Re: [evince] How do I script Evince for rendering assessment?

[David Kastrup <dak gnu org>]

Germán Póo-Caamaño <gpoo gnome org> writes:

> On Wed, 2013-04-17 at 11:26 +0200, David Kastrup wrote:
> > Hi,
> >
> > I need to check the renderings of various viewers for various output
> > systematically.
> >
> > So I call the viewer in a script with a specific magnification, use xwd
> > to dump its window contents and then process the dumps at various
> > magnifications.
> >
> > Evince appears to be quite useless for that, and going through the issue
> > reports makes it look as though its creators are proud of this "we know
> > better than you what you want" attitude.
> > [...]
>
> If you want to check rendering, then it is pointless to use Evince for
> that. Evince is just a shell and you might get different results
> depending of the version of poppler you have installed.
>
> Instead, you should use pdftocairo, which has the options you are
> looking for.

Evince and Frescobaldi (a LilyPond shell) both use the same version of
libpoppler for their screen rendering on my system, with strikingly
different appearance and quality in output.

Your advice certainly has merit as it provides a way for making
script-based comparisons in a reliable and repeatable manner.

It's just not clear what one would have to do to make those reflect the
output of different poppler-using applications reliably.

-- 
David Kastrup