74 lines
1.7 KiB
JavaScript
74 lines
1.7 KiB
JavaScript
goog.provide('ol.source.StaticImage');
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goog.require('ol.Image');
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goog.require('ol.ImageUrlFunctionType');
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goog.require('ol.extent');
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goog.require('ol.proj');
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goog.require('ol.source.ImageSource');
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/**
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* @constructor
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* @extends {ol.source.ImageSource}
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* @param {ol.source.StaticImageOptions} options Static image options.
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*/
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ol.source.StaticImage = function(options) {
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var imageFunction = ol.source.StaticImage.createImageFunction(
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options.url);
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var imageExtent = options.imageExtent;
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var imageSize = options.imageSize;
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var imageResolution = (imageExtent[3] - imageExtent[2]) / imageSize[1];
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var projection = ol.proj.get(options.projection);
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goog.base(this, {
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attributions: options.attributions,
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crossOrigin: options.crossOrigin,
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extent: options.extent,
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projection: options.projection,
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imageUrlFunction: imageFunction,
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resolutions: [imageResolution]
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});
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/**
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* @private
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* @type {ol.Image}
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*/
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this.image_ = this.createImage(
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imageExtent, imageResolution, imageSize, projection);
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};
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goog.inherits(ol.source.StaticImage, ol.source.ImageSource);
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/**
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* @inheritDoc
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*/
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ol.source.StaticImage.prototype.getImage =
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function(extent, resolution, projection) {
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if (ol.extent.intersects(extent, this.image_.getExtent())) {
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return this.image_;
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}
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return null;
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};
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/**
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* @param {string|undefined} url URL.
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* @return {ol.ImageUrlFunctionType} Function.
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*/
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ol.source.StaticImage.createImageFunction = function(url) {
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return (
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/**
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* @param {ol.Extent} extent Extent.
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* @param {ol.Size} size Size.
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* @param {ol.Projection} projection Projection.
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* @return {string|undefined} URL.
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*/
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function(extent, size, projection) {
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return url;
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});
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};
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