diff --git a/inc/hgl/graph/VKCommandBuffer.h b/inc/hgl/graph/VKCommandBuffer.h
index e5d77631..db2a9a0f 100644
--- a/inc/hgl/graph/VKCommandBuffer.h
+++ b/inc/hgl/graph/VKCommandBuffer.h
@@ -48,6 +48,8 @@ class RenderCmdBuffer:public GPUCmdBuffer
     RenderPassBeginInfo rp_begin;
     VkPipelineLayout pipeline_layout;
 
+private:
+
     void SetFBO(Framebuffer *);
 
 public:
diff --git a/inc/hgl/graph/module/SwapchainModule.h b/inc/hgl/graph/module/SwapchainModule.h
index b68fa124..1e0125dc 100644
--- a/inc/hgl/graph/module/SwapchainModule.h
+++ b/inc/hgl/graph/module/SwapchainModule.h
@@ -26,6 +26,8 @@ protected:
     bool CreateSwapchain();
     bool CreateSwapchainRenderTarget();
 
+    RenderCmdBuffer *GetRenderCmdBuffer(int frame_index=-1);
+
 public:
 
     virtual void OnResize(const VkExtent2D &)override;                                              ///<窗口大小改变
@@ -40,11 +42,11 @@ public:
 
 public:
 
-            RenderPass *    GetRenderPass   ()const{return sc_render_pass;}
+            RenderPass *        GetRenderPass   ()const{return sc_render_pass;}
 
-    const   VkExtent2D &    GetSwapchainSize()const{return sc_render_target->GetExtent();}
+    const   VkExtent2D &        GetSwapchainSize()const{return sc_render_target->GetExtent();}
 
-            RenderCmdBuffer *RecordCmdBuffer(int frame_index=-1);
+            RenderCmdBuffer *   RecordCmdBuffer (int frame_index=-1);
 
 };//class SwapchainModule:public GraphModule
 
diff --git a/src/SceneGraph/module/SwapchainModule.cpp b/src/SceneGraph/module/SwapchainModule.cpp
index 3d6de680..73fbfccd 100644
--- a/src/SceneGraph/module/SwapchainModule.cpp
+++ b/src/SceneGraph/module/SwapchainModule.cpp
@@ -216,7 +216,7 @@ SwapchainModule::SwapchainModule(GPUDevice *dev,TextureManager *tm,RenderTargetM
     #ifdef _DEBUG
     {
         if(dev_attr->debug_utils)
-            dev_attr->debug_utils->SetRenderPass(sc_render_pass->GetVkRenderPass(),"MainDeviceRenderPass");
+            dev_attr->debug_utils->SetRenderPass(sc_render_pass->GetVkRenderPass(),"SwapchainRenderPass");
     }
     #endif//_DEBUG
 
@@ -244,19 +244,7 @@ bool SwapchainModule::BeginFrame()
     return(true);
 }
 
-void SwapchainModule::EndFrame()
-{
-    int index=sc_render_target->GetCurrentFrameIndices();
-
-    VkCommandBuffer cb=*(swapchain->sc_image[index].cmd_buf);
-
-    sc_render_target->Submit(cb);
-    sc_render_target->PresentBackbuffer();
-    sc_render_target->WaitQueue();
-    sc_render_target->WaitFence();
-}
-
-RenderCmdBuffer *SwapchainModule::RecordCmdBuffer(int frame_index)
+RenderCmdBuffer *SwapchainModule::GetRenderCmdBuffer(int frame_index)
 {
     if(frame_index<0)
         frame_index=sc_render_target->GetCurrentFrameIndices();
@@ -264,7 +252,28 @@ RenderCmdBuffer *SwapchainModule::RecordCmdBuffer(int frame_index)
     if(frame_index>=swapchain->image_count)
         return(nullptr);
 
-    RenderCmdBuffer *rcb=swapchain->sc_image[frame_index].cmd_buf;
+    return swapchain->sc_image[frame_index].cmd_buf;
+}
+
+void SwapchainModule::EndFrame()
+{
+    RenderCmdBuffer *rcb=GetRenderCmdBuffer();
+
+    if(!rcb)
+        return;
+
+    sc_render_target->Submit(*rcb);
+    sc_render_target->PresentBackbuffer();
+    sc_render_target->WaitQueue();
+    sc_render_target->WaitFence();
+}
+
+RenderCmdBuffer *SwapchainModule::RecordCmdBuffer(int frame_index)
+{
+    RenderCmdBuffer *rcb=GetRenderCmdBuffer(frame_index);
+
+    if(!rcb)
+        return(nullptr);
 
     rcb->Begin();
     rcb->BindFramebuffer(sc_render_pass,sc_render_target->GetFramebuffer());