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

  Program:   Visualization Toolkit
  Module:    vtkStructuredGridWriter.cxx

  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 "vtkStructuredGridWriter.h"

#include "vtkInformation.h"
#include "vtkObjectFactory.h"
#include "vtkStructuredGrid.h"
#include "vtkUnsignedCharArray.h"

#if !defined(_WIN32) || defined(__CYGWIN__)
# include <unistd.h> /* unlink */
#else
# include <io.h> /* unlink */
#endif

vtkStandardNewMacro(vtkStructuredGridWriter);

void vtkStructuredGridWriter::WriteData()
{
  ostream *fp;
  vtkStructuredGrid *input= vtkStructuredGrid::SafeDownCast(this->GetInput());
  int dim[3];

  vtkDebugMacro(<<"Writing vtk structured grid...");

  if ( !(fp=this->OpenVTKFile()) || !this->WriteHeader(fp) )
    {
    if (fp)
      {
      vtkErrorMacro("Ran out of disk space; deleting file: "
                    << this->FileName);
      this->CloseVTKFile(fp);
      unlink(this->FileName);
      }
    return;
    }

  // Write structured grid specific stuff
  //
  *fp << "DATASET STRUCTURED_GRID\n";

  // Write data owned by the dataset
  if (!this->WriteDataSetData(fp, input))
    {
    vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
    this->CloseVTKFile(fp);
    unlink(this->FileName);
    return;
    }

  input->GetDimensions(dim);
  *fp << "DIMENSIONS " << dim[0] << " " << dim[1] << " " << dim[2] << "\n";

  if (!this->WritePoints(fp, input->GetPoints()))
    {
    vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
    this->CloseVTKFile(fp);
    unlink(this->FileName);
    return;
    }
  
  // If blanking, write that information out
  if ( input->GetPointBlanking() )
    {
    if (!this->WriteBlanking(fp, input))
      {
      vtkErrorMacro("Ran out of disk space; deleting file: "
                    << this->FileName);
      this->CloseVTKFile(fp);
      unlink(this->FileName);
      return;
      }
    }

  if (!this->WriteCellData(fp, input))
    {
    vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
    this->CloseVTKFile(fp);
    unlink(this->FileName);
    return;
    }
  if (!this->WritePointData(fp, input))
    {
    vtkErrorMacro("Ran out of disk space; deleting file: " << this->FileName);
    this->CloseVTKFile(fp);
    unlink(this->FileName);
    return;
    }

  this->CloseVTKFile(fp);
}

int vtkStructuredGridWriter::WriteBlanking(ostream *fp, vtkStructuredGrid *grid)
{
  vtkUnsignedCharArray *blanking=grid->GetPointVisibilityArray();
  
  int numPts = grid->GetNumberOfPoints();
  *fp << "BLANKING " << numPts;
  return this->WriteArray(fp, VTK_UNSIGNED_CHAR, blanking, " %s\n", numPts, 1);
}

int vtkStructuredGridWriter::FillInputPortInformation(int,
                                                      vtkInformation *info)
{
  info->Set(vtkAlgorithm::INPUT_REQUIRED_DATA_TYPE(), "vtkStructuredGrid");
  return 1;
}

vtkStructuredGrid* vtkStructuredGridWriter::GetInput()
{
  return vtkStructuredGrid::SafeDownCast(this->Superclass::GetInput());
}

vtkStructuredGrid* vtkStructuredGridWriter::GetInput(int port)
{
  return vtkStructuredGrid::SafeDownCast(this->Superclass::GetInput(port));
}

void vtkStructuredGridWriter::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os,indent);
}
