/*
* Copyright 2015-2017 WorldWind Contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @exports BingTiledImageLayer
*/
define([
'../geom/Angle',
'../geom/Location',
'../geom/Sector',
'../layer/MercatorTiledImageLayer'
],
function (Angle,
Location,
Sector,
MercatorTiledImageLayer) {
"use strict";
/**
* Constructs a base Bing layer. This constructor is meant to be called only by subclasses.
* @alias BingTiledImageLayer
* @constructor
* @augments MercatorTiledImageLayer
* @classdesc Provides an abstract base layer for Bing imagery. This class is not intended to be constructed
* independently but as a base layer for subclasses.
* See {@link BingAerialLayer}, {@link BingAerialWithLabelsLayer} and {@link BingRoadsLayer}.
*
* @param {String} displayName This layer's display name.
*/
var BingTiledImageLayer = function (displayName) {
this.imageSize = 256;
MercatorTiledImageLayer.call(this,
new Sector(-85.05, 85.05, -180, 180), new Location(85.05, 180), 23, "image/jpeg", displayName,
this.imageSize, this.imageSize);
this.displayName = displayName;
this.pickEnabled = false;
this.detectBlankImages = true;
this.creditImage = WorldWind.configuration.baseUrl + "images/powered-by-bing.png"
};
BingTiledImageLayer.prototype = Object.create(MercatorTiledImageLayer.prototype);
BingTiledImageLayer.prototype.doRender = function (dc) {
MercatorTiledImageLayer.prototype.doRender.call(this, dc);
if (this.inCurrentFrame) {
dc.screenCreditController.addImageCredit(this.creditImage);
}
};
// Overridden from TiledImageLayer.
BingTiledImageLayer.prototype.createTopLevelTiles = function (dc) {
this.topLevelTiles = [];
this.topLevelTiles.push(this.createTile(null, this.levels.firstLevel(), 0, 0));
this.topLevelTiles.push(this.createTile(null, this.levels.firstLevel(), 0, 1));
this.topLevelTiles.push(this.createTile(null, this.levels.firstLevel(), 1, 0));
this.topLevelTiles.push(this.createTile(null, this.levels.firstLevel(), 1, 1));
};
// Determines the Bing map size for a specified level number.
BingTiledImageLayer.prototype.mapSizeForLevel = function (levelNumber) {
return 256 << (levelNumber + 1);
};
return BingTiledImageLayer;
}
)
;