Add ol.source.StaticImage

src/ol/source/staticimagesource.js

@@ -0,0 +1,61 @@
+goog.provide('ol.source.StaticImage');
+
+goog.require('ol.Image');
+goog.require('ol.ImageUrlFunctionType');
+goog.require('ol.source.ImageSource');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.ImageSource}
+ * @param {ol.source.StaticImageOptions} options Options.
+ */
+ol.source.StaticImage = function(options) {
+
+  var imageFunction = ol.source.StaticImage.createImageFunction(
+      options.url);
+
+  var imageExtent = options.imageExtent;
+  var imageSize = options.imageSize;
+  var imageResolution = imageExtent.getHeight() / imageSize.height;
+
+  goog.base(this, {
+    attributions: options.attributions,
+    crossOrigin: options.crossOrigin,
+    extent: options.extent,
+    projection: options.projection,
+    imageUrlFunction: imageFunction,
+    resolutions: [imageResolution]
+  });
+
+  /**
+   * @private
+   * @type {ol.Image}
+   */
+  this.image_ = this.createImage(imageExtent, imageResolution, imageSize);
+
+};
+goog.inherits(ol.source.StaticImage, ol.source.ImageSource);
+
+
+/**
+ * @inheritDoc
+ */
+ol.source.StaticImage.prototype.getImage = function(extent, resolution) {
+  if (extent.intersects(this.image_.getExtent())) {
+    return this.image_;
+  }
+  return null;
+};
+
+
+/**
+ * @param {string|undefined} url URL.
+ * @return {ol.ImageUrlFunctionType} Function.
+ */
+ol.source.StaticImage.createImageFunction = function(url) {
+  return function(extent, size) {
+    return url;
+  };
+};