Method Create

Source/Engine/GraphicsDevice/DirectX/DX11/GPUDeviceDX11.cpp:189–335

}

GPUDevice* GPUDeviceDX11::Create()
{
    // Configuration
#if DX11_FORCE_USE_DX10
	D3D_FEATURE_LEVEL maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_10_0;
#elif DX11_FORCE_USE_DX10_1
	D3D_FEATURE_LEVEL maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_10_1;
#else
    D3D_FEATURE_LEVEL maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_11_0;
#endif
    if (CommandLine::Options.D3D10.IsTrue())
        maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_10_0;
    else if (CommandLine::Options.D3D11.IsTrue())
        maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_11_0;
#if !USE_EDITOR && PLATFORM_WINDOWS
	auto winSettings = WindowsPlatformSettings::Get();
	if (!winSettings->SupportDX11 && !winSettings->SupportDX10)
	{
		// Skip if there is no support
		LOG(Warning, "Cannot use DirectX (support disabled).");
		return nullptr;
	}
	if (!winSettings->SupportDX11 && maxAllowedFeatureLevel == D3D_FEATURE_LEVEL_11_0)
	{
		// Downgrade if there is no SM5 support
		maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_10_0;
		LOG(Warning, "Cannot use DirectX 11 (support disabled).");
	}
	if (!winSettings->SupportDX10 && maxAllowedFeatureLevel == D3D_FEATURE_LEVEL_10_0)
	{
		// Upgrade if there is no SM4 support
		maxAllowedFeatureLevel = D3D_FEATURE_LEVEL_11_0;
		LOG(Warning, "Cannot use DirectX 10 (support disabled).");
	}
#endif

    // Create DXGI factory
#if PLATFORM_WINDOWS
    IDXGIFactory1* dxgiFactory;
    IDXGIFactory6* dxgiFactory6;
    HRESULT hr = CreateDXGIFactory1(IID_PPV_ARGS(&dxgiFactory6));
    if (hr == S_OK)
        dxgiFactory = dxgiFactory6;
    else
    {
        dxgiFactory6 = nullptr;
        hr = CreateDXGIFactory1(IID_PPV_ARGS(&dxgiFactory));
    }
#else
    IDXGIFactory2* dxgiFactory;
    HRESULT hr = CreateDXGIFactory1(IID_PPV_ARGS(&dxgiFactory));
#endif
    if (hr != S_OK)
    {
        LOG(Error, "Cannot create DXGI adapter. Error code: {0:x}.", hr);
        return nullptr;
    }