Struct WebGl2BackendInit 

pub struct WebGl2BackendInit {
    pub canvas: HtmlCanvasElement,
    pub context: WebGl2RenderingContext,
    pub width: u32,
    pub height: u32,
    pub clear_color: Color,
}

Constructor inputs for WebGl2Backend.

WebGl2Backend::init is the only constructor, and it needs a live document: it queries the canvas by selector and acquires a webgl2 context. Every field on the backend is pub(crate), so without this struct there is no way to build one from outside the crate and the state-diffing, draw-call and resize surface is untestable. Naming the inputs lets a caller that already holds a context construct a backend without going through DOM lookup.

Fields

canvas: HtmlCanvasElement

The canvas the backend draws into.

context: WebGl2RenderingContext

The webgl2 context every call goes through.

width: u32

The physical pixel width of the drawing buffer.

height: u32

The physical pixel height of the drawing buffer.

clear_color: Color

The colour begin_frame clears to.

Implementations

impl WebGl2BackendInit

pub fn get_canvas(&self) -> &HtmlCanvasElement

pub fn get_mut_canvas(&mut self) -> &mut HtmlCanvasElement

pub fn set_canvas(&mut self, val: HtmlCanvasElement) -> &mut Self

pub fn get_context(&self) -> &WebGl2RenderingContext

pub fn get_mut_context(&mut self) -> &mut WebGl2RenderingContext

pub fn set_context(&mut self, val: WebGl2RenderingContext) -> &mut Self

pub fn get_width(&self) -> &u32

pub fn get_mut_width(&mut self) -> &mut u32

pub fn set_width(&mut self, val: u32) -> &mut Self

pub fn get_height(&self) -> &u32

pub fn get_mut_height(&mut self) -> &mut u32

pub fn set_height(&mut self, val: u32) -> &mut Self

pub fn get_clear_color(&self) -> &Color

pub fn get_mut_clear_color(&mut self) -> &mut Color

pub fn set_clear_color(&mut self, val: Color) -> &mut Self

impl WebGl2BackendInit

pub fn new( canvas: HtmlCanvasElement, context: WebGl2RenderingContext, width: u32, height: u32, clear_color: Color, ) -> Self

Trait Implementations

impl Clone for WebGl2BackendInit

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.