D3D12: Fix Quad test screenshot and update texture

- Fix SetGraphicsRootDescriptorTable call order (SetRootSignature before SetPipelineState)
- Rename texture earth_d.jpg -> earth.png
- Fix vertex order for TriangleStrip quad rendering
- Add integration test README
- Add debug logging to D3D12Screenshot
- Remove obsolete run.bat

engine/src/RHI/D3D12/D3D12Screenshot.cpp

@@ -4,6 +4,7 @@
 #include "RHI/D3D12/D3D12Texture.h"
 #include "Debug/Logger.h"
 #include <d3d12.h>
+#include <dxgi.h>
 #include <stdio.h>
 
 namespace XCEngine {
@@ -65,6 +66,13 @@ bool D3D12Screenshot::CopyToReadbackAndSave(ID3D12Device* device,
     ID3D12CommandAllocator* cmdAlloc = nullptr;
     HRESULT hr = device->CreateCommandAllocator(D3D12_COMMAND_LIST_TYPE_DIRECT, IID_PPV_ARGS(&cmdAlloc));
     if (FAILED(hr)) {
+        XCEngine::Debug::Logger::Get().Error(XCEngine::Debug::LogCategory::Rendering, "Screenshot: CreateCommandAllocator failed");
+        if (hr == DXGI_ERROR_DEVICE_REMOVED) {
+            HRESULT removedReason = device->GetDeviceRemovedReason();
+            char reasonMsg[256];
+            sprintf_s(reasonMsg, sizeof(reasonMsg), "Screenshot: Device removed reason: 0x%X", removedReason);
+            XCEngine::Debug::Logger::Get().Error(XCEngine::Debug::LogCategory::Rendering, reasonMsg);
+        }
         return false;
     }
 
@@ -93,6 +101,7 @@ bool D3D12Screenshot::CopyToReadbackAndSave(ID3D12Device* device,
         IID_PPV_ARGS(&readbackBuffer));
 
     if (FAILED(hr)) {
+        XCEngine::Debug::Logger::Get().Error(XCEngine::Debug::LogCategory::Rendering, "Screenshot: CreateCommittedResource failed");
         cmdAlloc->Release();
         return false;
     }
@@ -100,6 +109,7 @@ bool D3D12Screenshot::CopyToReadbackAndSave(ID3D12Device* device,
     ID3D12GraphicsCommandList* cmdList = nullptr;
     hr = device->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_DIRECT, cmdAlloc, nullptr, IID_PPV_ARGS(&cmdList));
     if (FAILED(hr)) {
+        XCEngine::Debug::Logger::Get().Error(XCEngine::Debug::LogCategory::Rendering, "Screenshot: CreateCommandList failed");
         cmdAlloc->Release();
         readbackBuffer->Release();
         return false;
@@ -140,11 +150,21 @@ bool D3D12Screenshot::CopyToReadbackAndSave(ID3D12Device* device,
     cmdList->Close();
     ID3D12CommandList* ppCmdLists[] = { cmdList };
     commandQueue->ExecuteCommandLists(1, ppCmdLists);
+    XCEngine::Debug::Logger::Get().Info(XCEngine::Debug::LogCategory::Rendering, "Screenshot: ExecuteCommandLists done, waiting for fence...");
 
     HANDLE fenceEvent = CreateEvent(nullptr, FALSE, FALSE, nullptr);
     ID3D12Fence* fence = nullptr;
     hr = device->CreateFence(0, D3D12_FENCE_FLAG_NONE, IID_PPV_ARGS(&fence));
-    if (SUCCEEDED(hr)) {
+    if (FAILED(hr)) {
+        XCEngine::Debug::Logger::Get().Error(XCEngine::Debug::LogCategory::Rendering, "Screenshot: CreateFence failed");
+        cmdList->Release();
+        cmdAlloc->Release();
+        readbackBuffer->Release();
+        CloseHandle(fenceEvent);
+        return false;
+    }
+    XCEngine::Debug::Logger::Get().Info(XCEngine::Debug::LogCategory::Rendering, "Screenshot: Fence created, waiting...");
+    {
         UINT64 fenceValue = 1;
         commandQueue->Signal(fence, fenceValue);
         if (fence->GetCompletedValue() < fenceValue) {

tests/RHI/D3D12/integration/CMakeLists.txt

@@ -8,4 +8,5 @@ enable_testing()
 
 add_subdirectory(minimal)
 add_subdirectory(triangle)
+add_subdirectory(quad)
 add_subdirectory(render_model)

tests/RHI/D3D12/integration/README.md

@@ -0,0 +1,36 @@
+# D3D12 Integration Tests
+
+## minimal
+**后端**: D3D12Device, DXGIFactory, CommandQueue, CommandList, SwapChain
+**内容**: 最小 D3D12 初始化流程，创建窗口和交换链，无渲染输出
+
+---
+
+## triangle
+**后端**: D3D12Device, DXGIFactory, CommandQueue, CommandList, SwapChain, Buffer, Shader, RootSignature, PipelineState, RenderTargetView, DepthStencilView, Screenshot
+**内容**: 
+- 基础三角形渲染
+- 顶点 buffer 上传
+- HLSL shader 编译 (vs_5_1, ps_5_1)
+- Root signature + PSO 创建
+- RenderTarget 切换 (Present ↔ RenderTarget)
+- 截图功能验证
+
+---
+
+## quad
+**后端**: triangle 的全部 + Texture, DescriptorHeap, ShaderResourceView
+**内容**:
+- 四边形纹理采样渲染
+- Texture 加载与初始化 (stb_image)
+- DescriptorHeap (CBV_SRV_UAV) + SRV 创建
+- 静态采样器配置
+- Root signature descriptor table
+- SetDescriptorHeaps + SetGraphicsRootDescriptorTable
+- 截图功能验证
+
+---
+
+## render_model
+**后端**: (TODO)
+**内容**: 模型渲染 (待实现)

tests/RHI/D3D12/integration/quad/main.cpp

@@ -95,8 +95,6 @@ bool LoadTexture(const char* filename, D3D12Texture& texture, D3D12ShaderResourc
         return false;
     }
 
-    Log("[INFO] Loaded texture %s: %dx%d", filename, width, height);
-
     allocator.Reset();
     commandList->Reset(allocator.GetCommandAllocator(), nullptr);
 
@@ -112,9 +110,8 @@ bool LoadTexture(const char* filename, D3D12Texture& texture, D3D12ShaderResourc
     queue.WaitForIdle();
 
     texture.SetName(filename);
-    stbi_image_free(pixels);
 
-    srvHeap.Initialize(device, DescriptorHeapType::CBV_SRV_UAV, 1);
+    srvHeap.Initialize(device, DescriptorHeapType::CBV_SRV_UAV, 1, true);
     D3D12_SHADER_RESOURCE_VIEW_DESC srvDesc = D3D12ShaderResourceView::CreateDesc(Format::R8G8B8A8_UNorm, D3D12_SRV_DIMENSION_TEXTURE2D);
     srv.InitializeAt(device, texture.GetResource(), srvHeap.GetCPUDescriptorHandleForHeapStart(), &srvDesc);
 
@@ -263,8 +260,8 @@ bool InitD3D12() {
     Vertex vertices[] = {
         { { -0.5f, -0.5f, 0.0f, 1.0f }, { 0.0f, 1.0f, 0.0f, 0.0f } },
         { { -0.5f,  0.5f, 0.0f, 1.0f }, { 0.0f, 0.0f, 0.0f, 0.0f } },
-        { {  0.5f,  0.5f, 0.0f, 1.0f }, { 1.0f, 0.0f, 0.0f, 0.0f } },
         { {  0.5f, -0.5f, 0.0f, 1.0f }, { 1.0f, 1.0f, 0.0f, 0.0f } },
+        { {  0.5f,  0.5f, 0.0f, 1.0f }, { 1.0f, 0.0f, 0.0f, 0.0f } },
     };
 
     if (!gVertexBuffer.InitializeWithData(device, gCommandList.GetCommandList(), vertices, sizeof(vertices), D3D12_RESOURCE_STATE_VERTEX_AND_CONSTANT_BUFFER)) {
@@ -274,7 +271,7 @@ bool InitD3D12() {
     gVertexBuffer.SetStride(sizeof(Vertex));
     gVertexBuffer.SetBufferType(BufferType::Vertex);
 
-    if (!LoadTexture("Res/Image/earth_d.jpg", gDiffuseTexture, gDiffuseSRV, device, gSRVHeap, gCommandList.GetCommandList(), gCommandAllocator, gCommandQueue)) {
+    if (!LoadTexture("Res/Image/earth.png", gDiffuseTexture, gDiffuseSRV, device, gSRVHeap, gCommandList.GetCommandList(), gCommandAllocator, gCommandQueue)) {
         Log("[ERROR] Failed to load texture");
         return false;
     }
@@ -384,23 +381,21 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 
             BeginRender();
 
+            gCommandList.SetRootSignature(gRootSignature.GetRootSignature());
+            gCommandList.SetPipelineState(gPipelineState.GetPipelineState());
+
             ID3D12DescriptorHeap* heaps[] = { gSRVHeap.GetDescriptorHeap() };
             gCommandList.SetDescriptorHeaps(1, heaps);
             gCommandList.SetGraphicsRootDescriptorTable(0, gSRVHeap.GetGPUDescriptorHandleForHeapStart());
-
-            gCommandList.SetPipelineState(gPipelineState.GetPipelineState());
-            gCommandList.SetRootSignature(gRootSignature.GetRootSignature());
-            gCommandList.SetPrimitiveTopology(PrimitiveTopology::TriangleList);
+            gCommandList.SetPrimitiveTopology(PrimitiveTopology::TriangleStrip);
             gCommandList.SetVertexBuffer(0, gVertexBuffer.GetResource(), 0, gVertexBuffer.GetStride());
             gCommandList.Draw(4, 1, 0, 0);
 
             frameCount++;
 
             if (frameCount >= targetFrameCount) {
-                Log("[INFO] Reached target frame count %d - taking screenshot!", targetFrameCount);
                 ExecuteCommandList();
                 WaitForGPU();
-                Log("[INFO] GPU idle, taking screenshot...");
                 
                 bool screenshotResult = D3D12Screenshot::Capture(
                     gDevice,

tests/RHI/D3D12/integration/run.bat

@@ -1,7 +0,0 @@
-@echo off
-cd /d "%~dp0..\..\..\..\build\tests\RHI\D3D12\integration\Debug"
-if exist "D3D12_engine_log.txt" del "D3D12_engine_log.txt"
-if exist "screenshot.ppm" del "screenshot.ppm"
-D3D12.exe
-python "%~dp0compare_ppm.py" "screenshot.ppm" "GT.ppm" 5
-pause