Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!mcsun!ukc!cf-cm!ralph
From: ralph@computing-maths.cardiff.ac.uk (Ralph Martin)
Newsgroups: comp.sys.mac.programmer
Subject: Compressed resources
Keywords: Resource ResEdit
Message-ID: <1991Jan22.110540.3139@computing-maths.cardiff.ac.uk>
Date: 22 Jan 91 11:05:40 GMT
Sender: ralph@cm.cf.ac.uk
Organization: University of Wales College of Cardiff
Lines: 17

The new ResEdit has a checkbox to show some whether a resource is
compressed or not. Some of the resources in System 7.0b1 are indeed
compressed.  However, I can find NO documentation on compressed
resources. There seems to be no mention of them in the Inside Mac
Volume 6 resource manager or other chapters. Can anyone either point
me to the documentation, or explain how they work?  

I've found a reference in Types.r to compressed resource guard
mechanisms, and ResEdit itself seems to contain some code for
decompressing resources, but thats about all I can find. I have some
resources of my own it would be very handy to compress, and want to
know if resource compression is (or will be) available for general
use, or just for the System etc. The obvious trick of clicking on the
compressed checkbox in ResEdit does NOT compress a resource. It seems
to be read-only.

Ralph