+ /*** GLX_NV_vertex_array_range ***/
+ void * (*AllocateMemoryNV)( GLsizei size,
+ GLfloat readFrequency,
+ GLfloat writeFrequency,
+ GLfloat priority );
+ void (*FreeMemoryNV)( GLvoid *pointer );
+
+ /*** GLX_MESA_agp_offset ***/
+ GLuint (*GetAGPOffsetMESA)( const GLvoid *pointer );
+
+ /*** GLX_EXT_texture_from_pixmap ***/
+ void (*BindTexImageEXT)(Display *dpy, GLXDrawable drawable, int buffer,
+ const int *attrib_list);
+ void (*ReleaseTexImageEXT)(Display *dpy, GLXDrawable drawable, int buffer);