Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!yale!mintaka!bloom-beacon!LARRY.MCRCIM.MCGILL.EDU!mouse
From: mouse@LARRY.MCRCIM.MCGILL.EDU
Newsgroups: comp.windows.x
Subject: Re:  GXxor problems on Xqvss
Message-ID: <9011112344.AA21683@Larry.McRCIM.McGill.EDU>
Date: 11 Nov 90 23:44:58 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 19

>>> Some X programs (that use special GC's like xor) do not display
>>> correct on my Xqvss server.  When I change display to a Xsun server
>>> on a SPARC (also form the mit tape) but the client is still running
>>> on the same, original host, the programs display fine.
>> This could be the common XOR mistake.  Is the qvss a color server
>> and the SPARC a monochrome?  If so, [...].
> Sorry to rain on your solution, but the qvss is a monochrome server.

Hmmm.  Okay then, I have another possibility...

Do the qvss and Sun servers use different values for black and white?
It's possible the program is doing xor with a foreground value set to
(say) black, determined experimentally by the author.  When transported
to a server that has (say) black being 0 instead of 1, it breaks....

					der Mouse

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