Resizing a JPEG image for printing (usingCUPS Library)

[Tom Morrison]

Hi,

I am struggling with find a method that sets the document-format attribute
of the job request (ipp_t). I am using as a framework the ipptest, and I
don't see a public API that supports this?

Any suggestions?

Tom

> Hi Michael...
>
> It never got to more than 1 page - I just assumed that it would...
>
> Even though it has a photo tray, its not going there, but, as you indicated
> I was NOT sending image/jpeg for document format - I will try that next and
> report back!
>
> Thank you Michael!
>
> Tom
>
> > Tom,
> >
> > I've never seen a HP printer scale and print an image on multiple pages all on its own.  What exactly are you seeing?  The image, or garbage printing on multiple pages?
> >
> > If you are feeding the JPEG directly to the printer via IPP, then it *should* normally print it from the photo tray and scale to fill (for HP inkjet printers) or centered/scaled on the default/specified media (for HP laser printers).  Just be sure to specify a document-format value of "image/jpeg" so the printer knows what you are sending it - not all HP printers support auto-sensing via IPP.
> >
> > The "media" and "media-col" Job Template attributes are used to specify the size/media to use for the print job.  The "ipp-attribute-fidelity" operation attribute can be used to force scaling to that size (although I think most HP inkjet printers ignore this when printing from the photo tray and just use the detected size...)
> >
> >
> > On 2012-09-25, at 10:22 AM, Tom Morrison <tom.morrison at smith-nephew.com> wrote:
> >
> > > Hi
> > >
> > > I have successfully cross-compiled the CUPS 1.4.5 library (libcups.a) to the ARM 9 platform and I have a (720x480) jpeg image that Further, I have successfully) printed to my local wireless HP printer.
> > >
> > > The problem is that the physical image that the printer 'thinks' it is is HUGE (multi-pages) - I can't do this to my user. In fact, my ideal is to print this at different sizes (based upon user input).
> > >
> > > Are there any attributes that I could add to the IPP request in order to have the printer 'resize' this image could be printed on a single page?
> > >
> > > Any suggestions for a direction ot investigate?
> > >
> > > Tom
> > > _______________________________________________
> > > cups mailing list
> > > cups at easysw.com
> > > http://lists.easysw.com/mailman/listinfo/cups
> >
> > __________________________________________________
> > Michael Sweet, Senior Printing System Engineer, PWG Chair
> >
>