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<h1 class="file-heading">File: src/pixi/loaders/SpriteSheetLoader.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* The sprite sheet loader is used to load in JSON sprite sheet data
* To generate the data you can use http://www.codeandweb.com/texturepacker and publish in the 'JSON' format
* There is a free version so thats nice, although the paid version is great value for money.
* It is highly recommended to use Sprite sheets (also know as a 'texture atlas') as it means sprites can be batched and drawn together for highly increased rendering speed.
* Once the data has been loaded the frames are stored in the PIXI texture cache and can be accessed though PIXI.Texture.fromFrameId() and PIXI.Sprite.fromFrameId()
* This loader will load the image file that the Spritesheet points to as well as the data.
* When loaded this class will dispatch a 'loaded' event
*
* @class SpriteSheetLoader
* @uses EventTarget
* @constructor
* @param url {String} The url of the sprite sheet JSON file
* @param crossorigin {Boolean} Whether requests should be treated as crossorigin
*/
PIXI.SpriteSheetLoader = function (url, crossorigin) {
/*
* i use texture packer to load the assets..
* http://www.codeandweb.com/texturepacker
* make sure to set the format as 'JSON'
*/
/**
* The url of the bitmap font data
*
* @property url
* @type String
*/
this.url = url;
/**
* Whether the requests should be treated as cross origin
*
* @property crossorigin
* @type Boolean
*/
this.crossorigin = crossorigin;
/**
* [read-only] The base url of the bitmap font data
*
* @property baseUrl
* @type String
* @readOnly
*/
this.baseUrl = url.replace(/[^\/]*$/, '');
/**
* The texture being loaded
*
* @property texture
* @type Texture
*/
this.texture = null;
/**
* The frames of the sprite sheet
*
* @property frames
* @type Object
*/
this.frames = {};
};
// constructor
PIXI.SpriteSheetLoader.prototype.constructor = PIXI.SpriteSheetLoader;
PIXI.EventTarget.mixin(PIXI.SpriteSheetLoader.prototype);
/**
* This will begin loading the JSON file
*
* @method load
*/
PIXI.SpriteSheetLoader.prototype.load = function () {
var scope = this;
var jsonLoader = new PIXI.JsonLoader(this.url, this.crossorigin);
jsonLoader.on('loaded', function (event) {
scope.json = event.data.content.json;
scope.onLoaded();
});
jsonLoader.load();
};
/**
* Invoke when all files are loaded (json and texture)
*
* @method onLoaded
* @private
*/
PIXI.SpriteSheetLoader.prototype.onLoaded = function () {
this.emit('loaded', {
content: this
});
};
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