph_index);
-      if (leftSideBearing)  *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*glyph_index + 2);
-   } else {
-      if (advanceWidth)     *advanceWidth    = ttSHORT(info->data + info->hmtx + 4*(numOfLongHorMetrics-1));
-      if (leftSideBearing)  *leftSideBearing = ttSHORT(info->data + info->hmtx + 4*numOfLongHorMetrics + 2*(glyph_index - numOfLongHorMetrics));
-   }
-}
-
-STBTT_DEF int  stbtt_GetKerningTableLength(const stbtt_fontinfo *info)
-{
-   stbtt_uint8 *data = info->data + info->kern;
-
-   // we only look at the first table. it must be 'horizontal' and format 0.
-   if (!info->kern)
-      return 0;
-   if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
-      return 0;
-   if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
-      return 0;
-
-   return ttUSHORT(data+10);
-}
-
-STBTT_DEF int stbtt_GetKerningTable(const stbtt_fontinfo *info, stbtt_kerningentry* table, int table_length)
-{
-   stbtt_uint8 *data = info->data + info->kern;
-   int k, length;
-
-   // we only look at the first table. it must be 'horizontal' and format 0.
-   if (!info->kern)
-      return 0;
-   if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
-      return 0;
-   if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
-      return 0;
-
-   length = ttUSHORT(data+10);
-   if (table_length < length)
-      length = table_length;
-
-   for (k = 0; k < length; k++)
-   {
-      table[k].glyph1 = ttUSHORT(data+18+(k*6));
-      table[k].glyph2 = ttUSHORT(data+20+(k*6));
-      table[k].advance = ttSHORT(data+22+(k*6));
-   }
-
-   return length;
-}
-
-static int stbtt__GetGlyphKernInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
-{
-   stbtt_uint8 *data = info->data + info->kern;
-   stbtt_uint32 needle, straw;
-   int l, r, m;
-
-   // we only look at the first table. it must be 'horizontal' and format 0.
-   if (!info->kern)
-      return 0;
-   if (ttUSHORT(data+2) < 1) // number of tables, need at least 1
-      return 0;
-   if (ttUSHORT(data+8) != 1) // horizontal flag must be set in format
-      return 0;
-
-   l = 0;
-   r = ttUSHORT(data+10) - 1;
-   needle = glyph1 << 16 | glyph2;
-   while (l <= r) {
-      m = (l + r) >> 1;
-      straw = ttULONG(data+18+(m*6)); // note: unaligned read
-      if (needle < straw)
-         r = m - 1;
-      else if (needle > straw)
-         l = m + 1;
-      else
-         return ttSHORT(data+22+(m*6));
-   }
-   return 0;
-}
-
-static stbtt_int32 stbtt__GetCoverageIndex(stbtt_uint8 *coverageTable, int glyph)
-{
-   stbtt_uint16 coverageFormat = ttUSHORT(coverageTable);
-   switch (coverageFormat) {
-      case 1: {
-         stbtt_uint16 glyphCount = ttUSHORT(coverageTable + 2);
-
-         // Binary search.
-         stbtt_int32 l=0, r=glyphCount-1, m;
-         int straw, needle=glyph;
-         while (l <= r) {
-            stbtt_uint8 *glyphArray = coverageTable + 4;
-            stbtt_uint16 glyphID;
-            m = (l + r) >> 1;
-            glyphID = ttUSHORT(glyphArray + 2 * m);
-            straw = glyphID;
-            if (needle < straw)
-               r = m - 1;
-            else if (needle > straw)
-               l = m + 1;
-            else {
-               return m;
-            }
-         }
-         break;
-      }
-
-      case 2: {
-         stbtt_uint16 rangeCount = ttUSHORT(coverageTable + 2);
-         stbtt_uint8 *rangeArray = coverageTable + 4;
-
-         // Binary search.
-         stbtt_int32 l=0, r=rangeCount-1, m;
-         int strawStart, strawEnd, needle=glyph;
-         while (l <= r) {
-            stbtt_uint8 *rangeRecord;
-            m = (l + r) >> 1;
-            rangeRecord = rangeArray + 6 * m;
-            strawStart = ttUSHORT(rangeRecord);
-            strawEnd = ttUSHORT(rangeRecord + 2);
-            if (needle < strawStart)
-               r = m - 1;
-            else if (needle > strawEnd)
-               l = m + 1;
-            else {
-               stbtt_uint16 startCoverageIndex = ttUSHORT(rangeRecord + 4);
-               return startCoverageIndex + glyph - strawStart;
-            }
-         }
-         break;
-      }
-
-      default: return -1; // unsupported
-   }
-
-   return -1;
-}
-
-static stbtt_int32  stbtt__GetGlyphClass(stbtt_uint8 *classDefTable, int glyph)
-{
-   stbtt_uint16 classDefFormat = ttUSHORT(classDefTable);
-   switch (classDefFormat)
-   {
-      case 1: {
-         stbtt_uint16 startGlyphID = ttUSHORT(classDefTable + 2);
-         stbtt_uint16 glyphCount = ttUSHORT(classDefTable + 4);
-         stbtt_uint8 *classDef1ValueArray = classDefTable + 6;
-
-         if (glyph >= startGlyphID && glyph < startGlyphID + glyphCount)
-            return (stbtt_int32)ttUSHORT(classDef1ValueArray + 2 * (glyph - startGlyphID));
-         break;
-      }
-
-      case 2: {
-         stbtt_uint16 classRangeCount = ttUSHORT(classDefTable + 2);
-         stbtt_uint8 *classRangeRecords = classDefTable + 4;
-
-         // Binary search.
-         stbtt_int32 l=0, r=classRangeCount-1, m;
-         int strawStart, strawEnd, needle=glyph;
-         while (l <= r) {
-            stbtt_uint8 *classRangeRecord;
-            m = (l + r) >> 1;
-            classRangeRecord = classRangeRecords + 6 * m;
-            strawStart = ttUSHORT(classRangeRecord);
-            strawEnd = ttUSHORT(classRangeRecord + 2);
-            if (needle < strawStart)
-               r = m - 1;
-            else if (needle > strawEnd)
-               l = m + 1;
-            else
-               return (stbtt_int32)ttUSHORT(classRangeRecord + 4);
-         }
-         break;
-      }
-
-      default:
-         return -1; // Unsupported definition type, return an error.
-   }
-
-   // "All glyphs not assigned to a class fall into class 0". (OpenType spec)
-   return 0;
-}
-
-// Define to STBTT_assert(x) if you want to break on unimplemented formats.
-#define STBTT_GPOS_TODO_assert(x)
-
-static stbtt_int32 stbtt__GetGlyphGPOSInfoAdvance(const stbtt_fontinfo *info, int glyph1, int glyph2)
-{
-   stbtt_uint16 lookupListOffset;
-   stbtt_uint8 *lookupList;
-   stbtt_uint16 lookupCount;
-   stbtt_uint8 *data;
-   stbtt_int32 i, sti;
-
-   if (!info->gpos) return 0;
-
-   data = info->data + info->gpos;
-
-   if (ttUSHORT(data+0) != 1) return 0; // Major version 1
-   if (ttUSHORT(data+2) != 0) return 0; // Minor version 0
-
-   lookupListOffset = ttUSHORT(data+8);
-   lookupList = data + lookupListOffset;
-   lookupCount = ttUSHORT(lookupList);
-
-   for (i=0; i<lookupCount; ++i) {
-      stbtt_uint16 lookupOffset = ttUSHORT(lookupList + 2 + 2 * i);
-      stbtt_uint8 *lookupTable = lookupList + lookupOffset;
-
-      stbtt_uint16 lookupType = ttUSHORT(lookupTable);
-      stbtt_uint16 subTableCount = ttUSHORT(lookupTable + 4);
-      stbtt_uint8 *subTableOffsets = lookupTable + 6;
-      if (lookupType != 2) // Pair Adjustment Positioning Subtable
-         continue;
-
-      for (sti=0; sti<subTableCount; sti++) {
-         stbtt_uint16 subtableOffset = ttUSHORT(subTableOffsets + 2 * sti);
-         stbtt_uint8 *table = lookupTable + subtableOffset;
-         stbtt_uint16 posFormat = ttUSHORT(table);
-         stbtt_uint16 coverageOffset = ttUSHORT(table + 2);
-         stbtt_int32 coverageIndex = stbtt__GetCoverageIndex(table + coverageOffset, glyph1);
-         if (coverageIndex == -1) continue;
-
-         switch (posFormat) {
-            case 1: {
-               stbtt_int32 l, r, m;
-               int straw, needle;
-               stbtt_uint16 valueFormat1 = ttUSHORT(table + 4);
-               stbtt_uint16 valueFormat2 = ttUSHORT(table + 6);
-               if (valueFormat1 == 4 && valueFormat2 == 0) { // Support more formats?
-                  stbtt_int32 valueRecordPairSizeInBytes = 2;
-                  stbtt_uint16 pairSetCount = ttUSHORT(table + 8);
-                  stbtt_uint16 pairPosOffset = ttUSHORT(table + 10 + 2 * coverageIndex);
-                  stbtt_uint8 *pairValueTable = table + pairPosOffset;
-                  stbtt_uint16 pairValueCount = ttUSHORT(pairValueTable);
-                  stbtt_uint8 *pairValueArray = pairValueTable + 2;
-
-                  if (coverageIndex >= pairSetCount) return 0;
-
-                  needle=glyph2;
-                  r=pairValueCount-1;
-                  l=0;
-
-                  // Binary search.
-                  while (l <= r) {
-                     stbtt_uint16 secondGlyph;
-                     stbtt_uint8 *pairValue;
-                     m = (l + r) >> 1;
-                     pairValue = pairValueArray + (2 + valueRecordPairSizeInBytes) * m;
-                     secondGlyph = ttUSHORT(pairValue);
-                     straw = secondGlyph;
-                     if (needle < straw)
-                        r = m - 1;
-                     else if (needle > straw)
-                        l = m + 1;
-                     else {
-                        stbtt_int16 xAdvance = ttSHORT(pairValue + 2);
-                        return xAdvance;
-                     }
-                  }
-               } else
-                  return 0;
-               break;
-            }
-
-            case 2: {
-               stbtt_uint16 valueFormat1 = ttUSHORT(table + 4);
-               stbtt_uint16 valueFormat2 = ttUSHORT(table + 6);
-               if (valueFormat1 == 4 && valueFormat2 == 0) { // Support more formats?
-                  stbtt_uint16 classDef1Offset = ttUSHORT(table + 8);
-                  stbtt_uint16 classDef2Offset = ttUSHORT(table + 10);
-                  int glyph1class = stbtt__GetGlyphClass(table + classDef1Offset, glyph1);
-                  int glyph2class = stbtt__GetGlyphClass(table + classDef2Offset, glyph2);
-
-                  stbtt_uint16 class1Count = ttUSHORT(table + 12);
-                  stbtt_uint16 class2Count = ttUSHORT(table + 14);
-                  stbtt_uint8 *class1Records, *class2Records;
-                  stbtt_int16 xAdvance;
-
-                  if (glyph1class < 0 || glyph1class >= class1Count) return 0; // malformed
-                  if (glyph2class < 0 || glyph2class >= class2Count) return 0; // malformed
-
-                  class1Records = table + 16;
-                  class2Records = class1Records + 2 * (glyph1class * class2Count);
-                  xAdvance = ttSHORT(class2Records + 2 * glyph2class);
-                  return xAdvance;
-               } else
-                  return 0;
-               break;
-            }
-
-            default:
-               return 0; // Unsupported position format
-         }
-      }
-   }
-
-   return 0;
-}
-
-STBTT_DEF int  stbtt_GetGlyphKernAdvance(const stbtt_fontinfo *info, int g1, int g2)
-{
-   int xAdvance = 0;
-
-   if (info->gpos)
-      xAdvance += stbtt__GetGlyphGPOSInfoAdvance(info, g1, g2);
-   else if (info->kern)
-      xAdvance += stbtt__GetGlyphKernInfoAdvance(info, g1, g2);
-
-   return xAdvance;
-}
-
-STBTT_DEF int  stbtt_GetCodepointKernAdvance(const stbtt_fontinfo *info, int ch1, int ch2)
-{
-   if (!info->kern && !info->gpos) // if no kerning table, don't waste time looking up both codepoint->glyphs
-      return 0;
-   return stbtt_GetGlyphKernAdvance(info, stbtt_FindGlyphIndex(info,ch1), stbtt_FindGlyphIndex(info,ch2));
-}
-
-STBTT_DEF void stbtt_GetCodepointHMetrics(const stbtt_fontinfo *info, int codepoint, int *advanceWidth, int *leftSideBearing)
-{
-   stbtt_GetGlyphHMetrics(info, stbtt_FindGlyphIndex(info,codepoint), advanceWidth, leftSideBearing);
-}
-
-STBTT_DEF void stbtt_GetFontVMetrics(const stbtt_fontinfo *info, int *ascent, int *descent, int *lineGap)
-{
-   if (ascent ) *ascent  = ttSHORT(info->data+info->hhea + 4);
-   if (descent) *descent = ttSHORT(info->data+info->hhea + 6);
-   if (lineGap) *lineGap = ttSHORT(info->data+info->hhea + 8);
-}
-
-STBTT_DEF int  stbtt_GetFontVMetricsOS2(const stbtt_fontinfo *info, int *typoAscent, int *typoDescent, int *typoLineGap)
-{
-   int tab = stbtt__find_table(info->data, info->fontstart, "OS/2");
-   if (!tab)
-      return 0;
-   if (typoAscent ) *typoAscent  = ttSHORT(info->data+tab + 68);
-   if (typoDescent) *typoDescent = ttSHORT(info->data+tab + 70);
-   if (typoLineGap) *typoLineGap = ttSHORT(info->data+tab + 72);
-   return 1;
-}
-
-STBTT_DEF void stbtt_GetFontBoundingBox(const stbtt_fontinfo *info, int *x0, int *y0, int *x1, int *y1)
-{
-   *x0 = ttSHORT(info->data + info->head + 36);
-   *y0 = ttSHORT(info->data + info->head + 38);
-   *x1 = ttSHORT(info->data + info->head + 40);
-   *y1 = ttSHORT(info->data + info->head + 42);
-}
-
-STBTT_DEF float stbtt_ScaleForPixelHeight(const stbtt_fontinfo *info, float height)
-{
-   int fheight = ttSHORT(info->data + info->hhea + 4) - ttSHORT(info->data + info->hhea + 6);
-   return (float) height / fheight;
-}
-
-STBTT_DEF float stbtt_ScaleForMappingEmToPixels(const stbtt_fontinfo *info, float pixels)
-{
-   int unitsPerEm = ttUSHORT(info->data + info->head + 18);
-   return pixels / unitsPerEm;
-}
-
-STBTT_DEF void stbtt_FreeShape(const stbtt_fontinfo *info, stbtt_vertex *v)
-{
-   STBTT_free(v, info->userdata);
-}
-
-STBTT_DEF stbtt_uint8 *stbtt_FindSVGDoc(const stbtt_fontinfo *info, int gl)
-{
-   int i;
-   stbtt_uint8 *data = info->data;
-   stbtt_uint8 *svg_doc_list = data + stbtt__get_svg((stbtt_fontinfo *) info);
-
-   int numEntries = ttUSHORT(svg_doc_list);
-   stbtt_uint8 *svg_docs = svg_doc_list + 2;
-
-   for(i=0; i<numEntries; i++) {
-      stbtt_uint8 *svg_doc = svg_docs + (12 * i);
-      if ((gl >= ttUSHORT(svg_doc)) && (gl <= ttUSHORT(svg_doc + 2)))
-         return svg_doc;
-   }
-   return 0;
-}
-
-STBTT_DEF int stbtt_GetGlyphSVG(const stbtt_fontinfo *info, int gl, const char **svg)
-{
-   stbtt_uint8 *data = info->data;
-   stbtt_uint8 *svg_doc;
-
-   if (info->svg == 0)
-      return 0;
-
-   svg_doc = stbtt_FindSVGDoc(info, gl);
-   if (svg_doc != NULL) {
-      *svg = (char *) data + info->svg + ttULONG(svg_doc + 4);
-      return ttULONG(svg_doc + 8);
-   } else {
-      return 0;
-   }
-}
-
-STBTT_DEF int stbtt_GetCodepointSVG(const stbtt_fontinfo *info, int unicode_codepoint, const char **svg)
-{
-   return stbtt_GetGlyphSVG(info, stbtt_FindGlyphIndex(info, unicode_codepoint), svg);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// antialiasing software rasterizer
-//
-
-STBTT_DEF void stbtt_GetGlyphBitmapBoxSubpixel(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y,float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
-   int x0=0,y0=0,x1,y1; // =0 suppresses compiler warning
-   if (!stbtt_GetGlyphBox(font, glyph, &x0,&y0,&x1,&y1)) {
-      // e.g. space character
-      if (ix0) *ix0 = 0;
-      if (iy0) *iy0 = 0;
-      if (ix1) *ix1 = 0;
-      if (iy1) *iy1 = 0;
-   } else {
-      // move to integral bboxes (treating pixels as little squares, what pixels get touched)?
-      if (ix0) *ix0 = STBTT_ifloor( x0 * scale_x + shift_x);
-      if (iy0) *iy0 = STBTT_ifloor(-y1 * scale_y + shift_y);
-      if (ix1) *ix1 = STBTT_iceil ( x1 * scale_x + shift_x);
-      if (iy1) *iy1 = STBTT_iceil (-y0 * scale_y + shift_y);
-   }
-}
-
-STBTT_DEF void stbtt_GetGlyphBitmapBox(const stbtt_fontinfo *font, int glyph, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
-   stbtt_GetGlyphBitmapBoxSubpixel(font, glyph, scale_x, scale_y,0.0f,0.0f, ix0, iy0, ix1, iy1);
-}
-
-STBTT_DEF void stbtt_GetCodepointBitmapBoxSubpixel(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, float shift_x, float shift_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
-   stbtt_GetGlyphBitmapBoxSubpixel(font, stbtt_FindGlyphIndex(font,codepoint), scale_x, scale_y,shift_x,shift_y, ix0,iy0,ix1,iy1);
-}
-
-STBTT_DEF void stbtt_GetCodepointBitmapBox(const stbtt_fontinfo *font, int codepoint, float scale_x, float scale_y, int *ix0, int *iy0, int *ix1, int *iy1)
-{
-   stbtt_GetCodepointBitmapBoxSubpixel(font, codepoint, scale_x, scale_y,0.0f,0.0f, ix0,iy0,ix1,iy1);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-//  Rasterizer
-
-typedef struct stbtt__hheap_chunk
-{
-   struct stbtt__hheap_chunk *next;
-} stbtt__hheap_chunk;
-
-typedef struct stbtt__hheap
-{
-   struct stbtt__hheap_chunk *head;
-   void   *first_free;
-   int    num_remaining_in_head_chunk;
-} stbtt__hheap;
-
-static void *stbtt__hheap_alloc(stbtt__hheap *hh, size_t size, void *userdata)
-{
-   if (hh->first_free) {
-      void *p = hh->first_free;
-      hh->first_free = * (void **) p;
-      return p;
-   } else {
-      if (hh->num_remaining_in_head_chunk == 0) {
-         int count = (size < 32 ? 2000 : size < 128 ? 800 : 100);
-         stbtt__hheap_chunk *c = (stbtt__hheap_chunk *) STBTT_malloc(sizeof(stbtt__hheap_chunk) + size * count, userdata);
-         if (c == NULL)
-            return NULL;
-         c->next = hh->head;
-         hh->head = c;
-         hh->num_remaining_in_head_chunk = count;
-      }
-      --hh->num_remaining_in_head_chunk;
-      return (char *) (hh->head) + sizeof(stbtt__hheap_chunk) + size * hh->num_remaining_in_head_chunk;
-   }
-}
-
-static void stbtt__hheap_free(stbtt__hheap *hh, void *p)
-{
-   *(void **) p = hh->first_free;
-   hh->first_free = p;
-}
-
-static void stbtt__hheap_cleanup(stbtt__hheap *hh, void *userdata)
-{
-   stbtt__hheap_chunk *c = hh->head;
-   while (c) {
-      stbtt__hheap_chunk *n = c->next;
-      STBTT_free(c, userdata);
-      c = n;
-   }
-}
-
-typedef struct stbtt__edge {
-   float x0,y0, x1,y1;
-   int invert;
-} stbtt__edge;
-
-
-typedef struct stbtt__active_edge
-{
-   struct stbtt__active_edge *next;
-   #if STBTT_RASTERIZER_VERSION==1
-   int x,dx;
-   float ey;
-   int direction;
-   #elif STBTT_RASTERIZER_VERSION==2
-   float fx,fdx,fdy;
-   float direction;
-   float sy;
-   float ey;
-   #else
-   #error "Unrecognized value of STBTT_RASTERIZER_VERSION"
-   #endif
-} stbtt__active_edge;
-
-#if STBTT_RASTERIZER_VERSION == 1
-#define STBTT_FIXSHIFT   10
-#define STBTT_FIX        (1 << STBTT_FIXSHIFT)
-#define STBTT_FIXMASK    (STBTT_FIX-1)
-
-static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
-{
-   stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
-   float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
-   STBTT_assert(z != NULL);
-   if (!z) return z;
-
-   // round dx down to avoid overshooting
-   if (dxdy < 0)
-      z->dx = -STBTT_ifloor(STBTT_FIX * -dxdy);
-   else
-      z->dx = STBTT_ifloor(STBTT_FIX * dxdy);
-
-   z->x = STBTT_ifloor(STBTT_FIX * e->x0 + z->dx * (start_point - e->y0)); // use z->dx so when we offset later it's by the same amount
-   z->x -= off_x * STBTT_FIX;
-
-   z->ey = e->y1;
-   z->next = 0;
-   z->direction = e->invert ? 1 : -1;
-   return z;
-}
-#elif STBTT_RASTERIZER_VERSION == 2
-static stbtt__active_edge *stbtt__new_active(stbtt__hheap *hh, stbtt__edge *e, int off_x, float start_point, void *userdata)
-{
-   stbtt__active_edge *z = (stbtt__active_edge *) stbtt__hheap_alloc(hh, sizeof(*z), userdata);
-   float dxdy = (e->x1 - e->x0) / (e->y1 - e->y0);
-   STBTT_assert(z != NULL);
-   //STBTT_assert(e->y0 <= start_point);
-   if (!z) return z;
-   z->fdx = dxdy;
-   z->fdy = dxdy != 0.0f ? (1.0f/dxdy) : 0.0f;
-   z->fx = e->x0 + dxdy * (start_point - e->y0);
-   z->fx -= off_x;
-   z->direction = e->invert ? 1.0f : -1.0f;
-   z->sy = e->y0;
-   z->ey = e->y1;
-   z->next = 0;
-   return z;
-}
-#else
-#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
-#endif
-
-#if STBTT_RASTERIZER_VERSION == 1
-// note: this routine clips fills that extend off the edges... ideally this
-// wouldn't happen, but it could happen if the truetype glyph bounding boxes
-// are wrong, or if the user supplies a too-small bitmap
-static void stbtt__fill_active_edges(unsigned char *scanline, int len, stbtt__active_edge *e, int max_weight)
-{
-   // non-zero winding fill
-   int x0=0, w=0;
-
-   while (e) {
-      if (w == 0) {
-         // if we're currently at zero, we need to record the edge start point
-         x0 = e->x; w += e->direction;
-      } else {
-         int x1 = e->x; w += e->direction;
-         // if we went to zero, we need to draw
-         if (w == 0) {
-            int i = x0 >> STBTT_FIXSHIFT;
-            int j = x1 >> STBTT_FIXSHIFT;
-
-            if (i < len && j >= 0) {
-               if (i == j) {
-                  // x0,x1 are the same pixel, so compute combined coverage
-                  scanline[i] = scanline[i] + (stbtt_uint8) ((x1 - x0) * max_weight >> STBTT_FIXSHIFT);
-               } else {
-                  if (i >= 0) // add antialiasing for x0
-                     scanline[i] = scanline[i] + (stbtt_uint8) (((STBTT_FIX - (x0 & STBTT_FIXMASK)) * max_weight) >> STBTT_FIXSHIFT);
-                  else
-                     i = -1; // clip
-
-                  if (j < len) // add antialiasing for x1
-                     scanline[j] = scanline[j] + (stbtt_uint8) (((x1 & STBTT_FIXMASK) * max_weight) >> STBTT_FIXSHIFT);
-                  else
-                     j = len; // clip
-
-                  for (++i; i < j; ++i) // fill pixels between x0 and x1
-                     scanline[i] = scanline[i] + (stbtt_uint8) max_weight;
-               }
-            }
-         }
-      }
-
-      e = e->next;
-   }
-}
-
-static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
-{
-   stbtt__hheap hh = { 0, 0, 0 };
-   stbtt__active_edge *active = NULL;
-   int y,j=0;
-   int max_weight = (255 / vsubsample);  // weight per vertical scanline
-   int s; // vertical subsample index
-   unsigned char scanline_data[512], *scanline;
-
-   if (result->w > 512)
-      scanline = (unsigned char *) STBTT_malloc(result->w, userdata);
-   else
-      scanline = scanline_data;
-
-   y = off_y * vsubsample;
-   e[n].y0 = (off_y + result->h) * (float) vsubsample + 1;
-
-   while (j < result->h) {
-      STBTT_memset(scanline, 0, result->w);
-      for (s=0; s < vsubsample; ++s) {
-         // find center of pixel for this scanline
-         float scan_y = y + 0.5f;
-         stbtt__active_edge **step = &active;
-
-         // update all active edges;
-         // remove all active edges that terminate before the center of this scanline
-         while (*step) {
-            stbtt__active_edge * z = *step;
-            if (z->ey <= scan_y) {
-               *step = z->next; // delete from list
-               STBTT_assert(z->direction);
-               z->direction = 0;
-               stbtt__hheap_free(&hh, z);
-            } else {
-               z->x += z->dx; // advance to position for current scanline
-               step = &((*step)->next); // advance through list
-            }
-         }
-
-         // resort the list if needed
-         for(;;) {
-            int changed=0;
-            step = &active;
-            while (*step && (*step)->next) {
-               if ((*step)->x > (*step)->next->x) {
-                  stbtt__active_edge *t = *step;
-                  stbtt__active_edge *q = t->next;
-
-                  t->next = q->next;
-                  q->next = t;
-                  *step = q;
-                  changed = 1;
-               }
-               step = &(*step)->next;
-            }
-            if (!changed) break;
-         }
-
-         // insert all edges that start before the center of this scanline -- omit ones that also end on this scanline
-         while (e->y0 <= scan_y) {
-            if (e->y1 > scan_y) {
-               stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y, userdata);
-               if (z != NULL) {
-                  // find insertion point
-                  if (active == NULL)
-                     active = z;
-                  else if (z->x < active->x) {
-                     // insert at front
-                     z->next = active;
-                     active = z;
-                  } else {
-                     // find thing to insert AFTER
-                     stbtt__active_edge *p = active;
-                     while (p->next && p->next->x < z->x)
-                        p = p->next;
-                     // at this point, p->next->x is NOT < z->x
-                     z->next = p->next;
-                     p->next = z;
-                  }
-               }
-            }
-            ++e;
-         }
-
-         // now process all active edges in XOR fashion
-         if (active)
-            stbtt__fill_active_edges(scanline, result->w, active, max_weight);
-
-         ++y;
-      }
-      STBTT_memcpy(result->pixels + j * result->stride, scanline, result->w);
-      ++j;
-   }
-
-   stbtt__hheap_cleanup(&hh, userdata);
-
-   if (scanline != scanline_data)
-      STBTT_free(scanline, userdata);
-}
-
-#elif STBTT_RASTERIZER_VERSION == 2
-
-// the edge passed in here does not cross the vertical line at x or the vertical line at x+1
-// (i.e. it has already been clipped to those)
-static void stbtt__handle_clipped_edge(float *scanline, int x, stbtt__active_edge *e, float x0, float y0, float x1, float y1)
-{
-   if (y0 == y1) return;
-   STBTT_assert(y0 < y1);
-   STBTT_assert(e->sy <= e->ey);
-   if (y0 > e->ey) return;
-   if (y1 < e->sy) return;
-   if (y0 < e->sy) {
-      x0 += (x1-x0) * (e->sy - y0) / (y1-y0);
-      y0 = e->sy;
-   }
-   if (y1 > e->ey) {
-      x1 += (x1-x0) * (e->ey - y1) / (y1-y0);
-      y1 = e->ey;
-   }
-
-   if (x0 == x)
-      STBTT_assert(x1 <= x+1);
-   else if (x0 == x+1)
-      STBTT_assert(x1 >= x);
-   else if (x0 <= x)
-      STBTT_assert(x1 <= x);
-   else if (x0 >= x+1)
-      STBTT_assert(x1 >= x+1);
-   else
-      STBTT_assert(x1 >= x && x1 <= x+1);
-
-   if (x0 <= x && x1 <= x)
-      scanline[x] += e->direction * (y1-y0);
-   else if (x0 >= x+1 && x1 >= x+1)
-      ;
-   else {
-      STBTT_assert(x0 >= x && x0 <= x+1 && x1 >= x && x1 <= x+1);
-      scanline[x] += e->direction * (y1-y0) * (1-((x0-x)+(x1-x))/2); // coverage = 1 - average x position
-   }
-}
-
-static float stbtt__sized_trapezoid_area(float height, float top_width, float bottom_width)
-{
-   STBTT_assert(top_width >= 0);
-   STBTT_assert(bottom_width >= 0);
-   return (top_width + bottom_width) / 2.0f * height;
-}
-
-static float stbtt__position_trapezoid_area(float height, float tx0, float tx1, float bx0, float bx1)
-{
-   return stbtt__sized_trapezoid_area(height, tx1 - tx0, bx1 - bx0);
-}
-
-static float stbtt__sized_triangle_area(float height, float width)
-{
-   return height * width / 2;
-}
-
-static void stbtt__fill_active_edges_new(float *scanline, float *scanline_fill, int len, stbtt__active_edge *e, float y_top)
-{
-   float y_bottom = y_top+1;
-
-   while (e) {
-      // brute force every pixel
-
-      // compute intersection points with top & bottom
-      STBTT_assert(e->ey >= y_top);
-
-      if (e->fdx == 0) {
-         float x0 = e->fx;
-         if (x0 < len) {
-            if (x0 >= 0) {
-               stbtt__handle_clipped_edge(scanline,(int) x0,e, x0,y_top, x0,y_bottom);
-               stbtt__handle_clipped_edge(scanline_fill-1,(int) x0+1,e, x0,y_top, x0,y_bottom);
-            } else {
-               stbtt__handle_clipped_edge(scanline_fill-1,0,e, x0,y_top, x0,y_bottom);
-            }
-         }
-      } else {
-         float x0 = e->fx;
-         float dx = e->fdx;
-         float xb = x0 + dx;
-         float x_top, x_bottom;
-         float sy0,sy1;
-         float dy = e->fdy;
-         STBTT_assert(e->sy <= y_bottom && e->ey >= y_top);
-
-         // compute endpoints of line segment clipped to this scanline (if the
-         // line segment starts on this scanline. x0 is the intersection of the
-         // line with y_top, but that may be off the line segment.
-         if (e->sy > y_top) {
-            x_top = x0 + dx * (e->sy - y_top);
-            sy0 = e->sy;
-         } else {
-            x_top = x0;
-            sy0 = y_top;
-         }
-         if (e->ey < y_bottom) {
-            x_bottom = x0 + dx * (e->ey - y_top);
-            sy1 = e->ey;
-         } else {
-            x_bottom = xb;
-            sy1 = y_bottom;
-         }
-
-         if (x_top >= 0 && x_bottom >= 0 && x_top < len && x_bottom < len) {
-            // from here on, we don't have to range check x values
-
-            if ((int) x_top == (int) x_bottom) {
-               float height;
-               // simple case, only spans one pixel
-               int x = (int) x_top;
-               height = (sy1 - sy0) * e->direction;
-               STBTT_assert(x >= 0 && x < len);
-               scanline[x]      += stbtt__position_trapezoid_area(height, x_top, x+1.0f, x_bottom, x+1.0f);
-               scanline_fill[x] += height; // everything right of this pixel is filled
-            } else {
-               int x,x1,x2;
-               float y_crossing, y_final, step, sign, area;
-               // covers 2+ pixels
-               if (x_top > x_bottom) {
-                  // flip scanline vertically; signed area is the same
-                  float t;
-                  sy0 = y_bottom - (sy0 - y_top);
-                  sy1 = y_bottom - (sy1 - y_top);
-                  t = sy0, sy0 = sy1, sy1 = t;
-                  t = x_bottom, x_bottom = x_top, x_top = t;
-                  dx = -dx;
-                  dy = -dy;
-                  t = x0, x0 = xb, xb = t;
-               }
-               STBTT_assert(dy >= 0);
-               STBTT_assert(dx >= 0);
-
-               x1 = (int) x_top;
-               x2 = (int) x_bottom;
-               // compute intersection with y axis at x1+1
-               y_crossing = y_top + dy * (x1+1 - x0);
-
-               // compute intersection with y axis at x2
-               y_final = y_top + dy * (x2 - x0);
-
-               //           x1    x_top                            x2    x_bottom
-               //     y_top  +------|-----+------------+------------+--------|---+------------+
-               //            |            |            |            |            |            |
-               //            |            |            |            |            |            |
-               //       sy0  |      Txxxxx|............|............|............|............|
-               // y_crossing |            *xxxxx.......|............|............|............|
-               //            |            |     xxxxx..|............|............|............|
-               //            |            |     /-   xx*xxxx........|............|............|
-               //            |            | dy <       |    xxxxxx..|............|............|
-               //   y_final  |            |     \-     |          xx*xxx.........|............|
-               //       sy1  |            |            |            |   xxxxxB...|............|
-               //            |            |            |            |            |            |
-               //            |            |            |            |            |            |
-               //  y_bottom  +------------+------------+------------+------------+------------+
-               //
-               // goal is to measure the area covered by '.' in each pixel
-
-               // if x2 is right at the right edge of x1, y_crossing can blow up, github #1057
-               // @TODO: maybe test against sy1 rather than y_bottom?
-               if (y_crossing > y_bottom)
-                  y_crossing = y_bottom;
-
-               sign = e->direction;
-
-               // area of the rectangle covered from sy0..y_crossing
-               area = sign * (y_crossing-sy0);
-
-               // area of the triangle (x_top,sy0), (x1+1,sy0), (x1+1,y_crossing)
-               scanline[x1] += stbtt__sized_triangle_area(area, x1+1 - x_top);
-
-               // check if final y_crossing is blown up; no test case for this
-               if (y_final > y_bottom) {
-                  y_final = y_bottom;
-                  dy = (y_final - y_crossing ) / (x2 - (x1+1)); // if denom=0, y_final = y_crossing, so y_final <= y_bottom
-               }
-
-               // in second pixel, area covered by line segment found in first pixel
-               // is always a rectangle 1 wide * the height of that line segment; this
-               // is exactly what the variable 'area' stores. it also gets a contribution
-               // from the line segment within it. the THIRD pixel will get the first
-               // pixel's rectangle contribution, the second pixel's rectangle contribution,
-               // and its own contribution. the 'own contribution' is the same in every pixel except
-               // the leftmost and rightmost, a trapezoid that slides down in each pixel.
-               // the second pixel's contribution to the third pixel will be the
-               // rectangle 1 wide times the height change in the second pixel, which is dy.
-
-               step = sign * dy * 1; // dy is dy/dx, change in y for every 1 change in x,
-               // which multiplied by 1-pixel-width is how much pixel area changes for each step in x
-               // so the area advances by 'step' every time
-
-               for (x = x1+1; x < x2; ++x) {
-                  scanline[x] += area + step/2; // area of trapezoid is 1*step/2
-                  area += step;
-               }
-               STBTT_assert(STBTT_fabs(area) <= 1.01f); // accumulated error from area += step unless we round step down
-               STBTT_assert(sy1 > y_final-0.01f);
-
-               // area covered in the last pixel is the rectangle from all the pixels to the left,
-               // plus the trapezoid filled by the line segment in this pixel all the way to the right edge
-               scanline[x2] += area + sign * stbtt__position_trapezoid_area(sy1-y_final, (float) x2, x2+1.0f, x_bottom, x2+1.0f);
-
-               // the rest of the line is filled based on the total height of the line segment in this pixel
-               scanline_fill[x2] += sign * (sy1-sy0);
-            }
-         } else {
-            // if edge goes outside of box we're drawing, we require
-            // clipping logic. since this does not match the intended use
-            // of this library, we use a different, very slow brute
-            // force implementation
-            // note though that this does happen some of the time because
-            // x_top and x_bottom can be extrapolated at the top & bottom of
-            // the shape and actually lie outside the bounding box
-            int x;
-            for (x=0; x < len; ++x) {
-               // cases:
-               //
-               // there can be up to two intersections with the pixel. any intersection
-               // with left or right edges can be handled by splitting into two (or three)
-               // regions. intersections with top & bottom do not necessitate case-wise logic.
-               //
-               // the old way of doing this found the intersections with the left & right edges,
-               // then used some simple logic to produce up to three segments in sorted order
-               // from top-to-bottom. however, this had a problem: if an x edge was epsilon
-               // across the x border, then the corresponding y position might not be distinct
-               // from the other y segment, and it might ignored as an empty segment. to avoid
-               // that, we need to explicitly produce segments based on x positions.
-
-               // rename variables to clearly-defined pairs
-               float y0 = y_top;
-               float x1 = (float) (x);
-               float x2 = (float) (x+1);
-               float x3 = xb;
-               float y3 = y_bottom;
-
-               // x = e->x + e->dx * (y-y_top)
-               // (y-y_top) = (x - e->x) / e->dx
-               // y = (x - e->x) / e->dx + y_top
-               float y1 = (x - x0) / dx + y_top;
-               float y2 = (x+1 - x0) / dx + y_top;
-
-               if (x0 < x1 && x3 > x2) {         // three segments descending down-right
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
-                  stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x2,y2);
-                  stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
-               } else if (x3 < x1 && x0 > x2) {  // three segments descending down-left
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
-                  stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x1,y1);
-                  stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
-               } else if (x0 < x1 && x3 > x1) {  // two segments across x, down-right
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
-                  stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
-               } else if (x3 < x1 && x0 > x1) {  // two segments across x, down-left
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x1,y1);
-                  stbtt__handle_clipped_edge(scanline,x,e, x1,y1, x3,y3);
-               } else if (x0 < x2 && x3 > x2) {  // two segments across x+1, down-right
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
-                  stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
-               } else if (x3 < x2 && x0 > x2) {  // two segments across x+1, down-left
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x2,y2);
-                  stbtt__handle_clipped_edge(scanline,x,e, x2,y2, x3,y3);
-               } else {  // one segment
-                  stbtt__handle_clipped_edge(scanline,x,e, x0,y0, x3,y3);
-               }
-            }
-         }
-      }
-      e = e->next;
-   }
-}
-
-// directly AA rasterize edges w/o supersampling
-static void stbtt__rasterize_sorted_edges(stbtt__bitmap *result, stbtt__edge *e, int n, int vsubsample, int off_x, int off_y, void *userdata)
-{
-   stbtt__hheap hh = { 0, 0, 0 };
-   stbtt__active_edge *active = NULL;
-   int y,j=0, i;
-   float scanline_data[129], *scanline, *scanline2;
-
-   STBTT__NOTUSED(vsubsample);
-
-   if (result->w > 64)
-      scanline = (float *) STBTT_malloc((result->w*2+1) * sizeof(float), userdata);
-   else
-      scanline = scanline_data;
-
-   scanline2 = scanline + result->w;
-
-   y = off_y;
-   e[n].y0 = (float) (off_y + result->h) + 1;
-
-   while (j < result->h) {
-      // find center of pixel for this scanline
-      float scan_y_top    = y + 0.0f;
-      float scan_y_bottom = y + 1.0f;
-      stbtt__active_edge **step = &active;
-
-      STBTT_memset(scanline , 0, result->w*sizeof(scanline[0]));
-      STBTT_memset(scanline2, 0, (result->w+1)*sizeof(scanline[0]));
-
-      // update all active edges;
-      // remove all active edges that terminate before the top of this scanline
-      while (*step) {
-         stbtt__active_edge * z = *step;
-         if (z->ey <= scan_y_top) {
-            *step = z->next; // delete from list
-            STBTT_assert(z->direction);
-            z->direction = 0;
-            stbtt__hheap_free(&hh, z);
-         } else {
-            step = &((*step)->next); // advance through list
-         }
-      }
-
-      // insert all edges that start before the bottom of this scanline
-      while (e->y0 <= scan_y_bottom) {
-         if (e->y0 != e->y1) {
-            stbtt__active_edge *z = stbtt__new_active(&hh, e, off_x, scan_y_top, userdata);
-            if (z != NULL) {
-               if (j == 0 && off_y != 0) {
-                  if (z->ey < scan_y_top) {
-                     // this can happen due to subpixel positioning and some kind of fp rounding error i think
-                     z->ey = scan_y_top;
-                  }
-               }
-               STBTT_assert(z->ey >= scan_y_top); // if we get really unlucky a tiny bit of an edge can be out of bounds
-               // insert at front
-               z->next = active;
-               active = z;
-            }
-         }
-         ++e;
-      }
-
-      // now process all active edges
-      if (active)
-         stbtt__fill_active_edges_new(scanline, scanline2+1, result->w, active, scan_y_top);
-
-      {
-         float sum = 0;
-         for (i=0; i < result->w; ++i) {
-            float k;
-            int m;
-            sum += scanline2[i];
-            k = scanline[i] + sum;
-            k = (float) STBTT_fabs(k)*255 + 0.5f;
-            m = (int) k;
-            if (m > 255) m = 255;
-            result->pixels[j*result->stride + i] = (unsigned char) m;
-         }
-      }
-      // advance all the edges
-      step = &active;
-      while (*step) {
-         stbtt__active_edge *z = *step;
-         z->fx += z->fdx; // advance to position for current scanline
-         step = &((*step)->next); // advance through list
-      }
-
-      ++y;
-      ++j;
-   }
-
-   stbtt__hheap_cleanup(&hh, userdata);
-
-   if (scanline != scanline_data)
-      STBTT_free(scanline, userdata);
-}
-#else
-#error "Unrecognized value of STBTT_RASTERIZER_VERSION"
-#endif
-
-#define STBTT__COMPARE(a,b)  ((a)->y0 < (b)->y0)
-
-static void stbtt__sort_edges_ins_sort(stbtt__edge *p, int n)
-{
-   int i,j;
-   for (i=1; i < n; ++i) {
-      stbtt__edge t = p[i], *a = &t;
-      j = i;
-      while (j > 0) {
-         stbtt__edge *b = &p[j-1];
-         int c = STBTT__COMPARE(a,b);
-         if (!c) break;
-         p[j] = p[j-1];
-         --j;
-      }
-      if (i != j)
-         p[j] = t;
-   }
-}
-
-static void stbtt__sort_edges_quicksort(stbtt__edge *p, int n)
-{
-   /* threshold for transitioning to insertion sort */
-   while (n > 12) {
-      stbtt__edge t;
-      int c01,c12,c,m,i,j;
-
-      /* compute median of three */
-      m = n >> 1;
-      c01 = STBTT__COMPARE(&p[0],&p[m]);
-      c12 = STBTT__COMPARE(&p[m],&p[n-1]);
-      /* if 0 >= mid >= end, or 0 < mid < end, then use mid */
-      if (c01 != c12) {
-         /* otherwise, we'll need to swap something else to middle */
-         int z;
-         c = STBTT__COMPARE(&p[0],&p[n-1]);
-         /* 0>mid && mid<n:  0>n => n; 0<n => 0 */
-         /* 0<mid && mid>n:  0>n => 0; 0<n => n */
-         z = (c == c12) ? 0 : n-1;
-         t = p[z];
-         p[z] = p[m];
-         p[m] = t;
-      }
-      /* now p[m] is the median-of-three */
-      /* swap it to the beginning so it won't move around */
-      t = p[0];
-      p[0] = p[m];
-      p[m] = t;
-
-      /* partition loop */
-      i=1;
-      j=n-1;
-      for(;;) {
-         /* handling of equality is crucial here */
-         /* for sentinels & efficiency with duplicates */
-         for (;;++i) {
-            if (!STBTT__COMPARE(&p[i], &p[0])) break;
-         }
-         for (;;--j) {
-            if (!STBTT__COMPARE(&p[0], &p[j])) break;
-         }
-         /* make sure we haven't crossed */
-         if (i >= j) break;
-         t = p[i];
-         p[i] = p[j];
-         p[j] = t;
-
-         ++i;
-         --j;
-      }
-      /* recurse on smaller side, iterate on larger */
-      if (j < (n-i)) {
-         stbtt__sort_edges_quicksort(p,j);
-         p = p+i;
-         n = n-i;
-      } else {
-         stbtt__sort_edges_quicksort(p+i, n-i);
-         n = j;
-      }
-   }
-}
-
-static void stbtt__sort_edges(stbtt__edge *p, int n)
-{
-   stbtt__sort_edges_quicksort(p, n);
-   stbtt__sort_edges_ins_sort(p, n);
-}
-
-typedef struct
-{
-   float x,y;
-} stbtt__point;
-
-static void stbtt__rasterize(stbtt__bitmap *result, stbtt__point *pts, int *wcount, int windings, float scale_x, float scale_y, float shift_x, float shift_y, int off_x, int off_y, int invert, void *userdata)
-{
-   float y_scale_inv = invert ? -scale_y : scale_y;
-   stbtt__edge *e;
-   int n,i,j,k,m;
-#if STBTT_RASTERIZER_VERSION == 1
-   int vsubsample = result->h < 8 ? 15 : 5;
-#elif STBTT_RASTERIZER_VERSION == 2
-   int vsubsample = 1;
-#else
-   #error "Unrecognized value of STBTT_RASTERIZER_VERSION"
-#endif
-   // vsubsample should divide 255 evenly; otherwise we won't reach full opacity
-
-   // now we have to blow out the windings into explicit edge lists
-   n = 0;
-   for (i=0; i < windings; ++i)
-      n += wcount[i];
-
-   e = (stbtt__edge *) STBTT_malloc(sizeof(*e) * (n+1), userdata); // add an extra one as a sentinel
-   if (e == 0) return;
-   n = 0;
-
-   m=0;
-   for (i=0; i < windings; ++i) {
-      stbtt__point *p = pts + m;
-      m += wcount[i];
-      j = wcount[i]-1;
-      for (k=0; k < wcount[i]; j=k++) {
-         int a=k,b=j;
-         // skip the edge if horizontal
-         if (p[j].y == p[k].y)
-            continue;
-         // add edge from j to k to the list
-         e[n].invert = 0;
-         if (invert ? p[j].y > p[k].y : p[j].y < p[k].y) {
-            e[n].invert = 1;
-            a=j,b=k;
-         }
-         e[n].x0 = p[a].x * scale_x + shift_x;
-         e[n].y0 = (p[a].y * y_scale_inv + shift_y) * vsubsample;
-         e[n].x1 = p[b].x * scale_x + shift_x;
-         e[n].y1 = (p[b].y * y_scale_inv + shift_y) * vsubsample;
-         ++n;
-      }
-   }
-
-   // now sort the edges by their highest point (should snap to integer, and then by x)
-   //STBTT_sort(e, n, sizeof(e[0]), stbtt__edge_compare);
-   stbtt__sort_edges(e, n);
-
-   // now, traverse the scanlines and find the intersections on each scanline, use xor winding rule
-   stbtt__rasterize_sorted_edges(result, e, n, vsubsample, off_x, off_y, userdata);
-
-   STBTT_free(e, userdata);
-}
-
-static void stbtt__add_point(stbtt__point *points, int n, float x, float y)
-{
-   if (!points) return; // during first pass, it's unallocated
-   points[n].x = x;
-   points[n].y = y;
-}
-
-// tessellate until threshold p is happy... @TODO warped to compensate for non-linear stretching
-static int stbtt__tesselate_curve(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float objspace_flatness_squared, int n)
-{
-   // midpoint
-   float mx = (x0 + 2*x1 + x2)/4;
-   float my = (y0 + 2*y1 + y2)/4;
-   // versus directly drawn line
-   float dx = (x0+x2)/2 - mx;
-   float dy = (y0+y2)/2 - my;
-   if (n > 16) // 65536 segments on one curve better be enough!
-      return 1;
-   if (dx*dx+dy*dy > objspace_flatness_squared) { // half-pixel error allowed... need to be smaller if AA
-      stbtt__tesselate_curve(points, num_points, x0,y0, (x0+x1)/2.0f,(y0+y1)/2.0f, mx,my, objspace_flatness_squared,n+1);
-      stbtt__tesselate_curve(points, num_points, mx,my, (x1+x2)/2.0f,(y1+y2)/2.0f, x2,y2, objspace_flatness_squared,n+1);
-   } else {
-      stbtt__add_point(points, *num_points,x2,y2);
-      *num_points = *num_points+1;
-   }
-   return 1;
-}
-
-static void stbtt__tesselate_cubic(stbtt__point *points, int *num_points, float x0, float y0, float x1, float y1, float x2, float y2, float x3, float y3, float objspace_flatness_squared, int n)
-{
-   // @TODO this "flatness" calculation is just made-up nonsense that seems to work well enough
-   float dx0 = x1-x0;
-   float dy0 = y1-y0;
-   float dx1 = x2-x1;
-   float dy1 = y2-y1;
-   float dx2 = x3-x2;
-   float dy2 = y3-y2;
-   float dx = x3-x0;
-   float dy = y3-y0;
-   float longlen = (float) (STBTT_sqrt(dx0*dx0+dy0*dy0)+STBTT_sqrt(dx1*dx1+dy1*dy1)+STBTT_sqrt(dx2*dx2+dy2*dy2));
-   float shortlen = (float) STBTT_sqrt(dx*dx+dy*dy);
-   float flatness_squared = longlen*longlen-shortlen*shortlen;
-
-   if (n > 16) // 65536 segments on one curve better be enough!
-      return;
-
-   if (flatness_squared > objspace_flatness_squared) {
-      float x01 = (x0+x1)/2;
-      float y01 = (y0+y1)/2;
-      float x12 = (x1+x2)/2;
-      float y12 = (y1+y2)/2;
-      float x23 = (x2+x3)/2;
-      float y23 = (y2+y3)/2;
-
-      float xa = (x01+x12)/2;
-      float ya = (y01+y12)/2;
-      float xb = (x12+x23)/2;
-      float yb = (y12+y23)/2;
-
-      float mx = (xa+xb)/2;
-      float my = (ya+yb)/2;
-
-      stbtt__tesselate_cubic(points, num_points, x0,y0, x01,y01, xa,ya, mx,my, objspace_flatness_squared,n+1);
-      stbtt__tesselate_cubic(points, num_points, mx,my, xb,yb, x23,y23, x3,y3, objspace_flatness_squared,n+1);
-   } else {
-      stbtt__add_point(points, *num_points,x3,y3);
-      *num_points = *num_points+1;
-   }
-}
-
-// returns number of contours
-static stbtt__point *stbtt_FlattenCurves(stbtt_vertex *vertices, int num_verts, float objspace_flatness, int **contour_lengths, int *num_contours, void *userdata)
-{
-   stbtt__point *points=0;
-   int num_points=0;
-
-   float objspace_flatness_squared = objspace_flatness * objspace_flatness;
-   int i,n=0,start=0, pass;
-
-   // count how many "moves" there are to get the contour count
-   for (i=0; i < num_verts; ++i)
-      if (vertices[i].type == STBTT_vmove)
-         ++n;
-
-   *num_contours = n;
-   if (n == 0) return 0;
-
-   *contour_lengths = (int *) STBTT_malloc(sizeof(**contour_lengths) * n, userdata);
-
-   if (*contour_lengths == 0) {
-      *num_contours = 0;
-      return 0;
-   }
-
-   // make two passes through the points so we don't need to realloc
-   for (pass=0; pass < 2; ++pass) {
-      float x=0,y=0;
-      if (pass == 1) {
-         points = (stbtt__point *) STBTT_malloc(num_points * sizeof(points[0]), userdata);
-         if (points == NULL) goto error;
-      }
-      num_points = 0;
-      n= -1;
-      for (i=0; i < num_verts; ++i) {
-         switch (vertices[i].type) {
-            case STBTT_vmove:
-               // start the next contour
-               if (n >= 0)
-                  (*contour_lengths)[n] = num_points - start;
-               ++n;
-               start = num_points;
-
-               x = vertices[i].x, y = vertices[i].y;
-               stbtt__add_point(points, num_points++, x,y);
-               break;
-            case STBTT_vline:
-               x = vertices[i].x, y = vertices[i].y;
-               stbtt__add_point(points, num_points++, x, y);
-               break;
-            case STBTT_vcurve:
-               stbtt__tesselate_curve(points, &num_points, x,y,
-                                        vertices[i].cx, vertices[i].cy,
-                                        vertices[i].x,  vertices[i].y,
-                                        objspace_flatness_squared, 0);
-               x = vertices[i].x, y = vertices[i].y;
-               break;
-            case STBTT_vcubic:
-               stbtt__tesselate_cubic(points, &num_points, x,y,
-                                        vertices[i].cx, vertices[i].cy,
-                                        vertices[i].cx1, vertices[i].cy1,
-                                        vertices[i].x,  vertices[i].y,
-                                        objspace_flatness_squared, 0);
-               x = vertices[i].x, y = vertices[i].y;
-               break;
-         }
-      }
-      (*contour_lengths)[n] = num_points - start;
-   }
-
-   return points;
-error:
-   STBTT_free(points, userdata);
-   STBTT_free(*contour_lengths, userdata);
-   *contour_lengths = 0;
-   *num_contours = 0;
-   return NULL;
-}
-
-STBTT_DEF void stbtt_Rasterize(stbtt__bitmap *result, float flatness_in_pixels, stbtt_vertex *vertices, int num_verts, float scale_x, float scale_y, float shift_x, float shift_y, int x_off, int y_off, int invert, void *userdata)
-{
-   float scale            = scale_x > scale_y ? scale_y : scale_x;
-   int winding_count      = 0;
-   int *winding_lengths   = NULL;
-   stbtt__point *windings = stbtt_FlattenCurves(vertices, num_verts, flatness_in_pixels / scale, &winding_lengths, &winding_count, userdata);
-   if (windings) {
-      stbtt__rasterize(result, windings, winding_lengths, winding_count, scale_x, scale_y, shift_x, shift_y, x_off, y_off, invert, userdata);
-      STBTT_free(winding_lengths, userdata);
-      STBTT_free(windings, userdata);
-   }
-}
-
-STBTT_DEF void stbtt_FreeBitmap(unsigned char *bitmap, void *userdata)
-{
-   STBTT_free(bitmap, userdata);
-}
-
-STBTT_DEF unsigned char *stbtt_GetGlyphBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int glyph, int *width, int *height, int *xoff, int *yoff)
-{
-   int ix0,iy0,ix1,iy1;
-   stbtt__bitmap gbm;
-   stbtt_vertex *vertices;
-   int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
-
-   if (scale_x == 0) scale_x = scale_y;
-   if (scale_y == 0) {
-      if (scale_x == 0) {
-         STBTT_free(vertices, info->userdata);
-         return NULL;
-      }
-      scale_y = scale_x;
-   }
-
-   stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,&ix1,&iy1);
-
-   // now we get the size
-   gbm.w = (ix1 - ix0);
-   gbm.h = (iy1 - iy0);
-   gbm.pixels = NULL; // in case we error
-
-   if (width ) *width  = gbm.w;
-   if (height) *height = gbm.h;
-   if (xoff  ) *xoff   = ix0;
-   if (yoff  ) *yoff   = iy0;
-
-   if (gbm.w && gbm.h) {
-      gbm.pixels = (unsigned char *) STBTT_malloc(gbm.w * gbm.h, info->userdata);
-      if (gbm.pixels) {
-         gbm.stride = gbm.w;
-
-         stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0, iy0, 1, info->userdata);
-      }
-   }
-   STBTT_free(vertices, info->userdata);
-   return gbm.pixels;
-}
-
-STBTT_DEF unsigned char *stbtt_GetGlyphBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int glyph, int *width, int *height, int *xoff, int *yoff)
-{
-   return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y, 0.0f, 0.0f, glyph, width, height, xoff, yoff);
-}
-
-STBTT_DEF void stbtt_MakeGlyphBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int glyph)
-{
-   int ix0,iy0;
-   stbtt_vertex *vertices;
-   int num_verts = stbtt_GetGlyphShape(info, glyph, &vertices);
-   stbtt__bitmap gbm;
-
-   stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale_x, scale_y, shift_x, shift_y, &ix0,&iy0,0,0);
-   gbm.pixels = output;
-   gbm.w = out_w;
-   gbm.h = out_h;
-   gbm.stride = out_stride;
-
-   if (gbm.w && gbm.h)
-      stbtt_Rasterize(&gbm, 0.35f, vertices, num_verts, scale_x, scale_y, shift_x, shift_y, ix0,iy0, 1, info->userdata);
-
-   STBTT_free(vertices, info->userdata);
-}
-
-STBTT_DEF void stbtt_MakeGlyphBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int glyph)
-{
-   stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, glyph);
-}
-
-STBTT_DEF unsigned char *stbtt_GetCodepointBitmapSubpixel(const stbtt_fontinfo *info, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
-{
-   return stbtt_GetGlyphBitmapSubpixel(info, scale_x, scale_y,shift_x,shift_y, stbtt_FindGlyphIndex(info,codepoint), width,height,xoff,yoff);
-}
-
-STBTT_DEF void stbtt_MakeCodepointBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int oversample_x, int oversample_y, float *sub_x, float *sub_y, int codepoint)
-{
-   stbtt_MakeGlyphBitmapSubpixelPrefilter(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, oversample_x, oversample_y, sub_x, sub_y, stbtt_FindGlyphIndex(info,codepoint));
-}
-
-STBTT_DEF void stbtt_MakeCodepointBitmapSubpixel(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int codepoint)
-{
-   stbtt_MakeGlyphBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, shift_x, shift_y, stbtt_FindGlyphIndex(info,codepoint));
-}
-
-STBTT_DEF unsigned char *stbtt_GetCodepointBitmap(const stbtt_fontinfo *info, float scale_x, float scale_y, int codepoint, int *width, int *height, int *xoff, int *yoff)
-{
-   return stbtt_GetCodepointBitmapSubpixel(info, scale_x, scale_y, 0.0f,0.0f, codepoint, width,height,xoff,yoff);
-}
-
-STBTT_DEF void stbtt_MakeCodepointBitmap(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, int codepoint)
-{
-   stbtt_MakeCodepointBitmapSubpixel(info, output, out_w, out_h, out_stride, scale_x, scale_y, 0.0f,0.0f, codepoint);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// bitmap baking
-//
-// This is SUPER-CRAPPY packing to keep source code small
-
-static int stbtt_BakeFontBitmap_internal(unsigned char *data, int offset,  // font location (use offset=0 for plain .ttf)
-                                float pixel_height,                     // height of font in pixels
-                                unsigned char *pixels, int pw, int ph,  // bitmap to be filled in
-                                int first_char, int num_chars,          // characters to bake
-                                stbtt_bakedchar *chardata)
-{
-   float scale;
-   int x,y,bottom_y, i;
-   stbtt_fontinfo f;
-   f.userdata = NULL;
-   if (!stbtt_InitFont(&f, data, offset))
-      return -1;
-   STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
-   x=y=1;
-   bottom_y = 1;
-
-   scale = stbtt_ScaleForPixelHeight(&f, pixel_height);
-
-   for (i=0; i < num_chars; ++i) {
-      int advance, lsb, x0,y0,x1,y1,gw,gh;
-      int g = stbtt_FindGlyphIndex(&f, first_char + i);
-      stbtt_GetGlyphHMetrics(&f, g, &advance, &lsb);
-      stbtt_GetGlyphBitmapBox(&f, g, scale,scale, &x0,&y0,&x1,&y1);
-      gw = x1-x0;
-      gh = y1-y0;
-      if (x + gw + 1 >= pw)
-         y = bottom_y, x = 1; // advance to next row
-      if (y + gh + 1 >= ph) // check if it fits vertically AFTER potentially moving to next row
-         return -i;
-      STBTT_assert(x+gw < pw);
-      STBTT_assert(y+gh < ph);
-      stbtt_MakeGlyphBitmap(&f, pixels+x+y*pw, gw,gh,pw, scale,scale, g);
-      chardata[i].x0 = (stbtt_int16) x;
-      chardata[i].y0 = (stbtt_int16) y;
-      chardata[i].x1 = (stbtt_int16) (x + gw);
-      chardata[i].y1 = (stbtt_int16) (y + gh);
-      chardata[i].xadvance = scale * advance;
-      chardata[i].xoff     = (float) x0;
-      chardata[i].yoff     = (float) y0;
-      x = x + gw + 1;
-      if (y+gh+1 > bottom_y)
-         bottom_y = y+gh+1;
-   }
-   return bottom_y;
-}
-
-STBTT_DEF void stbtt_GetBakedQuad(const stbtt_bakedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int opengl_fillrule)
-{
-   float d3d_bias = opengl_fillrule ? 0 : -0.5f;
-   float ipw = 1.0f / pw, iph = 1.0f / ph;
-   const stbtt_bakedchar *b = chardata + char_index;
-   int round_x = STBTT_ifloor((*xpos + b->xoff) + 0.5f);
-   int round_y = STBTT_ifloor((*ypos + b->yoff) + 0.5f);
-
-   q->x0 = round_x + d3d_bias;
-   q->y0 = round_y + d3d_bias;
-   q->x1 = round_x + b->x1 - b->x0 + d3d_bias;
-   q->y1 = round_y + b->y1 - b->y0 + d3d_bias;
-
-   q->s0 = b->x0 * ipw;
-   q->t0 = b->y0 * iph;
-   q->s1 = b->x1 * ipw;
-   q->t1 = b->y1 * iph;
-
-   *xpos += b->xadvance;
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// rectangle packing replacement routines if you don't have stb_rect_pack.h
-//
-
-#ifndef STB_RECT_PACK_VERSION
-
-typedef int stbrp_coord;
-
-////////////////////////////////////////////////////////////////////////////////////
-//                                                                                //
-//                                                                                //
-// COMPILER WARNING ?!?!?                                                         //
-//                                                                                //
-//                                                                                //
-// if you get a compile warning due to these symbols being defined more than      //
-// once, move #include "stb_rect_pack.h" before #include "stb_truetype.h"         //
-//                                                                                //
-////////////////////////////////////////////////////////////////////////////////////
-
-typedef struct
-{
-   int width,height;
-   int x,y,bottom_y;
-} stbrp_context;
-
-typedef struct
-{
-   unsigned char x;
-} stbrp_node;
-
-struct stbrp_rect
-{
-   stbrp_coord x,y;
-   int id,w,h,was_packed;
-};
-
-static void stbrp_init_target(stbrp_context *con, int pw, int ph, stbrp_node *nodes, int num_nodes)
-{
-   con->width  = pw;
-   con->height = ph;
-   con->x = 0;
-   con->y = 0;
-   con->bottom_y = 0;
-   STBTT__NOTUSED(nodes);
-   STBTT__NOTUSED(num_nodes);
-}
-
-static void stbrp_pack_rects(stbrp_context *con, stbrp_rect *rects, int num_rects)
-{
-   int i;
-   for (i=0; i < num_rects; ++i) {
-      if (con->x + rects[i].w > con->width) {
-         con->x = 0;
-         con->y = con->bottom_y;
-      }
-      if (con->y + rects[i].h > con->height)
-         break;
-      rects[i].x = con->x;
-      rects[i].y = con->y;
-      rects[i].was_packed = 1;
-      con->x += rects[i].w;
-      if (con->y + rects[i].h > con->bottom_y)
-         con->bottom_y = con->y + rects[i].h;
-   }
-   for (   ; i < num_rects; ++i)
-      rects[i].was_packed = 0;
-}
-#endif
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// bitmap baking
-//
-// This is SUPER-AWESOME (tm Ryan Gordon) packing using stb_rect_pack.h. If
-// stb_rect_pack.h isn't available, it uses the BakeFontBitmap strategy.
-
-STBTT_DEF int stbtt_PackBegin(stbtt_pack_context *spc, unsigned char *pixels, int pw, int ph, int stride_in_bytes, int padding, void *alloc_context)
-{
-   stbrp_context *context = (stbrp_context *) STBTT_malloc(sizeof(*context)            ,alloc_context);
-   int            num_nodes = pw - padding;
-   stbrp_node    *nodes   = (stbrp_node    *) STBTT_malloc(sizeof(*nodes  ) * num_nodes,alloc_context);
-
-   if (context == NULL || nodes == NULL) {
-      if (context != NULL) STBTT_free(context, alloc_context);
-      if (nodes   != NULL) STBTT_free(nodes  , alloc_context);
-      return 0;
-   }
-
-   spc->user_allocator_context = alloc_context;
-   spc->width = pw;
-   spc->height = ph;
-   spc->pixels = pixels;
-   spc->pack_info = context;
-   spc->nodes = nodes;
-   spc->padding = padding;
-   spc->stride_in_bytes = stride_in_bytes != 0 ? stride_in_bytes : pw;
-   spc->h_oversample = 1;
-   spc->v_oversample = 1;
-   spc->skip_missing = 0;
-
-   stbrp_init_target(context, pw-padding, ph-padding, nodes, num_nodes);
-
-   if (pixels)
-      STBTT_memset(pixels, 0, pw*ph); // background of 0 around pixels
-
-   return 1;
-}
-
-STBTT_DEF void stbtt_PackEnd  (stbtt_pack_context *spc)
-{
-   STBTT_free(spc->nodes    , spc->user_allocator_context);
-   STBTT_free(spc->pack_info, spc->user_allocator_context);
-}
-
-STBTT_DEF void stbtt_PackSetOversampling(stbtt_pack_context *spc, unsigned int h_oversample, unsigned int v_oversample)
-{
-   STBTT_assert(h_oversample <= STBTT_MAX_OVERSAMPLE);
-   STBTT_assert(v_oversample <= STBTT_MAX_OVERSAMPLE);
-   if (h_oversample <= STBTT_MAX_OVERSAMPLE)
-      spc->h_oversample = h_oversample;
-   if (v_oversample <= STBTT_MAX_OVERSAMPLE)
-      spc->v_oversample = v_oversample;
-}
-
-STBTT_DEF void stbtt_PackSetSkipMissingCodepoints(stbtt_pack_context *spc, int skip)
-{
-   spc->skip_missing = skip;
-}
-
-#define STBTT__OVER_MASK  (STBTT_MAX_OVERSAMPLE-1)
-
-static void stbtt__h_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
-{
-   unsigned char buffer[STBTT_MAX_OVERSAMPLE];
-   int safe_w = w - kernel_width;
-   int j;
-   STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze
-   for (j=0; j < h; ++j) {
-      int i;
-      unsigned int total;
-      STBTT_memset(buffer, 0, kernel_width);
-
-      total = 0;
-
-      // make kernel_width a constant in common cases so compiler can optimize out the divide
-      switch (kernel_width) {
-         case 2:
-            for (i=0; i <= safe_w; ++i) {
-               total += pixels[i] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
-               pixels[i] = (unsigned char) (total / 2);
-            }
-            break;
-         case 3:
-            for (i=0; i <= safe_w; ++i) {
-               total += pixels[i] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
-               pixels[i] = (unsigned char) (total / 3);
-            }
-            break;
-         case 4:
-            for (i=0; i <= safe_w; ++i) {
-               total += pixels[i] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
-               pixels[i] = (unsigned char) (total / 4);
-            }
-            break;
-         case 5:
-            for (i=0; i <= safe_w; ++i) {
-               total += pixels[i] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
-               pixels[i] = (unsigned char) (total / 5);
-            }
-            break;
-         default:
-            for (i=0; i <= safe_w; ++i) {
-               total += pixels[i] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i];
-               pixels[i] = (unsigned char) (total / kernel_width);
-            }
-            break;
-      }
-
-      for (; i < w; ++i) {
-         STBTT_assert(pixels[i] == 0);
-         total -= buffer[i & STBTT__OVER_MASK];
-         pixels[i] = (unsigned char) (total / kernel_width);
-      }
-
-      pixels += stride_in_bytes;
-   }
-}
-
-static void stbtt__v_prefilter(unsigned char *pixels, int w, int h, int stride_in_bytes, unsigned int kernel_width)
-{
-   unsigned char buffer[STBTT_MAX_OVERSAMPLE];
-   int safe_h = h - kernel_width;
-   int j;
-   STBTT_memset(buffer, 0, STBTT_MAX_OVERSAMPLE); // suppress bogus warning from VS2013 -analyze
-   for (j=0; j < w; ++j) {
-      int i;
-      unsigned int total;
-      STBTT_memset(buffer, 0, kernel_width);
-
-      total = 0;
-
-      // make kernel_width a constant in common cases so compiler can optimize out the divide
-      switch (kernel_width) {
-         case 2:
-            for (i=0; i <= safe_h; ++i) {
-               total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
-               pixels[i*stride_in_bytes] = (unsigned char) (total / 2);
-            }
-            break;
-         case 3:
-            for (i=0; i <= safe_h; ++i) {
-               total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
-               pixels[i*stride_in_bytes] = (unsigned char) (total / 3);
-            }
-            break;
-         case 4:
-            for (i=0; i <= safe_h; ++i) {
-               total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
-               pixels[i*stride_in_bytes] = (unsigned char) (total / 4);
-            }
-            break;
-         case 5:
-            for (i=0; i <= safe_h; ++i) {
-               total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
-               pixels[i*stride_in_bytes] = (unsigned char) (total / 5);
-            }
-            break;
-         default:
-            for (i=0; i <= safe_h; ++i) {
-               total += pixels[i*stride_in_bytes] - buffer[i & STBTT__OVER_MASK];
-               buffer[(i+kernel_width) & STBTT__OVER_MASK] = pixels[i*stride_in_bytes];
-               pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
-            }
-            break;
-      }
-
-      for (; i < h; ++i) {
-         STBTT_assert(pixels[i*stride_in_bytes] == 0);
-         total -= buffer[i & STBTT__OVER_MASK];
-         pixels[i*stride_in_bytes] = (unsigned char) (total / kernel_width);
-      }
-
-      pixels += 1;
-   }
-}
-
-static float stbtt__oversample_shift(int oversample)
-{
-   if (!oversample)
-      return 0.0f;
-
-   // The prefilter is a box filter of width "oversample",
-   // which shifts phase by (oversample - 1)/2 pixels in
-   // oversampled space. We want to shift in the opposite
-   // direction to counter this.
-   return (float)-(oversample - 1) / (2.0f * (float)oversample);
-}
-
-// rects array must be big enough to accommodate all characters in the given ranges
-STBTT_DEF int stbtt_PackFontRangesGatherRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
-{
-   int i,j,k;
-   int missing_glyph_added = 0;
-
-   k=0;
-   for (i=0; i < num_ranges; ++i) {
-      float fh = ranges[i].font_size;
-      float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
-      ranges[i].h_oversample = (unsigned char) spc->h_oversample;
-      ranges[i].v_oversample = (unsigned char) spc->v_oversample;
-      for (j=0; j < ranges[i].num_chars; ++j) {
-         int x0,y0,x1,y1;
-         int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
-         int glyph = stbtt_FindGlyphIndex(info, codepoint);
-         if (glyph == 0 && (spc->skip_missing || missing_glyph_added)) {
-            rects[k].w = rects[k].h = 0;
-         } else {
-            stbtt_GetGlyphBitmapBoxSubpixel(info,glyph,
-                                            scale * spc->h_oversample,
-                                            scale * spc->v_oversample,
-                                            0,0,
-                                            &x0,&y0,&x1,&y1);
-            rects[k].w = (stbrp_coord) (x1-x0 + spc->padding + spc->h_oversample-1);
-            rects[k].h = (stbrp_coord) (y1-y0 + spc->padding + spc->v_oversample-1);
-            if (glyph == 0)
-               missing_glyph_added = 1;
-         }
-         ++k;
-      }
-   }
-
-   return k;
-}
-
-STBTT_DEF void stbtt_MakeGlyphBitmapSubpixelPrefilter(const stbtt_fontinfo *info, unsigned char *output, int out_w, int out_h, int out_stride, float scale_x, float scale_y, float shift_x, float shift_y, int prefilter_x, int prefilter_y, float *sub_x, float *sub_y, int glyph)
-{
-   stbtt_MakeGlyphBitmapSubpixel(info,
-                                 output,
-                                 out_w - (prefilter_x - 1),
-                                 out_h - (prefilter_y - 1),
-                                 out_stride,
-                                 scale_x,
-                                 scale_y,
-                                 shift_x,
-                                 shift_y,
-                                 glyph);
-
-   if (prefilter_x > 1)
-      stbtt__h_prefilter(output, out_w, out_h, out_stride, prefilter_x);
-
-   if (prefilter_y > 1)
-      stbtt__v_prefilter(output, out_w, out_h, out_stride, prefilter_y);
-
-   *sub_x = stbtt__oversample_shift(prefilter_x);
-   *sub_y = stbtt__oversample_shift(prefilter_y);
-}
-
-// rects array must be big enough to accommodate all characters in the given ranges
-STBTT_DEF int stbtt_PackFontRangesRenderIntoRects(stbtt_pack_context *spc, const stbtt_fontinfo *info, stbtt_pack_range *ranges, int num_ranges, stbrp_rect *rects)
-{
-   int i,j,k, missing_glyph = -1, return_value = 1;
-
-   // save current values
-   int old_h_over = spc->h_oversample;
-   int old_v_over = spc->v_oversample;
-
-   k = 0;
-   for (i=0; i < num_ranges; ++i) {
-      float fh = ranges[i].font_size;
-      float scale = fh > 0 ? stbtt_ScaleForPixelHeight(info, fh) : stbtt_ScaleForMappingEmToPixels(info, -fh);
-      float recip_h,recip_v,sub_x,sub_y;
-      spc->h_oversample = ranges[i].h_oversample;
-      spc->v_oversample = ranges[i].v_oversample;
-      recip_h = 1.0f / spc->h_oversample;
-      recip_v = 1.0f / spc->v_oversample;
-      sub_x = stbtt__oversample_shift(spc->h_oversample);
-      sub_y = stbtt__oversample_shift(spc->v_oversample);
-      for (j=0; j < ranges[i].num_chars; ++j) {
-         stbrp_rect *r = &rects[k];
-         if (r->was_packed && r->w != 0 && r->h != 0) {
-            stbtt_packedchar *bc = &ranges[i].chardata_for_range[j];
-            int advance, lsb, x0,y0,x1,y1;
-            int codepoint = ranges[i].array_of_unicode_codepoints == NULL ? ranges[i].first_unicode_codepoint_in_range + j : ranges[i].array_of_unicode_codepoints[j];
-            int glyph = stbtt_FindGlyphIndex(info, codepoint);
-            stbrp_coord pad = (stbrp_coord) spc->padding;
-
-            // pad on left and top
-            r->x += pad;
-            r->y += pad;
-            r->w -= pad;
-            r->h -= pad;
-            stbtt_GetGlyphHMetrics(info, glyph, &advance, &lsb);
-            stbtt_GetGlyphBitmapBox(info, glyph,
-                                    scale * spc->h_oversample,
-                                    scale * spc->v_oversample,
-                                    &x0,&y0,&x1,&y1);
-            stbtt_MakeGlyphBitmapSubpixel(info,
-                                          spc->pixels + r->x + r->y*spc->stride_in_bytes,
-                                          r->w - spc->h_oversample+1,
-                                          r->h - spc->v_oversample+1,
-                                          spc->stride_in_bytes,
-                                          scale * spc->h_oversample,
-                                          scale * spc->v_oversample,
-                                          0,0,
-                                          glyph);
-
-            if (spc->h_oversample > 1)
-               stbtt__h_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
-                                  r->w, r->h, spc->stride_in_bytes,
-                                  spc->h_oversample);
-
-            if (spc->v_oversample > 1)
-               stbtt__v_prefilter(spc->pixels + r->x + r->y*spc->stride_in_bytes,
-                                  r->w, r->h, spc->stride_in_bytes,
-                                  spc->v_oversample);
-
-            bc->x0       = (stbtt_int16)  r->x;
-            bc->y0       = (stbtt_int16)  r->y;
-            bc->x1       = (stbtt_int16) (r->x + r->w);
-            bc->y1       = (stbtt_int16) (r->y + r->h);
-            bc->xadvance =                scale * advance;
-            bc->xoff     =       (float)  x0 * recip_h + sub_x;
-            bc->yoff     =       (float)  y0 * recip_v + sub_y;
-            bc->xoff2    =                (x0 + r->w) * recip_h + sub_x;
-            bc->yoff2    =                (y0 + r->h) * recip_v + sub_y;
-
-            if (glyph == 0)
-               missing_glyph = j;
-         } else if (spc->skip_missing) {
-            return_value = 0;
-         } else if (r->was_packed && r->w == 0 && r->h == 0 && missing_glyph >= 0) {
-            ranges[i].chardata_for_range[j] = ranges[i].chardata_for_range[missing_glyph];
-         } else {
-            return_value = 0; // if any fail, report failure
-         }
-
-         ++k;
-      }
-   }
-
-   // restore original values
-   spc->h_oversample = old_h_over;
-   spc->v_oversample = old_v_over;
-
-   return return_value;
-}
-
-STBTT_DEF void stbtt_PackFontRangesPackRects(stbtt_pack_context *spc, stbrp_rect *rects, int num_rects)
-{
-   stbrp_pack_rects((stbrp_context *) spc->pack_info, rects, num_rects);
-}
-
-STBTT_DEF int stbtt_PackFontRanges(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, stbtt_pack_range *ranges, int num_ranges)
-{
-   stbtt_fontinfo info;
-   int i,j,n, return_value = 1;
-   //stbrp_context *context = (stbrp_context *) spc->pack_info;
-   stbrp_rect    *rects;
-
-   // flag all characters as NOT packed
-   for (i=0; i < num_ranges; ++i)
-      for (j=0; j < ranges[i].num_chars; ++j)
-         ranges[i].chardata_for_range[j].x0 =
-         ranges[i].chardata_for_range[j].y0 =
-         ranges[i].chardata_for_range[j].x1 =
-         ranges[i].chardata_for_range[j].y1 = 0;
-
-   n = 0;
-   for (i=0; i < num_ranges; ++i)
-      n += ranges[i].num_chars;
-
-   rects = (stbrp_rect *) STBTT_malloc(sizeof(*rects) * n, spc->user_allocator_context);
-   if (rects == NULL)
-      return 0;
-
-   info.userdata = spc->user_allocator_context;
-   stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata,font_index));
-
-   n = stbtt_PackFontRangesGatherRects(spc, &info, ranges, num_ranges, rects);
-
-   stbtt_PackFontRangesPackRects(spc, rects, n);
-
-   return_value = stbtt_PackFontRangesRenderIntoRects(spc, &info, ranges, num_ranges, rects);
-
-   STBTT_free(rects, spc->user_allocator_context);
-   return return_value;
-}
-
-STBTT_DEF int stbtt_PackFontRange(stbtt_pack_context *spc, const unsigned char *fontdata, int font_index, float font_size,
-            int first_unicode_codepoint_in_range, int num_chars_in_range, stbtt_packedchar *chardata_for_range)
-{
-   stbtt_pack_range range;
-   range.first_unicode_codepoint_in_range = first_unicode_codepoint_in_range;
-   range.array_of_unicode_codepoints = NULL;
-   range.num_chars                   = num_chars_in_range;
-   range.chardata_for_range          = chardata_for_range;
-   range.font_size                   = font_size;
-   return stbtt_PackFontRanges(spc, fontdata, font_index, &range, 1);
-}
-
-STBTT_DEF void stbtt_GetScaledFontVMetrics(const unsigned char *fontdata, int index, float size, float *ascent, float *descent, float *lineGap)
-{
-   int i_ascent, i_descent, i_lineGap;
-   float scale;
-   stbtt_fontinfo info;
-   stbtt_InitFont(&info, fontdata, stbtt_GetFontOffsetForIndex(fontdata, index));
-   scale = size > 0 ? stbtt_ScaleForPixelHeight(&info, size) : stbtt_ScaleForMappingEmToPixels(&info, -size);
-   stbtt_GetFontVMetrics(&info, &i_ascent, &i_descent, &i_lineGap);
-   *ascent  = (float) i_ascent  * scale;
-   *descent = (float) i_descent * scale;
-   *lineGap = (float) i_lineGap * scale;
-}
-
-STBTT_DEF void stbtt_GetPackedQuad(const stbtt_packedchar *chardata, int pw, int ph, int char_index, float *xpos, float *ypos, stbtt_aligned_quad *q, int align_to_integer)
-{
-   float ipw = 1.0f / pw, iph = 1.0f / ph;
-   const stbtt_packedchar *b = chardata + char_index;
-
-   if (align_to_integer) {
-      float x = (float) STBTT_ifloor((*xpos + b->xoff) + 0.5f);
-      float y = (float) STBTT_ifloor((*ypos + b->yoff) + 0.5f);
-      q->x0 = x;
-      q->y0 = y;
-      q->x1 = x + b->xoff2 - b->xoff;
-      q->y1 = y + b->yoff2 - b->yoff;
-   } else {
-      q->x0 = *xpos + b->xoff;
-      q->y0 = *ypos + b->yoff;
-      q->x1 = *xpos + b->xoff2;
-      q->y1 = *ypos + b->yoff2;
-   }
-
-   q->s0 = b->x0 * ipw;
-   q->t0 = b->y0 * iph;
-   q->s1 = b->x1 * ipw;
-   q->t1 = b->y1 * iph;
-
-   *xpos += b->xadvance;
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// sdf computation
-//
-
-#define STBTT_min(a,b)  ((a) < (b) ? (a) : (b))
-#define STBTT_max(a,b)  ((a) < (b) ? (b) : (a))
-
-static int stbtt__ray_intersect_bezier(float orig[2], float ray[2], float q0[2], float q1[2], float q2[2], float hits[2][2])
-{
-   float q0perp = q0[1]*ray[0] - q0[0]*ray[1];
-   float q1perp = q1[1]*ray[0] - q1[0]*ray[1];
-   float q2perp = q2[1]*ray[0] - q2[0]*ray[1];
-   float roperp = orig[1]*ray[0] - orig[0]*ray[1];
-
-   float a = q0perp - 2*q1perp + q2perp;
-   float b = q1perp - q0perp;
-   float c = q0perp - roperp;
-
-   float s0 = 0., s1 = 0.;
-   int num_s = 0;
-
-   if (a != 0.0) {
-      float discr = b*b - a*c;
-      if (discr > 0.0) {
-         float rcpna = -1 / a;
-         float d = (float) STBTT_sqrt(discr);
-         s0 = (b+d) * rcpna;
-         s1 = (b-d) * rcpna;
-         if (s0 >= 0.0 && s0 <= 1.0)
-            num_s = 1;
-         if (d > 0.0 && s1 >= 0.0 && s1 <= 1.0) {
-            if (num_s == 0) s0 = s1;
-            ++num_s;
-         }
-      }
-   } else {
-      // 2*b*s + c = 0
-      // s = -c / (2*b)
-      s0 = c / (-2 * b);
-      if (s0 >= 0.0 && s0 <= 1.0)
-         num_s = 1;
-   }
-
-   if (num_s == 0)
-      return 0;
-   else {
-      float rcp_len2 = 1 / (ray[0]*ray[0] + ray[1]*ray[1]);
-      float rayn_x = ray[0] * rcp_len2, rayn_y = ray[1] * rcp_len2;
-
-      float q0d =   q0[0]*rayn_x +   q0[1]*rayn_y;
-      float q1d =   q1[0]*rayn_x +   q1[1]*rayn_y;
-      float q2d =   q2[0]*rayn_x +   q2[1]*rayn_y;
-      float rod = orig[0]*rayn_x + orig[1]*rayn_y;
-
-      float q10d = q1d - q0d;
-      float q20d = q2d - q0d;
-      float q0rd = q0d - rod;
-
-      hits[0][0] = q0rd + s0*(2.0f - 2.0f*s0)*q10d + s0*s0*q20d;
-      hits[0][1] = a*s0+b;
-
-      if (num_s > 1) {
-         hits[1][0] = q0rd + s1*(2.0f - 2.0f*s1)*q10d + s1*s1*q20d;
-         hits[1][1] = a*s1+b;
-         return 2;
-      } else {
-         return 1;
-      }
-   }
-}
-
-static int equal(float *a, float *b)
-{
-   return (a[0] == b[0] && a[1] == b[1]);
-}
-
-static int stbtt__compute_crossings_x(float x, float y, int nverts, stbtt_vertex *verts)
-{
-   int i;
-   float orig[2], ray[2] = { 1, 0 };
-   float y_frac;
-   int winding = 0;
-
-   // make sure y never passes through a vertex of the shape
-   y_frac = (float) STBTT_fmod(y, 1.0f);
-   if (y_frac < 0.01f)
-      y += 0.01f;
-   else if (y_frac > 0.99f)
-      y -= 0.01f;
-
-   orig[0] = x;
-   orig[1] = y;
-
-   // test a ray from (-infinity,y) to (x,y)
-   for (i=0; i < nverts; ++i) {
-      if (verts[i].type == STBTT_vline) {
-         int x0 = (int) verts[i-1].x, y0 = (int) verts[i-1].y;
-         int x1 = (int) verts[i  ].x, y1 = (int) verts[i  ].y;
-         if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) {
-            float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0;
-            if (x_inter < x)
-               winding += (y0 < y1) ? 1 : -1;
-         }
-      }
-      if (verts[i].type == STBTT_vcurve) {
-         int x0 = (int) verts[i-1].x , y0 = (int) verts[i-1].y ;
-         int x1 = (int) verts[i  ].cx, y1 = (int) verts[i  ].cy;
-         int x2 = (int) verts[i  ].x , y2 = (int) verts[i  ].y ;
-         int ax = STBTT_min(x0,STBTT_min(x1,x2)), ay = STBTT_min(y0,STBTT_min(y1,y2));
-         int by = STBTT_max(y0,STBTT_max(y1,y2));
-         if (y > ay && y < by && x > ax) {
-            float q0[2],q1[2],q2[2];
-            float hits[2][2];
-            q0[0] = (float)x0;
-            q0[1] = (float)y0;
-            q1[0] = (float)x1;
-            q1[1] = (float)y1;
-            q2[0] = (float)x2;
-            q2[1] = (float)y2;
-            if (equal(q0,q1) || equal(q1,q2)) {
-               x0 = (int)verts[i-1].x;
-               y0 = (int)verts[i-1].y;
-               x1 = (int)verts[i  ].x;
-               y1 = (int)verts[i  ].y;
-               if (y > STBTT_min(y0,y1) && y < STBTT_max(y0,y1) && x > STBTT_min(x0,x1)) {
-                  float x_inter = (y - y0) / (y1 - y0) * (x1-x0) + x0;
-                  if (x_inter < x)
-                     winding += (y0 < y1) ? 1 : -1;
-               }
-            } else {
-               int num_hits = stbtt__ray_intersect_bezier(orig, ray, q0, q1, q2, hits);
-               if (num_hits >= 1)
-                  if (hits[0][0] < 0)
-                     winding += (hits[0][1] < 0 ? -1 : 1);
-               if (num_hits >= 2)
-                  if (hits[1][0] < 0)
-                     winding += (hits[1][1] < 0 ? -1 : 1);
-            }
-         }
-      }
-   }
-   return winding;
-}
-
-static float stbtt__cuberoot( float x )
-{
-   if (x<0)
-      return -(float) STBTT_pow(-x,1.0f/3.0f);
-   else
-      return  (float) STBTT_pow( x,1.0f/3.0f);
-}
-
-// x^3 + a*x^2 + b*x + c = 0
-static int stbtt__solve_cubic(float a, float b, float c, float* r)
-{
-   float s = -a / 3;
-   float p = b - a*a / 3;
-   float q = a * (2*a*a - 9*b) / 27 + c;
-   float p3 = p*p*p;
-   float d = q*q + 4*p3 / 27;
-   if (d >= 0) {
-      float z = (float) STBTT_sqrt(d);
-      float u = (-q + z) / 2;
-      float v = (-q - z) / 2;
-      u = stbtt__cuberoot(u);
-      v = stbtt__cuberoot(v);
-      r[0] = s + u + v;
-      return 1;
-   } else {
-      float u = (float) STBTT_sqrt(-p/3);
-      float v = (float) STBTT_acos(-STBTT_sqrt(-27/p3) * q / 2) / 3; // p3 must be negative, since d is negative
-      float m = (float) STBTT_cos(v);
-      float n = (float) STBTT_cos(v-3.141592/2)*1.732050808f;
-      r[0] = s + u * 2 * m;
-      r[1] = s - u * (m + n);
-      r[2] = s - u * (m - n);
-
-      //STBTT_assert( STBTT_fabs(((r[0]+a)*r[0]+b)*r[0]+c) < 0.05f);  // these asserts may not be safe at all scales, though they're in bezier t parameter units so maybe?
-      //STBTT_assert( STBTT_fabs(((r[1]+a)*r[1]+b)*r[1]+c) < 0.05f);
-      //STBTT_assert( STBTT_fabs(((r[2]+a)*r[2]+b)*r[2]+c) < 0.05f);
-      return 3;
-   }
-}
-
-STBTT_DEF unsigned char * stbtt_GetGlyphSDF(const stbtt_fontinfo *info, float scale, int glyph, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff)
-{
-   float scale_x = scale, scale_y = scale;
-   int ix0,iy0,ix1,iy1;
-   int w,h;
-   unsigned char *data;
-
-   if (scale == 0) return NULL;
-
-   stbtt_GetGlyphBitmapBoxSubpixel(info, glyph, scale, scale, 0.0f,0.0f, &ix0,&iy0,&ix1,&iy1);
-
-   // if empty, return NULL
-   if (ix0 == ix1 || iy0 == iy1)
-      return NULL;
-
-   ix0 -= padding;
-   iy0 -= padding;
-   ix1 += padding;
-   iy1 += padding;
-
-   w = (ix1 - ix0);
-   h = (iy1 - iy0);
-
-   if (width ) *width  = w;
-   if (height) *height = h;
-   if (xoff  ) *xoff   = ix0;
-   if (yoff  ) *yoff   = iy0;
-
-   // invert for y-downwards bitmaps
-   scale_y = -scale_y;
-
-   {
-      int x,y,i,j;
-      float *precompute;
-      stbtt_vertex *verts;
-      int num_verts = stbtt_GetGlyphShape(info, glyph, &verts);
-      data = (unsigned char *) STBTT_malloc(w * h, info->userdata);
-      precompute = (float *) STBTT_malloc(num_verts * sizeof(float), info->userdata);
-
-      for (i=0,j=num_verts-1; i < num_verts; j=i++) {
-         if (verts[i].type == STBTT_vline) {
-            float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y;
-            float x1 = verts[j].x*scale_x, y1 = verts[j].y*scale_y;
-            float dist = (float) STBTT_sqrt((x1-x0)*(x1-x0) + (y1-y0)*(y1-y0));
-            precompute[i] = (dist == 0) ? 0.0f : 1.0f / dist;
-         } else if (verts[i].type == STBTT_vcurve) {
-            float x2 = verts[j].x *scale_x, y2 = verts[j].y *scale_y;
-            float x1 = verts[i].cx*scale_x, y1 = verts[i].cy*scale_y;
-            float x0 = verts[i].x *scale_x, y0 = verts[i].y *scale_y;
-            float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2;
-            float len2 = bx*bx + by*by;
-            if (len2 != 0.0f)
-               precompute[i] = 1.0f / (bx*bx + by*by);
-            else
-               precompute[i] = 0.0f;
-         } else
-            precompute[i] = 0.0f;
-      }
-
-      for (y=iy0; y < iy1; ++y) {
-         for (x=ix0; x < ix1; ++x) {
-            float val;
-            float min_dist = 999999.0f;
-            float sx = (float) x + 0.5f;
-            float sy = (float) y + 0.5f;
-            float x_gspace = (sx / scale_x);
-            float y_gspace = (sy / scale_y);
-
-            int winding = stbtt__compute_crossings_x(x_gspace, y_gspace, num_verts, verts); // @OPTIMIZE: this could just be a rasterization, but needs to be line vs. non-tesselated curves so a new path
-
-            for (i=0; i < num_verts; ++i) {
-               float x0 = verts[i].x*scale_x, y0 = verts[i].y*scale_y;
-
-               if (verts[i].type == STBTT_vline && precompute[i] != 0.0f) {
-                  float x1 = verts[i-1].x*scale_x, y1 = verts[i-1].y*scale_y;
-
-                  float dist,dist2 = (x0-sx)*(x0-sx) + (y0-sy)*(y0-sy);
-                  if (dist2 < min_dist*min_dist)
-                     min_dist = (float) STBTT_sqrt(dist2);
-
-                  // coarse culling against bbox
-                  //if (sx > STBTT_min(x0,x1)-min_dist && sx < STBTT_max(x0,x1)+min_dist &&
-                  //    sy > STBTT_min(y0,y1)-min_dist && sy < STBTT_max(y0,y1)+min_dist)
-                  dist = (float) STBTT_fabs((x1-x0)*(y0-sy) - (y1-y0)*(x0-sx)) * precompute[i];
-                  STBTT_assert(i != 0);
-                  if (dist < min_dist) {
-                     // check position along line
-                     // x' = x0 + t*(x1-x0), y' = y0 + t*(y1-y0)
-                     // minimize (x'-sx)*(x'-sx)+(y'-sy)*(y'-sy)
-                     float dx = x1-x0, dy = y1-y0;
-                     float px = x0-sx, py = y0-sy;
-                     // minimize (px+t*dx)^2 + (py+t*dy)^2 = px*px + 2*px*dx*t + t^2*dx*dx + py*py + 2*py*dy*t + t^2*dy*dy
-                     // derivative: 2*px*dx + 2*py*dy + (2*dx*dx+2*dy*dy)*t, set to 0 and solve
-                     float t = -(px*dx + py*dy) / (dx*dx + dy*dy);
-                     if (t >= 0.0f && t <= 1.0f)
-                        min_dist = dist;
-                  }
-               } else if (verts[i].type == STBTT_vcurve) {
-                  float x2 = verts[i-1].x *scale_x, y2 = verts[i-1].y *scale_y;
-                  float x1 = verts[i  ].cx*scale_x, y1 = verts[i  ].cy*scale_y;
-                  float box_x0 = STBTT_min(STBTT_min(x0,x1),x2);
-                  float box_y0 = STBTT_min(STBTT_min(y0,y1),y2);
-                  float box_x1 = STBTT_max(STBTT_max(x0,x1),x2);
-                  float box_y1 = STBTT_max(STBTT_max(y0,y1),y2);
-                  // coarse culling against bbox to avoid computing cubic unnecessarily
-                  if (sx > box_x0-min_dist && sx < box_x1+min_dist && sy > box_y0-min_dist && sy < box_y1+min_dist) {
-                     int num=0;
-                     float ax = x1-x0, ay = y1-y0;
-                     float bx = x0 - 2*x1 + x2, by = y0 - 2*y1 + y2;
-                     float mx = x0 - sx, my = y0 - sy;
-                     float res[3] = {0.f,0.f,0.f};
-                     float px,py,t,it,dist2;
-                     float a_inv = precompute[i];
-                     if (a_inv == 0.0) { // if a_inv is 0, it's 2nd degree so use quadratic formula
-                        float a = 3*(ax*bx + ay*by);
-                        float b = 2*(ax*ax + ay*ay) + (mx*bx+my*by);
-                        float c = mx*ax+my*ay;
-                        if (a == 0.0) { // if a is 0, it's linear
-                           if (b != 0.0) {
-                              res[num++] = -c/b;
-                           }
-                        } else {
-                           float discriminant = b*b - 4*a*c;
-                           if (discriminant < 0)
-                              num = 0;
-                           else {
-                              float root = (float) STBTT_sqrt(discriminant);
-                              res[0] = (-b - root)/(2*a);
-                              res[1] = (-b + root)/(2*a);
-                              num = 2; // don't bother distinguishing 1-solution case, as code below will still work
-                           }
-                        }
-                     } else {
-                        float b = 3*(ax*bx + ay*by) * a_inv; // could precompute this as it doesn't depend on sample point
-                        float c = (2*(ax*ax + ay*ay) + (mx*bx+my*by)) * a_inv;
-                        float d = (mx*ax+my*ay) * a_inv;
-                        num = stbtt__solve_cubic(b, c, d, res);
-                     }
-                     dist2 = (x0-sx)*(x0-sx) + (y0-sy)*(y0-sy);
-                     if (dist2 < min_dist*min_dist)
-                        min_dist = (float) STBTT_sqrt(dist2);
-
-                     if (num >= 1 && res[0] >= 0.0f && res[0] <= 1.0f) {
-                        t = res[0], it = 1.0f - t;
-                        px = it*it*x0 + 2*t*it*x1 + t*t*x2;
-                        py = it*it*y0 + 2*t*it*y1 + t*t*y2;
-                        dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy);
-                        if (dist2 < min_dist * min_dist)
-                           min_dist = (float) STBTT_sqrt(dist2);
-                     }
-                     if (num >= 2 && res[1] >= 0.0f && res[1] <= 1.0f) {
-                        t = res[1], it = 1.0f - t;
-                        px = it*it*x0 + 2*t*it*x1 + t*t*x2;
-                        py = it*it*y0 + 2*t*it*y1 + t*t*y2;
-                        dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy);
-                        if (dist2 < min_dist * min_dist)
-                           min_dist = (float) STBTT_sqrt(dist2);
-                     }
-                     if (num >= 3 && res[2] >= 0.0f && res[2] <= 1.0f) {
-                        t = res[2], it = 1.0f - t;
-                        px = it*it*x0 + 2*t*it*x1 + t*t*x2;
-                        py = it*it*y0 + 2*t*it*y1 + t*t*y2;
-                        dist2 = (px-sx)*(px-sx) + (py-sy)*(py-sy);
-                        if (dist2 < min_dist * min_dist)
-                           min_dist = (float) STBTT_sqrt(dist2);
-                     }
-                  }
-               }
-            }
-            if (winding == 0)
-               min_dist = -min_dist;  // if outside the shape, value is negative
-            val = onedge_value + pixel_dist_scale * min_dist;
-            if (val < 0)
-               val = 0;
-            else if (val > 255)
-               val = 255;
-            data[(y-iy0)*w+(x-ix0)] = (unsigned char) val;
-         }
-      }
-      STBTT_free(precompute, info->userdata);
-      STBTT_free(verts, info->userdata);
-   }
-   return data;
-}
-
-STBTT_DEF unsigned char * stbtt_GetCodepointSDF(const stbtt_fontinfo *info, float scale, int codepoint, int padding, unsigned char onedge_value, float pixel_dist_scale, int *width, int *height, int *xoff, int *yoff)
-{
-   return stbtt_GetGlyphSDF(info, scale, stbtt_FindGlyphIndex(info, codepoint), padding, onedge_value, pixel_dist_scale, width, height, xoff, yoff);
-}
-
-STBTT_DEF void stbtt_FreeSDF(unsigned char *bitmap, void *userdata)
-{
-   STBTT_free(bitmap, userdata);
-}
-
-//////////////////////////////////////////////////////////////////////////////
-//
-// font name matching -- recommended not to use this
-//
-
-// check if a utf8 string contains a prefix which is the utf16 string; if so return length of matching utf8 string
-static stbtt_int32 stbtt__CompareUTF8toUTF16_bigendian_prefix(stbtt_uint8 *s1, stbtt_int32 len1, stbtt_uint8 *s2, stbtt_int32 len2)
-{
-   stbtt_int32 i=0;
-
-   // convert utf16 to utf8 and compare the results while converting
-   while (len2) {
-      stbtt_uint16 ch = s2[0]*256 + s2[1];
-      if (ch < 0x80) {
-         if (i >= len1) return -1;
-         if (s1[i++] != ch) return -1;
-      } else if (ch < 0x800) {
-         if (i+1 >= len1) return -1;
-         if (s1[i++] != 0xc0 + (ch >> 6)) return -1;
-         if (s1[i++] != 0x80 + (ch & 0x3f)) return -1;
-      } else if (ch >= 0xd800 && ch < 0xdc00) {
-         stbtt_uint32 c;
-         stbtt_uint16 ch2 = s2[2]*256 + s2[3];
-         if (i+3 >= len1) return -1;
-         c = ((ch - 0xd800) << 10) + (ch2 - 0xdc00) + 0x10000;
-         if (s1[i++] != 0xf0 + (c >> 18)) return -1;
-         if (s1[i++] != 0x80 + ((c >> 12) & 0x3f)) return -1;
-         if (s1[i++] != 0x80 + ((c >>  6) & 0x3f)) return -1;
-         if (s1[i++] != 0x80 + ((c      ) & 0x3f)) return -1;
-         s2 += 2; // plus another 2 below
-         len2 -= 2;
-      } else if (ch >= 0xdc00 && ch < 0xe000) {
-         return -1;
-      } else {
-         if (i+2 >= len1) return -1;
-         if (s1[i++] != 0xe0 + (ch >> 12)) return -1;
-         if (s1[i++] != 0x80 + ((ch >> 6) & 0x3f)) return -1;
-         if (s1[i++] != 0x80 + ((ch     ) & 0x3f)) return -1;
-      }
-      s2 += 2;
-      len2 -= 2;
-   }
-   return i;
-}
-
-static int stbtt_CompareUTF8toUTF16_bigendian_internal(char *s1, int len1, char *s2, int len2)
-{
-   return len1 == stbtt__CompareUTF8toUTF16_bigendian_prefix((stbtt_uint8*) s1, len1, (stbtt_uint8*) s2, len2);
-}
-
-// returns results in whatever encoding you request... but note that 2-byte encodings
-// will be BIG-ENDIAN... use stbtt_CompareUTF8toUTF16_bigendian() to compare
-STBTT_DEF const char *stbtt_GetFontNameString(const stbtt_fontinfo *font, int *length, int platformID, int encodingID, int languageID, int nameID)
-{
-   stbtt_int32 i,count,stringOffset;
-   stbtt_uint8 *fc = font->data;
-   stbtt_uint32 offset = font->fontstart;
-   stbtt_uint32 nm = stbtt__find_table(fc, offset, "name");
-   if (!nm) return NULL;
-
-   count = ttUSHORT(fc+nm+2);
-   stringOffset = nm + ttUSHORT(fc+nm+4);
-   for (i=0; i < count; ++i) {
-      stbtt_uint32 loc = nm + 6 + 12 * i;
-      if (platformID == ttUSHORT(fc+loc+0) && encodingID == ttUSHORT(fc+loc+2)
-          && languageID == ttUSHORT(fc+loc+4) && nameID == ttUSHORT(fc+loc+6)) {
-         *length = ttUSHORT(fc+loc+8);
-         return (const char *) (fc+stringOffset+ttUSHORT(fc+loc+10));
-      }
-   }
-   return NULL;
-}
-
-static int stbtt__matchpair(stbtt_uint8 *fc, stbtt_uint32 nm, stbtt_uint8 *name, stbtt_int32 nlen, stbtt_int32 target_id, stbtt_int32 next_id)
-{
-   stbtt_int32 i;
-   stbtt_int32 count = ttUSHORT(fc+nm+2);
-   stbtt_int32 stringOffset = nm + ttUSHORT(fc+nm+4);
-
-   for (i=0; i < count; ++i) {
-      stbtt_uint32 loc = nm + 6 + 12 * i;
-      stbtt_int32 id = ttUSHORT(fc+loc+6);
-      if (id == target_id) {
-         // find the encoding
-         stbtt_int32 platform = ttUSHORT(fc+loc+0), encoding = ttUSHORT(fc+loc+2), language = ttUSHORT(fc+loc+4);
-
-         // is this a Unicode encoding?
-         if (platform == 0 || (platform == 3 && encoding == 1) || (platform == 3 && encoding == 10)) {
-            stbtt_int32 slen = ttUSHORT(fc+loc+8);
-            stbtt_int32 off = ttUSHORT(fc+loc+10);
-
-            // check if there's a prefix match
-            stbtt_int32 matchlen = stbtt__CompareUTF8toUTF16_bigendian_prefix(name, nlen, fc+stringOffset+off,slen);
-            if (matchlen >= 0) {
-               // check for target_id+1 immediately following, with same encoding & language
-               if (i+1 < count && ttUSHORT(fc+loc+12+6) == next_id && ttUSHORT(fc+loc+12) == platform && ttUSHORT(fc+loc+12+2) == encoding && ttUSHORT(fc+loc+12+4) == language) {
-                  slen = ttUSHORT(fc+loc+12+8);
-                  off = ttUSHORT(fc+loc+12+10);
-                  if (slen == 0) {
-                     if (matchlen == nlen)
-                        return 1;
-                  } else if (matchlen < nlen && name[matchlen] == ' ') {
-                     ++matchlen;
-                     if (stbtt_CompareUTF8toUTF16_bigendian_internal((char*) (name+matchlen), nlen-matchlen, (char*)(fc+stringOffset+off),slen))
-                        return 1;
-                  }
-               } else {
-                  // if nothing immediately following
-                  if (matchlen == nlen)
-                     return 1;
-               }
-            }
-         }
-
-         // @TODO handle other encodings
-      }
-   }
-   return 0;
-}
-
-static int stbtt__matches(stbtt_uint8 *fc, stbtt_uint32 offset, stbtt_uint8 *name, stbtt_int32 flags)
-{
-   stbtt_int32 nlen = (stbtt_int32) STBTT_strlen((char *) name);
-   stbtt_uint32 nm,hd;
-   if (!stbtt__isfont(fc+offset)) return 0;
-
-   // check italics/bold/underline flags in macStyle...
-   if (flags) {
-      hd = stbtt__find_table(fc, offset, "head");
-      if ((ttUSHORT(fc+hd+44) & 7) != (flags & 7)) return 0;
-   }
-
-   nm = stbtt__find_table(fc, offset, "name");
-   if (!nm) return 0;
-
-   if (flags) {
-      // if we checked the macStyle flags, then just check the family and ignore the subfamily
-      if (stbtt__matchpair(fc, nm, name, nlen, 16, -1))  return 1;
-      if (stbtt__matchpair(fc, nm, name, nlen,  1, -1))  return 1;
-      if (stbtt__matchpair(fc, nm, name, nlen,  3, -1))  return 1;
-   } else {
-      if (stbtt__matchpair(fc, nm, name, nlen, 16, 17))  return 1;
-      if (stbtt__matchpair(fc, nm, name, nlen,  1,  2))  return 1;
-      if (stbtt__matchpair(fc, nm, name, nlen,  3, -1))  return 1;
-   }
-
-   return 0;
-}
-
-static int stbtt_FindMatchingFont_internal(unsigned char *font_collection, char *name_utf8, stbtt_int32 flags)
-{
-   stbtt_int32 i;
-   for (i=0;;++i) {
-      stbtt_int32 off = stbtt_GetFontOffsetForIndex(font_collection, i);
-      if (off < 0) return off;
-      if (stbtt__matches((stbtt_uint8 *) font_collection, off, (stbtt_uint8*) name_utf8, flags))
-         return off;
-   }
-}
-
-#if defined(__GNUC__) || defined(__clang__)
-#pragma GCC diagnostic push
-#pragma GCC diagnostic ignored "-Wcast-qual"
-#endif
-
-STBTT_DEF int stbtt_BakeFontBitmap(const unsigned char *data, int offset,
-                                float pixel_height, unsigned char *pixels, int pw, int ph,
-                                int first_char, int num_chars, stbtt_bakedchar *chardata)
-{
-   return stbtt_BakeFontBitmap_internal((unsigned char *) data, offset, pixel_height, pixels, pw, ph, first_char, num_chars, chardata);
-}
-
-STBTT_DEF int stbtt_GetFontOffsetForIndex(const unsigned char *data, int index)
-{
-   return stbtt_GetFontOffsetForIndex_internal((unsigned char *) data, index);
-}
-
-STBTT_DEF int stbtt_GetNumberOfFonts(const unsigned char *data)
-{
-   return stbtt_GetNumberOfFonts_internal((unsigned char *) data);
-}
-
-STBTT_DEF int stbtt_InitFont(stbtt_fontinfo *info, const unsigned char *data, int offset)
-{
-   return stbtt_InitFont_internal(info, (unsigned char *) data, offset);
-}
-
-STBTT_DEF int stbtt_FindMatchingFont(const unsigned char *fontdata, const char *name, int flags)
-{
-   return stbtt_FindMatchingFont_internal((unsigned char *) fontdata, (char *) name, flags);
-}
-
-STBTT_DEF int stbtt_CompareUTF8toUTF16_bigendian(const char *s1, int len1, const char *s2, int len2)
-{
-   return stbtt_CompareUTF8toUTF16_bigendian_internal((char *) s1, len1, (char *) s2, len2);
-}
-
-#if defined(__GNUC__) || defined(__clang__)
-#pragma GCC diagnostic pop
-#endif
-
-#endif // STB_TRUETYPE_IMPLEMENTATION
-
-
-// FULL VERSION HISTORY
-//
-//   1.25 (2021-07-11) many fixes
-//   1.24 (2020-02-05) fix warning
-//   1.23 (2020-02-02) query SVG data for glyphs; query whole kerning table (but only kern not GPOS)
-//   1.22 (2019-08-11) minimize missing-glyph duplication; fix kerning if both 'GPOS' and 'kern' are defined
-//   1.21 (2019-02-25) fix warning
-//   1.20 (2019-02-07) PackFontRange skips missing codepoints; GetScaleFontVMetrics()
-//   1.19 (2018-02-11) OpenType GPOS kerning (horizontal only), STBTT_fmod
-//   1.18 (2018-01-29) add missing function
-//   1.17 (2017-07-23) make more arguments const; doc fix
-//   1.16 (2017-07-12) SDF support
-//   1.15 (2017-03-03) make more arguments const
-//   1.14 (2017-01-16) num-fonts-in-TTC function
-//   1.13 (2017-01-02) support OpenType fonts, certain Apple fonts
-//   1.12 (2016-10-25) suppress warnings about casting away const with -Wcast-qual
-//   1.11 (2016-04-02) fix unused-variable warning
-//   1.10 (2016-04-02) allow user-defined fabs() replacement
-//                     fix memory leak if fontsize=0.0
-//                     fix warning from duplicate typedef
-//   1.09 (2016-01-16) warning fix; avoid crash on outofmem; use alloc userdata for PackFontRanges
-//   1.08 (2015-09-13) document stbtt_Rasterize(); fixes for vertical & horizontal edges
-//   1.07 (2015-08-01) allow PackFontRanges to accept arrays of sparse codepoints;
-//                     allow PackFontRanges to pack and render in separate phases;
-//                     fix stbtt_GetFontOFfsetForIndex (never worked for non-0 input?);
-//                     fixed an assert() bug in the new rasterizer
-//                     replace assert() with STBTT_assert() in new rasterizer
-//   1.06 (2015-07-14) performance improvements (~35% faster on x86 and x64 on test machine)
-//                     also more precise AA rasterizer, except if shapes overlap
-//                     remove need for STBTT_sort
-//   1.05 (2015-04-15) fix misplaced definitions for STBTT_STATIC
-//   1.04 (2015-04-15) typo in example
-//   1.03 (2015-04-12) STBTT_STATIC, fix memory leak in new packing, various fixes
-//   1.02 (2014-12-10) fix various warnings & compile issues w/ stb_rect_pack, C++
-//   1.01 (2014-12-08) fix subpixel position when oversampling to exactly match
-//                        non-oversampled; STBTT_POINT_SIZE for packed case only
-//   1.00 (2014-12-06) add new PackBegin etc. API, w/ support for oversampling
-//   0.99 (2014-09-18) fix multiple bugs with subpixel rendering (ryg)
-//   0.9  (2014-08-07) support certain mac/iOS fonts without an MS platformID
-//   0.8b (2014-07-07) fix a warning
-//   0.8  (2014-05-25) fix a few more warnings
-//   0.7  (2013-09-25) bugfix: subpixel glyph bug fixed in 0.5 had come back
-//   0.6c (2012-07-24) improve documentation
-//   0.6b (2012-07-20) fix a few more warnings
-//   0.6  (2012-07-17) fix warnings; added stbtt_ScaleForMappingEmToPixels,
-//                        stbtt_GetFontBoundingBox, stbtt_IsGlyphEmpty
-//   0.5  (2011-12-09) bugfixes:
-//                        subpixel glyph renderer computed wrong bounding box
-//                        first vertex of shape can be off-curve (FreeSans)
-//   0.4b (2011-12-03) fixed an error in the font baking example
-//   0.4  (2011-12-01) kerning, subpixel rendering (tor)
-//                    bugfixes for:
-//                        codepoint-to-glyph conversion using table fmt=12
-//                        codepoint-to-glyph conversion using table fmt=4
-//                        stbtt_GetBakedQuad with non-square texture (Zer)
-//                    updated Hello World! sample to use kerning and subpixel
-//                    fixed some warnings
-//   0.3  (2009-06-24) cmap fmt=12, compound shapes (MM)
-//                    userdata, malloc-from-userdata, non-zero fill (stb)
-//   0.2  (2009-03-11) Fix unsigned/signed char warnings
-//   0.1  (2009-03-09) First public release
-//
-
-/*
-------------------------------------------------------------------------------
-This software is available under 2 licenses -- choose whichever you prefer.
-------------------------------------------------------------------------------
-ALTERNATIVE A - MIT License
-Copyright (c) 2017 Sean Barrett
-Permission is hereby granted, free of charge, to any person obtaining a copy of
-this software and associated documentation files (the "Software"), to deal in
-the Software without restriction, including without limitation the rights to
-use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
-of the Software, and to permit persons to whom the Software is furnished to do
-so, subject to the following conditions:
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
-------------------------------------------------------------------------------
-ALTERNATIVE B - Public Domain (www.unlicense.org)
-This is free and unencumbered software released into the public domain.
-Anyone is free to copy, modify, publish, use, compile, sell, or distribute this
-software, either in source code form or as a compiled binary, for any purpose,
-commercial or non-commercial, and by any means.
-In jurisdictions that recognize copyright laws, the author or authors of this
-software dedicate any and all copyright interest in the software to the public
-domain. We make this dedication for the benefit of the public at large and to
-the detriment of our heirs and successors. We intend this dedication to be an
-overt act of relinquishment in perpetuity of all present and future rights to
-this software under copyright law.
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
-ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-------------------------------------------------------------------------------
-*/