Managing Modes and Execution
You can control the execution of previously issued OpenGL functions with glFinish, which forces all such functions to finish, or glFlush, which ensures that all such functions will be completed in a finite time.
In a particular implementation of OpenGL, you may be able to control certain behaviors with hints by using glHint. Such behaviors are the quality of color and texture coordinate interpolation; the accuracy of fog calculations; and the sampling quality of antialiased points, lines, or polygons.
Build date: 3/6/2012