Path: utzoo!utgpu!watmath!clyde!att!rutgers!mailrus!ames!pasteur!postgres!anton
From: anton@postgres.uucp (Jeff Anton)
Newsgroups: comp.windows.x
Subject: unexpose events?
Message-ID: <7978@pasteur.Berkeley.EDU>
Date: 3 Dec 88 22:18:43 GMT
Sender: news@pasteur.Berkeley.EDU
Reply-To: anton@postgres.UUCP (Jeff Anton)
Organization: Postgres Research Group, UC Berkeley
Lines: 10

I'm writing a program that spends a lot of time computing each pixel
of a window.  What I would like to do is to have my program be informed
when its window becomes obscured in a certain region so I don't have
to waste computrons on unexposed window regions.  The best I can figure
out is to examine all the windows on the display to determine what I should
draw on my one window.  A lot of work that an application should not have
to do in my opinion.  With backing store I might as well go ahead and
draw everything, but I would really perfer to present images to the
user as soon as possible.  The visibility events are of little use to me.
					Jeff Anton