RrSize *RrFontMeasureString (const RrFont *f, const gchar *str,
gint shadow_offset_x, gint shadow_offset_y,
gboolean flow, gint maxwidth);
RrSize *RrFontMeasureString (const RrFont *f, const gchar *str,
gint shadow_offset_x, gint shadow_offset_y,
gboolean flow, gint maxwidth);