[XeTeX] List of ligatures in a font

[Herbert Schulz]

On Mar 15, 2012, at 7:34 AM, Philip TAYLOR wrote:

> 
> 
> Zdenek Wagner wrote:
> 
>> 2012/3/14 Peter Dyballa<Peter_Dyballa at web.de>:
> 
>>> Check the code points in the font! The statement
>>> 
>>>        \defaultfontfeatures{Mapping=tex-text}
>>> 
>>> informs the XeTeX engine to use the standard ligatures, as TeX would do by default.
>>> 
>> This mapping instruct XeTeX to use the TECkit mechanism to replace
>> characters by ligatures in case they are not defined by GSUB tables in
>> the font. It does not say anything about ligatures already present in
>> the font nor does it list the contents of the GSUB tables.
> 
> Unfortunately, on a freshly-installed TeX Live 2011 with all
> current updates applied, the control sequence is unknown :
> 
> %!TeX Program=XeTeX
> \magnification 4000
> 
> \defaultfontfeatures {Mapping=tex-text}
> 
> ->
> 
> This is XeTeX, Version 3.1415926-2.3-0.9997.5 (Web2C 2011)
> restricted \write18 enabled.
> entering extended mode
> (./Whitehurst.tex
> ! Undefined control sequence.
> l.4 \defaultfontfeatures
>                        {Mapping=tex-text}
> ?
> 
> Could an expert advise, please ?
> Philip Taylor


Howdy,

That command is defined in the fontspec package used in xelatex processing. I'm not sure how, or even if, you can call it in Plain xetex.

Good Luck,

Herb Schulz
(herbs at wideopenwest dot com)