int (*BindChannelToWindowSGIX)(Display *, int, int, Window);
int (*ChannelRectSGIX)(Display *, int, int, int, int, int, int);
int (*QueryChannelRectSGIX)(Display *, int, int, int *, int *, int *, int *);
int (*QueryChannelDeltasSGIX)(Display *, int, int, int *, int *, int *, int *);
int (*ChannelRectSyncSGIX)(Display *, int, int, GLenum);
int (*BindChannelToWindowSGIX)(Display *, int, int, Window);
int (*ChannelRectSGIX)(Display *, int, int, int, int, int, int);
int (*QueryChannelRectSGIX)(Display *, int, int, int *, int *, int *, int *);
int (*QueryChannelDeltasSGIX)(Display *, int, int, int *, int *, int *, int *);
int (*ChannelRectSyncSGIX)(Display *, int, int, GLenum);