[cups] Printing a PWG Raster file

Jacob Marble jacobmarble at google.com
Fri Jul 3 14:07:30 PDT 2015


Thanks, Michael, I understand.

If I wrote my own conversion code to adapt PWG Raster jobs to something
printable by CUPS, which raster format would be most faithful to the
original?

Jacob

On Tue, Jun 30, 2015 at 8:14 PM, Michael Sweet <msweet at apple.com> wrote:

> Jacob,
>
> Printing of PWG Raster files (i.e. with CUPS/drivers as consumers) is not
> supported.  cgimagetopdf does not understand PWG Raster files, and it is
> only because of the wildcard rule in apple.convs that it is reported as
> such.
>
>
> > On Jun 30, 2015, at 7:37 PM, Jacob Marble <jacobmarble at google.com>
> wrote:
> >
> > I would like to print PWG Raster files.
> >
> > Using OSX 10.10, queues have the following attribute:
> > document-format-supported = ..., image/pwg-raster,...
> >
> > I'm using the example .pwg files found at ftp.pwg.org.
> > $ lp filename.pwg
> >
> > Some (seemingly) relevant log lines follow, with my comments.
> >
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] 4 filters for job:
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] cgimagetopdf (image/pwg-raster to
> > application/pdf, cost 25)
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] cgpdftops (application/pdf to
> > application/postscript, cost 25)
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] pstops (application/postscript to
> > application/vnd.cups-postscript, cost 66)
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] -
> (application/vnd.cups-postscript
> > to printer/generic_ps, cost 0)
> > d [12/Jun/2015:00:59:27 -0700] generic_ps: File
> > "/usr/libexec/cups/filter/cgimagetopdf" permissions OK
> (040555/uid=0/gid=0).
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: Preparing to start
> > "/usr/libexec/cups/filter/cgimagetopdf", arguments:
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[0] =
> > "/usr/libexec/cups/daemon/cups-exec"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[1] = "-g"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[2] = "26"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[3] = "-n"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[4] = "0"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[5] = "-u"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[6] = "26"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[7] =
> > "/private/var/spool/cups/tmp/10efd55805db3"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[8] =
> > "/usr/libexec/cups/filter/cgimagetopdf"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[9] = "generic_ps"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[10] = "35"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[11] =
> "jacobmarble"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[12] = "olb1.pwg"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[13] = "1"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[14] =
> "finishings=3
> > number-up=1 job-uuid=urn:uuid:295cad9b-5ad1-32c5-7ae5-1db126827a44
> > job-originating-host-name=localhost time-at-creation=1434095967
> > time-at-processing=1434095967"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: argv[15] =
> > "/private/var/spool/cups/d00035-001"
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: Setting spawn
> attributes.
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: Setting file actions.
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: Calling posix_spawn.
> > d [12/Jun/2015:00:59:27 -0700] cupsdStartProcess: pid=78065
> > d [12/Jun/2015:00:59:27 -0700]
> > cupsdStartProcess(command="/usr/libexec/cups/filter/cgimagetopdf",
> > argv=0x7fff5bd8d010, envp=0x7fff5bd8f390, infd=-1, outfd=27, errfd=21,
> > backfd=22, sidefd=24, root=0, profile=0x7fafe140eee0,
> > job=0x7fafe1528c80(35), pid=0x7fafe1528d8c) = 78065
> > I [12/Jun/2015:00:59:27 -0700] [Job 35] Started filter
> > /usr/libexec/cups/filter/cgimagetopdf (PID 78065)
> >
> > So gcimagetopdf should convert the PWG Raster to PDF format. After that,
> > it's standard stuff.
> >
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] There was a problem reading the
> > image file /private/var/spool/cups/d00034-001.
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] PID 77541
> > (/usr/libexec/cups/filter/cgimagetopdf) stopped with status 1.
> > E [12/Jun/2015:00:45:46 -0700] [Job 34] The file
> > ‘/private/var/spool/cups/tmp/12ee65581b66f’ could not be opened.
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] PID 77542
> > (/usr/libexec/cups/filter/cgpdftops) stopped with status 1.
> > D [12/Jun/2015:00:45:46 -0700] [Job 34] The print file is empty.
> >
> > gcimagetopdf fails because the file either couldn't be opened or was
> empty.
> > Let's try the filter from the command line:
> >
> > $ /usr/libexec/cups/filter/cgimagetopdf 0 me "job title" 1 "" olb1.pwg
> > DEBUG: cgimagetopdf - document title: "job title"
> > DEBUG: cgimagetopdf - filename: "olb1.pwg"...
> > DEBUG: No size in ppd, assuming letter
> > There was a problem reading the image file olb1.pwg.
> >
> > Am I making a bad assumption that document-format-supported always speaks
> > 100% truth?
> >
> > *Should* this work?
> >
> > I understand that PWG Raster support is mainly intended for IPP
> Everywhere,
> > so the use case is a filter output, not a filter input. I need it for
> > filter input.
> >
> > Jacob
> > _______________________________________________
> > cups mailing list
> > cups at cups.org
> > https://www.cups.org/mailman/listinfo/cups
>
> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
> _______________________________________________
> cups mailing list
> cups at cups.org
> https://www.cups.org/mailman/listinfo/cups
>



More information about the cups mailing list