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- Path: sparky!uunet!paladin.american.edu!gatech!enterpoop.mit.edu!eru.mt.luth.se!kth.se!dront.nada.kth.se!d88-jwa
- From: d88-jwa@dront.nada.kth.se (Jon Wtte)
- Newsgroups: comp.sys.mac.programmer
- Subject: Re: visRgn and New IM
- Message-ID: <1992Dec23.225633.17132@kth.se>
- Date: 23 Dec 92 22:56:33 GMT
- References: <hMX=7K_@engin.umich.edu>
- Sender: usenet@kth.se (Usenet)
- Organization: Royal Institute of Technology, Stockholm, Sweden
- Lines: 34
- Nntp-Posting-Host: dront.nada.kth.se
-
- In <hMX=7K_@engin.umich.edu> positron@engin.umich.edu (Jonathan Scott Haas) writes:
-
- >Firstly, suppose I have a window onto a very large picture, that the user
- >can scroll around in the usual way. Is it OK to redraw that very large
- >picture at every updateEvt, trusting the visRgn to do the clipping... or
- >will drawing (and discarding most of) such a large picture slow down
- >my application intolerably?
-
- Well, if the picture is in the form of a bit map, it would be OK.
- What I would do is to draw the picture into an offscreen GWorld
- matching the screens color setup, and CopyBits from there.
- Remember to render the picture anew each time the color setup
- changes.
-
-
- >Secondly, is every volume of the New Inside Macintosh available yet? I
-
- New Inside Mac WILL be a replacement for Old IM, but not until
- late next year when the last of the volumes is to be released.
- (Actually they'll add several volumes more on OCE, QDGX etc :-)
-
- If you want to do development now, buy IM I, II, IV and VI.
- Or buy a CD ROM reader and subscribe to _develop_ and get a CD
- with all of them (and the new ones that are released!) online.
-
- Cheers,
-
- / h+
-
- --
- -- Jon W{tte, h+@nada.kth.se, Mac Hacker Deluxe --
- "It was, in fact, cool as all get-out. Fortunately it was a little
- too late (historically speaking) to be groovy."
- -- Dennis Pelton
-