Path: utzoo!attcan!uunet!cme!anderson
From: anderson@cme.nist.gov (William E. Anderson)
Newsgroups: comp.windows.x
Subject: Problem with GXxor on sun server
Message-ID: <4627@sunspot.cme.nist.gov>
Date: 14 Jun 90 17:06:45 GMT
Organization: National Institute of Standards and Technology
Lines: 21

Please pardon my ignorance but I am trying to port a graphics package
to X11.  This software writes messages to the screen and then unwrites
them using the GXxor logical operation.  The server is a Sun 3/160
running X11R4 patched through fix-11.

On a monochrome display with foreground and background set using
WhitePixel() and BlackPixel() respectively, foreground xor writes
result in no visible text using XDrawString().  If I do a
`XSetForeground(display,gc,backgnd)`, things work.

On a color display, xor writes are blank if the foreground is white
(either with WhitePixel() or via the colormap).  Other colors work
fine.

It appears that xor writes do not work with the foreground set to
white.  I assume I am missing something.
-- 
NAME:   William E. Anderson            TELE: (301) 975-2423
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