/**
 * 将base64 data URL导入为blob
 * @param dataURL
 * @returns
 */
export declare function dataURLtoBlob(dataURL: string): Blob;
export declare function getFileContent(rawUrl: string): Promise<Blob>;
export declare function imgShader(img: ImageBitmap, color?: string): ImageData;
export declare function adjustSize(sw: number, sh: number, dw: number, dh: number): [number, number, number, number];
export declare function formatTime(time: number): string;
export declare const tween: Array<(pos: number) => number>;