feat: 实现 D3D12Sampler 采样器类

- 添加 D3D12Sampler.h/cpp
- 支持采样器描述符
- 测试通过

engine/CMakeLists.txt

@@ -91,6 +91,7 @@ add_library(XCEngine STATIC
     include/XCEngine/RHI/D3D12/D3D12DescriptorHeap.h
     include/XCEngine/RHI/D3D12/D3D12Buffer.h
     include/XCEngine/RHI/D3D12/D3D12PipelineState.h
+    include/XCEngine/RHI/D3D12/D3D12Sampler.h
     include/XCEngine/RHI/D3D12/D3D12Texture.h
     include/XCEngine/RHI/D3D12/D3D12RootSignature.h
     include/XCEngine/RHI/D3D12/D3D12SwapChain.h
@@ -103,6 +104,7 @@ add_library(XCEngine STATIC
     src/RHI/D3D12DescriptorHeap.cpp
     src/RHI/D3D12Buffer.cpp
     src/RHI/D3D12PipelineState.cpp
+    src/RHI/D3D12Sampler.cpp
     src/RHI/D3D12Texture.cpp
     src/RHI/D3D12RootSignature.cpp
     src/RHI/D3D12SwapChain.cpp

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

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <d3d12.h>
+#include <wrl/client.h>
+
+#include "D3D12Enum.h"
+
+using Microsoft::WRL::ComPtr;
+
+namespace XCEngine {
+namespace RHI {
+
+class D3D12Sampler {
+public:
+    D3D12Sampler();
+    ~D3D12Sampler();
+
+    bool Initialize(ID3D12Device* device, const D3D12_SAMPLER_DESC& desc);
+    void Shutdown();
+
+    D3D12_SAMPLER_DESC GetDesc() const { return m_desc; }
+
+private:
+    D3D12_SAMPLER_DESC m_desc;
+};
+
+} // namespace RHI
+} // namespace XCEngine

engine/src/RHI/D3D12Sampler.cpp

@@ -0,0 +1,24 @@
+#include "XCEngine/RHI/D3D12/D3D12Sampler.h"
+
+namespace XCEngine {
+namespace RHI {
+
+D3D12Sampler::D3D12Sampler() {
+    memset(&m_desc, 0, sizeof(D3D12_SAMPLER_DESC));
+}
+
+D3D12Sampler::~D3D12Sampler() {
+    Shutdown();
+}
+
+bool D3D12Sampler::Initialize(ID3D12Device* device, const D3D12_SAMPLER_DESC& desc) {
+    m_desc = desc;
+    return true;
+}
+
+void D3D12Sampler::Shutdown() {
+    memset(&m_desc, 0, sizeof(D3D12_SAMPLER_DESC));
+}
+
+} // namespace RHI
+} // namespace XCEngine