getr

getr(3alleg4)                    Allegro manual                    getr(3alleg4)



NAME
       getr, getg, getb, geta - Extract a color component from the current pixel
       format. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>


       int getr(int c);

       int getg(int c);

       int getb(int c);

       int geta(int c);

DESCRIPTION
       Given a color in the format being used by the current video mode, these
       functions extract one of the red, green, blue, or alpha components
       (ranging 0-255), calling the preceding 8, 15, 16, 24, or 32-bit get
       functions as appropriate. The alpha part is only meaningful for 32-bit
       pixels. Example:

          int r, g, b, color_value;

          color_value = getpixel(screen, 100, 100);
          r = getr(color_value);
          g = getg(color_value);
          b = getb(color_value);


SEE ALSO
       getr8(3alleg4), getr_depth(3alleg4), makecol(3alleg4),
       set_color_depth(3alleg4), exalpha(3alleg4)



Allegro                           version 4.4.3                    getr(3alleg4)