dcl_inputPrimitive (sm4 - asm)

Declares the primitive type for geometry-shader inputs.

dcl_inputPrimitive type




[in] Input-data primitive type, which is one of the following:

  • point - point list
  • line - line list
  • triangle - triangle list
  • line_adj - line list with adjacency data
  • triangle_adj - triangle list with adjacency data


This instruction applies to the following shader stages:

Vertex ShaderGeometry ShaderPixel Shader


This instruction is included to aid in debugging a shader in assembly; you cannot author a shader in assembly language using Shader Model 4.


Here is an example.

dcl_inputPrimitive triangle

Minimum Shader Model

This function is supported in the following shader models.

Shader ModelSupported
Shader Model 5 yes
Shader Model 4.1 yes
Shader Model 4 yes
Shader Model 3 (DirectX HLSL) no
Shader Model 2 (DirectX HLSL) no
Shader Model 1 (DirectX HLSL) no


Related topics

Shader Model 4 Assembly (DirectX HLSL)