/* gcc 391684.c -o 391684 `pkg-config --libs --cflags gtk+-2.0 cairo` */
#include <gtk/gtk.h>
#include <cairo.h>
#include <math.h>

static void
paint (GtkWidget      *widget,
       GdkEventExpose *eev,
       gpointer        data)
{
  cairo_t *cr;

  cr = gdk_cairo_create (widget->window);
  cairo_save (cr);

  cairo_set_fill_rule (cr, CAIRO_FILL_RULE_WINDING);
  cairo_translate (cr, 50, 50);

  cairo_move_to (cr, 13.5, 13.5);
  cairo_curve_to (cr, 13.5, 6, 7.45703, 0, 0, 0);
  cairo_curve_to (cr, -7.45703, 0, -13.5, 6, -13.5, 13.5);
  cairo_curve_to (cr, -13.5, 20.9539,  -7.45703, 27, 0, 27);
  cairo_curve_to (cr, 7.45703, 27, 13.5, 20.9539, 13.5, 13.5);

//  cairo_close_path (cr);	// that does not change anything
//  cairo_new_sub_path (cr);	// that does not change anything

  cairo_move_to (cr, 0, 0);
  cairo_line_to (cr, 353, 0);
  cairo_line_to (cr, 353, 27); 
  cairo_line_to (cr, 0, 27);
  cairo_line_to (cr, 0, 0);
//  cairo_close_path (cr);	// that does not change anything

  cairo_set_source_rgb (cr, 0, 1, 0);
  cairo_fill (cr);

  cairo_restore (cr);
  cairo_destroy (cr);
}

gint
main (gint    argc,
      gchar **argv)
{
  GtkWidget *window;
  GtkWidget *canvas;

  gtk_init (&argc, &argv);

  window   = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  g_signal_connect (G_OBJECT (window), "delete-event",
                    G_CALLBACK (gtk_main_quit), NULL);
  canvas = gtk_drawing_area_new ();
  gtk_widget_set_size_request (canvas, 700, 500);
  g_signal_connect (G_OBJECT (canvas), "expose-event",
                    G_CALLBACK (paint),
                    NULL);
  gtk_container_add (GTK_CONTAINER (window), canvas);
  gtk_widget_show_all (window);
  gtk_main ();
  return 0;
}