Re: XEmacs and 1x1 gif images

On Tue, 03 Jan 2012 00:54:09 +0900 "Stephen J. Turnbull" <stephen(a)xemacs.org&gt; wrote: Correct. Because of the design of image gifs (I don't want to get into text gifs and other weird types) the terminator char is really just a warm fuzzy. It is required by the spec, but not required to properly display the gif. At a very high level, the format on an image gif is: headers image block(s) 0x00 terminator 0x3b terminator Basically, you loop through the image blocks until you get a size of 0. If you see the 0, the image is done. The 0x3b just confirms that. No. The UserData is not used in giflib. That struct is for gif_read_from_memory only. I set the len to 0 so that we don't provide 0x3b more than once. I don't think it would happen, but I am paranoid that way ;) I believe it could be safely left out. I was actually quite surprised that the image viewers and browsers I tried handled the broken gif. But I guess that is why they get away with it. And I was wrong about emacs. It just handles the error differently, it will not display a gif without a terminator. It looks like it draws an empty square. Cheers, Sean _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta