private void gsave(){
  GState oldGState=getGState();
  mGStateStack.add(new GState(oldGState));
  mPSStream.println(GSAVE_STR);
}

private void gsave ( ) { GState oldGState = getGState ( ) ; mGStateStack . add ( new GState ( oldGState ) ) ; mPSStream . println ( GSAVE_STR ) ; }
emit a postscript gsave command and add a new gstate on to our stack which represents the printer ' s gstate stack .
