/**
 * Orthanc - A Lightweight, RESTful DICOM Store
 * Copyright (C) 2012-2014 Medical Physics Department, CHU of Liege,
 * Belgium
 *
 * 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 3 of the
 * License, or (at your option) any later version.
 *
 * In addition, as a special exception, the copyright holders of this
 * program give permission to link the code of its release with the
 * OpenSSL project's "OpenSSL" library (or with modified versions of it
 * that use the same license as the "OpenSSL" library), and distribute
 * the linked executables. You must obey the GNU General Public License
 * in all respects for all of the code used other than "OpenSSL". If you
 * modify file(s) with this exception, you may extend this exception to
 * your version of the file(s), but you are not obligated to do so. If
 * you do not wish to do so, delete this exception statement from your
 * version. If you delete this exception statement from all source files
 * in the program, then also delete it here.
 * 
 * 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, see <http://www.gnu.org/licenses/>.
 **/


#include "../PrecompiledHeaders.h"
#include "ImageProcessing.h"

#include "../OrthancException.h"

#include <cassert>
#include <string.h>

namespace Orthanc
{
  void ImageProcessing::Copy(ImageAccessor& target,
                             const ImageAccessor& source)
  {
    if (target.GetWidth() != source.GetWidth() ||
        target.GetHeight() != source.GetHeight())
    {
      throw OrthancException(ErrorCode_IncompatibleImageSize);
    }

    if (target.GetFormat() != source.GetFormat())
    {
      throw OrthancException(ErrorCode_IncompatibleImageFormat);
    }

    unsigned int lineSize = GetBytesPerPixel(source.GetFormat()) * source.GetWidth();

    assert(source.GetPitch() >= lineSize && target.GetPitch() >= lineSize);

    for (unsigned int y = 0; y < source.GetHeight(); y++)
    {
      memcpy(target.GetRow(y), source.GetConstRow(y), lineSize);
    }
  }


  void ImageProcessing::Convert(ImageAccessor& target,
                                const ImageAccessor& source)
  {
    if (target.GetWidth() != source.GetWidth() ||
        target.GetHeight() != source.GetHeight())
    {
      throw OrthancException(ErrorCode_IncompatibleImageSize);
    }

    if (source.GetFormat() == target.GetFormat())
    {
      Copy(target, source);
      return;
    }

    throw OrthancException(ErrorCode_NotImplemented);
  }


  void ImageProcessing::ShiftRight(ImageAccessor& image,
                                   unsigned int shift)
  {
    if (image.GetWidth() == 0 ||
        image.GetHeight() == 0 ||
        shift == 0)
    {
      // Nothing to do
      return;
    }

    throw OrthancException(ErrorCode_NotImplemented);
  }

}