/**
 * This file is a part of Luminance HDR package.
 * ----------------------------------------------------------------------
 * Copyright (C) 2011 Davide Anastasia
 *
 *  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
 * ----------------------------------------------------------------------
 *
 * This class provides I/O of HDR images
 * This class is inspired by LoadHdrThread and borrow most of its code
 * but it is not derived from QThread
 *
 * Original Work
 * @author Davide Anastasia <davideanastasia@users.sourceforge.net>
 *
 */

#ifndef IOWORKER_H
#define IOWORKER_H

#ifdef __APPLE__
#include <libraw.h>
#else
#include <libraw/libraw.h>
#endif

#include <QObject>
#include <QString>

#include <Libpfs/params.h>
#include <Libpfs/colorspace/rgbremapper_fwd.h>

namespace pfs {
class Frame;
}

class GenericViewer;
class TonemappingOptions;
class LuminanceOptions;

int progress_cb(void *data, enum LibRaw_progress p, int iteration, int expected);

pfs::Params getRawSettings();
pfs::Params getRawSettings(const LuminanceOptions& opts);

class IOWorker : public QObject
{
    Q_OBJECT

private:
    friend
    int progress_cb(void *data, enum LibRaw_progress p, int iteration, int expected);

    void get_frame(QString fname);
    void emitNextStep(int iteration);
    void emitMaximumValue(int iteration);

public:
    IOWorker(QObject* parent = 0);
    ~IOWorker();

public Q_SLOTS:
    pfs::Frame* read_hdr_frame(const QString& filename);

    bool write_hdr_frame(pfs::Frame *frame, const QString& filename,
                         const pfs::Params& params = pfs::Params());
    bool write_hdr_frame(GenericViewer* frame, const QString& filename,
                         const pfs::Params& params = pfs::Params());

    bool write_ldr_frame(pfs::Frame* frame,
                         const QString& filename,
                         const QString& inputFileName,
                         const QVector<float>& expoTimes,
                         TonemappingOptions* tmopts = NULL,
                         const pfs::Params& params = pfs::Params());

    bool write_ldr_frame(GenericViewer* frame,
                         const QString& filename,
                         const QString& inputFileName,
                         const QVector<float>& expoTimes,
                         TonemappingOptions* tmopts = NULL,
                         const pfs::Params& params = pfs::Params());

signals:
    void read_hdr_failed(const QString&);
    void read_hdr_success(pfs::Frame*, const QString&);

    void write_hdr_failed();
    void write_hdr_success(pfs::Frame*, const QString&);
    void write_hdr_success(GenericViewer*, const QString&);

    void write_ldr_failed();
    void write_ldr_success(pfs::Frame*, const QString&);
    void write_ldr_success(GenericViewer*, const QString&);

    void setMaximum(int);
    void setValue(int);

    void IO_init();
    void IO_finish();
};

#endif // IOWORKER_H
