Sean,
> On Mar 4, 2019, at 4:34 PM, Sean Kau via ipp <ipp at pwg.org> wrote:
>> That's sensible behavior for the standard as applicable to printers. Is there a recommendation for client behavior? It seems like clients should prefer PDF since that should be smaller on the wire,
Generally speaking, if the Client can produce PDF then it should use it. However, if the Client is printing a JPEG image (without special layout) and the Printer accepts JPEG, it should send the JPEG and not try wrapping it in a PDF or rendering as PWG Raster.
That said, a Client should also handle the document-unprintable-error case and retry as raster if the PDF (or JPEG) fails. You can see this behavior in the CUPS ipp backend (where it tells cupsd to retry the job and use raster...)
>> On Mon, Mar 4, 2019 at 12:51 PM Kennedy, Smith (Wireless & Standards Architect) <smith.kennedy at hp.com <mailto:smith.kennedy at hp.com>> wrote:
> Good question, Sean. The reason for this is to set a baseline for interoperability. Some clients may not support PDF. So all Clients and Printers are required to support PWG Raster as a bare minimum. That way, there will always be some common document format that both can fall back to.
>> Smith
>>>> > On Mar 4, 2019, at 1:26 PM, Sean Kau via ipp <ipp at pwg.org <mailto:ipp at pwg.org>> wrote:
> >
> > Question about the IPP Everywhere specification:
> >
> > Why do we require that printers support PWG-Raster if it can accept PDF? Is this to improve compatibility with clients? I tried to look through the archives and couldn't find any commentary.
> >
> > --
> > Sean Kau
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>>>> --
> Sean Kau
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_________________________________________________________
Michael Sweet, Senior Printing System Engineer
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