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Convert bitmap surface to RGBA for scaling

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Scaling bitmaps isn't currently supported, so we convert to RGBA for now.
This commit is contained in:
Sam Lantinga 2024-08-10 16:42:45 -07:00
parent f93920a4f1
commit 15a19bd69f
1 changed files with 18 additions and 0 deletions
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18
src/video/SDL_surface.c
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@ -1240,6 +1240,15 @@ int SDL_BlitSurfaceUncheckedScaled(SDL_Surface *src, const SDL_Rect *srcrect,
src->format == dst->format && src->format == dst->format &&
!SDL_ISPIXELFORMAT_INDEXED(src->format)) { !SDL_ISPIXELFORMAT_INDEXED(src->format)) {
return SDL_SoftStretch(src, srcrect, dst, dstrect, SDL_SCALEMODE_NEAREST); return SDL_SoftStretch(src, srcrect, dst, dstrect, SDL_SCALEMODE_NEAREST);
} else if (SDL_BITSPERPIXEL(src->format) < 8) {
// Scaling bitmap not yet supported, convert to RGBA for blit
int retval = -1;
SDL_Surface *tmp = SDL_ConvertSurface(src, SDL_PIXELFORMAT_ARGB8888);
if (tmp) {
retval = SDL_BlitSurfaceUncheckedScaled(tmp, srcrect, dst, dstrect, SDL_SCALEMODE_NEAREST);
SDL_DestroySurface(tmp);
}
return retval;
} else { } else {
return SDL_BlitSurfaceUnchecked(src, srcrect, dst, dstrect); return SDL_BlitSurfaceUnchecked(src, srcrect, dst, dstrect);
} }
@ -1251,6 +1260,15 @@ int SDL_BlitSurfaceUncheckedScaled(SDL_Surface *src, const SDL_Rect *srcrect,
src->format != SDL_PIXELFORMAT_ARGB2101010) { src->format != SDL_PIXELFORMAT_ARGB2101010) {
/* fast path */ /* fast path */
return SDL_SoftStretch(src, srcrect, dst, dstrect, SDL_SCALEMODE_LINEAR); return SDL_SoftStretch(src, srcrect, dst, dstrect, SDL_SCALEMODE_LINEAR);
} else if (SDL_BITSPERPIXEL(src->format) < 8) {
// Scaling bitmap not yet supported, convert to RGBA for blit
int retval = -1;
SDL_Surface *tmp = SDL_ConvertSurface(src, SDL_PIXELFORMAT_ARGB8888);
if (tmp) {
retval = SDL_BlitSurfaceUncheckedScaled(tmp, srcrect, dst, dstrect, scaleMode);
SDL_DestroySurface(tmp);
}
return retval;
} else { } else {
/* Use intermediate surface(s) */ /* Use intermediate surface(s) */
SDL_Surface *tmp1 = NULL; SDL_Surface *tmp1 = NULL;