Hello,

I am obviously not a maintainer, but here a my two cents anyway: Just
from reading this and hence assuming that OPVP is to become generally
relevant, I think upstreaming the OPVPOutputDevice and possibly even
making pdftoopvp part of poppler-utils sounds like the most reasonable
course of action and would be more or less parallel to the already
existing PostScript output device and utility program.

Best regards, Adam.

Am 02.12.2016 um 01:37 schrieb suzuki toshiya:
> Dear Poppler maintainers,
> 
> I would like to hear your comments about the possibility
> of the disclosure of functions used "in" libpoppler, like,
> Goo, Fofi and Splash (if there was some discussion in the
> past, please give me the pointer to there).
> 
> It could be useful for the developers who want to make
> their own new OutputDevice, out of libpoppler. Or, it is
> better for the developers to propose new OutputDevice to
> be included by future release of libpoppler, rather than
> making external library referring private functions?
> 
> --
> 
> Recently, CUPS developers discussed about the future of the
> filter "pdftoopvp". OPVP is an API set for the non-PostScript
> printers discussed by the engineers in OpenPrinting consortium
> under Linux Foundation (OPVP is not yet another PDL).
> 
> Also Ghostscript supports OPVP output, some engineers
> regarded Ghostscript is overkilling for pdf-to-opvp data flow,
> and using Poppler would be more compact & straightforward.
> 
> However, libpoppler has no officially-exposed APIs to make
> user-defined OutputDevice. Thus, pdftoopvp filter links to
> private functions in libpoppler, to make OPVPOutputDevice
> (basically it is a diversion of SplashOutputDevice).
> 
> Some people have concerns that linking private functions
> might be risky, because nobody guarantees the compatibility.
> 
> Thus, I want to ask the questions in the beginning. Is
> there any possibility for libpoppler to expose some internal
> functions for user-defined OutputDevice developers, or,
> they should propose their OutputDevice to libpoppler?
> 
> I hope to hear your opinions.
> 
> Regards,
> mpsuzuki
> 
> _______________________________________________
> poppler mailing list
> poppler@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/poppler
> 

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