KisSampleRectIterator.h

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/*
 *  SPDX-FileCopyrightText: 2023 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef KISSAMPLERECTITERATOR_H
#define KISSAMPLERECTITERATOR_H
 
#include "kritaglobal_export.h"
 
#include <boost/iterator_adaptors.hpp>
 
#include <QSharedDataPointer>
#include <QRectF>
 
 
class KRITAGLOBAL_EXPORT KisSampleRectIterator
    : public boost::iterator_facade<KisSampleRectIterator,
                                    QPointF,
                                    boost::forward_traversal_tag,
                                    QPointF>
{
public:
    KisSampleRectIterator();
    KisSampleRectIterator(const QRectF &rect);
    KisSampleRectIterator(const KisSampleRectIterator &rhs);
    KisSampleRectIterator(KisSampleRectIterator &&rhs);
    KisSampleRectIterator& operator=(const KisSampleRectIterator &rhs);
    KisSampleRectIterator& operator=(KisSampleRectIterator &&rhs);
    ~KisSampleRectIterator();
 
public:
    int numSamples() const;
 
private:
    friend class boost::iterator_core_access;
 
    void increment();
    QPointF dereference() const;
 
private:
    struct HaltonSampler;
    QSharedDataPointer<HaltonSampler> m_sampler;
 
    QRectF m_rect;
    int m_index = 0;
};
 
#endif // KISSAMPLERECTITERATOR_H