XIntersectRegion(3X)                         XIntersectRegion(3X)



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

SYNOPSIS
     XIntersectRegion (sra, srb, dr-return)
     Region sra,srb,dr-return

     XUnionRegion (sra, srb, dr-return)
     Region sra,srb,dr-return

     XUnionRectWithRegion (rectangle, src-region,
     dest-region)
     Rectangle *rectangle;
     Region src-region;
     Region dest-region;

     XSubtractRegion (sra, srb, dr-return)
     Region sra,srb,dr-return

     XXorRegion (sra, srb, dr-return)
     Region sra,srb,dr-return

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

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

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 result in dr-return.

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

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




November, 1990                                                  1

XIntersectRegion(3X)                         XIntersectRegion(3X)



     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.

   Arguments
     These functions accept the following arguments:

     dest-region-return
             Returns the destination region.

     dr-return
             Stores 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 re-
             gion.

     r       Specifies the region.

     rectangle
             Specifies the rectangle.

     sra, srb
             Specify the two regions with which you want to per-
             form the computation.

     src-region
             Specifies the source region to be used.

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

     Xlib - C Language Interface























2                                                  November, 1990