{

HRESULT hr = S_OK;

UINT width = 640;

UINT height = 480;

UINT createDeviceFlags = 0;

D3D_DRIVER_TYPE driverTypes[] =

{

D3D_DRIVER_TYPE_HARDWARE,

D3D_DRIVER_TYPE_WARP,

D3D_DRIVER_TYPE_REFERENCE,

};

UINT numDriverTypes = ARRAYSIZE(driverTypes);

D3D_FEATURE_LEVEL featureLevels[] =

{

D3D_FEATURE_LEVEL_11_0,

D3D_FEATURE_LEVEL_10_1,

D3D_FEATURE_LEVEL_10_0,

};

UINT numFeatureLevels = ARRAYSIZE(featureLevels);

DXGI_SWAP_CHAIN_DESC sd;

ZeroMemory( &sd, sizeof( sd ) );

sd.BufferCount = 1;

sd.BufferDesc.Width = width;

sd.BufferDesc.Height = height;

#ifdef CHECK_NV12

sd.BufferDesc.Format = DXGI_FORMAT_NV12;

#else

sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;

#endif

sd.BufferDesc.RefreshRate.Numerator = 60;

sd.BufferDesc.RefreshRate.Denominator = 1;

sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;

sd.OutputWindow = NULL; //g_hWnd;

sd.SampleDesc.Count = 1;

sd.SampleDesc.Quality = 0;

sd.Windowed = TRUE;

for (UINT driverTypeIndex = 0; driverTypeIndex < numDriverTypes; driverTypeIndex++)

{

g_driverType = driverTypes[driverTypeIndex];

hr = D3D11CreateDeviceAndSwapChain(NULL, g_driverType, NULL, createDeviceFlags, featureLevels, numFeatureLevels,

D3D11_SDK_VERSION, &sd, &g_pSwapChain, &g_pd3dDevice, &g_featureLevel, &g_pImmediateContext);

if (SUCCEEDED(hr))

break;

}

if (FAILED(hr))

return hr;

return S_OK;

{

InitDevice();

return 0;