| | '''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 ) |
| |
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| |
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| | |
