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set_difference_blender(3)       Allegro manual       set_difference_blender(3)

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)

Allegro                          version 4.4.2       set_difference_blender(3)