tv_xiaoyouxi/games/dwy/cocos2d-html5-v2.2.3/cocos2d/CCAtlasNode.js

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 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011      Zynga Inc.

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/** <p> cc.AtlasNode is a subclass of cc.Node that implements the cc.RGBAProtocol and<br/>
 * cc.TextureProtocol protocol</p>
 *
 * <p> It knows how to render a TextureAtlas object.  <br/>
 * If you are going to render a TextureAtlas consider subclassing cc.AtlasNode (or a subclass of cc.AtlasNode)</p>
 *
 * <p> All features from cc.Node are valid, plus the following features:  <br/>
 * - opacity and RGB colors </p>
 * @class
 * @extends cc.NodeRGBA
 */
cc.AtlasNode = cc.NodeRGBA.extend(/** @lends cc.AtlasNode# */{
    RGBAProtocol:true,
    //! chars per row
    _itemsPerRow:0,
    //! chars per column
    _itemsPerColumn:0,
    //! width of each char
    _itemWidth:0,
    //! height of each char
    _itemHeight:0,

    _colorUnmodified:null,
    _textureAtlas:null,

    // protocol variables
    _opacityModifyRGB:false,
    _blendFunc:null,

    // quads to draw
    _quadsToDraw:0,
    _ignoreContentScaleFactor:false,                               // This variable is only used for CCLabelAtlas FPS display. So plz don't modify its value.

    ctor:function () {
        cc.NodeRGBA.prototype.ctor.call(this);
        this._colorUnmodified = cc.white();
        this._blendFunc = {src:cc.BLEND_SRC, dst:cc.BLEND_DST};
        this._ignoreContentScaleFactor = false;
    },

    /** updates the Atlas (indexed vertex array).
     * Shall be overridden in subclasses
     */
    updateAtlasValues:function () {
        cc.log("cc.AtlasNode.updateAtlasValues(): Shall be overridden in subclasses") ;
    },

    /** cc.AtlasNode - RGBA protocol
     * @return {cc.Color3B}
     */
    getColor:function () {
        if (this._opacityModifyRGB)
            return this._colorUnmodified;
        return cc.NodeRGBA.prototype.getColor.call(this);
    },

    /**
     * @param {Boolean} value
     */
    setOpacityModifyRGB:function (value) {
        var oldColor = this.getColor();
        this._opacityModifyRGB = value;
        this.setColor(oldColor);
    },

    /**
     * @return {Boolean}
     */
    isOpacityModifyRGB:function () {
        return this._opacityModifyRGB;
    },

    /** cc.AtlasNode - CocosNodeTexture protocol
     * @return {cc.BlendFunc}
     */
    getBlendFunc:function () {
        return this._blendFunc;
    },

    /**
     * BlendFunc setter
     * @param {Number | cc.BlendFunc} src
     * @param {Number} dst
     */
    setBlendFunc:function (src, dst) {
        if (dst === undefined)
            this._blendFunc = src;
        else
            this._blendFunc = {src:src, dst:dst};
    },

    /**
     * @param {cc.TextureAtlas} value
     */
    setTextureAtlas:function (value) {
        this._textureAtlas = value;
    },

    /**
     * @return {cc.TextureAtlas}
     */
    getTextureAtlas:function () {
        return this._textureAtlas;
    },

    /**
     * @return {Number}
     */
    getQuadsToDraw:function () {
        return this._quadsToDraw;
    },

    /**
     * @param {Number} quadsToDraw
     */
    setQuadsToDraw:function (quadsToDraw) {
        this._quadsToDraw = quadsToDraw;
    },

    _textureForCanvas:null,
    _originalTexture:null,

    _uniformColor:null,
    _colorF32Array:null,

    /** initializes an cc.AtlasNode  with an Atlas file the width and height of each item and the quantity of items to render
     * @param {String} tile
     * @param {Number} tileWidth
     * @param {Number} tileHeight
     * @param {Number} itemsToRender
     * @return {Boolean}
     */
    initWithTileFile:function (tile, tileWidth, tileHeight, itemsToRender) {
        if(!tile)
            throw "cc.AtlasNode.initWithTileFile(): title should not be null";
        var texture = cc.TextureCache.getInstance().addImage(tile);
        return this.initWithTexture(texture, tileWidth, tileHeight, itemsToRender);
    },

    /**
     * initializes an CCAtlasNode  with a texture the width and height of each item measured in points and the quantity of items to render
     * @param {cc.Texture2D} texture
     * @param {Number} tileWidth
     * @param {Number} tileHeight
     * @param {Number} itemsToRender
     * @return {Boolean}
     */
    initWithTexture:null,

    _initWithTextureForCanvas:function(texture, tileWidth, tileHeight, itemsToRender){
        this._itemWidth = tileWidth;
        this._itemHeight = tileHeight;

        this._opacityModifyRGB = true;
        this._originalTexture = texture;
        if (!this._originalTexture) {
            cc.log("cocos2d: Could not initialize cc.AtlasNode. Invalid Texture.");
            return false;
        }
        this._textureForCanvas = this._originalTexture;
        this._calculateMaxItems();

        this._quadsToDraw = itemsToRender;
        return true;
    },

    _initWithTextureForWebGL:function(texture, tileWidth, tileHeight, itemsToRender){
        this._itemWidth = tileWidth;
        this._itemHeight = tileHeight;
        this._colorUnmodified = cc.white();
        this._opacityModifyRGB = true;

        this._blendFunc.src = cc.BLEND_SRC;
        this._blendFunc.dst = cc.BLEND_DST;

        var locRealColor = this._realColor;
        this._colorF32Array = new Float32Array([locRealColor.r / 255.0, locRealColor.g / 255.0, locRealColor.b / 255.0, this._realOpacity / 255.0]);
        this._textureAtlas = new cc.TextureAtlas();
        this._textureAtlas.initWithTexture(texture, itemsToRender);

        if (!this._textureAtlas) {
            cc.log("cocos2d: Could not initialize cc.AtlasNode. Invalid Texture.");
            return false;
        }

        this._updateBlendFunc();
        this._updateOpacityModifyRGB();
        this._calculateMaxItems();
        this._quadsToDraw = itemsToRender;

        //shader stuff
        this.setShaderProgram(cc.ShaderCache.getInstance().programForKey(cc.SHADER_POSITION_TEXTURE_UCOLOR));
        this._uniformColor = cc.renderContext.getUniformLocation(this.getShaderProgram().getProgram(), "u_color");
        return true;
    },

    draw:null,

    /**
     * @param {WebGLRenderingContext} ctx renderContext
     */
    _drawForWebGL:function (ctx) {
        var context = ctx || cc.renderContext;
        cc.NODE_DRAW_SETUP(this);
        cc.glBlendFunc(this._blendFunc.src, this._blendFunc.dst);
        context.uniform4fv(this._uniformColor, this._colorF32Array);
        this._textureAtlas.drawNumberOfQuads(this._quadsToDraw, 0);
    },

    /**
     * @param {cc.Color3B} color3
     */
    setColor:null,

    _setColorForCanvas:function (color3) {
        var locRealColor = this._realColor;
        if ((locRealColor.r == color3.r) && (locRealColor.g == color3.g) && (locRealColor.b == color3.b))
            return;
        var temp = new cc.Color3B(color3.r,color3.g,color3.b);
        this._colorUnmodified = color3;

        if (this._opacityModifyRGB) {
            var locDisplayedOpacity = this._displayedOpacity;
            temp.r = temp.r * locDisplayedOpacity / 255;
            temp.g = temp.g * locDisplayedOpacity / 255;
            temp.b = temp.b * locDisplayedOpacity / 255;
        }
        cc.NodeRGBA.prototype.setColor.call(this, color3);

        if (this.getTexture()) {
            var element = this._originalTexture.getHtmlElementObj();
            if(!element)
                return;
            var cacheTextureForColor = cc.TextureCache.getInstance().getTextureColors(element);
            if (cacheTextureForColor) {
                var textureRect = cc.rect(0, 0, element.width, element.height);
                element = cc.generateTintImage(element, cacheTextureForColor, this._realColor, textureRect);
                var locTexture = new cc.Texture2D();
                locTexture.initWithElement(element);
                locTexture.handleLoadedTexture();
                this.setTexture(locTexture);
            }
        }
    },

    _setColorForWebGL:function (color3) {
        var temp = cc.Color3B(color3.r,color3.g,color3.b);
        this._colorUnmodified = color3;
        var locDisplayedOpacity = this._displayedOpacity;
        if (this._opacityModifyRGB) {
            temp.r = temp.r * locDisplayedOpacity / 255;
            temp.g = temp.g * locDisplayedOpacity / 255;
            temp.b = temp.b * locDisplayedOpacity / 255;
        }
        cc.NodeRGBA.prototype.setColor.call(this, color3);
        var locDisplayedColor = this._displayedColor;
        this._colorF32Array = new Float32Array([locDisplayedColor.r / 255.0, locDisplayedColor.g / 255.0,
            locDisplayedColor.b / 255.0, locDisplayedOpacity / 255.0]);
    },

    /**
     * @param {Number} opacity
     */
    setOpacity: null,

    _setOpacityForCanvas: function (opacity) {
        cc.NodeRGBA.prototype.setOpacity.call(this, opacity);
        // special opacity for premultiplied textures
        if (this._opacityModifyRGB) {
            this.setColor(this._colorUnmodified);
        }
    },

    _setOpacityForWebGL: function (opacity) {
        cc.NodeRGBA.prototype.setOpacity.call(this, opacity);
        // special opacity for premultiplied textures
        if (this._opacityModifyRGB) {
            this.setColor(this._colorUnmodified);
        } else {
            var locDisplayedColor = this._displayedColor;
            this._colorF32Array = new Float32Array([locDisplayedColor.r / 255.0, locDisplayedColor.g / 255.0,
                locDisplayedColor.b / 255.0, this._displayedOpacity / 255.0]);
        }
    },

    // cc.Texture protocol
    /**
     * returns the used texture
     * @return {cc.Texture2D}
     */
    getTexture: null,

    _getTextureForCanvas: function () {
        return  this._textureForCanvas;
    },

    _getTextureForWebGL: function () {
        return  this._textureAtlas.getTexture();
    },

    /** sets a new texture. it will be retained
     * @param {cc.Texture2D} texture
     */
    setTexture: null,

    _setTextureForCanvas: function (texture) {
        this._textureForCanvas = texture;
    },

    _setTextureForWebGL: function (texture) {
        this._textureAtlas.setTexture(texture);
        this._updateBlendFunc();
        this._updateOpacityModifyRGB();
    },

    _calculateMaxItems:null,

    _calculateMaxItemsForCanvas:function () {
        var selTexture = this.getTexture();
        var size = selTexture.getContentSize();

        this._itemsPerColumn = 0 | (size.height / this._itemHeight);
        this._itemsPerRow = 0 | (size.width / this._itemWidth);
    },

    _calculateMaxItemsForWebGL:function () {
        var selTexture = this.getTexture();
        var size = selTexture.getContentSize();
        if(this._ignoreContentScaleFactor)
            size = selTexture.getContentSizeInPixels();

        this._itemsPerColumn = 0 | (size.height / this._itemHeight);
        this._itemsPerRow = 0 | (size.width / this._itemWidth);
    },

    _updateBlendFunc:function () {
        if (!this._textureAtlas.getTexture().hasPremultipliedAlpha()) {
            this._blendFunc.src = gl.SRC_ALPHA;
            this._blendFunc.dst = gl.ONE_MINUS_SRC_ALPHA;
        }
    },

    _updateOpacityModifyRGB:function () {
        this._opacityModifyRGB = this._textureAtlas.getTexture().hasPremultipliedAlpha();
    },

    _setIgnoreContentScaleFactor:function(ignoreContentScaleFactor){
        this._ignoreContentScaleFactor = ignoreContentScaleFactor;
    }
});

if(cc.Browser.supportWebGL){
    cc.AtlasNode.prototype.initWithTexture = cc.AtlasNode.prototype._initWithTextureForWebGL;
    cc.AtlasNode.prototype.draw = cc.AtlasNode.prototype._drawForWebGL;
    cc.AtlasNode.prototype.setColor = cc.AtlasNode.prototype._setColorForWebGL;
    cc.AtlasNode.prototype.setOpacity = cc.AtlasNode.prototype._setOpacityForWebGL;
    cc.AtlasNode.prototype.getTexture = cc.AtlasNode.prototype._getTextureForWebGL;
    cc.AtlasNode.prototype.setTexture = cc.AtlasNode.prototype._setTextureForWebGL;
    cc.AtlasNode.prototype._calculateMaxItems = cc.AtlasNode.prototype._calculateMaxItemsForWebGL;
} else {
    cc.AtlasNode.prototype.initWithTexture = cc.AtlasNode.prototype._initWithTextureForCanvas;
    cc.AtlasNode.prototype.draw = cc.Node.prototype.draw;
    cc.AtlasNode.prototype.setColor = cc.AtlasNode.prototype._setColorForCanvas;
    cc.AtlasNode.prototype.setOpacity = cc.AtlasNode.prototype._setOpacityForCanvas;
    cc.AtlasNode.prototype.getTexture = cc.AtlasNode.prototype._getTextureForCanvas;
    cc.AtlasNode.prototype.setTexture = cc.AtlasNode.prototype._setTextureForCanvas;
    cc.AtlasNode.prototype._calculateMaxItems = cc.AtlasNode.prototype._calculateMaxItemsForCanvas;
}

/** creates a cc.AtlasNode with an Atlas file the width and height of each item and the quantity of items to render
 * @param {String} tile
 * @param {Number} tileWidth
 * @param {Number} tileHeight
 * @param {Number} itemsToRender
 * @return {cc.AtlasNode}
 * @example
 * // example
 * var node = cc.AtlasNode.create("pathOfTile", 16, 16, 1);
 */
cc.AtlasNode.create = function (tile, tileWidth, tileHeight, itemsToRender) {
    var ret = new cc.AtlasNode();
    if (ret.initWithTileFile(tile, tileWidth, tileHeight, itemsToRender))
        return ret;
    return null;
};