---
name: "wayland_server_region_t"
section: "3"
platform: "linux"
package: "waylandpp-dev"
version: "1.0.0-6+b2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/wayland_server_region_t"
---

# wayland\_server\_region\_t(3)

region interface

## NAME

wayland::server::region\_t - region interface

## SYNOPSIS

`#include <wayland-server-protocol.hpp>`

Inherits wayland::server::resource\_t.

### Public Member Functions

std::function\< void()\> & **on\_destroy** ()\
 destroy region  std::function\< void(int32\_t, int32\_t, int32\_t, int32\_t)\> & **on\_add** ()\
 add rectangle to region  std::function\< void(int32\_t, int32\_t, int32\_t, int32\_t)\> & **on\_subtract** ()\
 subtract rectangle from region  bool **proxy\_has\_object** () const\
 Check whether this wrapper actually wraps an object.  void **post\_no\_memory** () const\
 uint32\_t **get\_id** () const\
 client\_t **get\_client** () const\
 unsigned int **get\_version** () const\
 std::string **get\_class** ()\

## Detailed Description

region interface

A region object describes an area.

Region objects are used to describe the opaque and input regions of a surface.

Definition at line **4042** of file **wayland-server-protocol.hpp**.

## Member Function Documentation

### std::string wayland::server::resource\_t::get\_class ()` [inherited]`

Retrieve the interface name (class) of a resource object.

**Returns**

Interface name of the resource object.

### client\_t wayland::server::resource\_t::get\_client () const` [inherited]`

Get the associated client

**Returns**

the client that owns the resource.

### uint32\_t wayland::server::resource\_t::get\_id () const` [inherited]`

Get the internal ID of the resource

**Returns**

the internal ID of the resource

### unsigned int wayland::server::resource\_t::get\_version () const` [inherited]`

Get interface version

**Returns**

Interface version this resource has been constructed with.

### std::function\< void(int32\_t, int32\_t, int32\_t, int32\_t)\> & region\_t::on\_add ()

add rectangle to region

**Parameters**

*x* region-local x coordinate \
 *y* region-local y coordinate \
 *width* rectangle width \
 *height* rectangle height

Add the specified rectangle to the region.

Definition at line **3048** of file **wayland-server-protocol.cpp**.

### std::function\< void()\> & region\_t::on\_destroy ()

destroy region Destroy the region. This will invalidate the object ID.

Definition at line **3042** of file **wayland-server-protocol.cpp**.

### std::function\< void(int32\_t, int32\_t, int32\_t, int32\_t)\> & region\_t::on\_subtract ()

subtract rectangle from region

**Parameters**

*x* region-local x coordinate \
 *y* region-local y coordinate \
 *width* rectangle width \
 *height* rectangle height

Subtract the specified rectangle from the region.

Definition at line **3054** of file **wayland-server-protocol.cpp**.

### void wayland::server::resource\_t::post\_no\_memory () const` [inherited]`

Post 'not enough memory' error to the client

If the compositor has not enough memory to fulfill a certail request of the client, this function can be called to notify the client of this circumstance.

### bool wayland::server::resource\_t::proxy\_has\_object () const` [inherited]`

Check whether this wrapper actually wraps an object.

**Returns**

true if there is an underlying object, false if this wrapper is empty

## Author

Generated automatically by Doxygen for Wayland++ from the source code.