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(3alleg), makecol_depth(3alleg), set_alpha_blender(3alleg),
set_write_alpha_blender(3alleg)