interface HighlightInfo {
    element: HTMLElement;
    index: number;
    parentIframe: HTMLElement | null;
}
/**
 * Renders highlights for the given elements onto an OffscreenCanvas
 * and returns an ImageBitmap.
 *
 * @param highlightInfos Array of objects describing elements to highlight.
 * @param width The desired width of the canvas (e.g., window.innerWidth).
 * @param height The desired height of the canvas (e.g., window.innerHeight).
 * @returns A Promise resolving to an ImageBitmap containing the highlights.
 */
export declare function renderHighlightsOffscreen(highlightInfos: HighlightInfo[], width: number, height: number): ImageBitmap;
export {};