自学教程：C++ D3D11CreateDevice函数代码示例

HRESULT DeviceResources::Initialize(){	HRESULT hr;	D3D_FEATURE_LEVEL featureLevels[] =	{		D3D_FEATURE_LEVEL_11_0,		D3D_FEATURE_LEVEL_10_1,		D3D_FEATURE_LEVEL_10_0,		D3D_FEATURE_LEVEL_9_3,		D3D_FEATURE_LEVEL_9_2,		D3D_FEATURE_LEVEL_9_1	};	UINT numFeatureLevels = ARRAYSIZE(featureLevels);	UINT createDeviceFlags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;#ifdef _DEBUG	createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;#endif	this->_d3dDriverType = D3D_DRIVER_TYPE_HARDWARE;	hr = D3D11CreateDevice(nullptr, this->_d3dDriverType, nullptr, createDeviceFlags, featureLevels, numFeatureLevels, D3D11_SDK_VERSION, &this->_d3dDevice, &this->_d3dFeatureLevel, &this->_d3dDeviceContext);	if (FAILED(hr))	{		this->_d3dDriverType = D3D_DRIVER_TYPE_WARP;		hr = D3D11CreateDevice(nullptr, this->_d3dDriverType, nullptr, createDeviceFlags, featureLevels, numFeatureLevels, D3D11_SDK_VERSION, &this->_d3dDevice, &this->_d3dFeatureLevel, &this->_d3dDeviceContext);	}	this->CheckMultisamplingSupport();	if (SUCCEEDED(hr))	{		hr = this->LoadMainResources();	}	if (SUCCEEDED(hr))	{		hr = this->LoadResources();	}	if (FAILED(hr))	{		static bool messageShown = false;		if (!messageShown)		{			MessageBox(nullptr, _com_error(hr).ErrorMessage(), __FUNCTION__, MB_ICONERROR);		}		messageShown = true;	}	return hr;}

/*-------------------------------------------	デバイスの作成--------------------------------------------*/HRESULT CreateDevice(void){	HRESULT hr;	// ハ
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