vtkXMLWriterBase.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkXMLWriterBase_h
#define vtkXMLWriterBase_h
 
#include "vtkAlgorithm.h"
#include "vtkIOXMLModule.h" // For export macro
 
#include <string> // for std::string
 
VTK_ABI_NAMESPACE_BEGIN
class vtkDataCompressor;
 
class VTKIOXML_EXPORT vtkXMLWriterBase : public vtkAlgorithm
{
public:
  vtkTypeMacro(vtkXMLWriterBase, vtkAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;

  enum
  {
    BigEndian,
    LittleEndian
  };

  enum
  {
    Ascii,
    Binary,
    Appended
  };

  enum
  {
    Int32 = 32,
    Int64 = 64
  };

  enum
  {
    UInt32 = 32,
    UInt64 = 64
  };


  vtkSetMacro(ByteOrder, int);
  vtkGetMacro(ByteOrder, int);
  void SetByteOrderToBigEndian() { this->SetByteOrder(BigEndian); }
  void SetByteOrderToLittleEndian() { this->SetByteOrder(LittleEndian); }


  virtual void SetHeaderType(int);
  vtkGetMacro(HeaderType, int);
  void SetHeaderTypeToUInt32() { this->SetHeaderType(UInt32); }
  void SetHeaderTypeToUInt64() { this->SetHeaderType(UInt64); }


  virtual void SetIdType(int);
  vtkGetMacro(IdType, int);
  void SetIdTypeToInt32() { this->SetIdType(Int32); }
  void SetIdTypeToInt64() { this->SetIdType(Int64); }


  vtkSetFilePathMacro(FileName);
  vtkGetFilePathMacro(FileName);


  vtkSetMacro(WriteToOutputString, bool);
  vtkGetMacro(WriteToOutputString, bool);
  vtkBooleanMacro(WriteToOutputString, bool);
  std::string GetOutputString() { return this->OutputString; }


  virtual void SetCompressor(vtkDataCompressor*);
  vtkGetObjectMacro(Compressor, vtkDataCompressor);
 
  enum CompressorType
  {
    NONE,
    ZLIB,
    LZ4,
    LZMA
  };


  void SetCompressorType(int compressorType);
  void SetCompressorTypeToNone() { this->SetCompressorType(NONE); }
  void SetCompressorTypeToLZ4() { this->SetCompressorType(LZ4); }
  void SetCompressorTypeToZLib() { this->SetCompressorType(ZLIB); }
  void SetCompressorTypeToLZMA() { this->SetCompressorType(LZMA); }


  void SetCompressionLevel(int compressorLevel);
  vtkGetMacro(CompressionLevel, int);


  virtual void SetBlockSize(size_t blockSize);
  vtkGetMacro(BlockSize, size_t);


  vtkSetMacro(DataMode, int);
  vtkGetMacro(DataMode, int);
  void SetDataModeToAscii() { this->SetDataMode(Ascii); }
  void SetDataModeToBinary() { this->SetDataMode(Binary); }
  void SetDataModeToAppended() { this->SetDataMode(Appended); }


  vtkSetMacro(EncodeAppendedData, bool);
  vtkGetMacro(EncodeAppendedData, bool);
  vtkBooleanMacro(EncodeAppendedData, bool);


  vtkGetMacro(WriteTimeValue, bool);
  vtkSetMacro(WriteTimeValue, bool);
  vtkBooleanMacro(WriteTimeValue, bool);

  virtual const char* GetDefaultFileExtension() = 0;

  VTK_UNBLOCKTHREADS
  int Write();
 
protected:
  vtkXMLWriterBase();
  ~vtkXMLWriterBase() override;
 
  // Methods to define the file's major and minor version numbers.
  virtual int GetDataSetMajorVersion();
  virtual int GetDataSetMinorVersion();
 
  // The name of the output file.
  char* FileName;
 
  // Whether this object is writing to a string or a file.
  // Default is 0: write to file.
  bool WriteToOutputString;
 
  // The output string.
  std::string OutputString;
 
  // The output byte order.
  int ByteOrder;
 
  // The output binary header word type.
  int HeaderType;
 
  // The output vtkIdType.
  int IdType;
 
  // The form of binary data to write.  Used by subclasses to choose
  // how to write data.
  int DataMode;
 
  // Whether to base64-encode the appended data section.
  bool EncodeAppendedData;
 
  // Compression information.
  vtkDataCompressor* Compressor;
  size_t BlockSize;
 
  // Compression Level for vtkDataCompressor objects
  // 1 (worst compression, fastest) ... 9 (best compression, slowest)
  int CompressionLevel;
 
  // This variable is used to ease transition to new versions of VTK XML files.
  // If data that needs to be written satisfies certain conditions,
  // the writer can use the previous file version version.
  // For version change 0.1 -> 2.0 (UInt32 header) and 1.0 -> 2.0
  // (UInt64 header), if data does not have a vtkGhostType array,
  // the file is written with version: 0.1/1.0.
  bool UsePreviousVersion;
 
private:
  vtkXMLWriterBase(const vtkXMLWriterBase&) = delete;
  void operator=(const vtkXMLWriterBase&) = delete;
 
  bool WriteTimeValue = true;
};
 
VTK_ABI_NAMESPACE_END
#endif