import type { FilterSetting } from './filters.js';
import type { ParseOptions } from './types.js';
export declare const hasOffscreenCanvas: boolean;
export declare function camelize(string: string): string;
export declare function assert<TCond = unknown>(condition: TCond, message?: string): asserts condition;
export declare function assertIsImage(image: HTMLImageElement): asserts image is HTMLImageElement;
export declare function createWorker<TData = unknown, TMessage = unknown>(fn: (messageEvent: MessageEvent<TData>) => TMessage | Promise<TMessage>): Worker;
/**
 * Parse setting to style string
 * @param setting - The filter setting
 */
export declare function parseSettingToStyle(setting?: FilterSetting): string;
interface CreateBlobOptions<TCanvas extends HTMLCanvasElement | OffscreenCanvas = HTMLCanvasElement> {
    canvas: TCanvas;
    image: ImageBitmap;
    filterStyle: string;
    options: ParseOptions;
}
export declare function createBlobWorker({ data, }: MessageEvent<CreateBlobOptions<OffscreenCanvas>>): Promise<Blob | null>;
export {};