1 #ifndef U_BLEND_H 2 #define U_BLEND_H 3 4 #include "pipe/p_state.h" 5 6 /** 7 * When faking RGBX render target formats with RGBA ones, the blender is still 8 * supposed to treat the destination's alpha channel as 1 instead of the 9 * garbage that's there. Return a blend factor that will take that into 10 * account. 11 */ 12 static inline int 13 util_blend_dst_alpha_to_one(int factor) 14 { 15 switch (factor) { 16 case PIPE_BLENDFACTOR_DST_ALPHA: 17 return PIPE_BLENDFACTOR_ONE; 18 case PIPE_BLENDFACTOR_INV_DST_ALPHA: 19 return PIPE_BLENDFACTOR_ZERO; 20 default: 21 return factor; 22 } 23 } 24 25 #endif /* U_BLEND_H */ 26
