305 lines
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<h1 class="file-heading">File: src/pixi/loaders/ImageLoader.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 image loader class is responsible for loading images file formats ("jpeg", "jpg", "png" and "gif")
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* Once the image has been loaded it is stored in the PIXI texture cache and can be accessed though PIXI.Texture.fromFrameId() and PIXI.Sprite.fromFromeId()
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* When loaded this class will dispatch a 'loaded' event
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*
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* @class ImageLoader
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* @uses EventTarget
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* @constructor
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* @param url {String} The url of the image
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* @param crossorigin {Boolean} Whether requests should be treated as crossorigin
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*/
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PIXI.ImageLoader = function(url, crossorigin)
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{
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PIXI.EventTarget.call(this);
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/**
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* The texture being loaded
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*
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* @property texture
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* @type Texture
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*/
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this.texture = PIXI.Texture.fromImage(url, crossorigin);
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/**
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* if the image is loaded with loadFramedSpriteSheet
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* frames will contain the sprite sheet frames
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*
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*/
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this.frames = [];
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};
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// constructor
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PIXI.ImageLoader.prototype.constructor = PIXI.ImageLoader;
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/**
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* Loads image or takes it from cache
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*
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* @method load
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*/
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PIXI.ImageLoader.prototype.load = function()
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{
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if(!this.texture.baseTexture.hasLoaded)
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{
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var scope = this;
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this.texture.baseTexture.addEventListener("loaded", function()
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{
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scope.onLoaded();
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});
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}
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else
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{
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this.onLoaded();
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}
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};
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/**
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* Invoked when image file is loaded or it is already cached and ready to use
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*
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* @method onLoaded
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* @private
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*/
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PIXI.ImageLoader.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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/**
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* Loads image and split it to uniform sized frames
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*
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*
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* @method loadFramedSpriteSheet
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* @param frameWidth {Number} with of each frame
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* @param frameHeight {Number} height of each frame
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* @param textureName {String} if given, the frames will be cached in <textureName>-<ord> format
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*/
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PIXI.ImageLoader.prototype.loadFramedSpriteSheet = function(frameWidth, frameHeight, textureName)
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{
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this.frames = [];
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var cols = Math.floor(this.texture.width / frameWidth);
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var rows = Math.floor(this.texture.height / frameHeight);
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var i=0;
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for (var y=0; y<rows; y++)
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{
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for (var x=0; x<cols; x++,i++)
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{
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var texture = new PIXI.Texture(this.texture, {
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x: x*frameWidth,
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y: y*frameHeight,
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width: frameWidth,
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height: frameHeight
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});
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this.frames.push(texture);
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if (textureName) PIXI.TextureCache[textureName+'-'+i] = texture;
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}
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}
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if(!this.texture.baseTexture.hasLoaded)
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{
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var scope = this;
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this.texture.baseTexture.addEventListener("loaded", function() {
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scope.onLoaded();
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});
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}
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else
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{
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this.onLoaded();
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}
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};
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</pre>
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