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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;
}
/*!
* \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 QtWayland.Compositor::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
#include "moc_qwaylandquickhardwarelayer_p.cpp"
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