X11R6

NAME

XFontSetExtents − XFontSetExtents structure

DESCRIPTION

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(3X11) and XwcTextExtents(3X11) 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