/**
 * Parameter type of `loadEncoder()` and `loadDecoder()`.
 *
 * - If is a string, it's the URL of WASM file to fetch.
 * - If is BufferSource, it will be treated as the WASM bytes.
 */
export type WasmSource = string | BufferSource;
export declare function loadES(factory: any, source?: WasmSource): any;
export interface ImageDataLike {
    width: number;
    height: number;
    depth: number;
    data: Uint8Array | Uint8ClampedArray;
}
export declare function toBitDepth(image: ImageDataLike, value: number): ImageDataLike;
/**
 * Node does not have `ImageData` class, so we define a pure version.
 */
export declare class PureImageData implements ImageDataLike {
    readonly data: Uint8ClampedArray;
    readonly width: number;
    readonly height: number;
    readonly depth: number;
    constructor(data: Uint8ClampedArray, width: number, height: number, depth?: number);
}
export declare function encodeES<T>(name: string, wasm: any, defaults: T, image: ImageDataLike, options?: T): Uint8Array;
export declare function check<T>(value: string | null | T, hint: string): T;