/src/compositor/compositor_api/qwaylandquickhardwarelayer.cpp
C++ | 175 lines | 94 code | 21 blank | 60 comment | 14 complexity | aa670a351f964779cce785d540f8dc14 MD5 | raw file
- /****************************************************************************
- **
- ** Copyright (C) 2018 The Qt Company Ltd.
- ** Contact: https://www.qt.io/licensing/
- **
- ** This file is part of the plugins of the Qt Toolkit.
- **
- ** $QT_BEGIN_LICENSE:GPL$
- ** 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
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- ** and conditions see https://www.qt.io/terms-conditions. For further
- ** information use the contact form at https://www.qt.io/contact-us.
- **
- ** GNU General Public License Usage
- ** Alternatively, this file may be used under the terms of the GNU
- ** General Public License version 3 or (at your option) 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.GPL3
- ** included in the packaging of this file. Please review the following
- ** information to ensure the GNU General Public License requirements will
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- ****************************************************************************/
- #include "qwaylandquickhardwarelayer_p.h"
- #include <QtWaylandCompositor/private/qwlhardwarelayerintegration_p.h>
- #include <QtWaylandCompositor/private/qwlhardwarelayerintegrationfactory_p.h>
- #include <QtCore/private/qobject_p.h>
- #include <QMatrix4x4>
- QT_BEGIN_NAMESPACE
- class QWaylandQuickHardwareLayerPrivate : public QObjectPrivate
- {
- Q_DECLARE_PUBLIC(QWaylandQuickHardwareLayer)
- public:
- QtWayland::HardwareLayerIntegration *layerIntegration();
- QWaylandQuickItem *m_waylandItem = nullptr;
- int m_stackingLevel = 0;
- QMatrix4x4 m_matrixFromRenderThread;
- static QtWayland::HardwareLayerIntegration *s_hardwareLayerIntegration;
- };
- QtWayland::HardwareLayerIntegration *QWaylandQuickHardwareLayerPrivate::s_hardwareLayerIntegration = nullptr;
- QtWayland::HardwareLayerIntegration *QWaylandQuickHardwareLayerPrivate::layerIntegration()
- {
- if (!s_hardwareLayerIntegration) {
- QStringList keys = QtWayland::HardwareLayerIntegrationFactory::keys();
- QString environmentKey = QString::fromLocal8Bit(qgetenv("QT_WAYLAND_HARDWARE_LAYER_INTEGRATION").constData());
- if (!environmentKey.isEmpty()) {
- if (keys.contains(environmentKey)) {
- s_hardwareLayerIntegration = QtWayland::HardwareLayerIntegrationFactory::create(environmentKey, QStringList());
- } else {
- qWarning() << "Unknown hardware layer integration:" << environmentKey
- << "Valid layer integrations are" << keys;
- }
- } else if (!keys.isEmpty()) {
- s_hardwareLayerIntegration = QtWayland::HardwareLayerIntegrationFactory::create(keys.first(), QStringList());
- } else {
- qWarning() << "No wayland hardware layer integrations found";
- }
- }
- return s_hardwareLayerIntegration;
- }
- /*!
- * \qmltype WaylandHardwareLayer
- * \inqmlmodule QtWayland.Compositor
- * \preliminary
- * \brief Makes a parent WaylandQuickItem use hardware layers for rendering.
- *
- * This item needs to be a descendant of a WaylandQuickItem or a derivative,
- * (i.e. ShellSurfaceItem or similar)
- *
- * The Surface of the parent WaylandQuickItem will be drawn in a hardware specific way instead
- * of the regular way using the QtQuick scene graph. On some platforms, the WaylandQuickItem's
- * current buffer and the scene graph can be blended in a separate step. This makes it possible for
- * clients to update continuously without triggering a full redraw of the compositor scene graph for
- * each frame.
- *
- * The preferred hardware layer integration may be overridden by setting the
- * QT_WAYLAND_HARDWARE_LAYER_INTEGRATION environment variable.
- */
- QWaylandQuickHardwareLayer::QWaylandQuickHardwareLayer(QObject *parent)
- : QObject(*new QWaylandQuickHardwareLayerPrivate(), parent)
- {
- }
- QWaylandQuickHardwareLayer::~QWaylandQuickHardwareLayer()
- {
- Q_D(QWaylandQuickHardwareLayer);
- if (d->layerIntegration())
- d->layerIntegration()->remove(this);
- }
- /*!
- * \qmlproperty int QtWaylandCompositor::WaylandHardwareLayer::stackingLevel
- *
- * This property holds the stacking level of this hardware layer relative to other hardware layers,
- * and can be used to sort hardware layers. I.e. a layer with a higher level is rendered on top of
- * one with a lower level.
- *
- * Layers with level 0 will be drawn in an implementation defined order on top of the compositor
- * scene graph.
- *
- * Layers with a level below 0 are drawn beneath the compositor scene graph, if supported by the
- * hardware layer integration.
- */
- int QWaylandQuickHardwareLayer::stackingLevel() const
- {
- Q_D(const QWaylandQuickHardwareLayer);
- return d->m_stackingLevel;
- }
- void QWaylandQuickHardwareLayer::setStackingLevel(int level)
- {
- Q_D(QWaylandQuickHardwareLayer);
- if (level == d->m_stackingLevel)
- return;
- d->m_stackingLevel = level;
- emit stackingLevelChanged();
- }
- QWaylandQuickItem *QWaylandQuickHardwareLayer::waylandItem() const
- {
- Q_D(const QWaylandQuickHardwareLayer);
- return d->m_waylandItem;
- }
- void QWaylandQuickHardwareLayer::classBegin()
- {
- Q_D(QWaylandQuickHardwareLayer);
- for (QObject *p = parent(); p != nullptr; p = p->parent()) {
- if (auto *waylandItem = qobject_cast<QWaylandQuickItem *>(p)) {
- d->m_waylandItem = waylandItem;
- break;
- }
- }
- }
- void QWaylandQuickHardwareLayer::componentComplete()
- {
- Q_D(QWaylandQuickHardwareLayer);
- Q_ASSERT(d->m_waylandItem);
- if (auto integration = d->layerIntegration())
- integration->add(this);
- else
- qWarning() << "No hardware layer integration. WaylandHarwareLayer has no effect.";
- }
- void QWaylandQuickHardwareLayer::setSceneGraphPainting(bool enable)
- {
- waylandItem()->setPaintEnabled(enable);
- }
- // This should be called if QWaylandQuickHardwareLayer used as a native instance, not a qml component.
- void QWaylandQuickHardwareLayer::initialize()
- {
- classBegin();
- componentComplete();
- }
- QT_END_NAMESPACE