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

       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).

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

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

Allegro                                           version 4.4.3                                xor_mode(3alleg4)

#include<allegro.h>voidxor_mode(inton);