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How to render to a HolographicQuadLayer in DirectX

jhegedusjhegedus ✭
in Questions And Answers

Hi,

I'm trying to use a HolographicQuadLayer to render some static, relatively positioned artifacts.

I've created the quad layer as follows

winrt::Windows::Graphics::Holographic::HolographicQuadLayer quadLayer{ winrt::Windows::Foundation::Size(1268, 720) };

and added it to the camera's list of quad layers

pCameraResources->holographicCamera.QuadLayers().Append(quadLayer);

I've also been able to successfully get the HolographicQuadLayerUpdateParameters, update the Location of the layer and acquire the buffer with the following code

HolographicQuadLayerUpdateParameters quadLayerUpdateParameters = appState.holographicFrame.GetQuadLayerUpdateParameters(quadLayer);

quadLayerUpdateParameters.UpdateExtents(winrt::Windows::Foundation::Numerics::float2(1268, 720));

quadLayerUpdateParameters.UpdateLocationWithDisplayRelativeMode(float3{0.f, 0.f, 0.f}, quaternion{float3{0.f, 0.f, 0.f}, 1});

IDirect3DSurface direct3DSurface = quadLayerUpdateParameters.AcquireBufferToUpdateContent();

This is as far as I can get though. I am unable to get a ID3D11Texture2D to which I can render. I've tried using D3D11Interop

    winrt::com_ptr<ID3D11Resource> resource;
    winrt::check_hresult(
        GetDXGIInterfaceFromObject(direct3DSurface, IID_PPV_ARGS(resource.put()));
    );

but I get a INTERFACE_NOT_SUPPORTED error

I've also tried casting to an ID3D11Texture2D as well as a ID3D11Resource with no success.

Has anyone done this or know of any code examples. I have been searching but haven't found anything yet.

Thanks,
Jeff

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