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<h1 class="file-heading">File: src/pixi/loaders/BitmapFontLoader.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
/**
* The xml loader is used to load in XML bitmap font data ('xml' or 'fnt')
* To generate the data you can use http://www.angelcode.com/products/bmfont/
* This loader will also load the image file as the data.
* When loaded this class will dispatch a 'loaded' event
*
* @class BitmapFontLoader
* @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.BitmapFontLoader = function(url, crossorigin)
{
/*
* I use texture packer to load the assets..
* http://www.codeandweb.com/texturepacker
* make sure to set the format as 'JSON'
*/
PIXI.EventTarget.call(this);
/**
* 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(/[^\/]*$/, '');
/**
* [read-only] The texture of the bitmap font
*
* @property baseUrl
* @type String
*/
this.texture = null;
};
// constructor
PIXI.BitmapFontLoader.prototype.constructor = PIXI.BitmapFontLoader;
/**
* Loads the XML font data
*
* @method load
*/
PIXI.BitmapFontLoader.prototype.load = function()
{
this.ajaxRequest = new PIXI.AjaxRequest();
var scope = this;
this.ajaxRequest.onreadystatechange = function()
{
scope.onXMLLoaded();
};
this.ajaxRequest.open('GET', this.url, true);
if (this.ajaxRequest.overrideMimeType) this.ajaxRequest.overrideMimeType('application/xml');
this.ajaxRequest.send(null);
};
/**
* Invoked when the XML file is loaded, parses the data
*
* @method onXMLLoaded
* @private
*/
PIXI.BitmapFontLoader.prototype.onXMLLoaded = function()
{
if (this.ajaxRequest.readyState === 4)
{
if (this.ajaxRequest.status === 200 || window.location.protocol.indexOf('http') === -1)
{
var responseXML = this.ajaxRequest.responseXML;
if(!responseXML || /MSIE 9/i.test(navigator.userAgent) || navigator.isCocoonJS) {
if(typeof(window.DOMParser) === 'function') {
var domparser = new DOMParser();
responseXML = domparser.parseFromString(this.ajaxRequest.responseText, 'text/xml');
} else {
var div = document.createElement('div');
div.innerHTML = this.ajaxRequest.responseText;
responseXML = div;
}
}
var textureUrl = this.baseUrl + responseXML.getElementsByTagName('page')[0].getAttribute('file');
var image = new PIXI.ImageLoader(textureUrl, this.crossorigin);
this.texture = image.texture.baseTexture;
var data = {};
var info = responseXML.getElementsByTagName('info')[0];
var common = responseXML.getElementsByTagName('common')[0];
data.font = info.getAttribute('face');
data.size = parseInt(info.getAttribute('size'), 10);
data.lineHeight = parseInt(common.getAttribute('lineHeight'), 10);
data.chars = {};
//parse letters
var letters = responseXML.getElementsByTagName('char');
for (var i = 0; i < letters.length; i++)
{
var charCode = parseInt(letters[i].getAttribute('id'), 10);
var textureRect = new PIXI.Rectangle(
parseInt(letters[i].getAttribute('x'), 10),
parseInt(letters[i].getAttribute('y'), 10),
parseInt(letters[i].getAttribute('width'), 10),
parseInt(letters[i].getAttribute('height'), 10)
);
data.chars[charCode] = {
xOffset: parseInt(letters[i].getAttribute('xoffset'), 10),
yOffset: parseInt(letters[i].getAttribute('yoffset'), 10),
xAdvance: parseInt(letters[i].getAttribute('xadvance'), 10),
kerning: {},
texture: PIXI.TextureCache[charCode] = new PIXI.Texture(this.texture, textureRect)
};
}
//parse kernings
var kernings = responseXML.getElementsByTagName('kerning');
for (i = 0; i < kernings.length; i++)
{
var first = parseInt(kernings[i].getAttribute('first'), 10);
var second = parseInt(kernings[i].getAttribute('second'), 10);
var amount = parseInt(kernings[i].getAttribute('amount'), 10);
data.chars[second].kerning[first] = amount;
}
PIXI.BitmapText.fonts[data.font] = data;
var scope = this;
image.addEventListener('loaded', function() {
scope.onLoaded();
});
image.load();
}
}
};
/**
* Invoked when all files are loaded (xml/fnt and texture)
*
* @method onLoaded
* @private
*/
PIXI.BitmapFontLoader.prototype.onLoaded = function()
{
this.dispatchEvent({type: 'loaded', content: this});
};
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