XExtentsOfFontSet - obtain the maximum extents structure for a font set

font_set  Specifies the font set.

       The XExtentsOfFontSet function returns an XFontSetExtents structure for the fonts used by the Xmb and Xwc
       layers for the given font set.

       The  XFontSetExtents  structure  is  owned by Xlib and should not be modified or freed by the client.  It
       will be freed by a call to XFreeFontSet with the associated XFontSet.  Until freed, its contents will not
       be modified by Xlib.

       XExtentsOfFontSet - obtain the maximum extents structure for a font set

XCreateFontSet(3), XFontsOfFontSet(3), XFontSetExtents(3)
       Xlib-CLanguageXInterface

X Version 11                                      libX11 1.8.12                             XExtentsOfFontSet(3)

       XFontSetExtents *XExtentsOfFontSet(XFontSet font_set);