/**
 * This file is a part of LuminanceHDR package.
 * ----------------------------------------------------------------------
 * Copyright (C) 2006,2007 Giuseppe Rota
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * ----------------------------------------------------------------------
 *
 * Original Work
 * @author Giuseppe Rota <grota@users.sourceforge.net>
 * Improvements, bugfixing
 * @author Franco Comida <fcomida@users.sourceforge.net>
 *
 */

#include "arch/getopt.h"

#include <QTimer>
#include <QDebug>
#include <iostream>

#include "commandline.h"

#include "Common/LuminanceOptions.h"

#include "Exif/ExifOperations.h"

#include "Core/IOWorker.h"
#include "Core/TMWorker.h"
#include "TonemappingEngine/TonemapOperator.h"

#if defined(_MSC_VER)
	#include <fcntl.h>
	#include <io.h>
#endif

namespace
{
void printErrorAndExit(const QString& error_str)
{
	#if defined(_MSC_VER)
		_setmode(_fileno(stderr), _O_U16TEXT);
		std::wcerr << qPrintable(error_str) << std::endl;
	#else
		std::cerr << qPrintable(error_str) << std::endl;
	#endif
    exit(-1);
}

void printIfVerbose(const QString& str, bool verbose)
{
    if ( verbose )
    {
		#if defined(_MSC_VER)
			_setmode(_fileno(stdout), _O_U16TEXT);
			std::wcout << qPrintable(str) << std::endl;
		#else
    		std::cout << qPrintable(str) << std::endl;
		#endif
    }
}

float toFloatWithErrMsg(const QString &str)
{
    bool ok;
    float ret = str.toFloat(&ok);
    if (!ok)
    {
        printErrorAndExit(QObject::tr("Cannot convert %1 to a float").arg(str));
    }
    return ret;
}

int toIntWithErrMsg(const QString &str)
{
    bool ok;
    int ret = str.toInt(&ok);
    if (!ok)
    {
        printErrorAndExit(QObject::tr("Cannot convert %1 to an integer").arg(str));
    }
    return ret;
}

}

//#define NONCLIOPTIONS 31

static struct option cmdLineOptions[] = {
    // Qt options
    { "nograb", no_argument, NULL, 0 },
    { "dograb", no_argument, NULL, 0 },
    { "sync", no_argument, NULL, 0 },
    { "style", required_argument, NULL, 0 },
    { "stylesheet", required_argument, NULL, 0 },
    { "session", required_argument, NULL, 0 },
    { "widgetcount", no_argument, NULL, 0 },
    { "reverse", no_argument, NULL, 0 },
    { "graphicssystem", required_argument, NULL, 0 },
    { "qmljsdebugger", required_argument, NULL, 0 },
    { "display", required_argument, NULL, 0 },
    { "geometry", required_argument, NULL, 0 },
    { "fn", required_argument, NULL, 0 },
    { "font", required_argument, NULL, 0 },
    { "bg", required_argument, NULL, 0 },
    { "background", required_argument, NULL, 0 },
    { "fg", required_argument, NULL, 0 },
    { "foreground", required_argument, NULL, 0 },
    { "btn", required_argument, NULL, 0 },
    { "button", required_argument, NULL, 0 },
    { "name", required_argument, NULL, 0 },
    { "title", required_argument, NULL, 0 },
    { "visual", required_argument, NULL, 0 },
    { "ncols", required_argument, NULL, 0 },
    { "cmap", no_argument, NULL, 0 },
    { "im", no_argument, NULL, 0 },
    { "inputstyle", required_argument, NULL, 0 },
    // Luminance HDR options
    { "verbose", no_argument, NULL, 'v' },
    { "help", no_argument, NULL, 'h' },
    { "align", required_argument, NULL, 'a' },
    { "ev", required_argument, NULL, 'e' },
    { "config", required_argument, NULL, 'c' },
    { "load", required_argument, NULL, 'l' },
    { "gamma", required_argument, NULL, 'g' },
    { "resize", required_argument, NULL, 'r' },
    { "save", required_argument, NULL, 's' },
    { "tmo", required_argument, NULL, 't' },
    { "tmoptions", required_argument, NULL, 'p' },
    { "output", required_argument, NULL, 'o' },
    { NULL, 0, NULL, 0 }
};

CommandLineInterfaceManager::CommandLineInterfaceManager(const int argc, char **argv):
    argc(argc),
    argv(argv),
    operationMode(UNKNOWN_MODE),
    alignMode(NO_ALIGN),
    tmopts(TMOptionsOperations::getDefaultTMOptions()),
    verbose(false)
{
    hdrcreationconfig.weights = TRIANGULAR;
    hdrcreationconfig.response_curve = LINEAR;
    hdrcreationconfig.model = DEBEVEC;
    hdrcreationconfig.SaveCurveToFilename = QString();

    parseArgs();
}

void CommandLineInterfaceManager::parseArgs()
{
    int optionIndex = 0;
    int c;

//    QString cliOptions;
//    for (int i = NONCLIOPTIONS; cmdLineOptions[i].name != NULL; ++i) {
//        cliOptions += cmdLineOptions[i].val;
//    }

    while( (c = getopt_long_only (argc, argv, ":hva:e:c:l:s:g:r:t:p:o:u", cmdLineOptions, &optionIndex)) != -1 )
    {
        switch ( c )
        {
        case 'h':
        {
            printHelp(argv[0]);
            exit(0);
        }
            break;
        case 'v':
        {
            verbose = true;
        }
            break;
        case 'a':
        {
            if (strcmp(optarg,"AIS")==0)
            {
                alignMode = AIS_ALIGN;
            }
            else if (strcmp(optarg,"MTB")==0)
            {
                alignMode = MTB_ALIGN;
            }
            else
                printErrorAndExit(tr("Error: Alignment engine not recognized."));
            }
            break;
        case 'e':
        {
            QStringList evstringlist=QString(optarg).split(",");
            for (int i=0; i<evstringlist.count(); i++)
                ev.append(toFloatWithErrMsg(evstringlist.at(i)));
        }
            break;
        case 'c':
        {
            QStringList hdrCreationOptsList=QString(optarg).split(":");
            for (int i=0; i<hdrCreationOptsList.size(); i++)
            {
                QStringList keyandvalue = hdrCreationOptsList[i].split("=");

                if (keyandvalue.size()!=2)
                {
                    printErrorAndExit(tr("Error: Wrong HDR creation format."));
                }
                if (keyandvalue.at(0)== "weight") {
                    if (keyandvalue.at(1)== "triangular")
                        hdrcreationconfig.weights = TRIANGULAR;
                    else if (keyandvalue.at(1) == "gaussian")
                        hdrcreationconfig.weights=GAUSSIAN;
                    else if (keyandvalue.at(1) == "plateau")
                        hdrcreationconfig.weights=PLATEAU;
                    else
                        printErrorAndExit(tr("Error: Unknown weight function specified."));
                }

                else if (keyandvalue.at(0) == "response_curve") {
                    if (keyandvalue.at(1) == "from_file")
                        hdrcreationconfig.response_curve = FROM_FILE;
                    else if (keyandvalue.at(1) == "linear")
                        hdrcreationconfig.response_curve=LINEAR;
                    else if (keyandvalue.at(1) == "gamma")
                        hdrcreationconfig.response_curve=GAMMA;
                    else if (keyandvalue.at(1) == "log")
                        hdrcreationconfig.response_curve=LOG10;
                    else if (keyandvalue.at(1) == "robertson")
                        hdrcreationconfig.response_curve=FROM_ROBERTSON;
                    else
                        printErrorAndExit(tr("Error: Unknown response curve specified."));
                }

                else if (keyandvalue.at(0) == "model") {
                    if (keyandvalue.at(1) == "robertson")
                        hdrcreationconfig.model=ROBERTSON;
                    else if (keyandvalue.at(1) == "debevec")
                        hdrcreationconfig.model = DEBEVEC;
                    else
                        printErrorAndExit(tr("Error: Unknown HDR creation model specified."));
                }

                else if (keyandvalue.at(0) == "curve_filename")
                    hdrcreationconfig.LoadCurveFromFilename=strdup(QFile::encodeName(keyandvalue.at(1)).constData());
                else
                    printErrorAndExit(tr("Error: Unknown HDR creation format specified."));

            } //end for loop over all "key=values"
        }
            break;
        case 'l':
            loadHdrFilename = QString(optarg);
            //loadHdrFilename=QDir::currentPath () + QDir::separator () + QString(optarg);
            break;
        case 's':
            saveHdrFilename = QString(optarg);
            break;
        case 'r':
            tmopts->xsize = toIntWithErrMsg(optarg);
            break;
        case 'g':
            tmopts->pregamma = toFloatWithErrMsg(optarg);
            break;
        case 't': {
            QString tmoperator=QString(optarg);
            if (tmoperator=="ashikhmin")
                tmopts->tmoperator=ashikhmin;
            else if (tmoperator=="drago")
                tmopts->tmoperator=drago;
            else if (tmoperator=="durand")
                tmopts->tmoperator=durand;
            else if (tmoperator=="fattal")
                tmopts->tmoperator=fattal;
            else if (tmoperator=="pattanaik")
                tmopts->tmoperator=pattanaik;
            else if (tmoperator=="reinhard02")
                tmopts->tmoperator=reinhard02;
            else if (tmoperator=="reinhard05")
                tmopts->tmoperator=reinhard05;
            else if (tmoperator=="mantiuk06")
                tmopts->tmoperator=mantiuk06;
            else if (tmoperator=="mantiuk08")
                tmopts->tmoperator=mantiuk08;
            else
                printErrorAndExit(tr("Error: Unknown tone mapping operator specified."));
        }
            break;
        case 'p': {
            QStringList tmOptsList=QString(optarg).split(":");
            for(int i=0; i<tmOptsList.size(); i++) {
                QStringList keyandvalue = tmOptsList[i].split("=");

                if (keyandvalue.size()!=2)
                    printErrorAndExit(tr("Error: Wrong tone mapping option format."));

                //fattal options
                if (keyandvalue.at(0)== "alpha")
                    tmopts->operator_options.fattaloptions.alpha=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "beta")
                    tmopts->operator_options.fattaloptions.beta=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "color")
                    tmopts->operator_options.fattaloptions.color=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "noise")
                    tmopts->operator_options.fattaloptions.noiseredux=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "new")
                    tmopts->operator_options.fattaloptions.newfattal=(keyandvalue.at(1)=="true");

                //mantiuk06 options
                else if (keyandvalue.at(0)== "contrast")
                    tmopts->operator_options.mantiuk06options.contrastfactor=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "saturation")
                    tmopts->operator_options.mantiuk06options.saturationfactor=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "detail")
                    tmopts->operator_options.mantiuk06options.detailfactor=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "equalization")
                    tmopts->operator_options.mantiuk06options.contrastequalization=(keyandvalue.at(1)=="true");

                //mantiuk08 options
                else if (keyandvalue.at(0)== "colorsaturation")
                    tmopts->operator_options.mantiuk08options.colorsaturation=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "contrastenhancement")
                    tmopts->operator_options.mantiuk08options.contrastenhancement=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "luminancelevel")
                    tmopts->operator_options.mantiuk08options.luminancelevel=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "setluminance")
                    tmopts->operator_options.mantiuk08options.setluminance=(keyandvalue.at(1)=="true");

                //ashikhmin options
                else if (keyandvalue.at(0)== "localcontrast")
                    tmopts->operator_options.ashikhminoptions.lct=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "eq")
                    tmopts->operator_options.ashikhminoptions.eq2=(keyandvalue.at(1)=="2");
                else if (keyandvalue.at(0)== "simple")
                    tmopts->operator_options.ashikhminoptions.simple=(keyandvalue.at(1)=="true");

                //durand options
                else if (keyandvalue.at(0)== "sigma_s")
                    tmopts->operator_options.durandoptions.spatial=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "sigma_r")
                    tmopts->operator_options.durandoptions.range=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "base")
                    tmopts->operator_options.durandoptions.base=toFloatWithErrMsg(keyandvalue.at(1));

                //drago options
                else if (keyandvalue.at(0)== "bias")
                    tmopts->operator_options.dragooptions.bias=toFloatWithErrMsg(keyandvalue.at(1));

                //pattanaik options
                else if (keyandvalue.at(0)== "local")
                    tmopts->operator_options.pattanaikoptions.local=(keyandvalue.at(1)=="true");
                else if (keyandvalue.at(0)== "autolum")
                    tmopts->operator_options.pattanaikoptions.autolum=(keyandvalue.at(1)=="true");
                else if (keyandvalue.at(0)== "cone")
                    tmopts->operator_options.pattanaikoptions.cone=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "rod")
                    tmopts->operator_options.pattanaikoptions.rod=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "multiplier")
                    tmopts->operator_options.pattanaikoptions.multiplier=toFloatWithErrMsg(keyandvalue.at(1));

                //reinhard02 options
                else if (keyandvalue.at(0)== "scales")
                    tmopts->operator_options.reinhard02options.scales=(keyandvalue.at(1)=="true");
                else if (keyandvalue.at(0)== "key")
                    tmopts->operator_options.reinhard02options.key=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "phi")
                    tmopts->operator_options.reinhard02options.phi=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "num")
                    tmopts->operator_options.reinhard02options.range=toIntWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "low")
                    tmopts->operator_options.reinhard02options.lower=toIntWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "high")
                    tmopts->operator_options.reinhard02options.upper=toIntWithErrMsg(keyandvalue.at(1));

                //reinhard05 options
                else if (keyandvalue.at(0)== "brightness")
                    tmopts->operator_options.reinhard05options.brightness=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "chroma")
                    tmopts->operator_options.reinhard05options.chromaticAdaptation=toFloatWithErrMsg(keyandvalue.at(1));
                else if (keyandvalue.at(0)== "lightness")
                    tmopts->operator_options.reinhard05options.lightAdaptation=toFloatWithErrMsg(keyandvalue.at(1));

                else
                    printErrorAndExit(tr("Error: Unknown tone mapping option specified."));
            } //end for loop over all "key=values"
        }
            break;
        case 'o':
            saveLdrFilename=QString(optarg);
            break;
        case '?':
            printErrorAndExit(tr("Error: Unknown option %1.").arg(optopt));
        case ':':
            printErrorAndExit(tr("Error: Missing argument for %1.").arg(optopt));
        }
    }
    for (int index = optind; index < argc; index++)
    {
        inputFiles << QString(argv[index]);
        printIfVerbose( QObject::tr("Input file %1").arg(argv[index]) , verbose);
    }
}

void CommandLineInterfaceManager::execCommandLineParams()
{
    QTimer::singleShot(0, this, SLOT(execCommandLineParamsSlot()));
}

void CommandLineInterfaceManager::execCommandLineParamsSlot()
{
    if (!ev.isEmpty() && ev.count()!=inputFiles.count())
    {
        printErrorAndExit(tr("Error: The number of EV values specified is different from the number of input files."));
    }
    //now validate operation mode.
    if ( inputFiles.size()!=0 && loadHdrFilename.isEmpty() )
    {
        operationMode = CREATE_HDR_MODE;

        printIfVerbose(QObject::tr("Running in HDR-creation mode."), verbose);
    }
    else if (!loadHdrFilename.isEmpty() && inputFiles.size()==0 )
    {
        operationMode = LOAD_HDR_MODE;

        printIfVerbose(QObject::tr("Running in Load-HDR mode."), verbose);
    }
    else
    {
        printHelp(argv[0]);
        exit(-1);
    }

    if (operationMode == CREATE_HDR_MODE)
    {
        if (verbose)
        {
            LuminanceOptions luminance_options;

            printIfVerbose(QObject::tr("Temporary directory: %1").arg(luminance_options.getTempDir()), verbose);
            printIfVerbose(QObject::tr("Using %1 threads.").arg(luminance_options.getNumThreads()), verbose);
        }

        hdrCreationManager.reset( new HdrCreationManager() );
        connect(hdrCreationManager.data(), SIGNAL(finishedLoadingInputFiles(QStringList)), this, SLOT(finishedLoadingInputFiles(QStringList)));
        connect(hdrCreationManager.data(), SIGNAL(finishedAligning()), this, SLOT(createHDR()));
        connect(hdrCreationManager.data(), SIGNAL(ais_failed(QProcess::ProcessError)), this, SLOT(ais_failed(QProcess::ProcessError)));
        hdrCreationManager->setConfig(hdrcreationconfig);
        hdrCreationManager->setFileList(inputFiles);
        hdrCreationManager->loadInputFiles();
    }
    else
    {
        printIfVerbose(QObject::tr("Loading file %1").arg(loadHdrFilename), verbose);

        HDR.reset( IOWorker().read_hdr_frame(loadHdrFilename) );

        if ( HDR != NULL )
        {
            printIfVerbose(QObject::tr("Successfully loaded file %1.").arg(loadHdrFilename), verbose);
            saveHDR();
        }
        else
        {
            printErrorAndExit(tr("Load file %1 failed").arg(loadHdrFilename));
        }
    }
}

void CommandLineInterfaceManager::finishedLoadingInputFiles(QStringList filesLackingExif)
{
    if (filesLackingExif.size()!=0 && ev.isEmpty())
    {
        printErrorAndExit(tr("Error: Exif data missing in images and EV values not specifed on the commandline, bailing out."));
    }
    if (!ev.isEmpty())
    {
        for (int i=0; i < ev.size(); i++)
            hdrCreationManager->setEV(ev.at(i),i);

        printIfVerbose( tr("EV values have been assigned.") , verbose);
    }
    hdrCreationManager->checkEVvalues();
    if (alignMode == AIS_ALIGN)
    {
        hdrCreationManager->align_with_ais();
    }
    else if (alignMode == MTB_ALIGN)
    {
        hdrCreationManager->align_with_mtb();
    }
    else if (alignMode == NO_ALIGN)
    {
        createHDR();
    }
}

void CommandLineInterfaceManager::ais_failed(QProcess::ProcessError)
{
    printErrorAndExit( tr("Failed executing align_image_stack"));
}

void CommandLineInterfaceManager::createHDR()
{
    hdrCreationManager->removeTempFiles();

    printIfVerbose( tr("Creating (in memory) the HDR.") , verbose);

    HDR.reset( hdrCreationManager->createHdr(false,1) );
    saveHDR();
}

void CommandLineInterfaceManager::saveHDR()
{
    if (!saveHdrFilename.isEmpty())
    {
        printIfVerbose( tr("Saving to file %1.").arg(saveHdrFilename) , verbose);

        // write_hdr_frame by default saves to EXR, if it doesn't find a supported file type
        if ( IOWorker().write_hdr_frame(HDR.data(), saveHdrFilename) )
        {
            printIfVerbose( tr("Image %1 saved successfully").arg(saveHdrFilename) , verbose);
        }
        else
        {
            printIfVerbose( tr("Could not save %1").arg(saveHdrFilename) , verbose);
        }
    }
    else
    {
        printIfVerbose( tr("NOT Saving HDR image to file. %1").arg(saveHdrFilename) , verbose);
    }

    startTonemap();
}

void  CommandLineInterfaceManager::startTonemap()
{
    if (!saveLdrFilename.isEmpty())
    {
        printIfVerbose( tr("Tonemapping requested, saving to file %1.").arg(saveLdrFilename) , verbose);

        //now check if user wants to resize (create thread with either -2 or true original size as first argument in ctor, see options.cpp).
        //TODO
        tmopts->origxsize = HDR->getWidth();
#ifdef QT_DEBUG
        qDebug() << "XSIZE:" << tmopts->xsize;
#endif
        if (tmopts->xsize == -2) tmopts->xsize = HDR->getWidth();

        // Build TMWorker
        TMWorker tm_worker;

        // Build a new TM frame
        // The scoped pointer will free the memory automatically later on
        QScopedPointer<pfs::Frame> tm_frame( tm_worker.computeTonemap(HDR.data(), tmopts.data()) );

        // Create an ad-hoc IOWorker to save the file
        if ( IOWorker().write_ldr_frame(tm_frame.data(), saveLdrFilename, 100, tmopts.data()) )
        {
            // File save successful
            printIfVerbose( tr("Image %1 saved successfully").arg(saveLdrFilename) , verbose);
        }
        else
        {
            // File save failed
            printErrorAndExit( tr("ERROR: Cannot save to file: %1").arg(saveLdrFilename) );
        }
        emit finishedParsing();
    }
    else
    {
        printIfVerbose("Tonemapping NOT requested.", verbose);

        emit finishedParsing();
    }
}



void CommandLineInterfaceManager::printHelp(char * progname)
{
    QString help=
            tr("Usage: %1 [OPTIONS]... [INPUTFILES]...").arg(progname) + "\n" +
            "\t" + tr("Commandline interface to %1.").arg(progname) + "\n\n" +
            "\t" + tr("-h --help              Display this help.") + "\n" +
            "\t" + tr("-v --verbose           Print more messages during execution.") + "\n" +
            "\t" + tr("-a --align AIS|MTB     Align Engine to use during HDR creation (default: no alignment).") + "\n" +
            "\t" + tr("-e --ev EV1,EV2,...    Specify numerical EV values (as many as INPUTFILES).") + "\n" +
            "\t" + tr("-c --config            HDR creation config. Possible values: ") + "\n" +
            "\t\t" + tr("weight=triangular|gaussian|plateau:response_curve=from_file|linear|gamma|log|robertson:model=robertson|debevec:curve_filename=your_file_here.m") + "\n" +
            "\t\t" + tr("(Default is weight=triangular:response_curve=linear:model=debevec) ") + "\n" +
            "\t" + tr("-l --load HDR_FILE     Load an HDR instead of creating a new one. ") + "\n" +
            "\t" + tr("-s --save HDR_FILE     Save to a HDR file format. (default: don't save) ") + "\n" +
            "\t" + tr("-g --gamma VALUE       Gamma value to use during tone mapping. (default: 1) ") + "\n" +
            "\t" + tr("-r --resize VALUE      Width you want to resize your HDR to (resized before gamma and tone mapping) ") + "\n" +
            "\t" + tr("-t --tmo               Tone mapping operator. Legal values are: ") + "\n" +
            "\t\t" + tr("ashikhmin|drago|durand|fattal|pattanaik|reinhard02|reinhard05|mantiuk06|mantiuk08") + "\n" +
            "\t\t" + tr("(Default is mantiuk06)") + "\n" +
            "\t" + tr("-p --tmoptions         Tone mapping operator options. Legal values are: ") + "\n" +
            "\t\t" + tr("alpha=VALUE:beta=VALUE:color=VALUE:noise=VALUE:new=true|false (for fattal)") + "\n" +
            "\t\t" + tr("contrast=VALUE:saturation=VALUE:detail=VALUE:equalization=true|false (for mantiuk06)") + "\n" +
            "\t\t" + tr("colorsaturation=VALUE:contrastenhancement=VALUE:luminancelevel=VALUE:setluminance=true|false (for mantiuk08)") + "\n" +
            "\t\t" + tr("localcontrast=VALUE:eq=2|4:simple=true|false (for ashikhmin)") + "\n" +
            "\t\t" + tr("sigma_s=VALUE:sigma_r=VALUE:base=VALUE (for durand)") + "\n" +
            "\t\t" + tr("bias=VALUE (for drago)") + "\n" +
            "\t\t" + tr("local=true|false:autolum=true|false:cone=VALUE:rod=VALUE:multiplier=VALUE (for pattanaik)") + "\n" +
            "\t\t" + tr("scales=true|false:key=VALUE:phi=VALUE:num=VALUE:low=VALUE:high=VALUE (for reinhard02)") + "\n" +
            "\t\t" + tr("brightness=VALUE:chroma=VALUE:lightness=VALUE (for reinhard05)") + "\n" +
            "\t\t" + tr("(default is contrast=0.3:equalization=false:saturation=1.8, see also -o)") + "\n" +
            "\t" + tr("-o --output LDR_FILE   File name you want to save your tone mapped LDR to.") + "\n" +
            "\t" + tr("                       (No tonemapping is performed unless -o is specified).") + "\n\n" +
            tr("You must either load an existing HDR file (via the -l option) or specify INPUTFILES to create a new HDR.\n");
    printErrorAndExit(help);
}
