XSubtractRegion() XSubtractRegion() Name XSubtractRegion - subtract one region from another. Synopsis XSubtractRegion(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 XSubtractRegion() calculates the difference between the two regions specified (sra - srb) and puts the result in dr_return. This function returns a region which contains all parts of sra that are not also in srb. 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(), XUnionRectWithRegion(), XUnionRegion(), XXorRegion(). Xlib - Regions XSubtractRegion()