/// <summary>
/// Get a specific buffer within the chain as any compatible COM interface (similar to QueryInterface)
/// </summary>
/// <param name="index">
/// Specifies the index within the chain to retrieve. Must be between 0 and length (see GetTextureSwapChainLength),
/// or may pass -1 to get the buffer at the CurrentIndex location. (Saving a call to GetTextureSwapChainCurrentIndex).
/// </param>
/// <param name="iid">Specifies the interface ID of the interface pointer to query the buffer for.</param>
/// <param name="buffer">Returns the COM interface pointer retrieved.</param>
/// <returns>
/// Returns an ovrResult indicating success or failure. In the case of failure, use
/// Wrap.GetLastError to get more information.
/// </returns>
public Result GetBufferDX(int index, Guid iid, out IntPtr buffer)
{
return(_ovr.GetTextureSwapChainBufferDX(_sessionPtr, TextureSwapChainPtr, index, iid, out buffer));
}
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;
}
}
}
