bionic (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