// PNG Header signature bytes
export declare const PNG_SIGNATURE: Uint8Array;
// Chunk type constants
export declare const ChunkType: {
  IHDR: unknown;
  IEND: unknown;
  IDAT: unknown;
  PLTE: unknown;
  tRNS: unknown;
  gAMA: unknown
};
// Individual color type bits
export declare const ColorType: {
  GRAYSCALE: 0;
  PALETTE: 1;
  COLOR: 2;
  ALPHA: 4
};
// Combined color types
export declare const ColorTypeCombinations: {
  PALETTE_COLOR: 3;
  COLOR_ALPHA: 6
};
// Maps color types to bits per pixel
export declare const COLORTYPE_TO_BPP_MAP: Readonly<Record<number, number>>;
// Gamma division constant
export declare const GAMMA_DIVISION: 100000;
// Export commonly used combinations for convenience
export declare const TYPE_IHDR: number;
export declare const TYPE_IEND: number;
export declare const TYPE_IDAT: number;
export declare const TYPE_PLTE: number;
export declare const TYPE_tRNS: number;
export declare const TYPE_gAMA: number;
export declare const COLORTYPE_GRAYSCALE: number;
export declare const COLORTYPE_PALETTE: number;
export declare const COLORTYPE_COLOR: number;
export declare const COLORTYPE_ALPHA: number;
export declare const COLORTYPE_PALETTE_COLOR: number;
export declare const COLORTYPE_COLOR_ALPHA: number;