Re: [Gimp-print-devel] HP replies!

[Chema C. <ch...@ce...>]

1.  REGARDING HP REPLY

I am intrested in ReverseEngineer this stuff,
so if anyone is too we can work together. I don't
have the time right now but I will. 

About the atitude towards UNIX, I would not
worry a lot. Things will change, in the near future
by it's own weigth and companies will start sending
us patches.

I don't like Epsons attitude either, with their 
"secrets" commands and with releasing specs to 
some Free Software developers and asking them not
to share it. HP documentation is far supperior
than Epson.

2. PCL COMPRESSION

I implemented HP's supported compression methods
( except #9, and there isn't a big gain doing so) and I
spent the weekend optimizing the driver to get the best
compression. The compression ratios achieved where
amazing. (98% Color 96% B&W ). It is important since
the speed improvement in printing this stuff in lasers
is noticeable.

If you guys want to use the code its in :
gnome-print/libgnomeprint/gnome-print-compress.[ch]

and if you want to check the optimization I did :
gnome-print/libgnomeprint/gnome-print-pclr.[ch]

I would love if we start sharing code either by
the use of libraries or by sharing ".c" files.
For example, migrating the compression code from
your PCL driver to use "gnome-print-compress.c"
and you can distribute this file with your code.
I will start working on integrating EPSON's compression
to that file this week. (  It might not need changes)


Chema Celorio
ch...@ce...


sh...@al... wrote:
> 
> > I aksed HP the big question about releasing specs for their
> > printers and this was the answer:-
> >
> >      Thank you for your inquiry.  Regarding the PhotoRet technology it
> > is
> >      only currently accessible from the Windows Driver.  If you are
> >      operating outside the Windows environment and can't take advantage
> > of
> >      the driver, the only commands available are in the PCl Developer
> >      Guide.
> >
> > This, of course is exactly the answer I expected.
> >
> > Anyone got any suitable ammunition to fire back at them?
> >
> > I notice they use the words "only currently accessible".
> 
> I'm sure it's unlikely to produce anything beneficial, but you could always
> ask for the the source to the Windows driver and offer to port it.
> 
> Eric
> 
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