refactor: 将 tests/D3D12 的 CommandList 替换为 D3D12CommandList 类

- 将全局 ID3D12GraphicsCommandList 替换为 D3D12CommandList
- 更新初始化、Reset、Close 调用
- 修复 Initialize 中不应调用 Close() 的问题
- 测试通过，截图与 GT.ppm 完全匹配

D3D12_engine_log.txt

@@ -1,2 +1,8 @@
 [2026-03-15 17:36:10] [DEBUG] [Rendering] [DEBUG] D3D12 Test Application Started
 
+[2026-03-15 17:52:42] [DEBUG] [Rendering] [DEBUG] D3D12 Test Application Started
+
+[2026-03-15 17:52:53] [DEBUG] [Rendering] [DEBUG] D3D12 Test Application Started
+
+[2026-03-15 17:57:07] [DEBUG] [Rendering] [DEBUG] D3D12 Test Application Started
+

engine/include/XCEngine/RHI/D3D12/D3D12CommandList.h

@@ -41,7 +41,7 @@ public:
     D3D12CommandList();
     ~D3D12CommandList();
 
-    bool Initialize(ID3D12Device* device, CommandQueueType type = CommandQueueType::Direct);
+    bool Initialize(ID3D12Device* device, CommandQueueType type = CommandQueueType::Direct, ID3D12CommandAllocator* allocator = nullptr);
     void Shutdown();
 
     void Reset(ID3D12CommandAllocator* allocator);

engine/src/RHI/D3D12CommandList.cpp

@@ -15,23 +15,13 @@ D3D12CommandList::~D3D12CommandList() {
     Shutdown();
 }
 
-bool D3D12CommandList::Initialize(ID3D12Device* device, CommandQueueType type) {
+bool D3D12CommandList::Initialize(ID3D12Device* device, CommandQueueType type, ID3D12CommandAllocator* allocator) {
     D3D12_COMMAND_LIST_TYPE listType = ToD3D12(type);
 
-    ComPtr<ID3D12CommandAllocator> tempAllocator;
-    HRESULT hResult = device->CreateCommandAllocator(
-        listType,
-        IID_PPV_ARGS(&tempAllocator)
-    );
-
-    if (FAILED(hResult)) {
-        return false;
-    }
-
-    hResult = device->CreateCommandList(
+    HRESULT hResult = device->CreateCommandList(
         0,
         listType,
-        tempAllocator.Get(),
+        allocator,
         nullptr,
         IID_PPV_ARGS(&m_commandList)
     );
@@ -42,7 +32,6 @@ bool D3D12CommandList::Initialize(ID3D12Device* device, CommandQueueType type) {
 
     m_type = type;
 
-    m_commandList->Close();
     return true;
 }
 

tests/D3D12/main.cpp

@@ -17,6 +17,7 @@
 #include "XCEngine/RHI/D3D12/D3D12Device.h"
 #include "XCEngine/RHI/D3D12/D3D12CommandQueue.h"
 #include "XCEngine/RHI/D3D12/D3D12CommandAllocator.h"
+#include "XCEngine/RHI/D3D12/D3D12CommandList.h"
 #include "XCEngine/RHI/D3D12/D3D12Fence.h"
 #include "XCEngine/RHI/D3D12/D3D12Screenshot.h"
 #include "XCEngine/Debug/Logger.h"
@@ -61,7 +62,7 @@ UINT gDSVDescriptorSize = 0;
 
 // 命令相关
 XCEngine::RHI::D3D12CommandAllocator gCommandAllocator;
-ID3D12GraphicsCommandList* gCommandList = nullptr;
+XCEngine::RHI::D3D12CommandList gCommandList;
 
 // 同步对象
 XCEngine::RHI::D3D12Fence gFence;
@@ -660,7 +661,7 @@ bool InitD3D12(HWND inHWND, int inWidth, int inHeight) {
 	device->CreateDepthStencilView(gDSRT, &d3dDSViewDesc, gSwapChainDSVHeap->GetCPUDescriptorHandleForHeapStart());
 
 	gCommandAllocator.Initialize(device, XCEngine::RHI::CommandQueueType::Direct);
-	device->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, gCommandAllocator.GetCommandAllocator(), nullptr, IID_PPV_ARGS(&gCommandList));
+	gCommandList.Initialize(device, XCEngine::RHI::CommandQueueType::Direct, gCommandAllocator.GetCommandAllocator());
 
 	gFence.Initialize(device, 0);
 
@@ -675,7 +676,7 @@ ID3D12CommandAllocator* GetCommandAllocator() {
 }
 
 ID3D12GraphicsCommandList* GetCommandList() {
-	return gCommandList;
+	return gCommandList.GetCommandList();
 }
 
 void WaitForCompletionOfCommandList() {
@@ -694,8 +695,8 @@ void WaitForCompletionOfCommandList() {
 // 关闭CommandList → ExecuteCommandLists → Signal Fence
 //=================================================================================
 void EndCommandList() {
-	gCommandList->Close();
-	ID3D12CommandList* ppCommandLists[] = { gCommandList };
+	gCommandList.Close();
+	ID3D12CommandList* ppCommandLists[] = { gCommandList.GetCommandList() };
 	gCommandQueue.ExecuteCommandLists(1, ppCommandLists);
 	gFenceValue += 1;
 	gCommandQueue.Signal(gFence.GetFence(), gFenceValue);
@@ -942,7 +943,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 			float timeSinceAppStartInSecond = float(timeSinceAppStartInMS) / 1000.0f;
 			color[0] = timeSinceAppStartInSecond;
 			commandAllocator->Reset();
-			commandList->Reset(commandAllocator, nullptr);
+			gCommandList.Reset(gCommandAllocator.GetCommandAllocator());
 			BeginRenderToSwapChain(commandList);
 			commandList->SetPipelineState(pso);
 			commandList->SetGraphicsRootSignature(rootSignature);