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- '''OpenGL extension EXT.stencil_wrap
-
- Overview (from the spec)
-
- Various algorithms use the stencil buffer to "count" the number of
- surfaces that a ray passes through. As the ray passes into an object,
- the stencil buffer is incremented. As the ray passes out of an object,
- the stencil buffer is decremented.
-
- GL requires that the stencil increment operation clamps to its maximum
- value. For algorithms that depend on the difference between the sum
- of the increments and the sum of the decrements, clamping causes an
- erroneous result.
-
- This extension provides an enable for both maximum and minimum wrapping
- of stencil values. Instead, the stencil value wraps in both directions.
-
- Two additional stencil operations are specified. These new operations
- are similiar to the existing INCR and DECR operations, but they wrap
- their result instead of saturating it. This functionality matches
- the new stencil operations introduced by DirectX 6.
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/EXT/stencil_wrap.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_wrap'
- GL_INCR_WRAP_EXT = constant.Constant( 'GL_INCR_WRAP_EXT', 0x8507 )
- GL_DECR_WRAP_EXT = constant.Constant( 'GL_DECR_WRAP_EXT', 0x8508 )
-
-
- def glInitStencilWrapEXT():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-