Function GetBase64EncodedImage

Web/Core/vtkDataEncoder.cxx:234–246

Once an imagedata has been written to memory as a jpg or png, this convenience function can encode that image as a Base64 string.

  // Once an imagedata has been written to memory as a jpg or png, this
  // convenience function can encode that image as a Base64 string.
  const char* GetBase64EncodedImage(vtkUnsignedCharArray* encodedInputImage)
  {
    this->LastBase64Image->SetNumberOfComponents(1);
    this->LastBase64Image->SetNumberOfTuples(
      std::ceil(1.5 * encodedInputImage->GetNumberOfTuples()));
    unsigned long size = vtkBase64Utilities::Encode(encodedInputImage->GetPointer(0),
      encodedInputImage->GetNumberOfTuples(), this->LastBase64Image->GetPointer(0), /*mark_end=*/0);

    this->LastBase64Image->SetNumberOfTuples(static_cast<vtkIdType>(size) + 1);
    this->LastBase64Image->SetValue(size, 0);

    return reinterpret_cast<char*>(this->LastBase64Image->GetPointer(0));
  }
};

vtkStandardNewMacro(vtkDataEncoder);