f->xftfont = CreateXftFont(font, angle);
    f->filename = NULL;
    f->ascent = (int16)f->xftfont->ascent;                                          
    f->descent = (int16)f->xftfont->descent;

    f->xftfont = CreateXftFont(font, angle);
    if (f->xftfont) return NULL;

Draw.h:

  void       Retain(const FontInfo& f) { ptr = f.ptr; ptr->count++; charset = f.charset; }

0x0033fa68 in Upp::FontInfo::GetAveWidth (this=0xbffe4080) at Draw.h:316
316		int        GetAveWidth() const                { return ptr->avewidth; }