Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!mcvax!kth!draken!d88-jwa
From: d88-jwa@nada.kth.se (Jon W{tte)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Alternate screen buffer ... How?
Message-ID: <1192@draken.nada.kth.se>
Date: 15 Jun 89 17:43:43 GMT
References: <8042@cc.nu.oz>
Reply-To: d88-jwa@nada.kth.se (Jon W{tte)
Organization: Royal Institute of Technology, Stockholm, Sweden
Lines: 17

In article <8042@cc.nu.oz> c8637197@cc.nu.oz (Phil the Grk) writes:
>different size screen, but I'm working on it.)  In any case I would like to
>use the alternate screen buffer and install a little doodad as a Vertical
>Blanking Task so that the alternate screen buffer will be the "canvas" until
>I've finished drawing there, then the main screen buffer will be the canvas.
>It would be a lot quicker doing a simple bitset or whatever than it is copying
>22K, I think.

Not all screens are 22K, and the _Launch and _Chain are not the newest
routines in the world... Also, you ARE aware of the fact that a VBL has
no global variables, may not move or purge memory, and can't depend on
the A5 frame being valid ? I really should suggest another approach...

-- 
 __       Jon W{tte (The dread Smiley Shark) email:h+@nada.kth.se
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