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- Path: sparky!uunet!gatech!concert!borg!bach!lari
- From: lari@bach.cs.unc.edu (Humayun Lari)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: LockPixels() before every CopyBits()?
- Message-ID: <15368@borg.cs.unc.edu>
- Date: 16 Sep 92 00:07:10 GMT
- References: <1992Sep11.213220.23039@alias.com> <1992Sep12.232233.4076@desire.wright.edu>
- Sender: news@cs.unc.edu
- Organization: The University of North Carolina at Chapel Hill
- Lines: 12
-
- In article <1992Sep12.232233.4076@desire.wright.edu> jmatthews@desire.wright.edu writes:
- >IM VI just says use GetGWorldPixMap without much explanation. I've
- >imagined this makes a difference with GWorlds on graphic accelerators
- >or temporary memory, but I don't really know.
-
- I seem to remember reading somewhere that GetGWorldPixMap is recommended
- so that your code works on machines that do not have Color Quickdraw
- (e.g. Classics under 7.x), since a GWorldPtr on such machines points to an
- extended GrafPort rather than a CGrafPort.
-
- Humayun Lari
- (lari@cs.unc.edu)
-