XFontSetExtents(3X11)

     NAME
          XFontSetExtents - XFontSetExtents structure

     STRUCTURES
          The XFontSetExtents structure contains:

          typedef struct {
               XRectangle max_ink_extent;/* over all drawable characters */
               XRectangle max_logical_extent;/* over all drawable characters */
          } XFontSetExtents;

          The XRectangle structures used to return font set metrics
          are the usual Xlib screen-oriented rectangles with x, y
          giving the upper left corner, and width and height always
          positive.

          The max_ink_extent member gives the maximum extent, over all
          drawable characters, of the rectangles that bound the
          character glyph image drawn in the foreground color,
          relative to a constant origin.  See XmbTextExtents and
          XwcTextExtents for detailed semantics.

          The max_logical_extent member gives the maximum extent, over
          all drawable characters, of the rectangles that specify
          minimum spacing to other graphical features, relative to a
          constant origin.  Other graphical features drawn by the
          client, for example, a border surrounding the text, should
          not intersect this rectangle.  The max_logical_extent member
          should be used to compute minimum interline spacing and the
          minimum area that must be allowed in a text field to draw a
          given number of arbitrary characters.

          Due to context-dependent rendering, appending a given
          character to a string may change the string's extent by an
          amount other than that character's individual extent.

     SEE ALSO
          XCreateFontSet(3X11), XExtentsOfFontSet(3X11),
          XFontsOfFontSet(3X11)
          Xlib - C Language X Interface