SYNTAX

       int XIntersectRegion(Region sra, Region srb, Region dr_return);

       int XUnionRegion(Region sra, Region srb, Region dr_return);

       int XUnionRectWithRegion(XRectangle *rectangle, Region src_region,
              Region dest_region_return);

       int XSubtractRegion(Region sra, Region srb, Region dr_return);

       int XXorRegion(Region sra, Region srb, Region dr_return);

       int XOffsetRegion(Region r, int dx, int dy);

       int XShrinkRegion(Region r, int dx, int dy);

ARGUMENTS

       dest_region_return
                 Returns the destination region.

       dr_return Returns the result of the computation.  ds Dy move or shrink

       dx
       dy        Specify the x and y coordinates, which define the amount you
                 want to  the specified region.

       r         Specifies the region.

       rectangle Specifies the rectangle.

       sra
       srb       Specify the two regions with which you want to perform the
                 computation.

       src_region
                 Specifies the source region to be used.

DESCRIPTION

       The XIntersectRegion function computes the intersection of two regions.

       The XUnionRegion function computes the union of two regions.

       The XUnionRectWithRegion function updates the destination region from a
       union of the specified rectangle and the specified source region.

       The XSubtractRegion function subtracts srb from sra and stores the
       results in dr_return.

       The XXorRegion function calculates the difference between the union and
       intersection of two regions.