/*=========================================================================

  Program:   Visualization Toolkit
  Module:    $RCSfile: vtkImageProgressIterator.txx,v $

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
// Include blockers needed since vtkImageProgressIterator.h includes
// this file when VTK_NO_EXPLICIT_TEMPLATE_INSTANTIATION is defined.
#ifndef __vtkImageProgressIterator_txx
#define __vtkImageProgressIterator_txx

#include "vtkImageProgressIterator.h"
#include "vtkImageData.h"
#include "vtkAlgorithm.h"

template <class DType>
vtkImageProgressIterator<DType>::vtkImageProgressIterator(vtkImageData *imgd, 
                                                       int *ext, 
                                                       vtkAlgorithm *po, 
                                                       int id) : 
  vtkImageIterator<DType>(imgd,ext)
{
  this->Target = 
    static_cast<unsigned long>((ext[5] - ext[4]+1)*(ext[3] - ext[2]+1)/50.0);
  this->Target++;
  this->Count = 0;
  this->Count2 = 0;
  this->Algorithm = po;
  this->ID = id;
}

template <class DType>
void vtkImageProgressIterator<DType>::NextSpan()
{
  this->Pointer += this->Increments[1];
  this->SpanEndPointer += this->Increments[1];
  if (this->Pointer >= this->SliceEndPointer)
    {
    this->Pointer += this->ContinuousIncrements[2];
    this->SpanEndPointer += this->ContinuousIncrements[2];
    this->SliceEndPointer += this->Increments[2];
    }
  if (!this->ID)
    {
    if (this->Count2 == this->Target)
      {
      this->Count += this->Count2;
      this->Algorithm->UpdateProgress(this->Count/(50.0*this->Target));
      this->Count2 = 0;
      }
    this->Count2++;
    }
}

template <class DType>
int vtkImageProgressIterator<DType>::IsAtEnd()
{
  if(this->Algorithm->GetAbortExecute())
    {
    return 1;
    }
  else
    {
    return this->Superclass::IsAtEnd();
    }
}

#endif
