1GLX_SGIX_video_resize 2http://www.opengl.org/registry/specs/SGIX/video_resize.txt 3GLX_SGIX_video_resize 4 GLX_SYNC_FRAME_SGIX 0x00000000 5 GLX_SYNC_SWAP_SGIX 0x00000001 6 int glXBindChannelToWindowSGIX (Display* display, int screen, int channel, Window window) 7 int glXChannelRectSGIX (Display* display, int screen, int channel, int x, int y, int w, int h) 8 int glXChannelRectSyncSGIX (Display* display, int screen, int channel, GLenum synctype) 9 int glXQueryChannelDeltasSGIX (Display* display, int screen, int channel, int *x, int *y, int *w, int *h) 10 int glXQueryChannelRectSGIX (Display* display, int screen, int channel, int *dx, int *dy, int *dw, int *dh) 11