Path: utzoo!mnetor!uunet!husc6!bloom-beacon!mit-eddie!uw-beaver!cornell!rochester!pt.cs.cmu.edu!andrew.cmu.edu!cc4b+
From: cc4b+@andrew.cmu.edu (Christopher Brian Cox)
Newsgroups: comp.sys.mac.programmer
Subject: PICT2 - bitmap compression
Message-ID: <cWP1Nby00V4J83VEtR@andrew.cmu.edu>
Date: 20 Apr 88 03:09:27 GMT
Organization: Carnegie Mellon University
Lines: 20

I need some help:

        I would like to find out exactly what compression scheme Apple is using
in the PICT2 bitmap format.  I assumed that it would be the same PackBits as
the older monochrome PICT.  When I tried using PackBits to compress the bitmap
the machine crashed while reading the bitmap.  Inside Mac V is definately wrong
in it's description of the compression, in addition to other facts about the
PICT2 format.
        Does anyone know what compression scheme they are using?  Could you
please send me some information about it?

        The reason I'm asking is:  I am trying to convert images off of a
larger computer system to PICT2 format.  I want to (almost have to) do all of
the conversion work on the larger system, so I can't use QuickDraw.


Thank you very much,

Chris Cox
cc4b@andrew.cmu.edu