C++ ComPtr::Reset方法代码示例

//.........这里部分代码省略.........

	// Discard the back buffer contents after presenting.
	swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

	// Don't set the advanced flags.
	swapChainDesc.Flags = 0;

	// Set the feature level to DirectX 11.
	featureLevel = D3D_FEATURE_LEVEL_11_0;

	// Create the swap chain, Direct3D device, and Direct3D device context.
	result = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, 0, &featureLevel, 1,
		D3D11_SDK_VERSION, &swapChainDesc, &m_pSwapChain, &m_device, NULL, &m_deviceContext);
	if (FAILED(result))
	{
		return false;
	}

	// Get the pointer to the back buffer.
	result = m_pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&backBufferPtr);
	if (FAILED(result))
	{
		return false;
	}

	// Create the render target view with the back buffer pointer.
	result = m_device->CreateRenderTargetView(backBufferPtr.Get(), NULL, &m_renderTargetView);
	if (FAILED(result))
	{
		return false;
	}

	// Release pointer to the back buffer as we no longer need it.
	backBufferPtr.Reset();
	backBufferPtr = nullptr;

	// Initialize the description of the depth buffer.
	ZeroMemory(&depthBufferDesc, sizeof(depthBufferDesc));

	// Set up the description of the depth buffer.
	depthBufferDesc.Width = screenWidth;
	depthBufferDesc.Height = screenHeight;
	depthBufferDesc.MipLevels = 1;
	depthBufferDesc.ArraySize = 1;
	depthBufferDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
	depthBufferDesc.SampleDesc.Count = 1;
	depthBufferDesc.SampleDesc.Quality = 0;
	depthBufferDesc.Usage = D3D11_USAGE_DEFAULT;
	depthBufferDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
	depthBufferDesc.CPUAccessFlags = 0;
	depthBufferDesc.MiscFlags = 0;

	// Create the texture for the depth buffer using the filled out description.
	result = m_device->CreateTexture2D(&depthBufferDesc, NULL, &m_depthStencilBuffer);
	if (FAILED(result))
	{
		return false;
	}

	// Initialize the description of the stencil state.
	ZeroMemory(&depthStencilDesc, sizeof(depthStencilDesc));

	// Set up the description of the stencil state.
	depthStencilDesc.DepthEnable = true;
	depthStencilDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
	depthStencilDesc.DepthFunc = D3D11_COMPARISON_LESS;

void Scene::onInit()
{
	this->mpZBufferDSV.Reset();
	this->mpZBuffer.Reset();
	this->mpBackBufferRTV.Reset();
	this->mpBackBuffer.Reset();
	this->mpImmediateContext.Reset();
	this->mpDevice.Reset();
	this->mpSwapChain.Reset();

	//デバイスなどを作り直す

	//DXGIを使う上で必要となるIDXGIFactory1を作成
	HRESULT hr;
	Microsoft::WRL::ComPtr<IDXGIFactory1> pFactory;
	hr = CreateDXGIFactory1(IID_PPV_ARGS(pFactory.GetAddressOf()));
	if (FAILED(hr)) {
		throw std::runtime_error("IDXGIFactoryクラスの作成に失敗しました。");
	}

	//GPUアダプターを列挙して一番最初に見つかった使えるものを選ぶ
	Microsoft::WRL::ComPtr<IDXGIAdapter1> pAdapterIt;
	for (UINT adapterIndex = 0; S_OK == pFactory->EnumAdapters1(adapterIndex, pAdapterIt.GetAddressOf());  ++adapterIndex) {
		DXGI_ADAPTER_DESC1 desc;
		pAdapterIt->GetDesc1(&desc);
		OutputDebugStringA(  std::string("adapter " + std::to_string(adapterIndex) + "\n").c_str());
		OutputDebugStringW((std::wstring(L"  decription =  ") + desc.Description + L"\n").c_str());
		OutputDebugStringA(  std::string("  VemdorId =  " + std::to_string(desc.VendorId) + "\n").c_str());
		OutputDebugStringA(  std::string("  DeviceId =  " + std::to_string(desc.DeviceId) + "\n").c_str());
		OutputDebugStringA(  std::string("  SubSysId =  " + std::to_string(desc.SubSysId) + "\n").c_str());
		OutputDebugStringA(  std::string("  Revision =  " + std::to_string(desc.Revision) + "\n").c_str());
		OutputDebugStringA(  std::string("  DedicatedVideoMemory =  " + std::to_string(desc.DedicatedVideoMemory) + "\n").c_str());
		OutputDebugStringA(  std::string("  DedicatedSystemMemory =  " + std::to_string(desc.DedicatedSystemMemory) + "\n").c_str());
		OutputDebugStringA(  std::string("  SharedSystemMemory =  " + std::to_string(desc.SharedSystemMemory) + "\n").c_str());
		OutputDebugStringA(  std::string("  AdapterLuid =  high:" + std::to_string(desc.AdapterLuid.HighPart) + " low:" + std::to_string(desc.AdapterLuid.LowPart) + "\n").c_str());
		OutputDebugStringA(  std::string("  Flag = " + std::to_string(desc.Flags) + "\n").c_str());

		if (nullptr == this->mpAdapter) {
			if (desc.Flags ^= DXGI_ADAPTER_FLAG_SOFTWARE) {
				this->mpAdapter = pAdapterIt;
				OutputDebugStringA(std::string("このアダプターを使用します。 adapterIndex = " + std::to_string(adapterIndex) + "\n").c_str());
			}

			//期待通りに動作してくれなかった
			//LARGE_INTEGER version;
			//hr = pAdapterIt->CheckInterfaceSupport(__uuidof(ID3D11Device), &version);
			//DXGI_ERROR_UNSUPPORTED;
			//if (S_OK == hr) {
			//	pAdapter = pAdapterIt;
			//	OutputDebugStringA(std::string("このアダプターを使用します。 adapterIndex = " + std::to_string(adapterIndex) + "\n").c_str());
			//}
		}

		//使い終わったら必ずReleaseすること
		pAdapterIt.Reset();
	}

	//ID3D11DeviceとID3D11DeviceContextの作成
	std::array<D3D_FEATURE_LEVEL, 3> featureLevels = { {
			D3D_FEATURE_LEVEL_11_0,
			D3D_FEATURE_LEVEL_10_1,
			D3D_FEATURE_LEVEL_10_0
		} };
	UINT flags = 0;
#ifdef _DEBUG
	flags |= D3D11_CREATE_DEVICE_DEBUG;
#endif
	D3D_FEATURE_LEVEL usedLevel;
	hr = D3D11CreateDevice(
		this->mpAdapter.Get(),
		D3D_DRIVER_TYPE_UNKNOWN,
		nullptr,
		flags,
		featureLevels.data(),
		static_cast<UINT>(featureLevels.size()),
		D3D11_SDK_VERSION,
		this->mpDevice.GetAddressOf(),
		&usedLevel,
		this->mpImmediateContext.GetAddressOf()
		);

	if (FAILED(hr)) {
		throw std::runtime_error("ID3D11Deviceの作成に失敗。");
	}

	//IDXGISwapChainの作成
	DXGI_SWAP_CHAIN_DESC swapChainDesc = { 0 };
	swapChainDesc.OutputWindow = Win32Application::hwnd();
	swapChainDesc.BufferCount = 2;
	swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_SEQUENTIAL;

	swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	swapChainDesc.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
	//swapChainDesc.Flags = 0;
	swapChainDesc.SampleDesc.Count = 1;
	swapChainDesc.SampleDesc.Quality = 0;
	//フルスクリーンとウィンドモードの切り替えがしたい場合は、まずウィンドウモードとして生成することを推奨しているみたい
	//https://msdn.microsoft.com/en-us/library/bb174579(v=vs.85).aspx
	swapChainDesc.Windowed = true;

//.........这里部分代码省略.........