man is_video_bitmap (3): Tells if a bitmap is a screen bitmap, video memory or sub bitmap. Allegro game programming library.

is_video_bitmap(3) Tells if a bitmap is a screen bitmap, video memory or sub bitmap. Allegro game programming library.

SYNOPSIS

#include <allegro.h>

int is_video_bitmap(BITMAP *bmp);

Returns TRUE if bmp is the screen bitmap, a video memory bitmap, or a sub-bitmap of either.