[ft] Coping a face into file from stream

[Pau Freixes]

Hi to all,

Well, i have a little problem because i need copy a font_face from a
valid true type file to another file or in memory for more later use
this in my internal render.

But i didn't search any documentation for do this, what's the better
solution for this problem and use freetype api ?

Thks to all

Pau