[poppler] pdftohtml does not preserve fonts

Wed Oct 26 08:14:09 PDT 2011

Sure, but I reproduce there are (I believe) two issues here :  
1) justification is more complicated with webkit due to not (really) working optimizeLegibility in WebKit and the fact that WebKit handles poorly decimal in word-spacing and not at all in letter-spacing
2) due to kerning (I can send you a screenshot comparing in Photoshop two texts one over the other) / letter-spacing / word-spacing (?), lines are much longer in WebKit => hence, if you have for example "footnotes" as in this PDF, they don't get at the right place in the text (all the more so as if you have a PDF from an InDesign export, there may be "metrics" which cause some text to go over another — yet, you can always remove all metrics before exporting in PDF…it avoids part of the issue)  

NB : I don't manage to get the fonts extracted to work, but I can send those to you in otf if you want (don't know if extraction is not working due to my installation ?)  

PDF file : BugWebkit.pdf (http://cl.ly/0L3g2I1r3G2a0T0o3622)  

--  
Clément Wehrung
06 88 10 65 91

Le mercredi 26 octobre 2011 à 14:35, Clément Wehrung a écrit :

> You can understand better the issue here (Firefox vs Safari on Mac/iOS)
>  
> http://dev.nurves.com/pdf2html/-6.html
>  
> Cf. footnotes
>  
> WebKit.png (http://cl.ly/3c1B2V1X2u2C2f0M2L0L)
> Firefox.png (http://cl.ly/0Q111C3u2g3T2U1D3U2u)
> --  
> Clément Wehrung
> 06 88 10 65 91
>  
>  
>  
> Le mercredi 26 octobre 2011 à 14:26, Clément Wehrung a écrit :
>  
> > Hi Josh,
> >  
> > Thanks for all this. I'm already looking at the code now, but I've run into some issues with webkit rendering compared to Firefox (where it looks really amazing !). I know webkit has a bug with letter-spacing (does not take decimal into account) but there's more to it since text-rendering:optimizeLegibility; only partly works. I try to see how we could get text boxes not to end up one over the other. I can show you some screenshots if you want.  
> >  
> > btw, when have you chosen not to use only the background image for all graphics ? is it in order to achieve some image over text ?
> >  
> > Thanks,  
> >  
> > Clement  
> >  
> > --  
> > Clément Wehrung
> > 06 88 10 65 91
> >  
> > Le mardi 25 octobre 2011 à 00:41, Josh Richardson a écrit :
> >  
> > > Ok, sent you a read-only access invitation for now.  Thanks for your offer to help.  Here is my bigger issues list to get a flavor – a lot of fun things to do.  Let me know what you want to do with pdftohtml!
> > >  
> > > Translate drawing operations into canvas with SVG
> > > Find better way to calculate vertical positioning, by looking at browser source code
> > > z-index handling -- currently text is never masked by graphics
> > > Algorithmic extraction of TOC
> > > Algorithmic extraction of page numbering (Alec may be working on this)
> > > Algorithmic identification of chapters
> > > Right-to-left text, proper display (e.g. Arabic, Hebrew)
> > > Algorithmic detection of text flow (Stephen may be working on this)
> > > Detection / removal of duplicate images
> > > Jpg vs. png selection; automatically choose the best format for each image
> > >  
> > >  
> > > --josh
> > >  
> > > From:  Clément Wehrung <cwehrung at nurves.com (mailto:cwehrung at nurves.com)>
> > > Date:  Mon, 24 Oct 2011 15:27:23 -0700
> > > To:  Josh Richardson <jric at chegg.com (mailto:jric at chegg.com)>
> > > Cc:  "poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)" <poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)>, Alec Taylor <alec.taylor6 at gmail.com (mailto:alec.taylor6 at gmail.com)>
> > > Subject:  Re: [poppler] pdftohtml does not preserve fonts
> > >  
> > > Sure ! Do you have a link for the repo so that I can already have a look (I didn't figure out which one it is right now) ? I'm really interested in helping you, if you need something on any specific topic don't hesitate. Many thanks again,
> > >  
> > > Clément
> > >  
> > >  
> > > On Mon, Oct 24, 2011 at 8:01 PM, Josh Richardson <jric at chegg.com (mailto:jric at chegg.com)> wrote:
> > > > Can you give me a couple of days?  I want to try to get a repo hosted on,
> > > >  e.g. bitbucket, which is connected to my repo, so that it's easier to keep
> > > >  everything in synch.  Alec Taylor set up a repo there already, which you
> > > >  can use to get an immediate snapshot if needed.
> > > >  
> > > >  Best, --josh
> > > >  
> > > >  On 10/24/11 10:45 AM, "iclems" <cwehrung at nurves.Com (mailto:cwehrung at nurves.Com)> wrote:
> > > >  
> > > > >
> > > > >Dear Josh,
> > > > >
> > > > >Being working on a pdftohtml project which requires font preservation, I'd
> > > > >be really interested in getting this too. Do you think it's possible ?
> > > > >
> > > > >Thanks,
> > > > >
> > > > >Clement
> > > > >cwehrung at gmail.com (mailto:cwehrung at gmail.com)
> > > > >
> > > > >
> > > > >Josh Richardson wrote:
> > > > >>
> > > > >> Preserving fonts is not integrated into the master repository yet.  If
> > > > >>you
> > > > >> like, I can send you a patched version of Poppler which will do it.
> > > > >> You'll still have to run your own process (like Fontforge) to convert
> > > > >>the
> > > > >> fonts into a web-usable format, but it's straightforward as long as the
> > > > >> fonts have mapping to unicode, and doable even without.
> > > > >>
> > > > >> --josh
> > > > >>
> > > > >> From: M Naveed Akram <cmnajs at gmail.com (mailto:cmnajs at gmail.com)<mailto:cmnajs at gmail.com>>
> > > > >> Date: Fri, 30 Sep 2011 06:52:14 -0700
> > > > >> To:
> > > > >>"poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)<mailto:poppler at lists.freedesktop.org>"
> > > > >> <poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)<mailto:poppler at lists.freedesktop.org>>
> > > > >> Subject: [poppler] pdftohtml does not preserve fonts
> > > > >>
> > > > >> Hi,
> > > > >>
> > > > >> I have been using 0.16 release of poppler-utils, but I am facing a
> > > > >> problem. When converting pdf to html using pdftohtml it does not
> > > > >>preserve
> > > > >> fonts in the output html. How can I solve this issue. Please help
> > > > >>
> > > > >>
> > > > >> _______________________________________________
> > > > >> poppler mailing list
> > > > >> poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)
> > > > >> http://lists.freedesktop.org/mailman/listinfo/poppler
> > > > >>
> > > > >>
> > > > >
> > > > >--
> > > > >View this message in context:
> > > > >http://old.nabble.com/pdftohtml-does-not-preserve-fonts-tp32569116p3271208
> > > > >4.html
> > > > >Sent from the Free Desktop - poppler mailing list archive at Nabble.com (http://Nabble.com).
> > > > >
> > > > >_______________________________________________
> > > > >poppler mailing list
> > > > >poppler at lists.freedesktop.org (mailto:poppler at lists.freedesktop.org)
> > > > >http://lists.freedesktop.org/mailman/listinfo/poppler
> > > > >
> > > >  
> > >  
> >  
>  

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