Registers - ps_2_0

Pixel shaders depend on registers to get vertex data, to output pixel data to the rasterizer, to hold temporary results during calculations and to identify texture sampling stages. There are several types of registers, each with a unique functionality. This section contains reference information for the input and output registers implemented by pixel shader version 2_0.

Input Register Types

Register	Name	Description	New
v0, v1	Color Register	Contains interpolated vertex data.	No
c0 to c31	Constant Float Register	Contains constants used by the shader.	Yes
t0 to t7	Input Texture Coordinate Register	Contains interpolated texture coordinates.	No
s0 to s15	Sampler Register	Identifies a texture sampling stage.	Yes
r0 to r11	Temporary Register	Holds intermediate results.	No

Output Register Types

Register	Name	Description	New
oC0, oC1, oC2, oC3	Output Color Register	Each register represents a different texture element.	Yes
oDepth	Output Depth Register	The register contains a depth value.	Yes