ID3D12GraphicsCommandList：：RSSetScissorRects 方法 (d3d12.h)

将剪刀矩形数组绑定到光栅器阶段。

语法

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

参数

[in] NumRects

类型： UINT

要绑定的剪刀矩形数。

[in] pRects

类型： const D3D12_RECT*

剪刀矩形数组。

返回值

无

备注

所有剪刀矩形都必须以原子方式设置为一个操作。 将禁用调用未定义的任何剪刀矩形。

要使用的剪刀矩形由 SV_ViewportArrayIndex 几何着色器的语义输出决定， (查看着色器语义语法) 。 如果几何着色器未使用语义， SV_ViewportArrayIndex 则 Direct3D 将使用数组中的第一个剪刀矩形。

数组中的每个剪刀矩形对应于视区数组中的一个视区 (请参阅 RSSetViewports) 。

示例

D3D12HelloTriangle 示例使用 ID3D12GraphicsCommandList：：RSSetScissorRects，如下所示：

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());

请参阅 D3D12 参考中的示例代码。

要求

要求	值
目标平台	Windows
标头	d3d12.h
Library	D3d12.lib
DLL	D3d12.dll

另请参阅

ID3D12GraphicsCommandList