PSGr is a awt.Graphics subclass that images to PostScript.
 Copyright (C) 1996 E.J. Friedman-Hill and Sandia National Labs
 Version 1.0
 Author Ernest Friedman-Hill
 ejfried@ca.sandia.gov
 Right to unrestricted personal and commercial use is granted if this acknowledgement is given on product or packing materials
 This software is provided by the Author and Contributors AS IS'' and any express or implied warranties, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose, are disclaimed.