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is_same_bitmap(3)               Allegro manual               is_same_bitmap(3)

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.

SEE ALSO
       create_sub_bitmap(3)

Allegro                          version 4.4.2               is_same_bitmap(3)