XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion - determine if regions are empty or equal

r         Specifies the region.

       r1r2        Specify the two regions.

       widthheight    Specify the width and height, which define the rectangle.

       xy         Specify  the  x  and y coordinates, which define the point or the coordinates of the upper-left
                 corner of the rectangle.

       The XEmptyRegion function returns True if the region is empty.

       The XEqualRegion function returns True if the two regions have the same offset, size, and shape.

       The XPointInRegion function returns True if the point (x, y) is contained in the region r.

       The XRectInRegion function returns RectangleIn if the rectangle is  entirely  in  the  specified  region,
       RectangleOut if the rectangle is entirely out of the specified region, and RectanglePart if the rectangle
       is partially in the specified region.

       XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion - determine if regions are empty or equal

XCreateRegion(3), XIntersectRegion(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                                  XEmptyRegion(3)

       Bool XEmptyRegion(Region r);

       Bool XEqualRegion(Region r1, Region r2);

       Bool XPointInRegion(Region r, int x, int y);

       int XRectInRegion(Region r, int x, int y, unsigned int width, unsigned int height);