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Fixed bug 4484 - use SIMD aligned memory for SDL_Surface

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Surfaces are allocated using SDL_SIMDAlloc()
They are marked with SDL_SIMD_ALIGNED flag to appropriatly free them with SDL_SIMDFree()
(Flag is cleared when pixels is free'd in RLE, in case user would hijack the pixels ptr)

When providing its own memory pointer (SDL_CreateRGBSurfaceFrom()) and clearing
SDL_PREALLOC  to delegate to SDL the memory free, it's the responsability of the user
to add SDL_SIMD_ALIGNED or not, whether the pointer has been allocated with SDL_malloc() or
SDL_SIMDAlloc().
This commit is contained in:
Sylvain Becker
2019-02-04 09:11:07 +01:00
parent 9292dc7ca1
commit 670f3d3327
2 changed files with 11 additions and 5 deletions
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3
src/video/SDL_surface.c
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@@ -120,12 +120,13 @@ SDL_CreateRGBSurfaceWithFormat(Uint32 flags, int width, int height, int depth,
return NULL;
}
surface->pixels = SDL_malloc((size_t)size);
surface->pixels = SDL_SIMDAlloc((size_t)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, surface->h * surface->pitch);
}