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'''OpenGL extension OES.blend_subtract
This module customises the behaviour of the
OpenGL.raw.GLES1.OES.blend_subtract to provide a more
Python-friendly API
Overview (from the spec)
Blending capability is extended by respecifying the entire blend
equation. While this document defines only two new equations, the
BlendEquationOES procedure that it defines will be used by subsequent
extensions to define additional blending equations.
In addition to the default blending equation, two new blending equations
are specified. 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/OES/blend_subtract.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GLES1 import _types, _glgets
from OpenGL.raw.GLES1.OES.blend_subtract import *
from OpenGL.raw.GLES1.OES.blend_subtract import _EXTENSION_NAME
def glInitBlendSubtractOES():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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