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Really fixed blit issue for capehill

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This commit is contained in:
Sam Lantinga 2017-01-07 16:51:48 -08:00
parent e9c2dcdae8
commit e25f4e507d
1 changed files with 6 additions and 6 deletions
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12
src/video/SDL_blit.h
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@ -443,18 +443,18 @@ do { \
/* Blend the RGB values of two pixels with an alpha value */
#define ALPHA_BLEND_RGB(sR, sG, sB, A, dR, dG, dB) \
do { \
dR = (Uint8)((((int)(sR-dR)*A)/255)+dR); \
dG = (Uint8)((((int)(sG-dG)*A)/255)+dG); \
dB = (Uint8)((((int)(sB-dB)*A)/255)+dB); \
dR = (Uint8)((((int)(sR-dR)*(int)A)/255)+dR); \
dG = (Uint8)((((int)(sG-dG)*(int)A)/255)+dG); \
dB = (Uint8)((((int)(sB-dB)*(int)A)/255)+dB); \
} while(0)
/* Blend the RGBA values of two pixels */
#define ALPHA_BLEND_RGBA(sR, sG, sB, sA, dR, dG, dB, dA) \
do { \
dR = (Uint8)((((int)(sR-dR)*sA)/255)+dR); \
dG = (Uint8)((((int)(sG-dG)*sA)/255)+dG); \
dB = (Uint8)((((int)(sB-dB)*sA)/255)+dB); \
dR = (Uint8)((((int)(sR-dR)*(int)sA)/255)+dR); \
dG = (Uint8)((((int)(sG-dG)*(int)sA)/255)+dG); \
dB = (Uint8)((((int)(sB-dB)*(int)sA)/255)+dB); \
dA = (Uint8)((int)sA+dA-((int)sA*dA)/255); \
} while(0)