1 files changed, 68 insertions, 0 deletions
diff --git a/source/nanovg/android.c b/source/nanovg/android.c
new file mode 100644
index 0000000..15d1e60
--- /dev/null
+++ b/source/nanovg/android.c
@@ -0,0 +1,68 @@
+// See: http://www.50ply.com/blog/2013/01/19/loading-compressed-android-assets-with-file-pointer/
+// See: https://github.com/android/ndk/issues/562
+
+#include "android.h"
+#include "nanovg.h"
+
+#if defined(__ANDROID__)
+
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <android/log.h>
+#include <android/asset_manager.h>
+
+#define LOGV(...) (__android_log_print(ANDROID_LOG_VERBOSE, "NanoVG Demo", __VA_ARGS__))
+#define LOGI(...) (__android_log_print(ANDROID_LOG_INFO,    "NanoVG Demo", __VA_ARGS__))
+#define LOGW(...) (__android_log_print(ANDROID_LOG_WARN,    "NanoVG Demo", __VA_ARGS__))
+#define LOGE(...) (__android_log_print(ANDROID_LOG_ERROR,   "NanoVG Demo", __VA_ARGS__))
+#define LOGF(...) (__android_log_print(ANDROID_LOG_FATAL,   "NanoVG Demo", __VA_ARGS__))
+
+static int android_read(void * cookie, char * buf, int size) {
+  return AAsset_read((AAsset*)cookie, buf, size);
+}
+
+static int android_write(void * cookie, const char * buf, int size) {
+  (void)cookie; (void)buf; (void)size; // unused
+  return EACCES; // can't provide write access to the apk
+}
+
+static fpos_t android_seek(void * cookie, fpos_t offset, int whence) {
+  return AAsset_seek((AAsset*)cookie, offset, whence);
+}
+
+static int android_close(void * cookie) {
+  AAsset_close((AAsset*)cookie);
+  return 0;
+}
+
+AAssetManager * android_asset_manager = NULL;
+void nvgSetAndroidAssetManager(AAssetManager * manager) {
+  android_asset_manager = manager;
+}
+
+FILE * android_fopen(const char * fname, const char * mode) {
+  if (mode[0] == '/') { // absolute path
+  }
+
+  if (strchr(mode, 'w')) { // for writing
+    LOGE("Unable to open asset (trying to write): '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  if (!android_asset_manager) {
+    LOGE("Unable to open asset (unknown asset manager): '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  AAsset* asset = AAssetManager_open(android_asset_manager, fname, 0);
+  if (!asset) {
+    LOGW("Unable to open asset: '%s' ('%s')", fname, mode);
+    return NULL;
+  }
+
+  LOGV("Opening asset: '%s' ('%s')", fname, mode);
+  return funopen(asset, android_read, android_write, android_seek, android_close);
+}
+
+#endif