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<h1 class="file-heading">File: src/pixi/display/Sprite.js</h1>
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<pre class="code prettyprint linenums">
/**
* @author Mat Groves http://matgroves.com/ @Doormat23
*/
PIXI.blendModes = {};
PIXI.blendModes.NORMAL = 0;
PIXI.blendModes.SCREEN = 1;
/**
* The SPrite object is the base for all textured objects that are rendered to the screen
*
* @class Sprite
* @extends DisplayObjectContainer
* @constructor
* @param texture {Texture} The texture for this sprite
* @type String
*/
PIXI.Sprite = function(texture)
{
PIXI.DisplayObjectContainer.call( this );
/**
* The anchor sets the origin point of the texture.
* The default is 0,0 this means the textures origin is the top left
* Setting than anchor to 0.5,0.5 means the textures origin is centered
* Setting the anchor to 1,1 would mean the textures origin points will be the bottom right
*
* @property anchor
* @type Point
*/
this.anchor = new PIXI.Point();
/**
* The texture that the sprite is using
*
* @property texture
* @type Texture
*/
this.texture = texture;
/**
* The blend mode of sprite.
* currently supports PIXI.blendModes.NORMAL and PIXI.blendModes.SCREEN
*
* @property blendMode
* @type Number
*/
this.blendMode = PIXI.blendModes.NORMAL;
/**
* The width of the sprite (this is initially set by the texture)
*
* @property _width
* @type Number
* @private
*/
this._width = 0;
/**
* The height of the sprite (this is initially set by the texture)
*
* @property _height
* @type Number
* @private
*/
this._height = 0;
if(texture.baseTexture.hasLoaded)
{
this.updateFrame = true;
}
else
{
this.onTextureUpdateBind = this.onTextureUpdate.bind(this);
this.texture.addEventListener( 'update', this.onTextureUpdateBind );
}
this.renderable = true;
}
// constructor
PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
PIXI.Sprite.prototype.constructor = PIXI.Sprite;
/**
* The width of the sprite, setting this will actually modify the scale to acheive the value set
*
* @property width
* @type Number
*/
Object.defineProperty(PIXI.Sprite.prototype, 'width', {
get: function() {
return this.scale.x * this.texture.frame.width;
},
set: function(value) {
this.scale.x = value / this.texture.frame.width
this._width = value;
}
});
/**
* The height of the sprite, setting this will actually modify the scale to acheive the value set
*
* @property height
* @type Number
*/
Object.defineProperty(PIXI.Sprite.prototype, 'height', {
get: function() {
return this.scale.y * this.texture.frame.height;
},
set: function(value) {
this.scale.y = value / this.texture.frame.height
this._height = value;
}
});
/**
* Sets the texture of the sprite
*
* @method setTexture
* @param texture {Texture} The PIXI texture that is displayed by the sprite
*/
PIXI.Sprite.prototype.setTexture = function(texture)
{
// stop current texture;
if(this.texture.baseTexture != texture.baseTexture)
{
this.textureChange = true;
this.texture = texture;
if(this.__renderGroup)
{
this.__renderGroup.updateTexture(this);
}
}
else
{
this.texture = texture;
}
this.updateFrame = true;
}
/**
* When the texture is updated, this event will fire to update the scale and frame
*
* @method onTextureUpdate
* @param event
* @private
*/
PIXI.Sprite.prototype.onTextureUpdate = function(event)
{
//this.texture.removeEventListener( 'update', this.onTextureUpdateBind );
// so if _width is 0 then width was not set..
if(this._width)this.scale.x = this._width / this.texture.frame.width;
if(this._height)this.scale.y = this._height / this.texture.frame.height;
this.updateFrame = true;
}
// some helper functions..
/**
*
* Helper function that creates a sprite that will contain a texture from the TextureCache based on the frameId
* The frame ids are created when a Texture packer file has been loaded
*
* @method fromFrame
* @static
* @param frameId {String} The frame Id of the texture in the cache
* @return {Sprite} A new Sprite using a texture from the texture cache matching the frameId
*/
PIXI.Sprite.fromFrame = function(frameId)
{
var texture = PIXI.TextureCache[frameId];
if(!texture)throw new Error("The frameId '"+ frameId +"' does not exist in the texture cache" + this);
return new PIXI.Sprite(texture);
}
/**
*
* Helper function that creates a sprite that will contain a texture based on an image url
* If the image is not in the texture cache it will be loaded
*
* @method fromImage
* @static
* @param imageId {String} The image url of the texture
* @return {Sprite} A new Sprite using a texture from the texture cache matching the image id
*/
PIXI.Sprite.fromImage = function(imageId)
{
var texture = PIXI.Texture.fromImage(imageId);
return new PIXI.Sprite(texture);
}
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