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Enable creation of yuv SDL_Surfaces (#6735)

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This commit is contained in:
Sylvain Becker
2022-12-02 21:53:48 +01:00
committed by GitHub
parent 0a3262e819
commit 92cd2c0a74
9 changed files with 335 additions and 165 deletions
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34
src/video/SDL_surface.c
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@@ -26,6 +26,7 @@
#include "SDL_pixels_c.h"
#include "SDL_yuv_c.h"
#include "../render/SDL_sysrender.h"
#include "../video/SDL_yuv_c.h"
/* Check to make sure we can safely check multiplication of surface w and pitch and it won't overflow size_t */
SDL_COMPILE_TIME_ASSERT(surface_size_assumptions,
@@ -142,6 +143,15 @@ SDL_CreateSurface(int width, int height, Uint32 format)
return NULL;
}
if (SDL_ISPIXELFORMAT_FOURCC(surface->format->format)) {
/* Get correct size and pitch for YUV formats */
if (SDL_CalculateYUVSize(surface->format->format, surface->w, surface->h, &size, &surface->pitch) < 0) {
SDL_OutOfMemory();
SDL_FreeSurface(surface);
return NULL;
}
}
surface->pixels = SDL_SIMDAlloc(size);
if (!surface->pixels) {
SDL_FreeSurface(surface);
@@ -176,8 +186,8 @@ SDL_CreateSurface(int width, int height, Uint32 format)
*/
SDL_Surface *
SDL_CreateSurfaceFrom(void *pixels,
int width, int height, int pitch,
Uint32 format)
int width, int height, int pitch,
Uint32 format)
{
SDL_Surface *surface;
size_t minimalPitch;
@@ -1093,6 +1103,23 @@ SDL_ConvertSurface(SDL_Surface *surface, const SDL_PixelFormat *format)
return NULL;
}
if (SDL_ISPIXELFORMAT_FOURCC(format->format) || SDL_ISPIXELFORMAT_FOURCC(surface->format->format)) {
ret = SDL_ConvertPixels(surface->w, surface->h,
surface->format->format, surface->pixels, surface->pitch,
convert->format->format, convert->pixels, convert->pitch);
if (ret < 0) {
SDL_FreeSurface(convert);
return NULL;
}
/* Save the original copy flags */
copy_flags = surface->map->info.flags;
goto end;
}
/* Copy the palette if any */
if (format->palette && convert->format->palette) {
SDL_memcpy(convert->format->palette->colors,
@@ -1258,6 +1285,9 @@ SDL_ConvertSurface(SDL_Surface *surface, const SDL_PixelFormat *format)
}
}
}
end:
SDL_SetClipRect(convert, &surface->clip_rect);
/* Enable alpha blending by default if the new surface has an