[Printing-architecture] Number of copies in pure PDF workflow

[Alex Korobkin]

Thanks, I had no clue cupsFilter2 keyword would have such effect. But
weirdly, after changing cupsFilter to cupsFilter2 the job is now benig
converted to postscript.

I mean, i had this in the PPD:
*cupsFilter: "application/vnd.cups-pdf 0 -"

And these filters were run:

[Job 12] 2 filters for job:
[Job 12] pdftopdf (application/pdf to application/vnd.cups-pdf, cost 66)
[Job 12] - (application/vnd.cups-pdf to printer/tiefighter-color, cost 0)

I changed it to
*cupsFilter2: "application/vnd.cups-pdf 0 -"

And now pdftops is somehow invoked:

[Job 13] 3 filters for job:
[Job 13] pdftopdf (application/pdf to application/vnd.cups-pdf, cost 66)
[Job 13] pdftops (application/vnd.cups-pdf to
application/vnd.cups-postscript, cost 100)
[Job 13] - (application/vnd.cups-postscript to printer/tiefighter-color,
cost 0)

This is CUPS 1.7.5 with cups-filers 1.0.58. Why would that happen?

2014-10-06 10:12 GMT-04:00 Michael Sweet <msweet at apple.com>:

> Alex,
>
> The PPD needs to use the cupsFilter2 keyword that specifies and output
> format of application/pdf, application/vnd.cups-pdf, or and image/* format.
>
>
> > On Oct 5, 2014, at 1:03 AM, Alex Korobkin <korobkin+op at gmail.com> wrote:
> >
> > Michael,
> >
> > I had tested this workflow with ipp backend, and it didn't communicate
> the number of copies to the printer. What conditions must be met for ipp
> backend to be able to specify the number of copies?
> >
> > Should printer reply over IPP with "copies-supported"?
> >
> > 2014-10-04 15:48 GMT-04:00 Michael Sweet <msweet at apple.com>:
> > Alex,
> >
> > You'll have to confirm with Till, but AFAIK the pdftopdf filter doesn't
> support PJL options.
> >
> > Naturally the socket backend cannot provide out-of-band job ticket
> information, but the IPP backend *can*.  (that goes back to my comment
> about IPP Everywhere)
> >
> > > On Oct 4, 2014, at 1:36 PM, Alex Korobkin <korobkin+op at gmail.com>
> wrote:
> > >
> > > Hi Michael,
> > >
> > > Sorry, I should have been more clear with my question. I'm asking
> about OpenPrinting PDF workflow [1], where client sends a PDF, and CUPS
> uses just two filters for the job: pdftopdf and a socket/ipp to send the
> PDF directly to the printer. No conversion to raster is happening: client
> sends a PDF, printer receives a PDF.
> > >
> > > cups-filters package ships with a couple of sample PPDs [2], [3] that
> basically allow for inserting PJL commands into the job to change its most
> common options: tray, duplex, etc.
> > >
> > > I'm trying to find out whether making manual copies via
> cupsManualCopies is the only way to handle the number of copies. Can
> pdftopdf or CUPS insert PJL SET COPIES=X into the job? Can CUPS set the
> number of copies via IPP commands? There is also some code in
> pdftopdf_jcl.cc [4] that is dealing with a Copies directive in a PPD, but I
> don't quite understand what it does.
> > >
> > > [1]
> http://www.linuxfoundation.org/collaborate/workgroups/openprinting/pdf_as_standard_print_job_format
> > > [2]
> http://bzr.linuxfoundation.org/loggerhead/openprinting/cups-filters/annotate/head:/ppd/HP-Color_LaserJet_CM3530_MFP-PDF.ppd
> > > [3]
> http://bzr.linuxfoundation.org/loggerhead/openprinting/cups-filters/annotate/head:/ppd/Fuji_Xerox-DocuPrint_CM305_df-PDF.ppd
> > > [4]
> http://bzr.linuxfoundation.org/loggerhead/openprinting/cups-filters/annotate/head:/filter/pdftopdf/pdftopdf_jcl.cc#L35
> > >
> > > 2014-10-04 11:40 GMT-04:00 Michael Sweet <msweet at apple.com>:
> > > Alex,
> > >
> > > > On Oct 3, 2014, at 3:28 PM, Alex Korobkin <korobkin+op at gmail.com>
> wrote:
> > > >
> > > > Hi all,
> > > >
> > > > I'm looking at example PPDs for pure PDF workflow, and all of them
> have
> > > > cupsManualCopies: true
> > > >
> > > > Why is that? Is it impossible to tell printer to print a number of
> copies with pure PDF workflow?
> > > > Maybe pdftopdf can inject @PJL SET COPIES=X into the file?
> > >
> > > No, that wouldn't work since the PDF-to-raster filters don't support
> PJL and (for that matter) most PDF printers do not support PJL.
> > >
> > > cupsManualCopies is there because the destination doesn't support
> generating copies of its own.  If it does, then cupsManualCopies won't be
> in the PPD - in the case of IPP Everywhere printers the copy count is
> passed in the job ticket when we create the job from the IPP backend.
> > >
> > > _________________________________________________________
> > > Michael Sweet, Senior Printing System Engineer, PWG Chair
> > >
> > >
> > >
> > >
> > > --
> > > -Alex
> >
> > _________________________________________________________
> > Michael Sweet, Senior Printing System Engineer, PWG Chair
> >
> >
> >
> >
> > --
> > -Alex
>
> _________________________________________________________
> Michael Sweet, Senior Printing System Engineer, PWG Chair
>
>


-- 
-Alex
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.linuxfoundation.org/pipermail/printing-architecture/attachments/20141006/f951c3b3/attachment-0001.html>