mirrors/SDL
1
0
Fork 0
mirror of https://github.com/libsdl-org/SDL.git synced 2026-01-20 20:00:42 +00:00
Code Issues Packages Projects Releases Wiki Activity

Support format conversion and YUV surfaces in SDL_SoftStretch()

Browse Source 
These are slow paths, but at least they'll do the right thing now.

Fixes https://github.com/libsdl-org/SDL/issues/9496
This commit is contained in:
Sam Lantinga
2024-07-06 05:32:31 -07:00
parent 4ba2e9f4f4
commit e52603ac8f
1 changed files with 45 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

46
src/video/SDL_stretch.c
View File

@@ -35,9 +35,53 @@ int SDL_SoftStretch(SDL_Surface *src, const SDL_Rect *srcrect,
SDL_Rect full_src;
SDL_Rect full_dst;
if (!src) {
return SDL_InvalidParamError("src");
}
if (!dst) {
return SDL_InvalidParamError("dst");
}
if (src->format->format != dst->format->format) {
return SDL_SetError("Only works with same format surfaces");
// Slow!
SDL_Surface *src_tmp = SDL_ConvertSurfaceFormat(src, dst->format->format);
if (!src_tmp) {
return -1;
}
ret = SDL_SoftStretch(src_tmp, srcrect, dst, dstrect, scaleMode);
SDL_DestroySurface(src_tmp);
return ret;
}
if (SDL_ISPIXELFORMAT_FOURCC(src->format->format)) {
// Slow!
if (!dstrect) {
full_dst.x = 0;
full_dst.y = 0;
full_dst.w = dst->w;
full_dst.h = dst->h;
dstrect = &full_dst;
}
SDL_Surface *src_tmp = SDL_ConvertSurfaceFormat(src, SDL_PIXELFORMAT_XRGB8888);
SDL_Surface *dst_tmp = SDL_CreateSurface(dstrect->w, dstrect->h, SDL_PIXELFORMAT_XRGB8888);
if (src_tmp && dst_tmp) {
ret = SDL_SoftStretch(src_tmp, srcrect, dst_tmp, NULL, scaleMode);
if (ret == 0) {
SDL_Colorspace dst_colorspace = SDL_COLORSPACE_UNKNOWN;
SDL_GetSurfaceColorspace(dst, &dst_colorspace);
SDL_ConvertPixelsAndColorspace(dstrect->w, dstrect->h,
dst_tmp->format->format, SDL_COLORSPACE_SRGB, 0,
dst_tmp->pixels, dst_tmp->pitch,
dst->format->format, dst_colorspace, SDL_GetSurfaceProperties(dst),
(Uint8 *)dst->pixels + dstrect->y * dst->pitch + dstrect->x * dst->format->bytes_per_pixel, dst->pitch);
}
} else {
ret = -1;
}
SDL_DestroySurface(src_tmp);
SDL_DestroySurface(dst_tmp);
return ret;
}
if (scaleMode != SDL_SCALEMODE_NEAREST && scaleMode != SDL_SCALEMODE_LINEAR && scaleMode != SDL_SCALEMODE_BEST) {