vtkPNGReader.h

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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
 
#ifndef vtkPNGReader_h
#define vtkPNGReader_h
 
#include "vtkIOImageModule.h" // For export macro
#include "vtkImageReader2.h"
#include "vtkSmartPointer.h" // For vtkSmartPointer
 
VTK_ABI_NAMESPACE_BEGIN
class vtkStringArray;
VTK_ABI_NAMESPACE_END
 
VTK_ABI_NAMESPACE_BEGIN
class VTKIOIMAGE_EXPORT vtkPNGReader : public vtkImageReader2
{
public:
  static vtkPNGReader* New();
  vtkTypeMacro(vtkPNGReader, vtkImageReader2);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  int CanReadFile(VTK_FILEPATH const char* fname) override;
  int CanReadFile(vtkResourceStream* stream) override;

  const char* GetFileExtensions() override { return ".png"; }

  const char* GetDescriptiveName() override { return "PNG"; }

  void GetTextChunks(const char* key, int beginEndIndex[2]);


  const char* GetTextKey(int index);
  vtkStringArray* GetTextKeys();


  const char* GetTextValue(int index);
  vtkStringArray* GetTextValues();

  size_t GetNumberOfTextChunks();


  vtkSetMacro(ReadSpacingFromFile, bool);
  vtkGetMacro(ReadSpacingFromFile, bool);
  vtkBooleanMacro(ReadSpacingFromFile, bool);
protected:
  vtkPNGReader();
  ~vtkPNGReader() override;
 
  void ExecuteInformation() override;
  void ExecuteDataWithInformation(vtkDataObject* out, vtkInformation* outInfo) override;
  template <class OT>
  void vtkPNGReaderUpdate(vtkImageData* data, OT* outPtr);
  template <class OT>
  void vtkPNGReaderUpdate2(OT* outPtr, int* outExt, vtkIdType* outInc, long pixSize);
 
private:
  vtkPNGReader(const vtkPNGReader&) = delete;
  void operator=(const vtkPNGReader&) = delete;
 
  class vtkInternals;
  vtkInternals* Internals;
  bool ReadSpacingFromFile;
};
VTK_ABI_NAMESPACE_END
#endif