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
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

X Version 11 libX11 1.8.10 XFontSetExtents(3)