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- '''OpenGL extension MESA.ycbcr_texture
-
- 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://oss.sgi.com/projects/ogl-sample/registry/MESA/ycbcr_texture.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_ycbcr_texture'
- GL_UNSIGNED_SHORT_8_8_MESA = constant.Constant( 'GL_UNSIGNED_SHORT_8_8_MESA', 0x85BA )
- GL_UNSIGNED_SHORT_8_8_REV_MESA = constant.Constant( 'GL_UNSIGNED_SHORT_8_8_REV_MESA', 0x85BB )
- GL_YCBCR_MESA = constant.Constant( 'GL_YCBCR_MESA', 0x8757 )
-
-
- def glInitYcbcrTextureMESA():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-