/// <summary>
/// Updates resources associated with a holographic camera's swap chain.
/// The app does not access the swap chain directly, but it does create
/// resource views for the back buffer.
/// </summary>
public void CreateResourcesForBackBuffer(
DeviceResources deviceResources,
HolographicCameraRenderingParameters cameraParameters)
{
var device = deviceResources.D3DDevice;
// Get the WinRT object representing the holographic camera's back buffer.
IDirect3DSurface surface = cameraParameters.Direct3D11BackBuffer;
// Get a DXGI interface for the holographic camera's back buffer.
// Holographic cameras do not provide the DXGI swap chain, which is owned
// by the system. The Direct3D back buffer resource is provided using WinRT
// interop APIs.
InteropStatics.IDirect3DDxgiInterfaceAccess surfaceDxgiInterfaceAccess = surface as InteropStatics.IDirect3DDxgiInterfaceAccess;
IntPtr pResource = surfaceDxgiInterfaceAccess.GetInterface(InteropStatics.ID3D11Resource);
Resource resource = SharpDX.CppObject.FromPointer <Resource>(pResource);
Marshal.Release(pResource);
// Get a Direct3D interface for the holographic camera's back buffer.
Texture2D cameraBackBuffer = resource.QueryInterface <Texture2D>();
// Determine if the back buffer has changed. If so, ensure that the render target view
// is for the current back buffer.
if ((this.d3dBackBuffer == null) || (this.d3dBackBuffer.NativePointer != cameraBackBuffer.NativePointer))
{
// This can change every frame as the system moves to the next buffer in the
// swap chain. This mode of operation will occur when certain rendering modes
// are activated.
this.d3dBackBuffer = cameraBackBuffer;
// Get the DXGI format for the back buffer.
// This information can be accessed by the app using CameraResources::GetBackBufferDXGIFormat().
Texture2DDescription backBufferDesc = this.BackBufferTexture2D.Description;
// backBufferDesc.SampleDescription = new SharpDX.DXGI.SampleDescription(8, 8);
this.dxgiFormat = backBufferDesc.Format;
// Check for render target size changes.
Size currentSize = this.holographicCamera.RenderTargetSize;
if (this.d3dRenderTargetSize != currentSize)
{
// Set render target size.
this.d3dRenderTargetSize = this.HolographicCamera.RenderTargetSize;
}
}
// Create the constant buffer, if needed.
if (this.viewProjectionConstantBuffer == null)
{
// Create a constant buffer to store view and projection matrices for the camera.
ViewProjectionConstantBuffer viewProjectionConstantBufferData = new ViewProjectionConstantBuffer();
this.viewProjectionConstantBuffer = this.ToDispose(SharpDX.Direct3D11.Buffer.Create(
device,
BindFlags.ConstantBuffer,
ref viewProjectionConstantBufferData));
}
}
/// <summary>
/// Updates resources associated with a holographic camera's swap chain.
/// The app does not access the swap chain directly, but it does create
/// resource views for the back buffer.
/// </summary>
public void CreateResourcesForBackBuffer(
DeviceResources deviceResources,
HolographicCameraRenderingParameters cameraParameters
)
{
var device = deviceResources.D3DDevice;
// Get the WinRT object representing the holographic camera's back buffer.
IDirect3DSurface surface = cameraParameters.Direct3D11BackBuffer;
// Get a DXGI interface for the holographic camera's back buffer.
// Holographic cameras do not provide the DXGI swap chain, which is owned
// by the system. The Direct3D back buffer resource is provided using WinRT
// interop APIs.
InteropStatics.IDirect3DDxgiInterfaceAccess surfaceDxgiInterfaceAccess = surface as InteropStatics.IDirect3DDxgiInterfaceAccess;
IntPtr pResource = surfaceDxgiInterfaceAccess.GetInterface(InteropStatics.ID3D11Resource);
SharpDX.Direct3D11.Resource resource = SharpDX.Direct3D11.Resource.FromPointer <SharpDX.Direct3D11.Resource>(pResource);
Marshal.Release(pResource);
// Get a Direct3D interface for the holographic camera's back buffer.
Texture2D cameraBackBuffer = resource.QueryInterface <Texture2D>();
// Determine if the back buffer has changed. If so, ensure that the render target view
// is for the current back buffer.
if ((null == d3dBackBuffer) || (d3dBackBuffer.NativePointer != cameraBackBuffer.NativePointer))
{
// This can change every frame as the system moves to the next buffer in the
// swap chain. This mode of operation will occur when certain rendering modes
// are activated.
d3dBackBuffer = cameraBackBuffer;
// Create a render target view of the back buffer.
// Creating this resource is inexpensive, and is better than keeping track of
// the back buffers in order to pre-allocate render target views for each one.
d3dRenderTargetView = this.ToDispose(new RenderTargetView(device, BackBufferTexture2D));
// Get the DXGI format for the back buffer.
// This information can be accessed by the app using CameraResources::GetBackBufferDXGIFormat().
Texture2DDescription backBufferDesc = BackBufferTexture2D.Description;
dxgiFormat = backBufferDesc.Format;
// Check for render target size changes.
Size currentSize = holographicCamera.RenderTargetSize;
if (d3dRenderTargetSize != currentSize)
{
// Set render target size.
d3dRenderTargetSize = HolographicCamera.RenderTargetSize;
// A new depth stencil view is also needed.
this.RemoveAndDispose(ref d3dDepthStencilView);
}
}
// Refresh depth stencil resources, if needed.
if (null == DepthStencilView)
{
// Create a depth stencil view for use with 3D rendering if needed.
var depthStencilDesc = new Texture2DDescription
{
Format = SharpDX.DXGI.Format.D16_UNorm,
Width = (int)RenderTargetSize.Width,
Height = (int)RenderTargetSize.Height,
ArraySize = IsRenderingStereoscopic ? 2 : 1, // Create two textures when rendering in stereo.
MipLevels = 1, // Use a single mipmap level.
BindFlags = BindFlags.DepthStencil,
SampleDescription = new SharpDX.DXGI.SampleDescription(1, 0)
};
using (var depthStencil = new Texture2D(device, depthStencilDesc))
{
var depthStencilViewDesc = new DepthStencilViewDescription();
depthStencilViewDesc.Dimension = IsRenderingStereoscopic ? DepthStencilViewDimension.Texture2DArray : DepthStencilViewDimension.Texture2D;
depthStencilViewDesc.Texture2DArray.ArraySize = IsRenderingStereoscopic ? 2 : 0;
d3dDepthStencilView = this.ToDispose(new DepthStencilView(device, depthStencil, depthStencilViewDesc));
}
}
// Create the constant buffer, if needed.
if (null == viewProjectionConstantBuffer)
{
// Create a constant buffer to store view and projection matrices for the camera.
ViewProjectionConstantBuffer viewProjectionConstantBufferData = new ViewProjectionConstantBuffer();
viewProjectionConstantBuffer = this.ToDispose(SharpDX.Direct3D11.Buffer.Create(
device,
BindFlags.ConstantBuffer,
ref viewProjectionConstantBufferData));
}
}
