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import Check from "../Core/Check.js";
import Credit from "../Core/Credit.js";
import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import Event from "../Core/Event.js";
import CesiumMath from "../Core/Math.js";
import Rectangle from "../Core/Rectangle.js";
import Resource from "../Core/Resource.js";
import RuntimeError from "../Core/RuntimeError.js";
import TileProviderError from "../Core/TileProviderError.js";
import WebMercatorTilingScheme from "../Core/WebMercatorTilingScheme.js";
import BingMapsStyle from "./BingMapsStyle.js";
import DiscardEmptyTilePolicy from "./DiscardEmptyTileImagePolicy.js";
import ImageryProvider from "./ImageryProvider.js";
/**
* @typedef {object} BingMapsImageryProvider.ConstructorOptions
*
* Initialization options for the BingMapsImageryProvider constructor
*
* @property {string} [key] The Bing Maps key for your application, which can be
* created at {@link https://www.bingmapsportal.com/}.
* @property {string} [tileProtocol] The protocol to use when loading tiles, e.g. 'http' or 'https'.
* By default, tiles are loaded using the same protocol as the page.
* @property {BingMapsStyle} [mapStyle=BingMapsStyle.AERIAL] The type of Bing Maps imagery to load.
* @property {string} [mapLayer] Additional display layer options as defined on {@link https://learn.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata#template-parameters}
* @property {string} [culture=''] The culture to use when requesting Bing Maps imagery. Not
* all cultures are supported. See {@link http://msdn.microsoft.com/en-us/library/hh441729.aspx}
* for information on the supported cultures.
* @property {Ellipsoid} [ellipsoid=Ellipsoid.default] The ellipsoid. If not specified, the default ellipsoid is used.
* @property {TileDiscardPolicy} [tileDiscardPolicy] The policy that determines if a tile
* is invalid and should be discarded. By default, a {@link DiscardEmptyTileImagePolicy}
* will be used, with the expectation that the Bing Maps server will send a zero-length response for missing tiles.
* To ensure that no tiles are discarded, construct and pass a {@link NeverTileDiscardPolicy} for this parameter.
*/
/**
* Used to track creation details while fetching initial metadata
*
* @constructor
* @private
*
* @param {BingMapsImageryProvider.ConstructorOptions} options An object describing initialization options
*/
function ImageryProviderBuilder(options) {
this.tileWidth = undefined;
this.tileHeight = undefined;
this.maximumLevel = undefined;
this.imageUrlSubdomains = undefined;
this.imageUrlTemplate = undefined;
this.attributionList = undefined;
}
/**
* Complete BingMapsImageryProvider creation based on builder values.
*
* @private
*
* @param {BingMapsImageryProvider} provider
*/
ImageryProviderBuilder.prototype.build = function (provider) {
provider._tileWidth = this.tileWidth;
provider._tileHeight = this.tileHeight;
provider._maximumLevel = this.maximumLevel;
provider._imageUrlSubdomains = this.imageUrlSubdomains;
provider._imageUrlTemplate = this.imageUrlTemplate;
let attributionList = (provider._attributionList = this.attributionList);
if (!attributionList) {
attributionList = [];
}
provider._attributionList = attributionList;
for (
let attributionIndex = 0, attributionLength = attributionList.length;
attributionIndex < attributionLength;
++attributionIndex
) {
const attribution = attributionList[attributionIndex];
if (attribution.credit instanceof Credit) {
// If attribution.credit has already been created
// then we are using a cached value, which means
// none of the remaining processing needs to be done.
break;
}
attribution.credit = new Credit(attribution.attribution);
const coverageAreas = attribution.coverageAreas;
for (
let areaIndex = 0, areaLength = attribution.coverageAreas.length;
areaIndex < areaLength;
++areaIndex
) {
const area = coverageAreas[areaIndex];
const bbox = area.bbox;
area.bbox = new Rectangle(
CesiumMath.toRadians(bbox[1]),
CesiumMath.toRadians(bbox[0]),
CesiumMath.toRadians(bbox[3]),
CesiumMath.toRadians(bbox[2]),
);
}
}
};
function metadataSuccess(data, imageryProviderBuilder) {
if (data.resourceSets.length !== 1) {
throw new RuntimeError(
"metadata does not specify one resource in resourceSets",
);
}
const resource = data.resourceSets[0].resources[0];
imageryProviderBuilder.tileWidth = resource.imageWidth;
imageryProviderBuilder.tileHeight = resource.imageHeight;
imageryProviderBuilder.maximumLevel = resource.zoomMax - 1;
imageryProviderBuilder.imageUrlSubdomains = resource.imageUrlSubdomains;
imageryProviderBuilder.imageUrlTemplate = resource.imageUrl;
let validProviders = resource.imageryProviders;
if (defined(resource.imageryProviders)) {
// prevent issues with the imagery API from crashing the viewer when the expected properties are not there
// See https://github.com/CesiumGS/cesium/issues/12088
validProviders = resource.imageryProviders.filter((provider) =>
provider.coverageAreas?.some((area) => defined(area.bbox)),
);
}
imageryProviderBuilder.attributionList = validProviders;
}
function metadataFailure(metadataResource, error, provider) {
let message = `An error occurred while accessing ${metadataResource.url}`;
if (defined(error) && defined(error.message)) {
message += `: ${error.message}`;
}
TileProviderError.reportError(
undefined,
provider,
defined(provider) ? provider._errorEvent : undefined,
message,
undefined,
undefined,
undefined,
error,
);
throw new RuntimeError(message);
}
async function requestMetadata(
metadataResource,
imageryProviderBuilder,
provider,
) {
const cacheKey = metadataResource.url;
let promise = BingMapsImageryProvider._metadataCache[cacheKey];
if (!defined(promise)) {
promise = metadataResource.fetchJson();
BingMapsImageryProvider._metadataCache[cacheKey] = promise;
}
try {
const data = await promise;
return metadataSuccess(data, imageryProviderBuilder);
} catch (e) {
metadataFailure(metadataResource, e, provider);
}
}
/**
* <div class="notice">
* To construct a BingMapsImageryProvider, call {@link BingMapsImageryProvider.fromUrl}. Do not call the constructor directly.
* </div>
*
* Provides tiled imagery using the Bing Maps Imagery REST API.
*
* @alias BingMapsImageryProvider
* @constructor
*
* @param {BingMapsImageryProvider.ConstructorOptions} options Object describing initialization options
*
* @see BingMapsImageryProvider.fromUrl
* @see ArcGisMapServerImageryProvider
* @see GoogleEarthEnterpriseMapsProvider
* @see OpenStreetMapImageryProvider
* @see SingleTileImageryProvider
* @see TileMapServiceImageryProvider
* @see WebMapServiceImageryProvider
* @see WebMapTileServiceImageryProvider
* @see UrlTemplateImageryProvider
*
* @example
* const bing = await Cesium.BingMapsImageryProvider.fromUrl(
* "https://dev.virtualearth.net", {
* key: "get-yours-at-https://www.bingmapsportal.com/",
* mapStyle: Cesium.BingMapsStyle.AERIAL
* });
*
* @see {@link http://msdn.microsoft.com/en-us/library/ff701713.aspx|Bing Maps REST Services}
* @see {@link http://www.w3.org/TR/cors/|Cross-Origin Resource Sharing}
*/
function BingMapsImageryProvider(options) {
options = options ?? Frozen.EMPTY_OBJECT;
this._defaultAlpha = undefined;
this._defaultNightAlpha = undefined;
this._defaultDayAlpha = undefined;
this._defaultBrightness = undefined;
this._defaultContrast = undefined;
this._defaultHue = undefined;
this._defaultSaturation = undefined;
this._defaultGamma = 1.0;
this._defaultMinificationFilter = undefined;
this._defaultMagnificationFilter = undefined;
this._mapStyle = options.mapStyle ?? BingMapsStyle.AERIAL;
this._mapLayer = options.mapLayer;
this._culture = options.culture ?? "";
this._key = options.key;
this._tileDiscardPolicy = options.tileDiscardPolicy;
if (!defined(this._tileDiscardPolicy)) {
this._tileDiscardPolicy = new DiscardEmptyTilePolicy();
}
this._proxy = options.proxy;
this._credit = new Credit(
`<a href="https://www.microsoft.com/en-us/maps/bing-maps/product"><img src="${BingMapsImageryProvider.logoUrl}" title="Bing Imagery"/></a>`,
);
this._tilingScheme = new WebMercatorTilingScheme({
numberOfLevelZeroTilesX: 2,
numberOfLevelZeroTilesY: 2,
ellipsoid: options.ellipsoid,
});
this._tileWidth = undefined;
this._tileHeight = undefined;
this._maximumLevel = undefined;
this._imageUrlTemplate = undefined;
this._imageUrlSubdomains = undefined;
this._attributionList = undefined;
this._errorEvent = new Event();
}
Object.defineProperties(BingMapsImageryProvider.prototype, {
/**
* Gets the name of the BingMaps server url hosting the imagery.
* @memberof BingMapsImageryProvider.prototype
* @type {string}
* @readonly
*/
url: {
get: function () {
return this._resource.url;
},
},
/**
* Gets the proxy used by this provider.
* @memberof BingMapsImageryProvider.prototype
* @type {Proxy}
* @readonly
*/
proxy: {
get: function () {
return this._resource.proxy;
},
},
/**
* Gets the Bing Maps key.
* @memberof BingMapsImageryProvider.prototype
* @type {string}
* @readonly
*/
key: {
get: function () {
return this._key;
},
},
/**
* Gets the type of Bing Maps imagery to load.
* @memberof BingMapsImageryProvider.prototype
* @type {BingMapsStyle}
* @readonly
*/
mapStyle: {
get: function () {
return this._mapStyle;
},
},
/**
* Gets the additional map layer options as defined in {@link https://learn.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata#template-parameters}/
* @memberof BingMapsImageryProvider.prototype
* @type {string}
* @readonly
*/
mapLayer: {
get: function () {
return this._mapLayer;
},
},
/**
* The culture to use when requesting Bing Maps imagery. Not
* all cultures are supported. See {@link http://msdn.microsoft.com/en-us/library/hh441729.aspx}
* for information on the supported cultures.
* @memberof BingMapsImageryProvider.prototype
* @type {string}
* @readonly
*/
culture: {
get: function () {
return this._culture;
},
},
/**
* Gets the width of each tile, in pixels.
* @memberof BingMapsImageryProvider.prototype
* @type {number}
* @readonly
*/
tileWidth: {
get: function () {
return this._tileWidth;
},
},
/**
* Gets the height of each tile, in pixels.
* @memberof BingMapsImageryProvider.prototype
* @type {number}
* @readonly
*/
tileHeight: {
get: function () {
return this._tileHeight;
},
},
/**
* Gets the maximum level-of-detail that can be requested.
* @memberof BingMapsImageryProvider.prototype
* @type {number|undefined}
* @readonly
*/
maximumLevel: {
get: function () {
return this._maximumLevel;
},
},
/**
* Gets the minimum level-of-detail that can be requested.
* @memberof BingMapsImageryProvider.prototype
* @type {number}
* @readonly
*/
minimumLevel: {
get: function () {
return 0;
},
},
/**
* Gets the tiling scheme used by this provider.
* @memberof BingMapsImageryProvider.prototype
* @type {TilingScheme}
* @readonly
*/
tilingScheme: {
get: function () {
return this._tilingScheme;
},
},
/**
* Gets the rectangle, in radians, of the imagery provided by this instance.
* @memberof BingMapsImageryProvider.prototype
* @type {Rectangle}
* @readonly
*/
rectangle: {
get: function () {
return this._tilingScheme.rectangle;
},
},
/**
* Gets the tile discard policy. If not undefined, the discard policy is responsible
* for filtering out "missing" tiles via its shouldDiscardImage function. If this function
* returns undefined, no tiles are filtered.
* @memberof BingMapsImageryProvider.prototype
* @type {TileDiscardPolicy}
* @readonly
*/
tileDiscardPolicy: {
get: function () {
return this._tileDiscardPolicy;
},
},
/**
* Gets an event that is raised when the imagery provider encounters an asynchronous error. By subscribing
* to the event, you will be notified of the error and can potentially recover from it. Event listeners
* are passed an instance of {@link TileProviderError}.
* @memberof BingMapsImageryProvider.prototype
* @type {Event}
* @readonly
*/
errorEvent: {
get: function () {
return this._errorEvent;
},
},
/**
* Gets the credit to display when this imagery provider is active. Typically this is used to credit
* the source of the imagery.
* @memberof BingMapsImageryProvider.prototype
* @type {Credit}
* @readonly
*/
credit: {
get: function () {
return this._credit;
},
},
/**
* Gets a value indicating whether or not the images provided by this imagery provider
* include an alpha channel. If this property is false, an alpha channel, if present, will
* be ignored. If this property is true, any images without an alpha channel will be treated
* as if their alpha is 1.0 everywhere. Setting this property to false reduces memory usage
* and texture upload time.
* @memberof BingMapsImageryProvider.prototype
* @type {boolean}
* @readonly
*/
hasAlphaChannel: {
get: function () {
return defined(this.mapLayer);
},
},
});
/**
* Creates an {@link ImageryProvider} which provides tiled imagery using the Bing Maps Imagery REST API.
*
* @param {Resource|string} url The url of the Bing Maps server hosting the imagery.
* @param {BingMapsImageryProvider.ConstructorOptions} options Object describing initialization options
* @returns {Promise<BingMapsImageryProvider>} A promise that resolves to the created BingMapsImageryProvider
*
* @example
* const bing = await Cesium.BingMapsImageryProvider.fromUrl(
* "https://dev.virtualearth.net", {
* key: "get-yours-at-https://www.bingmapsportal.com/",
* mapStyle: Cesium.BingMapsStyle.AERIAL
* });
*
* @exception {RuntimeError} metadata does not specify one resource in resourceSets
*/
BingMapsImageryProvider.fromUrl = async function (url, options) {
options = options ?? Frozen.EMPTY_OBJECT;
//>>includeStart('debug', pragmas.debug);
Check.defined("url", url);
Check.defined("options.key", options.key);
//>>includeEnd('debug');
let tileProtocol = options.tileProtocol;
// For backward compatibility reasons, the tileProtocol may end with
// a `:`. Remove it.
Iif (defined(tileProtocol)) {
if (
tileProtocol.length > 0 &&
tileProtocol[tileProtocol.length - 1] === ":"
) {
tileProtocol = tileProtocol.substr(0, tileProtocol.length - 1);
}
} else {
// use http if the document's protocol is http, otherwise use https
const documentProtocol = document.location.protocol;
tileProtocol = documentProtocol === "http:" ? "http" : "https";
}
const mapStyle = options.mapStyle ?? BingMapsStyle.AERIAL;
const resource = Resource.createIfNeeded(url);
resource.appendForwardSlash();
const queryParameters = {
incl: "ImageryProviders",
key: options.key,
uriScheme: tileProtocol,
};
if (defined(options.mapLayer)) {
queryParameters.mapLayer = options.mapLayer;
}
if (defined(options.culture)) {
queryParameters.culture = options.culture;
}
const metadataResource = resource.getDerivedResource({
url: `REST/v1/Imagery/Metadata/${mapStyle}`,
queryParameters: queryParameters,
});
const provider = new BingMapsImageryProvider(options);
provider._resource = resource;
const imageryProviderBuilder = new ImageryProviderBuilder(options);
await requestMetadata(metadataResource, imageryProviderBuilder);
imageryProviderBuilder.build(provider);
return provider;
};
const rectangleScratch = new Rectangle();
/**
* Gets the credits to be displayed when a given tile is displayed.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level;
* @returns {Credit[]} The credits to be displayed when the tile is displayed.
*/
BingMapsImageryProvider.prototype.getTileCredits = function (x, y, level) {
const rectangle = this._tilingScheme.tileXYToRectangle(
x,
y,
level,
rectangleScratch,
);
const result = getRectangleAttribution(
this._attributionList,
level,
rectangle,
);
return result;
};
/**
* Requests the image for a given tile.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level.
* @param {Request} [request] The request object. Intended for internal use only.
* @returns {Promise<ImageryTypes>|undefined} A promise for the image that will resolve when the image is available, or
* undefined if there are too many active requests to the server, and the request should be retried later.
*/
BingMapsImageryProvider.prototype.requestImage = function (
x,
y,
level,
request,
) {
const promise = ImageryProvider.loadImage(
this,
buildImageResource(this, x, y, level, request),
);
Eif (defined(promise)) {
return promise.catch(function (error) {
// One cause of an error here is that the image we tried to load was zero-length.
// This isn't actually a problem, since it indicates that there is no tile.
// So, in that case we return the EMPTY_IMAGE sentinel value for later discarding.
if (defined(error.blob) && error.blob.size === 0) {
return DiscardEmptyTilePolicy.EMPTY_IMAGE;
}
return Promise.reject(error);
});
}
return undefined;
};
/**
* Picking features is not currently supported by this imagery provider, so this function simply returns
* undefined.
*
* @param {number} x The tile X coordinate.
* @param {number} y The tile Y coordinate.
* @param {number} level The tile level.
* @param {number} longitude The longitude at which to pick features.
* @param {number} latitude The latitude at which to pick features.
* @return {undefined} Undefined since picking is not supported.
*/
BingMapsImageryProvider.prototype.pickFeatures = function (
x,
y,
level,
longitude,
latitude,
) {
return undefined;
};
/**
* Converts a tiles (x, y, level) position into a quadkey used to request an image
* from a Bing Maps server.
*
* @param {number} x The tile's x coordinate.
* @param {number} y The tile's y coordinate.
* @param {number} level The tile's zoom level.
*
* @see {@link http://msdn.microsoft.com/en-us/library/bb259689.aspx|Bing Maps Tile System}
* @see BingMapsImageryProvider#quadKeyToTileXY
*/
BingMapsImageryProvider.tileXYToQuadKey = function (x, y, level) {
let quadkey = "";
for (let i = level; i >= 0; --i) {
const bitmask = 1 << i;
let digit = 0;
if ((x & bitmask) !== 0) {
digit |= 1;
}
if ((y & bitmask) !== 0) {
digit |= 2;
}
quadkey += digit;
}
return quadkey;
};
/**
* Converts a tile's quadkey used to request an image from a Bing Maps server into the
* (x, y, level) position.
*
* @param {string} quadkey The tile's quad key
*
* @see {@link http://msdn.microsoft.com/en-us/library/bb259689.aspx|Bing Maps Tile System}
* @see BingMapsImageryProvider#tileXYToQuadKey
*/
BingMapsImageryProvider.quadKeyToTileXY = function (quadkey) {
let x = 0;
let y = 0;
const level = quadkey.length - 1;
for (let i = level; i >= 0; --i) {
const bitmask = 1 << i;
const digit = +quadkey[level - i];
if ((digit & 1) !== 0) {
x |= bitmask;
}
if ((digit & 2) !== 0) {
y |= bitmask;
}
}
return {
x: x,
y: y,
level: level,
};
};
BingMapsImageryProvider._logoUrl = undefined;
Object.defineProperties(BingMapsImageryProvider, {
/**
* Gets or sets the URL to the Bing logo for display in the credit.
* @memberof BingMapsImageryProvider
* @type {string}
*/
logoUrl: {
get: function () {
if (!defined(BingMapsImageryProvider._logoUrl)) {
BingMapsImageryProvider._logoUrl = buildModuleUrl(
"Assets/Images/bing_maps_credit.png",
);
}
return BingMapsImageryProvider._logoUrl;
},
set: function (value) {
//>>includeStart('debug', pragmas.debug);
Check.defined("value", value);
//>>includeEnd('debug');
BingMapsImageryProvider._logoUrl = value;
},
},
});
function buildImageResource(imageryProvider, x, y, level, request) {
const imageUrl = imageryProvider._imageUrlTemplate;
const subdomains = imageryProvider._imageUrlSubdomains;
const subdomainIndex = (x + y + level) % subdomains.length;
return imageryProvider._resource.getDerivedResource({
url: imageUrl,
request: request,
templateValues: {
quadkey: BingMapsImageryProvider.tileXYToQuadKey(x, y, level),
subdomain: subdomains[subdomainIndex],
culture: imageryProvider._culture,
},
queryParameters: {
// this parameter tells the Bing servers to send a zero-length response
// instead of a placeholder image for missing tiles.
n: "z",
},
});
}
const intersectionScratch = new Rectangle();
function getRectangleAttribution(attributionList, level, rectangle) {
// Bing levels start at 1, while ours start at 0.
++level;
const result = [];
for (
let attributionIndex = 0, attributionLength = attributionList.length;
attributionIndex < attributionLength;
++attributionIndex
) {
const attribution = attributionList[attributionIndex];
const coverageAreas = attribution.coverageAreas;
let included = false;
for (
let areaIndex = 0, areaLength = attribution.coverageAreas.length;
!included && areaIndex < areaLength;
++areaIndex
) {
const area = coverageAreas[areaIndex];
if (level >= area.zoomMin && level <= area.zoomMax) {
const intersection = Rectangle.intersection(
rectangle,
area.bbox,
intersectionScratch,
);
Eif (defined(intersection)) {
included = true;
}
}
}
if (included) {
result.push(attribution.credit);
}
}
return result;
}
// Exposed for testing
BingMapsImageryProvider._metadataCache = {};
export default BingMapsImageryProvider;
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