NAME

       getr_depth, getg_depth, getb_depth, geta_depth - Extract a color component from a color in
       a specified pixel format. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       int getr_depth(int color_depth, int c);

       int getg_depth(int color_depth, int c);

       int getb_depth(int color_depth, int c);

       int geta_depth(int color_depth, int c);

DESCRIPTION

       Given a color in the format being used by  the  specified  color  depth,  these  functions
       extract  one  of the red, green, blue, or alpha components (ranging 0-255). The alpha part
       is only meaningful for 32-bit pixels.  Example:

          int r, g, b, color_value, bpp;

          bpp = bitmap_color_depth(bitmap);
          color_value = getpixel(bitmap, 100, 100);
          r = getr_depth(bpp, color_value);
          g = getg_depth(bpp, color_value);
          b = getb_depth(bpp, color_value);

SEE ALSO

       getr(3alleg4),         getr8(3alleg4),         geta32(3alleg4),          makecol(3alleg4),
       set_color_depth(3alleg4), exlights(3alleg4)