qimagepixmapcleanuphooks_p.h

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// Copyright (C) 2016 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
 
#ifndef QIMAGEPIXMAP_CLEANUPHOOKS_P_H
#define QIMAGEPIXMAP_CLEANUPHOOKS_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 <QtGui/private/qtguiglobal_p.h>
#include <QtGui/qpixmap.h>
 
QT_BEGIN_NAMESPACE
 
typedef void (*_qt_image_cleanup_hook_64)(qint64);
typedef void (*_qt_pixmap_cleanup_hook_pmd)(QPlatformPixmap*);
 
 
class QImagePixmapCleanupHooks;
 
class Q_GUI_EXPORT QImagePixmapCleanupHooks
{
public:
    static QImagePixmapCleanupHooks *instance();
 
    static void enableCleanupHooks(const QImage &image);
    static void enableCleanupHooks(const QPixmap &pixmap);
    static void enableCleanupHooks(QPlatformPixmap *handle);
 
    static bool isImageCached(const QImage &image);
    static bool isPixmapCached(const QPixmap &pixmap);
 
    // Gets called when a pixmap data is about to be modified:
    void addPlatformPixmapModificationHook(_qt_pixmap_cleanup_hook_pmd);
 
    // Gets called when a pixmap data is about to be destroyed:
    void addPlatformPixmapDestructionHook(_qt_pixmap_cleanup_hook_pmd);
 
    // Gets called when an image is about to be modified or destroyed:
    void addImageHook(_qt_image_cleanup_hook_64);
 
    void removePlatformPixmapModificationHook(_qt_pixmap_cleanup_hook_pmd);
    void removePlatformPixmapDestructionHook(_qt_pixmap_cleanup_hook_pmd);
    void removeImageHook(_qt_image_cleanup_hook_64);
 
    static void executePlatformPixmapModificationHooks(QPlatformPixmap*);
    static void executePlatformPixmapDestructionHooks(QPlatformPixmap*);
    static void executeImageHooks(qint64 key);
 
private:
    QList<_qt_image_cleanup_hook_64> imageHooks;
    QList<_qt_pixmap_cleanup_hook_pmd> pixmapModificationHooks;
    QList<_qt_pixmap_cleanup_hook_pmd> pixmapDestructionHooks;
};
 
QT_END_NAMESPACE
 
#endif // QIMAGEPIXMAP_CLEANUPHOOKS_P_H