text: #include "front.h"
  #include "back.h"
  
  void front_start(int argc, char** argv)
  {
    back_start(argc, argv);
  }
  
  void front_stop(void)
  {
    back_stop();
  }
  
  unsigned char* front_pixels(void)
  {
    return back_pixels();
  }
  
  unsigned front_width(void)
  {
    return back_width();
  }
  
  unsigned front_height(void)
  {
    return back_height();
  }
  
  void front_mouse_down(double x, double y)
  {
    back_mouse_down(x, y);
  }
  
  void front_mouse_up(double x, double y)
  {
    back_mouse_up(x, y);
  }
  
  void front_key_down(char k)
  {
    back_key_down(k);
  }
  
  void front_key_up(void)
  {
    back_key_up();
  }
  