export declare const PNG_SIGNATURE: Uint8Array<ArrayBuffer>;
/**
 * Encode 8-bit RGB (3 channels) or RGBA (4 channels) pixels as a non-interlaced PNG,
 * deflated at zlib `level` (0 stores, for an intermediate decoded right away).
 */
export declare function encodeRawPng(pixels: Uint8Array, width: number, height: number, channels: 3 | 4, level?: number): Buffer;