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

  Program:   Visualization Toolkit
  Module:    vtkGeoFileImageSource.h

  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.

=========================================================================*/
/*-------------------------------------------------------------------------
  Copyright 2008 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/
// .NAME vtkGeoFileImageSource - A tiled image source on disk.
//
// .SECTION Description
// vtkGeoFileImageSource is a vtkGeoSource that fetches .vti images from
// disk in a directory with a certain naming scheme. You may use
// vtkGeoAlignedImageRepresentation's SaveDatabase method to generate
// an database of image tiles in this format.

#ifndef vtkGeoFileImageSource_h
#define vtkGeoFileImageSource_h

#include "vtkGeovisCoreModule.h" // For export macro
#include "vtkGeoSource.h"
#include "vtkSmartPointer.h" // For smart pointer ivars

class vtkGeoImageNode;
class vtkGeoTreeNode;

class VTKGEOVISCORE_EXPORT vtkGeoFileImageSource : public vtkGeoSource
{
public:
  static vtkGeoFileImageSource *New();
  vtkTypeMacro(vtkGeoFileImageSource,vtkGeoSource);
  void PrintSelf(ostream& os, vtkIndent indent);

  vtkGeoFileImageSource();
  ~vtkGeoFileImageSource();

  // Description:
  // Fetches the root image representing the whole globe.
  virtual bool FetchRoot(vtkGeoTreeNode* root);

  // Description:
  // Fetches the child image of a parent from disk.
  virtual bool FetchChild(vtkGeoTreeNode* node, int index, vtkGeoTreeNode* child);

  // Description:
  // The path the tiled image database.
  vtkSetStringMacro(Path);
  vtkGetStringMacro(Path);

protected:

  bool ReadImage(int level, int id, vtkGeoImageNode* node);

private:
  vtkGeoFileImageSource(const vtkGeoFileImageSource&); // Not implemented
  void operator=(const vtkGeoFileImageSource&) VTK_DELETE_FUNCTION;

  char* Path;
};

#endif
