[XeTeX] "Options for all fonts" : colo[u]r, and the transparency byte

Peter Dyballa Peter_Dyballa at Web.DE
Sun Jun 5 21:41:50 CEST 2011

Am 05.06.2011 um 21:24 schrieb Philip TAYLOR (Webmaster, Ret'd):

> So how is it, I am forced to ask, that an add-on package can achieve  
> something that the underlying
> engine cannot ?  This seems very odd to me.

The fontspec package does not use PDF specials which TiKZ/PGF uses.  
That's my simply explanation. It has built-in transparency support  
which is built-in into Mac OS X. Xdvipdfmx does not use this (yet).

> Unfortunately fontspec is targeted solely at (Xe)LaTeX users,  
> whereas Will
> Robertson's "/X/?/TEX reference guide/" is targeted at all users of  
> XeTeX and
> makes no mention under the entry for the extended syntax of \font that
> some of the options are not universally applicable, whence my  
> confusion.

It also supports LuaTeX. Since LuaTeX is connected somehow to ConTeXt,  
which can when based on the xetex engine produce transparency, it  
might be able to follow closely the fontspec documentation...



Give a man a fish, and you've fed him for a day. Teach him to fish,  
and you've depleted the lake.

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