[XeTeX] Superscript in Linux Libertine

[Will Robertson]

On 09/02/2008, at 9:39 PM, Till Rettig wrote:

> I tried recently to set a document with Linux Libertine (O) that  
> should
> have old style numbers. Apparently this caused the use of normal old
> style numbers also for superscript numbers (e.g. for footnotes).

I would argue that this is a bug in the font, but there's a chance  
it's XeTeX's fault instead (Jonathan?). Take a look how the font is  
interpreting the features:

\documentclass{article}
\usepackage{fontspec}
\begin{document}
\fontspec{Linux Libertine O}
[test 123]
\fontspec[Numbers=OldStyle]{Linux Libertine O}
[test 123]
\fontspec[VerticalPosition=Superior]{Linux Libertine O}
[test 123]
\fontspec[Numbers=OldStyle,VerticalPosition=Superior]{Linux Libertine O}
[test 123]
\end{document}

Or if you prefer in Plain XeTeX:

\font\x="Linux Libertine O:+onum" at 10pt\x [test 123]
\font\x="Linux Libertine O:+sups" at 10pt\x [test 123]
\font\x="Linux Libertine O:+onum,+sups" at 10pt\x [test 123]
\bye

Perhaps you could report this to the font maintainers? I believe that  
the sups feature should override the onum feature...

I'm not sure if there's much that xltxtra can do about this, besides  
adding a feature "\scriptfontfeatures{}" that overrides the features  
of the main text font. This isn't such a bad idea, actually. I'll work  
on it at some stage...

Cheers,
Will
-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 2415 bytes
Desc: not available
Url : http://tug.org/pipermail/xetex/attachments/20080211/83cc4716/attachment.bin