Direct2D Create SwapChain

Question

I am trying to program a Direct2D desktop app based on a Windows tutorial, but am having problems creating a SwapChain1. In the code below everything gets initialized until the CreateSwapChainForHwnd. The pointer m_pDXGISwapChain1 stays NULL. All the pointers except pOutput are ComPtrs.

D2D1_FACTORY_OPTIONS options;
ZeroMemory(&options, sizeof(D2D1_FACTORY_OPTIONS));

HRESULT hr = D2D1CreateFactory(D2D1_FACTORY_TYPE_SINGLE_THREADED,
                                __uuidof(ID2D1Factory1), &options, &m_pD2DFactory1);
if(SUCCEEDED(hr))
{
    UINT creationFlags = D3D11_CREATE_DEVICE_BGRA_SUPPORT;
    D3D_FEATURE_LEVEL featureLevels[] = { D3D_FEATURE_LEVEL_11_1, D3D_FEATURE_LEVEL_11_0 };
    hr = D3D11CreateDevice(nullptr, D3D_DRIVER_TYPE_HARDWARE, 0, creationFlags,     
        featureLevels, ARRAYSIZE(featureLevels), D3D11_SDK_VERSION, &m_pD3DDevice, 
        &m_featureLevel, &m_pD3DDeviceContext);
}

if(SUCCEEDED(hr))
    hr = m_pD3DDevice.As(&m_pDXGIDevice1);

if(SUCCEEDED(hr))
    hr = m_pD2DFactory1->CreateDevice(m_pDXGIDevice1.Get(), &m_pD2DDevice);

if(SUCCEEDED(hr))
    hr =  m_pD2DDevice->CreateDeviceContext(D2D1_DEVICE_CONTEXT_OPTIONS_NONE, &m_pD2DDeviceContext);

 if(SUCCEEDED(hr))
    hr = m_pDXGIDevice1->GetAdapter(&m_pDXGIAdapter); 

 if(SUCCEEDED(hr))
    hr = m_pDXGIAdapter->GetParent(IID_PPV_ARGS(&m_pDXGIFactory2));

DXGI_SWAP_CHAIN_DESC1 swapChainDesc1 = {0};
swapChainDesc1.Width = 0; 
swapChainDesc1.Height = 0;
swapChainDesc1.Format = DXGI_FORMAT_B8G8R8A8_UNORM;      
swapChainDesc1.Stereo = false; 
swapChainDesc1.SampleDesc.Count = 1;   
swapChainDesc1.SampleDesc.Quality = 0;
swapChainDesc1.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDesc1.BufferCount = 2;   
swapChainDesc1.Scaling = DXGI_SCALING_NONE;
swapChainDesc1.SwapEffect = DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL;
swapChainDesc1.AlphaMode = DXGI_ALPHA_MODE_IGNORE;
swapChainDesc1.Flags = 0;

IDXGIOutput *pOutput;
m_pDXGIAdapter->EnumOutputs(0, &pOutput);

if(SUCCEEDED(hr))
   hr = m_pDXGIFactory2->CreateSwapChainForHwnd(
            static_cast<IUnknown*>(m_pD3DDevice.Get()), m_hwnd, &swapChainDesc1, 
            NULL, pOutput, &m_pDXGISwapChain1);

if(SUCCEEDED(hr))
    hr = m_pDXGIDevice1->SetMaximumFrameLatency(1);

if(SUCCEEDED(hr))
    hr = m_pDXGISwapChain1->GetBuffer(0, IID_PPV_ARGS(&m_pDXGIBackBuffer));

d7samurai d7samurai · Accepted Answer · 2014-02-11T20:22:10

If all your pointers are ComPtr, then the call should look like this:

ComPtr<ID3D11Device> d3dDevice;
ComPtr<IDXGIFactory2> dxgiFactory;

// assuming d3dDevice and dxgiFactory are initialized correctly:

ComPtr<IDXGISwapChain1> swapChain;
dxgiFactory->CreateSwapChainForHwnd(d3dDevice.Get(), hWnd, &swapChainDescription, nullptr, nullptr, swapChain.GetAddressOf())

As for your swap chain description, if you're making a non-Windows Store App, you should set

swapChainDescription.Scaling = DXGI_SCALING_STRETCH;
swapChainDescription.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

Both of those values are 0, so you can leave them out.

Here is the complete swap chain description that I use:

DXGI_SWAP_CHAIN_DESC1 swapChainDescription = {};
swapChainDescription.Format = DXGI_FORMAT_B8G8R8A8_UNORM;
swapChainDescription.SampleDesc.Count = 1;
swapChainDescription.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
swapChainDescription.BufferCount = 2;

See this article for full a walkthrough of how to set up Direct2D 1.1 properly - including the CreateSwapChainForHwnd call: http://msdn.microsoft.com/en-us/magazine/dn198239.aspx

Direct2D Create SwapChain

2 Answers