Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!snorkelwacker!bloom-beacon!EXPO.LCS.MIT.EDU!rws
From: rws@EXPO.LCS.MIT.EDU (Bob Scheifler)
Newsgroups: comp.windows.x
Subject: Re: XSetWindowBackgroundPixmap?
Message-ID: <9003211959.AA03884@expire.lcs.mit.edu>
Date: 21 Mar 90 19:59:13 GMT
References: <5168@helios.ee.lbl.gov>
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 21


    The Xlib documentation provided in the X source distribution is not
    explicit either.

You are wrong.  The references I gave were equally valid for the R4
(and also R3) MIT documents, not just the Digital Press version (which
is really just a copy-edit cleanup of the MIT documents).  You really
should learn to use the documentation (that's why I didn't directly
answer the question in the first place), but just to prove you wrong,
I will bother to quote from the MIT Xlib document where I referenced:

If you later draw into the pixmap used for the background,
what happens is undefined because the
X implementation is free to make a copy of the pixmap or
to use the same pixmap.

and from the MIT Protocol document where I referenced:

Subsequent drawing into the background or border pixmap has an
undefined effect on the window state.
The server might or might not make a copy of the pixmap.