[XeTeX] Superscript in Linux Libertine

[Will Robertson]

On 11/02/2008, at 7:22 PM, Till Rettig wrote:

> This shows it really clearly and what I was suspecting already: old  
> style numbers are not mapped to normal superscript numbers. I will  
> report it. But about the xetex side: Is there an easy way to have an  
> override directly in the code or is it more complicated to implement  
> this? I mean exactly what you mention that overrides the font  
> settings so that direction rules over variant forms.

For a quick fix, you search through the code in xltxtra you'll find  
the chunk of code

     \ifzf at icu
       \zf at check@ot at feat{+sups}%
       \if at tempswa
         {\addfontfeature{VerticalPosition=Superior}#1}%
       \else
         \fakesuperscript{#1}%
       \fi
     \else
       \fakesuperscript{#1}%
     \fi

and change

    {\addfontfeature{VerticalPosition=Superior}#1}

to
    {\fontspec[VerticalPosition=Superior]{\csname zf at family@fontdef 
\f at family\endcsname}#1}

(untested -- hopefully it works!)

Otherwise, until the Libertine fonts are fixed you could just load  
xltxtra without the smart superscript facilities:

   \usepackage[no-sscript]{xltxtra}

Hope this helps,
Will
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