makeacol32(3alleg4) [plan9 man page]

makeacol32(3alleg4)						  Allegro manual					       makeacol32(3alleg4)

NAME

       makeacol32 - Converts an RGBA color into a 32-bit display pixel format. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int makeacol32(int r, int g, int b, int a);

DESCRIPTION

       Converts an RGBA color into a 32-bit display pixel format, which includes an alpha (transparency) value. There are no versions of this rou-
       tine for other color depths, because only the 32-bit format has enough room to store a proper alpha channel. You should only use RGBA  for-
       mat  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.

SEE ALSO

       makeacol(3alleg4), set_alpha_blender(3alleg4), set_write_alpha_blender(3alleg4)

Allegro 							   version 4.4.2					       makeacol32(3alleg4)

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)