[Bf-committers] GPencil I/O Project: Request to integrate libharu lib to export PDF format

[Campbell Barton]

By this logic we could blindly accept any patch that's had some production
testing, without considering long term maintenance.

It's possible alternative solutions that call out to existing well maintained
converters would have been fine in production too.
It's not that I'm pushing back against including this entirely,
I'm just not a fan of this "it worked in a production test - so lets
include it" -- attitude.

Over the years I believe we've spent significant time investigating
issues with 3rd party libraries (resource leaks, conflicting symbols,
linking problems, platform specific errors etc).
If there is a good chance we can avoid this entirely, it could be
worth looking into.

If we do include libharu, how would this be included?  in extern/ or
would we bundle it in SVN's lib?

On 12/10/20 8:26 PM, Dalai Felinto wrote:
> Hi,
>
> My suggestion would be the following:
>
> * Stick to libharu since it was proven that works for the intended use
> case.
> * Make sure libharu integration in the code goes via a layer of
> abstraction.
>
> So instead of trying now to solve an non-existent problem, we use
> development time to make sure the existing solution is robust enough to
> be replaced if needs be.
>
> Regards,
> Dalai
>
> On 09-12-2020 23:34, Campbell Barton via Bf-committers wrote:
>> rsvg-convert (which uses cairo), is a utility that converts SVG to
>> PDF, it can create multi-page PDF's from many SVG's too.
>>
>> If for some reason we need more control then a command line utility
>> provides, there are Python multiple options regarding bindings for
>> cairo & svg conversion.
>>  From what I can tell they can convert SVG to PDF quite easily.
>>
>> Regarding bundling the conversion tools, if this it's only a few
>> studios with specific requirements, we don't _necessarily_ need to
>> include the conversion utilities with Blender, although this is a
>> decision we could easily change.
>>
>> I'm not pushing for this as the final solution, just checking if it
>> might be a simpler option compared to taking on a PDF library that
>> isn't maintained anymore.
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>