Make D3D12RootSignature implement IRootSignature interface

engine/include/XCEngine/RHI/D3D12/D3D12RootSignature.h

@@ -4,6 +4,7 @@
 #include <wrl/client.h>
 
 #include "../Enums.h"
+#include "../DescriptorHeap.h"
 #include "D3D12Enum.h"
 
 using Microsoft::WRL::ComPtr;
@@ -11,7 +12,7 @@ using Microsoft::WRL::ComPtr;
 namespace XCEngine {
 namespace RHI {
 
-class D3D12RootSignature {
+class D3D12RootSignature : public IRootSignature {
 public:
     D3D12RootSignature();
     ~D3D12RootSignature();
@@ -21,8 +22,12 @@ public:
 
     ID3D12RootSignature* GetRootSignature() const { return m_rootSignature.Get(); }
 
+    void* GetNativeHandle() const override { return m_rootSignature.Get(); }
+    uint32_t GetParameterCount() const override { return m_parameterCount; }
+
 private:
     ComPtr<ID3D12RootSignature> m_rootSignature;
+    uint32_t m_parameterCount = 0;
 };
 
 } // namespace RHI

engine/src/RHI/D3D12/D3D12RootSignature.cpp

@@ -30,6 +30,8 @@ bool D3D12RootSignature::Initialize(ID3D12Device* device, const D3D12_ROOT_SIGNA
         return false;
     }
 
+    m_parameterCount = desc.NumParameters;
+
     return true;
 }