/**
 * PNGOptimizer.ts
 * Created by 还有醋v on 2022/6/14.
 * Copyright © 2022 haiyoucuv. All rights reserved.
 */
export declare enum DeflateMethod {
    "Zlib" = 0,
    "SevenZip" = 1,
    "Zopfli" = 2
}
export default class PngOptimizer {
    private readyPromise;
    private module;
    constructor();
    static DeflateMethod: typeof DeflateMethod;
    static createOptimizer(): Promise<PngOptimizer>;
    checkReady(): any;
    optAPNG(apngBuffer: any, options: any): Uint8Array;
}