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'''OpenGL extension NV.texture_env_combine4
This module customises the behaviour of the
OpenGL.raw.GL.NV.texture_env_combine4 to provide a more
Python-friendly API
Overview (from the spec)
New texture environment function COMBINE4_NV allows programmable
texture combiner operations, including
ADD Arg0 * Arg1 + Arg2 * Arg3
ADD_SIGNED_EXT Arg0 * Arg1 + Arg2 * Arg3 - 0.5
where Arg0, Arg1, Arg2 and Arg3 are derived from
ZERO the value 0
PRIMARY_COLOR_EXT primary color of incoming fragment
TEXTURE texture color of corresponding texture unit
CONSTANT_EXT texture environment constant color
PREVIOUS_EXT result of previous texture environment; on
texture unit 0, this maps to PRIMARY_COLOR_EXT
TEXTURE<n>_ARB texture color of the <n>th texture unit
In addition, the result may be scaled by 1.0, 2.0 or 4.0.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NV/texture_env_combine4.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GL import _types, _glgets
from OpenGL.raw.GL.NV.texture_env_combine4 import *
from OpenGL.raw.GL.NV.texture_env_combine4 import _EXTENSION_NAME
def glInitTextureEnvCombine4NV():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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