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import Frozen from "../Core/Frozen.js";
import defined from "../Core/defined.js";
import Event from "../Core/Event.js";
import GeographicTilingScheme from "../Core/GeographicTilingScheme.js";
/**
* @typedef {object} TileCoordinatesImageryProvider.ConstructorOptions
*
* Initialization options for the TileCoordinatesImageryProvider constructor
*
* @property {TilingScheme} [tilingScheme=new GeographicTilingScheme()] The tiling scheme for which to draw tiles.
* @property {Ellipsoid} [ellipsoid] The ellipsoid. If the tilingScheme is specified,
* this parameter is ignored and the tiling scheme's ellipsoid is used instead. If neither
* parameter is specified, the WGS84 ellipsoid is used.
* @property {Color} [color=Color.YELLOW] The color to draw the tile box and label.
* @property {number} [tileWidth=256] The width of the tile for level-of-detail selection purposes.
* @property {number} [tileHeight=256] The height of the tile for level-of-detail selection purposes.
*/
/**
* An {@link ImageryProvider} that draws a box around every rendered tile in the tiling scheme, and draws
* a label inside it indicating the X, Y, Level coordinates of the tile. This is mostly useful for
* debugging terrain and imagery rendering problems.
*
* @alias TileCoordinatesImageryProvider
* @constructor
*
* @param {TileCoordinatesImageryProvider.ConstructorOptions} [options] Object describing initialization options
*/
function TileCoordinatesImageryProvider(options) {
options = options ?? Frozen.EMPTY_OBJECT;
this._tilingScheme = defined(options.tilingScheme)
? options.tilingScheme
: new GeographicTilingScheme({ ellipsoid: options.ellipsoid });
this._color = options.color ?? Color.YELLOW;
this._errorEvent = new Event();
this._tileWidth = options.tileWidth ?? 256;
this._tileHeight = options.tileHeight ?? 256;
this._defaultAlpha = undefined;
this._defaultNightAlpha = undefined;
this._defaultDayAlpha = undefined;
this._defaultBrightness = undefined;
this._defaultContrast = undefined;
this._defaultHue = undefined;
this._defaultSaturation = undefined;
this._defaultGamma = undefined;
this._defaultMinificationFilter = undefined;
this._defaultMagnificationFilter = undefined;
}
Object.defineProperties(TileCoordinatesImageryProvider.prototype, {
/**
* Gets the proxy used by this provider.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {Proxy}
* @readonly
*/
proxy: {
get: function () {
return undefined;
},
},
/**
* Gets the width of each tile, in pixels.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {number}
* @readonly
*/
tileWidth: {
get: function () {
return this._tileWidth;
},
},
/**
* Gets the height of each tile, in pixels.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {number}
* @readonly
*/
tileHeight: {
get: function () {
return this._tileHeight;
},
},
/**
* Gets the maximum level-of-detail that can be requested.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {number|undefined}
* @readonly
*/
maximumLevel: {
get: function () {
return undefined;
},
},
/**
* Gets the minimum level-of-detail that can be requested.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {number}
* @readonly
*/
minimumLevel: {
get: function () {
return undefined;
},
},
/**
* Gets the tiling scheme used by this provider.
* @memberof TileCoordinatesImageryProvider.prototype
* @type {TilingScheme}
* @readonly
*/
tilingScheme: {
get: function () {
return this._tilingScheme;
},
},
/**
* Gets the rectangle, in radians, of the imagery provided by this instance.
* @memberof TileCoordinatesImageryProvider.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 TileCoordinatesImageryProvider.prototype
* @type {TileDiscardPolicy}
* @readonly
*/
tileDiscardPolicy: {
get: function () {
return undefined;
},
},
/**
* 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 TileCoordinatesImageryProvider.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 TileCoordinatesImageryProvider.prototype
* @type {Credit}
* @readonly
*/
credit: {
get: function () {
return undefined;
},
},
/**
* 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 TileCoordinatesImageryProvider.prototype
* @type {boolean}
* @readonly
*/
hasAlphaChannel: {
get: function () {
return true;
},
},
});
/**
* 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.
*/
TileCoordinatesImageryProvider.prototype.getTileCredits = function (
x,
y,
level,
) {
return undefined;
};
/**
* 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<HTMLCanvasElement>} The resolved image as a Canvas DOM object.
*/
TileCoordinatesImageryProvider.prototype.requestImage = function (
x,
y,
level,
request,
) {
const canvas = document.createElement("canvas");
canvas.width = 256;
canvas.height = 256;
const context = canvas.getContext("2d");
const cssColor = this._color.toCssColorString();
context.strokeStyle = cssColor;
context.lineWidth = 2;
context.strokeRect(1, 1, 255, 255);
context.font = "bold 25px Arial";
context.textAlign = "center";
context.fillStyle = cssColor;
context.fillText(`L: ${level}`, 124, 86);
context.fillText(`X: ${x}`, 124, 136);
context.fillText(`Y: ${y}`, 124, 186);
return Promise.resolve(canvas);
};
/**
* 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.
*/
TileCoordinatesImageryProvider.prototype.pickFeatures = function (
x,
y,
level,
longitude,
latitude,
) {
return undefined;
};
export default TileCoordinatesImageryProvider;
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