XExtentsOfFontSet(3) XLIB FUNCTIONS XExtentsOfFontSet(3)NAME
XExtentsOfFontSet - obtain the maximum extents structure for a font set
SYNTAX
XFontSetExtents *XExtentsOfFontSet(XFontSet font_set);
ARGUMENTS
font_set Specifies the font set.
DESCRIPTION
The XExtentsOfFontSet function returns an XFontSetExtents structure for the fonts used by the Xmb and Xwc layers for the given font set.
The XFontSetExtents structure is owned by Xlib and should not be modified or freed by the client. It will be freed by a call to XFree-
FontSet with the associated XFontSet. Until freed, its contents will not be modified by Xlib.
SEE ALSO XCreateFontSet(3), XFontsOfFontSet(3), XFontSetExtents(3)
Xlib - C Language X Interface
X Version 11 libX11 1.5.0 XExtentsOfFontSet(3)
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XExtentsOfFontSet() XExtentsOfFontSet()
Name
XExtentsOfFontSet - obtain the maximum extents structure for a font set.
Synopsis
XFontSetExtents *XExtentsOfFontSet(font_set)
XFontSet font_set;
Arguments
font_set Specifies the font set.
Returns
A structure containing the extents.
Availability
Release 5 and later.
Description
XExtentsOfFontSet() returns an XFontSetExtents() structure for the given font set.
The XFontSetExtents() structure is owned by Xlib and should not be modified or freed by the client. It will be freed by a call to XFree-
FontSet() with the associated XFontSet. Until freed, its contents will not be modified by Xlib.
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(), XFontsOfFontSet().
Xlib - Text Output XExtentsOfFontSet()
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