Struct Subcompositor

pub struct Subcompositor;

An implementation of the wl_subcompositor global.

wl_subcompositor provides an interface for clients to defer some composition to the server. For example, a media player application may provide the compositor with one surface that contains the video frames and another surface that contains playback controls. Deferring this composition to the server allows for the server to make certain optimizations, such as mapping these surfaces to hardware layers on the display controller, if available.

Implementation Note: We currently implement the wl_subcompositor by creating new scenic ShapeNodes and placing them as children of the parent node. This makes for a simple implementation, but we don’t support any alpha blending of subsurfaces (due to limitations in how Scenic handles these use cases). Scenic may be extended to handle these 2D composition use-cases, but without that we’ll need to do some of our own blending here.

Implementations

impl Subcompositor

pub fn new() -> Self

Creates a new Subcompositor.

Trait Implementations

impl RequestReceiver<WlSubcompositor> for Subcompositor

fn receive( this: ObjectRef<Self>, request: WlSubcompositorRequest, client: &mut Client, ) -> Result<(), Error>

Handle a decoded message for the associated |Interface|.