Trait Renderer 

pub trait Renderer {
    // Required methods
    fn start_layer(&mut self, bounds: Rectangle);
    fn end_layer(&mut self);
    fn start_transformation(&mut self, transformation: Transformation);
    fn end_transformation(&mut self);
    fn fill_quad(&mut self, quad: Quad, background: impl Into<Background>);
    fn reset(&mut self, new_bounds: Rectangle);
    fn allocate_image(
        &mut self,
        handle: &Handle,
        callback: impl FnOnce(Result<Allocation, Error>) + Send + 'static,
    );

    // Provided methods
    fn with_layer(&mut self, bounds: Rectangle, f: impl FnOnce(&mut Self)) { ... }
    fn with_transformation(
        &mut self,
        transformation: Transformation,
        f: impl FnOnce(&mut Self),
    ) { ... }
    fn with_translation(
        &mut self,
        translation: Vector,
        f: impl FnOnce(&mut Self),
    ) { ... }
}

A component that can be used by widgets to draw themselves on a screen.

Required Methods

fn start_layer(&mut self, bounds: Rectangle)

Starts recording a new layer.

fn end_layer(&mut self)

Ends recording a new layer.

The new layer will clip its contents to the provided bounds.

fn start_transformation(&mut self, transformation: Transformation)

Starts recording with a new Transformation.

fn end_transformation(&mut self)

Ends recording a new layer.

The new layer will clip its contents to the provided bounds.

fn fill_quad(&mut self, quad: Quad, background: impl Into<Background>)

Fills a Quad with the provided Background.

fn reset(&mut self, new_bounds: Rectangle)

Resets the Renderer to start drawing in the new_bounds from scratch.

fn allocate_image( &mut self, handle: &Handle, callback: impl FnOnce(Result<Allocation, Error>) + Send + 'static, )

Creates an image::Allocation for the given image::Handle and calls the given callback with it.

Provided Methods

fn with_layer(&mut self, bounds: Rectangle, f: impl FnOnce(&mut Self))

Draws the primitives recorded in the given closure in a new layer.

The layer will clip its contents to the provided bounds.

fn with_transformation( &mut self, transformation: Transformation, f: impl FnOnce(&mut Self), )

Applies a Transformation to the primitives recorded in the given closure.

fn with_translation(&mut self, translation: Vector, f: impl FnOnce(&mut Self))

Applies a translation to the primitives recorded in the given closure.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl Renderer for ()

fn start_layer(&mut self, _bounds: Rectangle)

fn end_layer(&mut self)

fn start_transformation(&mut self, _transformation: Transformation)

fn end_transformation(&mut self)

fn reset(&mut self, _new_bounds: Rectangle)

fn fill_quad(&mut self, _quad: Quad, _background: impl Into<Background>)

fn allocate_image( &mut self, handle: &Handle, callback: impl FnOnce(Result<Allocation, Error>) + Send + 'static, )

Implementors