1. add assert condition of rendering when adding command

2. fix bug: renderTexture->SpriteRenderTextureBug

cocos/2d/renderer/CCRenderer.cpp

@@ -102,6 +102,7 @@ Renderer::Renderer()
 :_lastMaterialID(0)
 ,_numQuads(0)
 ,_glViewAssigned(false)
+,_isRendering(false)
 #if CC_ENABLE_CACHE_TEXTURE_DATA
 ,_cacheTextureListener(nullptr)
 #endif
@@ -236,6 +237,7 @@ void Renderer::addCommand(RenderCommand* command)
 
 void Renderer::addCommand(RenderCommand* command, int renderQueue)
 {
+    CCASSERT(!_isRendering, "Cannot add command while rendering");
     CCASSERT(renderQueue >=0, "Invalid render queue");
     CCASSERT(command->getType() != RenderCommand::Type::UNKNOWN_COMMAND, "Invalid Command Type");
     _renderGroups[renderQueue].push_back(command);
@@ -243,11 +245,13 @@ void Renderer::addCommand(RenderCommand* command, int renderQueue)
 
 void Renderer::pushGroup(int renderQueueID)
 {
+    CCASSERT(!_isRendering, "Cannot add command while rendering");
     _commandGroupStack.push(renderQueueID);
 }
 
 void Renderer::popGroup()
 {
+    CCASSERT(!_isRendering, "Cannot add command while rendering");
     _commandGroupStack.pop();
 }
 
@@ -317,7 +321,8 @@ void Renderer::render()
     //glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 
     //TODO setup camera or MVP
-
+    _isRendering = true;
+    
     if (_glViewAssigned)
     {
         // cleanup
@@ -333,6 +338,7 @@ void Renderer::render()
         flush();
     }
     clean();
+    _isRendering = false;
 }
 
 void Renderer::clean()

cocos/2d/renderer/CCRenderer.h

@@ -148,6 +148,8 @@ protected:
     // stats
     ssize_t _drawnBatches;
     ssize_t _drawnVertices;
+    //flags to indicate rendering
+    bool _isRendering;
     
 #if CC_ENABLE_CACHE_TEXTURE_DATA
     EventListenerCustom* _cacheTextureListener;

tests/cpp-tests/Classes/RenderTextureTest/RenderTextureTest.cpp

@@ -670,6 +670,10 @@ std::string RenderTextureTargetNode::subtitle() const
 // SpriteRenderTextureBug
 
 SpriteRenderTextureBug::SimpleSprite::SimpleSprite() : _rt(nullptr) {}
+SpriteRenderTextureBug::SimpleSprite::~SimpleSprite()
+{
+    CC_SAFE_RELEASE(_rt);
+}
 
 SpriteRenderTextureBug::SimpleSprite* SpriteRenderTextureBug::SimpleSprite::create(const char* filename, const Rect &rect)
 {
@@ -687,16 +691,6 @@ SpriteRenderTextureBug::SimpleSprite* SpriteRenderTextureBug::SimpleSprite::crea
 }
 
 void SpriteRenderTextureBug::SimpleSprite::draw(Renderer *renderer, const kmMat4 &transform, bool transformUpdated)
-{
-    _customCommand.init(_globalZOrder);
-    _customCommand.func = CC_CALLBACK_0(SpriteRenderTextureBug::SimpleSprite::onBeforeDraw, this);
-    renderer->addCommand(&_customCommand);
-
-    Sprite::draw(renderer, transform, transformUpdated);
-    
-}
-
-void SpriteRenderTextureBug::SimpleSprite::onBeforeDraw()
 {
     if (_rt == nullptr)
     {
@@ -706,6 +700,9 @@ void SpriteRenderTextureBug::SimpleSprite::onBeforeDraw()
 	}
 	_rt->beginWithClear(0.0f, 0.0f, 0.0f, 1.0f);
 	_rt->end();
+
+    Sprite::draw(renderer, transform, transformUpdated);
+    
 }
 
 SpriteRenderTextureBug::SpriteRenderTextureBug()

tests/cpp-tests/Classes/RenderTextureTest/RenderTextureTest.h

@@ -139,14 +139,10 @@ public:
     public:
         static SimpleSprite* create(const char* filename, const Rect &rect);
         SimpleSprite();
+        ~SimpleSprite();
         virtual void draw(Renderer *renderer, const kmMat4 &transform, bool transformUpdated);
-        
-    protected:
-        void onBeforeDraw();
     public:
         RenderTexture *_rt;
-    protected:
-        CustomCommand _customCommand;
     };
         
 public: