imagelevels.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2004-07-29
 * Description : image levels manipulation methods.
 *
 * Copyright (C) 2004-2022 by Gilles Caulier <caulier dot gilles 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 DIGIKAM_IMAGE_LEVELS_H
#define DIGIKAM_IMAGE_LEVELS_H
 
// Qt includes
 
#include <QUrl>
 
// Local includes
 
#include "dcolor.h"
#include "digikam_export.h"
 
namespace Digikam
{
 
class ImageHistogram;
 
class DIGIKAM_EXPORT ImageLevels
{
 
public:
 
    explicit ImageLevels(bool sixteenBit);
    ~ImageLevels();
 
    bool   isDirty();
    bool   isSixteenBits();
    void   reset();
 
    void   levelsChannelReset(int channel);
    void   levelsAuto(ImageHistogram* const hist);
    void   levelsChannelAuto(ImageHistogram* const hist, int channel);
    int    levelsInputFromColor(int channel, const DColor& color);
    void   levelsBlackToneAdjustByColors(int channel, const DColor& color);
    void   levelsGrayToneAdjustByColors(int channel, const DColor& color);
    void   levelsWhiteToneAdjustByColors(int channel, const DColor& color);
    void   levelsCalculateTransfers();
    float  levelsLutFunc(int nchannels, int channel, float value);
    void   levelsLutSetup(int nchannels);
    void   levelsLutProcess(uchar* const srcPR, uchar* const destPR, int w, int h);
 
    void   setLevelGammaValue(int channel, double val);
    void   setLevelLowInputValue(int channel, int val);
    void   setLevelHighInputValue(int channel, int val);
    void   setLevelLowOutputValue(int channel, int val);
    void   setLevelHighOutputValue(int channel, int val);
 
    double getLevelGammaValue(int channel);
    int    getLevelLowInputValue(int channel);
    int    getLevelHighInputValue(int channel);
    int    getLevelLowOutputValue(int channel);
    int    getLevelHighOutputValue(int channel);
 
    bool   saveLevelsToGimpLevelsFile(const QUrl& fileUrl);
    bool   loadLevelsFromGimpLevelsFile(const QUrl& fileUrl);
 
private:
 
    // Disable
    ImageLevels(const ImageLevels&)            = delete;
    ImageLevels& operator=(const ImageLevels&) = delete;
 
private:
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_IMAGE_LEVELS_H