NAME

       XIntersectRegion,   XUnionRegion,   XUnionRectWithRegion,   XSubtractRegion,   XXorRegion,
       XOffsetRegion, XShrinkRegion - region arithmetic

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.

       dx
       dy        Specify  the  x  and  y coordinates, which define the amount you want to move or
                 shrink 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.

       The XOffsetRegion function moves the specified region by a specified amount.

       The XShrinkRegion function reduces the specified region by a specified  amount.   Positive
       values shrink the size of the region, and negative values expand the region.

SEE ALSO

       XCreateRegion(3), XDrawRectangle(3), XEmptyRegion(3)
       Xlib - C Language X Interface