/*
 * 	band.cpp		(C) 2006, Aurélien Croc (AP²C)
 *
 *  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; version 2 of the License.
 * 
 *  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.
 *
 *  $Id: band.cpp 108 2007-11-16 02:28:52Z ap2c $
 * 
 */
#include "band.h"
#include "error.h"
#include "compress.h"
#include <stdlib.h>
#include <string.h>


/*
 * Méthodes internes
 * Internal methods
 */
unsigned char *Band::_algorithm0(size_t *size)
{
    unsigned char *tmp;

    *size = _width * _height;
    tmp = new unsigned char[*size];
    memcpy(tmp, _band, _height * _width);
    return tmp;
}

unsigned char *Band::_algorithm11(size_t *size)
{
    struct BandArray band;
    unsigned char *output;

    output = new unsigned char[_width * _height + 8];
    band.array = output;
    band.next = output + 8;
    band.prev = output;
    *(uint32_t *)output = 0x09ABCDEF;

    calcOccurs(_band, _height, _width, 0x11);
    compressBand(&band, _band, _width, _height);
    *size = band.next - band.array;
    return band.array;
}

/*int Band::initCompression()
  {
  }*/



/*
 * Constructeur - Destructeur
 * Init - Uninit
 */
Band::Band(unsigned long bandWidth, unsigned long bandHeight)
{
    _line = 0;
    _width = (bandWidth + 7) >> 3;
    _height = bandHeight;
    _band = NULL;
}

Band::~Band()
{
    if (_band)
        delete[] _band;
}



/*
 * Ajout d'une ligne
 * Add a line
 */
int Band::addLine(unsigned char *line, unsigned long width)
{
    int off = _line;

    if (!_line)
        _empty = false;
    if (!_band) {
        _band = new unsigned char[_width * _height];
        memset(_band, 0xFF, _width * _height);
    }

    // Clip the text
    if (width > _width)
        _clipping = width - _width;
    line += _clipping;
    width -= _clipping;

    if (_line == _height) {
        ERROR(_("Band::addLine: the end of the band has been "
            "reached"));
        return -1;
    }

    for (unsigned int i=0; i < width; i++) {
        _band[off] = ~line[i];
        off += _height;
    }

    _line++;
    return 0;
}



/*
 * Exportation d'une bande
 * Export a band
 */

unsigned char* Band::exportBand(int algorithm, size_t *size)
{
    if (algorithm == 0)
        return _algorithm0(size);
    else if (algorithm == 0x11)
        return _algorithm11(size);
    else
        return NULL;
}

/* vim: set expandtab tabstop=4 shiftwidth=4 smarttab tw=80 cin enc=utf8: */