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)