Method SaveAsPNG

Modules/Core/TestingHelper/src/mitkRenderingTestHelper.cpp:193–209

method to save a screenshot of the renderwindow (e.g. create a reference screenshot)

// method to save a screenshot of the renderwindow (e.g. create a reference screenshot)
void mitk::RenderingTestHelper::SaveAsPNG(std::string fileName)
{
  vtkSmartPointer<vtkRenderer> renderer = this->GetVtkRenderer();
  bool doubleBuffering(renderer->GetRenderWindow()->GetDoubleBuffer());
  renderer->GetRenderWindow()->DoubleBufferOff();

  vtkSmartPointer<vtkRenderLargeImage> magnifier = vtkSmartPointer<vtkRenderLargeImage>::New();
  magnifier->SetInput(renderer);
  magnifier->SetMagnification(1);

  vtkSmartPointer<vtkImageWriter> fileWriter = vtkSmartPointer<vtkPNGWriter>::New();
  fileWriter->SetInputConnection(magnifier->GetOutputPort());
  fileWriter->SetFileName(fileName.c_str());

  fileWriter->Write();
  renderer->GetRenderWindow()->SetDoubleBuffer(doubleBuffering);
}

void mitk::RenderingTestHelper::SetAutomaticallyCloseRenderWindow(bool automaticallyCloseRenderWindow)
{