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'''OpenGL extension SGI.video_sync
This module customises the behaviour of the
OpenGL.raw.GLX.SGI.video_sync to provide a more
Python-friendly API
Overview (from the spec)
This extension provides a means for synchronization with the video
frame rate of a monitor. (In the case of an interlaced monitor,
this is typically the rate of displaying both the even and odd
fields of a frame.) The kernel maintains a video sync counter for
each physical hardware pipe in a system; the counter is incremented
upon the completion of the display of each full frame of video data. An
OpenGL context always corresponds to a pipe. When an OpenGL process
has a current context, it can put itself to sleep until the counter of
that pipe reaches a desired value. The process can also query the
value of the counter.
The counter runs as long as the graphics subsystem is running; it is
initialized via the /usr/gfx/gfxinit command. However, a process can
query or sleep on the counter only when a direct context is current.
Each of the procedures described below will fail and return an error
code if the current context is not a direct one.
The counter is an unsigned 32-bit integer.
The official definition of this extension is available here:
http://www.opengl.org/registry/specs/SGI/video_sync.txt
'''
from OpenGL import platform, constant, arrays
from OpenGL import extensions, wrapper
import ctypes
from OpenGL.raw.GLX import _types, _glgets
from OpenGL.raw.GLX.SGI.video_sync import *
from OpenGL.raw.GLX.SGI.video_sync import _EXTENSION_NAME
def glInitVideoSyncSGI():
'''Return boolean indicating whether this extension is available'''
from OpenGL import extensions
return extensions.hasGLExtension( _EXTENSION_NAME )
### END AUTOGENERATED SECTION
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