logo.c

some animation source files ..

    {
    case GDK_a:
      toggle_animation (widget);
      break;
    case GDK_i:
      init_logo_view (widget);
      break;
    case GDK_Escape:
      gtk_main_quit ();
      break;
    default:
      return TRUE;
    }

  return TRUE;
}

static gboolean
timeout (GtkWidget *widget)
{
  /* Invalidate the whole window. */
  gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);

  /* Update synchronously. */
  gdk_window_process_updates (widget->window, FALSE);

  return TRUE;
}

static guint timeout_id = 0;

static void
timeout_add (GtkWidget *widget)
{
  if (timeout_id == 0)
    {
      timeout_id = gtk_timeout_add (TIMEOUT_INTERVAL,
                                    (GtkFunction) timeout,
                                    widget);
    }
}

static void
timeout_remove (GtkWidget *widget)
{
  if (timeout_id != 0)
    {
      gtk_timeout_remove (timeout_id);
      timeout_id = 0;
    }
}

static gboolean
map_event (GtkWidget   *widget,
	   GdkEventAny *event,
	   gpointer     data)
{
  if (animate)
    timeout_add (widget);

  return TRUE;
}

static gboolean
unmap_event (GtkWidget   *widget,
	     GdkEventAny *event,
	     gpointer     data)
{
  timeout_remove (widget);

  return TRUE;
}

static gboolean
visibility_notify_event (GtkWidget          *widget,
			 GdkEventVisibility *event,
			 gpointer            data)
{
  if (animate)
    {
      if (event->state == GDK_VISIBILITY_FULLY_OBSCURED)
	timeout_remove (widget);
      else
	timeout_add (widget);
    }

  return TRUE;
}

static void
toggle_animation (GtkWidget *widget)
{
  animate = !animate;

  if (animate)
    {
      timeout_add (widget);
    }
  else
    {
      timeout_remove (widget);
      gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
    }
}

static void
init_logo_view (GtkWidget *widget)
{
  init_logo_quat ();
  init_view ();
  mode = 0;
  counter = 0;

  if (!animate)
    gdk_window_invalidate_rect (widget->window, &widget->allocation, FALSE);
}

/* For popup menu. */
static gboolean
button_press_event_popup_menu (GtkWidget      *widget,
			       GdkEventButton *event,
			       gpointer        data)
{
  if (event->button == 3)
    {
      /* Popup menu. */
      gtk_menu_popup (GTK_MENU (widget), NULL, NULL, NULL, NULL,
		      event->button, event->time);
      return TRUE;
    }

  return FALSE;
}

/* Creates the popup menu.*/
static GtkWidget *
create_popup_menu (GtkWidget *drawing_area)
{
  GtkWidget *menu;
  GtkWidget *menu_item;

  menu = gtk_menu_new ();

  /* Toggle animation */
  menu_item = gtk_menu_item_new_with_label ("Toggle Animation");
  gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
  g_signal_connect_swapped (G_OBJECT (menu_item), "activate",
			    G_CALLBACK (toggle_animation), drawing_area);
  gtk_widget_show (menu_item);

  /* Init orientation */
  menu_item = gtk_menu_item_new_with_label ("Initialize");
  gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
  g_signal_connect_swapped (G_OBJECT (menu_item), "activate",
			    G_CALLBACK (init_logo_view), drawing_area);
  gtk_widget_show (menu_item);

  /* Quit */
  menu_item = gtk_menu_item_new_with_label ("Quit");
  gtk_menu_shell_append (GTK_MENU_SHELL (menu), menu_item);
  g_signal_connect (G_OBJECT (menu_item), "activate",
		    G_CALLBACK (gtk_main_quit), NULL);
  gtk_widget_show (menu_item);
	
  return menu;
}

static void
print_gl_config_attrib (GdkGLConfig *glconfig,
                        const gchar *attrib_str,
                        int          attrib,
                        gboolean     is_boolean)
{
  int value;

  g_print ("%s = ", attrib_str);
  if (gdk_gl_config_get_attrib (glconfig, attrib, &value))
    {
      if (is_boolean)
        g_print ("%s\n", value == TRUE ? "TRUE" : "FALSE");
      else
        g_print ("%d\n", value);
    }
  else
    g_print ("*** Cannot get %s attribute value\n", attrib_str);
}

static void
examine_gl_config_attrib (GdkGLConfig *glconfig)
{
  g_print ("\nOpenGL visual configurations :\n\n");

  g_print ("gdk_gl_config_is_rgba (glconfig) = %s\n",
           gdk_gl_config_is_rgba (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_is_double_buffered (glconfig) = %s\n",
           gdk_gl_config_is_double_buffered (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_is_stereo (glconfig) = %s\n",
           gdk_gl_config_is_stereo (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_has_alpha (glconfig) = %s\n",
           gdk_gl_config_has_alpha (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_has_depth_buffer (glconfig) = %s\n",
           gdk_gl_config_has_depth_buffer (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_has_stencil_buffer (glconfig) = %s\n",
           gdk_gl_config_has_stencil_buffer (glconfig) ? "TRUE" : "FALSE");
  g_print ("gdk_gl_config_has_accum_buffer (glconfig) = %s\n",
           gdk_gl_config_has_accum_buffer (glconfig) ? "TRUE" : "FALSE");

  g_print ("\n");

  print_gl_config_attrib (glconfig, "GDK_GL_USE_GL",           GDK_GL_USE_GL,           TRUE);
  print_gl_config_attrib (glconfig, "GDK_GL_BUFFER_SIZE",      GDK_GL_BUFFER_SIZE,      FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_LEVEL",            GDK_GL_LEVEL,            FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_RGBA",             GDK_GL_RGBA,             TRUE);
  print_gl_config_attrib (glconfig, "GDK_GL_DOUBLEBUFFER",     GDK_GL_DOUBLEBUFFER,     TRUE);
  print_gl_config_attrib (glconfig, "GDK_GL_STEREO",           GDK_GL_STEREO,           TRUE);
  print_gl_config_attrib (glconfig, "GDK_GL_AUX_BUFFERS",      GDK_GL_AUX_BUFFERS,      FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_RED_SIZE",         GDK_GL_RED_SIZE,         FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_GREEN_SIZE",       GDK_GL_GREEN_SIZE,       FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_BLUE_SIZE",        GDK_GL_BLUE_SIZE,        FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_ALPHA_SIZE",       GDK_GL_ALPHA_SIZE,       FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_DEPTH_SIZE",       GDK_GL_DEPTH_SIZE,       FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_STENCIL_SIZE",     GDK_GL_STENCIL_SIZE,     FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_ACCUM_RED_SIZE",   GDK_GL_ACCUM_RED_SIZE,   FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_ACCUM_GREEN_SIZE", GDK_GL_ACCUM_GREEN_SIZE, FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_ACCUM_BLUE_SIZE",  GDK_GL_ACCUM_BLUE_SIZE,  FALSE);
  print_gl_config_attrib (glconfig, "GDK_GL_ACCUM_ALPHA_SIZE", GDK_GL_ACCUM_ALPHA_SIZE, FALSE);

  g_print ("\n");
}

int
main(int   argc,
     char *argv[])
{
  GdkGLConfig *glconfig;
  gint major, minor;

  GtkWidget *window;
  GtkWidget *vbox;
  GtkWidget *drawing_area;
  GtkWidget *menu;
  GtkWidget *button;

  int i;
  gboolean arg_count = FALSE;

  /*
   * Init GTK.
   */

  gtk_init (&argc, &argv);

  /*
   * Init GtkGLExt.
   */

  gtk_gl_init (&argc, &argv);

  /*
   * Parse arguments.
   */

  for (i = 1; i < argc; i++)
    {
      if (arg_count)
	rot_count = atoi (argv[i]);

      if (strcmp (argv[i], "--help") == 0 ||
	  strcmp (argv[i], "-h") == 0)
	{
	  g_print ("Usage: %s [--count num] [--no-anim] [--help]\n", argv[0]);
	  exit (0);
	}

      if (strcmp (argv[i], "--count") == 0)
	arg_count = TRUE;

      if (strcmp (argv[i], "--no-anim") == 0)
	animate = FALSE;
    }

  /*
   * Query OpenGL extension version.
   */

  gdk_gl_query_version (&major, &minor);
  g_print ("\nOpenGL extension version - %d.%d\n",
           major, minor);

  /*
   * Configure OpenGL-capable visual.
   */

  /* Try double-buffered visual */
  glconfig = gdk_gl_config_new_by_mode (GDK_GL_MODE_RGB    |
					GDK_GL_MODE_DEPTH  |
					GDK_GL_MODE_DOUBLE);
  if (glconfig == NULL)
    {
      g_print ("*** Cannot find the double-buffered visual.\n");
      g_print ("*** Trying single-buffered visual.\n");

      /* Try single-buffered visual */
      glconfig = gdk_gl_config_new_by_mode (GDK_GL_MODE_RGB   |
					    GDK_GL_MODE_DEPTH);
      if (glconfig == NULL)
	{
	  g_print ("*** No appropriate OpenGL-capable visual found.\n");
	  exit (1);
	}
    }

  examine_gl_config_attrib (glconfig);

  /*
   * Top-level window.
   */

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_window_set_title (GTK_WINDOW (window), "logo");

  /* Get automatically redrawn if any of their children changed allocation. */
  gtk_container_set_reallocate_redraws (GTK_CONTAINER (window), TRUE);

  g_signal_connect (G_OBJECT (window), "delete_event",
		    G_CALLBACK (gtk_main_quit), NULL);

  /*
   * VBox.
   */

  vbox = gtk_vbox_new (FALSE, 0);
  gtk_container_add (GTK_CONTAINER (window), vbox);
  gtk_widget_show (vbox);

  /*
   * Drawing area for drawing OpenGL scene.
   */

  drawing_area = gtk_drawing_area_new ();
  gtk_widget_set_size_request (drawing_area, 300, 300);

  /* Set OpenGL-capability to the widget. */
  gtk_widget_set_gl_capability (drawing_area,
				glconfig,
				NULL,
				TRUE,
				GDK_GL_RGBA_TYPE);

  gtk_widget_add_events (drawing_area,
			 GDK_BUTTON1_MOTION_MASK    |
			 GDK_BUTTON2_MOTION_MASK    |
			 GDK_BUTTON_PRESS_MASK      |
			 GDK_VISIBILITY_NOTIFY_MASK);

  g_signal_connect_after (G_OBJECT (drawing_area), "realize",
                          G_CALLBACK (realize), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "configure_event",
		    G_CALLBACK (configure_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "expose_event",
		    G_CALLBACK (expose_event), NULL);

  g_signal_connect (G_OBJECT (drawing_area), "button_press_event",
		    G_CALLBACK (button_press_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "motion_notify_event",
		    G_CALLBACK (motion_notify_event), NULL);

  g_signal_connect (G_OBJECT (drawing_area), "map_event",
		    G_CALLBACK (map_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "unmap_event",
		    G_CALLBACK (unmap_event), NULL);
  g_signal_connect (G_OBJECT (drawing_area), "visibility_notify_event",
		    G_CALLBACK (visibility_notify_event), NULL);

  g_signal_connect_swapped (G_OBJECT (window), "key_press_event",
			    G_CALLBACK (key_press_event), drawing_area);

  gtk_box_pack_start (GTK_BOX (vbox), drawing_area, TRUE, TRUE, 0);

  gtk_widget_show (drawing_area);

  /*
   * Popup menu.
   */

  menu = create_popup_menu (drawing_area);

  /* Signal handler */
  g_signal_connect_swapped (G_OBJECT (drawing_area), "button_press_event",
                            G_CALLBACK (button_press_event_popup_menu), menu);

  /*
   * Simple quit button.
   */

  button = gtk_button_new_with_label ("Quit");

  g_signal_connect (G_OBJECT (button), "clicked",
                    G_CALLBACK (gtk_main_quit), NULL);

  gtk_box_pack_start (GTK_BOX (vbox), button, FALSE, FALSE, 0);

  gtk_widget_show (button);

  /*
   * Show window.
   */

  gtk_widget_show (window);

  /*
   * Main loop.
   */

  gtk_main ();

  return 0;
}