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Re: [ft-devel] Question about charset.


From: Johnson Y. Yan
Subject: Re: [ft-devel] Question about charset.
Date: Fri, 19 Apr 2013 12:46:46 +0800

Thanks, Werner.
 
Johnson Y. Yan

发件人: Werner LEMBERG
发送时间: 2013-04-19 12:27:57
收件人: yinsen_yan
抄送: freetype-devel
主题: Re: [ft-devel] Question about charset.
 
> I mean that it likes 
> #define FT_WinFNT_ID_CP1252    0
> #define FT_WinFNT_ID_DEFAULT   1
> #define FT_WinFNT_ID_SYMBOL    2
> [...]
> defined in ftwinfnt.h, can these work for other type fonts, type1,
> CFF and so on.
No.  In general, FreeType only handles encodings, not charsets.
Additionally, information on the character sets within a font is
*very* unreliable.  For example, the Unicode block bits in the `OS/2'
table of TrueType fonts are set by font vendors rather arbitrarily.
They are just a possible iteration to the question: `Is this font
suitable for displaying this range?', and there is absolutely no
guarantee that all characters of this block are really available in
the font.
    Werner

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