/* ============================================================
 *
 * This file is part of the KDE project
 *
 * Date        : 2009-11-13
 * Description : Sane interface for KDE
 *
 * Copyright (C) 2009 by Kare Sars <kare dot sars at iki dot fi>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) version 3, or any
 * later version accepted by the membership of KDE e.V. (or its
 * successor approved by the membership of KDE e.V.), which shall
 * act as a proxy defined in Section 6 of version 3 of the license.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * ============================================================ */

#ifndef KSANE_PREVIEW_THREAD_H
#define KSANE_PREVIEW_THREAD_H

#include "ksanepreviewimagebuilder.h"

// Sane includes
extern "C"
{
#include <sane/saneopts.h>
#include <sane/sane.h>
}

#include <QThread>
#include <QMutex>
#include <QImage>

#define PREVIEW_READ_CHUNK_SIZE 100000

namespace KSaneIface
{
class KSanePreviewThread: public QThread
{
    Q_OBJECT
public:
    typedef enum {
        READ_ON_GOING,
        READ_ERROR,
        READ_CANCEL,
        READ_READY
    } ReadStatus;

    KSanePreviewThread(SANE_Handle handle, QImage *img);
    void run() override;
    void setPreviewInverted(bool);
    void cancelScan();
    int scanProgress();
    bool saneStartDone();
    bool imageResized();

    SANE_Status saneStatus();

    QMutex imgMutex;

private:
    void readData();
    void copyToPreviewImg(int readBytes);

    SANE_Byte       m_readData[PREVIEW_READ_CHUNK_SIZE];
    SANE_Handle     m_saneHandle;
    int             m_frameSize;
    int             m_frameRead;
    int             m_frame_t_count;
    int             m_dataSize;
    SANE_Parameters m_params;
    SANE_Status     m_saneStatus;
    ReadStatus      m_readStatus;
//            int             m_scanProgress;
    bool            m_saneStartDone;
    bool            m_invertColors;
    KSanePreviewImageBuilder m_imageBuilder;
};
}

#endif
