man is_system_bitmap () - Tells if a bitmap is a system bitmap or sub bitmap. Allegro game programming library.
NAME
is_system_bitmap - Tells if a bitmap is a system bitmap or sub bitmap. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
int is_system_bitmap(BITMAP *bmp);
DESCRIPTION
Returns TRUE if bmp is a system bitmap object, or a sub-bitmap of one.