Merge pull request cocos2d#12863 from fusijie/fix_polygonsprite_setColor

fix polygon sprite setColor, setOpacity, setTexture, setTextureRect.

cocos/2d/CCSprite.cpp

@@ -265,7 +265,6 @@ bool Sprite::initWithTexture(Texture2D *texture, const Rect& rect, bool rotated)
         setTexture(texture);
         setTextureRect(rect, rotated, rect.size);
 
-        _polyInfo.setQuad(&_quad);
         // by default use "Self Render".
         // if the sprite is added to a batchnode, then it will automatically switch to "batchnode Render"
         setBatchNode(nullptr);
@@ -424,6 +423,8 @@ void Sprite::setTextureRect(const Rect& rect, bool rotated, const Size& untrimme
         _quad.tl.vertices.set(x1, y2, 0.0f);
         _quad.tr.vertices.set(x2, y2, 0.0f);
     }
+
+    _polyInfo.setQuad(&_quad);
 }
 
 void Sprite::debugDraw(bool on)
@@ -943,10 +944,9 @@ void Sprite::updateColor(void)
         color4.b *= _displayedOpacity/255.0f;
     }
 
-    _quad.bl.colors = color4;
-    _quad.br.colors = color4;
-    _quad.tl.colors = color4;
-    _quad.tr.colors = color4;
+    for (ssize_t i = 0; i < _polyInfo.triangles.vertCount; i++) {
+        _polyInfo.triangles.verts[i].colors = color4;
+    }
 
     // renders using batch node
     if (_batchNode)