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- '''OpenGL extension EXT.cmyka
-
- Overview (from the spec)
-
- This extension provides a simple method for OpenGL to read and store
- images whose pixels have CMYK or CMYKA formats. The algorithms used to
- convert to RGBA from CMYKA and to convert back from RGBA to CMYKA are of
- the "black-box" nature, meaning that the application has little control
- over how the conversion is done. Also, this black-box mechanism is
- available only for transfers to or from memory, not for internal copies
- of pixel data (such as invoked by CopyPixels, CopyTexImage1D, etc.)
- However, the defined mechanism nicely handles 5-component CMYKA images,
- and it is very easy to use.
-
- A more configurable and potentially higher quality color conversion can
- be implemented using the color tables, the color matrix, and possibly 3D
- and 4D texture lookup. Such a color conversion also applies to copied
- pixel data.
-
- The official definition of this extension is available here:
- http://oss.sgi.com/projects/ogl-sample/registry/EXT/cmyka.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_EXT_cmyka'
- GL_CMYK_EXT = constant.Constant( 'GL_CMYK_EXT', 0x800C )
- GL_CMYKA_EXT = constant.Constant( 'GL_CMYKA_EXT', 0x800D )
- GL_PACK_CMYK_HINT_EXT = constant.Constant( 'GL_PACK_CMYK_HINT_EXT', 0x800E )
- glget.addGLGetConstant( GL_PACK_CMYK_HINT_EXT, (1,) )
- GL_UNPACK_CMYK_HINT_EXT = constant.Constant( 'GL_UNPACK_CMYK_HINT_EXT', 0x800F )
- glget.addGLGetConstant( GL_UNPACK_CMYK_HINT_EXT, (1,) )
-
-
- def glInitCmykaEXT():
- '''Return boolean indicating whether this extension is available'''
- return extensions.hasGLExtension( EXTENSION_NAME )
-