Struct WlSubcompositor

pub struct WlSubcompositor { /* private fields */ }

Available on crate feature wayland and Linux only.

sub-surface compositing

The global interface exposing sub-surface compositing capabilities. A wl_surface, that has sub-surfaces associated, is called the parent surface. Sub-surfaces can be arbitrarily nested and create a tree of sub-surfaces.

The root surface in a tree of sub-surfaces is the main surface. The main surface cannot be a sub-surface, because sub-surfaces must always have a parent.

A main surface with its sub-surfaces forms a (compound) window. For window management purposes, this set of wl_surface objects is to be considered as a single window, and it should also behave as such.

The aim of sub-surfaces is to offload some of the compositing work within a window from clients to the compositor. A prime example is a video player with decorations and video in separate wl_surface objects. This should allow the compositor to pass YUV video buffer processing to dedicated overlay hardware when possible.

This interface has no events.

Implementations

impl WlSubcompositor

pub fn destroy(&self)

unbind from the subcompositor interface

Informs the server that the client will not be using this protocol object anymore. This does not affect any other objects, wl_subsurface objects included.

pub fn get_subsurface<U, D>( &self, surface: &WlSurface, parent: &WlSurface, qh: &QueueHandle<D>, udata: U, ) -> WlSubsurface

where U: Send + Sync + 'static, D: Dispatch<WlSubsurface, U> + 'static,

give a surface the role sub-surface

Create a sub-surface interface for the given surface, and associate it with the given parent surface. This turns a plain wl_surface into a sub-surface.

The to-be sub-surface must not already have another role, and it must not have an existing wl_subsurface object. Otherwise the bad_surface protocol error is raised.

Adding sub-surfaces to a parent is a double-buffered operation on the parent (see wl_surface.commit). The effect of adding a sub-surface becomes visible on the next time the state of the parent surface is applied.

The parent surface must not be one of the child surface’s descendants, and the parent must be different from the child surface, otherwise the bad_parent protocol error is raised.

This request modifies the behaviour of wl_surface.commit request on the sub-surface, see the documentation on wl_subsurface interface.

Trait Implementations

impl Borrow<ObjectId> for WlSubcompositor

fn borrow(&self) -> &ObjectId

Immutably borrows from an owned value.

impl Clone for WlSubcompositor

fn clone(&self) -> WlSubcompositor

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for WlSubcompositor

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<D> Dispatch<WlSubcompositor, GlobalData, D> for SubcompositorState

where D: Dispatch<WlSubcompositor, GlobalData>,

fn event( _: &mut D, _: &WlSubcompositor, _: <WlSubcompositor as Proxy>::Event, _: &GlobalData, _: &Connection, _: &QueueHandle<D>, )

Called when an event from the server is processed

fn event_created_child( opcode: u16, _qhandle: &QueueHandle<State>, ) -> Arc<dyn ObjectData>

Method used to initialize the user-data of objects created by events

impl Hash for WlSubcompositor

fn hash<H>(&self, state: &mut H)

where H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<Weak<WlSubcompositor>> for WlSubcompositor

fn eq(&self, other: &Weak<WlSubcompositor>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for WlSubcompositor

fn eq(&self, other: &WlSubcompositor) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Proxy for WlSubcompositor

type Request<'request> = Request<'request>

The request enum for this interface

type Event = Event

The event enum for this interface

fn interface() -> &'static Interface

The interface description

fn id(&self) -> ObjectId

The ID of this object

fn version(&self) -> u32

The version of this object

fn data<U>(&self) -> Option<&U>

where U: Send + Sync + 'static,

Access the user-data associated with this object

fn object_data(&self) -> Option<&Arc<dyn ObjectData>>

Access the raw data associated with this object.

fn backend(&self) -> &WeakBackend

Access the backend associated with this object

fn send_request( &self, req: <WlSubcompositor as Proxy>::Request<'_>, ) -> Result<(), InvalidId>

Send a request for this object.

fn send_constructor<I>( &self, req: <WlSubcompositor as Proxy>::Request<'_>, data: Arc<dyn ObjectData>, ) -> Result<I, InvalidId>

where I: Proxy,

Send a request for this object that creates another object.

fn from_id( conn: &Connection, id: ObjectId, ) -> Result<WlSubcompositor, InvalidId>

Create an object proxy from its ID

fn inert(backend: WeakBackend) -> WlSubcompositor

Create an inert object proxy

fn parse_event( conn: &Connection, msg: Message<ObjectId, OwnedFd>, ) -> Result<(WlSubcompositor, <WlSubcompositor as Proxy>::Event), DispatchError>

Parse a event for this object

fn write_request<'a>( &self, conn: &Connection, msg: <WlSubcompositor as Proxy>::Request<'a>, ) -> Result<(Message<ObjectId, BorrowedFd<'a>>, Option<(&'static Interface, u32)>), InvalidId>

Serialize a request for this object

fn is_alive(&self) -> bool

Checks if the Wayland object associated with this proxy is still alive

fn downgrade(&self) -> Weak<Self>

Creates a weak handle to this object

impl Eq for WlSubcompositor