pixi.js/docs/files/src_pixi_loaders_BitmapFontLoader.js.html
Mat Groves 847eb6c48e Docs updated
Fixed issue where alpha not being set correctly in canvas spriteBatch
Fixed issue where previous stage events did not get removed correctly
2014-01-28 00:08:50 +00:00

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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 (&#x27;xml&#x27; or &#x27;fnt&#x27;)
* 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 &#x27;loaded&#x27; 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 &#x27;JSON&#x27;
*/
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(/[^\/]*$/, &#x27;&#x27;);
/**
* [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 XMLHttpRequest();
var scope = this;
this.ajaxRequest.onreadystatechange = function()
{
scope.onXMLLoaded();
};
this.ajaxRequest.open(&#x27;GET&#x27;, this.url, true);
if (this.ajaxRequest.overrideMimeType) this.ajaxRequest.overrideMimeType(&#x27;application/xml&#x27;);
this.ajaxRequest.send(null);
};
/**
* Invoked when 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(&#x27;http&#x27;) === -1)
{
var responseXML = this.ajaxRequest.responseXML;
if(!responseXML || /MSIE 9/i.test(navigator.userAgent) || navigator.isCocoonJS) {
if(typeof(window.DOMParser) === &#x27;function&#x27;) {
var domparser = new DOMParser();
responseXML = domparser.parseFromString(this.ajaxRequest.responseText, &#x27;text/xml&#x27;);
} else {
var div = document.createElement(&#x27;div&#x27;);
div.innerHTML = this.ajaxRequest.responseText;
responseXML = div;
}
}
var textureUrl = this.baseUrl + responseXML.getElementsByTagName(&#x27;page&#x27;)[0].getAttribute(&#x27;file&#x27;);
var image = new PIXI.ImageLoader(textureUrl, this.crossorigin);
this.texture = image.texture.baseTexture;
var data = {};
var info = responseXML.getElementsByTagName(&#x27;info&#x27;)[0];
var common = responseXML.getElementsByTagName(&#x27;common&#x27;)[0];
data.font = info.getAttribute(&#x27;face&#x27;);
data.size = parseInt(info.getAttribute(&#x27;size&#x27;), 10);
data.lineHeight = parseInt(common.getAttribute(&#x27;lineHeight&#x27;), 10);
data.chars = {};
//parse letters
var letters = responseXML.getElementsByTagName(&#x27;char&#x27;);
for (var i = 0; i &lt; letters.length; i++)
{
var charCode = parseInt(letters[i].getAttribute(&#x27;id&#x27;), 10);
var textureRect = new PIXI.Rectangle(
parseInt(letters[i].getAttribute(&#x27;x&#x27;), 10),
parseInt(letters[i].getAttribute(&#x27;y&#x27;), 10),
parseInt(letters[i].getAttribute(&#x27;width&#x27;), 10),
parseInt(letters[i].getAttribute(&#x27;height&#x27;), 10)
);
data.chars[charCode] = {
xOffset: parseInt(letters[i].getAttribute(&#x27;xoffset&#x27;), 10),
yOffset: parseInt(letters[i].getAttribute(&#x27;yoffset&#x27;), 10),
xAdvance: parseInt(letters[i].getAttribute(&#x27;xadvance&#x27;), 10),
kerning: {},
texture: PIXI.TextureCache[charCode] = new PIXI.Texture(this.texture, textureRect)
};
}
//parse kernings
var kernings = responseXML.getElementsByTagName(&#x27;kerning&#x27;);
for (i = 0; i &lt; kernings.length; i++)
{
var first = parseInt(kernings[i].getAttribute(&#x27;first&#x27;), 10);
var second = parseInt(kernings[i].getAttribute(&#x27;second&#x27;), 10);
var amount = parseInt(kernings[i].getAttribute(&#x27;amount&#x27;), 10);
data.chars[second].kerning[first] = amount;
}
PIXI.BitmapText.fonts[data.font] = data;
var scope = this;
image.addEventListener(&#x27;loaded&#x27;, 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: &#x27;loaded&#x27;, content: this});
};
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