vtkBTSReader.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-FileCopyrightText: Copyright (c) 2019-2023 Engys Ltd.
// SPDX-License-Identifier: BSD-3-Clause
#ifndef vtkBTSReader_h
#define vtkBTSReader_h

#include "vtkIOEngysModule.h" // For export macro
#include "vtkPartitionedDataSetAlgorithm.h"
#include "vtkSmartPointer.h" // For vtkSmartPointer

VTK_ABI_NAMESPACE_BEGIN
class vtkPolyData;
class SolidNames;
class vtkResourceStream;

class VTKIOENGYS_EXPORT vtkBTSReader : public vtkPartitionedDataSetAlgorithm
{
public:
  static vtkBTSReader* New();
  vtkTypeMacro(vtkBTSReader, vtkPartitionedDataSetAlgorithm);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetFilePathMacro(FileName);
  vtkGetFilePathMacro(FileName);


  virtual void SetStream(vtkResourceStream* stream);
  virtual vtkResourceStream* GetStream();


  const char* GetRegistrationName();

protected:
  vtkBTSReader();
  ~vtkBTSReader() override;

  int RequestData(vtkInformation*, vtkInformationVector**, vtkInformationVector*) override;

private:

  bool Read(vtkPartitionedDataSet* output);


  bool ReadHeader();
  bool ReadSolidNames(int numberOfSolids, SolidNames& solidNames);
  bool ReadSolid(vtkPolyData* polyData);
  bool ReadPoints(vtkPolyData* polyData);
  bool ReadFaces(vtkPolyData* polyData);


  long Filesize();


  void InitReadProgress(unsigned long fileSize);
  void UpdateReadProgress(size_t bytes);


  uint32_t ReadUint32Value();
  bool ReadArray(void* ptr, size_t variableSize, size_t nVariables);

  char* FileName = nullptr;
  vtkSmartPointer<vtkResourceStream> Stream;

  size_t ReadBytes = 0;
  size_t FileSize = 1;
  int PreviousPercentProgress = 0;
  std::string RegistrationName;

  vtkBTSReader(const vtkBTSReader&) = delete;   // Not implemented.
  void operator=(const vtkBTSReader&) = delete; // Not implemented.
};

VTK_ABI_NAMESPACE_END
#endif