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
 Redistribution and use in source and binary forms, with or without modification, for any purpose, are permitted, except as may be restricted by original copyright holders, provided that the following conditions are met:
 • Redistributions of source code must retain the above copyright notice, all earlier copyright notices of others, this list of conditions and the following disclaimer.
 • Redistributions in binary form must reproduce the above copyright notice, all earlier copyright notices of others, this list of conditions and the following disclaimer, in the documentation, and/or other materials provided with the distribution.
 DISCLAIMER
 This software is provided free of charge with no support.
 This software is provided in source format; You are advised to examine it and understand it, before putting it to use.
 This software uses only algorithms and coding techniques that are available to the public in the open literature. You are however, advised to make your own determination of legality, for your intended use.
 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.
 In no event shall the Author or Contributors, or their Agents, be liable for any direct, indirect, incidental, special, exemplary, or consequential damages (including, but not limited to, procurement of substitute goods or services; loss of use, data, or profits; or business interruption) however caused and on any theory of liability, whether in contract, strict liability, or tort (including negligence or otherwise) arising in any way out of the use of this software, even if advised of the possibility of such damage.