Trait Compositor 

pub trait Compositor: Sized {
    type Renderer;
    type Surface;

    // Required methods
    fn with_backend<W: Window + Clone>(
        _settings: Settings,
        _compatible_window: W,
        _shell: Shell,
        _backend: Option<&str>,
    ) -> impl Future<Output = Result<Self, Error>>;
    fn create_renderer(&self) -> Self::Renderer;
    fn create_surface<W: Window + Clone>(
        &mut self,
        window: W,
        width: u32,
        height: u32,
    ) -> Self::Surface;
    fn configure_surface(
        &mut self,
        surface: &mut Self::Surface,
        width: u32,
        height: u32,
    );
    fn information(&self) -> Information;
    fn present(
        &mut self,
        renderer: &mut Self::Renderer,
        surface: &mut Self::Surface,
        viewport: &Viewport,
        background_color: Color,
        on_pre_present: impl FnOnce(),
    ) -> Result<(), SurfaceError>;
    fn screenshot(
        &mut self,
        renderer: &mut Self::Renderer,
        viewport: &Viewport,
        background_color: Color,
    ) -> Vec<u8> ;

    // Provided methods
    fn new<W: Window + Clone>(
        settings: Settings,
        compatible_window: W,
        shell: Shell,
    ) -> impl Future<Output = Result<Self, Error>> { ... }
    fn load_font(&mut self, font: Cow<'static, [u8]>) { ... }
}

A graphics compositor that can draw to windows.

Required Associated Types

type Renderer

The iced renderer of the backend.

type Surface

The surface of the backend.

Required Methods

fn with_backend<W: Window + Clone>( _settings: Settings, _compatible_window: W, _shell: Shell, _backend: Option<&str>, ) -> impl Future<Output = Result<Self, Error>>

Creates a new Compositor with a backend preference.

If the backend does not match the preference, it will return Error::GraphicsAdapterNotFound.

fn create_renderer(&self) -> Self::Renderer

Creates a Self::Renderer for the Compositor.

fn create_surface<W: Window + Clone>( &mut self, window: W, width: u32, height: u32, ) -> Self::Surface

Crates a new Surface for the given window.

fn configure_surface( &mut self, surface: &mut Self::Surface, width: u32, height: u32, )

Configures a new Surface with the given dimensions.

fn information(&self) -> Information

Returns Information used by this Compositor.

fn present( &mut self, renderer: &mut Self::Renderer, surface: &mut Self::Surface, viewport: &Viewport, background_color: Color, on_pre_present: impl FnOnce(), ) -> Result<(), SurfaceError>

Presents the Renderer primitives to the next frame of the given Surface.

fn screenshot( &mut self, renderer: &mut Self::Renderer, viewport: &Viewport, background_color: Color, ) -> Vec<u8>

Screenshots the current Renderer primitives to an offscreen texture, and returns the bytes of the texture ordered as RGBA in the sRGB color space.

Provided Methods

fn new<W: Window + Clone>( settings: Settings, compatible_window: W, shell: Shell, ) -> impl Future<Output = Result<Self, Error>>

Creates a new Compositor.

fn load_font(&mut self, font: Cow<'static, [u8]>)

Loads a font from its bytes.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Compositor for ()

Available on debug-assertions enabled only.

type Renderer = ()

type Surface = ()

async fn with_backend<W: Window + Clone>( _settings: Settings, _compatible_window: W, _shell: Shell, _preferred_backend: Option<&str>, ) -> Result<Self, Error>

fn create_renderer(&self) -> Self::Renderer

fn create_surface<W: Window + Clone>( &mut self, _window: W, _width: u32, _height: u32, ) -> Self::Surface

fn configure_surface( &mut self, _surface: &mut Self::Surface, _width: u32, _height: u32, )

fn load_font(&mut self, _font: Cow<'static, [u8]>)

fn information(&self) -> Information

fn present( &mut self, _renderer: &mut Self::Renderer, _surface: &mut Self::Surface, _viewport: &Viewport, _background_color: Color, _on_pre_present: impl FnOnce(), ) -> Result<(), SurfaceError>

fn screenshot( &mut self, _renderer: &mut Self::Renderer, _viewport: &Viewport, _background_color: Color, ) -> Vec<u8>

Implementors