TEST ()
{
GeglBuffer *buffer;
GeglRectangle extent = {0,0,20,20};
GeglRectangle roi = {0,0,20,20};
test_start();
buffer = gegl_buffer_new (&extent, babl_format ("Y float"));
fill_rect (buffer, &roi, 0.5);
print_buffer (buffer);
g_object_unref (buffer);
test_end ();
}