Tells if two bitmaps describe the same drawing surface. allegro game programming library.
#include <allegro.h>
int is_same_bitmap(BITMAP *bmp1, BITMAP *bmp2);
Returns TRUE if the two bitmaps describe the same drawing surface, ie. the pointers are equal, one is a sub-bitmap of the other, or they are both sub-bitmaps of a common parent.
create_sub_bitmap(3alleg4)