add_clip_rect - Intersects a bitmap's clipping rectangle with the given area. Allegro game programming

       Sets the clipping rectangle of the specified bitmap as the intersection of its current clipping rectangle
       and the rectangle described by the four coordinates.

       add_clip_rect  -  Intersects  a bitmap's clipping rectangle with the given area. Allegro game programming
       library.

set_clip_rect(3alleg4), get_clip_rect(3alleg4), set_clip_state(3alleg4), get_clip_state(3alleg4)

Allegro                                           version 4.4.3                           add_clip_rect(3alleg4)

#include<allegro.h>voidadd_clip_rect(BITMAP*bitmap,intx1,inty1,intx2,inty2);