XFontSetExtents man page on Ultrix

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XFontSetExtents(3X11)		     X11R5		 XFontSetExtents(3X11)

NAME
       XFontSetExtents - XFontSetExtents structure

STRUCTURES
       The structure contains:

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

       The used to return font set metrics are the usual Xlib screen-oriented
       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 which bound the character glyph image
       drawn in the foreground color, relative to a constant origin.  See and
       for detailed semantics.

       The max_logical_extent member gives the maximum extent, over all draw‐
       able characters, of the rectangles which specify minimum spacing to
       other graphical features, relative to a constant origin.	 Other graphi‐
       cal features drawn by the client, for example, a border surrounding the
       text, should not intersect this rectangle.  The max_logical_extent mem‐
       ber should be used to compute minimum inter-line spacing and the mini‐
       mum area which 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 increase the string's extent by an amount which exceeds the
       font's max extent:

       max possible added extent = (max_extent * <total # chars>) - prev_string_extent

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

							 XFontSetExtents(3X11)
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