[Foo2zjs-maintainer] Bug#580690: Bug#580690: foo2zjs: Moire on Samsung CLX-3175 with foo2qpdl

[Luca Capello]

Hi Alexey!

On Fri, 07 May 2010 21:35:42 +0200, Alexey Feldgendler wrote:
> Version: 20090908dfsg-3
[...]
> Samsung CLX-3175 produces low quality printouts when using foo2qpdl
> from this package. Full-color images have heavy moire, and the colors
> are somewhat off (ICM problem?).

Have you tried with the ICM files upstream provides?  You should
download them with the 'getweb' script:

  # getweb 3175

Then, if nothing changes, please also try moving the ICM files from the
foo2zjs folder to the foo2qpdl one:

  # mv /usr/share/foo2zjs/icm/samclp3* /usr/share/foo2qpdl/icm/

In the current Debian package (version 20090908dfsg-4), the 'getweb'
script puts all ICM files into /usr/share/foo2zjs/icm/.  The same script
From the Ubuntu package, however, splits them in the correct folder,
something I am integrating in Debian as well.

> I've compared these printouts to what Samsung's proprietary Linux
> driver produces. Those printouts don't have the described problems.

That is good to know.  Do you have any Samsung's ICM that you can try
with foo2zjs?  However, I am not sure Samsung's ICM will work...

> Ghostscript version 8.71.

This should be OK, according to upstream INSTALL file:

--8<---------------cut here---------------start------------->8---
GHOSTSCRIPT BUGS
----------------
    * ghostscript 8.64 is broken w.r.t. color.  Don't use!

    * Well Tempered Screening (WTS) works with ghostscript 8.54 thru 8.70+.
      So if you want BEST COLORS, you'll have to install gs 8.54 or better
      if you don't have it.
      [...]

    * Ghostscript before 8.55 has a problem with ICM files and 64-bit gcc.
      It causes a segfault with km2430_2.icm. So don't select that one.
--8<---------------cut here---------------end--------------->8---

> I know this bug report probably doesn't help much. I can help you
> debug this by producing e.g. test QPDL files, if you tell me how.

I have never used such files (I own only an HP Color LaserJet 1500L, now
broken), but you should simply copy the upstream QPDL files from
foo2zjs/crd/qpdl/* into /usr/share/foo2qpdl/crd/.

NB, these files were removed from the Debian package because their
    license is unclear, thus we can not distribute them.

Obviously, you can also try to use the QPDL files from Samsung's
proprietary Linux driver.

Finally, there is a new updated package, with a lot of improvements and
more synchronized with the Ubuntu package (but it still misses the split
for files downloaded via the 'getweb' script):

  http://bugs.debian.org/594322
  http://people.debian.org/~gismo/tmp/

If you can try this new package, please let me know first if it works
and then if anything changes.

Thx, bye,
Gismo / Luca
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