XPolygonRegion, XClipBox - generate regions

fill_rule Specifies  the  fill-rule  you  want  to set for the specified GC.  You can pass EvenOddRule or
                 WindingRule.

       n         Specifies the number of points in the polygon.

       points    Specifies an array of points.

       r         Specifies the region.

       rect_return
                 Returns the smallest enclosing rectangle.

       The XPolygonRegion function returns a region for the  polygon  defined  by  the  points  array.   For  an
       explanation of fill_rule, see XCreateGC.

       The XClipBox function returns the smallest rectangle enclosing the specified region.

       XPolygonRegion, XClipBox - generate regions

XCreateGC(3), XDrawPoint(3), XDrawRectangle(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                                XPolygonRegion(3)

       Region XPolygonRegion(XPoint points[], int n, int fill_rule);

       int XClipBox(Region r, XRectangle *rect_return);