cdf/src/old/loaders.js

A library for creating oldschool demo-like animations with JavaScript

(function(global){
  var lib = global.cdf || {};

  var ImageLoader = lib.ImageLoader = function () {
    var args=[];
    if(arguments[0] && arguments[0].forEach)args = arguments[0];
    else if(arguments.length)args = [].slice.call(arguments);
    this.paths = [];
    this.images = {};
    this.finished = [];
    for(var i = 0; i< args.length; i++){
      this.add(args[i]);
    }
  };

  ImageLoader.prototype = {
    add:function (url) {
      var instance = this;
      if(this.paths.indexOf(url)>=0)return;

      this.paths.push(url);
      var img = this.images[url] = new lib.Image(url);
      img.on('load', function(){
        instance.finished.push(url);
        instance.trigger('progress',[img,instance.paths.length, instance.finished.length], instance);
        if(instance.paths.length === instance.finished.length){
          instance.trigger('finished',[instance.images], instance);
        }
      });
      return this;
    }
  };

  lib.utils.eventer(ImageLoader.prototype);

  if(typeof module!=='undefined'&& module.exports){module.exports=lib;}else{global.cdf=lib;}
})(window);