1 files changed, 32 insertions, 43 deletions

diff --git a/src/core/desktop_screen_qt.cpp b/src/core/desktop_screen_qt.cpp
index e81dbb9ac..fb68f7b09 100644
--- a/src/core/desktop_screen_qt.cpp
+++ b/src/core/desktop_screen_qt.cpp
@@ -1,41 +1,5 @@
-/****************************************************************************
-**
-** Copyright (C) 2021 The Qt Company Ltd.
-** Contact: https://www.qt.io/licensing/
-**
-** This file is part of the QtWebEngine module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** Commercial License Usage
-** Licensees holding valid commercial Qt licenses may use this file in
-** accordance with the commercial license agreement provided with the
-** Software or, alternatively, in accordance with the terms contained in
-** a written agreement between you and The Qt Company. For licensing terms
-** and conditions see https://www.qt.io/terms-conditions. For further
-** information use the contact form at https://www.qt.io/contact-us.
-**
-** GNU Lesser General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU Lesser
-** General Public License version 3 as published by the Free Software
-** Foundation and appearing in the file LICENSE.LGPL3 included in the
-** packaging of this file. Please review the following information to
-** ensure the GNU Lesser General Public License version 3 requirements
-** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU
-** General Public License version 2.0 or (at your option) the GNU General
-** Public license version 3 or any later version approved by the KDE Free
-** Qt Foundation. The licenses are as published by the Free Software
-** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
-** included in the packaging of this file. Please review the following
-** information to ensure the GNU General Public License requirements will
-** be met: https://www.gnu.org/licenses/gpl-2.0.html and
-** https://www.gnu.org/licenses/gpl-3.0.html.
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
 #include "desktop_screen_qt.h"
 
@@ -78,12 +42,21 @@ display::Display toDisplayDisplay(int id, const QScreen *screen)
 {
     auto display = display::Display(id, toGfx(screen->geometry()));
     display.set_work_area(toGfx(screen->availableGeometry()));
-    display.set_device_scale_factor(screen->devicePixelRatio());
     display.set_is_monochrome(screen->depth() == 1);
     display.set_color_depth(screen->depth());
     display.set_depth_per_component(8); // FIXME: find the real value
     display.set_display_frequency(std::ceil(screen->refreshRate()));
     display.set_rotation(toDisplayRotation(screen->orientation()));
+
+    // FIXME: support lower scale factor
+    float pixelRatio = screen->devicePixelRatio();
+    if (pixelRatio < 1) {
+        qWarning("Unsupported scale factor (%f) detected on Display%d", pixelRatio, id);
+        display.set_device_scale_factor(qGuiApp->devicePixelRatio());
+    } else {
+        display.set_device_scale_factor(pixelRatio);
+    }
+
     if (screen->nativeOrientation() != Qt::PrimaryOrientation)
         display.set_panel_rotation(toDisplayRotation(screen->nativeOrientation()));
     return display;
@@ -96,7 +69,7 @@ DesktopScreenQt::DesktopScreenQt()
 
 DesktopScreenQt::~DesktopScreenQt()
 {
-    for (auto conn : qAsConst(m_connections))
+    for (auto conn : std::as_const(m_connections))
         QObject::disconnect(conn);
 }
 
@@ -146,14 +119,30 @@ display::Display DesktopScreenQt::GetDisplayNearestWindow(gfx::NativeWindow /*wi
     return GetPrimaryDisplay();
 }
 
-bool DesktopScreenQt::SetScreenSaverSuspended(bool suspend)
+#if defined(USE_XSCREENSAVER)
+class XScreenSuspender : public display::Screen::ScreenSaverSuspender
+{
+public:
+    XScreenSuspender()
+    {
+        ui::SuspendX11ScreenSaver(true);
+    }
+    ~XScreenSuspender() override
+    {
+        ui::SuspendX11ScreenSaver(false);
+    }
+};
+#endif
+#if BUILDFLAG(IS_CHROMEOS_LACROS) || BUILDFLAG(IS_LINUX)
+std::unique_ptr<display::Screen::ScreenSaverSuspender> DesktopScreenQt::SuspendScreenSaver()
 {
 #if defined(USE_XSCREENSAVER)
-    return ui::SuspendX11ScreenSaver(suspend);
+    return std::make_unique<XScreenSuspender>();
 #else
-    return false;
+    return nullptr;
 #endif
 }
+#endif
 
 bool DesktopScreenQt::IsScreenSaverActive() const
 {