added VKBufferMap.cpp/.h

inc/hgl/graph/VKBufferMap.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include<hgl/graph/VK.h>
+#include<hgl/graph/VertexAttribDataAccess.h>
+
+VK_NAMESPACE_BEGIN
+class VKBufferMap
+{
+protected:
+
+    DeviceBuffer *buffer;
+    VkDeviceSize offset;
+    VkDeviceSize size;
+
+    void *map_ptr;
+
+public:
+
+    VKBufferMap(DeviceBuffer *buf_ptr,VkDeviceSize off,VkDeviceSize s);
+    virtual ~VKBufferMap();
+
+    const bool IsValid()const{ return buffer; }
+
+    void *Map();
+    void Unmap();
+};//class VKBufferMap
+VK_NAMESPACE_END