[poppler] Kerning pair information help

[Steve W]

Yes, I'm using embedded fonts. I've looked the the pdf itself and
 understand that there is no kerning information there.

It looks like some pdf creators automatically break up the text into
different groups to handle kerning, but others do not. I'm trying to access
the kerning information in the latter case in poppler. I've confirmed that
it renders correctly by comparing to adobe acrobat reader, I just need
pointed in the right direction regarding the source.

Are there no character pair mappings that contain this information in
poppler?

-Steve

2011/8/11 suzuki toshiya <mpsuzuki at hiroshima-u.ac.jp>

> Hi Steve,
>
> Excuse me, do you assume that PDF (or embedded font in PDF)
> has some kerning information and PDF rendering system should
> reflect it?  I'm afraid that PDF itself does not have, and,
> embedded font in PDF may have it but they are simply ignored.
> If you find some kerning feature that is specified in official
> PDF spec and unimplemented in poppler, please let me know.
>
> I guess, PDF production system should tune the glyph positions
> strictly, and should not ask PDF rendering systems to reflect
> some kerning.
>
> Regards,
> mpsuzuki
>
> Steve W wrote:
> > I'm new to poppler and am trying to get a grasp of the source code. I'm
> > trying to find where the kerning pair information can be accessed via
> > poppler. Obviously poppler has access to it somewhere, as font's with
> > kerning information are rendered correctly in pdftoppm...
> >
> > I tried searching for 'kerning' and other related terms, but haven't
> found
> > anything.
> >
> > I'd greatly appreciate it if someone could point me to the relevant
> function
> > or source file to get met started.
> >
> > Thanks
> > -Steve
> >
> >
> >
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>
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