Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!brutus.cs.uiuc.edu!wuarchive!wugate!wupost!kuhub.cc.ukans.edu!heping
From: HEPING@kuhub.cc.ukans.edu
Newsgroups: comp.windows.x
Subject: X region and its data structure
Message-ID: <7133@kuhub.cc.ukans.edu>
Date: 31 Jul 89 21:18:55 GMT
Organization: University of Kansas Academic Computing Services
Lines: 16

Questions:
1. What is the data structure for X region? 
2. I can create a rectangle or polygon region. How can I creat an ellipse
   region? Do I have to find the edge points for the ellipsefirst and then
   use XPlolygonRegion?
3. Once a region is set, can I get the region pointer? I mean that I don't
   know the clipregion and I don't care, but I want to set a new clipmask
   region by intersecting the current clipmask region with a third region.
4. It is possible to create an arbitrary region by creating a bitmap first
   But when I set this region, the old clipmask region will be destroyed.
   Is there a way to keep the old region for later use? ( it is similar to 3)

Any comments will be welcome and appreciated.


Phil