Date   : Mon, 01 Oct 2012 04:38:00 +0100
From   : jgh@... (J.G.Harston)
Subject: Manual GIF creation

Anybody know anything about low-level GIF format?

BBCtoBMP at mdfs.net/Apps/Graphics/Conversion successfully converts BBC
screen dumps to BitMap files. A couple of years ago I started trying to
do the same to create GIF files. I gave up. I've started again.

mdfs.net/temp/China.gif is supposed to be an uncompressed GIF. It's
supposed to be the GIF version of mdfs.net/temp/China.bmp. As far as I
can tell, I'm outputting what all the documentation and code samples
tell me is what an uncompressed GIF should be. But everything I try to
view it with says it isn't. A simple GIF extractor that I wrote manages
to successfully extract the image data, but then I'm extracting what I
expect I've put in there.

Can anybody help. What is wrong with China.gif that makes it not a GIF?

Thanks.

-- 
J.G.Harston - Whitby Wiki - http://whitby.wikia.com