| '''OpenGL extension EXT.GL_422_pixels |
| |
| This module customises the behaviour of the |
| OpenGL.raw.GL.EXT.GL_422_pixels to provide a more |
| Python-friendly API |
| |
| Overview (from the spec) |
| |
| This extension provides support for converting 422 pixels in host |
| memory to 444 pixels as part of the pixel storage operation. |
| |
| The pixel unpack storage operation treats a 422 pixel as a 2 element |
| format where the first element is C (chrominance) and the second |
| element is L (luminance). Luminance is present on all pixels; a full |
| chrominance value requires two pixels. |
| |
| The pixel pack storage operation converts RGB to a 422 pixel defined as |
| a 2 element format where the first element stored is C (chrominance) |
| and the second element stored is L (luminance). Luminance is present |
| on all pixels; a full chrominance value requires two pixels. |
| |
| Both averaging and non-averaging is supported for green and blue |
| assignments for pack and unpack operations. |
| |
| The official definition of this extension is available here: |
| http://www.opengl.org/registry/specs/EXT/GL_422_pixels.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.EXT.GL_422_pixels import * |
| from OpenGL.raw.GL.EXT.GL_422_pixels import _EXTENSION_NAME |
|
|
| def glInitGl422PixelsEXT(): |
| '''Return boolean indicating whether this extension is available''' |
| from OpenGL import extensions |
| return extensions.hasGLExtension( _EXTENSION_NAME ) |
|
|
|
|
| |
