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Added a hint "SDL_SURFACE_MALLOC" to disable aligned surface allocation

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This is needed for sdl12-compat, where all surfaces were not aligned.
This commit is contained in:
Sam Lantinga
2026-04-02 10:30:32 -07:00
parent b5ef75249f
commit 156187bf58
1 changed files with 6 additions and 2 deletions
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6
src/video/SDL_surface.c
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@@ -229,12 +229,16 @@ SDL_Surface *SDL_CreateSurface(int width, int height, SDL_PixelFormat format)
if (surface->w && surface->h && format != SDL_PIXELFORMAT_MJPG) { if (surface->w && surface->h && format != SDL_PIXELFORMAT_MJPG) {
surface->flags &= ~SDL_SURFACE_PREALLOCATED; surface->flags &= ~SDL_SURFACE_PREALLOCATED;
if (SDL_GetHintBoolean("SDL_SURFACE_MALLOC", false)) {
surface->pixels = SDL_malloc(size);
} else {
surface->flags |= SDL_SURFACE_SIMD_ALIGNED;
surface->pixels = SDL_aligned_alloc(SDL_GetSIMDAlignment(), size); surface->pixels = SDL_aligned_alloc(SDL_GetSIMDAlignment(), size);
}
if (!surface->pixels) { if (!surface->pixels) {
SDL_DestroySurface(surface); SDL_DestroySurface(surface);
return NULL; return NULL;
} }
surface->flags |= SDL_SURFACE_SIMD_ALIGNED;
// This is important for bitmaps // This is important for bitmaps
SDL_memset(surface->pixels, 0, size); SDL_memset(surface->pixels, 0, size);