/**
 * In-browser PDF fallback adapter built on pdf.js.
 *
 * Provides "minimum data" for the fallback-capable tools (PageCanvas,
 * PageNavigator, MeasureTool, LayerPanel, ColorPickerTool) when a host
 * hasn't wired richer services. Hosts pass the returned adapter as
 * ``pdfFallback`` on the host context.
 *
 * pdf.js is loaded lazily via dynamic ``import("pdfjs-dist")`` so it
 * stays out of the bundle for hosts that don't use this fallback. Add
 * ``pdfjs-dist`` to your app's dependencies (it's an optional peer dep
 * of ``@printwithsynergy/lens-pdf``).
 *
 * **Security**: this adapter fetches whatever URL the host hands it.
 * Sign / scope / expire the URL the same way you would any other PDF
 * download — the viewer is a pure renderer and trusts the host to
 * enforce access control upstream.
 *
 * @public
 */
import type { PdfFallbackAdapter } from "../plugin/services";
interface PdfJsFallbackOptions {
    /** Raw PDF URL. Must be reachable from the user's browser. */
    pdfUrl: string;
    /**
     * Optional override for the pdf.js worker URL. When omitted, the
     * adapter assumes the bundler / host has already configured
     * ``GlobalWorkerOptions.workerSrc``.
     */
    workerSrc?: string;
}
/**
 * Build a {@link PdfFallbackAdapter} backed by pdf.js. The returned
 * adapter caches the parsed document and per-page rasters so repeated
 * calls don't re-parse or re-render.
 *
 * @deprecated Use ``createPdfJsFallback`` from
 *   ``@printwithsynergy/lens-pdf/fallback-pdfjs`` instead. The
 *   subpath imports pdfjs-dist statically so bundlers trace it
 *   correctly without consumers having to side-effect-import the
 *   dep. This `/host` export uses a dynamic ``await import("...")``
 *   that bundlers don't trace; works at runtime only when
 *   pdfjs-dist is also installed and resolvable from the consuming
 *   app's module graph. New code should not use this entry point.
 *
 * @public
 */
export declare function createPdfJsFallback(opts: PdfJsFallbackOptions): PdfFallbackAdapter;
export {};
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