suse man page for add_clip_rect

add_clip_rect(3alleg4)                                            Allegro manual                                            add_clip_rect(3alleg4)

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

SYNOPSIS
       #include <allegro.h>

       void add_clip_rect(BITMAP *bitmap, int x1, int y1, int x2, int y2);

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

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

Allegro                                                            version 4.4.2                                            add_clip_rect(3alleg4)