TEST ()

{

  GeglBuffer   *buffer;

  GeglBuffer   *sub;

  GeglRectangle extent = {0,0,20,20};

  GeglRectangle sextent = {2,2,20,20};

  GeglRectangle roi = {0,0,20,20};

  test_start();

  buffer = gegl_buffer_new (&extent, babl_format ("Y float"));

  sub = gegl_buffer_create_sub_buffer (buffer, &sextent);

  fill_rect (sub, &roi, 0.5);

  print_buffer (buffer);

  g_object_unref (sub);

  g_object_unref (buffer);

  test_end ();

}