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 XRectangles used to return font set metrics are the usual Xlib screen-oriented XRectangles, 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 XmbTextExtents and XwcTextExtents for detailed semantics. 

The max_logical_extent member gives the maximum extent, over all drawable characters, of the rectangles which 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 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(), XExtentsOfFontSet(), XFontsOfFontSet(). 

Xlib Reference Manual