ID3D12PipelineState interface (d3d12.h)

Represents the state of all currently set shaders as well as certain fixed function state objects.

Inheritance

The ID3D12PipelineState interface inherits from ID3D12Pageable. ID3D12PipelineState also has these types of members:

Methods

The ID3D12PipelineState interface has these methods.

ID3D12PipelineState::GetCachedBlob Gets the cached blob representing the pipeline state.

Remarks

Use ID3D12Device::CreateGraphicsPipelineState or ID3D12Device::CreateComputePipelineState to create a pipeline state object (PSO).

A pipeline state object corresponds to a significant portion of the state of the graphics processing unit (GPU). This state includes all currently set shaders and certain fixed function state objects. The only way to change states contained within the pipeline object is to change the currently bound pipeline object.

Examples

The D3D12DynamicIndexing sample uses ID3D12PipelineState as follows:

Declare the pipeline objects.

// Asset objects.
ComPtr<ID3D12PipelineState> m_pipelineState;
ComPtr<ID3D12PipelineState> m_computeState;
ComPtr<ID3D12GraphicsCommandList> m_commandList;
ComPtr<ID3D12Resource> m_vertexBuffer;
ComPtr<ID3D12Resource> m_vertexBufferUpload;
D3D12_VERTEX_BUFFER_VIEW m_vertexBufferView;
ComPtr<ID3D12Resource> m_particleBuffer0[ThreadCount];
ComPtr<ID3D12Resource> m_particleBuffer1[ThreadCount];
ComPtr<ID3D12Resource> m_particleBuffer0Upload[ThreadCount];
ComPtr<ID3D12Resource> m_particleBuffer1Upload[ThreadCount];
ComPtr<ID3D12Resource> m_constantBufferGS;
UINT8* m_pConstantBufferGSData;
ComPtr<ID3D12Resource> m_constantBufferCS;

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());
}

The D3D12Bundles sample uses ID3D12PipelineState as follows:

Populating the command lists, note the alternating PSO.

void FrameResource::PopulateCommandList(ID3D12GraphicsCommandList* pCommandList, ID3D12PipelineState* pPso1, ID3D12PipelineState* pPso2,
    UINT frameResourceIndex, UINT numIndices, D3D12_INDEX_BUFFER_VIEW* pIndexBufferViewDesc, D3D12_VERTEX_BUFFER_VIEW* pVertexBufferViewDesc,
    ID3D12DescriptorHeap* pCbvSrvDescriptorHeap, UINT cbvSrvDescriptorSize, ID3D12DescriptorHeap* pSamplerDescriptorHeap, ID3D12RootSignature* pRootSignature)
{
    // If the root signature matches the root signature of the caller, then
    // bindings are inherited, otherwise the bind space is reset.
    pCommandList->SetGraphicsRootSignature(pRootSignature);

    ID3D12DescriptorHeap* ppHeaps[] = { pCbvSrvDescriptorHeap, pSamplerDescriptorHeap };
    pCommandList->SetDescriptorHeaps(_countof(ppHeaps), ppHeaps);
    pCommandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);

    pCommandList->IASetIndexBuffer(pIndexBufferViewDesc);

    pCommandList->IASetVertexBuffers(0, 1, pVertexBufferViewDesc);

    pCommandList->SetGraphicsRootDescriptorTable(0, pCbvSrvDescriptorHeap->GetGPUDescriptorHandleForHeapStart());
    pCommandList->SetGraphicsRootDescriptorTable(1, pSamplerDescriptorHeap->GetGPUDescriptorHandleForHeapStart());

    // Calculate the descriptor offset due to multiple frame resources.
    // 1 SRV + how many CBVs we have currently.
    UINT frameResourceDescriptorOffset = 1 + (frameResourceIndex * m_cityRowCount * m_cityColumnCount);
    CD3DX12_GPU_DESCRIPTOR_HANDLE cbvSrvHandle(pCbvSrvDescriptorHeap->GetGPUDescriptorHandleForHeapStart(), frameResourceDescriptorOffset, cbvSrvDescriptorSize);

    BOOL usePso1 = TRUE;
    for (UINT i = 0; i < m_cityRowCount; i++)
    {
        for (UINT j = 0; j < m_cityColumnCount; j++)
        {
            // Alternate which PSO to use; the pixel shader is different on 
            // each just as a PSO setting demonstration.
            pCommandList->SetPipelineState(usePso1 ? pPso1 : pPso2);
            usePso1 = !usePso1;

            // Set this city's CBV table and move to the next descriptor.
            pCommandList->SetGraphicsRootDescriptorTable(2, cbvSrvHandle);
            cbvSrvHandle.Offset(cbvSrvDescriptorSize);

            pCommandList->DrawIndexedInstanced(numIndices, 1, 0, 0, 0);
        }
    }
}

Refer to the Example Code in the D3D12 Reference.

Requirements

Requirement	Value
Target Platform	Windows
Header	d3d12.h

See also

Core Interfaces

ID3D12Pageable