import type { jsPDF as JsPdf } from 'jspdf';
import type { WorkPdfPageBounds } from './work-pdf-text-layer';
/** One alt-text figure candidate in page-local CSS pixels. */
export interface WorkPdfFigureBox {
    alt: string;
    height: number;
    width: number;
    x: number;
    y: number;
}
/**
 * Collects visible `img` elements with non-empty `alt` or `title` inside page
 * bounds. Decorative images without alt/title are omitted (fail soft). Not a
 * PDF/UA certification claim.
 */
export declare function collectWorkPdfFigureBoxes(root: ParentNode, page: WorkPdfPageBounds): WorkPdfFigureBox[];
/**
 * Registers `/Figure` StructElems for collected alt-text images on the current
 * PDF page. Raster paint already embeds the pixels; this deepens the tagged
 * tree without claiming PDF/UA certification.
 */
export declare function appendWorkPdfFigureStructEntries(pdf: JsPdf, figures: readonly WorkPdfFigureBox[]): void;