#include "gdkframeclock.h"
-G_DEFINE_INTERFACE (GdkFrameClockTarget, gdk_frame_clock_target, G_TYPE_OBJECT)
-
-static void
-gdk_frame_clock_target_default_init (GdkFrameClockTargetInterface *iface)
-{
-}
-
-void gdk_frame_clock_target_set_clock (GdkFrameClockTarget *target,
- GdkFrameClock *clock)
-{
- GDK_FRAME_CLOCK_TARGET_GET_IFACE (target)->set_clock (target, clock);
-}
-
/**
* SECTION:frameclock
* @Short_description: Frame clock syncs painting to a window or display
g_signal_emit (G_OBJECT (clock),
signals[FRAME_REQUESTED], 0);
}
+
+GdkFrameTimings *
+gdk_frame_clock_get_current_frame_timings (GdkFrameClock *clock)
+{
+ GdkFrameHistory *history;
+ gint64 frame_counter;
+
+ g_return_val_if_fail (GDK_IS_FRAME_CLOCK (clock), 0);
+
+ history = gdk_frame_clock_get_history (clock);
+ frame_counter = gdk_frame_history_get_frame_counter (history);
+ return gdk_frame_history_get_timings (history, frame_counter);
+}
+
+
+#define DEFAULT_REFRESH_INTERVAL 16667 /* 16.7ms (1/60th second) */
+#define MAX_HISTORY_AGE 150000 /* 150ms */
+
+void
+gdk_frame_clock_get_refresh_info (GdkFrameClock *clock,
+ gint64 base_time,
+ gint64 *refresh_interval_return,
+ gint64 *presentation_time_return)
+{
+ GdkFrameHistory *history;
+ gint64 frame_counter;
+
+ g_return_if_fail (GDK_IS_FRAME_CLOCK (clock));
+
+ history = gdk_frame_clock_get_history (clock);
+ frame_counter = gdk_frame_history_get_frame_counter (history);
+
+ if (presentation_time_return)
+ *presentation_time_return = 0;
+ if (refresh_interval_return)
+ *refresh_interval_return = DEFAULT_REFRESH_INTERVAL;
+
+ while (TRUE)
+ {
+ GdkFrameTimings *timings = gdk_frame_history_get_timings (history, frame_counter);
+ gint64 presentation_time;
+ gint64 refresh_interval;
+
+ if (timings == NULL)
+ return;
+
+ refresh_interval = gdk_frame_timings_get_refresh_interval (timings);
+ presentation_time = gdk_frame_timings_get_presentation_time (timings);
+
+ if (presentation_time != 0)
+ {
+ if (presentation_time > base_time - MAX_HISTORY_AGE &&
+ presentation_time_return)
+ {
+ if (refresh_interval == 0)
+ refresh_interval = DEFAULT_REFRESH_INTERVAL;
+
+ if (refresh_interval_return)
+ *refresh_interval_return = refresh_interval;
+
+ while (presentation_time < base_time)
+ presentation_time += refresh_interval;
+
+ if (presentation_time_return)
+ *presentation_time_return = presentation_time;
+ }
+
+ return;
+ }
+
+ frame_counter--;
+ }
+}