'''OpenGL extension EXT.blend_subtract
This module customises the behaviour of the
OpenGL.raw.GL.EXT.blend_subtract to provide a more
Python-friendly API
Overview (from thespec import
Two additional blending equations are specified using the interface
defined by EXT_blend_minmax. These equations are similar to the
default blending equation, but produce the difference of its left
and right hand sides, rather than the sum. Image differences are
useful in many image processing applications.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/EXT/blend_subtract.txt
'''
from OpenGL import platform,constants,constant,arrays
from OpenGL import extensions,wrapper
from OpenGL.GL import glget
import ctypes
from OpenGL.raw.GL.EXT.blend_subtract import *
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