/**
 * WS-17C — instant layer toggling via per-OCG isolated tiles.
 *
 * The engine renders one PNG per layer with a transparent
 * background (``pngalpha`` device + every other OCG hidden via
 * ``_apply_ocg_overrides``). The browser then composites the active
 * subset locally via ``source-over`` blending. Toggling a layer
 * is just removing it from the draw list and redrawing — no API
 * round-trip after the first warm-up.
 *
 * The first paint of an unseen layer takes ~1-3 s (Ghostscript +
 * cache write). Subsequent toggles of the same layer hit the S3
 * cache and complete in well under 100 ms.
 *
 * Mirrors the public-shape of SeparationCanvas so PdfViewer can
 * swap them in / out by ``viewerMode``.
 */
interface LayerCanvasProps {
    jobId: string;
    pageNum: number;
    enabledLayers: Set<number>;
    /** All OCG indices for this page (drawing order). */
    allLayers: number[];
    width: number;
    height: number;
    dpi?: number;
    /**
     * Optional cap on the composite canvas's **backing-store** pixel area
     * (CSS display size is unchanged). Without it, a large-format page in
     * layer view allocates a full page×zoom canvas — tens of megapixels on a
     * dieline — which exhausts iOS Safari's per-process canvas budget and makes
     * the page (and surrounding UI) blank out. Mirrors SeparationCanvas.
     */
    maxCanvasPixels?: number;
}
export declare function LayerCanvas({ jobId: _jobId, pageNum, enabledLayers, allLayers, width, height, dpi, maxCanvasPixels, }: LayerCanvasProps): import("react").JSX.Element;
export {};
//# sourceMappingURL=LayerCanvas.d.ts.map