Fixed a bug of cc.LabelTTF that its setColor doesn't set shadowColor on CanvasMode

Author: dingpinglv

cocos2d/core/labelttf/CCLabelTTFCanvasRenderCmd.js

@@ -412,12 +412,14 @@ cc.LabelTTF._firsrEnglish = /^[a-zA-Z0-9ÄÖÜäöüßéèçàùêâîôû]/;
         var locDisplayColor = this._displayedColor, node = this._node,
             locShadowColor = node._shadowColor || this._displayedColor;
         var locStrokeColor = node._strokeColor, locFontFillColor = node._textFillColor;
-
-        this._shadowColorStr = "rgba(" + (0 | (locShadowColor.r)) + "," + (0 | (locShadowColor.g)) + "," + (0 | (locShadowColor.b)) + "," + node._shadowOpacity + ")";
-        this._fillColorStr = "rgba(" + (0 | (locDisplayColor.r / 255 * locFontFillColor.r)) + "," + (0 | (locDisplayColor.g / 255 * locFontFillColor.g)) + ","
-            + (0 | (locDisplayColor.b / 255 * locFontFillColor.b)) + ", 1)";  //use globalOpacity  + locDisplayedOpacity / 255 + ")";
-        this._strokeColorStr = "rgba(" + (0 | (locDisplayColor.r / 255 * locStrokeColor.r)) + "," + (0 | (locDisplayColor.g / 255 * locStrokeColor.g)) + ","
-            + (0 | (locDisplayColor.b / 255 * locStrokeColor.b)) + ", 1)";   //use globalOpacity  + locDisplayedOpacity / 255 + ")";
+        var dr = locDisplayColor.r / 255, dg = locDisplayColor.g / 255, db = locDisplayColor.b / 255;
+
+        this._shadowColorStr = "rgba(" + (0 | (dr * locShadowColor.r)) + "," + (0 | ( dg * locShadowColor.g)) + ","
+            + (0 | (db * locShadowColor.b)) + "," + node._shadowOpacity + ")";
+        this._fillColorStr = "rgba(" + (0 | (dr * locFontFillColor.r)) + "," + (0 | (dg * locFontFillColor.g)) + ","
+            + (0 | (db * locFontFillColor.b)) + ", 1)";
+        this._strokeColorStr = "rgba(" + (0 | (dr * locStrokeColor.r)) + "," + (0 | (dg * locStrokeColor.g)) + ","
+            + (0 | (db * locStrokeColor.b)) + ", 1)";
     };
 
     proto._updateColor = function(){