Howto use a GdkFont in Cairo?

["Clemens Eisserer" <linuxhippy gmail com>]

Hello,

I am trying to convert gtk_paint_string to use Cairo only.

However the Fonts which should be used is only available as GdkFont,
so I wonder whats the best way to use this GdkFont in Cairo.
Always looking up the font-name seems to add a lot of overhead :-/

Thank you in advance, lg Clemens