[cairo] Inserting duplex and tumble options in cairo postscript output

[Dov Grobgeld]

Thanks! This is what I was looking for. You indeed uncovered me having been
sleeping in a cave for the last 20 years. ;-)

​Dov​

On Thu, Aug 20, 2015 at 12:50 AM, Adrian Johnson <ajohnson at redneon.com>
wrote:

> On 19/08/15 22:41, Dov Grobgeld wrote:
> > I have recently ported my line printing program paps
> > (http;//github.com/dov/paps <http://github.com/dov/paps>) from my own
> > postscript generation to using cairo. One of the things I wonder is how
> > to insert tumble and duplex instructions in the generated postscript.
> > The postscript for duplex and tumple typically look as follows:
> >
> > statusdict /setduplexmode known
> > { statusdict begin setduplexmode end } {pop} ifelse
> > statusdict /settumble known
> > { statusdict begin settumble end } {pop} ifelse
> >
> > I suppose that I could add these statements through
> >
> > cairo_ps_surface_dsc_comment()
> >
> > but this looks quite ugly, as these statements are not dsc comments. So
> > is there another method?
>
> The DSC comment functions are used for selecting printer features. eg
>
>   cairo_ps_surface_dsc_comment(surface, "%%IncludeFeature: *Duplex
>   DuplexNoTumble");
>
> CUPS will replace this with the PostScript code to enable duplex
> extracted from the printer PPD.
>
> An example of enabling duplex can be seen in the pdftocairo code:
>
> http://cgit.freedesktop.org/poppler/poppler/tree/utils/pdftocairo.cc
>
>
> >
> > Regards,
> > Dov
> >
> >
> >
>
>
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