XCreateRegion, XSetRegion, XDestroyRegion - create or destroy regions

display   Specifies the connection to the X server.

       gc        Specifies the GC.

       r         Specifies the region.

       The XCreateRegion function creates a new empty region.

       The  XSetRegion  function  sets the clip-mask in the GC to the specified region.  The region is specified
       relative to the drawable's origin.  The resulting GC clip origin is implementation-dependent.  Once it is
       set in the GC, the region can be destroyed.

       The XDestroyRegion function deallocates the storage associated with a specified region.

       XCreateRegion, XSetRegion, XDestroyRegion - create or destroy regions

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

X Version 11                                      libX11 1.8.12                                 XCreateRegion(3)

       Region XCreateRegion(void);

       int XSetRegion(Display *display, GC gc, Region r);

       int XDestroyRegion(Region r);