Article View: comp.sys.mac
Article #24713Re: QuickerDraw
From: Mike Blackwell
Date: Thu, 04 Feb 1988 14:14
Date: Thu, 04 Feb 1988 14:14
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The way I understand it, Hertzfeld made the remarkable discovery that when you're in 8-bit mode, you never have to check if you need to do bit shifts, since you're always byte aligned. Saves a couple of instructions per pixel, which could be substantial. Why the color QuickDraw implementers didn't figure this out, though, is beyond me - operating in 8-bit mode is common, and should have been special cased in the first place. Mike Blackwell ... mkb@rover.ri.cmu.edu
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arc1-ca.pugleaf.net!utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!ll-xn!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!ROVER.RI.CMU.EDU!mkbShow Full Headers
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Path: arc1-ca.pugleaf.net!utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!ll-xn!mit-eddie!uw-beaver!cornell!rochester!PT.CS.CMU.EDU!ROVER.RI.CMU.EDU!mkb From: mkb@ROVER.RI.CMU.EDU (Mike Blackwell) Newsgroups: comp.sys.mac Subject: Re: QuickerDraw Message-ID: <801@PT.CS.CMU.EDU> Date: 4 Feb 88 14:14:15 GMT Sender: netnews@PT.CS.CMU.EDU Reply-To: mkb@rover.ri.cmu.edu (Mike Blackwell) Organization: Carnegie-Mellon University, CS/RI Lines: 7