[poppler] auto switching of TrueType hinter for Type42/Type11 font in PDF

[Albert Astals Cid]

A Dijous, 26 d'agost de 2010, mpsuzuki at hiroshima-u.ac.jp va escriure:
> Hi,
> 
> I put a Subject for the discussion about the question:
> which library should work for this problem? freetype2?
> poppler? or both of them?
> 
> On Wed, 25 Aug 2010 19:35:34 +0100
> 
> Albert Astals Cid <aacid at kde.org> wrote:
> >A Dimecres, 25 d'agost de 2010, mpsuzuki at hiroshima-u.ac.jp va escriure:
> >> >So, how can I fix poppler on my computer?
> >> >Or do I need to wait until the next release of poppler?
> >> 
> >> About your own solution, there are several ways.
> >> 
> >> 1) Modify application personally.
> >> 
> >> This is Cobra suggestion for Qt4 application. Although
> >> poppler-qt4 has a switch to enable hinting in all fonts
> >> in a document (disabled by default), Okular does not
> >> touch the switch. So the insertion of the enabling of
> >> the switch will improve the quality of Okular result
> >> for PDF including MingLiU.
> >
> >That is giving the user the responsability of making things work, as a
> >last resort is acceptable but not the best solution in my opinion. In my
> >opinion things "should work" without user interaction, and that means
> >that either FreeType or poppler need to make "things work" automatically,
> 
> Thank you for comment. I agree. The 3 "solutions" are
> proposed as the personal solution without waiting for
> other libraries upgrades. In fact, at the end of the post,
> 
> I wrote as:
> >> Therefore, I'm trying to propose a fix that can be
> >> accepted by the maintainers officially.
> 
> In next,
> 
> >and in my
> >opinion FreeType makes more sense just for the reason that is lower in the
> >stack and improvememnts there will mean improvements everywhere, not just
> >in poppelr.
> 
> again I'm glad to hear your opinion. As I've written in
> previous post:
> 
>   http://lists.freedesktop.org/archives/poppler/2010-August/006286.html
> 
> it is difficult for FreeType2 to determine hinting is
> required /or not for an embedded True42/Type11 without
> "name" table, because FreeType2 does not receive reliable
> identifier. 

I see in the freetype thread between you and David Bevan that fonts without 
name are identified as tricky automatically (or when he says "our code" he 
doesn't mean FreeType but some other code), if so, is that enough?

> The additional information from PDF parser
> layer is expected. The auto switching of the hinter for
> the tricky font is generic problem, as you wrote, but
> I think the handling of TrueType without of "name" table
> issue is PDF specific issue. How do you think of?

As said, i'd prefer freetype doing the job, because it's one centralized 
place, if it is not techically possible yeah, then we'll have to do it on 
poppler :D

Albert

> 
> Regards,
> mpsuzuki
> 
> P.S.
> Just I've started the experiment to identify the tricky
> font without "name" table, but it's just experiment.
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