/// <summary>
/// CreateResources is called when the VirtualRealityProvider is initialized and should create the DirectX resources.
/// </summary>
/// <remarks>
/// <para>
/// <b>CreateResources</b> is called when the VirtualRealityProvider is initialized and should create the DirectX resources.
/// </para>
/// <para>
/// This method is called after this virtual reality provider is registered with calling the <see cref="DXScene.InitializeVirtualRealityRendering"/> method.
/// This method then calls the <see cref="DXSceneResource.InitializeResources"/> and the <see cref="VirtualRealityProviderBase.OnInitializeResources"/>.
/// OnInitializeResources calls the this CreateResources method and then <see cref="VirtualRealityProviderBase.InitializeRenderingSteps"/> method.
/// </para>
/// <para>
/// This method usually creates pixel shaders and constant buffers.
/// Other resources (back buffers and views) are usually created in <see cref="VirtualRealityProviderBase.UpdateRenderingContext"/> where the size of the current back buffer is compared with the size of back buffers for virtual reality.
/// </para>
/// </remarks>
/// <param name="dxScene">parent DXScene</param>
protected override void CreateResources(DXScene dxScene)
{
if (_eyeTextureSwapChains != null)
{
if (_eyeTextureSwapChains[0] != null)
{
_eyeTextureSwapChains[0].Dispose();
}
if (_eyeTextureSwapChains[1] != null)
{
_eyeTextureSwapChains[1].Dispose();
}
}
else
{
_eyeTextureSwapChains = new OculusTextureSwapChain[2];
}
_eyeTextureSwapChains[0] = new OculusTextureSwapChain(_ovr,
_sessionPtr,
dxScene.Device,
EyeType.Left,
Format.B8G8R8A8_UNorm_SRgb,
_ovr.GetFovTextureSize(_sessionPtr, EyeType.Left, _hmdDesc.DefaultEyeFov[0], 1.0f),
createDepthStencilView: true,
isDebugDevice: dxScene.DXDevice.IsDebugDevice);
_eyeTextureSwapChains[1] = new OculusTextureSwapChain(_ovr,
_sessionPtr,
dxScene.Device,
EyeType.Left,
Format.B8G8R8A8_UNorm_SRgb,
_ovr.GetFovTextureSize(_sessionPtr, EyeType.Right, _hmdDesc.DefaultEyeFov[1], 1.0f),
createDepthStencilView: true,
isDebugDevice: dxScene.DXDevice.IsDebugDevice);
_layerShared = new LayerEyeFov();
_layerShared.Header = new LayerHeader()
{
Type = LayerType.EyeFov,
Flags = LayerFlags.HighQuality
};
// Specify the texture to show on the HMD.
_layerShared.ColorTextureLeft = _eyeTextureSwapChains[0].TextureSwapChainPtr;
_layerShared.ColorTextureRight = _eyeTextureSwapChains[1].TextureSwapChainPtr;
_layerShared.ViewportLeft.Position = new Vector2i(0, 0);
_layerShared.ViewportLeft.Size = _eyeTextureSwapChains[0].Size;
_layerShared.ViewportRight.Position = new Vector2i(0, 0);
_layerShared.ViewportRight.Size = _eyeTextureSwapChains[1].Size;
_layerShared.FovLeft = _hmdDesc.DefaultEyeFov[0];
_layerShared.FovRight = _hmdDesc.DefaultEyeFov[1];
_eyeRenderDesc[0] = _ovr.GetRenderDesc(_sessionPtr, EyeType.Left, _hmdDesc.DefaultEyeFov[0]);
_hmdToEyeOffset[1] = _eyeRenderDesc[1].HmdToEyePose.Position;
_eyeRenderDesc[1] = _ovr.GetRenderDesc(_sessionPtr, EyeType.Right, _hmdDesc.DefaultEyeFov[1]);
_hmdToEyeOffset[1] = _eyeRenderDesc[1].HmdToEyePose.Position;
// Create MSAA back buffer if needed
UpdateMsaaBackBuffer(_eyeTextureSwapChains[0].Size.Width, _eyeTextureSwapChains[0].Size.Height, _multisamplingCount);
_mirrorTextureDesc = new MirrorTextureDesc()
{
Format = SharpDXHelpers.GetTextureFormat(dxScene.BackBufferDescription.Format),
Height = dxScene.BackBufferDescription.Height,
MiscFlags = dxScene.BackBufferDescription.MipLevels != 1 ? TextureMiscFlags.AllowGenerateMips : TextureMiscFlags.None,
Width = dxScene.BackBufferDescription.Width
};
// FloorLevel will give tracking poses where the floor height is 0
_ovr.SetTrackingOriginType(_sessionPtr, TrackingOrigin.EyeLevel);
IntPtr mirrorTexturePtr;
var result = _ovr.CreateMirrorTextureDX(_sessionPtr, dxScene.Device.NativePointer, ref _mirrorTextureDesc, out mirrorTexturePtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to create Oculus mirror texture: " + lastError.ErrorString, lastError.Result);
}
_mirrorTexture = new OculusMirrorTexture(_ovr, _sessionPtr, mirrorTexturePtr);
// Retrieve the Direct3D texture contained in the Oculus MirrorTexture.
IntPtr mirrorTextureComPtr;
result = _mirrorTexture.GetBufferDX(typeof(Texture2D).GUID, out mirrorTextureComPtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to retrieve the texture from the created mirror texture buffer: " + lastError.ErrorString, lastError.Result);
}
// Create a managed Texture2D, based on the unmanaged texture pointer.
_mirrorTextureDX = new Texture2D(mirrorTextureComPtr);
if (dxScene.DXDevice.IsDebugDevice)
{
_mirrorTextureDX.DebugName = "OculusMirrorTexture";
}
// To prevent DirectX from rendering more then one frame in the background,
// we need to set the MaximumFrameLatency to 1.
// This prevents occasional dropped frames in Oculus Rift.
var dxgiDevice = dxScene.Device.QueryInterface <SharpDX.DXGI.Device1>();
if (dxgiDevice != null)
{
dxgiDevice.MaximumFrameLatency = 1;
dxgiDevice.Dispose();
}
_frameIndex = 0;
_matrixCamera = new MatrixCamera();
}
public OculusTextureSwapChain(OvrWrap ovr,
IntPtr sessionPtr,
SharpDX.Direct3D11.Device device,
EyeType eye,
Format format,
Sizei size,
bool createDepthStencilView = false,
bool isDebugDevice = false)
{
_ovr = ovr;
_sessionPtr = sessionPtr;
_size = size;
_viewportSize = size;
_viewport = new ViewportF(0.0f, 0.0f, (float)size.Width, (float)size.Height);
Format srgbFormat = GetSRgbFormat(format);
TextureFormat textureFormat = SharpDXHelpers.GetTextureFormat(srgbFormat);
TextureSwapChainDesc swapChainDesc = new TextureSwapChainDesc()
{
ArraySize = 1,
BindFlags = TextureBindFlags.DX_RenderTarget,
Format = textureFormat,
Height = _size.Height,
MipLevels = 1,
MiscFlags = TextureMiscFlags.DX_Typeless,
SampleCount = 1,
Width = _size.Width
};
Texture2DDescription description1 = new Texture2DDescription()
{
ArraySize = 1,
BindFlags = BindFlags.DepthStencil,
CpuAccessFlags = CpuAccessFlags.None,
Format = Format.R24G8_Typeless,
Height = _size.Height,
MipLevels = 1,
OptionFlags = ResourceOptionFlags.None,
SampleDescription = new SampleDescription(1, 0),
Usage = ResourceUsage.Default,
Width = _size.Width
};
ShaderResourceViewDescription description2 = new ShaderResourceViewDescription()
{
Format = srgbFormat,
Dimension = ShaderResourceViewDimension.Texture2D
};
description2.Texture2D.MipLevels = 1;
// Create a texture swap chain, which will contain the textures to render to, for the current eye.
var result = _ovr.CreateTextureSwapChainDX(_sessionPtr, device.NativePointer, ref swapChainDesc, out _textureSwapChainPtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Error creating Oculus TextureSwapChain: " + lastError.ErrorString, lastError.Result);
}
int length;
result = _ovr.GetTextureSwapChainLength(_sessionPtr, _textureSwapChainPtr, out length);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to retrieve the number of buffers of the created swap chain: " + lastError.ErrorString, lastError.Result);
}
_textures = new TextureItem[length];
for (int index = 0; index < length; ++index)
{
IntPtr bufferPtr;
result = _ovr.GetTextureSwapChainBufferDX(_sessionPtr, _textureSwapChainPtr, index, typeof(Texture2D).GUID, out bufferPtr);
if (result < Ab3d.OculusWrap.Result.Success)
{
var lastError = _ovr.GetLastErrorInfo();
throw new OvrException("Failed to retrieve a texture from the created swap chain: " + lastError.ErrorString, lastError.Result);
}
Texture2D texture2D1 = new Texture2D(bufferPtr);
Texture2D texture2D2 = null;
DepthStencilView depthStencilView = null;
if (createDepthStencilView)
{
texture2D2 = new Texture2D(device, description1);
depthStencilView = new DepthStencilView(device, texture2D2, new DepthStencilViewDescription()
{
Flags = DepthStencilViewFlags.None,
Dimension = DepthStencilViewDimension.Texture2D,
Format = Format.D24_UNorm_S8_UInt
});
}
_textures[index] = new TextureItem()
{
Texture = texture2D1,
TextureDescription = texture2D1.Description,
DepthBuffer = texture2D2,
DepthStencilView = depthStencilView,
RTView = new RenderTargetView(device, texture2D1, new RenderTargetViewDescription()
{
Format = format,
Dimension = RenderTargetViewDimension.Texture2D
}),
SRView = new ShaderResourceView(device, texture2D1, description2)
};
if (isDebugDevice)
{
var eyeTextAndIndex = eye.ToString() + index.ToString();
_textures[index].Texture.DebugName = "OculusBackBuffer" + eyeTextAndIndex;
_textures[index].RTView.DebugName = "OculusRT" + eyeTextAndIndex;
_textures[index].SRView.DebugName = "OculusSR" + eyeTextAndIndex;
_textures[index].DepthBuffer.DebugName = "OculusDepthBuffer" + eyeTextAndIndex;
_textures[index].DepthStencilView.DebugName = "OculusDepthStencilView" + eyeTextAndIndex;
}
}
}