Thanks so much,Tor.
I work on X11(Ubuntu).
And you are right,
"it's fontconfig that causes the fallback to
"AR PL New Sung""
I didn't know Gtk+ uses Pango as text tool before.
So , I will try to look into Pango now.
Thanks for your help !
2008/10/17 Tor Lillqvist <[EMAIL PROTECTED]>
> > Please tell me which file I shall trace.
>
> Trace? I asume you mean to ask what source code you need to browse and
> understand what it does?
>
> You didn't tell whether you are on X11 (Unix, including Linux, and
> also Cygwin) or Windows, For X11, you need to look into Pango and
> fontconfig. For Windows, just pango.
>
> As you mention Tahoma specifically, my first guess would be that you
> are on Windows, as Tahoma is the default UI font on XP, isn't it? One
> thing that will interest you then is the builtin_aliases table in the
> file pango/pango-utils.c in Pango. It contains the line:
>
> "tahoma = \"tahoma,arial unicode ms,lucida sans unicode,browallia
> new,mingliu,simhei,gulimche,ms
> gothic,sylfaen,kartika,latha,mangal,raavi\"",
>
> which means that when GTK+ ask for "tahoma", that alias list then says
> that it should use mingliu or simhei for Chinese, so I don't know why
> you get "AR PL New Sung". (Note that entries in the built-in aliases
> table can be overridden by an explicit pango.aliases file.) So maybe
> you are on X11 anyway, and it's fontconfig that causes the fallback to
> "AR PL New Sung"?
>
> Note that how font and glyph fallback works in Pango on Windows is not
> ideal at all. It would be much better if it worked more like on X11,
> and if the "native" fallback information that Windows itself uses
> would be taken into consideration, and no explicit alias table (either
> the built-in or a pango.aliases file) would be needed. There are a
> couple of bugs open against Pango on Windows for features that work on
> X11 but not Windows. Unfortunately the concepts and code is rather
> hard to understand and less documented than one would want, and the
> code is also ad-hoc to some extent (I take partial responsibility for
> that myself, of course)...
>
> --tml
>
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