import { Rectangle, Quad } from '@pixi/core';
/**
 * @extends PIXI.Quad
 * @memberof PIXI.lights
 */
export declare class ViewportQuad extends Quad {
    /**
     * Update
     * @param {PIXI.Rectangle} viewport -
     */
    update(viewport: Rectangle): void;
    static _instance: ViewportQuad;
}