[poppler] CJK problem

[Albert Astals Cid]

A Dimarts 03 Juliol 2007, vàreu escriure:
> This patch makes poppler be able to display glyphs for vertical text
> correctly.
> And it makes poppler be able to display many CJK glyphs that original
> code can't display.
>
>
> This patch works in creating CID-to-GID mapping.
> (1) Changes to CairoFontEngine.cc and SplashOutputDev.cc
>    Creating CID-to-GID mapping methods is in class GfxCIDFont.
>    So, removed duplicated code for creating CID-to-GID mapping from
>    CairoFontEngine.cc and SplashOutputDev.cc, and made it use code in
>    GfxCIDFont.
>
> (2) Changes to GfxCIDFont (GfxFont.cc)
>  (i) Using unicode cmap, convert CID to Unicode as original code.
>      But patched code uses CMap for vertical text besides Cmap for
>         horizontal text.
>      Also it uses ToUnicodeMap to convert glyphs not in the font file into
>        variant form glyphs.
>
>  (ii) convert Unicode to GID
>      If wmode is vertical, get GID for vertical text using GSUB table in
>        TrueType(Open Type) font.
>
> (3) Changes to fofi.
>      Added methods to look up GSUB table.

I commited the patch, i'm not going to pretend i understood/read all the 
patch, but most of it seemed ok and running some regression testing 
against "normal european" files i could not see any difference and it 
improves for you so it's a win-win situation. Thanks!

Albert


> Regards,
>
> Koji Otani
>
> From: Albert Astals Cid <aacid at kde.org>
> Subject: Re: [poppler] CJK problem
> Date: Mon, 2 Jul 2007 15:36:17 +0200
> Message-ID: <200707021536.18199.aacid at kde.org>
>
> aacid> On Friday 29 June 2007 05:13:35 Koji Otani wrote:
> aacid> > Hi, all.
> aacid>
> aacid> Hi
> aacid>
> aacid> > I'm Koji Otani, developing software for printing on Linux.
> aacid> > I've developed a program using poppler. I found some problems
> about aacid> > displaying CJK text.
> aacid> >
> aacid> > (1) poppler can't display Japanese vertical text correctly.
> aacid> > (2) poppler can't display many characters when displaying CID
> aacid> > characters.
> aacid> >
> aacid> > I've regsitered this problems and patch as Bug #11413 in Bugzilla.
> aacid> > Please check it if you are interestead in this.
> aacid>
> aacid> Thanks a lot about the patches, could you please explain what they
> do in aacid> a "easy to understand way"?
> aacid>
> aacid> Thanks again.
> aacid>
> aacid> Albert
> aacid>
> aacid> >
> aacid> > Reagrds,
> aacid> >
> aacid> > Koji Otani.
> aacid> > _______________________________________________
> aacid> > poppler mailing list
> aacid> > poppler at lists.freedesktop.org
> aacid> > http://lists.freedesktop.org/mailman/listinfo/poppler
> aacid>
> aacid>
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