_mesa_init_viewport(struct gl_context *ctx);
-extern void
-_mesa_free_viewport_data(struct gl_context *ctx);
+extern void GLAPIENTRY
+_mesa_ClipControl(GLenum origin, GLenum depth);
+extern void
+_mesa_get_viewport_xform(struct gl_context *ctx, unsigned i,
+ double scale[3], double translate[3]);
#endif