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From: grunwald@FOOBAR.COLORADO.EDU
Newsgroups: comp.windows.x
Subject: Re: ghostscript2.0 (was Re: fix to font cacheing in ralpage postscript viewer)
Message-ID: <9009201600.AA28327@foobar.Colorado.EDU>
Date: 20 Sep 90 16:00:24 GMT
References: <9009201038.AA05265@Larry.McRCIM.McGill.EDU>
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Reply-To: grunwald@foobar.colorado.edu
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right, 'gs' does this to avoid exposure events, and you could probably
increase display speed 2x by drawing to the pixmap and then displaying
that.


In texx, I attempted to keep track of exposure events to determine if
the window was exposed - if it wasn't, you drew to the window (end
eventually copied to the pixmap) else you drew to the pixmap and then
then window. Very messy, and it would fail if you obscured it in
mid display.

Having an explicit backing store would be very useful in these cases.