NAME

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

SYNTAX

       Bool XEmptyRegion(Region r);

       Bool XEqualRegion(Region r1, Region r2);

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

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

ARGUMENTS

       r         Specifies the region.

       r1
       r2        Specify the two regions.

       width
       height    Specify the width and height, which define the rectangle.

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

DESCRIPTION

       The XEmptyRegion function returns True if the region is empty.

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

       The XPointInRegion function returns True if the point (x, y) is contained in the region r.

       The XRectInRegion function returns  RectangleIn  if  the  rectangle  is  entirely  in  the
       specified  region,  RectangleOut if the rectangle is entirely out of the specified region,
       and RectanglePart if the rectangle is partially in the specified region.

SEE ALSO

       XCreateRegion(3), XIntersectRegion(3)
       Xlib - C Language X Interface