import { Camera, Entity, Script, Texture2D, Vector2 } from "@galacean/engine";
import { IconMaterial } from "./IconMaterial";
/**
 * Viewport Icon 只能被一个 Viewport Camera 观测
 */
export declare class Icon extends Script {
    private _camera;
    private _scaleMode;
    private _size;
    private _material;
    private _renderer;
    private _pixelViewport;
    private _texture;
    private _isGray;
    get material(): IconMaterial;
    get size(): Vector2;
    setGray(value: boolean): void;
    set size(val: Vector2);
    get texture(): string | Texture2D;
    set texture(value: string | Texture2D);
    constructor(entity: Entity);
    registerIconToViewportCamera(camera: Camera): void;
    onUpdate(deltaTime: number): void;
}
export declare enum IconScaleMode {
    World = 0,
    Screen = 1
}