oracular (3) XFontSetExtents.3.gz

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(3), XExtentsOfFontSet(3), XFontsOfFontSet(3)
       Xlib - C Language X Interface