/*
 * This file is part of the KDE project
 *
 * Copyright (c) 2005 Boudewijn Rempt <boud@valdyas.org>
 *
 *  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 of the License, 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.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

#ifndef _KIS_CIMG_FILTER_H_
#define _KIS_CIMG_FILTER_H_

#include "kis_filter.h"
#include "kis_filter_config_widget.h"
#include "CImg.h"

class KisCImgFilterConfiguration : public KisFilterConfiguration
{

public:

    KisCImgFilterConfiguration();
    virtual TQString toString();
    virtual void fromXML(const TQString & s);
    
public:

    TQ_INT32 nb_iter;    // Number of smoothing iterations
    double dt;         // Time step
    double dlength;    // Integration step
    double dtheta;     // Angular step (in degrees)
    double sigma;      // Structure tensor blurring
    double power1;     // Diffusion limiter along isophote
    double power2;     // Diffusion limiter along gradient
    double gauss_prec; //  Precision of the gaussian function
    bool onormalize; // Output image normalization (in [0,255])
    bool linear;     // Use linear interpolation for integration ?
};


class KisCImgFilter : public KisFilter
{
public:
    KisCImgFilter();
public:
    virtual void process(KisPaintDeviceSP,KisPaintDeviceSP, KisFilterConfiguration* , const TQRect&);
    static inline KisID id() { return KisID("cimg", i18n("Image Restoration (cimg-based)")); };
    virtual bool supportsPainting() { return false; }
    virtual bool supportsPreview() { return false; }
    virtual ColorSpaceIndependence colorSpaceIndependence();
public:
    virtual KisFilterConfigWidget * createConfigurationWidget(TQWidget* parent, KisPaintDeviceSP dev);
    virtual KisFilterConfiguration * configuration(TQWidget*);
    virtual KisFilterConfiguration * configuration() { return new KisCImgFilterConfiguration();};
private:

    bool process();

       // Compute smoothed structure tensor field G
        void compute_smoothed_tensor();

        // Compute normalized tensor field sqrt(T) in G
        void compute_normalized_tensor();

        // Compute LIC's along different angle projections a_\alpha
        void compute_LIC(int &counter);
        void compute_LIC_back_forward(int x, int y);
        void compute_W(float cost, float sint);

        // Average all the LIC's
        void compute_average_LIC();

        // Prepare datas
        bool prepare();
        bool prepare_restore();
        bool prepare_inpaint();
        bool prepare_resize();
        bool prepare_visuflow();

        // Check arguments
        bool check_args();

        // Clean up memory (CImg datas) to save memory
        void cleanup();

private:
        unsigned int nb_iter; // Number of smoothing iterations
        float dt;       // Time step
        float dlength; // Integration step
        float dtheta; // Angular step (in degrees)
        float sigma;  // Structure tensor blurring
        float power1; // Diffusion limiter along isophote
        float power2; // Diffusion limiter along gradient
        float gauss_prec; //  Precision of the gaussian function
        bool onormalize; // Output image normalization (in [0,255])
        bool linear; // Use linear interpolation for integration


        // internal use
        bool restore;
        bool inpaint;
        bool resize;
        const char* visuflow;
        cimg_library::CImg<> dest, sum, W;
        cimg_library::CImg<> img, img0, flow,G;
        cimg_library::CImgl<> eigen;
        cimg_library::CImg<unsigned char> mask;



};

#endif