XEmptyRegion(3X)                                 XEmptyRegion(3X)



NAME
     XEmptyRegion, XEqualRegion, XPointINRegion, XRectInRegion  -
     determine if regions are empty or equal

SYNOPSIS
     int XEmptyRegion (r)
     Region r;

     int XEqualRegion (r1,r2)
     Region r1,r2;

     Bool XPointInRegion(r, x, y)
     Region r;
     int x, y;

     int XRectInRegion(r, x, y, width, height)
     Region r;
     int x, y;
     unsigned int width, height;

DESCRIPTION
     The XEmptyRegion function returns nonzero if the specified
     region is empty.

     The XEqualRegion function returns nonzero if two regions
     have the same offset, size, and shape.

   Arguments
     These functions accept the following arguments:

     r       Specifies the region.

     r1, r2  Specify the two regions.

     width, height
             Specify the width and height, which define the rec-
             tangle.

     x, y    Specify the x and y coordinates, which define the
             point or the coordinates of the upper-left corner of
             the rectangle.

     The XRectInRegion function returns 1 if the rectangle is en-
     tirely in the specified region, 0 if the rectangle is en-
     tirely out of the specified region, and 2 if the rectangle
     is partially in the specified region.

SEE ALSO
     XCreateRegion(3X), XIntersectRegion(3X)

     Xlib - C Language Interface





November, 1990                                                  1