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fp40.3Cg
Langue: en
Version: Cg Toolkit 3.0 (ubuntu - 24/10/10)
Section: 3 (Bibliothèques de fonctions)
Sommaire
NAME
fp40 - OpenGL fragment profile for NVIDIA GeForce 6/7 Series, NV4x-based Quadro FXSYNOPSIS
fp40
DESCRIPTION
This OpenGL profile corresponds to the per-fragment functionality introduced by the GeForce 6800 and other NV4x-based NVIDIA GPUs.The compiler output for this profile conforms to the assembly format defined by NV_fragment_program2.
Data-dependent loops are allowed with a limit of 256 iterations maximum. Four levels of nesting are allowed.
Conditional expressions can be supported with data-dependent branching.
Relative indexing of uniform arrays is not supported; use texture accesses instead.
3D API DEPENDENCIES
Requires OpenGL support for the NV_fragment_program2 extension. These extensions were introduced by the GeForce 6800 and other NV4x-based GPUs.OpenGL Extension Specifications
http://www.opengl.org/registry/specs/NV/fragment_program2.txt
PROFILE OPTIONS
None.DATA TYPES
- fixed
- The fixed data type corresponds to a native signed fixed-point integers with the range [-2.0,+2.0), sometimes called fx12. This type provides 10 fractional bits of precision.
- half
- The half data type corresponds to a floating-point encoding with a sign bit, 10 mantissa bits, and 5 exponent bits (biased by 16), sometimes called s10e5.
- float
- The half data type corresponds to a 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.
SEMANTICS
VARYING INPUT SEMANTICS
The varying input semantics in the fp40 profile correspond to the respectively named varying output semantics of the vp40 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 FACE Polygon facing. +1 for front-facing polygon or line or point -1 for back-facing polygon
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 supported.SEE ALSO
vp40Contenus ©2006-2024 Benjamin Poulain
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