Tech Notes: Device Enumeration for PC

// return true to retry later (e.g. after display lost)
static bool MainLoop(bool retryCreate)
{
    ...
    
    // During initialization 
    ovrSession session;
    ovrGraphicsLuid luid;
    ovrResult result = ovr_Create(&session, &luid);
    if (!OVR_SUCCESS(result))
        return retryCreate;

    ovrHmdDesc hmdDesc = ovr_GetHmdDesc(session);

    // Setup Device and Graphics
    IDXGIFactory4 * DXGIFactory = nullptr;
    HRESULT hr = CreateDXGIFactory1(IID_PPV_ARGS(&DXGIFactory));
    VALIDATE((hr == ERROR_SUCCESS), "CreateDXGIFactory1 failed");

    IDXGIAdapter * Adapter = nullptr;
    for (UINT iAdapter = 0; DXGIFactory->EnumAdapters(iAdapter, &Adapter) != DXGI_ERROR_NOT_FOUND; ++iAdapter)
    {
        DXGI_ADAPTER_DESC adapterDesc;
        Adapter->GetDesc(&adapterDesc);
        if (memcmp(&adapterDesc.AdapterLuid, &luid, sizeof(LUID)) == 0)
            break;
        Release(Adapter);
    }

    ID3D11Device           * Device;
    ID3D11DeviceContext    * Context;
    auto DriverType = Adapter ? D3D_DRIVER_TYPE_UNKNOWN : D3D_DRIVER_TYPE_HARDWARE;
    hr = D3D11CreateDevice(Adapter, DriverType, 0, 0, 0, 0, D3D11_SDK_VERSION, &Device, 0, &Context);
    Release(Adapter);
    VALIDATE((hr == ERROR_SUCCESS), "D3D11CreateDevice failed");
    
    ...
}