Mercurial > sdl-ios-xcode
changeset 3625:83910f4c373f
Merged r4992:4993 from branches/SDL-1.2: increased alpha blend accuracy.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 10 Jan 2010 06:18:39 +0000 |
| parents | 9b1af1049f66 |
| children | 596468a8459e |
| files | src/video/SDL_blit.h |
| diffstat | 1 files changed, 3 insertions(+), 3 deletions(-) [+] |
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--- a/src/video/SDL_blit.h Sun Jan 10 05:39:46 2010 +0000 +++ b/src/video/SDL_blit.h Sun Jan 10 06:18:39 2010 +0000 @@ -444,9 +444,9 @@ /* Blend the RGB values of two Pixels based on a source alpha value */ #define ALPHA_BLEND(sR, sG, sB, A, dR, dG, dB) \ do { \ - dR = ((((int)(sR-dR)*(int)A)/255)+dR); \ - dG = ((((int)(sG-dG)*(int)A)/255)+dG); \ - dB = ((((int)(sB-dB)*(int)A)/255)+dB); \ + dR = (((((int)(sR-dR)*((int)A))+255)/255)+dR); \ + dG = (((((int)(sG-dG)*((int)A))+255)/255)+dG); \ + dB = (((((int)(sB-dB)*((int)A))+255)/255)+dB); \ } while(0)