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)