Ghostscript and new PDF interpreter (was: Missing items to make Cairo ready)

[Jonas Hahnfeld]

[ replying on the topic of the new PDF interpreter alone because it
really bothers me that you keep making wrong claims in that regard ]

On Wed, 2023-01-04 at 15:13 +0000, Werner LEMBERG wrote:
> > With extractpdfmark
> > ===================
> > 
> > PS backend:
> > 
> > 4,8M    Documentation/out-www/en/notation.pdf
> 
> FYI: Using a recent GS version with its new PDF backend, the size
> gets larger than 20MByte.  I guess this is a bug, and I will soon
> report this to the GS people so that it gets fixed in the next GS
> version (in March), which will eventually drop the old PDF engine
> completely.
> 
> On the other hand, GS's new PDF engine no longer contains a PS
> interpreter; it is possible that `extractpdfmark` doesn't work
> anymore, and we have to find something new...

This is wrong, or at least the new PDF *interpreter* (which is, in my
understanding, not to be confused with the PDF driver to output PDF) in
itself is not to blame here: The new interpreter was already enabled by
default in Ghostscript 9.56 and this version still works perfectly
fine, yielding small PDF sizes together with extractpdfmark.

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