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ID3D12RootSignature interface

The root signature defines what resources are bound to the graphics pipeline. A root signature is configured by the app and links command lists to the resources the shaders require. Currently, there is one graphics and one compute root signature per app.

Members

The ID3D12RootSignature interface inherits from ID3D12DeviceChild but does not have additional members.

Examples

The D3D12DynamicIndexing sample uses ID3D12RootSignature as follows:

Declare the pipeline objects.


// Pipeline objects.
D3D12_VIEWPORT m_viewport;
ComPtr<IDXGISwapChain3> m_swapChain;
ComPtr<ID3D11DeviceContext> m_d3d11DeviceContext;
ComPtr<ID3D11On12Device> m_d3d11On12Device;
ComPtr<ID3D12Device> m_d3d12Device;
ComPtr<IDWriteFactory> m_dWriteFactory;
ComPtr<ID2D1Factory3> m_d2dFactory;
ComPtr<ID2D1Device2> m_d2dDevice;
ComPtr<ID2D1DeviceContext2> m_d2dDeviceContext;
ComPtr<ID3D12Resource> m_renderTargets[FrameCount];
ComPtr<ID3D11Resource> m_wrappedBackBuffers[FrameCount];
ComPtr<ID2D1Bitmap1> m_d2dRenderTargets[FrameCount];
ComPtr<ID3D12CommandAllocator> m_commandAllocators[FrameCount];
ComPtr<ID3D12CommandQueue> m_commandQueue;
ComPtr<ID3D12RootSignature> m_rootSignature;
ComPtr<ID3D12DescriptorHeap> m_rtvHeap;
ComPtr<ID3D12PipelineState> m_pipelineState;
ComPtr<ID3D12GraphicsCommandList> m_commandList;
D3D12_RECT m_scissorRect;


Initializing a bundle.


void FrameResource::InitBundle(ID3D12Device* pDevice, ID3D12PipelineState* pPso,
    UINT frameResourceIndex, UINT numIndices, D3D12_INDEX_BUFFER_VIEW* pIndexBufferViewDesc, D3D12_VERTEX_BUFFER_VIEW* pVertexBufferViewDesc,
    ID3D12DescriptorHeap* pCbvSrvDescriptorHeap, UINT cbvSrvDescriptorSize, ID3D12DescriptorHeap* pSamplerDescriptorHeap, ID3D12RootSignature* pRootSignature)
{
    ThrowIfFailed(pDevice->CreateCommandList(0, D3D12_COMMAND_LIST_TYPE_BUNDLE, m_bundleAllocator.Get(), pPso, IID_PPV_ARGS(&m_bundle)));

    PopulateCommandList(m_bundle.Get(), pPso, frameResourceIndex, numIndices, pIndexBufferViewDesc,
        pVertexBufferViewDesc, pCbvSrvDescriptorHeap, cbvSrvDescriptorSize, pSamplerDescriptorHeap, pRootSignature);

    ThrowIfFailed(m_bundle->Close());
}


Refer to the Example Code in the D3D12 Reference.

Requirements

Header

D3D12.h

Library

D3D12.lib

DLL

D3D12.dll

See also

ID3D12DeviceChild
Core Interfaces
Root Signatures

 

 

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