DOKK / manpages / debian 11 / allegro5-doc / al_set_separate_blender.3alleg5.en
al_set_separate_blender(3alleg5) al_set_separate_blender(3alleg5)

al_set_separate_blender - Allegro 5 API

#include <allegro5/allegro.h>
void al_set_separate_blender(int op, int src, int dst,

int alpha_op, int alpha_src, int alpha_dst)

Like al_set_blender(3alleg5), 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.

al_set_blender(3alleg5), al_get_blender(3alleg5), al_get_separate_blender(3alleg5)

Allegro reference manual