zork zero - blorb files

[Alexandre Detiste]

Le vendredi 5 février 2016 13:00:09, vous avez écrit :
> Hi Alexandre,
> 
> Le 05/02/2016 10:53, Alexandre Detiste a écrit :
> > I'm working on adding support for Zork Zero.
> > 
> > I sumble on the graphic ressources:
> >       - zork0.cg1
> >       - zork0.eg1
> >       - zork0.mg1
> > 
> [...]
> > 
> > Wouldn't it be better to handle this resource decoding ourselves
> > instead of relying on some third-party undocumented external download
> > ?
> > 
> > http://ifarchive.jmac.org/if-archive/infocom/interpreters/specification/blorb-infocom-extension.txt
> 
> Yes, that's why I added the hashes of the original files for Arthur. I 
> don't know how to re-create the blorb currently, but if we do figure out 
> how to do it then we'll already have the appropriate information... So 
> for now we can only use the downloaded file, but that seems reasonably 
> safe to me since we check the download against the known hashes. (I 
> checked the contents of the blorbs and as far as I can determine there's 
> nothing dodgy.)

A current libpng exploit in a file from 2001 is rather unlikely;
it's just a bit sad that this piece of converter code is lost.

Maybe some square pictures that could be used as icons could be extracted from these Blorb files.

(#803930 please add support to create icons from the game data)