Mercurial > sdl-ios-xcode
diff src/video/SDL_video.c @ 2912:1d50666ed3d5
Fixed clipping source rect to match destination rect clipping
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 23 Dec 2008 04:51:36 +0000 |
| parents | 27d8b12e0e8e |
| children | bd518fc76f28 |
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--- a/src/video/SDL_video.c Tue Dec 23 02:39:03 2008 +0000 +++ b/src/video/SDL_video.c Tue Dec 23 04:51:36 2008 +0000 @@ -2205,6 +2205,19 @@ if (!SDL_IntersectRect(dstrect, &real_dstrect, &real_dstrect)) { return 0; } + /* Clip srcrect by the same amount as dstrect was clipped */ + if (dstrect->w != real_dstrect.w) { + int deltax = (real_dstrect.x - dstrect->x); + int deltaw = (real_dstrect.w - dstrect->w); + real_srcrect.x += (deltax * dstrect->w) / real_srcrect.w; + real_srcrect.w += (deltaw * dstrect->w) / real_srcrect.w; + } + if (dstrect->h != real_dstrect.h) { + int deltay = (real_dstrect.y - dstrect->y); + int deltah = (real_dstrect.h - dstrect->h); + real_srcrect.y += (deltay * dstrect->h) / real_srcrect.h; + real_srcrect.h += (deltah * dstrect->h) / real_srcrect.h; + } } return renderer->RenderCopy(renderer, texture, &real_srcrect,