diff --git a/inc/hgl/graph/VK.h b/inc/hgl/graph/VK.h
index 61e1f7c8..007ad7ba 100644
--- a/inc/hgl/graph/VK.h
+++ b/inc/hgl/graph/VK.h
@@ -70,6 +70,7 @@ class TileData;
 class DeviceMemory;
 class DeviceBuffer;
 struct DeviceBufferData;
+template<typename T> class DeviceBufferMap;
 
 struct PrimitiveDataBuffer;
 struct PrimitiveRenderData;
diff --git a/inc/hgl/graph/VKBuffer.h b/inc/hgl/graph/VKBuffer.h
index 81aca0f8..9b02275d 100644
--- a/inc/hgl/graph/VKBuffer.h
+++ b/inc/hgl/graph/VKBuffer.h
@@ -51,4 +51,39 @@ public:
             bool    Write   (const void *ptr)                               {return buf.memory->Write(ptr);}
 };//class DeviceBuffer
 
+template<typename T> class DeviceBufferMap
+{
+    DeviceBuffer *dev_buf;
+    T data_map;
+
+public:
+
+    static const VkDeviceSize GetSize()
+    {
+        return sizeof(T);
+    }
+
+public:
+
+    DeviceBufferMap(DeviceBuffer *buf)
+    {
+        dev_buf=buf;
+    }
+
+    virtual ~DeviceBufferMap()
+    {
+        delete dev_buf;
+    }
+
+    operator DeviceBuffer *(){return dev_buf;}
+
+    T *data(){return &data_map;}
+
+    void Update()
+    {
+        if(dev_buf)
+            dev_buf->Write(&data_map,sizeof(T));
+    }
+};
+
 VK_NAMESPACE_END
diff --git a/inc/hgl/graph/VKDevice.h b/inc/hgl/graph/VKDevice.h
index 2cc3f6be..5a8e5c5b 100644
--- a/inc/hgl/graph/VKDevice.h
+++ b/inc/hgl/graph/VKDevice.h
@@ -126,6 +126,17 @@ public: //Buffer相关
 
 #undef CREATE_BUFFER_OBJECT
 
+    template<typename T>
+    T *CreateUBO()
+    {
+        DeviceBuffer *buf=CreateUBO(T::GetSize());
+
+        if(!buf)
+            return(nullptr);
+
+        return(new T(buf));
+    }
+
     GPUArrayBuffer *CreateArrayInUBO(const VkDeviceSize &uint_size);
     GPUArrayBuffer *CreateArrayInSSBO(const VkDeviceSize &uint_size);
 
diff --git a/inc/hgl/graph/VKRenderTarget.h b/inc/hgl/graph/VKRenderTarget.h
index cbd8c88e..0ca4d9df 100644
--- a/inc/hgl/graph/VKRenderTarget.h
+++ b/inc/hgl/graph/VKRenderTarget.h
@@ -14,6 +14,8 @@ VK_NAMESPACE_BEGIN
 
 class RenderFramework;
 
+using UBOViewportInfo=DeviceBufferMap<graph::ViewportInfo>;
+
 /**
 * RenderTarget 存在几种情况：
 * 
@@ -29,8 +31,8 @@ class IRenderTarget
     RenderFramework *render_framework;
 
     VkExtent2D extent;
-    graph::ViewportInfo vp_info;
-    graph::DeviceBuffer *ubo_vp_info;
+
+    UBOViewportInfo *ubo_vp_info;
 
     DescriptorBinding desc_binding;
 
diff --git a/src/SceneGraph/Vulkan/VKRenderTarget.cpp b/src/SceneGraph/Vulkan/VKRenderTarget.cpp
index e6ed57af..b00dc512 100644
--- a/src/SceneGraph/Vulkan/VKRenderTarget.cpp
+++ b/src/SceneGraph/Vulkan/VKRenderTarget.cpp
@@ -16,9 +16,9 @@ IRenderTarget::IRenderTarget(RenderFramework *rf,const VkExtent2D &ext):desc_bin
 {
     render_framework=rf;
 
-    ubo_vp_info=GetDevice()->CreateUBO(sizeof(ViewportInfo),&vp_info);
+    ubo_vp_info=GetDevice()->CreateUBO<UBOViewportInfo>();
 
-    desc_binding.AddUBO(mtl::SBS_ViewportInfo.name,ubo_vp_info);
+    desc_binding.AddUBO(mtl::SBS_ViewportInfo.name,*ubo_vp_info);
 
     OnResize(ext);
 }
@@ -31,8 +31,10 @@ IRenderTarget::~IRenderTarget()
 void IRenderTarget::OnResize(const VkExtent2D &ext)
 {
     extent=ext;
-    vp_info.Set(ext.width,ext.height);
-    ubo_vp_info->Write(&vp_info);
+
+    ubo_vp_info->data()->Set(ext.width,ext.height);
+
+    ubo_vp_info->Update();
 }
 
 void RenderTargetData::Clear()