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Fixed failing SDL_ConvertSurface() when blit has failed. 

Some blit combination are not supported (eg ARGB8888 -> SDL_PIXELFORMAT_INDEX1MSB)
So prevent SDL_ConvertSurface from creating a broken surface, which cannot be blitted
Sylvain Becker 2019-01-30 16:36:47 +01:00
parent a052d81bdf
commit 5b07148f73
1 changed files with 9 additions and 1 deletions
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10
src/video/SDL_surface.c
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@ -957,6 +957,7 @@ SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
Uint32 copy_flags;
SDL_Color copy_color;
SDL_Rect bounds;
int ret;
if (!surface) {
SDL_InvalidParamError("surface");
@ -1017,7 +1018,7 @@ SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
bounds.y = 0;
bounds.w = surface->w;
bounds.h = surface->h;
SDL_LowerBlit(surface, &bounds, convert, &bounds);
ret = SDL_LowerBlit(surface, &bounds, convert, &bounds);
/* Clean up the original surface, and update converted surface */
convert->map->info.r = copy_color.r;
@ -1035,6 +1036,13 @@ SDL_ConvertSurface(SDL_Surface * surface, const SDL_PixelFormat * format,
surface->map->info.a = copy_color.a;
surface->map->info.flags = copy_flags;
SDL_InvalidateMap(surface->map);
/* SDL_LowerBlit failed, and so the conversion */
if (ret < 0) {
SDL_FreeSurface(convert);
return NULL;
}
if (copy_flags & SDL_COPY_COLORKEY) {
SDL_bool set_colorkey_by_color = SDL_FALSE;
SDL_bool ignore_alpha = SDL_TRUE; /* Ignore, or not, alpha in colorkey comparison */