---
name: "XIntersectRegion"
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/XIntersectRegion/3x"
---

# XIntersectRegion(3x)

region arithmetic

## NAME

XIntersectRegion, XUnionRegion, XUnionRectWithRegion, XSubtractRegion, XXorRegion, XOffsetRegion, XShrinkRegion - region arithmetic

## SYNTAX

int XIntersectRegion(Region *sra*, Region *srb*, Region *dr\_return*);

int XUnionRegion(Region *sra*, Region *srb*, Region *dr\_return*);

int XUnionRectWithRegion(XRectangle \**rectangle*, Region *src\_region*, Region *dest\_region\_return*);

int XSubtractRegion(Region *sra*, Region *srb*, Region *dr\_return*);

int XXorRegion(Region *sra*, Region *srb*, Region *dr\_return*);

int XOffsetRegion(Region *r*, int *dx*, int *dy*);

int XShrinkRegion(Region *r*, int *dx*, int *dy*);

## ARGUMENTS

- *dest\_region\_return*

  Returns the destination region.

- *dr\_return*

  Returns the result of the computation. ds Dy move or shrink

- *dx*

  - *dy*

  Specify the x and y coordinates, which define the amount you want to  the specified region.

- *r*

  Specifies the region.

- *rectangle*

  Specifies the rectangle.

- *sra*

  - *srb*

  Specify the two regions with which you want to perform the computation.

- *src\_region*

  Specifies the source region to be used.

## DESCRIPTION

The *XIntersectRegion* function computes the intersection of two regions.

The *XUnionRegion* function computes the union of two regions.

The *XUnionRectWithRegion* function updates the destination region from a union of the specified rectangle and the specified source region.

The *XSubtractRegion* function subtracts srb from sra and stores the results in dr\_return.

The *XXorRegion* function calculates the difference between the union and intersection of two regions.

The *XOffsetRegion* function moves the specified region by a specified amount.

The *XShrinkRegion* function reduces the specified region by a specified amount. Positive values shrink the size of the region, and negative values expand the region.

## SEE ALSO

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