I'm only interested in the source, and in a state that I can include them in pango itself. Please let me know when they are available.
Will do.
Oh, so style must be equal, except that Oblique and Italic match too, with a high penalty.
I reopened the bug (http://bugzilla.gnome.org/show_bug.cgi?id=564644). Added some text to the description of the function.