/*
 *  This file is part of RawTherapee.
 *
 *  Copyright (c) 2004-2010 Gabor Horvath <hgabor@rawtherapee.com>
 *
 *  RawTherapee 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 3 of the License, or
 *  (at your option) any later version.
 * 
 *  RawTherapee 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 RawTherapee.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "rtengine.h"
#include "rtthumbnail.h"
#include "../rtgui/options.h"
#include "image8.h"
#include <lcms2.h>
#include "curves.h"
#include <glibmm.h>
#include "improcfun.h"
#include "colortemp.h" 
#include "mytime.h"
#include "utils.h"
#include "iccstore.h"
#include "iccmatrices.h"
#include "rawimagesource.h"
#include "stdimagesource.h"
#include <glib/gstdio.h>
#include <csetjmp>
#include "safekeyfile.h"
#include "safegtk.h"
#include "rawimage.h"
#include "jpeg.h"
#include "../rtgui/ppversion.h"

extern Options options;

namespace rtengine {

Thumbnail* Thumbnail::loadFromImage (const Glib::ustring& fname, int &w, int &h, int fixwh, double wbEq) {

    StdImageSource imgSrc;
    if (imgSrc.load(fname)) {
        return NULL;
    }

    ImageIO* img = imgSrc.getImageIO();
  
    Thumbnail* tpp = new Thumbnail ();

    unsigned char* data;
    img->getEmbeddedProfileData (tpp->embProfileLength, data);
    if (data && tpp->embProfileLength) {
        tpp->embProfileData = new unsigned char [tpp->embProfileLength];
        memcpy (tpp->embProfileData, data, tpp->embProfileLength);
    }
    
    tpp->scaleForSave = 8192;
    tpp->defGain = 1.0;
    tpp->gammaCorrected = false;
    tpp->isRaw = 0;
    memset (tpp->colorMatrix, 0, sizeof(tpp->colorMatrix));
    tpp->colorMatrix[0][0] = 1.0;
    tpp->colorMatrix[1][1] = 1.0;
    tpp->colorMatrix[2][2] = 1.0;

    if (fixwh==1) {
        w = h * img->width / img->height;
        tpp->scale = (double)img->height / h;
    }
    else {
        h = w * img->height / img->width;
        tpp->scale = (double)img->width / w;
    }

    // bilinear interpolation
    if (tpp->thumbImg) delete tpp->thumbImg; tpp->thumbImg = NULL;
    tpp->thumbImg = resizeToSameType(w, h, TI_Bilinear, img);

    // histogram computation
    tpp->aeHistCompression = 3;
    tpp->aeHistogram(65536>>tpp->aeHistCompression);

    double avg_r = 0;
    double avg_g = 0;
    double avg_b = 0;
    int n = 0;

    if (img->getType() == rtengine::sImage8) {
        Image8 *image = static_cast<Image8*>(img);
        image->computeHistogramAutoWB(avg_r, avg_g, avg_b, n, tpp->aeHistogram, tpp->aeHistCompression);
    }
    else if (img->getType() == sImage16) {
        Image16 *image = static_cast<Image16*>(img);
        image->computeHistogramAutoWB(avg_r, avg_g, avg_b, n, tpp->aeHistogram, tpp->aeHistCompression);
    }
    else if (img->getType() == sImagefloat) {
        Imagefloat *image = static_cast<Imagefloat*>(img);
        image->computeHistogramAutoWB(avg_r, avg_g, avg_b, n, tpp->aeHistogram, tpp->aeHistCompression);
    }
    else {
        printf("loadFromImage: Unsupported image type \"%s\"!\n", img->getType());
    }

    if (n>0) {
        ColorTemp cTemp;

        tpp->redAWBMul   = avg_r/double(n);
        tpp->greenAWBMul = avg_g/double(n);
        tpp->blueAWBMul  = avg_b/double(n);
        tpp->wbEqual = wbEq;

        cTemp.mul2temp (tpp->redAWBMul, tpp->greenAWBMul, tpp->blueAWBMul, tpp->wbEqual, tpp->autoWBTemp, tpp->autoWBGreen);
    }

    tpp->init ();
    return tpp;
}

Thumbnail* Thumbnail::loadQuickFromRaw (const Glib::ustring& fname, RawMetaDataLocation& rml, int &w, int &h, int fixwh, bool rotate)
{
    RawImage *ri= new RawImage(fname);
    int r = ri->loadRaw(false,false);
    if( r )
    {
        delete ri;
        return NULL;
    }

    rml.exifBase = ri->get_exifBase();
    rml.ciffBase = ri->get_ciffBase();
    rml.ciffLength = ri->get_ciffLen();

    Image8* img = new Image8 ();
    // No sample format detection occurred earlier, so we set them here,
    // as they are mandatory for the setScanline method
    img->setSampleFormat(IIOSF_UNSIGNED_CHAR);
    img->setSampleArrangement(IIOSA_CHUNKY);

    int err = 1;

    // see if it is something we support
    if ( ri->is_supportedThumb() )
    {
        const char* data((const char*)fdata(ri->get_thumbOffset(),ri->get_file()));
        if ( (unsigned char)data[1] == 0xd8 )
        {
            err = img->loadJPEGFromMemory(data,ri->get_thumbLength());
        }
        else
        {
            err = img->loadPPMFromMemory(data,ri->get_thumbWidth(),ri->get_thumbHeight(),ri->get_thumbSwap(),ri->get_thumbBPS());
        }
    }

    // did we succeed?
    if ( err ) 
    {
        printf("loadfromMemory: error\n");
        delete img;
        delete ri;
        return NULL;
    }

    Thumbnail* tpp = new Thumbnail ();

    tpp->isRaw = 1;
    memset (tpp->colorMatrix, 0, sizeof(tpp->colorMatrix));
    tpp->colorMatrix[0][0] = 1.0;
    tpp->colorMatrix[1][1] = 1.0;
    tpp->colorMatrix[2][2] = 1.0;

    if (fixwh==1) {
        w = h * img->width / img->height;
        tpp->scale = (double)img->height / h;
    }
    else {
        h = w * img->height / img->width;
        tpp->scale = (double)img->width / w;
    }

    if (tpp->thumbImg) delete tpp->thumbImg; tpp->thumbImg = NULL;
    tpp->thumbImg = resizeTo<Image8>(w, h, TI_Nearest, img);
    delete img;

    if (rotate && ri->get_rotateDegree() > 0) {
        // Leaf .mos, Mamiya .mef and Phase One files have thumbnails already rotated.
        if (ri->get_maker() != "Leaf" && ri->get_maker() != "Mamiya" && ri->get_maker() != "Phase One")  {
            tpp->thumbImg->rotate(ri->get_rotateDegree());
        }
    }

    tpp->init ();
    delete ri;

    return tpp;
}

#define FISRED(filter,row,col) \
	((filter >> ((((row) << 1 & 14) + ((col) & 1)) << 1) & 3)==0 || !filter)
#define FISGREEN(filter,row,col) \
	((filter >> ((((row) << 1 & 14) + ((col) & 1)) << 1) & 3)==1 || !filter)
#define FISBLUE(filter,row,col) \
	((filter >> ((((row) << 1 & 14) + ((col) & 1)) << 1) & 3)==2 || !filter)

Thumbnail* Thumbnail::loadFromRaw (const Glib::ustring& fname, RawMetaDataLocation& rml, int &w, int &h, int fixwh, double wbEq, bool rotate)
{
	RawImage *ri= new RawImage (fname);
	int r = ri->loadRaw(1,0);
	if( r ){
		delete ri;
		return NULL;
	}
	int width = ri->get_width();
	int height = ri->get_height();
	rtengine::Thumbnail* tpp = new rtengine::Thumbnail;

	tpp->isRaw = true;
	tpp->embProfile = NULL;
	tpp->embProfileData = NULL;
	tpp->embProfileLength = ri->get_profileLen();
	if (ri->get_profileLen())
		tpp->embProfile = cmsOpenProfileFromMem(ri->get_profile(),
				ri->get_profileLen()); //\ TODO check if mutex is needed

	tpp->redMultiplier = ri->get_pre_mul(0);
	tpp->greenMultiplier = ri->get_pre_mul(1);
	tpp->blueMultiplier = ri->get_pre_mul(2);

	ri->scale_colors();
	ri->pre_interpolate();

	rml.exifBase = ri->get_exifBase();
	rml.ciffBase = ri->get_ciffBase();
	rml.ciffLength = ri->get_ciffLen();

	tpp->camwbRed = tpp->redMultiplier / ri->get_pre_mul(0);
	tpp->camwbGreen = tpp->greenMultiplier / ri->get_pre_mul(1);
	tpp->camwbBlue = tpp->blueMultiplier / ri->get_pre_mul(2);
	tpp->defGain= 1.0/ min(ri->get_pre_mul(0), ri->get_pre_mul(1), ri->get_pre_mul(2));
	tpp->gammaCorrected = true;

	unsigned filter = ri->get_filters();
	int firstgreen = 1;
	// locate first green location in the first row
	while (!FISGREEN(filter,1,firstgreen))
		firstgreen++;

	int skip = 1;
	if (ri->get_FujiWidth() != 0){
		if (fixwh == 1) // fix height, scale width
			skip = ((ri->get_height() - ri->get_FujiWidth()) / sqrt(0.5) - firstgreen - 1) / h;
		else
			skip = (ri->get_FujiWidth()/sqrt(0.5) - firstgreen - 1) / w;
	}else{
	if (fixwh == 1) // fix height, scale width
		skip = (ri->get_height() - firstgreen - 1) / h;
	else
		skip = (ri->get_width() - firstgreen - 1) / w;
	}
	if (skip % 2)
		skip--;
	if (skip < 1)
		skip = 1;

	int hskip = skip, vskip = skip;
	if (!ri->get_model().compare("D1X"))
		hskip *= 2;

	int rofs = 0;
	int tmpw = (width - 2) / hskip;
	int tmph = (height - 2) / vskip;

	DCraw::dcrawImage_t image = ri->get_image();

	Imagefloat* tmpImg = new Imagefloat(tmpw, tmph);
	if (ri->isBayer()) {
		for (int row = 1, y = 0; row < height - 1 && y < tmph; row += vskip, y++) {
			rofs = row * width;
			for (int col = firstgreen, x = 0; col < width - 1 && x < tmpw; col+= hskip, x++) {
				int ofs = rofs + col;
				int g = image[ofs][1];
				int r, b;
				if (FISRED(filter,row,col+1)) {
					r = (image[ofs + 1][0] + image[ofs - 1][0]) >> 1;
					b = (image[ofs + width][2] + image[ofs - width][2]) >> 1;
				} else {
					b = (image[ofs + 1][2] + image[ofs - 1][2]) >> 1;
					r = (image[ofs + width][0] + image[ofs - width][0]) >> 1;
				}
				tmpImg->r(y,x) = r;
				tmpImg->g(y,x) = g;
				tmpImg->b(y,x) = b;
			}
		}
	} else {
		for (int row = 1, y = 0; row < height - 1 && y < tmph; row += vskip, y++) {
			rofs = row * width;
			for (int col = firstgreen, x = 0; col < width - 1 && x < tmpw; col
					+= hskip, x++) {
				int ofs = rofs + col;
				tmpImg->r(y,x) = image[ofs][0];
				tmpImg->g(y,x) = image[ofs][1];
				tmpImg->b(y,x) = image[ofs][2];
			}
		}
	}

	if (ri->get_FujiWidth() != 0) {
		int fw = ri->get_FujiWidth() / hskip;
		double step = sqrt(0.5);
		int wide = fw / step;
		int high = (tmph - fw) / step;
		Imagefloat* fImg = new Imagefloat(wide, high);
		float r, c;

		for (int row = 0; row < high; row++)
			for (int col = 0; col < wide; col++) {
				unsigned ur = r = fw + (row - col) * step;
				unsigned uc = c = (row + col) * step;
				if (ur > tmph - 2 || uc > tmpw - 2)
					continue;
				double fr = r - ur;
				double fc = c - uc;
				fImg->r(row,col) = (tmpImg->r(ur,uc) * (1 - fc)
						+ tmpImg->r(ur,uc + 1) * fc) * (1 - fr)
						+ (tmpImg->r(ur + 1,uc) * (1 - fc)
								+ tmpImg->r(ur + 1,uc + 1) * fc) * fr;
				fImg->g(row,col) = (tmpImg->g(ur,uc) * (1 - fc)
						+ tmpImg->g(ur,uc + 1) * fc) * (1 - fr)
						+ (tmpImg->g(ur + 1,uc) * (1 - fc)
								+ tmpImg->g(ur + 1,uc + 1) * fc) * fr;
				fImg->b(row,col) = (tmpImg->b(ur,uc) * (1 - fc)
						+ tmpImg->b(ur,uc + 1) * fc) * (1 - fr)
						+ (tmpImg->b(ur + 1,uc) * (1 - fc)
								+ tmpImg->b(ur + 1,uc + 1) * fc) * fr;
			}
		delete tmpImg;
		tmpImg = fImg;
		tmpw = wide;
		tmph = high;
	}

	if (fixwh == 1) // fix height, scale width
		w = tmpw * h / tmph;
	else
		h = tmph * w / tmpw;
	
	if (tpp->thumbImg) delete tpp->thumbImg; tpp->thumbImg = NULL;
    tpp->thumbImg = resizeTo<Image16>(w, h, TI_Bilinear, tmpImg);
	delete tmpImg;


	if (ri->get_FujiWidth() != 0)
		tpp->scale = (double) (height - ri->get_FujiWidth()) / sqrt(0.5) / h;
	else
		tpp->scale = (double) height / h;

	// generate histogram for auto exposure
	tpp->aeHistCompression = 3;
	tpp->aeHistogram(65536 >> tpp->aeHistCompression);
	tpp->aeHistogram.clear();
	int radd = 4;
	int gadd = 4;
	int badd = 4;
	if (!filter)
		radd = gadd = badd = 1;
	for (int i = 8; i < height - 8; i++) {
		int start, end;
		if (ri->get_FujiWidth() != 0) {
			int fw = ri->get_FujiWidth();
			start = ABS(fw-i) + 8;
			end = min(height + width-fw-i, fw+i) - 8;
		} else {
			start = 8;
			end = width - 8;
		}
		for (int j = start; j < end; j++)
			if (FISGREEN(filter,i,j))
                tpp->aeHistogram[((int)(tpp->camwbGreen*image[i* width+j][1]))>>tpp->aeHistCompression]+=gadd;
			else if (FISRED(filter,i,j))
                tpp->aeHistogram[((int)(tpp->camwbRed * image[i* width+j][0]))>>tpp->aeHistCompression]+=radd;
			else if (FISBLUE(filter,i,j))
                tpp->aeHistogram[((int)(tpp->camwbBlue *image[i* width+j][2]))>>tpp->aeHistCompression]+=badd;
	}

	// generate autoWB
	double avg_r = 0;
	double avg_g = 0;
	double avg_b = 0;
	const float eps=1e-5; //tolerance to avoid dividing by zero

	float rn = eps, gn = eps, bn = eps;

	for (int i = 32; i < height - 32; i++) {
		int start, end;
		if (ri->get_FujiWidth() != 0) {
			int fw = ri->get_FujiWidth();
			start = ABS(fw-i) + 32;
			end = min(height + width-fw-i, fw+i) - 32;
		} else {
			start = 32;
			end = width - 32;
		}
		for (int j = start; j < end; j++) {
			if (FISGREEN(filter,i,j)) {
				double d = tpp->defGain * image[i * width + j][1];
				if (d > 64000.)
					continue;
				avg_g += d;
				gn++;
			}
			else if (FISRED(filter,i,j)) {
				double d = tpp->defGain * image[i * width + j][0];
				if (d > 64000.)
					continue;
				avg_r += d;
				rn++;
			}
			else if (FISBLUE(filter,i,j)) {
				double d = tpp->defGain * image[i * width + j][2];
				if (d > 64000.)
					continue;
				avg_b += d;
				bn++;
			}
		}
	}

	double reds = avg_r / rn * tpp->camwbRed;
	double greens = avg_g / gn * tpp->camwbGreen;
	double blues = avg_b / bn * tpp->camwbBlue;

	tpp->redAWBMul   = ri->get_rgb_cam(0, 0) * reds + ri->get_rgb_cam(0, 1) * greens + ri->get_rgb_cam(0, 2) * blues;
	tpp->greenAWBMul = ri->get_rgb_cam(1, 0) * reds + ri->get_rgb_cam(1, 1) * greens + ri->get_rgb_cam(1, 2) * blues;
	tpp->blueAWBMul  = ri->get_rgb_cam(2, 0) * reds + ri->get_rgb_cam(2, 1) * greens + ri->get_rgb_cam(2, 2) * blues;
	tpp->wbEqual = wbEq;

	ColorTemp cTemp;
	cTemp.mul2temp(tpp->redAWBMul, tpp->greenAWBMul, tpp->blueAWBMul, tpp->wbEqual, tpp->autoWBTemp, tpp->autoWBGreen);

	if (rotate && ri->get_rotateDegree() > 0) {
		tpp->thumbImg->rotate(ri->get_rotateDegree());
	}

	for (int a = 0; a < 3; a++)
		for (int b = 0; b < 3; b++)
			tpp->colorMatrix[a][b] = ri->get_rgb_cam(a, b);

	tpp->init();
	delete ri;
	return tpp;
}
#undef FISRED
#undef FISGREEN
#undef FISBLUE


unsigned short *Thumbnail::igammatab = 0;
unsigned char  *Thumbnail::gammatab  = 0;

void Thumbnail::initGamma () {
    igammatab = new unsigned short[256];
    gammatab = new unsigned char[65536];
    for (int i=0; i<256; i++)
        igammatab[i] = (unsigned short)(255.0*pow((double)i/255.0,Color::sRGBGamma));
    for (int i=0; i<65536; i++)
        gammatab[i] = (unsigned char)(255.0*pow((double)i/65535.0,1.f/Color::sRGBGamma));
}

void Thumbnail::cleanupGamma () {
    delete [] igammatab;
    delete [] gammatab;
}

void Thumbnail::init () {

    RawImageSource::inverse33 (colorMatrix, iColorMatrix);
	//colorMatrix is rgb_cam
    memset (cam2xyz, 0, sizeof(cam2xyz));
    for (int i=0; i<3; i++)
        for (int j=0; j<3; j++)
            for (int k=0; k<3; k++)
                cam2xyz[i][j] += xyz_sRGB[i][k] * colorMatrix[k][j];
    camProfile = iccStore->createFromMatrix (cam2xyz, false, "Camera");
}

Thumbnail::Thumbnail () :
    camProfile(NULL), thumbImg(NULL),
    camwbRed(1.0), camwbGreen(1.0), camwbBlue(1.0),
    redAWBMul(-1.0), greenAWBMul(-1.0), blueAWBMul(-1.0),
    autoWBTemp(2700), autoWBGreen(1.0), wbEqual(-1.0),
    embProfileLength(0), embProfileData(NULL), embProfile(NULL),
    redMultiplier(1.0), greenMultiplier(1.0), blueMultiplier(1.0),
    defGain(1.0),
    scaleForSave(8192),
    gammaCorrected(false) {
}

Thumbnail::~Thumbnail () {

    delete thumbImg;
    //delete [] aeHistogram;
    delete [] embProfileData;
    if (embProfile)
        cmsCloseProfile(embProfile);
    if (camProfile)
        cmsCloseProfile(camProfile);
}

// Simple processing of RAW internal JPGs
IImage8* Thumbnail::quickProcessImage (const procparams::ProcParams& params, int rheight, rtengine::TypeInterpolation interp, double& myscale) {

    int rwidth;
    if (params.coarse.rotate==90 || params.coarse.rotate==270) {
        rwidth = rheight;
        rheight = thumbImg->height * rwidth / thumbImg->width;
    }
    else 
        rwidth = thumbImg->width * rheight / thumbImg->height;

    Image8* baseImg = resizeTo<Image8>(rwidth, rheight, interp, thumbImg);

    if (params.coarse.rotate)
        baseImg->rotate (params.coarse.rotate);

    if (params.coarse.hflip)
        baseImg->hflip ();

    if (params.coarse.vflip)
        baseImg->vflip ();
    return baseImg;
}

// Full thumbnail processing, second stage if complete profile exists
IImage8* Thumbnail::processImage (const procparams::ProcParams& params, int rheight, TypeInterpolation interp, std::string camName, 
    double focalLen, double focalLen35mm, float focusDist, float shutter, float fnumber, float iso,std::string expcomp_, double& myscale) {

    // check if the WB's equalizer value has changed
    if (wbEqual < (params.wb.equal-5e-4) || wbEqual > (params.wb.equal+5e-4)) {
        wbEqual = params.wb.equal;
        // recompute the autoWB
        ColorTemp cTemp;
        cTemp.mul2temp (redAWBMul, greenAWBMul, blueAWBMul, wbEqual, autoWBTemp, autoWBGreen);
    }

    // compute WB multipliers
    ColorTemp currWB = ColorTemp (params.wb.temperature, params.wb.green, params.wb.equal,params.wb.method);
    if (params.wb.method=="Camera") {
        //recall colorMatrix is rgb_cam
        double cam_r = colorMatrix[0][0]*camwbRed + colorMatrix[0][1]*camwbGreen + colorMatrix[0][2]*camwbBlue;
        double cam_g = colorMatrix[1][0]*camwbRed + colorMatrix[1][1]*camwbGreen + colorMatrix[1][2]*camwbBlue;
        double cam_b = colorMatrix[2][0]*camwbRed + colorMatrix[2][1]*camwbGreen + colorMatrix[2][2]*camwbBlue;
        currWB = ColorTemp (cam_r, cam_g, cam_b, params.wb.equal);
    }
    else if (params.wb.method=="Auto")
        currWB = ColorTemp (autoWBTemp, autoWBGreen, wbEqual, "Custom");
    double r, g, b;
    currWB.getMultipliers (r, g, b);
    //iColorMatrix is cam_rgb
    double rm = iColorMatrix[0][0]*r + iColorMatrix[0][1]*g + iColorMatrix[0][2]*b;
    double gm = iColorMatrix[1][0]*r + iColorMatrix[1][1]*g + iColorMatrix[1][2]*b;
    double bm = iColorMatrix[2][0]*r + iColorMatrix[2][1]*g + iColorMatrix[2][2]*b;
    rm = camwbRed / rm;
    gm = camwbGreen / gm;
    bm = camwbBlue / bm;
    double mul_lum = 0.299*rm + 0.587*gm + 0.114*bm;
    double logDefGain = log(defGain) / log(2.0);
    int rmi, gmi, bmi;
    // Since HL recovery is not rendered in thumbs
//    if (!isRaw || !params.hlrecovery.enabled) {
        logDefGain = 0.0;
        rmi = 1024.0 * rm * defGain / mul_lum;
        gmi = 1024.0 * gm * defGain / mul_lum;
        bmi = 1024.0 * bm * defGain / mul_lum;
/*    }
    else {
        rmi = 1024.0 * rm / mul_lum;
        gmi = 1024.0 * gm / mul_lum;
        bmi = 1024.0 * bm / mul_lum;
    }*/

    // The RAW exposure is not reflected since it's done in preprocessing. If we only have e.g. the chached thumb,
    // that is already preprocessed. So we simulate the effect here roughly my modifying the exposure accordingly
    if (isRaw && fabs(1.0-params.raw.expos)>0.001) {
        rmi*=params.raw.expos;
        gmi*=params.raw.expos;
        bmi*=params.raw.expos;
    }

    // resize to requested width and perform coarse transformation
    int rwidth;
    if (params.coarse.rotate==90 || params.coarse.rotate==270) {
        rwidth = rheight;
        rheight = int(size_t(thumbImg->height) * size_t(rwidth) / size_t(thumbImg->width));
    }
    else 
        rwidth = int(size_t(thumbImg->width) * size_t(rheight) / size_t(thumbImg->height));

    Imagefloat* baseImg = resizeTo<Imagefloat>(rwidth, rheight, interp, thumbImg);

    if (params.coarse.rotate) {
        baseImg->rotate (params.coarse.rotate);
        rwidth = baseImg->width;
        rheight = baseImg->height;
    }

    if (params.coarse.hflip)
        baseImg->hflip ();

    if (params.coarse.vflip)
        baseImg->vflip ();

    // apply white balance and raw white point (simulated)
    int val;
    unsigned short val_;
    for (int i=0; i<rheight; i++)
        for (int j=0; j<rwidth; j++) {

            baseImg->convertTo(baseImg->r(i,j), val_);
            val = static_cast<int>(val_)*rmi>>10;
            baseImg->r(i,j) = CLIP(val);

            baseImg->convertTo(baseImg->g(i,j), val_);
            val = static_cast<int>(val_)*gmi>>10;
            baseImg->g(i,j) = CLIP(val);

            baseImg->convertTo(baseImg->b(i,j), val_);
            val = static_cast<int>(val_)*bmi>>10;
            baseImg->b(i,j) = CLIP(val);
        }

/*
    // apply highlight recovery, if needed		-- CURRENTLY BROKEN DUE TO INCOMPATIBLE DATA TYPES; DO WE CARE???
    if (isRaw && params.hlrecovery.enabled) {
        int maxval = 65535 / defGain;
        if (params.hlrecovery.method=="Luminance" || params.hlrecovery.method=="Color") 
            for (int i=0; i<rheight; i++)
                RawImageSource::HLRecovery_Luminance (baseImg->r[i], baseImg->g[i], baseImg->b[i], baseImg->r[i], baseImg->g[i], baseImg->b[i], rwidth, maxval);
        else if (params.hlrecovery.method=="CIELab blending") {
            double icamToD50[3][3];
            RawImageSource::inverse33 (cam2xyz, icamToD50);
            for (int i=0; i<rheight; i++)
                RawImageSource::HLRecovery_CIELab (baseImg->r[i], baseImg->g[i], baseImg->b[i], baseImg->r[i], baseImg->g[i], baseImg->b[i], rwidth, maxval, cam2xyz, icamToD50);
        }
    }
*/

    // if luma denoise has to be done for thumbnails, it should be right here

    // perform color space transformation
    if (isRaw)
        RawImageSource::colorSpaceConversion (baseImg, params.icm, embProfile, camProfile, cam2xyz, camName );
    else
        StdImageSource::colorSpaceConversion (baseImg, params.icm, embProfile, thumbImg->getSampleFormat());

    int fw = baseImg->width;
    int fh = baseImg->height;
    //ColorTemp::CAT02 (baseImg, &params)	;//perhaps not good!

    ImProcFunctions ipf (&params, false);
    ipf.setScale (sqrt(double(fw*fw+fh*fh))/sqrt(double(thumbImg->width*thumbImg->width+thumbImg->height*thumbImg->height))*scale);

    LUTu hist16 (65536);
    LUTu hist16C (65536);

	double gamma = isRaw ? Color::sRGBGamma : 0;  // usually in ImageSource, but we don't have that here
    ipf.firstAnalysis (baseImg, &params, hist16,  gamma);

    // perform transform
    if (ipf.needsTransform()) {
        Imagefloat* trImg = new Imagefloat (fw, fh);
        ipf.transform (baseImg, trImg, 0, 0, 0, 0, fw, fh, focalLen, focalLen35mm, focusDist, 0, true);  // Raw rotate degree not detectable here
        delete baseImg;
        baseImg = trImg;
    }
    
    // update blurmap
    SHMap* shmap = NULL;
    if (params.sh.enabled) {
        shmap = new SHMap (fw, fh, false);
        double radius = sqrt (double(fw*fw+fh*fh)) / 2.0;
        double shradius = params.sh.radius;
		if (!params.sh.hq) shradius *= radius / 1800.0;
        shmap->update (baseImg, shradius, ipf.lumimul, params.sh.hq, 16);
    }
    
    // RGB processing
    double	expcomp = params.toneCurve.expcomp;
    int		bright = params.toneCurve.brightness;
	int		contr = params.toneCurve.contrast;
	int		black = params.toneCurve.black;
	int		hlcompr = params.toneCurve.hlcompr;
	int		hlcomprthresh = params.toneCurve.hlcomprthresh;
	
    if (params.toneCurve.autoexp && aeHistogram) {
	    ipf.getAutoExp (aeHistogram, aeHistCompression, logDefGain, params.toneCurve.clip, expcomp, bright, contr, black, hlcompr, hlcomprthresh);
	    //ipf.getAutoExp (aeHistogram, aeHistCompression, logDefGain, params.toneCurve.clip, params.toneCurve.expcomp, params.toneCurve.brightness, params.toneCurve.contrast, params.toneCurve.black, params.toneCurve.hlcompr);
    }

	LUTf curve1 (65536);
	LUTf curve2 (65536);
	LUTf curve (65536);
	LUTf satcurve (65536);
	LUTf lhskcurve (65536);
	
	LUTf rCurve (65536);
	LUTf gCurve (65536);
	LUTf bCurve (65536);

	LUTu dummy;

	ToneCurve customToneCurve1, customToneCurve2;
    ColorAppearance customColCurve1;
    ColorAppearance customColCurve2;
    ColorAppearance customColCurve3;

	ipf.g = gamma;
	ipf.iGamma = true;
	CurveFactory::complexCurve (expcomp, black/65535.0, hlcompr, hlcomprthresh,
								params.toneCurve.shcompr, bright, contr, ipf.g, !ipf.iGamma,
								params.toneCurve.curveMode, params.toneCurve.curve,
								params.toneCurve.curveMode2, params.toneCurve.curve2,
								hist16, dummy, curve1, curve2, curve, dummy, customToneCurve1, customToneCurve2, 16);
	
	CurveFactory::RGBCurve (params.rgbCurves.rcurve, rCurve, 16);
	CurveFactory::RGBCurve (params.rgbCurves.gcurve, gCurve, 16);
	CurveFactory::RGBCurve (params.rgbCurves.bcurve, bCurve, 16);
	
	LabImage* labView = new LabImage (fw,fh);
	CieImage* cieView = new CieImage (fw,fh);

    ipf.rgbProc (baseImg, labView, curve1, curve2, curve, shmap, params.toneCurve.saturation, rCurve, gCurve, bCurve, customToneCurve1, customToneCurve2, expcomp, hlcompr, hlcomprthresh);

    if (shmap)
        delete shmap;

    // luminance histogram update
    hist16.clear();hist16C.clear();
    for (int i=0; i<fh; i++)
        for (int j=0; j<fw; j++){
            hist16[CLIP((int)((labView->L[i][j])))]++;
            hist16C=CLIP((int)sqrt(labView->a[i][j]*labView->a[i][j] + labView->b[i][j]*labView->b[i][j]));
			}
    // luminance processing
//	ipf.EPDToneMap(labView,0,6);
	
	bool utili=false;
	bool autili=false;
	bool butili=false;
	bool ccutili=false;
	bool cclutili=false;
    CurveFactory::complexLCurve (params.labCurve.brightness, params.labCurve.contrast, params.labCurve.lcurve, 
        hist16, hist16, curve, dummy, 16, utili);
    CurveFactory::complexsgnCurve (autili, butili, ccutili, cclutili, params.labCurve.chromaticity, params.labCurve.rstprotection,
								   params.labCurve.acurve, params.labCurve.bcurve,params.labCurve.cccurve,params.labCurve.lccurve, curve1, curve2, satcurve,lhskcurve, 
									hist16C, hist16C, dummy,  
								   16);
    //ipf.luminanceCurve (labView, labView, curve);
    ipf.chromiLuminanceCurve (1,labView, labView, curve1, curve2, satcurve,lhskcurve, curve, utili, autili, butili, ccutili,cclutili, dummy);
	
	ipf.vibrance(labView);
	int begh = 0, endh = labView->H;

	if((params.colorappearance.enabled && !params.colorappearance.tonecie) || !params.colorappearance.enabled) ipf.EPDToneMap(labView,5,6);

	//if(!params.colorappearance.enabled){ipf.EPDToneMap(labView,5,6);}
	
	CurveFactory::curveLightBrightColor (
					params.colorappearance.curveMode, params.colorappearance.curve,
					params.colorappearance.curveMode2, params.colorappearance.curve2,
					params.colorappearance.curveMode3, params.colorappearance.curve3,
					hist16, hist16, dummy,
					hist16C, hist16C, dummy,
					customColCurve1,
					customColCurve2, 
					customColCurve3, 
					16);

	int f_h=2,f_w=2;
	if(params.colorappearance.enabled){
	float** buffer = new float*[fh];
	for (int i=0; i<fh; i++)
		buffer[i] = new float[fw];
	bool execsharp=false;
	float d;
	float fnum = fnumber;// F number
	float fiso = iso;// ISO
	float fspeed = shutter;//speed 
	char * writ = new char[expcomp_.size() + 1];//convert expcomp_ to char
	std::copy(expcomp_.begin(), expcomp_.end(), writ);
	writ[expcomp_.size()] = '\0'; 
	float fcomp = atof(writ); //compensation + -
	delete[] writ;
	float adap2,adap;
	double ada, ada2;
	if(fnum < 0.3f || fiso < 5.f || fspeed < 0.00001f) {adap=adap=2000.f;ada=2000.;}//if no exif data or wrong
	else {
	float E_V = fcomp + log2 ((fnum*fnum) / fspeed / (fiso/100.f));
	float expo2= params.toneCurve.expcomp;// exposure compensation in tonecurve ==> direct EV
	E_V += expo2;
	float expo1;//exposure raw white point
	expo1=log2(params.raw.expos);//log2 ==>linear to EV
	E_V += expo1;
	adap2 = adap= powf(2.f, E_V-3.f);//cd / m2
	ada=ada2=(double) adap;
	//end calculation adaptation scene luminosity
	}

	ipf.ciecam_02float (cieView, adap, begh, endh, 1, 2, labView, &params,customColCurve1,customColCurve2,customColCurve3, dummy, dummy, 5, 6, (float**)buffer, execsharp, d);
	for (int i=0; i<fh; i++)
		delete [] buffer[i];
	delete [] buffer; buffer=NULL;
	}
    // color processing
    //ipf.colorCurve (labView, labView);

    // obtain final image
    Image8* readyImg = new Image8 (fw, fh);
    ipf.lab2monitorRgb (labView, readyImg);
    delete labView;
    delete baseImg;
    delete cieView;
    // calculate scale
    if (params.coarse.rotate==90 || params.coarse.rotate==270) 
        myscale = scale * thumbImg->width / fh;
    else
        myscale = scale * thumbImg->height / fh;

    myscale = 1.0 / myscale;

/*    // apply crop
    if (params.crop.enabled) {
        int ix = 0;
        for (int i=0; i<fh; i++) 
            for (int j=0; j<fw; j++)
                if (i<params.crop.y/myscale || i>(params.crop.y+params.crop.h)/myscale || j<params.crop.x/myscale || j>(params.crop.x+params.crop.w)/myscale) {
                    readyImg->data[ix++] /= 3;
                    readyImg->data[ix++] /= 3;
                    readyImg->data[ix++] /= 3;
                }
                else
                    ix += 3;
    }*/
    return readyImg;
}

int Thumbnail::getImageWidth (const procparams::ProcParams& params, int rheight, float &ratio) {
	if (thumbImg==NULL) return 0;  // Can happen if thumb is just building and GUI comes in with resize wishes

    int rwidth;
    if (params.coarse.rotate==90 || params.coarse.rotate==270) {
    	ratio = (float)(thumbImg->height) / (float)(thumbImg->width);
    }
    else {
    	ratio = (float)(thumbImg->width) / (float)(thumbImg->height);
    }
    rwidth = (int)(ratio * (float)rheight);

    return rwidth;
}

void Thumbnail::getDimensions (int& w, int& h, double& scaleFac) {
    if (thumbImg) {
        w=thumbImg->width; h=thumbImg->height; scaleFac=scale;
    } else {
        w=0; h=0; scale=1;
    }
}

void Thumbnail::getCamWB (double& temp, double& green) {

    double cam_r = colorMatrix[0][0]*camwbRed + colorMatrix[0][1]*camwbGreen + colorMatrix[0][2]*camwbBlue;
    double cam_g = colorMatrix[1][0]*camwbRed + colorMatrix[1][1]*camwbGreen + colorMatrix[1][2]*camwbBlue;
    double cam_b = colorMatrix[2][0]*camwbRed + colorMatrix[2][1]*camwbGreen + colorMatrix[2][2]*camwbBlue;
    ColorTemp currWB = ColorTemp (cam_r, cam_g, cam_b, 1.0);  // we do not take the equalizer into account here, because we want camera's WB
    temp = currWB.getTemp ();
    green = currWB.getGreen ();
}

void Thumbnail::getAutoWB (double& temp, double& green, double equal) {

    if (equal != wbEqual) {
        // compute the values depending on equal
        ColorTemp cTemp;
        wbEqual = equal;
        // compute autoWBTemp and autoWBGreen
        cTemp.mul2temp(redAWBMul, greenAWBMul, blueAWBMul, wbEqual, autoWBTemp, autoWBGreen);
    }
    temp = autoWBTemp;
    green = autoWBGreen;
}

void Thumbnail::getAutoWBMultipliers (double& rm, double& gm, double& bm) {
    rm = redAWBMul;
    gm = greenAWBMul;
    bm = blueAWBMul;
}

void Thumbnail::applyAutoExp (procparams::ProcParams& params) {

    if (params.toneCurve.autoexp && aeHistogram) {
        ImProcFunctions ipf (&params, false);
        ipf.getAutoExp (aeHistogram, aeHistCompression, log(defGain)/log(2.0), params.toneCurve.clip, params.toneCurve.expcomp,
						params.toneCurve.brightness, params.toneCurve.contrast, params.toneCurve.black, params.toneCurve.hlcompr, params.toneCurve.hlcomprthresh);
    }
}

void Thumbnail::getSpotWB (const procparams::ProcParams& params, int xp, int yp, int rect, double& rtemp, double& rgreen) {

    std::vector<Coord2D> points, red, green, blue;
    for (int i=yp-rect; i<=yp+rect; i++)
        for (int j=xp-rect; j<=xp+rect; j++) 
            points.push_back (Coord2D (j, i));

    int fw = thumbImg->width, fh = thumbImg->height;
    if (params.coarse.rotate==90 || params.coarse.rotate==270) {
        fw = thumbImg->height;
        fh = thumbImg->width;
    }
    ImProcFunctions ipf (&params, false);
    ipf.transCoord (fw, fh, points, red, green, blue);
    int tr = TR_NONE;
    if (params.coarse.rotate==90)  tr |= TR_R90;
    if (params.coarse.rotate==180) tr |= TR_R180;
    if (params.coarse.rotate==270) tr |= TR_R270;
    if (params.coarse.hflip)       tr |= TR_HFLIP;
    if (params.coarse.vflip)       tr |= TR_VFLIP;

    // calculate spot wb (copy & pasted from stdimagesource)
    double reds = 0, greens = 0, blues = 0;
    int rn = 0, gn = 0, bn = 0;
    thumbImg->getSpotWBData(reds, greens, blues, rn, gn, bn, red, green, blue, tr);
    reds = reds/rn * camwbRed;
    greens = greens/gn * camwbGreen;
    blues = blues/bn * camwbBlue;

    double rm = colorMatrix[0][0]*reds + colorMatrix[0][1]*greens + colorMatrix[0][2]*blues;
    double gm = colorMatrix[1][0]*reds + colorMatrix[1][1]*greens + colorMatrix[1][2]*blues;
    double bm = colorMatrix[2][0]*reds + colorMatrix[2][1]*greens + colorMatrix[2][2]*blues;

    ColorTemp ct (rm, gm, bm, params.wb.equal);
    rtemp = ct.getTemp ();
    rgreen = ct.getGreen ();
}
void Thumbnail::transformPixel (int x, int y, int tran, int& tx, int& ty) {
    
    int W = thumbImg->width;
    int H = thumbImg->height;
    int sw = W, sh = H;  
    if ((tran & TR_ROT) == TR_R90 || (tran & TR_ROT) == TR_R270) {
        sw = H;
        sh = W;
    }

    int ppx = x, ppy = y;
    if (tran & TR_HFLIP) 
        ppx = sw - 1 - x ;
    if (tran & TR_VFLIP) 
        ppy = sh - 1 - y;
    
    tx = ppx;
    ty = ppy;
    
    if ((tran & TR_ROT) == TR_R180) {
        tx = W - 1 - ppx;
        ty = H - 1 - ppy;
    }
    else if ((tran & TR_ROT) == TR_R90) {
        tx = ppy;
        ty = H - 1 - ppx;
    }
    else if ((tran & TR_ROT) == TR_R270) {
        tx = W - 1 - ppy;
        ty = ppx;
    }
    tx/=scale;
    ty/=scale;
}

unsigned char* Thumbnail::getGrayscaleHistEQ (int trim_width) {
    if (!thumbImg)
        return NULL;

    if (thumbImg->width<trim_width)
        return NULL;
    
    // to utilize the 8 bit color range of the thumbnail we brighten it and apply gamma correction
    unsigned char* tmpdata = new unsigned char[thumbImg->height*trim_width];
    int ix = 0,max;

    if (gammaCorrected) {
        // if it's gamma correct (usually a RAW), we have the problem that there is a lot noise etc. that makes the maximum way too high.
        // Strategy is limit a certain percent of pixels so the overall picture quality when scaling to 8 bit is way better
        const double BurnOffPct=0.03;  // *100 = percent pixels that may be clipped

        // Calc the histogram
        unsigned int* hist16 = new unsigned int [65536];
        memset(hist16,0,sizeof(int)*65536);

        if (thumbImg->getType() == sImage8) {
            Image8 *image = static_cast<Image8*>(thumbImg);
            image->calcGrayscaleHist(hist16);
        }
        else if (thumbImg->getType() == sImage16) {
            Image16 *image = static_cast<Image16*>(thumbImg);
            image->calcGrayscaleHist(hist16);
        }
        else if (thumbImg->getType() == sImagefloat) {
            Imagefloat *image = static_cast<Imagefloat*>(thumbImg);
            image->calcGrayscaleHist(hist16);
        }
        else {
            printf("getGrayscaleHistEQ #1: Unsupported image type \"%s\"!\n", thumbImg->getType());
        }

        // Go down till we cut off that many pixels
        unsigned long cutoff = thumbImg->height * thumbImg->height * 4 * BurnOffPct;

        int max_;
        unsigned long sum=0;
        for (max_=65535; max_>16384 && sum<cutoff; max_--) sum+=hist16[max_];

        delete[] hist16;

        scaleForSave = 65535*8192 / max_;

        // Correction and gamma to 8 Bit
        if (thumbImg->getType() == sImage8) {
            Image8 *image = static_cast<Image8*>(thumbImg);
            for (int i=0; i<thumbImg->height; i++)
                for (int j=(thumbImg->width-trim_width)/2; j<trim_width+(thumbImg->width-trim_width)/2; j++) {
                    unsigned short r_, g_, b_;
                    image->convertTo(image->r(i,j), r_);
                    image->convertTo(image->g(i,j), g_);
                    image->convertTo(image->b(i,j), b_);
                    int r= gammatab[min(r_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int g= gammatab[min(g_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int b= gammatab[min(b_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    tmpdata[ix++] = (r*19595+g*38469+b*7472) >> 16;
                }
        }
        else if (thumbImg->getType() == sImage16) {
            Image16 *image = static_cast<Image16*>(thumbImg);
            for (int i=0; i<thumbImg->height; i++)
                for (int j=(thumbImg->width-trim_width)/2; j<trim_width+(thumbImg->width-trim_width)/2; j++) {
                    unsigned short r_, g_, b_;
                    image->convertTo(image->r(i,j), r_);
                    image->convertTo(image->g(i,j), g_);
                    image->convertTo(image->b(i,j), b_);
                    int r= gammatab[min(r_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int g= gammatab[min(g_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int b= gammatab[min(b_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    tmpdata[ix++] = (r*19595+g*38469+b*7472) >> 16;
                }
        }
        else if (thumbImg->getType() == sImagefloat) {
            Imagefloat *image = static_cast<Imagefloat*>(thumbImg);
            for (int i=0; i<thumbImg->height; i++)
                for (int j=(thumbImg->width-trim_width)/2; j<trim_width+(thumbImg->width-trim_width)/2; j++) {
                    unsigned short r_, g_, b_;
                    image->convertTo(image->r(i,j), r_);
                    image->convertTo(image->g(i,j), g_);
                    image->convertTo(image->b(i,j), b_);
                    int r= gammatab[min(r_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int g= gammatab[min(g_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    int b= gammatab[min(b_,static_cast<unsigned short>(max_)) * scaleForSave >> 13];
                    tmpdata[ix++] = (r*19595+g*38469+b*7472) >> 16;
                }
        }
    }
    else {
        // If it's not gamma corrected (usually a JPG) we take the normal maximum
        max=0;

        if (thumbImg->getType() == sImage8) {
            Image8 *image = static_cast<Image8*>(thumbImg);
            unsigned char max_=0;

            for (int row=0; row<image->height; row++)
                for (int col=0; col<image->width; col++) {
                    if (image->r(row,col)>max_) max_ = image->r(row,col);
                    if (image->g(row,col)>max_) max_ = image->g(row,col);
                    if (image->b(row,col)>max_) max_ = image->b(row,col);
                }
            image->convertTo(max_, max);

            if (max < 16384) max = 16384;
            scaleForSave = 65535*8192 / max;

            // Correction and gamma to 8 Bit
            for (int i=0; i<image->height; i++)
                for (int j=(image->width-trim_width)/2; j<trim_width+(image->width-trim_width)/2; j++) {
                    unsigned short rtmp, gtmp, btmp;
                    image->convertTo(image->r(i,j), rtmp);
                    image->convertTo(image->g(i,j), gtmp);
                    image->convertTo(image->b(i,j), btmp);
                    int r = rtmp * scaleForSave >> 21;
                    int g = gtmp * scaleForSave >> 21;
                    int b = btmp * scaleForSave >> 21;
                    tmpdata[ix++] = (r*19595+g*38469+b*7472)>>16;
                }
        }
        else if (thumbImg->getType() == sImage16) {
            Image16 *image = static_cast<Image16*>(thumbImg);
            unsigned short max_=0;

            for (int row=0; row<image->height; row++)
                for (int col=0; col<image->width; col++) {
                    if (image->r(row,col)>max_) max_ = image->r(row,col);
                    if (image->g(row,col)>max_) max_ = image->g(row,col);
                    if (image->b(row,col)>max_) max_ = image->b(row,col);
                }
            image->convertTo(max_, max);

            if (max < 16384) max = 16384;
            scaleForSave = 65535*8192 / max;

            // Correction and gamma to 8 Bit
            for (int i=0; i<image->height; i++)
                for (int j=(image->width-trim_width)/2; j<trim_width+(image->width-trim_width)/2; j++) {
                    unsigned short rtmp, gtmp, btmp;
                    image->convertTo(image->r(i,j), rtmp);
                    image->convertTo(image->g(i,j), gtmp);
                    image->convertTo(image->b(i,j), btmp);
                    int r = rtmp * scaleForSave >> 21;
                    int g = gtmp * scaleForSave >> 21;
                    int b = btmp * scaleForSave >> 21;
                    tmpdata[ix++] = (r*19595+g*38469+b*7472)>>16;
                }
       }
        else if (thumbImg->getType() == sImagefloat) {
            Imagefloat *image = static_cast<Imagefloat*>(thumbImg);
            float max_=0.f;

            for (int row=0; row<image->height; row++)
                for (int col=0; col<image->width; col++) {
                    if (image->r(row,col)>max_) max_ = image->r(row,col);
                    if (image->g(row,col)>max_) max_ = image->g(row,col);
                    if (image->b(row,col)>max_) max_ = image->b(row,col);
                }
            image->convertTo(max_, max);

            if (max < 16384) max = 16384;
            scaleForSave = 65535*8192 / max;

            // Correction and gamma to 8 Bit
            for (int i=0; i<image->height; i++)
                for (int j=(image->width-trim_width)/2; j<trim_width+(image->width-trim_width)/2; j++) {
                    unsigned short rtmp, gtmp, btmp;
                    image->convertTo(image->r(i,j), rtmp);
                    image->convertTo(image->g(i,j), gtmp);
                    image->convertTo(image->b(i,j), btmp);
                    int r = rtmp * scaleForSave >> 21;
                    int g = gtmp * scaleForSave >> 21;
                    int b = btmp * scaleForSave >> 21;
                    tmpdata[ix++] = (r*19595+g*38469+b*7472)>>16;
                }
        }
        else {
            printf("getGrayscaleHistEQ #2: Unsupported image type \"%s\"!\n", thumbImg->getType());
        }
    }

    // histogram equalization
    unsigned int hist[256] = {0};

    for (int i=0; i<ix; i++) {
        hist[tmpdata[i]]++;
    }

    int cdf = 0, cdf_min=-1;
    for (int i=0; i<256; i++) {
        cdf+=hist[i];
        if (cdf>0 && cdf_min==-1) {
            cdf_min=cdf;
        }
        if (cdf_min!=-1) {
            hist[i] = (cdf-cdf_min)*255/((thumbImg->height*trim_width)-cdf_min);
        }
    }

    for (int i=0; i<ix; i++) {
        tmpdata[i] = hist[tmpdata[i]];
    }
    
    return tmpdata;
}

bool Thumbnail::writeImage (const Glib::ustring& fname, int format) {

    if (!thumbImg)
        return false;

    Glib::ustring fullFName = fname+".rtti";

    FILE* f = safe_g_fopen (fullFName, "wb");
    if (!f)
        return false;
    fwrite (thumbImg->getType(), sizeof (char), strlen(thumbImg->getType()), f);
    fputc ('\n', f);
    guint32 w = guint32(thumbImg->width);
    guint32 h = guint32(thumbImg->height);
    fwrite (&w, sizeof (guint32), 1, f);
    fwrite (&h, sizeof (guint32), 1, f);

    if (thumbImg->getType() == sImage8) {
        Image8 *image = static_cast<Image8*>(thumbImg);
        image->writeData(f);
    }
    else if (thumbImg->getType() == sImage16) {
        Image16 *image = static_cast<Image16*>(thumbImg);
        image->writeData(f);
    }
    else if (thumbImg->getType() == sImagefloat) {
        Imagefloat *image = static_cast<Imagefloat*>(thumbImg);
        image->writeData(f);
    }

    //thumbImg->writeData(f);
    fclose (f);
    return true;
}

bool Thumbnail::readImage (const Glib::ustring& fname) {
    
    if (thumbImg) {
        delete thumbImg;
        thumbImg = NULL;
    }

    Glib::ustring fullFName = fname+".rtti";

    if (!safe_file_test (fullFName, Glib::FILE_TEST_EXISTS))
        return false;

    FILE* f = safe_g_fopen (fullFName, "rb");
    if (!f)
        return false;

    char imgType[31];  // 30 -> arbitrary size, but should be enough for all image type's name
    fgets(imgType, 30, f);
    imgType[strlen(imgType)-1] = '\0';  // imgType has a \n trailing character, so we overwrite it by the \0 char

    guint32 width, height;
    fread (&width, 1, sizeof (guint32), f);
    fread (&height, 1, sizeof (guint32), f);

    bool success = false;
    if (!strcmp(imgType, sImage8)) {
        Image8 *image = new Image8(width, height);
        image->readData(f);
        thumbImg = image;
        success = true;
    }
    else if (!strcmp(imgType, sImage16)) {
        Image16 *image = new Image16(width, height);
        image->readData(f);
        thumbImg = image;
        success = true;
    }
    else if (!strcmp(imgType, sImagefloat)) {
        Imagefloat *image = new Imagefloat(width, height);
        image->readData(f);
        thumbImg = image;
        success = true;
    }
    else {
        printf("readImage: Unsupported image type \"%s\"!\n", imgType);
    }
    fclose(f);
    return success;
}

bool Thumbnail::readData  (const Glib::ustring& fname) {

    SafeKeyFile keyFile;
    
    try {
        MyMutex::MyLock thmbLock(thumbMutex);
        if (!keyFile.load_from_file (fname)) 
            return false;

        if (keyFile.has_group ("LiveThumbData")) { 
            if (keyFile.has_key ("LiveThumbData", "CamWBRed"))          camwbRed            = keyFile.get_double ("LiveThumbData", "CamWBRed");
            if (keyFile.has_key ("LiveThumbData", "CamWBGreen"))        camwbGreen          = keyFile.get_double ("LiveThumbData", "CamWBGreen");
            if (keyFile.has_key ("LiveThumbData", "CamWBBlue"))         camwbBlue           = keyFile.get_double ("LiveThumbData", "CamWBBlue");
            if (keyFile.has_key ("LiveThumbData", "RedAWBMul"))         redAWBMul           = keyFile.get_double ("LiveThumbData", "RedAWBMul");
            if (keyFile.has_key ("LiveThumbData", "GreenAWBMul"))       greenAWBMul         = keyFile.get_double ("LiveThumbData", "GreenAWBMul");
            if (keyFile.has_key ("LiveThumbData", "BlueAWBMul"))        blueAWBMul          = keyFile.get_double ("LiveThumbData", "BlueAWBMul");
            if (keyFile.has_key ("LiveThumbData", "AEHistCompression")) aeHistCompression   = keyFile.get_integer ("LiveThumbData", "AEHistCompression");
            if (keyFile.has_key ("LiveThumbData", "RedMultiplier"))     redMultiplier       = keyFile.get_double ("LiveThumbData", "RedMultiplier");
            if (keyFile.has_key ("LiveThumbData", "GreenMultiplier"))   greenMultiplier     = keyFile.get_double ("LiveThumbData", "GreenMultiplier");
            if (keyFile.has_key ("LiveThumbData", "BlueMultiplier"))    blueMultiplier      = keyFile.get_double ("LiveThumbData", "BlueMultiplier");
            if (keyFile.has_key ("LiveThumbData", "Scale"))             scale               = keyFile.get_double ("LiveThumbData", "Scale");
            if (keyFile.has_key ("LiveThumbData", "DefaultGain"))       defGain             = keyFile.get_double ("LiveThumbData", "DefaultGain");
            if (keyFile.has_key ("LiveThumbData", "ScaleForSave"))      scaleForSave        = keyFile.get_integer ("LiveThumbData", "ScaleForSave");
            if (keyFile.has_key ("LiveThumbData", "GammaCorrected"))    gammaCorrected      = keyFile.get_boolean ("LiveThumbData", "GammaCorrected");
            if (keyFile.has_key ("LiveThumbData", "ColorMatrix")) {
                std::vector<double> cm = keyFile.get_double_list ("LiveThumbData", "ColorMatrix");
                int ix = 0;
                for (int i=0; i<3; i++)
                    for (int j=0; j<3; j++)
                        colorMatrix[i][j] = cm[ix++];
            }
        }
        return true;
    }
    catch (Glib::Error &err) {
        if (options.rtSettings.verbose)
            printf("Thumbnail::readData / Error code %d while reading values from \"%s\":\n%s\n", err.code(), fname.c_str(), err.what().c_str());
    }
    catch (...) {
        if (options.rtSettings.verbose)
            printf("Thumbnail::readData / Unknown exception while trying to load \"%s\"!\n", fname.c_str());
    }

    return false;
}

bool Thumbnail::writeData  (const Glib::ustring& fname) {

    SafeKeyFile keyFile;

    MyMutex::MyLock thmbLock(thumbMutex);

    try {
        if( safe_file_test(fname,Glib::FILE_TEST_EXISTS) )
            keyFile.load_from_file (fname);
    }
    catch (Glib::Error &err) {
        if (options.rtSettings.verbose)
            printf("Thumbnail::writeData / Error code %d while reading values from \"%s\":\n%s\n", err.code(), fname.c_str(), err.what().c_str());
    }
    catch (...) {
        if (options.rtSettings.verbose)
            printf("Thumbnail::writeData / Unknown exception while trying to save \"%s\"!\n", fname.c_str());
    }

    keyFile.set_double  ("LiveThumbData", "CamWBRed", camwbRed);
    keyFile.set_double  ("LiveThumbData", "CamWBGreen", camwbGreen);
    keyFile.set_double  ("LiveThumbData", "CamWBBlue", camwbBlue);
    keyFile.set_double  ("LiveThumbData", "RedAWBMul", redAWBMul);
    keyFile.set_double  ("LiveThumbData", "GreenAWBMul", greenAWBMul);
    keyFile.set_double  ("LiveThumbData", "BlueAWBMul", blueAWBMul);
    keyFile.set_integer ("LiveThumbData", "AEHistCompression", aeHistCompression);
    keyFile.set_double  ("LiveThumbData", "RedMultiplier", redMultiplier);
    keyFile.set_double  ("LiveThumbData", "GreenMultiplier", greenMultiplier);
    keyFile.set_double  ("LiveThumbData", "BlueMultiplier", blueMultiplier);
    keyFile.set_double  ("LiveThumbData", "Scale", scale);
    keyFile.set_double  ("LiveThumbData", "DefaultGain", defGain);
    keyFile.set_integer ("LiveThumbData", "ScaleForSave", scaleForSave);
    keyFile.set_boolean ("LiveThumbData", "GammaCorrected", gammaCorrected);
    Glib::ArrayHandle<double> cm ((double*)colorMatrix, 9, Glib::OWNERSHIP_NONE);
    keyFile.set_double_list ("LiveThumbData", "ColorMatrix", cm);

    FILE *f = safe_g_fopen (fname, "wt");
    if (!f) {
        if (options.rtSettings.verbose)
            printf("Thumbnail::writeData / Error: unable to open file \"\" with write access!\n", fname.c_str());
        return false;
    }
    else {
        fprintf (f, "%s", keyFile.to_data().c_str());
        fclose (f);
    }
    return true;
}

bool Thumbnail::readEmbProfile  (const Glib::ustring& fname) {

    FILE* f = safe_g_fopen (fname, "rb");
    if (!f) {
        embProfileData = NULL;
        embProfile = NULL;
        embProfileLength = 0;
    }
    else {
        fseek (f, 0, SEEK_END);
        embProfileLength = ftell (f);
        fseek (f, 0, SEEK_SET);
        embProfileData = new unsigned char[embProfileLength];
        fread (embProfileData, 1, embProfileLength, f);
        fclose (f);
        embProfile = cmsOpenProfileFromMem (embProfileData, embProfileLength);
        return true;
    }
    return false;
}

bool Thumbnail::writeEmbProfile (const Glib::ustring& fname) {
    
    if (embProfileData) {
        FILE* f = safe_g_fopen(fname, "wb");
        if (f) {
            fwrite (embProfileData, 1, embProfileLength, f);
            fclose (f);
            return true;
        }
    }
    return false;
}

bool Thumbnail::readAEHistogram  (const Glib::ustring& fname) {

    FILE* f = safe_g_fopen (fname, "rb");
    if (!f) 
        aeHistogram(0);
    else {
        aeHistogram(65536>>aeHistCompression);
        fread (&aeHistogram[0], 1, (65536>>aeHistCompression)*sizeof(aeHistogram[0]), f);
        fclose (f);
        return true;
    }
    return false;
}

bool Thumbnail::writeAEHistogram (const Glib::ustring& fname) {

    if (aeHistogram) {
        FILE* f = safe_g_fopen (fname, "wb");
        if (f) {
            fwrite (&aeHistogram[0], 1, (65536>>aeHistCompression)*sizeof(aeHistogram[0]), f);
            fclose (f);
            return true;
        }
    }
    return false;
}

}