man VIRTUAL_W (3): Global define to obtain the virtual size of the screen. Allegro game programming library.

Other Alias

VIRTUAL_H

SYNOPSIS

#include <allegro.h>

#define VIRTUAL_W;

#define VIRTUAL_H;

Global defines that return the width and height of the virtual screen, or zero if the screen has not been initialised yet. Example:

   char buf[100];
   ...
   uszprintf(buf, sizeof(buf),
             "The virtual screen size is %d x %d pixels",
             SCREEN_W, SCREEN_H);