XFontSetExtents(3) XLIB FUNCTIONS XFontSetExtents(3)
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 Xmb-
TextExtents and XwcTextExtents for detailed semantics.
The max_logical_extent member gives the maximum extent, over all draw-
able characters, of the rectangles that 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 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
X Version 11 libX11 1.6.9 XFontSetExtents(3)
xorg-libX11 1.6.9 - Generated Sun Oct 20 16:30:09 CDT 2019