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

[Peter Dyballa]

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...

--
Greetings

   Pete

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