/********************************************************************
**                Image Component Library (ICL)                    **
**                                                                 **
** Copyright (C) 2006-2013 CITEC, University of Bielefeld          **
**                         Neuroinformatics Group                  **
** Website: www.iclcv.org and                                      **
**          http://opensource.cit-ec.de/projects/icl               **
**                                                                 **
** File   : ICLFilter/src/ICLFilter/UnaryOpPipe.cpp                **
** Module : ICLFilter                                              **
** Authors: Christof Elbrechter                                    **
**                                                                 **
**                                                                 **
** GNU LESSER GENERAL PUBLIC LICENSE                               **
** This file may be used under the terms of the GNU Lesser General **
** Public License version 3.0 as published by the                  **
**                                                                 **
** Free Software Foundation and appearing in the file LICENSE.LGPL **
** included in the packaging of this file.  Please review the      **
** following information to ensure the license requirements will   **
** be met: http://www.gnu.org/licenses/lgpl-3.0.txt                **
**                                                                 **
** The development of this software was supported by the           **
** Excellence Cluster EXC 277 Cognitive Interaction Technology.    **
** The Excellence Cluster EXC 277 is a grant of the Deutsche       **
** Forschungsgemeinschaft (DFG) in the context of the German       **
** Excellence Initiative.                                          **
**                                                                 **
********************************************************************/

#include <ICLFilter/UnaryOpPipe.h>
#include <ICLFilter/UnaryOp.h>
#include <ICLCore/ImgBase.h>
#include <ICLCore/Img.h>

using namespace icl::utils;
using namespace icl::core;

namespace icl{
  namespace filter{
    
    UnaryOpPipe::UnaryOpPipe(){}
    
    UnaryOpPipe::~UnaryOpPipe(){
      for(int i=0;i<getLength();i++){
        delete ops[i];
        delete ims[i];
      }
    }
    
    void UnaryOpPipe::add(UnaryOp *op, ImgBase*im){
      ops.push_back(op);
      ims.push_back(im);
    }
    
    void UnaryOpPipe::apply(const ImgBase *src, ImgBase **dst){
      int length = getLength();
      switch(length){
        case 0: ERROR_LOG("length must be > 0"); break;
        case 1: getOp(0)->apply(src,dst); break;
        default:
          getOp(0)->apply(src,&getImage(0));
          for(int i=1;i<length-1;i++){
            getOp(i)->apply(getImage(i-1),&getImage(i));
          }
          getOp(length-1)->apply(getImage(length-2),dst);
          break;
      }
    }
  
    const ImgBase *UnaryOpPipe::apply(const ImgBase *src){
      apply(src,&getLastImage());
      return getLastImage();
    }
    
    int UnaryOpPipe::getLength() const {
      return (int)ops.size();
    }
    ImgBase *&UnaryOpPipe::getLastImage() {
      return ims[getLength()-1];
    }
    UnaryOp *&UnaryOpPipe::getOp(int i) {
      return ops[i];
    }
    ImgBase *&UnaryOpPipe::getImage(int i) {
      return ims[i];
    }
  } // namespace filter
}