OpenGL extension NV.fragment_program2
This module customises the behaviour of the
OpenGL.raw.GL.NV.fragment_program2 to provide a more
Overview (from the spec)
This extension, like the NV_fragment_program_option extension, provides
additional fragment program functionality to extend the standard
ARB_fragment_program language and execution environment. ARB programs
wishing to use this added functionality need only add:
to the beginning of their fragment programs.
New functionality provided by this extension, above and beyond that
already provided by the NV_fragment_program_option extension, includes:
* structured branching support, including data-dependent IF tests, loops
supporting a fixed number of iterations, and a data-dependent loop
exit instruction (BRK),
* subroutine calls,
* instructions to perform vector normalization, divide vector components
by a scalar, and perform two-component dot products (with or without a
* an instruction to perform a texture lookup with an explicit LOD,
* a loop index register for indirect access into the texture coordinate
attribute array, and
* a facing attribute that indicates whether the fragment is generated
from a front- or back-facing primitive.
The official definition of this extension is available here:
|EXTENSION_NAME = 'GL_NV_fragment_program2'|
GL_MAX_PROGRAM_CALL_DEPTH_NV = GL_MAX_PROGRAM_CALL_DEPTH_NV
GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV = GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV
GL_MAX_PROGRAM_IF_DEPTH_NV = GL_MAX_PROGRAM_IF_DEPTH_NV
GL_MAX_PROGRAM_LOOP_COUNT_NV = GL_MAX_PROGRAM_LOOP_COUNT_NV
GL_MAX_PROGRAM_LOOP_DEPTH_NV = GL_MAX_PROGRAM_LOOP_DEPTH_NV
__file__ = '/home/mcfletch/pylive/OpenGL/GL/NV/fragment_program2.pyc'
__name__ = 'OpenGL.GL.NV.fragment_program2'
__package__ = 'OpenGL.GL.NV'