Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!decwrl!pa.dec.com!wsl.dec.com!klee
From: klee@wsl.dec.com (Ken Lee)
Newsgroups: comp.windows.x
Subject: Re: negative Xlib drawing coordinates
Message-ID: <1991Apr18.110047@wsl.dec.com>
Date: 18 Apr 91 18:00:47 GMT
References: <3644@lamont.ldgo.columbia.edu>
Sender: news@pa.dec.com (News)
Reply-To: klee@wsl.dec.com
Organization: DEC Western Software Laboratory
Lines: 17

In article <3644@lamont.ldgo.columbia.edu>, rbd@lamont.ldgo.columbia.edu (roger davis) writes:
|> Is it safe to use negative pixel coordinates as arguments to
|> Xlib drawing routines, e.g.,
|> 
|> 	XDrawLine(dpy, drw, gc, -20, -80, 100, 200);
|> 
|> and does Xlib or the server properly clip such operations at
|> the boundaries of the drawable? Is this behavior well-defined
|> for all server/Xlib implementations?

Yes.  Yes.  It is well defined for non-buggy implementations.

-- 
Ken Lee
DEC Western Software Laboratory, Palo Alto, Calif.
Internet: klee@wsl.dec.com
uucp: uunet!decwrl!klee