[XeTeX] Brioso Pro and ligature strangeness

[Jonathan Kew]

On 13 Sep 2004, at 11:50 pm, Stephen Moye wrote:

> I have made the discovery that when I am using XeTeX, that I am 
> getting Brioso Pro OT "dlig" characters all the time. I have this in 
> the document:
>
> \font\rm="Brioso Pro" at 14pt \rm
>
> I get ligatures such as ct and sp. I have tried "Brioso Pro:-dlig" and 
> c{}t -- all to no avail.
>

It seems that the "sp", at least, is part of the "clig" (not "dlig") 
feature in Brioso Pro; I'm not seeing a "ct" occurring in the version I 
have.

You're right that ligatures will still form across something like 
"s{}p"; actually, I believe that could happen with regular TeX (.tfm) 
ligatures, too, when the word gets reconstituted after attempted 
hyphenation. (See The TeXbook, page 306.) You can say "s{\kern0pt}p" to 
make sure it doesn't happen, or turn off the "clig" feature!

Another way to prevent the ligature *ought* to be by inserting 
^^^^200c, the Unicode Zero-Width Non-Joiner, but it seems that Brioso 
Pro doesn't support this character. :-(

HTH,

JK