-#ifndef GLX_SGI_make_current_read
-#define GLX_SGI_make_current_read 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Bool glXMakeCurrentReadSGI (Display *, GLXDrawable, GLXDrawable, GLXContext);
-extern GLXDrawable glXGetCurrentReadDrawableSGI (void);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Bool ( * PFNGLXMAKECURRENTREADSGIPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
-typedef GLXDrawable ( * PFNGLXGETCURRENTREADDRAWABLESGIPROC) (void);
-#endif
-
-#ifndef GLX_SGIX_video_source
-#define GLX_SGIX_video_source 1
-#ifdef _VL_H
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXVideoSourceSGIX glXCreateGLXVideoSourceSGIX (Display *, int, VLServer, VLPath, int, VLNode);
-extern void glXDestroyGLXVideoSourceSGIX (Display *, GLXVideoSourceSGIX);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXVideoSourceSGIX ( * PFNGLXCREATEGLXVIDEOSOURCESGIXPROC) (Display *display, int screen, VLServer server, VLPath path, int nodeClass, VLNode drainNode);
-typedef void ( * PFNGLXDESTROYGLXVIDEOSOURCESGIXPROC) (Display *dpy, GLXVideoSourceSGIX glxvideosource);
-#endif /* _VL_H */
-#endif
-
-#ifndef GLX_EXT_visual_rating
-#define GLX_EXT_visual_rating 1
-#endif
-
-#ifndef GLX_EXT_import_context
-#define GLX_EXT_import_context 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern Display * glXGetCurrentDisplayEXT (void);
-extern int glXQueryContextInfoEXT (Display *, GLXContext, int, int *);
-extern GLXContextID glXGetContextIDEXT (const GLXContext);
-extern GLXContext glXImportContextEXT (Display *, GLXContextID);
-extern void glXFreeContextEXT (Display *, GLXContext);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef Display * ( * PFNGLXGETCURRENTDISPLAYEXTPROC) (void);
-typedef int ( * PFNGLXQUERYCONTEXTINFOEXTPROC) (Display *dpy, GLXContext context, int attribute, int *value);
-typedef GLXContextID ( * PFNGLXGETCONTEXTIDEXTPROC) (const GLXContext context);
-typedef GLXContext ( * PFNGLXIMPORTCONTEXTEXTPROC) (Display *dpy, GLXContextID contextID);
-typedef void ( * PFNGLXFREECONTEXTEXTPROC) (Display *dpy, GLXContext context);
-#endif
-
-#ifndef GLX_SGIX_fbconfig
-#define GLX_SGIX_fbconfig 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXGetFBConfigAttribSGIX (Display *, GLXFBConfigSGIX, int, int *);
-extern GLXFBConfigSGIX * glXChooseFBConfigSGIX (Display *, int, int *, int *);
-extern GLXPixmap glXCreateGLXPixmapWithConfigSGIX (Display *, GLXFBConfigSGIX, Pixmap);
-extern GLXContext glXCreateContextWithConfigSGIX (Display *, GLXFBConfigSGIX, int, GLXContext, Bool);
-extern XVisualInfo * glXGetVisualFromFBConfigSGIX (Display *, GLXFBConfigSGIX);
-extern GLXFBConfigSGIX glXGetFBConfigFromVisualSGIX (Display *, XVisualInfo *);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXGETFBCONFIGATTRIBSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int attribute, int *value);
-typedef GLXFBConfigSGIX * ( * PFNGLXCHOOSEFBCONFIGSGIXPROC) (Display *dpy, int screen, int *attrib_list, int *nelements);
-typedef GLXPixmap ( * PFNGLXCREATEGLXPIXMAPWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, Pixmap pixmap);
-typedef GLXContext ( * PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, int render_type, GLXContext share_list, Bool direct);
-typedef XVisualInfo * ( * PFNGLXGETVISUALFROMFBCONFIGSGIXPROC) (Display *dpy, GLXFBConfigSGIX config);
-typedef GLXFBConfigSGIX ( * PFNGLXGETFBCONFIGFROMVISUALSGIXPROC) (Display *dpy, XVisualInfo *vis);
-#endif
-
-#ifndef GLX_SGIX_pbuffer
-#define GLX_SGIX_pbuffer 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern GLXPbufferSGIX glXCreateGLXPbufferSGIX (Display *, GLXFBConfigSGIX, unsigned int, unsigned int, int *);
-extern void glXDestroyGLXPbufferSGIX (Display *, GLXPbufferSGIX);
-extern int glXQueryGLXPbufferSGIX (Display *, GLXPbufferSGIX, int, unsigned int *);
-extern void glXSelectEventSGIX (Display *, GLXDrawable, unsigned long);
-extern void glXGetSelectedEventSGIX (Display *, GLXDrawable, unsigned long *);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef GLXPbufferSGIX ( * PFNGLXCREATEGLXPBUFFERSGIXPROC) (Display *dpy, GLXFBConfigSGIX config, unsigned int width, unsigned int height, int *attrib_list);
-typedef void ( * PFNGLXDESTROYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf);
-typedef int ( * PFNGLXQUERYGLXPBUFFERSGIXPROC) (Display *dpy, GLXPbufferSGIX pbuf, int attribute, unsigned int *value);
-typedef void ( * PFNGLXSELECTEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long mask);
-typedef void ( * PFNGLXGETSELECTEDEVENTSGIXPROC) (Display *dpy, GLXDrawable drawable, unsigned long *mask);
-#endif
-
-#ifndef GLX_SGI_cushion
-#define GLX_SGI_cushion 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern void glXCushionSGI (Display *, Window, float);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef void ( * PFNGLXCUSHIONSGIPROC) (Display *dpy, Window window, float cushion);
-#endif
-
-#ifndef GLX_SGIX_video_resize
-#define GLX_SGIX_video_resize 1
-#ifdef GLX_GLXEXT_PROTOTYPES
-extern int glXBindChannelToWindowSGIX (Display *, int, int, Window);
-extern int glXChannelRectSGIX (Display *, int, int, int, int, int, int);
-extern int glXQueryChannelRectSGIX (Display *, int, int, int *, int *, int *, int *);
-extern int glXQueryChannelDeltasSGIX (Display *, int, int, int *, int *, int *, int *);
-extern int glXChannelRectSyncSGIX (Display *, int, int, GLenum);
-#endif /* GLX_GLXEXT_PROTOTYPES */
-typedef int ( * PFNGLXBINDCHANNELTOWINDOWSGIXPROC) (Display *display, int screen, int channel, Window window);
-typedef int ( * PFNGLXCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int x, int y, int w, int h);
-typedef int ( * PFNGLXQUERYCHANNELRECTSGIXPROC) (Display *display, int screen, int channel, int *dx, int *dy, int *dw, int *dh);
-typedef int ( * PFNGLXQUERYCHANNELDELTASSGIXPROC) (Display *display, int screen, int channel, int *x, int *y, int *w, int *h);
-typedef int ( * PFNGLXCHANNELRECTSYNCSGIXPROC) (Display *display, int screen, int channel, GLenum synctype);
-#endif