is_planar_bitmap - Man Page
Tells if a bitmap is a planar screen bitmap. Allegro game programming library.
Synopsis
#include <allegro.h>
int is_planar_bitmap(BITMAP *bmp);
Description
Returns TRUE if bmp is a planar (mode-X or Xtended mode) screen bitmap.
See Also
Info
version 4.4.3 Allegro manual