From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <48E50424.1080802@gmail.com> Date: Thu, 02 Oct 2008 19:25:56 +0200 From: Till Kamppeter MIME-Version: 1.0 References: <48E22E48.5050400@gmail.com> <20081002.190418.28794737.sho@bbr.jp> In-Reply-To: <20081002.190418.28794737.sho@bbr.jp> Content-Type: text/plain; charset="utf-8"; format="flowed" Content-Transfer-Encoding: 8bit Subject: Re: [Printing-architecture] Bug in pdftoraster filter List-Id: Printing architecture under linux List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Koji Otani Cc: printing-architecture@lists.linux-foundation.org, printing-japan@lists.linux-foundation.org Thank you very much for the fixes. I will apply them to Intrepid in the next days and forward the SpliX fix upstream. Till Koji Otani wrote: > Hi > I'm Koji Otani. > > I've investigated this problem. > > There are 2 problems in fact. > > 1. splix crashes > https://bugs.launchpad.net/ubuntu/+source/splix/+bug/261363 > https://bugs.launchpad.net/ubuntu/+source/splix/+bug/268510 > This happenes when page size is Letter. > > 2. yield completely black pages > https://bugs.launchpad.net/ubuntu/+source/splix/+bug/269691 > > *** CAUSE *** > > 1. splix crashes > This is cauesed by several filters' behaviors. > (1) pstopdf > pstopdf produces Only A4 size PDF even when Letter is specified. > This behavior seems a bug, I think. > This is because no page size option is specified for ps2pdf. > (2) pdftopdf > pdftopdf doesn't change PDF page size in this case. > So, the produced PDF is A4 size. > (3) pdftoraster > pdftoraster produces image which size is same as PDF page size. > So, the produced image size is A4 size. > (4) splix > splix crashes when height of image size is larger than expected. > In this case, input image size is A4 and expected image size is > Letter. So, splix crashes. > This is a bug of splix. > On 64bits AMD, splix doesn't crash luckily although accessing > wrong area. > > 2. yield completely black pages > When color space is K, pdftoraster uses wrong paper color (Black). > Images in PDF are reversed video. > And splix requires color space K. > This is a bug of psdtoraster. > > ******** Solution ********* > 1. splix crashes > (1) Fix pstopdf to produce PDF has specified Page size. > Using pstops as cpdftocps, setpagedevice operators are passed to ps2pdf. > Attached the patch. > (2) Fix splix not to crash. > Attached the patch. > This fix is optional in this case. > (3) Change pdftoraster to produce cups specified size image. > Attached the patch. > In this case, this fix is not needed. But in other case this is > needed. please apply this patch. > > (4) Change pdftopdf to produce cups specified size PDF. > Attached the patch. > In this case, this fix is not needed. But in other case this is > needed. please apply this patch. > > 2. yield completely black pages > > ・Fix pdftoraster > Attached the patch. this is merged in solution 1-(3) patch. > > > --------------- > I have applied patches for pdftopdf, pdftoraster to the > sourceforge jp repository. > > ------------------------- > Koji Otani > > From: Till Kamppeter > Subject: Bug in pdftoraster filter > Date: Tue, 30 Sep 2008 15:48:56 +0200 > Message-ID: <48E22E48.5050400@gmail.com> > > till.kamppeter> Hi, > till.kamppeter> > till.kamppeter> I have integrated your filters in the CUPS package on Ubuntu and now we > till.kamppeter> have a complete PDF printing workflow there: > till.kamppeter> > till.kamppeter> https://www.linuxfoundation.org/en/OpenPrinting/PDF_as_Standard_Print_Job_Format > till.kamppeter> https://blueprints.launchpad.net/ubuntu/+spec/pdf-as-standard-print-job-format > till.kamppeter> > till.kamppeter> Thank you again for your great work. > till.kamppeter> > till.kamppeter> Unfortunately, your pdftoraster filter has a bug. It seems to output a > till.kamppeter> broken CUPS Raster stream. The "SpliX" driver (a CUPS Raster driver for > till.kamppeter> Samsung laser printers, http://splix.ap2c.org/, > till.kamppeter> http://openprinting.org/show_driver.cgi?driver=splix2) produces black > till.kamppeter> printouts or even crashes when your pdftoraster is used: > till.kamppeter> > till.kamppeter> https://bugs.launchpad.net/ubuntu/+source/splix/+bug/261363 > till.kamppeter> https://bugs.launchpad.net/ubuntu/+source/splix/+bug/268510 > till.kamppeter> https://bugs.launchpad.net/ubuntu/+source/splix/+bug/269691 > till.kamppeter> > till.kamppeter> To check whether pdftoraster is really the culprit, I have written an > till.kamppeter> alternative pdftoraster, a very simple shell script: > till.kamppeter> > till.kamppeter> #!/bin/sh > till.kamppeter> set -e > till.kamppeter> /usr/lib/cups/filter/cpdftocps "$@" | \ > till.kamppeter> /usr/lib/cups/filter/pstoraster "$@" > till.kamppeter> > till.kamppeter> cpdftocps is a filter which converts PDF to PostScript and injects > till.kamppeter> PostScript commands from the PPD into the resulting PostScript according > till.kamppeter> to the option settings. It is originally intended to support PostScript > till.kamppeter> printers in the PDF workflow. You can download it here: > till.kamppeter> > till.kamppeter> http://www.openprinting.org/download/printing/pdf-printing/cpdftocps > till.kamppeter> > till.kamppeter> I have asked the reporters of the above-mentioned bugs to use this > till.kamppeter> alternative filter and they told that when they use it the problems with > till.kamppeter> "SpliX" disappear. > till.kamppeter> > till.kamppeter> So I assume that something is broken with your pdftoraster driver. Can > till.kamppeter> you check and fix this as soon as possible, as we are shortly before > till.kamppeter> release of Ubuntu Intrepid and it would be great to not have to use a > till.kamppeter> script which converts the PDF to PostScript to be able to get CUPS > till.kamppeter> Raster data. > till.kamppeter> > till.kamppeter> For investigating the problem, feel free to get in contact with the > till.kamppeter> reporters of the three above-mentioned bug reports, by adding comments > till.kamppeter> to the reports. > till.kamppeter> > till.kamppeter> I have also tried the alternative of a Ghostscript-based pdftoraster > till.kamppeter> driver where PDF is directly fed into Ghostscript, but it seems that > till.kamppeter> there is a bug in the "cups" output device of Ghostscript. See > till.kamppeter> > till.kamppeter> http://bugs.ghostscript.com/show_bug.cgi?id=690101 > till.kamppeter> > till.kamppeter> This problem does not occur when feeding PostScript into Ghostscript. > till.kamppeter> Anyone who could help here is welcome, too. > till.kamppeter> > till.kamppeter> Thank you in advance for your quick help. > till.kamppeter> > till.kamppeter> Till >