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