diff --git a/example/Vulkan/VulkanAppFramework.h b/example/Vulkan/VulkanAppFramework.h
index 90050705..3a25867c 100644
--- a/example/Vulkan/VulkanAppFramework.h
+++ b/example/Vulkan/VulkanAppFramework.h
@@ -30,12 +30,6 @@ private:
             Window *            win             =nullptr;
     vulkan::Instance *          inst            =nullptr;
 
-    void OnResize(int w,int h)
-    {
-        InitCommandBuffer();
-        Resize(w,h);
-    }
-
     void OnKeyDown  (KeyboardButton kb){key_status[kb]=true;}
     void OnKeyUp    (KeyboardButton kb){key_status[kb]=false;}
     void OnKeyPress (KeyboardButton kb){KeyPress(kb);}
@@ -60,7 +54,7 @@ protected:
 
     vulkan::ShaderModuleManage *    shader_manage   =nullptr;
 
-private:
+protected:
 
             uint32_t                swap_chain_count=0;
 
@@ -115,7 +109,6 @@ public:
         if(!device)
             return(false);
 
-        sc_render_target=device->GetSwapchainRT();
         present_complete_semaphore  =device->CreateSem();
         render_complete_semaphore   =device->CreateSem();
 
@@ -143,11 +136,19 @@ public:
     virtual void MouseUp(uint){}
     virtual void MouseMove(){}
     virtual void MouseWheel(int,int,uint){}
+    
+    void OnResize(int w,int h)
+    {
+        InitCommandBuffer();
+        Resize(w,h);
+    }
 
     void InitCommandBuffer()
     {
         if(cmd_buf)
             SAFE_CLEAR_OBJECT_ARRAY(cmd_buf,swap_chain_count);
+            
+        sc_render_target=device->GetSwapchainRT();
 
         swap_chain_count=sc_render_target->GetImageCount();
         {
diff --git a/src/RenderDevice/Vulkan/VKDevice.cpp b/src/RenderDevice/Vulkan/VKDevice.cpp
index 88a462fe..b7c69049 100644
--- a/src/RenderDevice/Vulkan/VKDevice.cpp
+++ b/src/RenderDevice/Vulkan/VKDevice.cpp
@@ -44,6 +44,7 @@ bool Device::Resize(const VkExtent2D &extent)
     SAFE_CLEAR(textureSQ);
     SAFE_CLEAR(texture_cmd_buf);
 
+    attr->Refresh();
     swapchain=CreateSwapchain(attr,extent);
 
     texture_cmd_buf=CreateCommandBuffer(extent,0);
diff --git a/src/RenderDevice/Vulkan/VKSwapchain.cpp b/src/RenderDevice/Vulkan/VKSwapchain.cpp
index b9009124..8d4bb3a2 100644
--- a/src/RenderDevice/Vulkan/VKSwapchain.cpp
+++ b/src/RenderDevice/Vulkan/VKSwapchain.cpp
@@ -21,19 +21,12 @@ namespace
 {
     VkExtent2D SwapchainExtentClamp(const VkSurfaceCapabilitiesKHR &surface_caps,const VkExtent2D &acquire_extent)
     {
-        if(surface_caps.currentExtent.width==UINT32_MAX)
-        {
-            VkExtent2D swapchain_extent;
+        VkExtent2D swapchain_extent;
 
-            swapchain_extent.width  =hgl_clamp(acquire_extent.width,    surface_caps.minImageExtent.width,  surface_caps.maxImageExtent.width   );
-            swapchain_extent.height =hgl_clamp(acquire_extent.height,   surface_caps.minImageExtent.height, surface_caps.maxImageExtent.height  );
+        swapchain_extent.width  =hgl_clamp(acquire_extent.width,    surface_caps.minImageExtent.width,  surface_caps.maxImageExtent.width   );
+        swapchain_extent.height =hgl_clamp(acquire_extent.height,   surface_caps.minImageExtent.height, surface_caps.maxImageExtent.height  );
 
-            return swapchain_extent;
-        }
-        else
-        {
-            return surface_caps.currentExtent;
-        }
+        return swapchain_extent;
     }
     
     VkSwapchainKHR CreateSwapChain(const DeviceAttribute *dev_attr,const VkExtent2D &extent)