/*

* Copyright (C) 2024 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 "Display.h"

#include "GtkVersioning.h"

#include "SystemSettingsManagerProxy.h"

#include <WebCore/GLContext.h>

#include <WebCore/GLDisplay.h>

#include <epoxy/egl.h>

#include <gtk/gtk.h>

#include <mutex>

#include <wtf/NeverDestroyed.h>

#include <wtf/glib/GUniquePtr.h>

namespace WebKit {

using namespace WebCore;

Display& Display::singleton()

{

static LazyNeverDestroyed<Display> display;

static std::once_flag onceFlag;

std::call_once(onceFlag, [] {

display.construct();

});

return display;

}

Display::Display()

{

if (!gtk_init_check(nullptr, nullptr))

return;

// As soon as gtk is initialized we listen to GtkSettings.

SystemSettingsManagerProxy::initialize();

m_gdkDisplay = gdk_display_manager_get_default_display(gdk_display_manager_get());

if (!m_gdkDisplay)

return;

g_signal_connect(m_gdkDisplay.get(), "closed", G_CALLBACK(+[](GdkDisplay*, gboolean, gpointer userData) {

auto& display = *static_cast<Display*>(userData);

if (display.m_glDisplay && display.m_glDisplayOwned)

display.m_glDisplay->terminate();

display.m_glDisplay = nullptr;

}), this);

}

Display::~Display()

{

if (m_gdkDisplay)

g_signal_handlers_disconnect_by_data(m_gdkDisplay.get(), this);

}

GLDisplay* Display::glDisplay() const

{

if (m_glInitialized)

return m_glDisplay.get();

m_glInitialized = true;

if (!m_gdkDisplay)

return nullptr;

#if PLATFORM(X11)

if (initializeGLDisplayX11())

return m_glDisplay.get();

#endif

#if PLATFORM(WAYLAND)

if (initializeGLDisplayWayland())

return m_glDisplay.get();

#endif

return nullptr;

}

#if !PLATFORM(X11)

bool Display::isX11() const

{

return false;

}

#endif

#if !PLATFORM(WAYLAND)

bool Display::isWayland() const

{

return false;

}

#endif

} // namespace WebKit