Photoshop Blend Mode MathBeen working on programmatically blending bitmaps. Below are the macros that I’ve come up, borrowing the some of the formulas from other websites (see sources at the bottom of this post). Channel blending #define ChannelBlend_Normal(B,L) ((uint8)(B)) #define ChannelBlend_Lighten(B,L) ((uint8)((L > B) ? L:B)) #define ChannelBlend_Darken(B,L) ((uint8)((L > B) ? B:L)) #define ChannelBlend_Multiply(B,
