Esempi in C++ (Cpp) per gdk_frame_timings_get_frame_counter

Esempio n. 1

File: gtkgears.c Progetto: 3v1n0/gtk

static gboolean
gtk_gears_tick (GtkWidget     *widget,
                GdkFrameClock *frame_clock,
                gpointer       user_data)
{
  GtkGears *gears = GTK_GEARS (widget);
  GtkGearsPrivate *priv = gtk_gears_get_instance_private (gears);
  GdkFrameTimings *timings, *previous_timings;
  gint64 previous_frame_time = 0;
  gint64 frame_time;
  gint64 history_start, history_len;
  gint64 frame;
  char *s;

  frame = gdk_frame_clock_get_frame_counter (frame_clock);
  frame_time = gdk_frame_clock_get_frame_time (frame_clock);

  if (priv->first_frame_time == 0)
    {
      /* No need for changes on first frame */
      priv->first_frame_time = frame_time;
      if (priv->fps_label)
        gtk_label_set_label (priv->fps_label, "FPS: ---");
      return G_SOURCE_CONTINUE;
    }

  /* glxgears advances 70 degrees per second, so do the same */

  priv->angle = fmod ((frame_time - priv->first_frame_time) / (double)G_USEC_PER_SEC * 70.0, 360.0);

  gtk_widget_queue_draw (widget);

  history_start = gdk_frame_clock_get_history_start (frame_clock);

  if (priv->fps_label && frame % 60 == 0)
    {
      history_len = frame - history_start;
      if (history_len > 0)
        {
          previous_timings = gdk_frame_clock_get_timings (frame_clock, frame - history_len);
          previous_frame_time = gdk_frame_timings_get_frame_time (previous_timings);

          s = g_strdup_printf ("FPS: %-4.1f", (G_USEC_PER_SEC * history_len) / (double)(frame_time - previous_frame_time));
          gtk_label_set_label (priv->fps_label, s);
          g_free (s);
        }
    }

  timings = gdk_frame_clock_get_current_timings (frame_clock);
  previous_timings = gdk_frame_clock_get_timings (frame_clock,
                                                  gdk_frame_timings_get_frame_counter (timings) - 1);
  if (previous_timings != NULL)
    previous_frame_time = gdk_frame_timings_get_frame_time (previous_timings);

  return G_SOURCE_CONTINUE;
}

Esempio n. 2

File: video-timer.c Progetto: BoozzyAmdJin/gtk-

static void
on_update (GdkFrameClock *frame_clock,
           gpointer       data)
{
  GdkFrameTimings *timings = gdk_frame_clock_get_current_timings (frame_clock);
  gint64 frame_time = gdk_frame_timings_get_frame_time (timings);
  gint64 predicted_presentation_time = gdk_frame_timings_get_predicted_presentation_time (timings);
  gint64 refresh_interval;
  FrameData *pending_frame;

  if (clock_time_base == 0)
    clock_time_base = frame_time + PRE_BUFFER_TIME;

  gdk_frame_clock_get_refresh_info (frame_clock, frame_time,
                                    &refresh_interval, NULL);

  pending_frame = peek_pending_frame ();
  if (stream_time_to_clock_time (pending_frame->stream_time)
      < predicted_presentation_time + refresh_interval / 2)
    {
      while (TRUE)
        {
          FrameData *next_frame = peek_next_frame ();
          if (next_frame &&
              stream_time_to_clock_time (next_frame->stream_time)
              < predicted_presentation_time + refresh_interval / 2)
            {
              g_slice_free (FrameData, unqueue_frame ());
              n_frames++;
              dropped_frames++;
              pending_frame = next_frame;
            }
          else
            break;
        }

      if (displayed_frame)
        past_frames = g_list_prepend (past_frames, displayed_frame);

      n_frames++;
      displayed_frame = unqueue_frame ();
      displayed_frame->clock_time = stream_time_to_clock_time (displayed_frame->stream_time);

      displayed_frame->frame_counter = gdk_frame_timings_get_frame_counter (timings);
      variable_add (&time_factor_stats, time_factor);

      collect_old_frames ();
      print_statistics ();

      gtk_widget_queue_draw (window);
    }
}