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/*
* Copyright (C) 2018 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DisplayRefreshMonitorGtk.h"
#if !USE(GTK4)
#include <gtk/gtk.h>
#include <wtf/RunLoop.h>
namespace WebCore {
constexpr FramesPerSecond DefaultFramesPerSecond = 60;
DisplayRefreshMonitorGtk::DisplayRefreshMonitorGtk(PlatformDisplayID displayID)
: DisplayRefreshMonitor(displayID)
{
}
DisplayRefreshMonitorGtk::~DisplayRefreshMonitorGtk()
{
ASSERT(!m_window);
}
static void onFrameClockUpdate(GdkFrameClock*, DisplayRefreshMonitorGtk* monitor)
{
monitor->displayLinkCallbackFired();
}
void DisplayRefreshMonitorGtk::displayLinkCallbackFired()
{
displayLinkFired(m_currentUpdate);
m_currentUpdate = m_currentUpdate.nextUpdate();
}
void DisplayRefreshMonitorGtk::stop()
{
if (!m_window)
return;
auto* frameClock = gtk_widget_get_frame_clock(m_window);
ASSERT(frameClock);
g_signal_handlers_disconnect_matched(frameClock, G_SIGNAL_MATCH_DATA, 0, 0, nullptr, nullptr, this);
gtk_widget_destroy(m_window);
m_window = nullptr;
}
bool DisplayRefreshMonitorGtk::startNotificationMechanism()
{
if (m_clockIsActive)
return true;
GdkFrameClock* frameClock;
if (!m_window) {
// GdkFrameClockIdle is private in GDK, so we need to create a toplevel to get its frame clock.
m_window = gtk_offscreen_window_new();
gtk_widget_realize(m_window);
frameClock = gtk_widget_get_frame_clock(m_window);
ASSERT(frameClock);
g_signal_connect(frameClock, "update", G_CALLBACK(onFrameClockUpdate), this);
} else
frameClock = gtk_widget_get_frame_clock(m_window);
ASSERT(frameClock);
gdk_frame_clock_begin_updating(frameClock);
// FIXME: Use gdk_frame_clock_get_refresh_info to get the correct frame rate.
m_currentUpdate = { 0, DefaultFramesPerSecond };
m_clockIsActive = true;
return true;
}
void DisplayRefreshMonitorGtk::stopNotificationMechanism()
{
if (!m_clockIsActive)
return;
auto* frameClock = gtk_widget_get_frame_clock(m_window);
ASSERT(frameClock);
gdk_frame_clock_end_updating(frameClock);
m_clockIsActive = false;
}
} // namespace WebCore
#endif // !USE(GTK4)
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