---
name: "XFontSetExtents"
section: "3"
platform: "linux"
package: "libx11"
version: "1.8.14-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/XFontSetExtents"
---

# XFontSetExtents(3)

XFontSetExtents structure

## 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)](/XCreateFontSet/3.md), [**XExtentsOfFontSet**(3)](/XExtentsOfFontSet/3.md), [**XFontsOfFontSet**(3)](/XFontsOfFontSet/3.md)\
 *Xlib - C Language X Interface*