tv_xiaoyouxi/games/symdsb/frameworks/cocos2d-html5/CCAtlasNode.js

/****************************************************************************
 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011-2012 cocos2d-x.org
 Copyright (c) 2013-2014 Chukong Technologies Inc.

 http://www.cocos2d-x.org

 Permission is hereby granted, free of charge, to any person obtaining a copy
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 all copies or substantial portions of the Software.

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 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/**
 * <p>cc.AtlasNode is a subclass of cc.Node, it knows how to render a TextureAtlas object. </p>
 *
 * <p>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</p>
 *
 * <p>You can create a cc.AtlasNode with an Atlas file, the width, the height of each item and the quantity of items to render</p>
 *
 * @class
 * @extends cc.Node
 *
 * @param {String} tile
 * @param {Number} tileWidth
 * @param {Number} tileHeight
 * @param {Number} itemsToRender
 * @example
 * var node = new cc.AtlasNode("pathOfTile", 16, 16, 1);
 *
 * @property {cc.Texture2D}     texture         - Current used texture
 * @property {cc.TextureAtlas}  textureAtlas    - Texture atlas for cc.AtlasNode
 * @property {Number}           quadsToDraw     - Number of quads to draw
 */
cc.AtlasNode = cc.Node.extend(/** @lends cc.AtlasNode# */{
    textureAtlas: null,
    quadsToDraw: 0,

    //! chars per row
    _itemsPerRow: 0,
    //! chars per column
    _itemsPerColumn: 0,
    //! width of each char
    _itemWidth: 0,
    //! height of each char
    _itemHeight: 0,

    _colorUnmodified: null,

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

    // This variable is only used for CCLabelAtlas FPS display. So plz don't modify its value.
    _ignoreContentScaleFactor: false,
    _className: "AtlasNode",

    /**
     * <p>Constructor function, override it to extend the construction behavior, remember to call "this._super()" in the extended "ctor" function.</p>
     * @param {String} tile
     * @param {Number} tileWidth
     * @param {Number} tileHeight
     * @param {Number} itemsToRender
     */
    ctor: function (tile, tileWidth, tileHeight, itemsToRender) {
        cc.Node.prototype.ctor.call(this);
        this._colorUnmodified = cc.color.WHITE;
        this._blendFunc = {src: cc.BLEND_SRC, dst: cc.BLEND_DST};
        this._ignoreContentScaleFactor = false;

        itemsToRender !== undefined && this.initWithTileFile(tile, tileWidth, tileHeight, itemsToRender);
    },

    /**
     * Updates the Atlas (indexed vertex array).
     * Empty implementation, shall be overridden in subclasses
     * @function
     */
    updateAtlasValues: function () {
        cc.log(cc._LogInfos.AtlasNode_updateAtlasValues);
    },

    /**
     * Get color value of the atlas node
     * @function
     * @return {cc.Color}
     */
    getColor: function () {
        if (this._opacityModifyRGB)
            return this._colorUnmodified;
        return cc.Node.prototype.getColor.call(this);
    },

    /**
     * Set whether color should be changed with the opacity value,
     * if true, node color will change while opacity changes.
     * @function
     * @param {Boolean} value
     */
    setOpacityModifyRGB: function (value) {
        var oldColor = this.color;
        this._opacityModifyRGB = value;
        this.color = oldColor;
    },

    /**
     * Get whether color should be changed with the opacity value
     * @function
     * @return {Boolean}
     */
    isOpacityModifyRGB: function () {
        return this._opacityModifyRGB;
    },

    /**
     * Get node's blend function
     * @function
     * @return {cc.BlendFunc}
     */
    getBlendFunc: function () {
        return this._blendFunc;
    },

    /**
     * Set node's blend function
     * This function accept either cc.BlendFunc object or source value and destination value
     * @function
     * @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};
    },

    /**
     * Set the atlas texture
     * @function
     * @param {cc.TextureAtlas} value The texture
     */
    setTextureAtlas: function (value) {
        this.textureAtlas = value;
    },

    /**
     * Get the atlas texture
     * @function
     * @return {cc.TextureAtlas}
     */
    getTextureAtlas: function () {
        return this.textureAtlas;
    },

    /**
     * Get the number of quads to be rendered
     * @function
     * @return {Number}
     */
    getQuadsToDraw: function () {
        return this.quadsToDraw;
    },

    /**
     * Set the number of quads to be rendered
     * @function
     * @param {Number} quadsToDraw
     */
    setQuadsToDraw: function (quadsToDraw) {
        this.quadsToDraw = quadsToDraw;
    },

    _textureForCanvas: null,
    _originalTexture: null,

    _uniformColor: null,
    _colorF32Array: null,

    /**
     * Initializes an cc.AtlasNode object with an atlas texture file name, the width, the height of each tile and the quantity of tiles to render
     * @function
     * @param {String} tile             The atlas texture file name
     * @param {Number} tileWidth        The width of each tile
     * @param {Number} tileHeight       The height of each tile
     * @param {Number} itemsToRender    The quantity of tiles to be rendered
     * @return {Boolean}
     */
    initWithTileFile: function (tile, tileWidth, tileHeight, itemsToRender) {
        if (!tile)
            throw "cc.AtlasNode.initWithTileFile(): title should not be null";
        var texture = cc.textureCache.addImage(tile);
        return this.initWithTexture(texture, tileWidth, tileHeight, itemsToRender);
    },

    /**
     * Initializes an CCAtlasNode with an atlas texture, the width, the height of each tile and the quantity of tiles to render
     * @function
     * @param {cc.Texture2D} texture    The atlas texture
     * @param {Number} tileWidth        The width of each tile
     * @param {Number} tileHeight       The height of each tile
     * @param {Number} itemsToRender    The quantity of tiles to be rendered
     * @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(cc._LogInfos.AtlasNode__initWithTexture);
            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.color.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(cc._LogInfos.AtlasNode__initWithTexture);
            return false;
        }

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

        //shader stuff
        this.shaderProgram = cc.shaderCache.programForKey(cc.SHADER_POSITION_TEXTURE_UCOLOR);
        this._uniformColor = cc._renderContext.getUniformLocation(this.shaderProgram.getProgram(), "u_color");
        return true;
    },

    /**
     * Render function using the canvas 2d context or WebGL context, internal usage only, please do not call this function
     * @function
     * @param {CanvasRenderingContext2D | WebGLRenderingContext} ctx The render context
     */
    draw: null,

    _drawForWebGL: function (ctx) {
        var context = ctx || cc._renderContext;
        cc.nodeDrawSetup(this);
        cc.glBlendFunc(this._blendFunc.src, this._blendFunc.dst);
        if(this._uniformColor && this._colorF32Array){
            context.uniform4fv(this._uniformColor, this._colorF32Array);
            this.textureAtlas.drawNumberOfQuads(this.quadsToDraw, 0);
        }
    },

    /**
     * Set node's color
     * @function
     * @param {cc.Color} color Color object created with cc.color(r, g, b).
     */
    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 = cc.color(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.Node.prototype.setColor.call(this, color3);
        this._changeTextureColor();
    },

    _changeTextureColor: function(){
        var locTexture = this.getTexture();
        if (locTexture && this._originalTexture) {
            var element = this._originalTexture.getHtmlElementObj();
            if(!element)
                return;
            var locElement = locTexture.getHtmlElementObj();
            var textureRect = cc.rect(0, 0, element.width, element.height);
            if (locElement instanceof HTMLCanvasElement)
                cc.generateTintImageWithMultiply(element, this._displayedColor, textureRect, locElement);
            else {
                locElement = cc.generateTintImageWithMultiply(element, this._displayedColor, textureRect);
                locTexture = new cc.Texture2D();
                locTexture.initWithElement(locElement);
                locTexture.handleLoadedTexture();
                this.setTexture(locTexture);
            }
        }
    },

    _setColorForWebGL: function (color3) {
        var temp = cc.color(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.Node.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]);
    },

    /**
     * Set node's opacity
     * @function
     * @param {Number} opacity The opacity value
     */
    setOpacity: function (opacity) {
    },

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

    _setOpacityForWebGL: function (opacity) {
        cc.Node.prototype.setOpacity.call(this, opacity);
        // special opacity for premultiplied textures
        if (this._opacityModifyRGB) {
            this.color = 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]);
        }
    },

    /**
     * Get the current texture
     * @function
     * @return {cc.Texture2D}
     */
    getTexture: null,

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

    _getTextureForWebGL: function () {
        return  this.textureAtlas.texture;
    },

    /**
     * Replace the current texture with a new one
     * @function
     * @param {cc.Texture2D} texture    The new texture
     */
    setTexture: null,

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

    _setTextureForWebGL: function (texture) {
        this.textureAtlas.texture = texture;
        this._updateBlendFunc();
        this._updateOpacityModifyRGB();
    },

    _calculateMaxItems: null,

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

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

    _calculateMaxItemsForWebGL: function () {
        var selTexture = this.texture;
        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.texture.hasPremultipliedAlpha()) {
            this._blendFunc.src = cc.SRC_ALPHA;
            this._blendFunc.dst = cc.ONE_MINUS_SRC_ALPHA;
        }
    },

    _updateOpacityModifyRGB: function () {
        this._opacityModifyRGB = this.textureAtlas.texture.hasPremultipliedAlpha();
    },

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

var _p = cc.AtlasNode.prototype;
if (cc._renderType === cc._RENDER_TYPE_WEBGL) {
    _p.initWithTexture = _p._initWithTextureForWebGL;
    _p.draw = _p._drawForWebGL;
    _p.setColor = _p._setColorForWebGL;
    _p.setOpacity = _p._setOpacityForWebGL;
    _p.getTexture = _p._getTextureForWebGL;
    _p.setTexture = _p._setTextureForWebGL;
    _p._calculateMaxItems = _p._calculateMaxItemsForWebGL;
} else {
    _p.initWithTexture = _p._initWithTextureForCanvas;
    _p.draw = cc.Node.prototype.draw;
    _p.setColor = _p._setColorForCanvas;
    _p.setOpacity = _p._setOpacityForCanvas;
    _p.getTexture = _p._getTextureForCanvas;
    _p.setTexture = _p._setTextureForCanvas;
    _p._calculateMaxItems = _p._calculateMaxItemsForCanvas;
    if(!cc.sys._supportCanvasNewBlendModes)
        _p._changeTextureColor = function(){
            var locElement, locTexture = this.getTexture();
            if (locTexture && this._originalTexture) {
                locElement = locTexture.getHtmlElementObj();
                if (!locElement)
                    return;
                var element = this._originalTexture.getHtmlElementObj();
                var cacheTextureForColor = cc.textureCache.getTextureColors(element);
                if (cacheTextureForColor) {
                    var textureRect = cc.rect(0, 0, element.width, element.height);
                    if (locElement instanceof HTMLCanvasElement)
                        cc.generateTintImage(locElement, cacheTextureForColor, this._displayedColor, textureRect, locElement);
                    else {
                        locElement = cc.generateTintImage(locElement, cacheTextureForColor, this._displayedColor, textureRect);
                        locTexture = new cc.Texture2D();
                        locTexture.initWithElement(locElement);
                        locTexture.handleLoadedTexture();
                        this.setTexture(locTexture);
                    }
                }
            }
        };
}

// Override properties
cc.defineGetterSetter(_p, "opacity", _p.getOpacity, _p.setOpacity);
cc.defineGetterSetter(_p, "color", _p.getColor, _p.setColor);

// Extended properties
/** @expose */
_p.texture;
cc.defineGetterSetter(_p, "texture", _p.getTexture, _p.setTexture);
/** @expose */
_p.textureAtlas;
/** @expose */
_p.quadsToDraw;


/**
 * Creates a cc.AtlasNode with an Atlas file the width and height of each item and the quantity of items to render
 * @deprecated since v3.0, please use new construction instead
 * @function
 * @static
 * @param {String} tile
 * @param {Number} tileWidth
 * @param {Number} tileHeight
 * @param {Number} itemsToRender
 * @return {cc.AtlasNode}
 */
cc.AtlasNode.create = function (tile, tileWidth, tileHeight, itemsToRender) {
    return new cc.AtlasNode(tile, tileWidth, tileHeight, itemsToRender);
};