set_difference_blender(3) Allegro manual set_difference_blender(3)NAMEset_difference_blender - Enables a difference blender mode. Allegro
game programming library.
SYNOPSIS
#include <allegro.h>
void set_difference_blender(int r, int g, int b, int a);
DESCRIPTION
Enables a difference blender mode for combining translucent or lit
truecolor pixels. This makes an image which has colours calculated by
the difference between the source and destination colours.
SEE ALSOset_trans_blender(3), drawing_mode(3)Allegro version 4.4.2 set_difference_blender(3)