Replace depth buffer creation with D3D12Texture wrapper

tests/D3D12/main.cpp

@@ -59,7 +59,6 @@ XCEngine::RHI::D3D12CommandQueue gCommandQueue;
 XCEngine::RHI::D3D12SwapChain gSwapChain;
 
 // 渲染目标 (SwapChain的后台Buffer)
-ID3D12Resource* gDSRT = nullptr;  // 深度模板缓冲
 ID3D12Resource* gColorRTs[2];      // 颜色缓冲 (双缓冲)
 int gCurrentRTIndex = 0;
 
@@ -84,6 +83,7 @@ XCEngine::RHI::D3D12Shader gPixelShader;
 XCEngine::RHI::D3D12Buffer gConstantBuffer;  // matrices
 XCEngine::RHI::D3D12Buffer gMaterialBuffer;  // material data
 XCEngine::RHI::D3D12Texture gTexture;  // earth texture
+XCEngine::RHI::D3D12Texture gDepthStencil;  // depth stencil buffer
 XCEngine::RHI::D3D12ShaderResourceView gTextureSRV;  // texture SRV
 
 // 同步对象
@@ -486,34 +486,8 @@ bool InitD3D12(HWND inHWND, int inWidth, int inHeight) {
 	dxgiFactory->CreateSwapChain(gCommandQueue.GetCommandQueue(), &swapChainDesc, &swapChain);
 	gSwapChain.Initialize(swapChain, inWidth, inHeight);
 
-	D3D12_HEAP_PROPERTIES d3dHeapProperties = {};
-	d3dHeapProperties.Type = D3D12_HEAP_TYPE_DEFAULT;
-
-	D3D12_RESOURCE_DESC d3d12ResourceDesc = {};
-	d3d12ResourceDesc.Dimension = D3D12_RESOURCE_DIMENSION_TEXTURE2D;
-	d3d12ResourceDesc.Alignment = 0;
-	d3d12ResourceDesc.Width = inWidth;
-	d3d12ResourceDesc.Height = inHeight;
-	d3d12ResourceDesc.DepthOrArraySize = 1;
-	d3d12ResourceDesc.MipLevels = 1;
-	d3d12ResourceDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
-	d3d12ResourceDesc.SampleDesc.Count = 1;
-	d3d12ResourceDesc.SampleDesc.Quality = 0;
-	d3d12ResourceDesc.Layout = D3D12_TEXTURE_LAYOUT_UNKNOWN;
-	d3d12ResourceDesc.Flags = D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL;
-
-	D3D12_CLEAR_VALUE dsClearValue = {};
-	dsClearValue.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
-	dsClearValue.DepthStencil.Depth = 1.0f;
-	dsClearValue.DepthStencil.Stencil = 0;
-
-	device->CreateCommittedResource(&d3dHeapProperties,
-		D3D12_HEAP_FLAG_NONE,
-		&d3d12ResourceDesc,
-		D3D12_RESOURCE_STATE_DEPTH_WRITE,
-		&dsClearValue,
-		IID_PPV_ARGS(&gDSRT)
-	);
+	gDepthStencil.InitializeDepthStencil(device, inWidth, inHeight);
+	ID3D12Resource* gDSRT = gDepthStencil.GetResource();
 
 	D3D12_DESCRIPTOR_HEAP_DESC d3dDescriptorHeapDescRTV = {};
 	d3dDescriptorHeapDescRTV.NumDescriptors = 2;