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XFontSetExtents

Section: XLIB FUNCTIONS (3)
Updated: libX11 1.6.3
Index Return to Main Contents
 

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


 

Index

NAME
STRUCTURES
SEE ALSO


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