set_difference_blender
Section: Allegro manual (3)
Updated: version 4.2.2
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NAME
set_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 ALSO
set_trans_blender(3),
drawing_mode(3)