---
name: "XEmptyRegion"
section: "3x"
platform: "linux"
package: "libx11-dev"
version: "4.3.0.dfsg.1-14sarge7"
release: "Debian 3.1 (Sarge)"
platforms: ["linux"]
url: "https://new.carta.tech/XEmptyRegion/3x"
---

# XEmptyRegion(3x)

determine if regions are empty or equal

## NAME

XEmptyRegion, XEqualRegion, XPointInRegion, XRectInRegion - determine if regions are empty or equal

## SYNTAX

Bool XEmptyRegion(Region *r*);

Bool XEqualRegion(Region *r1*, Region *r2*);

Bool XPointInRegion(Region *r*, int *x*, int *y*);

int XRectInRegion(Region *r*, int *x*, int *y*, unsigned int *width*, unsigned int *height*);

## ARGUMENTS

- *r*

  Specifies the region.

- *r1*

  - *r2*

  Specify the two regions.

- *width*

  - *height*

  Specify the width and height, which define the rectangle. or the coordinates of the upper-left corner of the rectangle

- *x*

  - *y*

  Specify the x and y coordinates, which define the point.

## DESCRIPTION

The *XEmptyRegion* function returns *True* if the region is empty.

The *XEqualRegion* function returns *True* if the two regions have the same offset, size, and shape.

The *XPointInRegion* function returns  *True* if the point (x, y) is contained in the region r.

The *XRectInRegion* function returns *RectangleIn* if the rectangle is entirely in the specified region, *RectangleOut* if the rectangle is entirely out of the specified region, and *RectanglePart* if the rectangle is partially in the specified region.

## SEE ALSO

XCreateRegion(3X11), XIntersectRegion(3X11)\
 *Xlib - C Language X Interface*