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set_add_blender(3)              Allegro manual              set_add_blender(3)

NAME
       set_add_blender - Enables an additive blender mode. Allegro game
       programming library.

SYNOPSIS
       #include <allegro.h>

       void set_add_blender(int r, int g, int b, int a);

DESCRIPTION
       Enables an additive blender mode for combining translucent or lit
       truecolor pixels.

SEE ALSO
       set_trans_blender(3), drawing_mode(3)

Allegro                          version 4.4.2              set_add_blender(3)