Digital BW, The Print

----- Original Message -----
From: <roy@...>
To: <DigitalBlackandWhiteThePrint@yahoogroups.com>
Sent: 07 February, 2003 06:11
Subject: [Digital BW] Re: Gimp-Print + Linux

> The idea is to get "quadraster" into the middle of the filter
> pipeline.  The pstoraster being a shell script on my system
> made that very easy.  I think there's two possibilities to make
> this work.  First, it may be possible to configure the PPD
> so that CUPS inserts quadraster into the pipefile, but that
> may involve a new file type name.  Second would be to make
> a new program (c code or shell script) that calls the two
> programs with a pipe in between.
>

Roy

I re-installed CUPS 1.1.18 and found that   "pstoraster"  is then also a
shell script. Comparing your script with the installed one, I made some
small changes to your script :  changed  "/usr/local"  to  "/usr"  and
changed   "gs"  to  "gs-esp"  at the end.  The filter library in my case is
at  "/usr/lib/cups/filter"  instead of  " /libexe/  ".
The print dialogue in The Gimp does not show the option "Quad Tone Inks and
Curves" but  "xpp" does.
So I submitted a small stepwedge and everything went through, except nothing
came from the printer - a 1160 like yours. Cups localhost showed that the
print is waiting to be printed, but nothing for more than 15 minutes. I then
started to shutdown Linux and then the printer printed about 5mm of the
stepwedge.
I also tried to re-compile "quadraster" but the compiler complains about not
finding
"cups.h", "ppd.h" and "raster.h". I am not a programmer so that was that.
So in conclusion it looks like it is mostly working except for some small
problem.

> I think I see the confusion.  You don't save the curves in
> the Curves command.  The idea is to save the main file
> with the curve adjustment in effect.  So you change the
> curve layer and finish, then you do a Save As for the whole file.
> This is where you find the Raw format.  The raw format  of
> the file shows what happens to all possible 256 gray values
> during the printing process.
>
I have not actively used Photoshop for a numder of years so I lost track. (I
am using Picture Window Pro under Wine in Linux). I did some RTM and figured
it out. Just one question - can the actual curves for each of the
"CurveName.quad" files be extracted - i.e. the "xxx.acv" files? It would
give me a starting point to tweak the curves. Else, would you be so kind as
to post them somewhere?

Reinier van der Ryst
Secunda, South Africa