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'''OpenGL extension MESA.ycbcr_texture
This module customises the behaviour of the
OpenGL.raw.GL.MESA.ycbcr_texture to provide a more
Python-friendly API
Overview (from the spec)
This extension supports texture images stored in the YCbCr format.
There is no support for converting YCbCr images to RGB or vice versa
during pixel transfer. The texture's YCbCr colors are converted to
RGB during texture sampling, after-which, all the usual per-fragment
operations take place. Only 2D texture images are supported (not
glDrawPixels, glReadPixels, etc).
A YCbCr pixel (texel) is a 16-bit unsigned short with two components.
The first component is luminance (Y). For pixels in even-numbered
image columns, the second component is Cb. For pixels in odd-numbered
image columns, the second component is Cr. If one were to convert the
data to RGB one would need to examine two pixels from columns N and N+1
(where N is even) to deduce the RGB color.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/MESA/ycbcr_texture.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.MESA.ycbcr_texture import *
from OpenGL.raw.GL.MESA.ycbcr_texture import _EXTENSION_NAME
def glInitYcbcrTextureMESA():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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