How To: Create a Domain Shader

A domain shader is the third of three stages that work together to implement tessellation. The inputs for the domain-shader stage come from a hull shader. This topic shows how to create a domain shader.

A domain shader transforms surface geometry (created by the fixed-function tessellator stage) using hull shader output-control points, hull shader output patch-constant data, and a single set of tessellator uv coordinates.

To create a domain shader

1. Design a domain shader. See How To: Design a Domain Shader.
2. Compile the shader code.
3. Create a domain-shader object using ID3D11Device::CreateDomainShader.
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   HRESULT CreateDomainShader(
     const void *pShaderBytecode, // 
     SIZE_T BytecodeLength, // 
     ID3D11ClassLinkage *pClassLinkage, // 
     ID3D11DomainShader **ppDomainShader
   );
   
   
   

4. Initialize the pipeline stage using ID3D11DeviceContext::DSSetShader.
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   void DSSetShader(
     ID3D11DomainShader *pDomainShader, // 
     ID3D11ClassInstance *const *ppClassInstances,
     UINT NumClassInstances
   );
   
   
   

A domain shader must be bound to the pipeline if a hull shader is bound. In particular, it is not valid to directly stream out hull shader control points with the geometry shader.

Related topics

Tessellation Overview

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Build date: 11/28/2012