set_clip_state - Turns on or off the clipping of a bitmap. Allegro game
programming library.
#include <allegro.h>
void set_clip_state(BITMAP *bitmap, int state)
Turns on (if state is non-zero) or off (if state is zero) clipping for the
specified bitmap. Turning clipping off may slightly speed up some drawing
operations (usually a negligible difference, although every little helps) but
will result in your program dying a horrible death if you try to draw beyond
the edges of the bitmap.
set_clip_rect(3), get_clip_rect(3), add_clip_rect(3),
get_clip_state(3)