Make D3D12Sampler implement ISampler interface

engine/include/XCEngine/RHI/D3D12/D3D12Sampler.h

@@ -3,6 +3,7 @@
 #include <d3d12.h>
 #include <wrl/client.h>
 
+#include "../DescriptorHeap.h"
 #include "D3D12Enum.h"
 
 using Microsoft::WRL::ComPtr;
@@ -10,7 +11,7 @@ using Microsoft::WRL::ComPtr;
 namespace XCEngine {
 namespace RHI {
 
-class D3D12Sampler {
+class D3D12Sampler : public ISampler {
 public:
     D3D12Sampler();
     ~D3D12Sampler();
@@ -20,6 +21,8 @@ public:
 
     D3D12_SAMPLER_DESC GetDesc() const { return m_desc; }
 
+    void* GetNativeHandle() const override { return nullptr; }
+
 private:
     D3D12_SAMPLER_DESC m_desc;
 };