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'''OpenGL extension MESA.pack_invert
Overview (from the spec)
This extension adds a new pixel storage parameter to indicate that
images are to be packed in top-to-bottom order instead of OpenGL's
conventional bottom-to-top order. Only pixel packing can be
inverted (i.e. for glReadPixels, glGetTexImage, glGetConvolutionFilter,
etc).
Almost all known image file formats store images in top-to-bottom
order. As it is, OpenGL reads images from the frame buffer in
bottom-to-top order. Thus, images usually have to be inverted before
writing them to a file with image I/O libraries. This extension
allows images to be read such that inverting isn't needed.
The official definition of this extension is available here:
http://oss.sgi.com/projects/ogl-sample/registry/MESA/pack_invert.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_MESA_pack_invert'
GL_PACK_INVERT_MESA = constant.Constant( 'GL_PACK_INVERT_MESA', 0x8758 )
glget.addGLGetConstant( GL_PACK_INVERT_MESA, (1,) )
def glInitPackInvertMESA():
'''Return boolean indicating whether this extension is available'''
return extensions.hasGLExtension( EXTENSION_NAME )
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