# Source: core/Game.js

    /**
    * @author       Richard Davey <rich@photonstorm.com>
    * @copyright    2014 Photon Storm Ltd.
    * @license      {@link https://github.com/photonstorm/phaser/blob/master/license.txt|MIT License}
    */

    /**
    * Game constructor
    *
    * Instantiate a new <code>Phaser.Game</code> object.
    * @class Phaser.Game
    * @classdesc This is where the magic happens. The Game object is the heart of your game,
    * providing quick access to common functions and handling the boot process.
    * "Hell, there are no rules here - we're trying to accomplish something."
    *                                                       Thomas A. Edison
    * @constructor
    * @param {number} [width=800] - The width of your game in game pixels.
    * @param {number} [height=600] - The height of your game in game pixels.
    * @param {number} [renderer=Phaser.AUTO] - Which renderer to use: Phaser.AUTO will auto-detect, Phaser.WEBGL, Phaser.CANVAS or Phaser.HEADLESS (no rendering at all).
    * @param {string|HTMLElement} [parent=''] - The DOM element into which this games canvas will be injected. Either a DOM ID (string) or the element itself.
    * @param {object} [state=null] - The default state object. A object consisting of Phaser.State functions (preload, create, update, render) or null.
    * @param {boolean} [transparent=false] - Use a transparent canvas background or not.
    * @param  {boolean} [antialias=true] - Draw all image textures anti-aliased or not. The default is for smooth textures, but disable if your game features pixel art.
    * @param {object} [physicsConfig=null] - A physics configuration object to pass to the Physics world on creation.
    */
    Phaser.Game = function (width, height, renderer, parent, state, transparent, antialias, physicsConfig) {

        /**
        * @property {number} id - Phaser Game ID (for when Pixi supports multiple instances).
        */
        this.id = Phaser.GAMES.push(this) - 1;

        /**
        * @property {object} config - The Phaser.Game configuration object.
        */
        this.config = null;

        /**
        * @property {object} physicsConfig - The Phaser.Physics.World configuration object.
        */
        this.physicsConfig = physicsConfig;

        /**
        * @property {string|HTMLElement} parent - The Games DOM parent.
        * @default
        */
        this.parent = '';

        /**
        * @property {number} width - The Game width (in pixels).
        * @default
        */
        this.width = 800;

        /**
        * @property {number} height - The Game height (in pixels).
        * @default
        */
        this.height = 600;

        /**
        * @property {boolean} transparent - Use a transparent canvas background or not.
        * @default
        */
        this.transparent = false;

        /**
        * @property {boolean} antialias - Anti-alias graphics. By default scaled images are smoothed in Canvas and WebGL, set anti-alias to false to disable this globally.
        * @default
        */
        this.antialias = true;

        /**
        * @property {PIXI.CanvasRenderer|PIXI.WebGLRenderer} renderer - The Pixi Renderer.
        */
        this.renderer = null;

        /**
        * @property {number} renderType - The Renderer this game will use. Either Phaser.AUTO, Phaser.CANVAS or Phaser.WEBGL.
        */
        this.renderType = Phaser.AUTO;

        /**
        * @property {Phaser.StateManager} state - The StateManager.
        */
        this.state = null;

        /**
        * @property {boolean} isBooted - Whether the game engine is booted, aka available.
        * @default
        */
        this.isBooted = false;

        /**
        * @property {boolean} id -Is game running or paused?
        * @default
        */
        this.isRunning = false;

        /**
        * @property {Phaser.RequestAnimationFrame} raf - Automatically handles the core game loop via requestAnimationFrame or setTimeout
        */
        this.raf = null;

        /**
        * @property {Phaser.GameObjectFactory} add - Reference to the Phaser.GameObjectFactory.
        */
        this.add = null;

        /**
        * @property {Phaser.GameObjectCreator} make - Reference to the GameObject Creator.
        */
        this.make = null;

        /**
        * @property {Phaser.Cache} cache - Reference to the assets cache.
        */
        this.cache = null;

        /**
        * @property {Phaser.Input} input - Reference to the input manager
        */
        this.input = null;

        /**
        * @property {Phaser.Loader} load - Reference to the assets loader.
        */
        this.load = null;

        /**
        * @property {Phaser.Math} math - Reference to the math helper.
        */
        this.math = null;

        /**
        * @property {Phaser.Net} net - Reference to the network class.
        */
        this.net = null;

        /**
        * @property {Phaser.ScaleManager} scale - The game scale manager.
        */
        this.scale = null;

        /**
        * @property {Phaser.SoundManager} sound - Reference to the sound manager.
        */
        this.sound = null;

        /**
        * @property {Phaser.Stage} stage - Reference to the stage.
        */
        this.stage = null;

        /**
        * @property {Phaser.Time} time - Reference to the core game clock.
        */
        this.time = null;

        /**
        * @property {Phaser.TweenManager} tweens - Reference to the tween manager.
        */
        this.tweens = null;

        /**
        * @property {Phaser.World} world - Reference to the world.
        */
        this.world = null;

        /**
        * @property {Phaser.Physics} physics - Reference to the physics manager.
        */
        this.physics = null;

        /**
        * @property {Phaser.RandomDataGenerator} rnd - Instance of repeatable random data generator helper.
        */
        this.rnd = null;

        /**
        * @property {Phaser.Device} device - Contains device information and capabilities.
        */
        this.device = null;

        /**
        * @property {Phaser.Camera} camera - A handy reference to world.camera.
        */
        this.camera = null;

        /**
        * @property {HTMLCanvasElement} canvas - A handy reference to renderer.view, the canvas that the game is being rendered in to.
        */
        this.canvas = null;

        /**
        * @property {CanvasRenderingContext2D} context - A handy reference to renderer.context (only set for CANVAS games, not WebGL)
        */
        this.context = null;

        /**
        * @property {Phaser.Utils.Debug} debug - A set of useful debug utilitie.
        */
        this.debug = null;

        /**
        * @property {Phaser.Particles} particles - The Particle Manager.
        */
        this.particles = null;

        /**
        * @property {boolean} stepping - Enable core loop stepping with Game.enableStep().
        * @default
        * @readonly
        */
        this.stepping = false;

        /**
        * @property {boolean} pendingStep - An internal property used by enableStep, but also useful to query from your own game objects.
        * @default
        * @readonly
        */
        this.pendingStep = false;

        /**
        * @property {number} stepCount - When stepping is enabled this contains the current step cycle.
        * @default
        * @readonly
        */
        this.stepCount = 0;

        /**
        * @property {Phaser.Signal} onPause - This event is fired when the game pauses.
        */
        this.onPause = null;

        /**
        * @property {Phaser.Signal} onResume - This event is fired when the game resumes from a paused state.
        */
        this.onResume = null;

        /**
        * @property {Phaser.Signal} onBlur - This event is fired when the game no longer has focus (typically on page hide).
        */
        this.onBlur = null;

        /**
        * @property {Phaser.Signal} onFocus - This event is fired when the game has focus (typically on page show).
        */
        this.onFocus = null;

        /**
        * @property {boolean} _paused - Is game paused?
        * @private
        */
        this._paused = false;

        /**
        * @property {boolean} _codePaused - Was the game paused via code or a visibility change?
        * @private
        */
        this._codePaused = false;

        //  Parse the configuration object (if any)
        if (arguments.length === 1 && typeof arguments[0] === 'object')
        {
            this.parseConfig(arguments[0]);
        }
        else
        {
            if (typeof width !== 'undefined')
            {
                this.width = width;
            }

            if (typeof height !== 'undefined')
            {
                this.height = height;
            }

            if (typeof renderer !== 'undefined')
            {
                this.renderer = renderer;
                this.renderType = renderer;
            }

            if (typeof parent !== 'undefined')
            {
                this.parent = parent;
            }

            if (typeof transparent !== 'undefined')
            {
                this.transparent = transparent;
            }

            if (typeof antialias !== 'undefined')
            {
                this.antialias = antialias;
            }

            this.rnd = new Phaser.RandomDataGenerator([(Date.now() * Math.random()).toString()]);

            this.state = new Phaser.StateManager(this, state);
        }

        var _this = this;

        this._onBoot = function () {
            return _this.boot();
        };

        if (document.readyState === 'complete' || document.readyState === 'interactive')
        {
            window.setTimeout(this._onBoot, 0);
        }
        else
        {
            document.addEventListener('DOMContentLoaded', this._onBoot, false);
            window.addEventListener('load', this._onBoot, false);
        }

        return this;

    };

    Phaser.Game.prototype = {

        /**
        * Parses a Game configuration object.
        *
        * @method Phaser.Game#parseConfig
        * @protected
        */
        parseConfig: function (config) {

            this.config = config;

            if (config['width'])
            {
                this.width = Phaser.Utils.parseDimension(config['width'], 0);
            }

            if (config['height'])
            {
                this.height = Phaser.Utils.parseDimension(config['height'], 1);
            }

            if (config['renderer'])
            {
                this.renderer = config['renderer'];
                this.renderType = config['renderer'];
            }

            if (config['parent'])
            {
                this.parent = config['parent'];
            }

            if (config['transparent'])
            {
                this.transparent = config['transparent'];
            }

            if (config['antialias'])
            {
                this.antialias = config['antialias'];
            }

            if (config['physicsConfig'])
            {
                this.physicsConfig = config['physicsConfig'];
            }

            var seed = [(Date.now() * Math.random()).toString()];

            if (config['seed'])
            {
                seed = config['seed'];
            }

            this.rnd = new Phaser.RandomDataGenerator(seed);

            var state = null;

            if (config['state'])
            {
                state = config['state'];
            }

            this.state = new Phaser.StateManager(this, state);

        },

        /**
        * Initialize engine sub modules and start the game.
        *
        * @method Phaser.Game#boot
        * @protected
        */
        boot: function () {

            if (this.isBooted)
            {
                return;
            }

            if (!document.body)
            {
                window.setTimeout(this._onBoot, 20);
            }
            else
            {
                document.removeEventListener('DOMContentLoaded', this._onBoot);
                window.removeEventListener('load', this._onBoot);

                this.onPause = new Phaser.Signal();
                this.onResume = new Phaser.Signal();
                this.onBlur = new Phaser.Signal();
                this.onFocus = new Phaser.Signal();

                this.isBooted = true;

                this.device = new Phaser.Device(this);
                this.math = Phaser.Math;

                this.stage = new Phaser.Stage(this, this.width, this.height);
                this.scale = new Phaser.ScaleManager(this, this.width, this.height);

                this.setUpRenderer();

                this.device.checkFullScreenSupport();

                this.world = new Phaser.World(this);
                this.add = new Phaser.GameObjectFactory(this);
                this.make = new Phaser.GameObjectCreator(this);
                this.cache = new Phaser.Cache(this);
                this.load = new Phaser.Loader(this);
                this.time = new Phaser.Time(this);
                this.tweens = new Phaser.TweenManager(this);
                this.input = new Phaser.Input(this);
                this.sound = new Phaser.SoundManager(this);
                this.physics = new Phaser.Physics(this, this.physicsConfig);
                this.particles = new Phaser.Particles(this);
                this.plugins = new Phaser.PluginManager(this);
                this.net = new Phaser.Net(this);
                this.debug = new Phaser.Utils.Debug(this);
                this.scratch = new Phaser.BitmapData(this, '__root', 1024, 1024);

                this.time.boot();
                this.stage.boot();
                this.world.boot();
                this.input.boot();
                this.sound.boot();
                this.state.boot();
                this.debug.boot();

                this.showDebugHeader();

                this.isRunning = true;

                if (this.config && this.config['forceSetTimeOut'])
                {
                    this.raf = new Phaser.RequestAnimationFrame(this, this.config['forceSetTimeOut']);
                }
                else
                {
                    this.raf = new Phaser.RequestAnimationFrame(this, false);
                }

                this.raf.start();
            }

        },

        /**
        * Displays a Phaser version debug header in the console.
        *
        * @method Phaser.Game#showDebugHeader
        * @protected
        */
        showDebugHeader: function () {

            var v = Phaser.VERSION;
            var r = 'Canvas';
            var a = 'HTML Audio';
            var c = 1;

            if (this.renderType === Phaser.WEBGL)
            {
                r = 'WebGL';
                c++;
            }
            else if (this.renderType == Phaser.HEADLESS)
            {
                r = 'Headless';
            }

            if (this.device.webAudio)
            {
                a = 'WebAudio';
                c++;
            }

            if (this.device.chrome)
            {
                var args = [
                    '%c %c %c Phaser v' + v + ' - ' + r + ' - ' + a + '  %c %c ' + ' http://phaser.io  %c %c ♥%c♥%c♥ ',
                    'background: #0cf300',
                    'background: #00bc17',
                    'color: #ffffff; background: #00711f;',
                    'background: #00bc17',
                    'background: #0cf300',
                    'background: #00bc17'
                ];

                for (var i = 0; i < 3; i++)
                {
                    if (i < c)
                    {
                        args.push('color: #ff2424; background: #fff');
                    }
                    else
                    {
                        args.push('color: #959595; background: #fff');
                    }
                }

                console.log.apply(console, args);
            }
            else if (window['console'])
            {
                console.log('Phaser v' + v + ' - Renderer: ' + r + ' - Audio: ' + a + ' - http://phaser.io');
            }

        },

        /**
        * Checks if the device is capable of using the requested renderer and sets it up or an alternative if not.
        *
        * @method Phaser.Game#setUpRenderer
        * @protected
        */
        setUpRenderer: function () {

            if (this.device.trident)
            {
                //  Pixi WebGL renderer on IE11 doesn't work correctly at the moment, the pre-multiplied alpha gets all washed out.
                //  So we're forcing canvas for now until this is fixed, sorry. It's got to be better than no game appearing at all, right?
                this.renderType = Phaser.CANVAS;
            }

            if (this.renderType === Phaser.HEADLESS || this.renderType === Phaser.CANVAS || (this.renderType === Phaser.AUTO && this.device.webGL === false))
            {
                if (this.device.canvas)
                {
                    if (this.renderType === Phaser.AUTO)
                    {
                        this.renderType = Phaser.CANVAS;
                    }

                    this.renderer = new PIXI.CanvasRenderer(this.width, this.height, this.canvas, this.transparent);
                    this.context = this.renderer.context;
                }
                else
                {
                    throw new Error('Phaser.Game - cannot create Canvas or WebGL context, aborting.');
                }
            }
            else
            {
                //  They requested WebGL, and their browser supports it
                this.renderType = Phaser.WEBGL;
                this.renderer = new PIXI.WebGLRenderer(this.width, this.height, this.canvas, this.transparent, this.antialias);
                this.context = null;
            }

            if (this.renderType !== Phaser.HEADLESS)
            {
                this.stage.smoothed = this.antialias;

                Phaser.Canvas.addToDOM(this.canvas, this.parent, true);
                Phaser.Canvas.setTouchAction(this.canvas);
            }

        },

        /**
        * The core game loop when in a paused state.
        *
        * @method Phaser.Game#update
        * @protected
        * @param {number} time - The current time as provided by RequestAnimationFrame.
        */
        update: function (time) {

            this.time.update(time);

            if (!this._paused && !this.pendingStep)
            {
                if (this.stepping)
                {
                    this.pendingStep = true;
                }

                this.debug.preUpdate();
                this.physics.preUpdate();
                this.state.preUpdate();
                this.plugins.preUpdate();
                this.stage.preUpdate();

                this.state.update();
                this.stage.update();
                this.tweens.update();
                this.sound.update();
                this.input.update();
                this.physics.update();
                this.particles.update();
                this.plugins.update();

                this.stage.postUpdate();
                this.plugins.postUpdate();
            }
            else
            {
                this.state.pauseUpdate();
                // this.input.update();
                this.debug.preUpdate();
            }

            if (this.renderType != Phaser.HEADLESS)
            {
                this.renderer.render(this.stage);
                this.plugins.render();
                this.state.render();
                this.plugins.postRender();
            }

        },

        /**
        * Enable core game loop stepping. When enabled you must call game.step() directly (perhaps via a DOM button?)
        * Calling step will advance the game loop by one frame. This is extremely useful for hard to track down errors!
        *
        * @method Phaser.Game#enableStep
        */
        enableStep: function () {

            this.stepping = true;
            this.pendingStep = false;
            this.stepCount = 0;

        },

        /**
        * Disables core game loop stepping.
        *
        * @method Phaser.Game#disableStep
        */
        disableStep: function () {

            this.stepping = false;
            this.pendingStep = false;

        },

        /**
        * When stepping is enabled you must call this function directly (perhaps via a DOM button?) to advance the game loop by one frame.
        * This is extremely useful to hard to track down errors! Use the internal stepCount property to monitor progress.
        *
        * @method Phaser.Game#step
        */
        step: function () {

            this.pendingStep = false;
            this.stepCount++;

        },

        /**
        * Nuke the entire game from orbit
        *
        * @method Phaser.Game#destroy
        */
        destroy: function () {

            this.raf.stop();

            this.input.destroy();
            this.state.destroy();
            this.physics.destroy();

            this.state = null;
            this.cache = null;
            this.input = null;
            this.load = null;
            this.sound = null;
            this.stage = null;
            this.time = null;
            this.world = null;
            this.isBooted = false;

        },

        /**
        * Called by the Stage visibility handler.
        *
        * @method Phaser.Game#gamePaused
        * @param {object} event - The DOM event that caused the game to pause, if any.
        * @protected
        */
        gamePaused: function (event) {

            //   If the game is already paused it was done via game code, so don't re-pause it
            if (!this._paused)
            {
                this._paused = true;
                this.time.gamePaused();
                this.sound.setMute();
                this.onPause.dispatch(event);
            }

        },

        /**
        * Called by the Stage visibility handler.
        *
        * @method Phaser.Game#gameResumed
        * @param {object} event - The DOM event that caused the game to pause, if any.
        * @protected
        */
        gameResumed: function (event) {

            //  Game is paused, but wasn't paused via code, so resume it
            if (this._paused && !this._codePaused)
            {
                this._paused = false;
                this.time.gameResumed();
                this.input.reset();
                this.sound.unsetMute();
                this.onResume.dispatch(event);
            }

        },

        /**
        * Called by the Stage visibility handler.
        *
        * @method Phaser.Game#focusLoss
        * @param {object} event - The DOM event that caused the game to pause, if any.
        * @protected
        */
        focusLoss: function (event) {

            this.onBlur.dispatch(event);

            this.gamePaused(event);

        },

        /**
        * Called by the Stage visibility handler.
        *
        * @method Phaser.Game#focusGain
        * @param {object} event - The DOM event that caused the game to pause, if any.
        * @protected
        */
        focusGain: function (event) {

            this.onFocus.dispatch(event);

            this.gameResumed(event);

        }

    };

    Phaser.Game.prototype.constructor = Phaser.Game;

    /**
    * The paused state of the Game. A paused game doesn't update any of its subsystems.
    * When a game is paused the onPause event is dispatched. When it is resumed the onResume event is dispatched.
    * @name Phaser.Game#paused
    * @property {boolean} paused - Gets and sets the paused state of the Game.
    */
    Object.defineProperty(Phaser.Game.prototype, "paused", {

        get: function () {
            return this._paused;
        },

        set: function (value) {

            if (value === true)
            {
                if (this._paused === false)
                {
                    this._paused = true;
                    this._codePaused = true;
                    this.sound.setMute();
                    this.time.gamePaused();
                    this.onPause.dispatch(this);
                }
            }
            else
            {
                if (this._paused)
                {
                    this._paused = false;
                    this._codePaused = false;
                    this.input.reset();
                    this.sound.unsetMute();
                    this.time.gameResumed();
                    this.onResume.dispatch(this);
                }
            }

        }

    });

    /**
    * "Deleted code is debugged code." - Jeff Sickel
    */