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From: dlawson@grebyn.com (Drew Lawson)
Newsgroups: comp.graphics
Subject: Re: Viewer for GIF89a
Message-ID: <22187@grebyn.com>
Date: 24 Sep 90 11:44:13 GMT
References: <1990Sep17.200013.10204@cbnewsh.att.com>
Reply-To: dlawson@grebyn.UUCP (Drew Lawson)
Distribution: usa
Organization: Grebyn Timesharing, Vienna, VA, USA
Lines: 22

In article <1990Sep17.200013.10204@cbnewsh.att.com> twb@cbnewsh.att.com (thomas.w.beattie) writes:
>
>Is there a newer version of Cshow that supports 89a?

Yes, Cshow 8.21a is out.  I got it off CompuServe.  Sorry, I don't have
FTP access.

>Anyone care to explain what is new and improved about GIF89a? and why it
>isn't backward compatible?

One factor I know is that 89a allows for 'extension records' which allow
a system to store additional information in the GIF file.  I got this
from the FractInt documentation.  They store the fractal computation
information in the GIF file so that you can store partially computed
fractal images.  I assume that the format has other changes, but older 
viewers wuold not know to ignore these records.

-- 
+--------------------------------------------------------------------+
| Is life an illusion?                          | Drew Lawson        |
| Or does it just seem that way?                | dlawson@grebyn.com |
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