'''OpenGL extension SGIX.shadow
This module customises the behaviour of the
OpenGL.raw.GL.SGIX.shadow to provide a more
Python-friendly API
Overview (from the spec)
This extension defines two new operations to be performed on texture
values before they are passed on to the filtering subsystem. These
operations perform either a <= or >= test on the value from texture
memory and the iterated R value, and return 1.0 or 0.0 if the test
passes or fails, respectively.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/SGIX/shadow.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.SGIX.shadow import *
from OpenGL.raw.GL.SGIX.shadow import _EXTENSION_NAME
def glInitShadowSGIX():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
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xuebingbing authoredff650909