/**
 * Decoded image pixel data.
 * All decoders return this common format.
 */
export interface IDecodedImage {
    /** Image width in pixels */
    width: number;
    /** Image height in pixels */
    height: number;
    /** RGBA pixel data (4 bytes per pixel: R, G, B, A) */
    pixels: Uint8Array;
}
/**
 * Supported image formats for decoding
 */
export type ImageFormat = "png" | "tga" | "jpg" | "jpeg";
/**
 * Unified image encoding/decoding utilities.
 *
 * This is the main entry point for all image operations.
 * It automatically selects the best implementation for the current environment.
 */
export default class ImageCodec {
    private static _crc32Table;
    /**
     * Decode TGA image data to RGBA pixels.
     * Works in all environments (Node.js, browser, web worker).
     *
     * Uses @lunapaint/tga-codec which handles:
     * - Uncompressed true-color (type 2)
     * - Uncompressed grayscale (type 3)
     * - RLE compressed (types 9, 10, 11)
     * - Various bit depths (8, 16, 24, 32)
     *
     * @param data Raw TGA file bytes
     * @returns Decoded image with RGBA pixels, or undefined if decoding fails
     */
    static decodeTga(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Decode PNG image data to RGBA pixels.
     * Automatically uses the best decoder for the current environment.
     *
     * - Node.js: Uses pngjs (synchronous, fast)
     * - Browser: Uses createImageBitmap + Canvas (async)
     * - Web Worker: Uses createImageBitmap + OffscreenCanvas (async)
     *
     * @param data Raw PNG file bytes
     * @returns Decoded image with RGBA pixels, or undefined if decoding fails
     */
    static decodePng(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Decode PNG using browser APIs (createImageBitmap + Canvas).
     * Works in browser main thread and web workers.
     *
     * @param data Raw PNG file bytes
     * @returns Decoded image, or undefined if not in browser or decoding fails
     */
    static decodePngBrowser(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Decode JPEG image data to RGBA pixels.
     * Only works in browser environments (uses createImageBitmap).
     *
     * @param data Raw JPEG file bytes
     * @returns Decoded image with RGBA pixels, or undefined if decoding fails
     */
    static decodeJpeg(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Decode image data to RGBA pixels based on specified format.
     *
     * @param data Raw image file bytes
     * @param format File format ("png", "tga", "jpg", "jpeg")
     * @returns Decoded image, or undefined if decoding fails
     */
    static decode(data: Uint8Array, format: ImageFormat | string): Promise<IDecodedImage | undefined>;
    /**
     * Decode image data, auto-detecting format from file header.
     *
     * @param data Raw image file bytes
     * @returns Decoded image, or undefined if format unknown or decoding fails
     */
    static decodeAuto(data: Uint8Array): Promise<IDecodedImage | undefined>;
    /**
     * Encode RGBA pixel data to PNG format.
     * Automatically uses the best encoder for the current environment.
     *
     * - Node.js: Uses pngjs (synchronous, optimized)
     * - Browser: Uses canvas.toBlob (async)
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width in pixels
     * @param height Image height in pixels
     * @returns PNG file bytes, or undefined if encoding fails
     */
    static encodeToPng(pixels: Uint8Array, width: number, height: number): Promise<Uint8Array | undefined>;
    /**
     * Synchronous PNG encoding (Node.js only).
     * Use this when you need synchronous behavior and know you're in Node.js.
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width in pixels
     * @param height Image height in pixels
     * @returns PNG file bytes, or undefined if not in Node.js or encoding fails
     */
    static encodeToPngSync(pixels: Uint8Array, width: number, height: number): Uint8Array | undefined;
    /**
     * Encode RGBA pixels to PNG using browser Canvas API.
     *
     * @param pixels RGBA pixel data (4 bytes per pixel)
     * @param width Image width in pixels
     * @param height Image height in pixels
     * @returns PNG file bytes, or undefined if not in browser or encoding fails
     */
    static encodeToPngBrowser(pixels: Uint8Array, width: number, height: number): Promise<Uint8Array | undefined>;
    /**
     * Check if data is a PNG file (magic number: 0x89 0x50 0x4E 0x47).
     */
    static isPngData(data: Uint8Array): boolean;
    /**
     * Check if data is a JPEG file (magic number: 0xFF 0xD8 0xFF).
     */
    static isJpegData(data: Uint8Array): boolean;
    /**
     * Check if data is a TGA file.
     *
     * TGA has no magic number, so we check:
     * 1. It's NOT PNG or JPEG (which have magic numbers)
     * 2. Byte 2 (image type) is a valid TGA type
     *
     * Valid TGA types:
     * - 1: Uncompressed color-mapped
     * - 2: Uncompressed true-color
     * - 3: Uncompressed grayscale
     * - 9: RLE color-mapped
     * - 10: RLE true-color
     * - 11: RLE grayscale
     */
    static isTgaData(data: Uint8Array): boolean;
    /**
     * Detect image format from file header bytes.
     *
     * @param data Raw file bytes
     * @returns Detected format, or undefined if unknown
     */
    static detectFormat(data: Uint8Array): ImageFormat | undefined;
    /**
     * Convert raw image bytes to a data URL.
     *
     * @param data Image file bytes (PNG, JPEG, etc.)
     * @param mimeType MIME type (e.g., "image/png")
     * @returns Data URL string (data:image/png;base64,...)
     */
    static toDataUrl(data: Uint8Array, mimeType: string): string;
    /**
     * Convert decoded image to PNG data URL.
     *
     * @param image Decoded image with RGBA pixels
     * @returns PNG data URL, or undefined if encoding fails
     */
    static toPngDataUrl(image: IDecodedImage): Promise<string | undefined>;
    /**
     * Convert TGA data directly to PNG data.
     *
     * @param tgaData Raw TGA file bytes
     * @returns PNG file bytes, or undefined if conversion fails
     */
    static tgaToPng(tgaData: Uint8Array): Promise<Uint8Array | undefined>;
    /**
     * Convert TGA data to PNG data URL.
     *
     * @param tgaData Raw TGA file bytes
     * @returns PNG data URL (data:image/png;base64,...), or undefined if fails
     */
    static tgaToPngDataUrl(tgaData: Uint8Array): Promise<string | undefined>;
    /**
     * Convert BGRA pixel data to RGBA.
     * TGA files often store pixels in BGRA format.
     *
     * @param pixels BGRA pixel data (modified in place)
     * @returns The same array with R and B swapped
     */
    static bgraToRgba(pixels: Uint8Array): Uint8Array;
    /**
     * Create a solid color image.
     *
     * @param width Image width
     * @param height Image height
     * @param r Red component (0-255)
     * @param g Green component (0-255)
     * @param b Blue component (0-255)
     * @param a Alpha component (0-255, default 255)
     * @returns Decoded image with solid color
     */
    static createSolidColor(width: number, height: number, r: number, g: number, b: number, a?: number): IDecodedImage;
}