_onSourceUpdate()
    {
        this._frame.width = this.source.width;
        this._frame.height = this.source.height;

        this.onUpdate.dispatch();
    }
/**
     * Called when the source is updated.
     *
     * @private
     */
Called when the source is updated.
@private
Called when the source is updated . @private
_onSourceUpdate()
    {
        this._frame.width = this.source.width;
        this._frame.height = this.source.height;
        this.onUpdate.dispatch();
    }
_onSourceUpdate ( ) { this . _frame . width = this . source . width ; this . _frame . height = this . source . height ; this . onUpdate . dispatch ( ) ; }
Called when the source is updated.
Called when the source is updated .