import * as PIXI from 'pixi.js';
import { ContainerEvents, Text } from '../sprites';
import { EventEmitter } from './EventEmitter';
interface FPSCounterOptions {
    /**
     * @default true
     */
    autoStart?: boolean;
    /**
     * What the counter will show.
     *
     * @default 'FPS: ${count}'
     */
    presentation?: string;
    /**
     * @default PIXI.UPDATE_PRIORITY.LOW
     */
    priority?: PIXI.UPDATE_PRIORITY;
    /**
     * @default 2
     */
    updatesBySeconds?: number;
}
export declare type FPSCounterEvents = ContainerEvents & {
    ready: [];
};
export interface FPSCounter {
    emit: EventEmitter.Emit<FPSCounterEvents>;
    on: EventEmitter.On<FPSCounterEvents, this>;
    once: EventEmitter.Once<FPSCounterEvents, this>;
}
export declare class FPSCounter extends Text implements FPSCounterOptions {
    autoStart: boolean;
    /**
     * What the counter will show.
     *
     * @remarks use `${count}` to represent the value.
     * @default 'FPS: ${count}'
     */
    presentation: string;
    /**
     * The priority of the FPSCounter.
     *
     * @default PIXI.UPDATE_PRIORITY.LOW
     */
    priority: PIXI.UPDATE_PRIORITY;
    /**
     * The number of time to update the FPSCounter per second.
     *
     * @remarks Upper values means less precise values.
     * @default 2
     */
    updatesBySeconds: number;
    ticker: PIXI.Ticker;
    private lastTime;
    private timeValues;
    private _ready;
    constructor(options?: FPSCounterOptions);
    get ready(): boolean;
    /**
     * Returns the approximate value of the FPS.
     *
     * @see http://pixijs.download/dev-fix-utils-docs/docs/PIXI.Ticker_.html#FPS
     *
     * @returns - The approximate number.
     */
    get approximate(): number;
    /**
     * Returns true if the FPSCounter is started.
     *
     * @returns - The value.
     */
    get started(): boolean;
    /**
     * Returns the mean value from the last 30 frames.
     *
     * @remarks Only update 2 times per second.
     *
     * @returns - The number in a Promise because it is only available 2 times per second.
     */
    get value(): Promise<number>;
    /**
     * Start the ticker.
     * @remarks If {@link FPSCounter#autoStart} hasn't been set to `false`, you shouldn't have to use this method.
     */
    start(): void;
    /**
     * Update the text.
     * @remarks If {@link FPSCounter#autoStart} hasn't been set to `false` and/or you have used the {@link FPSCounter#start} method, you shouldn't have to use this method.
     */
    update(): void;
    private setFPS;
}
export {};