/* ============================================================
 *
 * This file is a part of digiKam project
 * http://www.digikam.org
 *
 * Date        : 2005-17-07
 * Description : An invert image threaded image filter.
 *
 * Copyright (C) 2005-2011 by Gilles Caulier <caulier dot gilles at gmail dot com>
 * Copyright (C) 2010 by Martin Klapetek <martin dot klapetek at gmail dot com>
 *
 * This program is free software; you can redistribute it
 * and/or modify it under the terms of the GNU General
 * Public License as published by the Free Software Foundation;
 * either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */

#ifndef INVERTFILTER_H
#define INVERTFILTER_H

// Local includes

#include "digikam_export.h"
#include "dimgthreadedfilter.h"

namespace Digikam
{

class DIGIKAM_EXPORT InvertFilter : public DImgThreadedFilter
{

public:

    explicit InvertFilter(QObject* parent = 0);
    explicit InvertFilter(DImg* orgImage, QObject* parent=0);

    // Constructor for slave mode: execute immediately in current thread with specified master filter
    explicit InvertFilter(DImgThreadedFilter* parentFilter, const DImg& orgImage, DImg& destImage,
                          int progressBegin=0, int progressEnd=100);

    ~InvertFilter();

    void                    readParameters(const FilterAction& action);


    static QString          FilterIdentifier()
    {
        return "digikam:InvertFilter";
    }

    static QString          DisplayableName()
    {
        return I18N_NOOP("Invert Effect");
    }

    static QList<int>       SupportedVersions()
    {
        return QList<int>() << 1;
    }

    static int              CurrentVersion()
    {
        return 1;
    }

    virtual QString         filterIdentifier() const
    {
        return FilterIdentifier();
    }

    virtual FilterAction    filterAction();

private:

    void filterImage();
};

}  // namespace Digikam

#endif /* INVERTFILTER_H */
