XFontSetExtents(3X11) X11R5 XFontSetExtents(3X11)NAMEXFontSetExtents - XFontSetExtents structure
STRUCTURES
The structure contains:
typedef struct {
XRectangle max_ink_extent; /* over all drawable characters */
XRectangle max_logical_extent; /* over all drawable characters */
} XFontSetExtents;
The used to return font set metrics are the usual Xlib screen-oriented
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 and
for detailed semantics.
The max_logical_extent member gives the maximum extent, over all draw‐
able characters, of the rectangles which 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 inter-line spacing and the mini‐
mum 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 ALSOXCreateFontSet(3X11), XExtentsOfFontSet(3X11), XFontsOfFontSet(3X11)
Xlib - C Language X Interface
XFontSetExtents(3X11)