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Improved support for byte array pixel formats

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Fixes https://github.com/libsdl-org/SDL/issues/15082

(cherry picked from commit 4f06087b36)
This commit is contained in:
Sam Lantinga
2026-02-21 12:51:26 -08:00
parent d01ec84d85
commit 74bfc913ac
1 changed files with 86 additions and 18 deletions
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104
src/video/SDL_pixels.c
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@@ -259,30 +259,98 @@ bool SDL_GetMasksForPixelFormat(SDL_PixelFormat format, int *bpp, Uint32 *Rmask,
}
*Rmask = *Gmask = *Bmask = *Amask = 0;
if (format == SDL_PIXELFORMAT_RGB24) {
if (SDL_PIXELTYPE(format) == SDL_PIXELTYPE_ARRAYU8) {
switch (SDL_BYTESPERPIXEL(format)) {
case 3:
switch (SDL_PIXELORDER(format)) {
case SDL_ARRAYORDER_RGB:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
#else
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
#endif
return true;
}
if (format == SDL_PIXELFORMAT_BGR24) {
return true;
case SDL_ARRAYORDER_BGR:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
#else
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
#endif
return true;
return true;
default:
break;
}
break;
case 4:
switch (SDL_PIXELORDER(format)) {
case SDL_ARRAYORDER_RGBA:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0xFF000000;
*Gmask = 0x00FF0000;
*Bmask = 0x0000FF00;
*Amask = 0x000000FF;
#else
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
*Amask = 0xFF000000;
#endif
return true;
case SDL_ARRAYORDER_ARGB:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
*Amask = 0xFF000000;
#else
*Rmask = 0x0000FF00;
*Gmask = 0x00FF0000;
*Bmask = 0xFF000000;
*Amask = 0x000000FF;
#endif
return true;
case SDL_ARRAYORDER_BGRA:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0x0000FF00;
*Gmask = 0x00FF0000;
*Bmask = 0xFF000000;
*Amask = 0x000000FF;
#else
*Rmask = 0x00FF0000;
*Gmask = 0x0000FF00;
*Bmask = 0x000000FF;
*Amask = 0xFF000000;
#endif
return true;
case SDL_ARRAYORDER_ABGR:
#if SDL_BYTEORDER == SDL_BIG_ENDIAN
*Rmask = 0x000000FF;
*Gmask = 0x0000FF00;
*Bmask = 0x00FF0000;
*Amask = 0xFF000000;
#else
*Rmask = 0xFF000000;
*Gmask = 0x00FF0000;
*Bmask = 0x0000FF00;
*Amask = 0x000000FF;
#endif
return true;
default:
break;
}
break;
default:
break;
}
return SDL_SetError("Unknown pixel format");
}
if (SDL_PIXELTYPE(format) != SDL_PIXELTYPE_PACKED8 &&