[prev in list] [next in list] [prev in thread] [next in thread] 

List:       koffice-devel
Subject:    Re: LZW compression?
From:       David Faure <david () mandrakesoft ! com>
Date:       2002-01-15 19:08:42
[Download RAW message or body]

On Tuesday 15 January 2002 18:01, Michael Marcucio wrote:
> From: David Faure <david@mandrakesoft.com>
> 
> >Anyway, the powerpoint->kpresenter filter is at a very rudimentary stage, 
> >and
> >I doubt the problem you're seeing is related to any kind of compression,
> >rather to the fact that this filter needs much work AFAIK.
> 
> you are absolutly right about the filter being in a pre-alpha stage of 
> development (hopefully thats where i come in;). as i was happily parsing 
> each of the containers that were coming back from the file, i get this 
> container that (well in the ms documention) says it contains a lzw 
> compressed docfile which contains the ole object data.  this is where the 
> the filter chokes most of the time. anyway, i figured since i was already 
> here i would try to decompress the docfile. if it turns out i don't need the 
> info i will be more than happy to skip it!

Ah, I didn't understand that you were actually working on the filter, sorry ;)
Very good ;)
[I have added you to the posters list, no more moderation queue ;)]

About LZW:
* with GIFs, it's writing GIF that's forbidden, not reading GIFs, so 
decompressing LZW data shouldn't be a problem
* AFAIK, LZW is a variation of LZ77 - it would be interesting to know if an 
LZ77-decompressor (like zlib, though zlib is LZ77+Haufmann) can open LZW 
data.... hmm, probably not.

-- 
David FAURE, david@mandrakesoft.com, faure@kde.org
http://people.mandrakesoft.com/~david, http://www.konqueror.org
KDE 3.0: Konquering the Desktops

_______________________________________________
koffice-devel mailing list
koffice-devel@mail.kde.org
http://mail.kde.org/mailman/listinfo/koffice-devel
[prev in list] [next in list] [prev in thread] [next in thread]