Method SaveAsPNG

Rendering/Parallel/vtkSynchronizedRenderers.cxx:698–717

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//------------------------------------------------------------------------------
void vtkSynchronizedRenderers::vtkRawImage::SaveAsPNG(const char* filename)
{
  if (!this->IsValid())
  {
    vtkGenericWarningMacro("Image is not valid. Cannot save PNG.");
    return;
  }

  vtkNew<vtkImageData> img;
  img->SetDimensions(this->Size[0], this->Size[1], 1);
  img->AllocateScalars(VTK_UNSIGNED_CHAR, this->Data->GetNumberOfComponents());
  auto scalars = vtkUnsignedCharArray::FastDownCast(img->GetPointData()->GetScalars());
  std::copy_n(this->GetRawPtr()->GetPointer(0),
    this->Size[0] * this->Size[1] * this->Data->GetNumberOfComponents(), scalars->GetPointer(0));

  vtkNew<vtkPNGWriter> writer;
  writer->SetFileName(filename);
  writer->SetInputData(img);
  writer->Write();
}

//------------------------------------------------------------------------------
bool vtkSynchronizedRenderers::vtkRawImage::PushToViewport(vtkRenderer* ren, bool blend)