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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.

(cherry picked from commit dd01e096e9)
This commit is contained in:
Sam Lantinga
2026-04-02 10:36:56 -07:00
parent 47aae3e16d
commit 473efcf53c
1 changed files with 7 additions and 2 deletions
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9
src/video/SDL_surface.c
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@@ -20,6 +20,7 @@
*/
#include "../SDL_internal.h"
#include "SDL_hints.h"
#include "SDL_video.h"
#include "SDL_sysvideo.h"
#include "SDL_blit.h"
@@ -153,13 +154,17 @@ SDL_Surface *SDL_CreateRGBSurfaceWithFormat(Uint32 flags, int width, int height,
return NULL;
}
surface->pixels = SDL_SIMDAlloc(size);
if (SDL_GetHintBoolean("SDL_SURFACE_MALLOC", SDL_FALSE)) {
surface->pixels = SDL_malloc(size);
} else {
surface->flags |= SDL_SIMD_ALIGNED;
surface->pixels = SDL_SIMDAlloc(size);
}
if (!surface->pixels) {
SDL_FreeSurface(surface);
SDL_OutOfMemory();
return NULL;
}
surface->flags |= SDL_SIMD_ALIGNED;
/* This is important for bitmaps */
SDL_memset(surface->pixels, 0, size);
}