Linux Certif

Toute la documentation sur la certification Linux LPI

ps_2_0.3Cg

NAME

ps_2_0 - Direct3D Shader Model 2.0 fragment profile for DirectX 9

SYNOPSIS

   ps_2_0
 
 
 

DESCRIPTION

This Direct3D profile corresponds to the per-fragment functionality introduced by GeForce FX (NV3x) for DirectX 9.

The compiler output for this profile conforms to the textual assembly defined by DirectX 9's Pixel Shader 2.0 shader format. See:

   http://msdn.microsoft.com/en-us/library/bb219843.aspx
 
 
 

3D API DEPENDENCIES

Requires Direct3D 9 support.

PROFILE OPTIONS

NumTemps=val

Number of 4-component vector temporaries the target implementation supports.

NumInstructionSlots=val

Number of instructions the target implementation supports.

MaxDrawBuffers=val

Number of draw buffers or Multiple Render Targets (MRT) the target implementation supports.

DATA TYPES

half

The half data type makes use of the Partial Precision instruction modifier to request less precision.

NVIDIA GPUs may use half-precision floating-point when the Partial Precision instruction modifier is specified. Half-precision floating-point is encoded with a sign bit, 10 mantissa bits, and 5 exponent bits (biased by 16), sometimes called s10e5.

float

The float data type corresponds to a floating-point representation with at least 24 bits.

NVIDIA GPUs supporting ps_2_0 use standard IEEE 754 single-precision floating-point encoding with a sign bit, 23 mantissa bits, and 8 exponent bits (biased by 128), sometimes called s10e5.

Older ATI GPUs use 24-bit floating-point.

fixed

The fixed data type is treated like half.

SEMANTICS

INPUT SEMANTICS

The varying input semantics in the ps_2_0 profile correspond to the respectively named varying output semantics of the vs_2_0 profile.

   Binding Semantics Name           Corresponding Data
 
 
 

   COLOR                            Input primary color
   COLOR0
   COL
   COL0
 
 
 

   COLOR1                           Input secondary color
   COL1
 
 
 

   TEX0                             Input texture coordinate sets 0
   TEXCOORD0
 
 
 

   TEX1                             Input texture coordinate sets 1
   TEXCOORD1
 
 
 

   TEX2                             Input texture coordinate sets 2
   TEXCOORD2
 
 
 

   TEX3                             Input texture coordinate sets 3
   TEXCOORD3
 
 
 

   TEX4                             Input texture coordinate sets 4
   TEXCOORD4
 
 
 

   TEX5                             Input texture coordinate sets 5
   TEXCOORD5
 
 
 

   TEX6                             Input texture coordinate sets 6
   TEXCOORD6
 
 
 

   TEX7                             Input texture coordinate sets 7
   TEXCOORD7
 
 
 

   FOGP                             Input fog color (XYZ) and factor (W)
   FOG
 
 
 

UNIFORM INPUT SEMANTICS

Sixteen texture units are supported:

   Binding Semantic Name            Corresponding Data
 
 
 

   TEXUNIT0                         Texture unit 0
   TEXUNIT1                         Texture unit 1
   ...
   TEXUNIT15                        Texture unit 15
 
 
 

OUTPUT SEMANTICS

   COLOR                            Output color (float4)
   COLOR0
   COL0
   COL
 
 
 

   DEPTH                            Output depth (float)
   DEPR
 
 
 

STANDARD LIBRARY ISSUES

Functions that compute partial derivatives are not supported.

This profile may have limits on the number of dependent texture fetches.

SEE ALSO

vs_2_0, ps_2_x