Mercurial > sdl-ios-xcode
diff src/video/SDL_blit.c @ 1052:68f607298ca9
Some work on using accelerated alpha blits with hardware surfaces.
From Stephane Marchesin's fork, don't know who originally wrote it.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 17 Apr 2005 10:40:41 +0000 |
| parents | 9301b429c99f |
| children | b81f54c3963f |
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--- a/src/video/SDL_blit.c Sun Apr 17 10:36:03 2005 +0000 +++ b/src/video/SDL_blit.c Sun Apr 17 10:40:41 2005 +0000 @@ -280,6 +280,17 @@ video->CheckHWBlit(this, surface, surface->map->dst); } } + + /* if an alpha pixel format is specified, we can accelerate alpha blits */ + if (((surface->flags & SDL_HWSURFACE) == SDL_HWSURFACE )&&(current_video->displayformatalphapixel)) + { + if ( (surface->flags & SDL_SRCALPHA) ) + if ( current_video->info.blit_hw_A ) { + SDL_VideoDevice *video = current_video; + SDL_VideoDevice *this = current_video; + video->CheckHWBlit(this, surface, surface->map->dst); + } + } /* Get the blit function index, based on surface mode */ /* { 0 = nothing, 1 = colorkey, 2 = alpha, 3 = colorkey+alpha } */