man is_same_bitmap () - Tells if two bitmaps describe the same drawing surface. Allegro game programming library.
NAME
is_same_bitmap - Tells if two bitmaps describe the same drawing surface. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int is_same_bitmap(BITMAP *bmp1, BITMAP *bmp2);
DESCRIPTION
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.