import { Renderer, Script, Vector2 } from "@galacean/engine";
/**
 * GPU Frame buffer picker.
 * @decorator `@dependentComponents(Camera, DependentMode.CheckOnly)`
 */
export declare class FramebufferPicker extends Script {
    private static _rootEntityRenderers;
    private static _pickPixel;
    private static _pickIds;
    private static _pickColorProperty;
    private _renderersMap;
    private _camera;
    private _pickRenderTarget;
    private _frameBufferSize;
    get frameBufferSize(): Vector2;
    set frameBufferSize(value: Vector2);
    onAwake(): void;
    /**
     * Pick up renderer at screen coordinate.
     * @param x - The x coordinate of screen
     * @param y - The y coordinate of screen
     * @returns Promise<Renderer>
     */
    pick(x: number, y: number): Promise<Renderer>;
    /**
     * Pick up renderers in a rectangular region of the screen.
     * @param startX - The start x coordinate of screen
     * @param startY - The start y coordinate of screen
     * @param endX - The end x coordinate of screen
     * @param endY - The end y coordinate of screen
     * @returns Promise<Array<Renderer>>
     */
    regionPick(startX: number, startY: number, endX: number, endY: number): Promise<Array<Renderer>>;
    private _checkFrameBufferSize;
    private _updateRenderersPickColor;
    private _setupRenderTarget;
    private _readPixelFromRenderTarget;
    private _getCoordOnRenderTarget;
    private _getRendererByPixel;
    private _getRenderersByPixel;
    private _uniqueId2Color;
    private _color2UniqueId;
    private _color2UniqueIds;
}