qwltextureorphanage_p.h

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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
 
#ifndef QWLTEXTUREORPHANAGE_P_H
#define QWLTEXTUREORPHANAGE_P_H
 
//
//  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.
//
 
#include <QObject>
#include <QMutex>
#include <QLoggingCategory>
#include <QtWaylandCompositor/qtwaylandcompositorglobal.h>
 
#include <QtCore/qhash.h>
 
QT_BEGIN_NAMESPACE
 
class QOpenGLContext;
class QOpenGLTexture;
 
Q_DECLARE_LOGGING_CATEGORY(qLcWTO)
 
namespace QtWayland {
 
class Q_WAYLANDCOMPOSITOR_EXPORT QWaylandTextureOrphanage : public QObject
{
    Q_OBJECT
 
public:
    QWaylandTextureOrphanage(){};
    ~QWaylandTextureOrphanage();
 
    static QWaylandTextureOrphanage *instance();
 
    // texture that isn't needed anymore will be "take care of" (killed) appropriately
    void admitTexture(QOpenGLTexture *tex, QOpenGLContext *ctx);
 
    // uses QOpenGLContext::currentContext to call deleteTexturesByContext on all shared ctx
    void deleteTextures();
 
public Q_SLOTS:
    // uses sender() to call deleteTexturesByContext
    void onContextAboutToBeDestroyed(QOpenGLContext *ctx);
 
private:
    void deleteTexturesByContext(QOpenGLContext *ctx);
 
    // tracks all the orphanes that need to be deleted
    QMultiHash<QOpenGLContext *, QOpenGLTexture *> m_orphanedTextures;
 
    QMutex m_containerLock;
};
 
} // namespace QtWayland
 
QT_END_NAMESPACE
#endif