Method StartRender

Rendering/Parallel/vtkParallelRenderManager.cxx:457–634

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//------------------------------------------------------------------------------
void vtkParallelRenderManager::StartRender()
{
  vtkParallelRenderManager::RenderWindowInfo winInfo;
  vtkParallelRenderManager::RendererInfo renInfo;
  vtkParallelRenderManager::LightInfo lightInfo;

  vtkDebugMacro("StartRender");

  if ((this->Controller == nullptr) || (this->Lock))
  {
    return;
  }
  this->Lock = 1;

  this->FullImageUpToDate = 0;
  this->ReducedImageUpToDate = 0;
  this->RenderWindowImageUpToDate = 0;

  if (this->FullImage->GetPointer(0) == this->ReducedImage->GetPointer(0))
  {
    // "Un-share" pointer for full/reduced images in case we need separate
    // arrays this run.
    this->ReducedImage->Initialize();
  }

  if (!this->ParallelRendering)
  {
    this->Lock = 0;
    return;
  }

  this->InvokeEvent(vtkCommand::StartEvent, nullptr);

  this->ImageProcessingTime = 0;

  // Used to time the total render (without compositing).
  this->Timer->StartTimer();

  if (this->AutoImageReductionFactor)
  {
    this->SetImageReductionFactorForUpdateRate(this->RenderWindow->GetDesiredUpdateRate());
  }

  // Make adjustments for window size.
  int* tilesize;
  if (this->ForceRenderWindowSize)
  {
    tilesize = this->ForcedRenderWindowSize;
  }
  else
  {
    tilesize = this->RenderWindow->GetActualSize();
  }
  int size[2];
  size[0] = tilesize[0];
  size[1] = tilesize[1];
  if ((size[0] == 0) || (size[1] == 0))
  {