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'''OpenGL extension EXT.blend_minmax
Overview (from the spec)
Blending capability is extended by respecifying the entire blend
equation. While this document defines only two new equations, the
BlendEquationEXT procedure that it defines will be used by subsequent
extensions to define additional blending equations.
The two new equations defined by this extension produce the minimum
(or maximum) color components of the source and destination colors.
Taking the maximum is useful for applications such as maximum projection
in medical imaging.
The official definition of this extension is available here:
http://oss.sgi.com/projects/ogl-sample/registry/EXT/blend_minmax.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_blend_minmax'
GL_FUNC_ADD_EXT = constant.Constant( 'GL_FUNC_ADD_EXT', 0x8006 )
GL_MIN_EXT = constant.Constant( 'GL_MIN_EXT', 0x8007 )
GL_MAX_EXT = constant.Constant( 'GL_MAX_EXT', 0x8008 )
GL_BLEND_EQUATION_EXT = constant.Constant( 'GL_BLEND_EQUATION_EXT', 0x8009 )
glget.addGLGetConstant( GL_BLEND_EQUATION_EXT, (1,) )
glBlendEquationEXT = platform.createExtensionFunction(
'glBlendEquationEXT', dll=platform.GL,
extension=EXTENSION_NAME,
resultType=None,
argTypes=(constants.GLenum,),
doc = 'glBlendEquationEXT( GLenum(mode) ) -> None',
argNames = ('mode',),
)
def glInitBlendMinmaxEXT():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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