CCLabelTTF.js

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

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/**
 * <p>cc.LabelTTF is a subclass of cc.TextureNode that knows how to render text labels with system font or a ttf font file<br/>
 * All features from cc.Sprite are valid in cc.LabelTTF<br/>
 * cc.LabelTTF objects are slow for js-binding on mobile devices.<br/>
 * Consider using cc.LabelAtlas or cc.LabelBMFont instead.<br/>
 * You can create a cc.LabelTTF from a font name, alignment, dimension and font size or a cc.FontDefinition object.</p>
 * @class
 * @extends cc.Sprite
 *
 * @param {String} text
 * @param {String|cc.FontDefinition} [fontName="Arial"]
 * @param {Number} [fontSize=16]
 * @param {cc.Size} [dimensions=cc.size(0,0)]
 * @param {Number} [hAlignment=cc.TEXT_ALIGNMENT_LEFT]
 * @param {Number} [vAlignment=cc.VERTICAL_TEXT_ALIGNMENT_TOP]
 * @example
 * var myLabel = new cc.LabelTTF('label text',  'Times New Roman', 32, cc.size(320,32), cc.TEXT_ALIGNMENT_LEFT);
 *
 * var fontDef = new cc.FontDefinition();
 * fontDef.fontName = "Arial";
 * fontDef.fontSize = "32";
 * var myLabel = new cc.LabelTTF('label text',  fontDef);
 *
 * @property {String}       string          - Content string of label
 * @property {Number}       textAlign       - Horizontal Alignment of label: cc.TEXT_ALIGNMENT_LEFT|cc.TEXT_ALIGNMENT_CENTER|cc.TEXT_ALIGNMENT_RIGHT
 * @property {Number}       verticalAlign   - Vertical Alignment of label: cc.VERTICAL_TEXT_ALIGNMENT_TOP|cc.VERTICAL_TEXT_ALIGNMENT_CENTER|cc.VERTICAL_TEXT_ALIGNMENT_BOTTOM
 * @property {Number}       fontSize        - Font size of label
 * @property {String}       fontName        - Font name of label
 * @property {String}       font            - The label font with a style string: e.g. "18px Verdana"
 * @property {Number}       boundingWidth   - Width of the bounding box of label, the real content width is limited by boundingWidth
 * @property {Number}       boundingHeight  - Height of the bounding box of label, the real content height is limited by boundingHeight
 * @property {cc.Color}     fillStyle       - The fill color
 * @property {cc.Color}     strokeStyle     - The stroke color
 * @property {Number}       lineWidth       - The line width for stroke
 * @property {Number}       shadowOffsetX   - The x axis offset of shadow
 * @property {Number}       shadowOffsetY   - The y axis offset of shadow
 * @property {Number}       shadowOpacity   - The opacity of shadow
 * @property {Number}       shadowBlur      - The blur size of shadow
 */
cc.LabelTTF = cc.Sprite.extend(/** @lends cc.LabelTTF# */{
    _dimensions: null,
    _hAlignment: cc.TEXT_ALIGNMENT_CENTER,
    _vAlignment: cc.VERTICAL_TEXT_ALIGNMENT_TOP,
    _fontName: null,
    _fontSize: 0.0,
    _string: "",
    _originalText: null,
    _onCacheCanvasMode: true,

    // font shadow
    _shadowEnabled: false,
    _shadowOffset: null,
    _shadowOpacity: 0,
    _shadowBlur: 0,
    _shadowColor: null,

    // font stroke
    _strokeEnabled: false,
    _strokeColor: null,
    _strokeSize: 0,

    // font tint
    _textFillColor: null,

    _strokeShadowOffsetX: 0,
    _strokeShadowOffsetY: 0,
    _needUpdateTexture: false,

    _lineWidths: null,
    _className: "LabelTTF",

    //for web
    _fontStyle: "normal",
    _fontWeight: "normal",
    _lineHeight: "normal",

    /**
     * Initializes the cc.LabelTTF with a font name, alignment, dimension and font size, do not call it by yourself,
     * you should pass the correct arguments in constructor to initialize the label.
     * @param {String} label string
     * @param {String} fontName
     * @param {Number} fontSize
     * @param {cc.Size} [dimensions=]
     * @param {Number} [hAlignment=]
     * @param {Number} [vAlignment=]
     * @return {Boolean} return false on error
     */
    initWithString: function (label, fontName, fontSize, dimensions, hAlignment, vAlignment) {
        var strInfo;
        if (label)
            strInfo = label + "";
        else
            strInfo = "";

        fontSize = fontSize || 16;
        dimensions = dimensions || cc.size(0, 0/*fontSize*/);
        hAlignment = hAlignment || cc.TEXT_ALIGNMENT_LEFT;
        vAlignment = vAlignment || cc.VERTICAL_TEXT_ALIGNMENT_TOP;

        this._opacityModifyRGB = false;
        this._dimensions = cc.size(dimensions.width, dimensions.height);
        this._fontName = fontName || "Arial";
        this._hAlignment = hAlignment;
        this._vAlignment = vAlignment;

        this._fontSize = fontSize;
        this._renderCmd._setFontStyle(this._fontName, fontSize, this._fontStyle, this._fontWeight);
        this.string = strInfo;
        this._renderCmd._setColorsString();
        this._renderCmd._updateTexture();
        this._setUpdateTextureDirty();
        return true;
    },

    _setUpdateTextureDirty: function () {
        this._needUpdateTexture = true;
        this._renderCmd.setDirtyFlag(cc.Node._dirtyFlags.textDirty);
    },

    ctor: function (text, fontName, fontSize, dimensions, hAlignment, vAlignment) {
        cc.Sprite.prototype.ctor.call(this);

        this._dimensions = cc.size(0, 0);
        this._hAlignment = cc.TEXT_ALIGNMENT_LEFT;
        this._vAlignment = cc.VERTICAL_TEXT_ALIGNMENT_TOP;
        this._opacityModifyRGB = false;
        this._fontName = "Arial";

        this._shadowEnabled = false;
        this._shadowOffset = cc.p(0, 0);
        this._shadowOpacity = 0;
        this._shadowBlur = 0;

        this._strokeEnabled = false;
        this._strokeColor = cc.color(255, 255, 255, 255);
        this._strokeSize = 0;

        this._textFillColor = cc.color(255, 255, 255, 255);
        this._strokeShadowOffsetX = 0;
        this._strokeShadowOffsetY = 0;
        this._needUpdateTexture = false;

        this._lineWidths = [];
        this._renderCmd._setColorsString();
        this._textureLoaded = true;

        if (fontName && fontName instanceof cc.FontDefinition) {
            this.initWithStringAndTextDefinition(text, fontName);
        } else {
            cc.LabelTTF.prototype.initWithString.call(this, text, fontName, fontSize, dimensions, hAlignment, vAlignment);
        }
    },

    init: function () {
        return this.initWithString(" ", this._fontName, this._fontSize);
    },

    description: function () {
        return "<cc.LabelTTF | FontName =" + this._fontName + " FontSize = " + this._fontSize.toFixed(1) + ">";
    },

    getLineHeight: function () {
        return !this._lineHeight || this._lineHeight.charAt ?
            this._renderCmd._getFontClientHeight() :
            this._lineHeight || this._renderCmd._getFontClientHeight();
    },

    setLineHeight: function (lineHeight) {
        this._lineHeight = lineHeight;
    },

    /**
     * Returns the text of the label
     * @return {String}
     */
    getString: function () {
        return this._string;
    },

    /**
     * Returns Horizontal Alignment of cc.LabelTTF
     * @return {cc.TEXT_ALIGNMENT_LEFT|cc.TEXT_ALIGNMENT_CENTER|cc.TEXT_ALIGNMENT_RIGHT}
     */
    getHorizontalAlignment: function () {
        return this._hAlignment;
    },

    /**
     * Returns Vertical Alignment of cc.LabelTTF
     * @return {cc.VERTICAL_TEXT_ALIGNMENT_TOP|cc.VERTICAL_TEXT_ALIGNMENT_CENTER|cc.VERTICAL_TEXT_ALIGNMENT_BOTTOM}
     */
    getVerticalAlignment: function () {
        return this._vAlignment;
    },

    /**
     * Returns the dimensions of cc.LabelTTF, the dimension is the maximum size of the label, set it so that label will automatically change lines when necessary.
     * @see cc.LabelTTF#setDimensions, cc.LabelTTF#boundingWidth and cc.LabelTTF#boundingHeight
     * @return {cc.Size}
     */
    getDimensions: function () {
        return cc.size(this._dimensions);
    },

    /**
     * Returns font size of cc.LabelTTF
     * @return {Number}
     */
    getFontSize: function () {
        return this._fontSize;
    },

    /**
     * Returns font name of cc.LabelTTF
     * @return {String}
     */
    getFontName: function () {
        return this._fontName;
    },

    /**
     * Initializes the CCLabelTTF with a font name, alignment, dimension and font size, do not call it by yourself, you should pass the correct arguments in constructor to initialize the label.
     * @param {String} text
     * @param {cc.FontDefinition} textDefinition
     * @return {Boolean}
     */
    initWithStringAndTextDefinition: function (text, textDefinition) {
        // prepare everything needed to render the label
        this._updateWithTextDefinition(textDefinition, false);
        // set the string
        this.string = text;
        return true;
    },

    /**
     * Sets the text definition used by this label
     * @param {cc.FontDefinition} theDefinition
     */
    setTextDefinition: function (theDefinition) {
        if (theDefinition)
            this._updateWithTextDefinition(theDefinition, true);
    },

    /**
     * Extract the text definition used by this label
     * @return {cc.FontDefinition}
     */
    getTextDefinition: function () {
        return this._prepareTextDefinition(false);
    },

    /**
     * Enable or disable shadow for the label
     * @param {cc.Color | Number} a Color or The x axis offset of the shadow
     * @param {cc.Size | Number} b Size or The y axis offset of the shadow
     * @param {Number} c The blur size of the shadow or The opacity of the shadow (0 to 1)
     * @param {null | Number} d Null or The blur size of the shadow
     * @example
     *   old:
     *     labelttf.enableShadow(shadowOffsetX, shadowOffsetY, shadowOpacity, shadowBlur);
     *   new:
     *     labelttf.enableShadow(shadowColor, offset, blurRadius);
     */
    enableShadow: function (a, b, c, d) {
        if (a.r != null && a.g != null && a.b != null && a.a != null) {
            this._enableShadow(a, b, c);
        } else {
            this._enableShadowNoneColor(a, b, c, d);
        }
    },

    _enableShadowNoneColor: function (shadowOffsetX, shadowOffsetY, shadowOpacity, shadowBlur) {
        shadowOpacity = shadowOpacity || 0.5;
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        var locShadowOffset = this._shadowOffset;
        if (locShadowOffset && (locShadowOffset.x !== shadowOffsetX) || (locShadowOffset._y !== shadowOffsetY)) {
            locShadowOffset.x = shadowOffsetX;
            locShadowOffset.y = shadowOffsetY;
        }

        if (this._shadowOpacity !== shadowOpacity) {
            this._shadowOpacity = shadowOpacity;
        }
        this._renderCmd._setColorsString();

        if (this._shadowBlur !== shadowBlur)
            this._shadowBlur = shadowBlur;
        this._setUpdateTextureDirty();
    },

    _enableShadow: function (shadowColor, offset, blurRadius) {
        if (!this._shadowColor) {
            this._shadowColor = cc.color(255, 255, 255, 128);
        }
        this._shadowColor.r = shadowColor.r;
        this._shadowColor.g = shadowColor.g;
        this._shadowColor.b = shadowColor.b;

        var x, y, a, b;
        x = offset.width || offset.x || 0;
        y = offset.height || offset.y || 0;
        a = (shadowColor.a != null) ? (shadowColor.a / 255) : 0.5;
        b = blurRadius;

        this._enableShadowNoneColor(x, y, a, b);
    },

    _getShadowOffsetX: function () {
        return this._shadowOffset.x;
    },
    _setShadowOffsetX: function (x) {
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        if (this._shadowOffset.x !== x) {
            this._shadowOffset.x = x;
            this._setUpdateTextureDirty();
        }
    },

    _getShadowOffsetY: function () {
        return this._shadowOffset._y;
    },
    _setShadowOffsetY: function (y) {
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        if (this._shadowOffset._y !== y) {
            this._shadowOffset._y = y;
            this._setUpdateTextureDirty();
        }
    },

    _getShadowOffset: function () {
        return cc.p(this._shadowOffset.x, this._shadowOffset.y);
    },
    _setShadowOffset: function (offset) {
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        if (this._shadowOffset.x !== offset.x || this._shadowOffset.y !== offset.y) {
            this._shadowOffset.x = offset.x;
            this._shadowOffset.y = offset.y;
            this._setUpdateTextureDirty();
        }
    },

    _getShadowOpacity: function () {
        return this._shadowOpacity;
    },
    _setShadowOpacity: function (shadowOpacity) {
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        if (this._shadowOpacity !== shadowOpacity) {
            this._shadowOpacity = shadowOpacity;
            this._renderCmd._setColorsString();
            this._setUpdateTextureDirty();
        }
    },

    _getShadowBlur: function () {
        return this._shadowBlur;
    },
    _setShadowBlur: function (shadowBlur) {
        if (false === this._shadowEnabled)
            this._shadowEnabled = true;

        if (this._shadowBlur !== shadowBlur) {
            this._shadowBlur = shadowBlur;
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Disable shadow rendering
     */
    disableShadow: function () {
        if (this._shadowEnabled) {
            this._shadowEnabled = false;
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Enable label stroke with stroke parameters
     * @param {cc.Color} strokeColor The color of stroke
     * @param {Number} strokeSize The size of stroke
     */
    enableStroke: function (strokeColor, strokeSize) {
        if (this._strokeEnabled === false)
            this._strokeEnabled = true;

        var locStrokeColor = this._strokeColor;
        if ((locStrokeColor.r !== strokeColor.r) || (locStrokeColor.g !== strokeColor.g) || (locStrokeColor.b !== strokeColor.b)) {
            locStrokeColor.r = strokeColor.r;
            locStrokeColor.g = strokeColor.g;
            locStrokeColor.b = strokeColor.b;
            this._renderCmd._setColorsString();
        }

        if (this._strokeSize !== strokeSize)
            this._strokeSize = strokeSize || 0;
        this._setUpdateTextureDirty();
    },

    _getStrokeStyle: function () {
        return this._strokeColor;
    },
    _setStrokeStyle: function (strokeStyle) {
        if (this._strokeEnabled === false)
            this._strokeEnabled = true;

        var locStrokeColor = this._strokeColor;
        if ((locStrokeColor.r !== strokeStyle.r) || (locStrokeColor.g !== strokeStyle.g) || (locStrokeColor.b !== strokeStyle.b)) {
            locStrokeColor.r = strokeStyle.r;
            locStrokeColor.g = strokeStyle.g;
            locStrokeColor.b = strokeStyle.b;
            this._renderCmd._setColorsString();
            this._setUpdateTextureDirty();
        }
    },

    _getLineWidth: function () {
        return this._strokeSize;
    },
    _setLineWidth: function (lineWidth) {
        if (this._strokeEnabled === false)
            this._strokeEnabled = true;
        if (this._strokeSize !== lineWidth) {
            this._strokeSize = lineWidth || 0;
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Disable label stroke
     */
    disableStroke: function () {
        if (this._strokeEnabled) {
            this._strokeEnabled = false;
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Sets the text fill color
     * @function
     * @param {cc.Color} fillColor The fill color of the label
     */
    setFontFillColor: function (fillColor) {
        var locTextFillColor = this._textFillColor;
        if (locTextFillColor.r !== fillColor.r || locTextFillColor.g !== fillColor.g || locTextFillColor.b !== fillColor.b) {
            locTextFillColor.r = fillColor.r;
            locTextFillColor.g = fillColor.g;
            locTextFillColor.b = fillColor.b;
            this._renderCmd._setColorsString();
            this._needUpdateTexture = true;
        }
    },

    _getFillStyle: function () {
        return this._textFillColor;
    },

    //set the text definition for this label
    _updateWithTextDefinition: function (textDefinition, mustUpdateTexture) {
        if (textDefinition.fontDimensions) {
            this._dimensions.width = textDefinition.boundingWidth;
            this._dimensions.height = textDefinition.boundingHeight;
        } else {
            this._dimensions.width = 0;
            this._dimensions.height = 0;
        }

        this._hAlignment = textDefinition.textAlign;
        this._vAlignment = textDefinition.verticalAlign;

        this._fontName = textDefinition.fontName;
        this._fontSize = textDefinition.fontSize || 12;

        if(textDefinition.lineHeight)
            this._lineHeight = textDefinition.lineHeight
        else
            this._lineHeight = this._fontSize;

        this._renderCmd._setFontStyle(textDefinition);


        // shadow
        if (textDefinition.shadowEnabled)
            this.enableShadow(textDefinition.shadowOffsetX,
                textDefinition.shadowOffsetY,
                textDefinition.shadowOpacity,
                textDefinition.shadowBlur);

        // stroke
        if (textDefinition.strokeEnabled)
            this.enableStroke(textDefinition.strokeStyle, textDefinition.lineWidth);

        // fill color
        this.setFontFillColor(textDefinition.fillStyle);

        if (mustUpdateTexture)
            this._renderCmd._updateTexture();
        var flags = cc.Node._dirtyFlags;
        this._renderCmd.setDirtyFlag(flags.colorDirty|flags.opacityDirty|flags.textDirty);
    },

    _prepareTextDefinition: function (adjustForResolution) {
        var texDef = new cc.FontDefinition();

        if (adjustForResolution) {
            texDef.fontSize = this._fontSize;
            texDef.boundingWidth = cc.contentScaleFactor() * this._dimensions.width;
            texDef.boundingHeight = cc.contentScaleFactor() * this._dimensions.height;
        } else {
            texDef.fontSize = this._fontSize;
            texDef.boundingWidth = this._dimensions.width;
            texDef.boundingHeight = this._dimensions.height;
        }

        texDef.fontName = this._fontName;
        texDef.textAlign = this._hAlignment;
        texDef.verticalAlign = this._vAlignment;

        // stroke
        if (this._strokeEnabled) {
            texDef.strokeEnabled = true;
            var locStrokeColor = this._strokeColor;
            texDef.strokeStyle = cc.color(locStrokeColor.r, locStrokeColor.g, locStrokeColor.b);
            texDef.lineWidth = this._strokeSize;
        } else
            texDef.strokeEnabled = false;

        // shadow
        if (this._shadowEnabled) {
            texDef.shadowEnabled = true;
            texDef.shadowBlur = this._shadowBlur;
            texDef.shadowOpacity = this._shadowOpacity;

            texDef.shadowOffsetX = (adjustForResolution ? cc.contentScaleFactor() : 1) * this._shadowOffset.x;
            texDef.shadowOffsetY = (adjustForResolution ? cc.contentScaleFactor() : 1) * this._shadowOffset.y;
        } else
            texDef._shadowEnabled = false;

        // text tint
        var locTextFillColor = this._textFillColor;
        texDef.fillStyle = cc.color(locTextFillColor.r, locTextFillColor.g, locTextFillColor.b);
        return texDef;
    },

    /**
     * Changes the text content of the label
     * @warning Changing the string is as expensive as creating a new cc.LabelTTF. To obtain better performance use cc.LabelAtlas
     * @param {String} text Text content for the label
     */
    setString: function (text) {
        text = String(text);
        if (this._originalText !== text) {
            this._originalText = text + "";

            this._updateString();

            // Force update
            this._setUpdateTextureDirty();
            this._renderCmd.setDirtyFlag(cc.Node._dirtyFlags.transformDirty);
        }
    },
    _updateString: function () {
        if ((!this._string || this._string === "") && this._string !== this._originalText)
            cc.renderer.childrenOrderDirty = true;
        this._string = this._originalText;
    },

    /**
     * Sets Horizontal Alignment of cc.LabelTTF
     * @param {cc.TEXT_ALIGNMENT_LEFT|cc.TEXT_ALIGNMENT_CENTER|cc.TEXT_ALIGNMENT_RIGHT} alignment Horizontal Alignment
     */
    setHorizontalAlignment: function (alignment) {
        if (alignment !== this._hAlignment) {
            this._hAlignment = alignment;
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Sets Vertical Alignment of cc.LabelTTF
     * @param {cc.VERTICAL_TEXT_ALIGNMENT_TOP|cc.VERTICAL_TEXT_ALIGNMENT_CENTER|cc.VERTICAL_TEXT_ALIGNMENT_BOTTOM} verticalAlignment
     */
    setVerticalAlignment: function (verticalAlignment) {
        if (verticalAlignment !== this._vAlignment) {
            this._vAlignment = verticalAlignment;

            // Force update
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Set Dimensions of cc.LabelTTF, the dimension is the maximum size of the label, set it so that label will automatically change lines when necessary.
     * @param {cc.Size|Number} dim dimensions or width of dimensions
     * @param {Number} [height] height of dimensions
     */
    setDimensions: function (dim, height) {
        var width;
        if (height === undefined) {
            width = dim.width;
            height = dim.height;
        } else
            width = dim;

        if (width !== this._dimensions.width || height !== this._dimensions.height) {
            this._dimensions.width = width;
            this._dimensions.height = height;
            this._updateString();
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    _getBoundingWidth: function () {
        return this._dimensions.width;
    },
    _setBoundingWidth: function (width) {
        if (width !== this._dimensions.width) {
            this._dimensions.width = width;
            this._updateString();
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    _getBoundingHeight: function () {
        return this._dimensions.height;
    },
    _setBoundingHeight: function (height) {
        if (height !== this._dimensions.height) {
            this._dimensions.height = height;
            this._updateString();
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Sets font size of cc.LabelTTF
     * @param {Number} fontSize
     */
    setFontSize: function (fontSize) {
        if (this._fontSize !== fontSize) {
            this._fontSize = fontSize;
            this._renderCmd._setFontStyle(this._fontName, this._fontSize, this._fontStyle, this._fontWeight);
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Sets font name of cc.LabelTTF
     * @param {String} fontName
     */
    setFontName: function (fontName) {
        if (this._fontName && this._fontName !== fontName) {
            this._fontName = fontName;
            this._renderCmd._setFontStyle(this._fontName, this._fontSize, this._fontStyle, this._fontWeight);
            // Force update
            this._setUpdateTextureDirty();
        }
    },

    _getFont: function () {
        return this._renderCmd._getFontStyle();
    },
    _setFont: function (fontStyle) {
        var res = cc.LabelTTF._fontStyleRE.exec(fontStyle);
        if (res) {
            this._fontSize = parseInt(res[1]);
            this._fontName = res[2];
            this._renderCmd._setFontStyle(this._fontName, this._fontSize, this._fontStyle, this._fontWeight);

            // Force update
            this._setUpdateTextureDirty();
        }
    },

    /**
     * Returns the actual content size of the label, the content size is the real size that the label occupied while dimension is the outer bounding box of the label.
     * @returns {cc.Size} The content size
     */
    getContentSize: function () {
        if (this._needUpdateTexture)
            this._renderCmd._updateTTF();
        return cc.Sprite.prototype.getContentSize.call(this);
    },

    _getWidth: function () {
        if (this._needUpdateTexture)
            this._renderCmd._updateTTF();
        return cc.Sprite.prototype._getWidth.call(this);
    },
    _getHeight: function () {
        if (this._needUpdateTexture)
            this._renderCmd._updateTTF();
        return cc.Sprite.prototype._getHeight.call(this);
    },

    setTextureRect: function (rect, rotated, untrimmedSize) {
        //set needConvert to false
        cc.Sprite.prototype.setTextureRect.call(this, rect, rotated, untrimmedSize, false);
    },

    /**
     * set Target to draw on
     * @param boolean onCanvas
     */
    setDrawMode: function (onCacheMode) {
        this._onCacheCanvasMode = onCacheMode;
    },

    _createRenderCmd: function () {
        if (cc._renderType === cc.game.RENDER_TYPE_WEBGL)
            return new cc.LabelTTF.WebGLRenderCmd(this);
        else if (this._onCacheCanvasMode)
            return new cc.LabelTTF.CacheCanvasRenderCmd(this);
        else
            return new cc.LabelTTF.CanvasRenderCmd(this);
    },

    //For web only
    _setFontStyle: function(fontStyle){
        if (this._fontStyle !== fontStyle) {
            this._fontStyle = fontStyle;
            this._renderCmd._setFontStyle(this._fontName, this._fontSize, this._fontStyle, this._fontWeight);
            this._setUpdateTextureDirty();
        }
    },

    _getFontStyle: function(){
        return this._fontStyle;
    },

    _setFontWeight: function(fontWeight){
        if (this._fontWeight !== fontWeight) {
            this._fontWeight = fontWeight;
            this._renderCmd._setFontStyle(this._fontName, this._fontSize, this._fontStyle, this._fontWeight);
            this._setUpdateTextureDirty();
        }
    },

    _getFontWeight: function(){
        return this._fontWeight;
    }
});

cc.assert(cc.isFunction(cc._tmp.PrototypeLabelTTF), cc._LogInfos.MissingFile, "LabelTTFPropertyDefine.js");
cc._tmp.PrototypeLabelTTF();
delete cc._tmp.PrototypeLabelTTF;

// Only support style in this format: "18px Verdana" or "18px 'Helvetica Neue'"
cc.LabelTTF._fontStyleRE = /^(\d+)px\s+['"]?([\w\s\d]+)['"]?$/;

/**
 * creates a cc.LabelTTF from a font name, alignment, dimension and font size
 * @deprecated since v3.0, please use the new construction instead
 * @see cc.LabelTTF
 * @static
 * @param {String} text
 * @param {String|cc.FontDefinition} [fontName="Arial"]
 * @param {Number} [fontSize=16]
 * @param {cc.Size} [dimensions=cc.size(0,0)]
 * @param {Number} [hAlignment=cc.TEXT_ALIGNMENT_LEFT]
 * @param {Number} [vAlignment=cc.VERTICAL_TEXT_ALIGNMENT_TOP]
 * @return {cc.LabelTTF|Null}
 */
cc.LabelTTF.create = function (text, fontName, fontSize, dimensions, hAlignment, vAlignment) {
    return new cc.LabelTTF(text, fontName, fontSize, dimensions, hAlignment, vAlignment);
};

/**
 * @deprecated since v3.0, please use the new construction instead
 * @function
 * @static
 */
cc.LabelTTF.createWithFontDefinition = cc.LabelTTF.create;

if (cc.USE_LA88_LABELS)
    cc.LabelTTF._SHADER_PROGRAM = cc.SHADER_POSITION_TEXTURECOLOR;
else
    cc.LabelTTF._SHADER_PROGRAM = cc.SHADER_POSITION_TEXTUREA8COLOR;

cc.LabelTTF.__labelHeightDiv = document.createElement("div");
cc.LabelTTF.__labelHeightDiv.style.fontFamily = "Arial";
cc.LabelTTF.__labelHeightDiv.style.position = "absolute";
cc.LabelTTF.__labelHeightDiv.style.left = "-100px";
cc.LabelTTF.__labelHeightDiv.style.top = "-100px";
cc.LabelTTF.__labelHeightDiv.style.lineHeight = "normal";

document.body ?
    document.body.appendChild(cc.LabelTTF.__labelHeightDiv) :
    window.addEventListener('load', function () {
        this.removeEventListener('load', arguments.callee, false);
        document.body.appendChild(cc.LabelTTF.__labelHeightDiv);
    }, false);

cc.LabelTTF.__getFontHeightByDiv = function (fontName, fontSize) {

    if(fontName instanceof cc.FontDefinition){
        /** @type cc.FontDefinition */
        var fontDef = fontName;
        var clientHeight = cc.LabelTTF.__fontHeightCache[fontDef._getCanvasFontStr()];
        if (clientHeight > 0) return clientHeight;
        var labelDiv = cc.LabelTTF.__labelHeightDiv;
        labelDiv.innerHTML = "ajghl~!";
        labelDiv.style.fontFamily = fontDef.fontName;
        labelDiv.style.fontSize = fontDef.fontSize + "px";
        labelDiv.style.fontStyle = fontDef.fontStyle;
        labelDiv.style.fontWeight = fontDef.fontWeight;

        clientHeight = labelDiv.clientHeight;
        cc.LabelTTF.__fontHeightCache[fontDef._getCanvasFontStr()] = clientHeight;
        labelDiv.innerHTML = "";
        return clientHeight;
    }

    //Default
    var clientHeight = cc.LabelTTF.__fontHeightCache[fontName + "." + fontSize];
    if (clientHeight > 0) return clientHeight;
    var labelDiv = cc.LabelTTF.__labelHeightDiv;
    labelDiv.innerHTML = "ajghl~!";
    labelDiv.style.fontFamily = fontName;
    labelDiv.style.fontSize = fontSize + "px";
    clientHeight = labelDiv.clientHeight;
    cc.LabelTTF.__fontHeightCache[fontName + "." + fontSize] = clientHeight;
    labelDiv.innerHTML = "";
    return clientHeight;

};

cc.LabelTTF.__fontHeightCache = {};