pixi.js/docs/files/src_pixi_utils_Utils.js.html at 6b744dd61050510cc329357231a327bc830e06af

Fork: 0
mark / pixi.js
Find file
Newer
Older
pixi.js / docs / files / src_pixi_utils_Utils.js.html
mathew groves on 10 Jul 2014 14 KB Republished files
Raw Blame History
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>src/pixi/utils/Utils.js - pixi.js</title>
    <link rel="stylesheet" href="http://yui.yahooapis.com/3.9.1/build/cssgrids/cssgrids-min.css">
    <link rel="stylesheet" href="../assets/vendor/prettify/prettify-min.css">
    <link rel="stylesheet" href="../assets/css/main.css" id="site_styles">
    <link rel="shortcut icon" type="image/png" href="../assets/favicon.png">
    <script src="http://yui.yahooapis.com/combo?3.9.1/build/yui/yui-min.js"></script>
</head>
<body class="yui3-skin-sam">

<div id="doc">
    <div id="hd" class="yui3-g header">
        <div class="yui3-u-3-4">
            
                <h1><img src="http://www.goodboydigital.com/pixijs/logo_small.png" title="pixi.js"></h1>
            
        </div>
        <div class="yui3-u-1-4 version">
            <em>API Docs for: 1.6.0</em>
        </div>
    </div>
    <div id="bd" class="yui3-g">

        <div class="yui3-u-1-4">
            <div id="docs-sidebar" class="sidebar apidocs">
                <div id="api-list">
    <h2 class="off-left">APIs</h2>
    <div id="api-tabview" class="tabview">
        <ul class="tabs">
            <li><a href="#api-classes">Classes</a></li>
            <li><a href="#api-modules">Modules</a></li>
        </ul>

        <div id="api-tabview-filter">
            <input type="search" id="api-filter" placeholder="Type to filter APIs">
        </div>

        <div id="api-tabview-panel">
            <ul id="api-classes" class="apis classes">
            
                <li><a href="../classes/AbstractFilter.html">AbstractFilter</a></li>
            
                <li><a href="../classes/AjaxRequest.html">AjaxRequest</a></li>
            
                <li><a href="../classes/AlphaMaskFilter.html">AlphaMaskFilter</a></li>
            
                <li><a href="../classes/AssetLoader.html">AssetLoader</a></li>
            
                <li><a href="../classes/AtlasLoader.html">AtlasLoader</a></li>
            
                <li><a href="../classes/autoDetectRenderer.html">autoDetectRenderer</a></li>
            
                <li><a href="../classes/BaseTexture.html">BaseTexture</a></li>
            
                <li><a href="../classes/BitmapFontLoader.html">BitmapFontLoader</a></li>
            
                <li><a href="../classes/BitmapText.html">BitmapText</a></li>
            
                <li><a href="../classes/BlurFilter.html">BlurFilter</a></li>
            
                <li><a href="../classes/CanvasGraphics.html">CanvasGraphics</a></li>
            
                <li><a href="../classes/CanvasMaskManager.html">CanvasMaskManager</a></li>
            
                <li><a href="../classes/CanvasRenderer.html">CanvasRenderer</a></li>
            
                <li><a href="../classes/CanvasTinter.html">CanvasTinter</a></li>
            
                <li><a href="../classes/Circle.html">Circle</a></li>
            
                <li><a href="../classes/ColorMatrixFilter.html">ColorMatrixFilter</a></li>
            
                <li><a href="../classes/ColorStepFilter.html">ColorStepFilter</a></li>
            
                <li><a href="../classes/ComplexPrimitiveShader.html">ComplexPrimitiveShader</a></li>
            
                <li><a href="../classes/DisplacementFilter.html">DisplacementFilter</a></li>
            
                <li><a href="../classes/DisplayObject.html">DisplayObject</a></li>
            
                <li><a href="../classes/DisplayObjectContainer.html">DisplayObjectContainer</a></li>
            
                <li><a href="../classes/DotScreenFilter.html">DotScreenFilter</a></li>
            
                <li><a href="../classes/Ellipse.html">Ellipse</a></li>
            
                <li><a href="../classes/EventTarget.html">EventTarget</a></li>
            
                <li><a href="../classes/FilterTexture.html">FilterTexture</a></li>
            
                <li><a href="../classes/getRecommendedRenderer.html">getRecommendedRenderer</a></li>
            
                <li><a href="../classes/Graphics.html">Graphics</a></li>
            
                <li><a href="../classes/GrayFilter.html">GrayFilter</a></li>
            
                <li><a href="../classes/ImageLoader.html">ImageLoader</a></li>
            
                <li><a href="../classes/InteractionData.html">InteractionData</a></li>
            
                <li><a href="../classes/InteractionManager.html">InteractionManager</a></li>
            
                <li><a href="../classes/InvertFilter.html">InvertFilter</a></li>
            
                <li><a href="../classes/JsonLoader.html">JsonLoader</a></li>
            
                <li><a href="../classes/Matrix.html">Matrix</a></li>
            
                <li><a href="../classes/Matrix2.html">Matrix2</a></li>
            
                <li><a href="../classes/MovieClip.html">MovieClip</a></li>
            
                <li><a href="../classes/NormalMapFilter.html">NormalMapFilter</a></li>
            
                <li><a href="../classes/PixelateFilter.html">PixelateFilter</a></li>
            
                <li><a href="../classes/PixiFastShader.html">PixiFastShader</a></li>
            
                <li><a href="../classes/PixiShader.html">PixiShader</a></li>
            
                <li><a href="../classes/Point.html">Point</a></li>
            
                <li><a href="../classes/Polygon.html">Polygon</a></li>
            
                <li><a href="../classes/PolyK.html">PolyK</a></li>
            
                <li><a href="../classes/PrimitiveShader.html">PrimitiveShader</a></li>
            
                <li><a href="../classes/Rectangle.html">Rectangle</a></li>
            
                <li><a href="../classes/Rope.html">Rope</a></li>
            
                <li><a href="../classes/SepiaFilter.html">SepiaFilter</a></li>
            
                <li><a href="../classes/Spine.html">Spine</a></li>
            
                <li><a href="../classes/Sprite.html">Sprite</a></li>
            
                <li><a href="../classes/SpriteBatch.html">SpriteBatch</a></li>
            
                <li><a href="../classes/SpriteSheetLoader.html">SpriteSheetLoader</a></li>
            
                <li><a href="../classes/Stage.html">Stage</a></li>
            
                <li><a href="../classes/Strip.html">Strip</a></li>
            
                <li><a href="../classes/Text.html">Text</a></li>
            
                <li><a href="../classes/Texture.html">Texture</a></li>
            
                <li><a href="../classes/TilingSprite.html">TilingSprite</a></li>
            
                <li><a href="../classes/TwistFilter.html">TwistFilter</a></li>
            
                <li><a href="../classes/WebGLFilterManager.html">WebGLFilterManager</a></li>
            
                <li><a href="../classes/WebGLGraphics.html">WebGLGraphics</a></li>
            
                <li><a href="../classes/WebGLMaskManager.html">WebGLMaskManager</a></li>
            
                <li><a href="../classes/WebGLRenderer.html">WebGLRenderer</a></li>
            
                <li><a href="../classes/WebGLShaderManager.html">WebGLShaderManager</a></li>
            
                <li><a href="../classes/WebGLSpriteBatch.html">WebGLSpriteBatch</a></li>
            
                <li><a href="../classes/WebGLStencilManager.html">WebGLStencilManager</a></li>
            
            </ul>

            <ul id="api-modules" class="apis modules">
            
                <li><a href="../modules/PIXI.html">PIXI</a></li>
            
            </ul>
        </div>
    </div>
</div>

            </div>
        </div>
        <div class="yui3-u-3-4">
                <div id="api-options">
        Show:
        <label for="api-show-inherited">
            <input type="checkbox" id="api-show-inherited" checked>
            Inherited
        </label>

        <label for="api-show-protected">
            <input type="checkbox" id="api-show-protected">
            Protected
        </label>

        <label for="api-show-private">
            <input type="checkbox" id="api-show-private">
            Private
        </label>
        <label for="api-show-deprecated">
            <input type="checkbox" id="api-show-deprecated">
            Deprecated
        </label>

    </div>


            <div class="apidocs">
                <div id="docs-main">
                    <div class="content">
                        <h1 class="file-heading">File: src/pixi/utils/Utils.js</h1>

<div class="file">
    <pre class="code prettyprint linenums">
/**
 * @author Mat Groves http://matgroves.com/ @Doormat23
 */
 
// 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
 * You can actually use both requestAnimationFrame and requestAnimFrame, 
 * you will still benefit from the polyfill
 *
 * @method requestAnimationFrame
 */
/**
 * A polyfill for cancelAnimationFrame
 *
 * @method cancelAnimationFrame
 */
var lastTime = 0;
var vendors = [&#x27;ms&#x27;, &#x27;moz&#x27;, &#x27;webkit&#x27;, &#x27;o&#x27;];
for(var x = 0; x &lt; vendors.length &amp;&amp; !window.requestAnimationFrame; ++x) {
    window.requestAnimationFrame = window[vendors[x] + &#x27;RequestAnimationFrame&#x27;];
    window.cancelAnimationFrame = window[vendors[x] + &#x27;CancelAnimationFrame&#x27;] ||
        window[vendors[x] + &#x27;CancelRequestAnimationFrame&#x27;];
}

if (!window.requestAnimationFrame) {
    window.requestAnimationFrame = function(callback) {
        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}
 */
PIXI.hex2rgb = function(hex) {
    return [(hex &gt;&gt; 16 &amp; 0xFF) / 255, ( hex &gt;&gt; 8 &amp; 0xFF) / 255, (hex &amp; 0xFF)/ 255];
};

/**
 * Converts a color as an [R, G, B] array to a hex number
 *
 * @method rgb2hex
 * @param rgb {Array}
 */
PIXI.rgb2hex = function(rgb) {
    return ((rgb[0]*255 &lt;&lt; 16) + (rgb[1]*255 &lt;&lt; 8) + rgb[2]*255);
};

/**
 * A polyfill for Function.prototype.bind
 *
 * @method bind
 */
if (typeof Function.prototype.bind !== &#x27;function&#x27;) {
    Function.prototype.bind = (function () {
        var slice = Array.prototype.slice;
        return function (thisArg) {
            var target = this, boundArgs = slice.call(arguments, 1);

            if (typeof target !== &#x27;function&#x27;) 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
 */
PIXI.AjaxRequest = function()
{
    var activexmodes = [&#x27;Msxml2.XMLHTTP.6.0&#x27;, &#x27;Msxml2.XMLHTTP.3.0&#x27;, &#x27;Microsoft.XMLHTTP&#x27;]; //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&lt;activexmodes.length; i++)
        {
            try{
                return new window.ActiveXObject(activexmodes[i]);
            }
            catch(e) {
                //suppress error
            }
        }
    }
    else if (window.XMLHttpRequest) // if Mozilla, Safari etc
    {
        return new window.XMLHttpRequest();
    }
    else
    {
        return false;
    }
};
/*
PIXI.packColorRGBA = function(r, g, b, a)//r, g, b, a)
{
  //  console.log(r, b, c, d)
  return (Math.floor((r)*63) &lt;&lt; 18) | (Math.floor((g)*63) &lt;&lt; 12) | (Math.floor((b)*63) &lt;&lt; 6);// | (Math.floor((a)*63))
  //  i = i | (Math.floor((a)*63));
   // return i;
   // var r = (i / 262144.0 ) / 64;
   // var g = (i / 4096.0)%64 / 64;
  //  var b = (i / 64.0)%64 / 64;
  //  var a = (i)%64 / 64;
     
  //  console.log(r, g, b, a);
  //  return i;

};
*/
/*
PIXI.packColorRGB = function(r, g, b)//r, g, b, a)
{
    return (Math.floor((r)*255) &lt;&lt; 16) | (Math.floor((g)*255) &lt;&lt; 8) | (Math.floor((b)*255));
};

PIXI.unpackColorRGB = function(r, g, b)//r, g, b, a)
{
    return (Math.floor((r)*255) &lt;&lt; 16) | (Math.floor((g)*255) &lt;&lt; 8) | (Math.floor((b)*255));
};
*/

/**
 * Checks whether the Canvas BlendModes are supported by the current browser
 *
 * @method canUseNewCanvasBlendModes
 * @return {Boolean} whether they are supported
 */
PIXI.canUseNewCanvasBlendModes = function()
{
    var canvas = document.createElement(&#x27;canvas&#x27;);
    canvas.width = 1;
    canvas.height = 1;
    var context = canvas.getContext(&#x27;2d&#x27;);
    context.fillStyle = &#x27;#000&#x27;;
    context.fillRect(0,0,1,1);
    context.globalCompositeOperation = &#x27;multiply&#x27;;
    context.fillStyle = &#x27;#fff&#x27;;
    context.fillRect(0,0,1,1);
    return context.getImageData(0,0,1,1).data[0] === 0;
};

/**
 * Given a number, this function returns the closest number that is a power of two
 * this function is taken from Starling Framework as its pretty neat ;)
 *
 * @method getNextPowerOfTwo
 * @param number {Number}
 * @return {Number} the closest number that is a power of two
 */
PIXI.getNextPowerOfTwo = function(number)
{
    if (number &gt; 0 &amp;&amp; (number &amp; (number - 1)) === 0) // see: http://goo.gl/D9kPj
        return number;
    else
    {
        var result = 1;
        while (result &lt; number) result &lt;&lt;= 1;
        return result;
    }
};

    </pre>
</div>

                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
<script src="../assets/vendor/prettify/prettify-min.js"></script>
<script>prettyPrint();</script>
<script src="../assets/js/yui-prettify.js"></script>
<script src="../assets/../api.js"></script>
<script src="../assets/js/api-filter.js"></script>
<script src="../assets/js/api-list.js"></script>
<script src="../assets/js/api-search.js"></script>
<script src="../assets/js/apidocs.js"></script>
</body>
</html>