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'''OpenGL extension EXT.stencil_two_side
Overview (from the spec)
This extension provides two-sided stencil testing where the
stencil-related state (stencil operations, reference value, compare
mask, and write mask) may be different for front- and back-facing
polygons. Two-sided stencil testing may improve the performance
of stenciled shadow volume and Constructive Solid Geometry (CSG)
rendering algorithms.
The official definition of this extension is available here:
http://oss.sgi.com/projects/ogl-sample/registry/EXT/stencil_two_side.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_EXT_stencil_two_side'
GL_STENCIL_TEST_TWO_SIDE_EXT = constant.Constant( 'GL_STENCIL_TEST_TWO_SIDE_EXT', 0x8910 )
glget.addGLGetConstant( GL_STENCIL_TEST_TWO_SIDE_EXT, (1,) )
GL_ACTIVE_STENCIL_FACE_EXT = constant.Constant( 'GL_ACTIVE_STENCIL_FACE_EXT', 0x8911 )
glget.addGLGetConstant( GL_ACTIVE_STENCIL_FACE_EXT, (1,) )
glActiveStencilFaceEXT = platform.createExtensionFunction(
'glActiveStencilFaceEXT', dll=platform.GL,
extension=EXTENSION_NAME,
resultType=None,
argTypes=(constants.GLenum,),
doc = 'glActiveStencilFaceEXT( GLenum(face) ) -> None',
argNames = ('face',),
)
def glInitStencilTwoSideEXT():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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