Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ubvax!igor!drk
From: drk@igor.Rational.COM (David R. Kaelbling)
Newsgroups: comp.windows.x
Subject: How to make XClearRegion?
Keywords: XClearArea,Regions
Message-ID: <521@igor.Rational.COM>
Date: 2 Feb 89 21:26:18 GMT
Organization: Rational, Santa Clara, CA
Lines: 18


I want to use XClearRegion.  Since it doesn't exist, I'm soliciting
suggestions on a good way to implement it myself on top of X.  

There is no way I can see to accurately query the contents of a Region
(i.e., I can't find anything which decomposes a Region into Rects
again), so I abandoned the simple "iterate over the contents and call
XClearArea" approach.

I'm looking at to creating a special GC for use with XSetRegion, but
it isn't immediately obvious to me where to get all of information
necessary (where do I get the window backgroud pixel/pixmap)?

This doesn't seem like too unusal a thing to want, so I'm assuming I
just missed the relevant section of TFM.  Can anyone give me a clue?

	Thanks,
	David

David Kaelbling                                       (408) 496-3600
c/o Rational; 3320 Scott Boulevard; Santa Clara, CA       95054-3197
drk@Rational.COM, drk@igor.uu.net, ...!{uunet,ubvax,amdcad}!igor!drk