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From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How does one save/restore clipping?
Message-ID: <22533@well.sf.ca.us>
Date: 10 Jan 91 06:58:30 GMT
References: <47697@apple.Apple.COM> <22461@well.sf.ca.us> <1991Jan6.225428.10958@Neon.Stanford.EDU>
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 18

In article <1991Jan6.225428.10958@Neon.Stanford.EDU> kaufman@Neon.Stanford.EDU (Marc T. Kaufman) writes:
_>In article <22461@well.sf.ca.us> oster@well.sf.ca.us (David Phillip Oster) writes:
_>.So that if the window is partially obscured by another, the visRgn will be
_>.taken into account, by ClippedOff().
_>
_>I am under the impression that all drawing is AUTOMATICALLY clipped to the
_>visRgn.  My preference is to set the outermost clip region to portRect, to
_>keep it rectangular for faster checking.  If visRgn is complex you may have
_>to endure more complex checking (i.e. checking essentially the same region
_>twice) when drawing in the visible area.
_>

The DRAWING is automaticvally clipped, but I want to avoid wasting the CPU
time to call routines that won't do anything.

-- 
-- David Phillip Oster - At least the government doesn't make death worse.
-- oster@well.sf.ca.us = {backbone}!well!oster