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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 QT3DEXTRAS_AREAALLOCATOR_P_H
#define QT3DEXTRAS_AREAALLOCATOR_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.
//
//
// This file is copied from qtdeclarative/src/quick/scenegraph/util/qsgareaallocator_p.h
//
#include <QtCore/qsize.h>
#include <private/qglobal_p.h>
QT_BEGIN_NAMESPACE
class QRect;
class QPoint;
namespace Qt3DExtras {
struct AreaAllocatorNode;
class AreaAllocator
{
public:
AreaAllocator(const QSize &size);
~AreaAllocator();
QRect allocate(const QSize &size);
bool deallocate(const QRect &rect);
bool isEmpty() const { return m_root == 0; }
QSize size() const { return m_size; }
private:
bool allocateInNode(const QSize &size, QPoint &result, const QRect ¤tRect, AreaAllocatorNode *node);
bool deallocateInNode(const QPoint &pos, AreaAllocatorNode *node);
void mergeNodeWithNeighbors(AreaAllocatorNode *node);
AreaAllocatorNode *m_root;
QSize m_size;
};
} // namespace Qt3DExtras
QT_END_NAMESPACE
#endif // QT3DEXTRAS_AREAALLOCATOR_P_H
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