forked from AuroraMiddleware/gtk
687b49c18a
In commitc6901a8b, the frame clock reported time was changed from simply reporting the time we ran the frame clock cycle to reporting a smoothed value that increased by the frame interval each time it was called. However, this change caused some problems, such as: https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/1415 https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/1416 https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/1482 I think a lot of this is caused by the fact that we just overwrote the old frame time with the smoothed, monotonous timestamp, breaking some things that relied on knowing the actual time something happened. This is a new approach to doing the smoothing that is more explicit. The "frame_time" we store is the actual time we ran the update cycle, and then we separately compute and store the derived smoothed time and its period, allowing us to easily return a smoothed time at any time by rounding the time difference to an integer number of frames. The initial frame_time can be somewhat arbitrary, as it depends on the first cycle which is not driven by the frame clock. But follow-up cycles are typically tied to the the compositor sending the drawn signal. It may happen that the initial frame is exactly in the middle between two frames where jitter causes us to randomly round in different directions when rounding to nearest frame. To fix this we additionally do a quadratic convergence towards the "real" time, during presentation driven clock cycles (i.e. when the frame times are small). (cherry picked from commit9ef3e70040)
773 lines
24 KiB
C
773 lines
24 KiB
C
/* GDK - The GIMP Drawing Kit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2010. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "config.h"
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#include "gdkframeclockprivate.h"
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#include "gdkinternals.h"
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#include "gdkprofilerprivate.h"
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/**
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* SECTION:gdkframeclock
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* @Short_description: Frame clock syncs painting to a window or display
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* @Title: Frame clock
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*
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* A #GdkFrameClock tells the application when to update and repaint a
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* window. This may be synced to the vertical refresh rate of the
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* monitor, for example. Even when the frame clock uses a simple timer
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* rather than a hardware-based vertical sync, the frame clock helps
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* because it ensures everything paints at the same time (reducing the
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* total number of frames). The frame clock can also automatically
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* stop painting when it knows the frames will not be visible, or
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* scale back animation framerates.
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*
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* #GdkFrameClock is designed to be compatible with an OpenGL-based
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* implementation or with mozRequestAnimationFrame in Firefox,
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* for example.
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*
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* A frame clock is idle until someone requests a frame with
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* gdk_frame_clock_request_phase(). At some later point that makes
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* sense for the synchronization being implemented, the clock will
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* process a frame and emit signals for each phase that has been
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* requested. (See the signals of the #GdkFrameClock class for
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* documentation of the phases. %GDK_FRAME_CLOCK_PHASE_UPDATE and the
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* #GdkFrameClock::update signal are most interesting for application
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* writers, and are used to update the animations, using the frame time
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* given by gdk_frame_clock_get_frame_time().
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*
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* The frame time is reported in microseconds and generally in the same
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* timescale as g_get_monotonic_time(), however, it is not the same
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* as g_get_monotonic_time(). The frame time does not advance during
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* the time a frame is being painted, and outside of a frame, an attempt
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* is made so that all calls to gdk_frame_clock_get_frame_time() that
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* are called at a “similar” time get the same value. This means that
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* if different animations are timed by looking at the difference in
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* time between an initial value from gdk_frame_clock_get_frame_time()
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* and the value inside the #GdkFrameClock::update signal of the clock,
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* they will stay exactly synchronized.
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*/
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enum {
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FLUSH_EVENTS,
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BEFORE_PAINT,
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UPDATE,
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LAYOUT,
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PAINT,
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AFTER_PAINT,
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RESUME_EVENTS,
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LAST_SIGNAL
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};
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static guint signals[LAST_SIGNAL];
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#ifdef G_ENABLE_DEBUG
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static guint fps_counter;
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#endif
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#define FRAME_HISTORY_MAX_LENGTH 16
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struct _GdkFrameClockPrivate
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{
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gint64 frame_counter;
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gint n_timings;
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gint current;
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GdkFrameTimings *timings[FRAME_HISTORY_MAX_LENGTH];
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};
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G_DEFINE_ABSTRACT_TYPE_WITH_PRIVATE (GdkFrameClock, gdk_frame_clock, G_TYPE_OBJECT)
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static void
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gdk_frame_clock_finalize (GObject *object)
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{
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GdkFrameClockPrivate *priv = GDK_FRAME_CLOCK (object)->priv;
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int i;
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for (i = 0; i < FRAME_HISTORY_MAX_LENGTH; i++)
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if (priv->timings[i] != 0)
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gdk_frame_timings_unref (priv->timings[i]);
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G_OBJECT_CLASS (gdk_frame_clock_parent_class)->finalize (object);
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}
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static void
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gdk_frame_clock_class_init (GdkFrameClockClass *klass)
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{
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GObjectClass *gobject_class = (GObjectClass*) klass;
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gobject_class->finalize = gdk_frame_clock_finalize;
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/**
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* GdkFrameClock::flush-events:
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* @clock: the frame clock emitting the signal
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*
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* This signal is used to flush pending motion events that
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* are being batched up and compressed together. Applications
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* should not handle this signal.
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*/
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signals[FLUSH_EVENTS] =
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g_signal_new (g_intern_static_string ("flush-events"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::before-paint:
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* @clock: the frame clock emitting the signal
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*
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* This signal begins processing of the frame. Applications
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* should generally not handle this signal.
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*/
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signals[BEFORE_PAINT] =
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g_signal_new (g_intern_static_string ("before-paint"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::update:
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* @clock: the frame clock emitting the signal
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*
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* This signal is emitted as the first step of toolkit and
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* application processing of the frame. Animations should
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* be updated using gdk_frame_clock_get_frame_time().
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* Applications can connect directly to this signal, or
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* use gtk_widget_add_tick_callback() as a more convenient
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* interface.
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*/
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signals[UPDATE] =
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g_signal_new (g_intern_static_string ("update"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::layout:
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* @clock: the frame clock emitting the signal
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*
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* This signal is emitted as the second step of toolkit and
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* application processing of the frame. Any work to update
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* sizes and positions of application elements should be
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* performed. GTK+ normally handles this internally.
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*/
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signals[LAYOUT] =
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g_signal_new (g_intern_static_string ("layout"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::paint:
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* @clock: the frame clock emitting the signal
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*
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* This signal is emitted as the third step of toolkit and
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* application processing of the frame. The frame is
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* repainted. GDK normally handles this internally and
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* produces expose events, which are turned into GTK+
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* #GtkWidget::draw signals.
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*/
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signals[PAINT] =
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g_signal_new (g_intern_static_string ("paint"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::after-paint:
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* @clock: the frame clock emitting the signal
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*
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* This signal ends processing of the frame. Applications
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* should generally not handle this signal.
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*/
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signals[AFTER_PAINT] =
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g_signal_new (g_intern_static_string ("after-paint"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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/**
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* GdkFrameClock::resume-events:
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* @clock: the frame clock emitting the signal
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*
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* This signal is emitted after processing of the frame is
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* finished, and is handled internally by GTK+ to resume normal
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* event processing. Applications should not handle this signal.
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*/
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signals[RESUME_EVENTS] =
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g_signal_new (g_intern_static_string ("resume-events"),
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GDK_TYPE_FRAME_CLOCK,
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G_SIGNAL_RUN_LAST,
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0,
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NULL, NULL, NULL,
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G_TYPE_NONE, 0);
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}
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static void
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gdk_frame_clock_init (GdkFrameClock *clock)
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{
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GdkFrameClockPrivate *priv;
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clock->priv = priv = gdk_frame_clock_get_instance_private (clock);
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priv->frame_counter = -1;
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priv->current = FRAME_HISTORY_MAX_LENGTH - 1;
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#ifdef G_ENABLE_DEBUG
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if (fps_counter == 0)
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fps_counter = gdk_profiler_define_counter ("fps", "Frames per Second");
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#endif
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}
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/**
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* gdk_frame_clock_get_frame_time:
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* @frame_clock: a #GdkFrameClock
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*
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* Gets the time that should currently be used for animations. Inside
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* the processing of a frame, it’s the time used to compute the
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* animation position of everything in a frame. Outside of a frame, it's
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* the time of the conceptual “previous frame,” which may be either
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* the actual previous frame time, or if that’s too old, an updated
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* time.
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*
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* Since: 3.8
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* Returns: a timestamp in microseconds, in the timescale of
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* of g_get_monotonic_time().
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*/
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gint64
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gdk_frame_clock_get_frame_time (GdkFrameClock *frame_clock)
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{
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g_return_val_if_fail (GDK_IS_FRAME_CLOCK (frame_clock), 0);
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return GDK_FRAME_CLOCK_GET_CLASS (frame_clock)->get_frame_time (frame_clock);
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}
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/**
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* gdk_frame_clock_request_phase:
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* @frame_clock: a #GdkFrameClock
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* @phase: the phase that is requested
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*
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* Asks the frame clock to run a particular phase. The signal
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* corresponding the requested phase will be emitted the next
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* time the frame clock processes. Multiple calls to
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* gdk_frame_clock_request_phase() will be combined together
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* and only one frame processed. If you are displaying animated
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* content and want to continually request the
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* %GDK_FRAME_CLOCK_PHASE_UPDATE phase for a period of time,
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* you should use gdk_frame_clock_begin_updating() instead, since
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* this allows GTK+ to adjust system parameters to get maximally
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* smooth animations.
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*
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* Since: 3.8
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*/
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void
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gdk_frame_clock_request_phase (GdkFrameClock *frame_clock,
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GdkFrameClockPhase phase)
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{
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g_return_if_fail (GDK_IS_FRAME_CLOCK (frame_clock));
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GDK_FRAME_CLOCK_GET_CLASS (frame_clock)->request_phase (frame_clock, phase);
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}
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/**
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* gdk_frame_clock_begin_updating:
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* @frame_clock: a #GdkFrameClock
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*
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* Starts updates for an animation. Until a matching call to
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* gdk_frame_clock_end_updating() is made, the frame clock will continually
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* request a new frame with the %GDK_FRAME_CLOCK_PHASE_UPDATE phase.
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* This function may be called multiple times and frames will be
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* requested until gdk_frame_clock_end_updating() is called the same
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* number of times.
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*
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* Since: 3.8
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*/
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void
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gdk_frame_clock_begin_updating (GdkFrameClock *frame_clock)
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{
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g_return_if_fail (GDK_IS_FRAME_CLOCK (frame_clock));
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GDK_FRAME_CLOCK_GET_CLASS (frame_clock)->begin_updating (frame_clock);
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}
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/**
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* gdk_frame_clock_end_updating:
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* @frame_clock: a #GdkFrameClock
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*
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* Stops updates for an animation. See the documentation for
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* gdk_frame_clock_begin_updating().
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*
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* Since: 3.8
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*/
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void
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gdk_frame_clock_end_updating (GdkFrameClock *frame_clock)
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{
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g_return_if_fail (GDK_IS_FRAME_CLOCK (frame_clock));
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GDK_FRAME_CLOCK_GET_CLASS (frame_clock)->end_updating (frame_clock);
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}
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void
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_gdk_frame_clock_freeze (GdkFrameClock *clock)
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{
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g_return_if_fail (GDK_IS_FRAME_CLOCK (clock));
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GDK_FRAME_CLOCK_GET_CLASS (clock)->freeze (clock);
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}
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void
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_gdk_frame_clock_thaw (GdkFrameClock *clock)
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{
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g_return_if_fail (GDK_IS_FRAME_CLOCK (clock));
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GDK_FRAME_CLOCK_GET_CLASS (clock)->thaw (clock);
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}
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/**
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* gdk_frame_clock_get_frame_counter:
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* @frame_clock: a #GdkFrameClock
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*
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* A #GdkFrameClock maintains a 64-bit counter that increments for
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* each frame drawn.
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*
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* Returns: inside frame processing, the value of the frame counter
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* for the current frame. Outside of frame processing, the frame
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* counter for the last frame.
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* Since: 3.8
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*/
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gint64
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gdk_frame_clock_get_frame_counter (GdkFrameClock *frame_clock)
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{
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GdkFrameClockPrivate *priv;
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g_return_val_if_fail (GDK_IS_FRAME_CLOCK (frame_clock), 0);
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priv = frame_clock->priv;
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return priv->frame_counter;
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}
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/**
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* gdk_frame_clock_get_history_start:
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* @frame_clock: a #GdkFrameClock
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*
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* #GdkFrameClock internally keeps a history of #GdkFrameTimings
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* objects for recent frames that can be retrieved with
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* gdk_frame_clock_get_timings(). The set of stored frames
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* is the set from the counter values given by
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* gdk_frame_clock_get_history_start() and
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* gdk_frame_clock_get_frame_counter(), inclusive.
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*
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* Returns: the frame counter value for the oldest frame
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* that is available in the internal frame history of the
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* #GdkFrameClock.
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* Since: 3.8
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*/
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gint64
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gdk_frame_clock_get_history_start (GdkFrameClock *frame_clock)
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{
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GdkFrameClockPrivate *priv;
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g_return_val_if_fail (GDK_IS_FRAME_CLOCK (frame_clock), 0);
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priv = frame_clock->priv;
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return priv->frame_counter + 1 - priv->n_timings;
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}
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void
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_gdk_frame_clock_begin_frame (GdkFrameClock *frame_clock)
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{
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GdkFrameClockPrivate *priv;
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g_return_if_fail (GDK_IS_FRAME_CLOCK (frame_clock));
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priv = frame_clock->priv;
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priv->frame_counter++;
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priv->current = (priv->current + 1) % FRAME_HISTORY_MAX_LENGTH;
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/* Try to steal the previous frame timing instead of discarding
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* and allocating a new one.
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*/
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if G_LIKELY (priv->n_timings == FRAME_HISTORY_MAX_LENGTH &&
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_gdk_frame_timings_steal (priv->timings[priv->current],
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priv->frame_counter))
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return;
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if (priv->n_timings < FRAME_HISTORY_MAX_LENGTH)
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priv->n_timings++;
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else
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gdk_frame_timings_unref (priv->timings[priv->current]);
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priv->timings[priv->current] = _gdk_frame_timings_new (priv->frame_counter);
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}
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/**
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* gdk_frame_clock_get_timings:
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* @frame_clock: a #GdkFrameClock
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* @frame_counter: the frame counter value identifying the frame to
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* be received.
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*
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* Retrieves a #GdkFrameTimings object holding timing information
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* for the current frame or a recent frame. The #GdkFrameTimings
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* object may not yet be complete: see gdk_frame_timings_get_complete().
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*
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* Returns: (nullable) (transfer none): the #GdkFrameTimings object for
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* the specified frame, or %NULL if it is not available. See
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* gdk_frame_clock_get_history_start().
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* Since: 3.8
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*/
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GdkFrameTimings *
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gdk_frame_clock_get_timings (GdkFrameClock *frame_clock,
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gint64 frame_counter)
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{
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GdkFrameClockPrivate *priv;
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gint pos;
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g_return_val_if_fail (GDK_IS_FRAME_CLOCK (frame_clock), NULL);
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priv = frame_clock->priv;
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if (frame_counter > priv->frame_counter)
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return NULL;
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if (frame_counter <= priv->frame_counter - priv->n_timings)
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return NULL;
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pos = (priv->current - (priv->frame_counter - frame_counter) + FRAME_HISTORY_MAX_LENGTH) % FRAME_HISTORY_MAX_LENGTH;
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return priv->timings[pos];
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}
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/**
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* gdk_frame_clock_get_current_timings:
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* @frame_clock: a #GdkFrameClock
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*
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* Gets the frame timings for the current frame.
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*
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* Returns: (nullable) (transfer none): the #GdkFrameTimings for the
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* frame currently being processed, or even no frame is being
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* processed, for the previous frame. Before any frames have been
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* processed, returns %NULL.
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* Since: 3.8
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*/
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||
GdkFrameTimings *
|
||
gdk_frame_clock_get_current_timings (GdkFrameClock *frame_clock)
|
||
{
|
||
GdkFrameClockPrivate *priv;
|
||
|
||
g_return_val_if_fail (GDK_IS_FRAME_CLOCK (frame_clock), 0);
|
||
|
||
priv = frame_clock->priv;
|
||
|
||
return gdk_frame_clock_get_timings (frame_clock, priv->frame_counter);
|
||
}
|
||
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
void
|
||
_gdk_frame_clock_debug_print_timings (GdkFrameClock *clock,
|
||
GdkFrameTimings *timings)
|
||
{
|
||
GString *str;
|
||
|
||
gint64 previous_frame_time = 0;
|
||
gint64 previous_smoothed_frame_time = 0;
|
||
GdkFrameTimings *previous_timings = gdk_frame_clock_get_timings (clock,
|
||
timings->frame_counter - 1);
|
||
|
||
if (previous_timings != NULL)
|
||
{
|
||
previous_frame_time = previous_timings->frame_time;
|
||
previous_smoothed_frame_time = previous_timings->smoothed_frame_time;
|
||
}
|
||
|
||
str = g_string_new ("");
|
||
|
||
g_string_append_printf (str, "%5" G_GINT64_FORMAT ":", timings->frame_counter);
|
||
if (previous_frame_time != 0)
|
||
{
|
||
g_string_append_printf (str, " interval=%-4.1f", (timings->frame_time - previous_frame_time) / 1000.);
|
||
g_string_append_printf (str, timings->slept_before ? " (sleep)" : " ");
|
||
g_string_append_printf (str, " smoothed=%4.1f / %-4.1f",
|
||
(timings->smoothed_frame_time - timings->frame_time) / 1000.,
|
||
(timings->smoothed_frame_time - previous_smoothed_frame_time) / 1000.);
|
||
}
|
||
if (timings->layout_start_time != 0)
|
||
g_string_append_printf (str, " layout_start=%-4.1f", (timings->layout_start_time - timings->frame_time) / 1000.);
|
||
if (timings->paint_start_time != 0)
|
||
g_string_append_printf (str, " paint_start=%-4.1f", (timings->paint_start_time - timings->frame_time) / 1000.);
|
||
if (timings->frame_end_time != 0)
|
||
g_string_append_printf (str, " frame_end=%-4.1f", (timings->frame_end_time - timings->frame_time) / 1000.);
|
||
if (timings->drawn_time != 0)
|
||
g_string_append_printf (str, " drawn=%-4.1f", (timings->drawn_time - timings->frame_time) / 1000.);
|
||
if (timings->presentation_time != 0)
|
||
g_string_append_printf (str, " present=%-4.1f", (timings->presentation_time - timings->frame_time) / 1000.);
|
||
if (timings->predicted_presentation_time != 0)
|
||
g_string_append_printf (str, " predicted=%-4.1f", (timings->predicted_presentation_time - timings->frame_time) / 1000.);
|
||
if (timings->refresh_interval != 0)
|
||
g_string_append_printf (str, " refresh_interval=%-4.1f", timings->refresh_interval / 1000.);
|
||
|
||
g_message ("%s", str->str);
|
||
g_string_free (str, TRUE);
|
||
}
|
||
#endif /* G_ENABLE_DEBUG */
|
||
|
||
#define DEFAULT_REFRESH_INTERVAL 16667 /* 16.7ms (1/60th second) */
|
||
#define MAX_HISTORY_AGE 150000 /* 150ms */
|
||
|
||
/**
|
||
* gdk_frame_clock_get_refresh_info:
|
||
* @frame_clock: a #GdkFrameClock
|
||
* @base_time: base time for determining a presentaton time
|
||
* @refresh_interval_return: (out) (optional): a location to store the
|
||
* determined refresh interval, or %NULL. A default refresh interval of
|
||
* 1/60th of a second will be stored if no history is present.
|
||
* @presentation_time_return: (out): a location to store the next
|
||
* candidate presentation time after the given base time.
|
||
* 0 will be will be stored if no history is present.
|
||
*
|
||
* Using the frame history stored in the frame clock, finds the last
|
||
* known presentation time and refresh interval, and assuming that
|
||
* presentation times are separated by the refresh interval,
|
||
* predicts a presentation time that is a multiple of the refresh
|
||
* interval after the last presentation time, and later than @base_time.
|
||
*
|
||
* Since: 3.8
|
||
*/
|
||
void
|
||
gdk_frame_clock_get_refresh_info (GdkFrameClock *frame_clock,
|
||
gint64 base_time,
|
||
gint64 *refresh_interval_return,
|
||
gint64 *presentation_time_return)
|
||
{
|
||
gint64 frame_counter;
|
||
gint64 default_refresh_interval = DEFAULT_REFRESH_INTERVAL;
|
||
|
||
g_return_if_fail (GDK_IS_FRAME_CLOCK (frame_clock));
|
||
|
||
frame_counter = gdk_frame_clock_get_frame_counter (frame_clock);
|
||
|
||
while (TRUE)
|
||
{
|
||
GdkFrameTimings *timings = gdk_frame_clock_get_timings (frame_clock, frame_counter);
|
||
gint64 presentation_time;
|
||
gint64 refresh_interval;
|
||
|
||
if (timings == NULL)
|
||
break;
|
||
|
||
refresh_interval = timings->refresh_interval;
|
||
presentation_time = timings->presentation_time;
|
||
|
||
if (refresh_interval == 0)
|
||
refresh_interval = default_refresh_interval;
|
||
else
|
||
default_refresh_interval = refresh_interval;
|
||
|
||
if (presentation_time != 0)
|
||
{
|
||
if (presentation_time > base_time - MAX_HISTORY_AGE &&
|
||
presentation_time_return)
|
||
{
|
||
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;
|
||
}
|
||
|
||
break;
|
||
}
|
||
|
||
frame_counter--;
|
||
}
|
||
|
||
if (presentation_time_return)
|
||
*presentation_time_return = 0;
|
||
if (refresh_interval_return)
|
||
*refresh_interval_return = default_refresh_interval;
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_flush_events (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[FLUSH_EVENTS], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_before_paint (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[BEFORE_PAINT], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_update (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[UPDATE], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_layout (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[LAYOUT], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_paint (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[PAINT], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_after_paint (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[AFTER_PAINT], 0);
|
||
}
|
||
|
||
void
|
||
_gdk_frame_clock_emit_resume_events (GdkFrameClock *frame_clock)
|
||
{
|
||
g_signal_emit (frame_clock, signals[RESUME_EVENTS], 0);
|
||
}
|
||
|
||
#ifdef G_ENABLE_DEBUG
|
||
static gint64
|
||
guess_refresh_interval (GdkFrameClock *frame_clock)
|
||
{
|
||
gint64 interval;
|
||
gint64 i;
|
||
|
||
interval = G_MAXINT64;
|
||
|
||
for (i = gdk_frame_clock_get_history_start (frame_clock);
|
||
i < gdk_frame_clock_get_frame_counter (frame_clock);
|
||
i++)
|
||
{
|
||
GdkFrameTimings *t, *before;
|
||
gint64 ts, before_ts;
|
||
|
||
t = gdk_frame_clock_get_timings (frame_clock, i);
|
||
before = gdk_frame_clock_get_timings (frame_clock, i - 1);
|
||
if (t == NULL || before == NULL)
|
||
continue;
|
||
|
||
ts = gdk_frame_timings_get_frame_time (t);
|
||
before_ts = gdk_frame_timings_get_frame_time (before);
|
||
if (ts == 0 || before_ts == 0)
|
||
continue;
|
||
|
||
interval = MIN (interval, ts - before_ts);
|
||
}
|
||
|
||
if (interval == G_MAXINT64)
|
||
return 0;
|
||
|
||
return interval;
|
||
}
|
||
|
||
static double
|
||
frame_clock_get_fps (GdkFrameClock *frame_clock)
|
||
{
|
||
GdkFrameTimings *start, *end;
|
||
gint64 start_counter, end_counter;
|
||
gint64 start_timestamp, end_timestamp;
|
||
gint64 interval;
|
||
|
||
start_counter = gdk_frame_clock_get_history_start (frame_clock);
|
||
end_counter = gdk_frame_clock_get_frame_counter (frame_clock);
|
||
start = gdk_frame_clock_get_timings (frame_clock, start_counter);
|
||
for (end = gdk_frame_clock_get_timings (frame_clock, end_counter);
|
||
end_counter > start_counter && end != NULL && !gdk_frame_timings_get_complete (end);
|
||
end = gdk_frame_clock_get_timings (frame_clock, end_counter))
|
||
end_counter--;
|
||
if (end_counter - start_counter < 4)
|
||
return 0.0;
|
||
|
||
start_timestamp = gdk_frame_timings_get_presentation_time (start);
|
||
end_timestamp = gdk_frame_timings_get_presentation_time (end);
|
||
if (start_timestamp == 0 || end_timestamp == 0)
|
||
{
|
||
start_timestamp = gdk_frame_timings_get_frame_time (start);
|
||
end_timestamp = gdk_frame_timings_get_frame_time (end);
|
||
}
|
||
interval = gdk_frame_timings_get_refresh_interval (end);
|
||
if (interval == 0)
|
||
{
|
||
interval = guess_refresh_interval (frame_clock);
|
||
if (interval == 0)
|
||
return 0.0;
|
||
}
|
||
|
||
return ((double) end_counter - start_counter) * G_USEC_PER_SEC / (end_timestamp - start_timestamp);
|
||
}
|
||
#endif
|
||
|
||
void
|
||
_gdk_frame_clock_add_timings_to_profiler (GdkFrameClock *clock,
|
||
GdkFrameTimings *timings)
|
||
{
|
||
#ifdef G_ENABLE_DEBUG
|
||
gdk_profiler_add_mark (timings->frame_time * 1000,
|
||
(timings->frame_end_time - timings->frame_time) * 1000,
|
||
"frame", "");
|
||
|
||
if (timings->layout_start_time != 0)
|
||
gdk_profiler_add_mark (timings->layout_start_time * 1000,
|
||
(timings->paint_start_time - timings->layout_start_time) * 1000,
|
||
"layout", "");
|
||
|
||
if (timings->paint_start_time != 0)
|
||
gdk_profiler_add_mark (timings->paint_start_time * 1000,
|
||
(timings->frame_end_time - timings->paint_start_time) * 1000,
|
||
"paint", "");
|
||
|
||
if (timings->presentation_time != 0)
|
||
gdk_profiler_add_mark (timings->presentation_time * 1000,
|
||
0,
|
||
"presentation", "");
|
||
|
||
gdk_profiler_set_counter (fps_counter,
|
||
timings->frame_end_time * 1000,
|
||
frame_clock_get_fps (clock));
|
||
#endif
|
||
}
|