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'''OpenGL extension NV.fragment_program2
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:
OPTION NV_fragment_program2;
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
scalar add),
* 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:
http://oss.sgi.com/projects/ogl-sample/registry/NV/fragment_program2.txt
Automatically generated by the get_gl_extensions script, do not edit!
'''
from OpenGL import platform, constants, constant, arrays
from OpenGL import extensions
from OpenGL.GL import glget
import ctypes
EXTENSION_NAME = 'GL_NV_fragment_program2'
GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV = constant.Constant( 'GL_MAX_PROGRAM_EXEC_INSTRUCTIONS_NV', 0x88F4 )
GL_MAX_PROGRAM_CALL_DEPTH_NV = constant.Constant( 'GL_MAX_PROGRAM_CALL_DEPTH_NV', 0x88F5 )
GL_MAX_PROGRAM_IF_DEPTH_NV = constant.Constant( 'GL_MAX_PROGRAM_IF_DEPTH_NV', 0x88F6 )
GL_MAX_PROGRAM_LOOP_DEPTH_NV = constant.Constant( 'GL_MAX_PROGRAM_LOOP_DEPTH_NV', 0x88F7 )
GL_MAX_PROGRAM_LOOP_COUNT_NV = constant.Constant( 'GL_MAX_PROGRAM_LOOP_COUNT_NV', 0x88F8 )
def glInitFragmentProgram2NV():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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