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-/****************************************************************************
-**
-** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
-** All rights reserved.
-** Contact: Nokia Corporation (qt-info@nokia.com)
-**
-** This file is part of the QtQuick3D module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** This file may be used under the terms of the GNU Lesser General Public
-** License version 2.1 as published by the Free Software Foundation and
-** appearing in the file LICENSE.LGPL included in the packaging of this
-** file. Please review the following information to ensure the GNU Lesser
-** General Public License version 2.1 requirements will be met:
-** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
-**
-** In addition, as a special exception, Nokia gives you certain additional
-** rights. These rights are described in the Nokia Qt LGPL Exception
-** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
-**
-** GNU General Public License Usage
-** Alternatively, this file may be used under the terms of the GNU General
-** Public License version 3.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of this
-** file. Please review the following information to ensure the GNU General
-** Public License version 3.0 requirements will be met:
-** http://www.gnu.org/copyleft/gpl.html.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QAREAALLOCATOR_P_H
-#define QAREAALLOCATOR_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 "qt3dglobal.h"
-#include <QtCore/qsize.h>
-#include <QtCore/qrect.h>
-#include <QtCore/qlist.h>
-
-QT_BEGIN_HEADER
-
-QT_BEGIN_NAMESPACE
-
-QT_MODULE(Qt3D)
-
-class Q_QT3D_EXPORT QAreaAllocator
-{
-public:
- QAreaAllocator(const QSize &size);
- virtual ~QAreaAllocator();
-
- QSize size() const { return m_size; }
-
- QSize minimumAllocation() const { return m_minAlloc; }
- void setMinimumAllocation(const QSize &size) { m_minAlloc = size; }
-
- QSize margin() const { return m_margin; }
- void setMargin(const QSize &margin) { m_margin = margin; }
-
- virtual void expand(const QSize &size);
- void expandBy(const QSize &size);
-
- virtual QRect allocate(const QSize &size) = 0;
- virtual QList<QRect> allocate(const QList<QSize> &sizes);
- virtual void release(const QRect &rect);
- virtual void release(const QList<QRect> &rects);
-
- virtual int overhead() const;
-
-protected:
- QSize m_size;
- QSize m_minAlloc;
- QSize m_margin;
-
- QSize roundAllocation(const QSize &size) const;
-};
-
-class Q_QT3D_EXPORT QSimpleAreaAllocator : public QAreaAllocator
-{
-public:
- QSimpleAreaAllocator(const QSize &size);
- virtual ~QSimpleAreaAllocator();
-
- QRect allocate(const QSize &size);
-
-private:
- int m_row;
- int m_column;
- int m_rowHeight;
-};
-
-class Q_QT3D_EXPORT QGeneralAreaAllocator : public QAreaAllocator
-{
-public:
- QGeneralAreaAllocator(const QSize &size);
- virtual ~QGeneralAreaAllocator();
-
- void expand(const QSize &size);
- QRect allocate(const QSize &size);
- void release(const QRect &rect);
- int overhead() const;
-
-private:
- enum Split { SplitOnX, SplitOnY };
-
- struct Node
- {
- QRect rect;
- QSize largestFree;
- Node *parent;
- Node *left;
- Node *right;
- };
-
- Node *m_root;
- int m_nodeCount;
-
- static void freeNode(Node *node);
- QPoint allocateFromNode(const QSize &size, Node *node);
- Node *splitNode(Node *node, Split split);
- static void updateLargestFree(Node *node);
-};
-
-class Q_QT3D_EXPORT QUniformAreaAllocator : public QAreaAllocator
-{
-public:
- QUniformAreaAllocator(const QSize &size, const QSize &uniformSize);
- virtual ~QUniformAreaAllocator();
-
- QSize uniformSize() const { return m_uniformSize; }
-
- void expand(const QSize &size);
- QRect allocate(const QSize &size);
- void release(const QRect &rect);
- int overhead() const;
-
-private:
- QSize m_uniformSize;
- QSize m_gridSize;
- int *m_grid;
- int m_firstFree;
-};
-
-QT_END_NAMESPACE
-
-QT_END_HEADER
-
-#endif