Metodo ID3D12GraphicsCommandList::RSSetScissorRects (d3d12.h)

Associa una matrice di rettangoli scissor alla fase rasterizer.

Sintassi

void RSSetScissorRects(
  [in] UINT             NumRects,
  [in] const D3D12_RECT *pRects
);

Parametri

[in] NumRects

Tipo: UINT

Numero di rettangoli scissor da associare.

[in] pRects

Tipo: const D3D12_RECT*

Matrice di rettangoli scissor.

Valore restituito

nessuno

Osservazioni

Tutti i rettangoli scissor devono essere impostati atomicamente come un'unica operazione. Tutti i rettangoli scissor non definiti dalla chiamata sono disabilitati.

Quale rettangolo di scissor da usare è determinato dall'output semantico da un geometry shader (vedere sintassi SV_ViewportArrayIndex semantica shader). Se uno shader geometry non usa la SV_ViewportArrayIndex semantica, Direct3D userà il primo rettangolo scissor nella matrice.

Ogni rettangolo scissor nella matrice corrisponde a un viewport in una matrice di viewport (vedere RSSetViewports).

Esempio

L'esempio D3D12HelloTriangle usa ID3D12GraphicsCommandList::RSSetScissorRects come indicato di seguito:

D3D12_VIEWPORT m_viewport;
D3D12_RECT m_scissorRect;
ComPtr<IDXGISwapChain3> m_swapChain;
ComPtr<ID3D12Device> m_device;
ComPtr<ID3D12Resource> m_renderTargets[FrameCount];
ComPtr<ID3D12CommandAllocator> m_commandAllocator;
ComPtr<ID3D12CommandQueue> m_commandQueue;
ComPtr<ID3D12RootSignature> m_rootSignature;
ComPtr<ID3D12DescriptorHeap> m_rtvHeap;
ComPtr<ID3D12PipelineState> m_pipelineState;
ComPtr<ID3D12GraphicsCommandList> m_commandList;
UINT m_rtvDescriptorSize;

// Command list allocators can only be reset when the associated 
// command lists have finished execution on the GPU; apps should use 
// fences to determine GPU execution progress.
ThrowIfFailed(m_commandAllocator->Reset());

// However, when ExecuteCommandList() is called on a particular command 
// list, that command list can then be reset at any time and must be before 
// re-recording.
ThrowIfFailed(m_commandList->Reset(m_commandAllocator.Get(), m_pipelineState.Get()));

// Set necessary state.
m_commandList->SetGraphicsRootSignature(m_rootSignature.Get());
m_commandList->RSSetViewports(1, &m_viewport);
m_commandList->RSSetScissorRects(1, &m_scissorRect);

// Indicate that the back buffer will be used as a render target.
m_commandList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(m_renderTargets[m_frameIndex].Get(), D3D12_RESOURCE_STATE_PRESENT, D3D12_RESOURCE_STATE_RENDER_TARGET));

CD3DX12_CPU_DESCRIPTOR_HANDLE rtvHandle(m_rtvHeap->GetCPUDescriptorHandleForHeapStart(), m_frameIndex, m_rtvDescriptorSize);
m_commandList->OMSetRenderTargets(1, &rtvHandle, FALSE, nullptr);

// Record commands.
const float clearColor[] = { 0.0f, 0.2f, 0.4f, 1.0f };
m_commandList->ClearRenderTargetView(rtvHandle, clearColor, 0, nullptr);
m_commandList->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLELIST);
m_commandList->IASetVertexBuffers(0, 1, &m_vertexBufferView);
m_commandList->DrawInstanced(3, 1, 0, 0);

// Indicate that the back buffer will now be used to present.
m_commandList->ResourceBarrier(1, &CD3DX12_RESOURCE_BARRIER::Transition(m_renderTargets[m_frameIndex].Get(), D3D12_RESOURCE_STATE_RENDER_TARGET, D3D12_RESOURCE_STATE_PRESENT));

ThrowIfFailed(m_commandList->Close());

Vedere Codice di esempio nel riferimento D3D12.

Requisiti

Vedi anche

ID3D12GraphicsCommandList