File: read_depth_stencil.py

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'''OpenGL extension NV.read_depth_stencil

This module customises the behaviour of the 
OpenGL.raw.GLES2.NV.read_depth_stencil to provide a more 
Python-friendly API

Overview (from the spec)
	
	Unextended OpenGL-ES 2.0 only supports using ReadPixels to read from the
	default color buffer of the currently-bound framebuffer.  However, it is
	useful for debugging to be able to read from depth and stencil buffers.
	This extension re-introduces these features into OpenGL-ES 2.0.
	
	This document describes several extensions in order to allow an
	implementation to support a subset of the total functionality.
	
	The NV_read_depth extension allows reading from the depth buffer using
	ReadPixels.
	
	The NV_read_stencil extension allows reading from the stencil buffer using
	ReadPixels.
	
	The NV_read_depth_stencil extension allows reading from packed
	depth-stencil buffers using ReadPixels.
	

The official definition of this extension is available here:
http://www.opengl.org/registry/specs/NV/read_depth_stencil.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GLES2 import _types, _glgets
from OpenGL.raw.GLES2.NV.read_depth_stencil import *
from OpenGL.raw.GLES2.NV.read_depth_stencil import _EXTENSION_NAME

def glInitReadDepthStencilNV():
    '''Return boolean indicating whether this extension is available'''
    from OpenGL import extensions
    return extensions.hasGLExtension( _EXTENSION_NAME )


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