feat: 修复RHI渲染循环问题

- 修复RootSignature参数数量与HelloEarth一致
- 修复StaticMeshComponent中device为nullptr的问题
- 修复CommandList::Reset类型转换问题
- 修复RTV创建使用nullptr而不是rtvDesc
- 添加SwapChain的GetCurrentRenderTarget方法
- 修复DepthStencil创建问题(暂时跳过)
- 渲染循环基本可运行

MVS/XCEngineDemo/main.cpp

@@ -14,6 +14,8 @@
 #pragma comment(lib,"d3dcompiler.lib")
 #pragma comment(lib,"winmm.lib")
 
+void EngineLog(const char* msg, ...);
+
 using namespace XCEngine;
 using namespace XCEngine::RHI;
 
@@ -178,12 +180,15 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hInstancePrev, LPWSTR lpCmdLi
         return -1;
     }
     printf("PipelineState created\n");
+    EngineLog("After PSO created");
     
     IConstantBuffer* cb = nullptr;
     if (!CreateConstantBuffer(device, 65536, &cb)) {
         printf("CreateConstantBuffer Failed!\n");
         return -1;
     }
+    printf("ConstantBuffer created\n");
+    EngineLog("After CreateConstantBuffer");
     
     float matrices[64] = {};
     matrices[0] = 1.0f; matrices[5] = 1.0f; matrices[10] = 1.0f; matrices[15] = 1.0f;
@@ -191,17 +196,28 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hInstancePrev, LPWSTR lpCmdLi
     matrices[32] = 1.0f; matrices[37] = 1.0f; matrices[42] = 1.0f; matrices[47] = 1.0f;
     matrices[48] = 1.0f; matrices[53] = 1.0f; matrices[58] = 1.0f; matrices[63] = 1.0f;
     UpdateConstantBuffer(cb, matrices, sizeof(matrices));
+    printf("ConstantBuffer updated\n");
+    EngineLog("After UpdateConstantBuffer");
     
     StaticMeshComponent mesh;
+    printf("Starting mesh init...\n");
+    EngineLog("Before mesh.Initialize");
     if (!mesh.Initialize(cmdList, "Res/Model/Sphere.lhsm")) {
         printf("Load Mesh Failed!\n");
         return -1;
     }
+    printf("Mesh loaded\n");
+    EngineLog("After mesh.Initialize");
     
     cmdList->Close();
+    printf("CommandList closed\n");
+    EngineLog("After cmdList->Close");
+    
     ICommandQueue* queue = device->GetCommandQueue();
     void* cmdListPtr = cmdList->GetNativeCommandList();
     queue->ExecuteCommandLists(&cmdListPtr, 1);
+    printf("Commands executed\n");
+    EngineLog("After ExecuteCommandLists");
     
     ShowWindow(hwnd, nShowCmd);
     UpdateWindow(hwnd);
@@ -213,7 +229,9 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hInstancePrev, LPWSTR lpCmdLi
             TranslateMessage(&msg);
             DispatchMessage(&msg);
         } else {
+            EngineLog("MainLoop: 1");
             renderContext.BeginFrame();
+            EngineLog("MainLoop: 2");
             
             renderContext.SetViewport((float)width, (float)height);
             renderContext.SetScissor(width, height);
@@ -221,15 +239,22 @@ int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hInstancePrev, LPWSTR lpCmdLi
             float color[4] = {0.5f, 0.5f, 0.5f, 1.0f};
             renderContext.ClearRenderTarget(color);
             renderContext.ClearDepthStencil();
+            EngineLog("MainLoop: 2e");
             
             cmdList->SetPipelineState(pso);
+            EngineLog("MainLoop: 2f - SetRootSignature");
             cmdList->SetRootSignature(rootSignature);
+            EngineLog("MainLoop: 2g - SetPrimitiveTopology");
             cmdList->SetPrimitiveTopology(PrimitiveTopology::TriangleList);
             
+            EngineLog("MainLoop: 3 - before mesh.Render");
             mesh.Render(cmdList);
+            EngineLog("MainLoop: 4");
             
             renderContext.EndFrame();
+            EngineLog("MainLoop: 5");
             renderContext.Present();
+            EngineLog("MainLoop: 6");
         }
     }