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Add support for palette icon formats

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To support more icon formats.
This commit is contained in:
Romain Vimont 2021-10-22 18:51:20 +02:00
parent 0e4564da03
commit 12ed2f2402
1 changed files with 39 additions and 4 deletions
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43
app/src/icon.c
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@ -173,6 +173,7 @@ to_sdl_pixel_format(enum AVPixelFormat fmt) {
case AV_PIX_FMT_BGR555BE: return SDL_PIXELFORMAT_BGR555;
case AV_PIX_FMT_RGB444BE: return SDL_PIXELFORMAT_RGB444;
case AV_PIX_FMT_BGR444BE: return SDL_PIXELFORMAT_BGR444;
case AV_PIX_FMT_PAL8: return SDL_PIXELFORMAT_INDEX8;
default: return SDL_PIXELFORMAT_UNKNOWN;
}
}
@ -190,10 +191,9 @@ load_from_path(const char *path) {
goto error;
}
bool is_packed_rgb = desc->flags & AV_PIX_FMT_FLAG_RGB
&& !(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
if (!is_packed_rgb) {
LOGE("Could not load non-RGB icon");
bool is_packed = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
if (!is_packed) {
LOGE("Could not load non-packed icon");
goto error;
}
@ -217,6 +217,41 @@ load_from_path(const char *path) {
goto error;
}
if (frame->format == AV_PIX_FMT_PAL8) {
// Initialize the SDL palette
uint8_t *data = frame->data[1];
SDL_Color colors[256];
for (int i = 0; i < 256; ++i) {
SDL_Color *color = &colors[i];
// The palette is transported in AVFrame.data[1], is 1024 bytes
// long (256 4-byte entries) and is formatted the same as in
// AV_PIX_FMT_RGB32 described above (i.e., it is also
// endian-specific).
// <https://ffmpeg.org/doxygen/4.1/pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5>
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
color->a = data[i * 4];
color->r = data[i * 4 + 1];
color->g = data[i * 4 + 2];
color->b = data[i * 4 + 3];
#else
color->a = data[i * 4 + 3];
color->r = data[i * 4 + 2];
color->g = data[i * 4 + 1];
color->b = data[i * 4];
#endif
}
SDL_Palette *palette = surface->format->palette;
assert(palette);
int ret = SDL_SetPaletteColors(palette, colors, 0, 256);
if (ret) {
LOGE("Could not set palette colors");
SDL_FreeSurface(surface);
goto error;
}
}
surface->userdata = frame; // frame owns the data
return surface;