<reponame>notrubp/Z
/**
 * Image loading helper.
 *
 * MIT License
 * Copyright (c) 2015 <EMAIL>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy,
 * modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software
 * is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
 * IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * @license MIT
 * @copyright <EMAIL> 2015
 */
(function(global) {
  "use strict";

  /*
   * Image loading helper.
   * @namespace Image
   */
  var Image = {};

  var images = {};

  /**
   * Get or create a new image. If it has already been loaded, the previously loaded image will be returned.
   * @function get
   * @memberof Image
   * @param {String} url
   * @returns {HTMLImageElement} The image element associated with the provided URL.
   */
  Image.get = function(url) {
    if (url in images) {
      return images[url];
    }

    var img = document.createElement('img');
    img.src = url;
    images[url] = img;

    return img;
  }

  /*
   * Exports
   */
  global.Image = Image;
})(window);
