// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating

// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel

// MIT license

/**
 * A polyfill for requestAnimationFrame
 *
 * @method requestAnimationFrame
 */
/**
 * A polyfill for cancelAnimationFrame
 *
 * @method cancelAnimationFrame
 */
var lastTime = 0;
var vendors = ['ms', 'moz', 'webkit', 'o'];
for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
    window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
    window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] ||
        window[vendors[x]+'CancelRequestAnimationFrame'];
}

if (!window.requestAnimationFrame)
    window.requestAnimationFrame = function(callback, element) {
        var currTime = new Date().getTime();
        var timeToCall = Math.max(0, 16 - (currTime - lastTime));
        var id = window.setTimeout(function() { callback(currTime + timeToCall); },
          timeToCall);
        lastTime = currTime + timeToCall;
        return id;
    };

if (!window.cancelAnimationFrame)
    window.cancelAnimationFrame = function(id) {
        clearTimeout(id);
    };

window.requestAnimFrame = window.requestAnimationFrame;

/**
 * Converts a hex color number to an [R, G, B] array
 *
 * @method hex2rgb
 * @param hex {Number}
 */
function hex2rgb(hex) {
    return [(hex >> 16 & 0xFF) / 255, ( hex >> 8 & 0xFF) / 255, (hex & 0xFF)/ 255];
}

/**
 * A polyfill for Function.prototype.bind
 *
 * @method bind
 */
if (typeof Function.prototype.bind != 'function') {
  Function.prototype.bind = (function () {
    var slice = Array.prototype.slice;
    return function (thisArg) {
      var target = this, boundArgs = slice.call(arguments, 1);

      if (typeof target != 'function') throw new TypeError();

      function bound() {
    var args = boundArgs.concat(slice.call(arguments));
    target.apply(this instanceof bound ? this : thisArg, args);
      }

      bound.prototype = (function F(proto) {
          if (proto) F.prototype = proto;
          if (!(this instanceof F)) return new F();
    })(target.prototype);

      return bound;
    };
  })();
}

/**
 * A wrapper for ajax requests to be handled cross browser
 *
 * @class AjaxRequest
 * @constructor
 */
var AjaxRequest = PIXI.AjaxRequest = function()
{
    var activexmodes = ["Msxml2.XMLHTTP.6.0", "Msxml2.XMLHTTP.3.0", "Microsoft.XMLHTTP"] //activeX versions to check for in IE

    if (window.ActiveXObject)
    { //Test for support for ActiveXObject in IE first (as XMLHttpRequest in IE7 is broken)
        for (var i=0; i<activexmodes.length; i++)
        {
            try{
                return new ActiveXObject(activexmodes[i])
            }
            catch(e){
                //suppress error
            }
        }
    }
    else if (window.XMLHttpRequest) // if Mozilla, Safari etc
    {
        return new XMLHttpRequest()
    }
    else
    {
        return false;
    }
}

/*
 * DEBUGGING ONLY
 */
PIXI.runList = function(item)
{
    console.log(">>>>>>>>>")
    console.log("_")
    var safe = 0;
    var tmp = item.first;
    console.log(tmp);

    while(tmp._iNext)
    {
        safe++;
        tmp = tmp._iNext;
        console.log(tmp);
    //  console.log(tmp);

        if(safe > 100)
        {
            console.log("BREAK")
            break
        }
    }
}