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From: lsr@Apple.COM (Larry Rosenstein)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Drawing in the menu bar (AGAIN)
Message-ID: <9751@goofy.Apple.COM>
Date: 14 Aug 90 22:23:04 GMT
References: <1816@mountn.dec.com> <2902@isc-br.ISC-BR.COM> <1990Aug14.031613.18374@agate.berkeley.edu>
Organization: Apple Computer, Inc.
Lines: 14

In article <1990Aug14.031613.18374@agate.berkeley.edu> lippin@math.berkeley.edu writes:

>Interrupt Time."  You can't draw at interrupt time because QuickDraw
>isn't reentrant.  It forgets, for example, whether the cursor is

Plus, a grafPort contains several handles (clipRgn, visRgn, ...) which
QuickDraw uses and aren't guaranteed to be valid at interrupt level (unless
locked).

-- 
		 Larry Rosenstein,  Object Specialist
 Apple Computer, Inc.  20525 Mariani Ave, MS 46-B  Cupertino, CA 95014
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