Mercurial > sdl-ios-xcode
diff src/video/SDL_yuv.c @ 1643:51038e80ae59
More general fix for bug #189
The clipping is done at a higher level, and the low level functions are
passed clipped rectangles. Drivers which don't support source clipping
have not been changed, so the image will be squished instead of clipped,
but at least they will no longer crash when the destination rect was out
of bounds.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 17 Apr 2006 06:47:23 +0000 |
| parents | d910939febfa |
| children | 782fd950bd46 9a7c62bbc8b3 |
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--- a/src/video/SDL_yuv.c Mon Apr 17 05:38:33 2006 +0000 +++ b/src/video/SDL_yuv.c Mon Apr 17 06:47:23 2006 +0000 @@ -75,7 +75,55 @@ int SDL_DisplayYUVOverlay(SDL_Overlay *overlay, SDL_Rect *dstrect) { - return overlay->hwfuncs->Display(current_video, overlay, dstrect); + SDL_Rect src, dst; + int srcx, srcy, srcw, srch; + int dstx, dsty, dstw, dsth; + + /* Clip the rectangle to the screen area */ + srcx = 0; + srcy = 0; + srcw = overlay->w; + srch = overlay->h; + dstx = dstrect->x; + dsty = dstrect->y; + dstw = dstrect->w; + dsth = dstrect->h; + if ( dstx < 0 ) { + srcw += (dstx * overlay->w) / dstrect->w; + dstw += dstx; + srcx -= (dstx * overlay->w) / dstrect->w; + dstx = 0; + } + if ( (dstx+dstw) > current_video->screen->w ) { + int extra = (dstx+dstw - current_video->screen->w); + srcw -= (extra * overlay->w) / dstrect->w; + dstw -= extra; + } + if ( dsty < 0 ) { + srch += (dsty * overlay->h) / dstrect->h; + dsth += dsty; + srcy -= (dsty * overlay->h) / dstrect->h; + dsty = 0; + } + if ( (dsty+dsth) > current_video->screen->h ) { + int extra = (dsty+dsth - current_video->screen->h); + srch -= (extra * overlay->h) / dstrect->h; + dsth -= extra; + } + if ( srcw <= 0 || srch <= 0 || + srch <= 0 || dsth <= 0 ) { + return 0; + } + /* Ugh, I can't wait for SDL_Rect to be int values */ + src.x = srcx; + src.y = srcy; + src.w = srcw; + src.h = srch; + dst.x = dstx; + dst.y = dsty; + dst.w = dstw; + dst.h = dsth; + return overlay->hwfuncs->Display(current_video, overlay, &src, &dst); } void SDL_FreeYUVOverlay(SDL_Overlay *overlay)