-----BEGIN PGP SIGNED MESSAGE-----
But that is a difficult task considering how many things are possible
with the GIF standard. This picture uses offsets and slow frame rates,
others use transparency etc. A simple way to block these images would
be to scan the GIF for offset frames. I don't think there is any valid
GIF which makes use of these techniques...
Sure there is:
http://phil.ipal.org/tc.html
Check out the GIF at the top left of the page. And there is
a library to generate them in that format.
Granted, probably nobody uses it, but it does exist. :-)
- Logan
