[XeTeX] XeTeXuseglyphmetrics

[Ulrike Fischer]

Am Wed, 27 May 2009 15:40:43 +0200 schrieb SUN Wenchang:


>> I think a primitive like \XeTeXuseglyphmetrics is useful.  For
>> example, with \XeTeXuseglyphmetrics=1, the spaces around a CJK
>> glyph with be trimed, which is exact what I wanted. Once we have
>> such a primitive, it is easy to ! ;set punctuation glyphs,
>> including margin kerning and more.
   
 
> Sorry, I made a mistake. I mean a primitive LIKE
> \XeTeXuseglyphmetrics, say \XeTeXuseglyphbbox,   but not
> \XeTeXuseglyphmetrics  itself.



That would be only useful if the bbox of the chars in the font has
the correct values (and then you wouldn't have a problem as the
width is already used) but as you said they don't have them. 

\XeTeXuseglyphmetrics doesn't trim spaces, it doesn't change a bbox.
The bbox of each char is already in the font and with
\XeTeXuseglyphmetrics you can choose to use is or to ignore it and
use a generic value instead. Not more. 



-- 
Ulrike Fischer