import type { ImageSignature } from "./image/image-signature-types.js";
import type { ResolvedPreviewDocument } from "./types.js";
export type RelativeSignatureOverlay = Pick<ImageSignature, "rx" | "ry" | "rw" | "rh" | "imageDataUrl">;
export type CompositeDownloadOptions = {
    onProgress?: (page: number, total: number) => void;
};
/** Bake visible annotations into the download when the preview has overlay marks. */
export declare function compositeDownloadBlob(baseBlob: Blob, resolved: ResolvedPreviewDocument, previewRoot: HTMLElement, options?: CompositeDownloadOptions): Promise<{
    blob: Blob;
    fileName: string;
} | null>;
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