sharedtextureprovider_p.h

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// Copyright (C) 2019 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
 
//
//  W A R N I N G
//  -------------
//
// This file is not part of the Qt API.  It exists purely as an
// implementation detail.  This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
 
#ifndef SHAREDTEXTUREPROVIDER_H
#define SHAREDTEXTUREPROVIDER_H
 
#include <QOpenGLFunctions>
#include <QQuickImageProvider>
#include <QtQuick/QSGTexture>
#include <QScopedPointer>
#include <QHash>
 
#include <QtWaylandClient/private/qwaylandserverbufferintegration_p.h>
 
QT_BEGIN_NAMESPACE
 
class TextureSharingExtension;
 
class SharedTextureRegistry : public QObject
{
    Q_OBJECT
public:
    SharedTextureRegistry();
    ~SharedTextureRegistry() override;
 
    const QtWaylandClient::QWaylandServerBuffer *bufferForId(const QString &id) const;
    void requestBuffer(const QString &id);
    void abandonBuffer(const QString &id);
 
    static bool preinitialize();
 
public Q_SLOTS:
    void receiveBuffer(QtWaylandClient::QWaylandServerBuffer *buffer, const QString &id);
 
Q_SIGNALS:
    void replyReceived(const QString &id);
 
private Q_SLOTS:
    void handleExtensionActive();
 
private:
    TextureSharingExtension *m_extension = nullptr;
    QHash<QString, QtWaylandClient::QWaylandServerBuffer *> m_buffers;
    QStringList m_pendingBuffers;
};
 
class SharedTextureProvider : public QQuickAsyncImageProvider
{
public:
    SharedTextureProvider();
    ~SharedTextureProvider() override;
 
    QQuickImageResponse *requestImageResponse(const QString &id, const QSize &requestedSize) override;
 
private:
    SharedTextureRegistry *m_registry = nullptr;
    bool m_sharingAvailable = false;
};
 
QT_END_NAMESPACE
 
#endif // SHAREDTEXTUREPROVIDER_H