import type { RectangleLike } from '../../math';
import type { GlRenderable } from './types';
import type { WebGLRenderer } from './WebGLRenderer';
import { GlSystem } from './system';
export type MaskLike = GlRenderable | RectangleLike;
export interface MaskStackItem {
    source: GlRenderable;
    mask: MaskLike;
}
export declare class GlMaskSystem extends GlSystem {
    install(renderer: WebGLRenderer): void;
    stack: MaskStackItem[];
    protected _maskStackHash: Record<number, number>;
    get length(): number;
    get last(): MaskStackItem;
    push(source: GlRenderable, mask: MaskLike): void;
    pop(source: GlRenderable): void;
}