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'''OpenGL extension SGIX.ycrcba
This module customises the behaviour of the
OpenGL.raw.GL.SGIX.ycrcba to provide a more
Python-friendly API
Overview (from the spec)
This extension provides a method for OpenGL to read and store
images that are defined in standard YCRCB and YCRCBA video color
spaces. As with the CYMK extension, conversion to RGBA takes place
immediately following the unpack pixel store, and preceding the
pack pixel store operations, and is only available on transfers to
and from memory. The algorithms that convert between YCRCB and
RGBA are "black-box" in nature, and left undefined by the
extension, however it is recommended that conversion comply with
the CCIR standard. This extension specifies the format of a pixel
rectangle independent of component subsampling. Component
subsampling is specified using a separate extension.
Two new formats are added, YCRCB_SGIX and YCRCBA_SGIX.
YCRCB_SGIX is defined as a 3 component format representing the Cb,
Y, and Cr values per pixel. YCRCBA_SGIX is defined as a 4 component
format representing Cb, Y, Cr, and A values per pixel.
As with the CMYK extension, this extension doesn't preclude the
possibility of other higher quality conversion methods.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/SGIX/ycrcba.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GL import _types, _glgets
from OpenGL.raw.GL.SGIX.ycrcba import *
from OpenGL.raw.GL.SGIX.ycrcba import _EXTENSION_NAME
def glInitYcrcbaSGIX():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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