code: function() {
          var center = this._contentBounds.getCenter();
          var width  = 1.0 / this.getHomeZoom();
          var height = width / this.getAspectRatio();
  
          return new $.Rect(
              center.x - (width / 2.0),
              center.y - (height / 2.0),
              width,
              height
          );
      }
docs: Returns the home bounds in viewport coordinates.
  This method ignores the viewport rotation. Use
  {@link OpenSeadragon.Viewport#getHomeBounds} to take it into account.
  @function
  @returns {OpenSeadragon.Rect} The home bounds in vewport coordinates.