1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QIMAGEPIXMAP_CLEANUPHOOKS_P_H 41 #define QIMAGEPIXMAP_CLEANUPHOOKS_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists purely as an 48 // implementation detail. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtGui/private/qtguiglobal_p.h> 55 #include <QtGui/qpixmap.h> 56 57 QT_BEGIN_NAMESPACE 58 59 typedef void (*_qt_image_cleanup_hook_64)(qint64); 60 typedef void (*_qt_pixmap_cleanup_hook_pmd)(QPlatformPixmap*); 61 62 63 class QImagePixmapCleanupHooks; 64 65 class Q_GUI_EXPORT QImagePixmapCleanupHooks 66 { 67 public: 68 static QImagePixmapCleanupHooks *instance(); 69 70 static void enableCleanupHooks(const QImage &image); 71 static void enableCleanupHooks(const QPixmap &pixmap); 72 static void enableCleanupHooks(QPlatformPixmap *handle); 73 74 static bool isImageCached(const QImage &image); 75 static bool isPixmapCached(const QPixmap &pixmap); 76 77 // Gets called when a pixmap data is about to be modified: 78 void addPlatformPixmapModificationHook(_qt_pixmap_cleanup_hook_pmd); 79 80 // Gets called when a pixmap data is about to be destroyed: 81 void addPlatformPixmapDestructionHook(_qt_pixmap_cleanup_hook_pmd); 82 83 // Gets called when an image is about to be modified or destroyed: 84 void addImageHook(_qt_image_cleanup_hook_64); 85 86 void removePlatformPixmapModificationHook(_qt_pixmap_cleanup_hook_pmd); 87 void removePlatformPixmapDestructionHook(_qt_pixmap_cleanup_hook_pmd); 88 void removeImageHook(_qt_image_cleanup_hook_64); 89 90 static void executePlatformPixmapModificationHooks(QPlatformPixmap*); 91 static void executePlatformPixmapDestructionHooks(QPlatformPixmap*); 92 static void executeImageHooks(qint64 key); 93 94 private: 95 QList<_qt_image_cleanup_hook_64> imageHooks; 96 QList<_qt_pixmap_cleanup_hook_pmd> pixmapModificationHooks; 97 QList<_qt_pixmap_cleanup_hook_pmd> pixmapDestructionHooks; 98 }; 99 100 QT_END_NAMESPACE 101 102 #endif // QIMAGEPIXMAP_CLEANUPHOOKS_P_H 103