plan9 man page for makeacol

makeacol(3alleg4)						  Allegro manual						 makeacol(3alleg4)

NAME
       makeacol, makeacol_depth - Converts RGBA colors into display dependent pixel formats. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int makeacol(int r, int g, int b, int a);

       int makeacol_depth(int color_depth, int r, int g, int b, int a);

DESCRIPTION
       Convert	RGBA  colors into display dependent pixel formats. In anything less than a 32-bit mode, these are the same as calling makecol() or
       makecol_depth(), but by using these routines it is possible to create 32-bit color values that contain a true 8	bit  alpha  channel  along
       with   the  red,  green,  and  blue  components.  You  should  only  use  RGBA  format  colors  as  the	input  to  draw_trans_sprite()	or
       draw_trans_rle_sprite() after calling set_alpha_blender(), rather than drawing them directly to the screen.

RETURN VALUE
       Returns the requested RGBA quadruplet.

SEE ALSO
       makecol(3alleg4), makecol_depth(3alleg4), set_alpha_blender(3alleg4), set_write_alpha_blender(3alleg4), exrotscl(3alleg4)

Allegro 							   version 4.4.2						 makeacol(3alleg4)