canvas-context

canvas-context

Create a RenderingContext (2d, webgl, webgl2, bitmaprenderer), optionally offscreen for possible use in a Worker.

See the demo and its source for an example with Worker implementation.

Installation

npm install canvas-context

Usage

const createCanvasContext = require("canvas-context");

const { context, canvas } = createCanvasContext("2d", {
	width: 100,
	height: 100,
	offscreen: true
});

API

createCanvasContext(contextType, options): { context: RenderingContext, canvas: HTMLCanvasElement }

type ContextType =
	| "2d"
	| "webgl"
	| "experimental-webgl"
	| "webgl2"
	| "bitmaprenderer";

Option	Type	Default	Description
contextType	ContextType	"2d"	Context identifier defining the drawing context associated to the canvas
options.canvas	HTMLCanvasElement?		An optional canvas. Necessary when window === "undefined" (eg. Node or Worker context)
options.width	number?	300	Set canvas.width (should be an integer >= 0)
options.height	number?	150	Set canvas.height (should be an integer >= 0)
options.offscreen	boolean?	false	Create an OffscreenCanvas or transferControlToOffscreen() if options.canvas
options.worker	boolean?	false	Try to get an OffscreenCanvas and return only the canvas so it can be transferred in a Worker

License

MIT. See license file.