defi - ps

Defines an integer constant value, which should be loaded any time a shader is set to a device.


defi dst, integerValue


  • dst is the destination register.
  • integerValue is a constant integer value.


Pixel shader versions 1_1 1_2 1_3 1_4 2_0 2_x 2_sw 3_0 3_sw
defi x x x x


The defi instruction defines a shader constant whose value is loaded anytime a shader is set to a device. These are called immediate constants. Immediate constants take precedence over constants set by the API method SetPixelShaderConstantB.

There are two ways to set a constant in a shader.

  1. Use defi to define the constant directly inside a shader.
  2. Use the API methods to set a constant.

Pixel Shader Instructions