parameters: (self)
docstring: Internal use.
docstring_summary: Internal use.
docstring_tokens: Internal use .
function: def _displayfunc(self):
          """Internal use."""
          if self.width == 0 or self.height == 0:
              #hidden?
              print "GLProgram.displayfunc called on hidden window?"
              return
          self.program.displayfunc()
          glutSwapBuffers ()
function_tokens: def _displayfunc ( self ) : if self . width == 0 or self . height == 0 : #hidden? print "GLProgram.displayfunc called on hidden window?" return self . program . displayfunc ( ) glutSwapBuffers ( )