al_set_separate_blender3
Allegro 5 api
Usage
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#include <allegro5/allegro.h> void al_set_separate_blender(int op, int src, int dst, int alpha_op, int alpha_src, int alpha_dst)
Overview
Like al_set_blender(3), but allows specifying a separate blending operation for the alpha channel. This is useful if your target bitmap also has an alpha channel and the two alpha channels need to be combined in a different way than the color components.