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texreg2ar - ps

  • Article

Interprets the alpha and red color components of the source register as texture address data (u,v) to sample the texture at the stage corresponding to the destination register number. The result is stored in the destination register.

Syntax

texreg2ar dst, src

 

where

  • dst is the destination register.
  • src is a source register.

Remarks

Pixel shader versions 1_1 1_2 1_3 1_4 2_0 2_x 2_sw 3_0 3_sw
texreg2ar x x x

 

This instruction is useful for color-space remapping operations.

Here is an example of the sequence the instruction follows:

tex t(n) texreg2ar t(m), t(n) where m > n // The first instruction loads the texture color (RGBA) // into register tn tex tn // The second instruction remaps the color t(m)RGBA = TextureSample(stage m)RGBA using t(n)AR as coordinates

_bx2 cannot be used on the src register for texreg2ar or texreg2gb - ps instructions.

For this instruction, the source register must use unsigned data. Use of signed or mixed data in the source register will produce undefined results. For more information, see D3DFORMAT.

Pixel Shader Instructions