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259
node_modules/ol/source/ImageMapGuide.js
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259
node_modules/ol/source/ImageMapGuide.js
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/**
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* @module ol/source/ImageMapGuide
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*/
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var __extends = (this && this.__extends) || (function () {
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var extendStatics = function (d, b) {
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extendStatics = Object.setPrototypeOf ||
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({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
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function (d, b) { for (var p in b) if (Object.prototype.hasOwnProperty.call(b, p)) d[p] = b[p]; };
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return extendStatics(d, b);
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};
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return function (d, b) {
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if (typeof b !== "function" && b !== null)
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throw new TypeError("Class extends value " + String(b) + " is not a constructor or null");
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extendStatics(d, b);
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function __() { this.constructor = d; }
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d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
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};
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})();
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import EventType from '../events/EventType.js';
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import ImageSource, { defaultImageLoadFunction } from './Image.js';
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import ImageWrapper from '../Image.js';
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import { appendParams } from '../uri.js';
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import { assign } from '../obj.js';
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import { containsExtent, getCenter, getHeight, getWidth, scaleFromCenter, } from '../extent.js';
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/**
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* @typedef {Object} Options
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* @property {string} [url] The mapagent url.
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* @property {null|string} [crossOrigin] The `crossOrigin` attribute for loaded images. Note that
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* you must provide a `crossOrigin` value if you want to access pixel data with the Canvas renderer.
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* See https://developer.mozilla.org/en-US/docs/Web/HTML/CORS_enabled_image for more detail.
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* @property {number} [displayDpi=96] The display resolution.
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* @property {number} [metersPerUnit=1] The meters-per-unit value.
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* @property {boolean} [hidpi=true] Use the `ol/Map#pixelRatio` value when requesting
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* the image from the remote server.
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* @property {boolean} [useOverlay] If `true`, will use `GETDYNAMICMAPOVERLAYIMAGE`.
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* @property {import("../proj.js").ProjectionLike} [projection] Projection. Default is the view projection.
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* @property {number} [ratio=1] Ratio. `1` means image requests are the size of the map viewport, `2` means
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* twice the width and height of the map viewport, and so on. Must be `1` or higher.
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* @property {Array<number>} [resolutions] Resolutions.
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* If specified, requests will be made for these resolutions only.
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* @property {import("../Image.js").LoadFunction} [imageLoadFunction] Optional function to load an image given a URL.
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* @property {boolean} [imageSmoothing=true] Deprecated. Use the `interpolate` option instead.
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* @property {boolean} [interpolate=true] Use interpolated values when resampling. By default,
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* linear interpolation is used when resampling. Set to false to use the nearest neighbor instead.
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* @property {Object} [params] Additional parameters.
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*/
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/**
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* @classdesc
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* Source for images from Mapguide servers
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*
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* @fires module:ol/source/Image.ImageSourceEvent
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* @api
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*/
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var ImageMapGuide = /** @class */ (function (_super) {
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__extends(ImageMapGuide, _super);
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/**
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* @param {Options} options ImageMapGuide options.
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*/
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function ImageMapGuide(options) {
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var _this = this;
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var interpolate = options.imageSmoothing !== undefined ? options.imageSmoothing : true;
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if (options.interpolate !== undefined) {
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interpolate = options.interpolate;
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}
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_this = _super.call(this, {
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interpolate: interpolate,
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projection: options.projection,
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resolutions: options.resolutions,
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}) || this;
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/**
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* @private
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* @type {?string}
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*/
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_this.crossOrigin_ =
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options.crossOrigin !== undefined ? options.crossOrigin : null;
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/**
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* @private
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* @type {number}
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*/
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_this.displayDpi_ =
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options.displayDpi !== undefined ? options.displayDpi : 96;
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/**
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* @private
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* @type {!Object}
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*/
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_this.params_ = options.params || {};
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/**
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* @private
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* @type {string|undefined}
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*/
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_this.url_ = options.url;
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/**
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* @private
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* @type {import("../Image.js").LoadFunction}
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*/
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_this.imageLoadFunction_ =
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options.imageLoadFunction !== undefined
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? options.imageLoadFunction
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: defaultImageLoadFunction;
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/**
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* @private
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* @type {boolean}
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*/
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_this.hidpi_ = options.hidpi !== undefined ? options.hidpi : true;
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/**
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* @private
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* @type {number}
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*/
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_this.metersPerUnit_ =
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options.metersPerUnit !== undefined ? options.metersPerUnit : 1;
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/**
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* @private
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* @type {number}
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*/
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_this.ratio_ = options.ratio !== undefined ? options.ratio : 1;
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/**
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* @private
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* @type {boolean}
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*/
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_this.useOverlay_ =
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options.useOverlay !== undefined ? options.useOverlay : false;
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/**
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* @private
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* @type {import("../Image.js").default}
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*/
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_this.image_ = null;
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/**
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* @private
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* @type {number}
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*/
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_this.renderedRevision_ = 0;
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return _this;
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}
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/**
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* Get the user-provided params, i.e. those passed to the constructor through
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* the "params" option, and possibly updated using the updateParams method.
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* @return {Object} Params.
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* @api
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*/
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ImageMapGuide.prototype.getParams = function () {
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return this.params_;
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};
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/**
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* @param {import("../extent.js").Extent} extent Extent.
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* @param {number} resolution Resolution.
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* @param {number} pixelRatio Pixel ratio.
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* @param {import("../proj/Projection.js").default} projection Projection.
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* @return {import("../Image.js").default} Single image.
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*/
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ImageMapGuide.prototype.getImageInternal = function (extent, resolution, pixelRatio, projection) {
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resolution = this.findNearestResolution(resolution);
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pixelRatio = this.hidpi_ ? pixelRatio : 1;
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var image = this.image_;
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if (image &&
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this.renderedRevision_ == this.getRevision() &&
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image.getResolution() == resolution &&
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image.getPixelRatio() == pixelRatio &&
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containsExtent(image.getExtent(), extent)) {
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return image;
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}
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if (this.ratio_ != 1) {
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extent = extent.slice();
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scaleFromCenter(extent, this.ratio_);
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}
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var width = getWidth(extent) / resolution;
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var height = getHeight(extent) / resolution;
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var size = [width * pixelRatio, height * pixelRatio];
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if (this.url_ !== undefined) {
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var imageUrl = this.getUrl(this.url_, this.params_, extent, size, projection);
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image = new ImageWrapper(extent, resolution, pixelRatio, imageUrl, this.crossOrigin_, this.imageLoadFunction_);
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image.addEventListener(EventType.CHANGE, this.handleImageChange.bind(this));
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}
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else {
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image = null;
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}
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this.image_ = image;
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this.renderedRevision_ = this.getRevision();
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return image;
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};
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/**
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* Return the image load function of the source.
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* @return {import("../Image.js").LoadFunction} The image load function.
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* @api
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*/
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ImageMapGuide.prototype.getImageLoadFunction = function () {
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return this.imageLoadFunction_;
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};
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/**
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* Update the user-provided params.
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* @param {Object} params Params.
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* @api
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*/
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ImageMapGuide.prototype.updateParams = function (params) {
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assign(this.params_, params);
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this.changed();
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};
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/**
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* @param {string} baseUrl The mapagent url.
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* @param {Object<string, string|number>} params Request parameters.
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* @param {import("../extent.js").Extent} extent Extent.
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* @param {import("../size.js").Size} size Size.
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* @param {import("../proj/Projection.js").default} projection Projection.
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* @return {string} The mapagent map image request URL.
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*/
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ImageMapGuide.prototype.getUrl = function (baseUrl, params, extent, size, projection) {
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var scale = getScale(extent, size, this.metersPerUnit_, this.displayDpi_);
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var center = getCenter(extent);
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var baseParams = {
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'OPERATION': this.useOverlay_
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? 'GETDYNAMICMAPOVERLAYIMAGE'
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: 'GETMAPIMAGE',
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'VERSION': '2.0.0',
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'LOCALE': 'en',
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'CLIENTAGENT': 'ol/source/ImageMapGuide source',
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'CLIP': '1',
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'SETDISPLAYDPI': this.displayDpi_,
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'SETDISPLAYWIDTH': Math.round(size[0]),
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'SETDISPLAYHEIGHT': Math.round(size[1]),
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'SETVIEWSCALE': scale,
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'SETVIEWCENTERX': center[0],
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'SETVIEWCENTERY': center[1],
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};
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assign(baseParams, params);
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return appendParams(baseUrl, baseParams);
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};
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/**
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* Set the image load function of the MapGuide source.
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* @param {import("../Image.js").LoadFunction} imageLoadFunction Image load function.
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* @api
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*/
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ImageMapGuide.prototype.setImageLoadFunction = function (imageLoadFunction) {
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this.image_ = null;
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this.imageLoadFunction_ = imageLoadFunction;
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this.changed();
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};
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return ImageMapGuide;
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}(ImageSource));
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/**
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* @param {import("../extent.js").Extent} extent The map extents.
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* @param {import("../size.js").Size} size The viewport size.
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* @param {number} metersPerUnit The meters-per-unit value.
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* @param {number} dpi The display resolution.
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* @return {number} The computed map scale.
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*/
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function getScale(extent, size, metersPerUnit, dpi) {
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var mcsW = getWidth(extent);
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var mcsH = getHeight(extent);
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var devW = size[0];
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var devH = size[1];
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var mpp = 0.0254 / dpi;
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if (devH * mcsW > devW * mcsH) {
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return (mcsW * metersPerUnit) / (devW * mpp); // width limited
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}
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else {
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return (mcsH * metersPerUnit) / (devH * mpp); // height limited
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}
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}
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export default ImageMapGuide;
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//# sourceMappingURL=ImageMapGuide.js.map
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