hpux man page for xunionregion

XUnionRegion()															    XUnionRegion()

Name
  XUnionRegion - compute the union of two regions.

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

Arguments
  sra	    Specify the two regions in which you want to perform the computation.
  srb
  dr_return Returns the result of the computation.

Description
  XUnionRegion()  computes  the  union	of two regions and places the result in dr_return.  The resulting region will contain all the area of
  both the source regions.

  For more information on regions, see Volume One, Chapter 6, Drawing Graphics and Text.

Structures
  Region is a pointer to an opaque structure type.

See Also
  XClipBox(), XCreateRegion(),	XDestroyRegion(),  XEmptyRegion(),  XEqualRegion(),  XIntersectRegion(),  XOffsetRegion(),  XPointInRegion(),
  XPolygonRegion(), XRectInRegion(), XSetRegion(), XShrinkRegion(), XSubtractRegion(), XUnionRectWithRegion(), XXorRegion().

Xlib - Regions															    XUnionRegion()