Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Path: utzoo!mnetor!seismo!cmcl2!husc6!panda!genrad!decvax!decwrl!hplabs!sdcrdcf!burdvax!psuvax1!psuvm.bitnet!dmb
From: DMB@PSUVMA.BITNET
Newsgroups: comp.sys.mac
Subject: Offscreen bitmaps/Copybits and maskrgns
Message-ID: <8719DMB@PSUVMA>
Date: Tue, 25-Nov-86 12:37:27 EST
Article-I.D.: PSUVMA.8719DMB
Posted: Tue Nov 25 12:37:27 1986
Date-Received: Thu, 4-Dec-86 06:09:53 EST
References: <4501@reed.UUCP> <8419DMB@PSUVMA> 324@apple.UUCP
Lines: 8


   Is there a high penalty for using a mask region when performing copybits?
Are you better off always copybits-zing the entire bitmap, or is the masking
operation fairly fast? Where's the tradeoff point?



                                             dave