import type { DemManager, DemTile, GlobalContourTileOptions, Timing } from "./types";
import type WorkerDispatch from "./worker-dispatch";
import Actor from "./actor";
type RequestParameters = {
    url: string;
    headers?: any;
    method?: "GET" | "POST" | "PUT";
    body?: string;
    type?: "string" | "json" | "arrayBuffer" | "image";
    credentials?: "same-origin" | "include";
    collectResourceTiming?: boolean;
};
type ExpiryData = {
    cacheControl?: string | null;
    expires?: Date | string | null;
};
type GetResourceResponse<T> = ExpiryData & {
    data: T;
};
type AddProtocolAction = (requestParameters: RequestParameters, abortController: AbortController) => Promise<GetResourceResponse<ArrayBuffer>>;
type ResponseCallbackV3 = (error?: Error | undefined, data?: any | undefined, cacheControl?: string | undefined, expires?: string | undefined) => void;
type V3OrV4Protocol = <T extends AbortController | ResponseCallbackV3, R = T extends AbortController ? Promise<GetResourceResponse<ArrayBuffer>> : {
    cancel: () => void;
}>(requestParameters: RequestParameters, arg2: T) => R;
/**
 * A remote source of DEM tiles that can be connected to maplibre.
 */
export declare class DemSource {
    sharedDemProtocolId: string;
    contourProtocolId: string;
    contourProtocolUrlBase: string;
    manager: DemManager;
    sharedDemProtocolUrl: string;
    timingCallbacks: Array<(timing: Timing) => void>;
    constructor({ url, cacheSize, id, encoding, maxzoom, worker, timeoutMs, actor, }: {
        /** Remote DEM tile url using `{z}` `{x}` and `{y}` placeholders */
        url: string;
        /** Number of most-recently-used tiles to cache */
        cacheSize?: number;
        /** Prefix for the maplibre protocol */
        id?: string;
        encoding?: "terrarium" | "mapbox";
        /** Maximum zoom of tiles contained in the source */
        maxzoom: number;
        timeoutMs?: number;
        /** Handle requests in a shared web worker to reduce UI-thread jank */
        worker?: boolean;
        actor?: Actor<WorkerDispatch>;
    });
    /** Registers a callback to be invoked with a performance report after each tile is requested. */
    onTiming: (callback: (timing: Timing) => void) => void;
    getDemTile(z: number, x: number, y: number, abortController?: AbortController): Promise<DemTile>;
    /**
     * Adds contour and shared DEM protocol handlers to maplibre.
     *
     * @param maplibre maplibre global object
     */
    setupMaplibre: (maplibre: {
        addProtocol: (id: string, protcol: V3OrV4Protocol) => void;
    }) => void;
    parseUrl(url: string): [number, number, number];
    /**
     * Callback to be used with maplibre addProtocol to re-use cached DEM tiles across sources.
     */
    sharedDemProtocolV4: AddProtocolAction;
    /**
     * Callback to be used with maplibre addProtocol to generate contour vector tiles according
     * to options encoded in the tile URL pattern generated by `contourProtocolUrl`.
     */
    contourProtocolV4: AddProtocolAction;
    contourProtocol: V3OrV4Protocol;
    sharedDemProtocol: V3OrV4Protocol;
    /**
     * Returns a URL with the correct maplibre protocol prefix and all `option` encoded in request parameters.
     */
    contourProtocolUrl: (options: GlobalContourTileOptions) => string;
}
export {};