qsgareaallocator_p.h

Enable keyboard shortcuts

// 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 QSGAREAALLOCATOR_P_H

#define QSGAREAALLOCATOR_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 <private/qtquickglobal_p.h>

#include <QtCore/qsize.h>

QT_BEGIN_NAMESPACE

class QRect;

class QPoint;

struct QSGAreaAllocatorNode;

class Q_QUICK_EXPORT QSGAreaAllocator

public:

    QSGAreaAllocator(const QSize &size, int sliceHeight = 0);

    ~QSGAreaAllocator();

    QRect allocate(const QSize &size);

    bool deallocate(const QRect &rect);

    bool isEmpty() const { return m_root == nullptr; }

    QSize size() const { return m_size; }

    QByteArray serialize();

    const char *deserialize(const char *data, int size);

private:

    bool allocateInNode(const QSize &size, QPoint &result, const QRect &currentRect, QSGAreaAllocatorNode *node);

    bool deallocateInNode(const QPoint &pos, QSGAreaAllocatorNode *node);

    void mergeNodeWithNeighbors(QSGAreaAllocatorNode *node);

    QSGAreaAllocatorNode *m_root;

    QSize m_size;

    int m_sliceHeight;

};

QT_END_NAMESPACE

#endif