Struct BrowserSurface 

pub struct BrowserSurface { /* private fields */ }

The state every surface of a view has: its canvas, its compositor and its size in device pixels and logical units.

Implementations

impl BrowserSurface

pub fn new(js_surface: CanvasSurface, compositor: Rc<Compositor>) -> Self

Creates the surface state for a canvas of the page.

pub fn compositor(&self) -> Rc<Compositor>

The compositor that renders to the surface.

pub fn scaling(&self) -> f64

The scaling from logical units to device pixels.

pub fn client_size(&self) -> Size

The size in logical units.

pub fn render_size(&self) -> PixelSize

The size in device pixels.

pub fn is_valid(&self) -> bool

Whether the surface has a size it can be rendered at.

pub fn size_changed(&self, handler: Rc<dyn Fn()>) -> u64

Subscribes to changes of the client size.

pub fn scaling_changed(&self, handler: Rc<dyn Fn()>) -> u64

Subscribes to changes of the scaling.

pub fn initial_size(&self) -> Option<(f64, f64, f64)>

The size and the scaling the canvas has right now, as (pixel width, pixel height, scaling); None once disposed.

pub fn dispose(&self)

Releases the canvas surface.

pub fn on_size_changed(&self, pixel_width: f64, pixel_height: f64, dpr: f64)

Records the size of the canvas and raises the change events.

pixel_width and pixel_height are in device pixels; dpr is the device pixel ratio.