qwaylandquickhardwarelayer.cpp

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// Copyright (C) 2018 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#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;
}
 
QWaylandQuickHardwareLayer::QWaylandQuickHardwareLayer(QObject *parent)
    : QObject(*new QWaylandQuickHardwareLayerPrivate(), parent)
{
}
 
QWaylandQuickHardwareLayer::~QWaylandQuickHardwareLayer()
{
    Q_D(QWaylandQuickHardwareLayer);
    if (d->layerIntegration())
        d->layerIntegration()->remove(this);
}
 
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
 
#include "moc_qwaylandquickhardwarelayer_p.cpp"