From: Iris_-_Smith@cup.portal.com
Subject: Re: Drawing Lines (inverse/xor)
Organization: The Portal System (TM)
  <1993Apr21.111919.5281@alf.uib.no> <DRAND.93Apr21114830@spinner.osf.org>
Lines: 3

You can also set the Foreground to the XOR of the foreground and background
colors:  XSetForeground(..., fg ^ bg);    This works great for me (at least
with TrueColor visuals).
