void InitSwapChain()
{
var panelUnknown = Marshal.GetIUnknownForObject(SwapChain);
IntPtr swapChainPanelNativePtr = IntPtr.Zero;
try
{
var guid = Guid.Parse("63aad0b8-7c24-40ff-85a8-640d944cc325");
Marshal.ThrowExceptionForHR(Marshal.QueryInterface(panelUnknown, ref guid, out swapChainPanelNativePtr));
}
finally
{
Marshal.Release(panelUnknown);
}
if (swapChainPanelNativePtr != IntPtr.Zero)
{
m_swapChainNative = (ISwapChainPanelNative *)swapChainPanelNativePtr;
try
{
#region Init SwapChain
DXGI_SWAP_CHAIN_DESC1 swapChainDesc = new DXGI_SWAP_CHAIN_DESC1
{
Width = (uint)SwapChain.ActualWidth,
Height = (uint)SwapChain.ActualHeight,
Format = colorFormat, // This is the most common swapchain format.
Stereo = 0,
BufferUsage = (uint)(1L << (1 + 4)),
BufferCount = 2,
Scaling = DXGI_SCALING.DXGI_SCALING_STRETCH,
SwapEffect = DXGI_SWAP_EFFECT.DXGI_SWAP_EFFECT_FLIP_SEQUENTIAL,
Flags = 0
};
swapChainDesc.SampleDesc.Count = 1; // Don't use multi-sampling.
swapChainDesc.SampleDesc.Quality = 0;
// Get D3DDevice
// This flag adds support for surfaces with a different color channel
// ordering than the API default. It is required for compatibility with Direct2D.
D3D11_CREATE_DEVICE_FLAG creationFlags = D3D11_CREATE_DEVICE_FLAG.D3D11_CREATE_DEVICE_BGRA_SUPPORT;
#if DEBUG
// If the project is in a debug build, enable debugging via SDK Layers.
creationFlags |= D3D11_CREATE_DEVICE_FLAG.D3D11_CREATE_DEVICE_DEBUG;
#endif
// This example only uses feature level 9.1.
D3D_FEATURE_LEVEL[] featureLevels =
{
D3D_FEATURE_LEVEL.D3D_FEATURE_LEVEL_9_1
};
var pFeatureLevel = D3D_FEATURE_LEVEL.D3D_FEATURE_LEVEL_11_1;
// Create the Direct3D 11 API device object and a corresponding context.
D3D11CreateDevice(
(IDXGIAdapter *)IntPtr.Zero.ToPointer(), // Specify nullptr to use the default adapter.
D3D_DRIVER_TYPE.D3D_DRIVER_TYPE_HARDWARE,
IntPtr.Zero,
(uint)creationFlags,
InteropUtilities.AsPointer(featureLevels.AsSpan()),
(uint)featureLevels.Length,
D3D11_SDK_VERSION, // UWP apps must set this to D3D11_SDK_VERSION.
m_d3dDevice.GetAddressOf(), // Returns the Direct3D device created.
InteropUtilities.AsPointer(ref pFeatureLevel),
m_d3dContext.GetAddressOf() // Returns the device immediate context.
);
// QI for DXGI device
m_d3dDevice.As(ref m_dxgiDevice);
// Get the DXGI adapter.
IDXGIAdapter *dxgiAdapter;
m_dxgiDevice.Get()->GetAdapter(&dxgiAdapter);
// Get the DXGI factory.
IDXGIFactory2 *dxgiFactory;
var dxgiFactoryGuid = typeof(IDXGIFactory2).GUID;
dxgiAdapter->GetParent(InteropUtilities.AsPointer(ref dxgiFactoryGuid), (void **)&dxgiFactory);
// Create a swap chain by calling CreateSwapChainForComposition.
dxgiFactory->CreateSwapChainForComposition(
(IUnknown *)(ID3D11Device *)m_d3dDevice,
&swapChainDesc,
null, // Allow on any display.
m_swapChain.GetAddressOf()
);
m_swapChainNative.Get()->SetSwapChain((IDXGISwapChain *)m_swapChain.Get());
#endregion
InitPipeline();
InitGraphics();
int hr = m_swapChain.Get()->Present(1, 0);
Marshal.ThrowExceptionForHR(hr);
SwapChain.SizeChanged += SwapChain_SizeChanged;
}
finally
{
m_swapChainNative.Get()->Release();
}
}
}
private void SwapChain_SizeChanged(object sender, SizeChangedEventArgs e)
{
uint width, height;
if (sender is Tuple <double, double> size)
{
width = (uint)size.Item1;
height = (uint)size.Item2;
}
else
{
width = (uint)e.NewSize.Width;
height = (uint)e.NewSize.Height;
}
if (width <= 0 || height <= 0)
{
return;
}
InitPipeline();
m_d3dContext.Get()->ClearState();
m_renderTargetView.Dispose();
m_depthStencilView.Dispose();
m_renderTargetView = new ComPtr <ID3D11RenderTargetView>();
m_depthStencilView = new ComPtr <ID3D11DepthStencilView>();
// resize the swap chain
int hr = m_swapChain.Get()->ResizeBuffers(
0, // Don't change buffer count
width,
height,
DXGI_FORMAT.DXGI_FORMAT_UNKNOWN, // Don't change format
0 // No flags
);
Marshal.ThrowExceptionForHR(hr);
// (re)-create the render target view
ComPtr <ID3D11Texture2D> backBuffer = new ComPtr <ID3D11Texture2D>();
var d3d11Text2D = typeof(ID3D11Texture2D).GUID;
D3D11_RENDER_TARGET_VIEW_DESC desc = new D3D11_RENDER_TARGET_VIEW_DESC
{
ViewDimension = D3D11_RTV_DIMENSION.D3D11_RTV_DIMENSION_BUFFER
};
m_renderTargetView = new ComPtr <ID3D11RenderTargetView>();
if (FAILED(m_swapChain.Get()->GetBuffer(0, InteropUtilities.AsPointer(ref d3d11Text2D), (void **)backBuffer.GetAddressOf())))
{
throw new Exception("Direct3D was unable to acquire the back buffer!");
}
if (FAILED(m_d3dDevice.Get()->CreateRenderTargetView(
(ID3D11Resource *)backBuffer.Get(),
null,
m_renderTargetView.GetAddressOf())))
{
throw new Exception("Direct3D was unable to create the render target view!");
}
// create the depth and stencil buffer
D3D11_TEXTURE2D_DESC dsd;
ComPtr <ID3D11Texture2D> dsBuffer = new ComPtr <ID3D11Texture2D>();
backBuffer.Get()->GetDesc(&dsd);
dsd.Format = DXGI_FORMAT.DXGI_FORMAT_D24_UNORM_S8_UINT;
dsd.Usage = D3D11_USAGE.D3D11_USAGE_DEFAULT;
dsd.BindFlags = (uint)D3D11_BIND_FLAG.D3D11_BIND_DEPTH_STENCIL;
if (FAILED(m_d3dDevice.Get()->CreateTexture2D(&dsd, null, dsBuffer.GetAddressOf())))
{
throw new Exception("Direct3D was unable to create a 2D-texture!");
}
if (FAILED(m_d3dDevice.Get()->CreateDepthStencilView((ID3D11Resource *)dsBuffer.Get(), null, m_depthStencilView.GetAddressOf())))
{
throw new Exception("Direct3D was unable to create the depth and stencil buffer!");
}
// activate the depth and stencil buffer
m_d3dContext.Get()->OMSetRenderTargets(1, m_renderTargetView.GetAddressOf(), m_depthStencilView.Get());
// set the viewport to the entire backbuffer
D3D11_VIEWPORT vp;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
vp.Width = dsd.Width;
vp.Height = dsd.Height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
m_d3dContext.Get()->RSSetViewports(1, &vp);
Present();
//m_renderTargetView.Get()->Release();
backBuffer.Get()->Release();
}
