import { XRSessionMode } from "./XRSessionMode";
import { XRSessionState } from "./XRSessionState";
/**
 * XRSessionManager manages the life cycle of XR sessions.
 */
export declare class XRSessionManager {
    private _xrManager;
    private _engine;
    private _mode;
    private _state;
    private _rhi;
    private _raf;
    private _caf;
    private _listeners;
    /**
     * The current session mode( AR or VR ).
     */
    get mode(): XRSessionMode;
    /**
     * Return the current session state.
     */
    get state(): XRSessionState;
    /**
     * Return a list of supported frame rates.(only available in-session)
     */
    get supportedFrameRate(): Float32Array;
    /**
     * Return the current frame rate as reported by the device.
     */
    get frameRate(): number;
    /**
     * Check if the specified mode is supported.
     * @param mode - The mode to check
     * @returns A promise that resolves if the mode is supported, otherwise rejects
     */
    isSupportedMode(mode: XRSessionMode): Promise<void>;
    /**
     * Run the session.
     */
    run(): void;
    /**
     * Stop the session.
     */
    stop(): void;
    /**
     * Add a listening function for session state changes.
     * @param listener - The listening function
     */
    addStateChangedListener(listener: (state: XRSessionState) => void): void;
    /**
     * Remove a listening function of session state changes.
     * @param listener - The listening function
     */
    removeStateChangedListener(listener: (state: XRSessionState) => void): void;
    private _onSessionExit;
}