import { Buffer } from 'node:buffer';
import { createDeflate } from 'node:zlib';
import type { Deflate } from 'node:zlib';
declare const SUPPORTED_COLOR_TYPES: readonly [unknown, unknown, unknown, unknown];
export declare interface PackerOptions {
  deflateChunkSize?: number
  deflateLevel?: number
  deflateStrategy?: number
  inputHasAlpha?: boolean
  deflateFactory?: typeof createDeflate
  bitDepth?: 8 | 16
  colorType?: number
  inputColorType?: number
}
declare type SupportedColorType = typeof SUPPORTED_COLOR_TYPES[number];
/**
 * Packer handles the creation of PNG chunks and data compression
 */
export declare class Packer {
  constructor(options?: PackerOptions);
  getDeflateOptions(): {
    chunkSize: number
    level: number
    strategy: number
  };
  createDeflate(): Deflate;
  filterData(data: Buffer, width: number, height: number): Buffer;
  packGAMA(gamma: number): Buffer;
  packIHDR(width: number, height: number): Buffer;
  packIDAT(data: Buffer): Buffer;
  packIEND(): Buffer;
}