[Pkg-fonts-devel] Bug#573125: otf-ipafont provides ttf

Atsuhito Kohda kohda at pm.tokushima-u.ac.jp
Mon Mar 15 12:35:45 UTC 2010

Hi Yamane-san,

On Sat, 13 Mar 2010 21:42:54 +0900, Hideki Yamane wrote:

> On Tue, 09 Mar 2010 23:07:58 +0900 (JST)
> Atsuhito Kohda <kohda at pm.tokushima-u.ac.jp> wrote:
>> With XeTeX, OpenType fonts support vertical typesetting very well 
>> but TrueType fonts don't.  On the contrary, OpenType fonts make 
>> XeTeX/LuaTeX to run very slowly but TrueType fonts make them
>> to run fast.
>  It seems the problem in XeTeX/LuaTex, we cannot identify whether it is
>  OpenType font or not with just its extensions. As I said, OpenType spec
>  allows us to use .ttf extensions for OpenType font. 
>  Anyway, I want to deal with this (yes, sure). But add some tricks to detect
>  OpenType (I don't know how to do ;) to those TeX implementations is better way
>  to solve this. How about this?

I'm not sure but don't you think that TeX detects *.otf as
OpenType and *.ttf as TrueType fonts?  If so, it is not 
what I wanted to explain.

If IPA ver.3 and ver.2 use the same ipam.ttf then,
on a system with IPA ver.3, TeX will output vertical
typesettings correctly but will run slowly.
On the other hand, on a system with IPA ver.2,
TeX will fail to output vertical typesettings correctly
but will run rapidly.
I think this is unreasonable and confusing.

If I misunderstand you, I'm very sorry.

Best regards,	   	    2010-3-15(Mon)

 Debian Developer - much more I18N of Debian
 Atsuhito Kohda <kohda AT debian.org>
 Department of Math., Univ. of Tokushima

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