Re: [ft-devel] PDF text rendering error

[suzuki toshiya]

Johnson Y. Yan wrote (2012/06/11 16:03):
> Werner and Toshiya-san,
>
> I  put the font as a tricky font to deal with.
> static const char trick_names[TRICK_NAMES_COUNT]
>                                  [TRICK_NAMES_MAX_CHARACTERS + 1] =
>     {
>       "DFKaiSho-SB",     /* dfkaisb.ttf */
>       "DFKaiShu",
>       "DFKai-SB",        /* kaiu.ttf */
>       "HuaTianKaiTi?",   /* htkt2.ttf */
>       "HuaTianSongTi?",  /* htst3.ttf */
>       "MingLiU",         /* mingliu.ttf & mingliu.ttc */
>       "PMingLiU",        /* mingliu.ttc */
>       "MingLi43",        /* mingli.ttf */
>   "BKLGIB+FA"     ---------------------------------------- this is the embeded 
> font in th document.
>     };
> it still render error. .

Including the randomization prefix to the tricky font name list is bad idea.

> I opened the embeded font use font lab, found the gid = 2134 is like this, 
> please see the attach bitmap,
> some of lines form a 0 area areas, then fill the area(have no area), Does 
> freetype made special processing?
>
>  
>
> Johnson Y. Yan
>
>
>
> 发件人： Werner LEMBERG
> 发送时间： 2012-06-11 12:55:42
> 收件人： yinsen_yan
> 抄送： freetype-devel; mpsuzuki
> 主题： Re: PDF text rendering error
>
> > Do you mean the font must be rendered use
> > TT_CONFIG_OPTION_BYTECODE_INTERPRETER?
> No, the FreeType *library* must be built with it: Edit ftoption.h to
> set this flag, then recompile.
> Additionally, hinting must be enabled for this font, this is,
> FT_LOAD_NO_SCALE doesn't work here.
> Normally, those steps are (more or less) handled automatically by
> FreeType, since we maintain a list of `tricky' font like the one you
> have encountered in the PDF; see file `ttobjs.c'.  The subsetted font
> in question, however, which identifies itself as
>   BKLGIB+FA-RoundGothicB
>   ＦＡ 丸ゴシックＢ and FA-RoundGothicB are trademarks of NEC Office Systems,Ltd.
> isn't in this list; for the NEC FA fonts (and others), a second
> mechanism is used which doesn't work with subsetted fonts.
> Toshiya-san, any ideas?
>     Werner