GdkFrameTimings

typedef struct {
  guint ref_count;

  gint64 frame_counter;
  guint64 cookie;
  gint64 frame_time;
  gint64 drawn_time;
  gint64 presentation_time;
  gint64 refresh_interval;
  gint64 predicted_presentation_time;

#ifdef G_ENABLE_DEBUG
  gint64 layout_start_time;
  gint64 paint_start_time;
  gint64 frame_end_time;
#endif /* G_ENABLE_DEBUG */

  guint complete : 1;
  guint slept_before : 1;
} GdkFrameTimings;

gdk_frame_timings_ref ()

GdkFrameTimings *   gdk_frame_timings_ref               (GdkFrameTimings *timings);

Increases the reference count of timings.

Since 3.8

gdk_frame_timings_unref ()

void                gdk_frame_timings_unref             (GdkFrameTimings *timings);

Decreases the reference count of timings. If timings is no longer referenced, it will be freed.

Since 3.8

gdk_frame_timings_get_frame_counter ()

gint64              gdk_frame_timings_get_frame_counter (GdkFrameTimings *timings);

Gets the frame counter value of the GdkFrameClock when this this frame was drawn.

Since 3.8

gdk_frame_timings_get_complete ()

gboolean            gdk_frame_timings_get_complete      (GdkFrameTimings *timings);

The timing information in a GdkFrameTimings is filled in incrementally as the frame as drawn and passed off to the window system for processing and display to the user. The accessor functions for GdkFrameTimings can return 0 to indicate an unavailable value for two reasons: either because the information is not yet available, or because it isn't available at all. Once gdk_frame_timings_complete() returns TRUE for a frame, you can be certain that no further values will become available and be stored in the GdkFrameTimings.

Since 3.8

gdk_frame_timings_get_frame_time ()

gint64              gdk_frame_timings_get_frame_time    (GdkFrameTimings *timings);

Returns the frame time for the frame. This is the time value that is typically used to time animations for the frame. See gdk_frame_clock_get_frame_time().

gdk_frame_timings_get_presentation_time ()

gint64              gdk_frame_timings_get_presentation_time
                                                        (GdkFrameTimings *timings);

Reurns the presentation time. This is the time at which the frame became visible to the user.

Since 3.8

gdk_frame_timings_get_refresh_interval ()

gint64              gdk_frame_timings_get_refresh_interval
                                                        (GdkFrameTimings *timings);

Gets the natural interval between presentation times for the display that this frame was displayed on. Frame presentation usually happens during the "vertical blanking interval".

Since 3.8

gdk_frame_timings_get_predicted_presentation_time ()

gint64              gdk_frame_timings_get_predicted_presentation_time
                                                        (GdkFrameTimings *timings);

Gets the predicted time at which this frame will be displayed. Although no predicted time may be available, if one is available, it will be available while the frame is being generated, in contrast to gdk_frame_timings_get_presentation_time(), which is only available after the frame has been presented. In general, if you are simply animating, you should use gdk_frame_clock_get_frame_time() rather than this function, but this function is useful for applications that want exact control over latency. For example, a movie player may want this information for Audio/Video synchronization.

Since 3.8