linux man page for xor_mode

xor_mode(3alleg4)						  Allegro manual						 xor_mode(3alleg4)

NAME
       xor_mode - Shortcut for toggling xor drawing mode on and off. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       void xor_mode(int on);

DESCRIPTION
       This  is  a shortcut for toggling xor drawing mode on and off. Calling xor_mode(TRUE) is equivalent to drawing_mode(DRAW_MODE_XOR, NULL, 0,
       0).  Calling xor_mode(FALSE) is equivalent to drawing_mode(DRAW_MODE_SOLID, NULL, 0, 0).

SEE ALSO
       drawing_mode(3alleg4), exspline(3alleg4), exupdate(3alleg4)

Allegro 							   version 4.4.2						 xor_mode(3alleg4)