The `--input-page-ranges` option needs to be ported to current, PDFio-based libcupsfilters

[tillkamppeter]

@uddhavphatak on your replacement of QPDF use to PDFio use in libcupsfilters (#71) you have dropped the new --input-page-ranges option which got added by OpenPrinting/cups-filters#444 to fix OpenPrinting/cups-filters#365. Could you re-introduce it?

@ValdikSS wrote in OpenPrinting/cups-filters#690:

I just accidentally discovered input-page-ranges option which does exactly what the user expects with number-up, and has been contributed in OpenPrinting/cups-filters#444 as a way to fix OpenPrinting/cups-filters#365 (which is the same bug report as this one).

-o number-up=2 \
-o input-page-ranges=3-4 \

to print pages 3 and 4 in a single page.

It is supported only in cups-filters/libcupsfilters 2.0.x and 2.1.x (QPDF-based).

It haven't been backported to 1.x, and also not supported with the fresh PDFio-based pdftopdf (yet, as of libcupsfilters 2.2.1 release).
I've mentioned it in #239 (comment), ideally it should be ported to PDFio pdftopdf as well.

[KHARSHAVARDHAN-eng]

Hi @tillkamppeter, I’d be interested in working on this issue. I’d like to investigate the previous QPDF-based implementation and port the --input-page-ranges functionality to the current PDFio-based implementation, along with appropriate regression tests. Is this still available for someone to pick up?

[uddhavphatak]

Hi @KHARSHAVARDHAN-eng, you can take a look into this issue, you need to look through cfFilterOptionsCreate(), and add the
--input-page-ranges filter inside.