Method ReadReducedImage

Rendering/Parallel/vtkParallelRenderManager.cxx:1463–1507

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//------------------------------------------------------------------------------
void vtkParallelRenderManager::ReadReducedImage()
{
  if (this->ReducedImageUpToDate)
  {
    return;
  }

  this->Timer->StartTimer();

  if (this->ImageReductionFactor > 1)
  {
    if (this->UseRGBA)
    {
      this->RenderWindow->GetRGBACharPixelData(0, 0, this->ReducedImageSize[0] - 1,
        this->ReducedImageSize[1] - 1, this->ChooseBuffer(), this->ReducedImage);
    }
    else
    {
      this->RenderWindow->GetPixelData(0, 0, this->ReducedImageSize[0] - 1,
        this->ReducedImageSize[1] - 1, this->ChooseBuffer(), this->ReducedImage);
    }
  }
  else
  {
    if (this->UseRGBA)
    {
      this->RenderWindow->GetRGBACharPixelData(0, 0, this->FullImageSize[0] - 1,
        this->FullImageSize[1] - 1, this->ChooseBuffer(), this->FullImage);
    }
    else
    {
      this->RenderWindow->GetPixelData(0, 0, this->FullImageSize[0] - 1, this->FullImageSize[1] - 1,
        this->ChooseBuffer(), this->FullImage);
    }
    this->FullImageUpToDate = 1;
    this->ReducedImage->SetNumberOfComponents(this->FullImage->GetNumberOfComponents());
    this->ReducedImage->SetArray(this->FullImage->GetPointer(0), this->FullImage->GetDataSize(), 1);
    this->ReducedImage->SetNumberOfTuples(this->FullImage->GetNumberOfTuples());
  }

  this->Timer->StopTimer();
  this->ImageProcessingTime += this->Timer->GetElapsedTime();

  this->ReducedImageUpToDate = 1;
}

//------------------------------------------------------------------------------
void vtkParallelRenderManager::GetPixelData(vtkUnsignedCharArray* data)