initialize(el, width, height, origin, scaleFactor) {
      this._el = el;
      return this.resize(width, height, origin, scaleFactor);
    }
Initialize a new Renderer instance.
@param {DOMElement} el - The containing DOM element for the display.
@param {number} width - The coordinate width of the display, in pixels.
@param {number} height - The coordinate height of the display, in pixels.
@param {Array<number>} origin - The origin of the display, in pixels.
  The coordinate system will be translated to this point.
@param {number} [scaleFactor=1] - Optional scaleFactor by which to multiply
  the width and height to determine the final pixel size.
@return {Renderer} - This renderer instance.