/// <reference types="node" />
import stream = require("stream");
import png = require("./index");
export = Packer;
declare class Packer extends stream.Readable {
    private _option;
    constructor(option: png.IImageOptions);
    pack(data: Buffer, width: number, height: number): void;
    _read(): void;
    private _packChunk;
    private _packIHDR;
    private _packIDAT;
    private _packIEND;
}