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Bug#504415: marked as done (foo2zjs: Ghostscript processing produces blurry printouts)

Your message dated Thu, 30 Jan 2020 21:34:47 +0100
with message-id <1828131.m2b379iRa1@odyx.org>
and subject line Re: Bug#504415: foo2zjs: Ghostscript processing produces blurry printouts
has caused the Debian Bug report #504415,
regarding foo2zjs: Ghostscript processing produces blurry printouts
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
504415: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=504415
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: foo2zjs
Version: 20081007dfsg-1~gismo
Severity: normal
Tags: upstream patch
User: irlab@unige.ch
Usertags: print

Hi there!

NB, the version I use is a not-yet-uploaded one as explained at [1].

Since the first time I installed the HP Color LaserJet 1500L the
laboratory where I work has, I was disappointed by the overall bad
quality for printouts when you use the "color" mode.  Since the upstream
page mark it as "alpha quality" I thought it was normal.  However, while
performing some more tests to resolve bug #449497 [3], I found some
interesting stuff.

The bad quality is characterised by two factors: first, color pages are
"darker" than the same ones but printed from Windows XP or Mac OS X 10.4
(thus with the upstream HP driver); second, every shape (being it a text
or a square) has a very dark blue shadow, clearly visible.  While the
former is less important and I guess it could be easily adjusted with an
ICM profile [4], the latter is not acceptable, since it degrades any
printout.

I am now quite sure the blurry problem is caused by Ghostscript during
the image processing, for two reasons:

1) Evince_2.22.2-4 can print without any problem, while lpr produces a
   blurry output when printing the same PDF

2) if the PDF is converted to PS with pdf2ps, even lpr can produces
   correct printouts

Since I am not a Ghostscript expert and I have already spent too much
time with this printer, a quick solution is to generate from the input
data a PS output before converting it to the format the printer expects:

--8<---------------cut here---------------start------------->8---
--- foo2oak-wrapper.in.ORG	2008-11-03 18:35:51.000000000 +0100
+++ foo2oak-wrapper.in	2008-11-03 18:37:18.000000000 +0100
@@ -656,6 +656,7 @@
 
 foo2zjs-pstops $PSTOPS_OPTS | \
 $PREFILTER \
+| ($GS -q -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pswrite -sOutputFile=- -) \
 | ($GS $PAPERSIZE -g$DIM -r$RES $GSDEV $GSOPTS \
     -sOutputFile="|cat 1>&3" $GAMMAFILE -_ >/dev/null 2>/dev/null) 3>&1 \
 | foo2oak -r$RES -g$DIM -p$PAPER -m$MEDIA -n$COPIES -d$DUPLEX -s$SOURCE \
--8<---------------cut here---------------end--------------->8---

IMHO while this works, it is a ugly hack, since the input data is double
processed.

Thx, bye,
Gismo / Luca

Footnotes: 
[1] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=466758#15
[2] http://foo2oak.rkkda.com/
[3] http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=449497
[4] AFAIK there are no official ICM profiles for this printer

-- System Information:
Debian Release: lenny/sid
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: i386 (i686)

Kernel: Linux 2.6.26-1-686 (SMP w/1 CPU core)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages foo2zjs depends on:
ii  libc6                         2.7-13     GNU C Library: Shared libraries

Versions of packages foo2zjs recommends:
ii  foomatic-db-engine      3.0.2-20080211-1 OpenPrinting printer support - pro
ii  wget                    1.11.4-2         retrieves files from the web

Versions of packages foo2zjs suggests:
pn  hannah-foo2zjs                <none>     (no description available)
pn  psutils                       <none>     (no description available)

-- no debconf information

Attachment: pgpiTFXftyhZo.pgp
Description: PGP signature


--- End Message ---
--- Begin Message --- 
Control: tags -1 +wontfix

Le lundi, 3 novembre 2008, 18.42:14 h CET Luca Capello a écrit :
> The bad quality is characterised by two factors: first, color pages are
> "darker" than the same ones but printed from Windows XP or Mac OS X 10.4
> (thus with the upstream HP driver); second, every shape (being it a text
> or a square) has a very dark blue shadow, clearly visible.  While the
> former is less important and I guess it could be easily adjusted with an
> ICM profile [4], the latter is not acceptable, since it degrades any
> printout.
> 
> I am now quite sure the blurry problem is caused by Ghostscript during
> the image processing, for two reasons:

Ghostscript has changed so much in 11 years; and I don't own that specific 
printer; closing as wontfix, sorry.

Feel free to reopen if that bug is still present.

Friendly,
    OdyX

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