Compositor API: Add xdg-decoration unstable v1 support

And add an example with server-side window decorations.

Task-number: QTBUG-69934
Change-Id: Ic3984b50cf7574cae5135dea51eb4b1c80bb45a7
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

6 files changed, 227 insertions, 0 deletions

diff --git a/examples/wayland/server-side-decoration/doc/src/server-side-decoration.qdoc b/examples/wayland/server-side-decoration/doc/src/server-side-decoration.qdoc
new file mode 100644
index 000000000..7032152d1
--- /dev/null
+++ b/examples/wayland/server-side-decoration/doc/src/server-side-decoration.qdoc
@@ -0,0 +1,36 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:FDL$
+** 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 Free Documentation License Usage
+** Alternatively, this file may be used under the terms of the GNU Free
+** Documentation License version 1.3 as published by the Free Software
+** Foundation and appearing in the file included in the packaging of
+** this file. Please review the following information to ensure
+** the GNU Free Documentation License version 1.3 requirements
+** will be met: https://www.gnu.org/licenses/fdl-1.3.html.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+/*!
+ * \title Qt Wayland Compositor Examples - Sever Side Decoration Compositor
+ * \example server-side-decoration
+ * \brief Server Side Decoration Compositor is a simple example that demonstrates server side window decorations on xdg-shell.
+ * \ingroup qtwaylandcompositor-examples
+ *
+ * Server Side Decoration Compositor is a desktop-style Wayland compositor example implementing
+ * server-side window decorations.
+ */
diff --git a/examples/wayland/server-side-decoration/main.cpp b/examples/wayland/server-side-decoration/main.cpp
new file mode 100644
index 000000000..e765fafb6
--- /dev/null
+++ b/examples/wayland/server-side-decoration/main.cpp
@@ -0,0 +1,68 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * 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.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "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 THE COPYRIGHT
+** OWNER 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtCore/QUrl>
+#include <QtCore/QDebug>
+
+#include <QtGui/QGuiApplication>
+
+#include <QtQml/QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    // ShareOpenGLContexts is needed for using the threaded renderer
+    // on Nvidia EGLStreams
+    QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine appEngine(QUrl("qrc:///main.qml"));
+
+    return app.exec();
+}
diff --git a/examples/wayland/server-side-decoration/main.qml b/examples/wayland/server-side-decoration/main.qml
new file mode 100644
index 000000000..8ec50dd57
--- /dev/null
+++ b/examples/wayland/server-side-decoration/main.qml
@@ -0,0 +1,103 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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.
+**
+** BSD License Usage
+** Alternatively, you may use this file under the terms of the BSD license
+** as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * 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.
+**   * Neither the name of The Qt Company Ltd nor the names of its
+**     contributors may be used to endorse or promote products derived
+**     from this software without specific prior written permission.
+**
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "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 THE COPYRIGHT
+** OWNER 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."
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+import QtQuick 2.6
+import QtQuick.Window 2.2
+import QtQuick.Layouts 1.3
+import QtWayland.Compositor 1.3
+
+WaylandCompositor {
+    // The output defines the screen.
+    WaylandOutput {
+        sizeFollowsWindow: true
+        window: Window {
+            width: 1024
+            height: 768
+            visible: true
+            Repeater {
+                model: shellSurfaces
+                Column {
+                    Rectangle {
+                        visible: modelData.toplevel.decorationMode === XdgToplevel.ServerSideDecoration
+                        width: parent.width
+                        height: 30
+                        gradient: "HeavyRain";
+                        RowLayout {
+                            anchors.fill: parent
+                            Text {
+                                text: modelData.toplevel.title
+                                Layout.fillWidth: true
+                            }
+                            MouseArea {
+                                width: 30
+                                height: 30
+                                Text { text: "X"; anchors.centerIn: parent }
+                                onClicked: modelData.toplevel.sendClose()
+                            }
+                        }
+                    }
+                    ShellSurfaceItem {
+                        moveItem: parent
+                        autoCreatePopupItems: true
+                        shellSurface: modelData
+                        onSurfaceDestroyed: shellSurfaces.remove(index)
+                    }
+                }
+            }
+        }
+    }
+    XdgShell {
+        onToplevelCreated: shellSurfaces.append({shellSurface: xdgSurface});
+    }
+    XdgDecorationManagerV1 {
+        preferredMode: XdgToplevel.ServerSideDecoration
+    }
+    ListModel { id: shellSurfaces }
+}
diff --git a/examples/wayland/server-side-decoration/server-side-decoration.pro b/examples/wayland/server-side-decoration/server-side-decoration.pro
new file mode 100644
index 000000000..e6a5cd20a
--- /dev/null
+++ b/examples/wayland/server-side-decoration/server-side-decoration.pro
@@ -0,0 +1,14 @@
+QT += gui qml
+
+SOURCES += \
+    main.cpp
+
+OTHER_FILES = \
+    main.qml
+
+RESOURCES += server-side-decoration.qrc
+
+target.path = $$[QT_INSTALL_EXAMPLES]/wayland/server-side-decoration
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS server-side-decoration.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/wayland/server-side-decoration
+INSTALLS += target sources
diff --git a/examples/wayland/server-side-decoration/server-side-decoration.qrc b/examples/wayland/server-side-decoration/server-side-decoration.qrc
new file mode 100644
index 000000000..5f6483ac3
--- /dev/null
+++ b/examples/wayland/server-side-decoration/server-side-decoration.qrc
@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+    </qresource>
+</RCC>
diff --git a/examples/wayland/wayland.pro b/examples/wayland/wayland.pro
index 0cb050cca..b9e4263e7 100644
--- a/examples/wayland/wayland.pro
+++ b/examples/wayland/wayland.pro
@@ -14,6 +14,7 @@ qtHaveModule(quick) {
     SUBDIRS += multi-screen
     SUBDIRS += overview-compositor
     SUBDIRS += ivi-compositor
+    SUBDIRS += server-side-decoration
     qtHaveModule(waylandclient) {
         SUBDIRS += \
             custom-extension \