inline HRESULT D3DX12ParsePipelineStream()

in Python/src/d3dx12.h [2533:2664]
129 lines of code
30 McCabe index (conditional complexity)

inline HRESULT D3DX12ParsePipelineStream(const D3D12_PIPELINE_STATE_STREAM_DESC& Desc, ID3DX12PipelineParserCallbacks* pCallbacks)
{
    if (pCallbacks == nullptr)
    {
        return E_INVALIDARG;
    }

    if (Desc.SizeInBytes == 0 || Desc.pPipelineStateSubobjectStream == nullptr)
    {
        pCallbacks->ErrorBadInputParameter(1); // first parameter issue
        return E_INVALIDARG;
    }

    bool SubobjectSeen[D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_MAX_VALID] = {};
    for (SIZE_T CurOffset = 0, SizeOfSubobject = 0; CurOffset < Desc.SizeInBytes; CurOffset += SizeOfSubobject)
    {
        BYTE* pStream = static_cast<BYTE*>(Desc.pPipelineStateSubobjectStream) + CurOffset;
        auto SubobjectType = *reinterpret_cast<D3D12_PIPELINE_STATE_SUBOBJECT_TYPE*>(pStream);
        if (SubobjectType < 0 || SubobjectType >= D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_MAX_VALID)
        {
            pCallbacks->ErrorUnknownSubobject(SubobjectType);
            return E_INVALIDARG;
        }
        if (SubobjectSeen[D3DX12GetBaseSubobjectType(SubobjectType)])
        {
            pCallbacks->ErrorDuplicateSubobject(SubobjectType);
            return E_INVALIDARG; // disallow subobject duplicates in a stream
        }
        SubobjectSeen[SubobjectType] = true;
        switch (SubobjectType)
        {
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_ROOT_SIGNATURE:
            pCallbacks->RootSignatureCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::pRootSignature)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::pRootSignature);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_VS:
            pCallbacks->VSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::VS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::VS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_PS:
            pCallbacks->PSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::PS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::PS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_DS:
            pCallbacks->DSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::DS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::DS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_HS:
            pCallbacks->HSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::HS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::HS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_GS:
            pCallbacks->GSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::GS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::GS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_CS:
            pCallbacks->CSCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::CS)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::CS);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_STREAM_OUTPUT:
            pCallbacks->StreamOutputCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::StreamOutput)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::StreamOutput);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_BLEND:
            pCallbacks->BlendStateCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::BlendState)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::BlendState);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_SAMPLE_MASK:
            pCallbacks->SampleMaskCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::SampleMask)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::SampleMask);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_RASTERIZER:
            pCallbacks->RasterizerStateCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::RasterizerState)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::RasterizerState);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_DEPTH_STENCIL:
            pCallbacks->DepthStencilStateCb(*reinterpret_cast<CD3DX12_PIPELINE_STATE_STREAM_DEPTH_STENCIL*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM_DEPTH_STENCIL);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_DEPTH_STENCIL1:
            pCallbacks->DepthStencilState1Cb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::DepthStencilState)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::DepthStencilState);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_INPUT_LAYOUT:
            pCallbacks->InputLayoutCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::InputLayout)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::InputLayout);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_IB_STRIP_CUT_VALUE:
            pCallbacks->IBStripCutValueCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::IBStripCutValue)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::IBStripCutValue);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_PRIMITIVE_TOPOLOGY:
            pCallbacks->PrimitiveTopologyTypeCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::PrimitiveTopologyType)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::PrimitiveTopologyType);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_RENDER_TARGET_FORMATS:
            pCallbacks->RTVFormatsCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::RTVFormats)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::RTVFormats);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_DEPTH_STENCIL_FORMAT:
            pCallbacks->DSVFormatCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::DSVFormat)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::DSVFormat);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_SAMPLE_DESC:
            pCallbacks->SampleDescCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::SampleDesc)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::SampleDesc);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_NODE_MASK:
            pCallbacks->NodeMaskCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::NodeMask)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::NodeMask);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_CACHED_PSO:
            pCallbacks->CachedPSOCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::CachedPSO)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::CachedPSO);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_FLAGS:
            pCallbacks->FlagsCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM::Flags)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM::Flags);
            break;
        case D3D12_PIPELINE_STATE_SUBOBJECT_TYPE_VIEW_INSTANCING:
            pCallbacks->ViewInstancingCb(*reinterpret_cast<decltype(CD3DX12_PIPELINE_STATE_STREAM1::ViewInstancingDesc)*>(pStream));
            SizeOfSubobject = sizeof(CD3DX12_PIPELINE_STATE_STREAM1::ViewInstancingDesc);
            break;
        default:
            pCallbacks->ErrorUnknownSubobject(SubobjectType);
            return E_INVALIDARG;
            break;
        }
    }

    return S_OK;
}