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- '''OpenGL extension EXT.polygon_offset
-
- Overview (from the spec)
-
- The depth values of fragments generated by rendering polygons are
- displaced by an amount that is proportional to the maximum absolute
- value of the depth slope of the polygon, measured and applied in window
- coordinates. This displacement allows lines (or points) and polygons
- in the same plane to be rendered without interaction -- the lines
- rendered either completely in front of or behind the polygons
- (depending on the sign of the offset factor). It also allows multiple
- coplanar polygons to be rendered without interaction, if different
- offset factors are used for each polygon. Applications include
- rendering hidden-line images, rendering solids with highlighted edges,
- and applying `decals' to surfaces.
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/EXT/polygon_offset.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_polygon_offset'
- GL_POLYGON_OFFSET_EXT = constant.Constant( 'GL_POLYGON_OFFSET_EXT', 0x8037 )
- glget.addGLGetConstant( GL_POLYGON_OFFSET_EXT, (1,) )
- GL_POLYGON_OFFSET_FACTOR_EXT = constant.Constant( 'GL_POLYGON_OFFSET_FACTOR_EXT', 0x8038 )
- glget.addGLGetConstant( GL_POLYGON_OFFSET_FACTOR_EXT, (1,) )
- GL_POLYGON_OFFSET_BIAS_EXT = constant.Constant( 'GL_POLYGON_OFFSET_BIAS_EXT', 0x8039 )
- glget.addGLGetConstant( GL_POLYGON_OFFSET_BIAS_EXT, (1,) )
- glPolygonOffsetEXT = platform.createExtensionFunction(
- 'glPolygonOffsetEXT', dll=platform.GL,
- extension=EXTENSION_NAME,
- resultType=None,
- argTypes=(constants.GLfloat, constants.GLfloat,),
- doc = 'glPolygonOffsetEXT( GLfloat(factor), GLfloat(bias) ) -> None',
- argNames = ('factor', 'bias',),
- )
-
-
- def glInitPolygonOffsetEXT():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-