-
-/* GLX 1.4 and later */
-extern void (*glXGetProcAddress(const GLubyte *procname))();
-
-
-#ifndef GLX_GLXEXT_LEGACY
-
-#include <GL/glxext.h>
-
-#else
-
-
-/*
- * 28. GLX_EXT_visual_info extension
- */
-#ifndef GLX_EXT_visual_info
-#define GLX_EXT_visual_info 1
-
-#define GLX_X_VISUAL_TYPE_EXT 0x22
-#define GLX_TRANSPARENT_TYPE_EXT 0x23
-#define GLX_TRANSPARENT_INDEX_VALUE_EXT 0x24
-#define GLX_TRANSPARENT_RED_VALUE_EXT 0x25
-#define GLX_TRANSPARENT_GREEN_VALUE_EXT 0x26
-#define GLX_TRANSPARENT_BLUE_VALUE_EXT 0x27
-#define GLX_TRANSPARENT_ALPHA_VALUE_EXT 0x28
-#define GLX_TRUE_COLOR_EXT 0x8002
-#define GLX_DIRECT_COLOR_EXT 0x8003
-#define GLX_PSEUDO_COLOR_EXT 0x8004
-#define GLX_STATIC_COLOR_EXT 0x8005
-#define GLX_GRAY_SCALE_EXT 0x8006
-#define GLX_STATIC_GRAY_EXT 0x8007
-#define GLX_NONE_EXT 0x8000
-#define GLX_TRANSPARENT_RGB_EXT 0x8008
-#define GLX_TRANSPARENT_INDEX_EXT 0x8009
-
-#endif /* 28. GLX_EXT_visual_info extension */
-
+/* GLX 1.3 function pointer typedefs */
+typedef GLXFBConfig * (* PFNGLXGETFBCONFIGSPROC) (Display *dpy, int screen, int *nelements);
+typedef GLXFBConfig * (* PFNGLXCHOOSEFBCONFIGPROC) (Display *dpy, int screen, const int *attrib_list, int *nelements);
+typedef int (* PFNGLXGETFBCONFIGATTRIBPROC) (Display *dpy, GLXFBConfig config, int attribute, int *value);
+typedef XVisualInfo * (* PFNGLXGETVISUALFROMFBCONFIGPROC) (Display *dpy, GLXFBConfig config);
+typedef GLXWindow (* PFNGLXCREATEWINDOWPROC) (Display *dpy, GLXFBConfig config, Window win, const int *attrib_list);
+typedef void (* PFNGLXDESTROYWINDOWPROC) (Display *dpy, GLXWindow win);
+typedef GLXPixmap (* PFNGLXCREATEPIXMAPPROC) (Display *dpy, GLXFBConfig config, Pixmap pixmap, const int *attrib_list);
+typedef void (* PFNGLXDESTROYPIXMAPPROC) (Display *dpy, GLXPixmap pixmap);
+typedef GLXPbuffer (* PFNGLXCREATEPBUFFERPROC) (Display *dpy, GLXFBConfig config, const int *attrib_list);
+typedef void (* PFNGLXDESTROYPBUFFERPROC) (Display *dpy, GLXPbuffer pbuf);
+typedef void (* PFNGLXQUERYDRAWABLEPROC) (Display *dpy, GLXDrawable draw, int attribute, unsigned int *value);
+typedef GLXContext (* PFNGLXCREATENEWCONTEXTPROC) (Display *dpy, GLXFBConfig config, int render_type, GLXContext share_list, Bool direct);
+typedef Bool (* PFNGLXMAKECONTEXTCURRENTPROC) (Display *dpy, GLXDrawable draw, GLXDrawable read, GLXContext ctx);
+typedef GLXDrawable (* PFNGLXGETCURRENTREADDRAWABLEPROC) (void);
+typedef Display * (* PFNGLXGETCURRENTDISPLAYPROC) (void);
+typedef int (* PFNGLXQUERYCONTEXTPROC) (Display *dpy, GLXContext ctx, int attribute, int *value);
+typedef void (* PFNGLXSELECTEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long event_mask);
+typedef void (* PFNGLXGETSELECTEDEVENTPROC) (Display *dpy, GLXDrawable draw, unsigned long *event_mask);