/**
 * Snapshot serialization (spec: "Snapshot API") — shared by OmMapElement
 * and MapController: the composite canvas RuntimeCore.snapshot() produces,
 * serialized to the consumer's preferred shape.
 */
export interface SnapshotOptions {
    /** Image MIME type — default "image/png". */
    type?: "image/png" | "image/jpeg" | "image/webp";
    /** Lossy-format quality 0–1 (jpeg/webp). */
    quality?: number;
    /** Output shape — default "dataURL" (what print/export pipelines embed directly); "blob" for uploads/files. */
    as?: "dataURL" | "blob";
}
export declare function serializeSnapshot(canvas: HTMLCanvasElement, opts: SnapshotOptions): Promise<string | Blob>;