[bug #55107] PDFPIC: .psbb: support extraction of MediaBox from pdf files

[Keith Marshall]

Follow-up Comment #9, bug #55107 (project groff):

Branden,

[comment #7 comment #7:]
> > but troff then incurs the overhead of setting up an IPC pipeline, to
capture the preprocessor output, then fork the preprocessor,
> 
> groff already handles all of this.
I don't think that it does...
> Some of the most important bits are:
> 
>
https://git.savannah.gnu.org/cgit/groff.git/tree/src/roff/groff/groff.cpp#n54
>
https://git.savannah.gnu.org/cgit/groff.git/tree/src/roff/groff/groff.cpp#n576
> https://git.savannah.gnu.org/cgit/groff.git/tree/src/roff/groff/pipeline.c
> 
> ...or I am badly misunderstanding you.
Consider pre-grohtml; that *isn't* run within groff's normal pipeline; it is
forked, with its own subsidiary pipeline, as and when required.  One of my
earliest contributions to groff was to make that subsidiary pipeline setup,
and the associated fork, MS-Windows compatible, and I would anticipate a
similar overhead, if psbb were to be delegated to a preprocessor.


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