dox/IO/vtkZLibDataCompressor.h

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

  Program:   Visualization Toolkit
  Module:    vtkZLibDataCompressor.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.

=========================================================================*/
#ifndef __vtkZLibDataCompressor_h
#define __vtkZLibDataCompressor_h

#include "vtkDataCompressor.h"

class VTK_IO_EXPORT vtkZLibDataCompressor : public vtkDataCompressor
{
public:
  vtkTypeMacro(vtkZLibDataCompressor,vtkDataCompressor);
  void PrintSelf(ostream& os, vtkIndent indent);
  static vtkZLibDataCompressor* New();  
  
  unsigned long GetMaximumCompressionSpace(unsigned long size);


  vtkSetClampMacro(CompressionLevel, int, 0, 9);
  vtkGetMacro(CompressionLevel, int);
  
protected:
  vtkZLibDataCompressor();
  ~vtkZLibDataCompressor();
  
  int CompressionLevel;

  // Compression method required by vtkDataCompressor.
  unsigned long CompressBuffer(const unsigned char* uncompressedData,
                               unsigned long uncompressedSize,
                               unsigned char* compressedData,
                               unsigned long compressionSpace);
  // Decompression method required by vtkDataCompressor.
  unsigned long UncompressBuffer(const unsigned char* compressedData,
                                 unsigned long compressedSize,
                                 unsigned char* uncompressedData,
                                 unsigned long uncompressedSize);
private:
  vtkZLibDataCompressor(const vtkZLibDataCompressor&);  // Not implemented.
  void operator=(const vtkZLibDataCompressor&);  // Not implemented.
};

#endif

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