export declare const getWindowGlobalObject: () => typeof globalThis;
export declare function lengthBytesUTF8(str: string): number;
export declare function setStringData(str: string, heap: Uint8Array, outPtr: number): void;
export declare function hasUnicodeChars(str: string): boolean;
export declare function getPdfString(heap: Uint8Array, ptr: number, length: number, pdfToUtf16: number[]): string;
export declare function fontFeatureToStr(ff: number): string;