RrFont *RrFontOpenDefault (const RrInstance *inst);
void RrFontClose (RrFont *f);
RrSize *RrFontMeasureString (const RrFont *f, const gchar *str,
RrFont *RrFontOpenDefault (const RrInstance *inst);
void RrFontClose (RrFont *f);
RrSize *RrFontMeasureString (const RrFont *f, const gchar *str,