mirror of
https://github.com/photonstorm/phaser
synced 2024-12-25 12:33:38 +00:00
196 lines
4.7 KiB
JavaScript
196 lines
4.7 KiB
JavaScript
/**
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* @author Mat Groves http://matgroves.com/ @Doormat23
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*/
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PIXI.blendModes = {};
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PIXI.blendModes.NORMAL = 0;
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PIXI.blendModes.SCREEN = 1;
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/**
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* The SPrite object is the base for all textured objects that are rendered to the screen
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*
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* @class Sprite
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* @extends DisplayObjectContainer
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* @constructor
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* @param texture {Texture} The texture for this sprite
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* @type String
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*/
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PIXI.Sprite = function(texture)
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{
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PIXI.DisplayObjectContainer.call( this );
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/**
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* The anchor sets the origin point of the texture.
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* The default is 0,0 this means the textures origin is the top left
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* Setting than anchor to 0.5,0.5 means the textures origin is centered
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* Setting the anchor to 1,1 would mean the textures origin points will be the bottom right
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*
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* @property anchor
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* @type Point
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*/
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this.anchor = new PIXI.Point();
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/**
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* The texture that the sprite is using
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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 = texture;
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/**
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* The blend mode of sprite.
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* currently supports PIXI.blendModes.NORMAL and PIXI.blendModes.SCREEN
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*
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* @property blendMode
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* @type Number
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*/
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this.blendMode = PIXI.blendModes.NORMAL;
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/**
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* The width of the sprite (this is initially set by the texture)
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*
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* @property _width
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* @type Number
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* @private
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*/
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this._width = 0;
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/**
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* The height of the sprite (this is initially set by the texture)
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*
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* @property _height
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* @type Number
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* @private
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*/
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this._height = 0;
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if(texture.baseTexture.hasLoaded)
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{
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this.updateFrame = true;
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}
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else
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{
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this.onTextureUpdateBind = this.onTextureUpdate.bind(this);
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this.texture.addEventListener( 'update', this.onTextureUpdateBind );
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}
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this.renderable = true;
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}
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// constructor
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PIXI.Sprite.prototype = Object.create( PIXI.DisplayObjectContainer.prototype );
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PIXI.Sprite.prototype.constructor = PIXI.Sprite;
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/**
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* The width of the sprite, setting this will actually modify the scale to acheive the value set
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*
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* @property width
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* @type Number
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*/
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Object.defineProperty(PIXI.Sprite.prototype, 'width', {
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get: function() {
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return this.scale.x * this.texture.frame.width;
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},
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set: function(value) {
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this.scale.x = value / this.texture.frame.width
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this._width = value;
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}
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});
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/**
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* The height of the sprite, setting this will actually modify the scale to acheive the value set
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*
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* @property height
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* @type Number
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*/
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Object.defineProperty(PIXI.Sprite.prototype, 'height', {
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get: function() {
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return this.scale.y * this.texture.frame.height;
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},
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set: function(value) {
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this.scale.y = value / this.texture.frame.height
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this._height = value;
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}
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});
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/**
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* Sets the texture of the sprite
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*
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* @method setTexture
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* @param texture {Texture} The PIXI texture that is displayed by the sprite
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*/
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PIXI.Sprite.prototype.setTexture = function(texture)
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{
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// stop current texture;
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if(this.texture.baseTexture != texture.baseTexture)
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{
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this.textureChange = true;
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this.texture = texture;
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if(this.__renderGroup)
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{
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this.__renderGroup.updateTexture(this);
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}
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}
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else
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{
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this.texture = texture;
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}
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this.updateFrame = true;
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}
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/**
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* When the texture is updated, this event will fire to update the scale and frame
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*
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* @method onTextureUpdate
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* @param event
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* @private
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*/
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PIXI.Sprite.prototype.onTextureUpdate = function(event)
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{
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//this.texture.removeEventListener( 'update', this.onTextureUpdateBind );
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// so if _width is 0 then width was not set..
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if(this._width)this.scale.x = this._width / this.texture.frame.width;
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if(this._height)this.scale.y = this._height / this.texture.frame.height;
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this.updateFrame = true;
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}
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// some helper functions..
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/**
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*
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* Helper function that creates a sprite that will contain a texture from the TextureCache based on the frameId
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* The frame ids are created when a Texture packer file has been loaded
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*
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* @method fromFrame
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* @static
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* @param frameId {String} The frame Id of the texture in the cache
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* @return {Sprite} A new Sprite using a texture from the texture cache matching the frameId
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*/
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PIXI.Sprite.fromFrame = function(frameId)
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{
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var texture = PIXI.TextureCache[frameId];
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if(!texture)throw new Error("The frameId '"+ frameId +"' does not exist in the texture cache" + this);
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return new PIXI.Sprite(texture);
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}
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/**
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*
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* Helper function that creates a sprite that will contain a texture based on an image url
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* If the image is not in the texture cache it will be loaded
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*
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* @method fromImage
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* @static
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* @param imageId {String} The image url of the texture
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* @return {Sprite} A new Sprite using a texture from the texture cache matching the image id
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*/
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PIXI.Sprite.fromImage = function(imageId)
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{
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var texture = PIXI.Texture.fromImage(imageId);
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return new PIXI.Sprite(texture);
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}
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