2
http://www.opengl.org/registry/specs/SGI/video_sync.txt
3
int glXGetVideoSyncSGI (uint* count)
4
int glXWaitVideoSyncSGI (int divisor, int remainder, unsigned int* count)
2
http://www.opengl.org/registry/specs/SGI/video_sync.txt
3
int glXGetVideoSyncSGI (uint* count)
4
int glXWaitVideoSyncSGI (int divisor, int remainder, unsigned int* count)