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is_screen_bitmap(3)             Allegro manual             is_screen_bitmap(3)

NAME
       is_screen_bitmap - Tells if a bitmap is the screen bitmap or sub
       bitmap. Allegro game programming library.

SYNOPSIS
       #include <allegro.h>

       int is_screen_bitmap(BITMAP *bmp);

DESCRIPTION
       Returns TRUE if bmp is the screen bitmap, or a sub-bitmap of the
       screen.

SEE ALSO
       screen(3), create_sub_bitmap(3)

Allegro                          version 4.4.2             is_screen_bitmap(3)