import { IDecodedImage } from "../core/ImageCodec";
/**
 * Node.js-specific image codec implementation.
 * Uses native Node.js modules (pngjs, zlib) for optimal performance.
 */
export default class ImageCodecNode {
    private static _crc32Table;
    /**
     * Decode PNG image data to RGBA pixels using pngjs.
     * This is synchronous and only works in Node.js.
     *
     * @param data Raw PNG file bytes
     * @returns Decoded image, or undefined if decoding fails
     */
    static decodePng(data: Uint8Array): IDecodedImage | undefined;
    /**
     * Decode PNG image data asynchronously.
     * Wraps the synchronous decoder in a Promise for API consistency.
     *
     * @param data Raw PNG file bytes
     * @returns Promise resolving to decoded image, or undefined if decoding fails
     */
    static decodePngAsync(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Encode RGBA pixel data to PNG format using pngjs.
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width
     * @param height Image height
     * @returns PNG file bytes, or undefined if encoding fails
     */
    static encodeToPng(pixels: Uint8Array, width: number, height: number): Uint8Array | undefined;
    /**
     * Encode RGBA pixel data to PNG format using manual chunk creation.
     * Used as fallback if pngjs encoding fails.
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width
     * @param height Image height
     * @returns PNG file bytes, or undefined if encoding fails
     */
    static encodeToPngManual(pixels: Uint8Array, width: number, height: number): Uint8Array | undefined;
    /**
     * Encode RGBA pixel data to PNG format asynchronously.
     * Wraps the synchronous encoder in a Promise for API consistency.
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width
     * @param height Image height
     * @returns Promise resolving to PNG file bytes
     */
    static encodeToPngAsync(pixels: Uint8Array, width: number, height: number): Promise<Uint8Array | undefined>;
    /**
     * Create a PNG chunk with type, data, and CRC.
     */
    private static createPngChunk;
    /**
     * Calculate CRC32 checksum for PNG chunk validation.
     */
    private static crc32;
    /**
     * Get the CRC32 lookup table (lazy initialized).
     */
    private static getCrc32Table;
    /**
     * Convert raw image bytes to a data URL using Node.js Buffer.
     *
     * @param data Image file bytes (PNG, JPEG, etc.)
     * @param mimeType MIME type (e.g., "image/png")
     * @returns Data URL string
     */
    static toDataUrl(data: Uint8Array, mimeType: string): string;
}