// SPDX-FileCopyrightText: Copyright (c) Kitware Inc.
// SPDX-FileCopyrightText: Copyright (c) 2017, NVIDIA CORPORATION
// SPDX-License-Identifier: BSD-3-Clause
#include "vtkPVRenderView.h"

#include "vtk3DWidgetRepresentation.h"
#include "vtkAbstractMapper.h"
#include "vtkAlgorithmOutput.h"
#include "vtkBoundingBox.h"
#include "vtkCamera.h"
#include "vtkCameraOrientationRepresentation.h"
#include "vtkCameraOrientationWidget.h"
#include "vtkCollection.h"
#include "vtkCommand.h"
#include "vtkCommunicator.h"
#include "vtkCuller.h"
#include "vtkDataRepresentation.h"
#include "vtkFXAAOptions.h"
#include "vtkFloatArray.h"
#include "vtkInformation.h"
#include "vtkInformationDoubleKey.h"
#include "vtkInformationDoubleVectorKey.h"
#include "vtkInformationIntegerKey.h"
#include "vtkInformationObjectBaseKey.h"
#include "vtkInformationRequestKey.h"
#include "vtkInformationStringKey.h"
#include "vtkInformationVector.h"
#include "vtkIntArray.h"
#include "vtkInteractorStyleDrawPolygon.h"
#include "vtkInteractorStyleRubberBand3D.h"
#include "vtkInteractorStyleRubberBandZoom.h"
#include "vtkLegendScaleActor.h"
#include "vtkLight.h"
#include "vtkLightKit.h"
#include "vtkMPIMoveData.h"
#include "vtkMath.h"
#include "vtkMatrix4x4.h"
#include "vtkMemberFunctionCommand.h"
#include "vtkMultiProcessController.h"
#include "vtkMultiProcessStream.h"
#include "vtkNew.h"
#include "vtkObjectFactory.h"
#include "vtkOrderedCompositingHelper.h"
#include "vtkPVAxesWidget.h"
#include "vtkPVCameraCollection.h"
#include "vtkPVCenterAxesActor.h"
#include "vtkPVClientServerSynchronizedRenderers.h"
#include "vtkPVCompositeRepresentation.h"
#include "vtkPVDataRepresentation.h"
#include "vtkPVGridAxes3DActor.h"
#include "vtkPVHardwareSelector.h"
#include "vtkPVInteractorStyle.h"
#include "vtkPVLogger.h"
#include "vtkPVMaterialLibrary.h"
#include "vtkPVRenderViewDataDeliveryManager.h"
#include "vtkPVRenderViewSettings.h"
#include "vtkPVServerInformation.h"
#include "vtkPVSession.h"
#include "vtkPVStreamingMacros.h"
#include "vtkPVSynchronizedRenderer.h"
#include "vtkPVTrackballEnvironmentRotate.h"
#include "vtkPVTrackballMultiRotate.h"
#include "vtkPVTrackballRoll.h"
#include "vtkPVTrackballRotate.h"
#include "vtkPVTrackballZoom.h"
#include "vtkPVTrackballZoomToMouse.h"
#include "vtkPVView.h"
#include "vtkPointData.h"
#include "vtkPolarAxesActor2D.h"
#include "vtkProcessModule.h"
#include "vtkRenderViewBase.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkSelection.h"
#include "vtkSelectionNode.h"
#include "vtkSkybox.h"
#include "vtkSmartPointer.h"
#include "vtkStreamingDemandDrivenPipeline.h"
#include "vtkTextActor.h"
#include "vtkTextProperty.h"
#include "vtkTextRepresentation.h"
#include "vtkTexture.h"
#include "vtkTimerLog.h"
#include "vtkToneMappingPass.h"
#include "vtkTrackballPan.h"
#include "vtkTrivialProducer.h"
#include "vtkValuePass.h"
#include "vtkVector.h"
#include "vtkWeakPointer.h"
#include "vtkWindowToImageFilter.h"

#if VTK_MODULE_ENABLE_ParaView_icet
#include "vtkIceTSynchronizedRenderers.h"
#endif

#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
#include "vtkOSPRayLightNode.h"
#include "vtkOSPRayMaterialLibrary.h"
#include "vtkOSPRayPass.h"
#include "vtkOSPRayRendererNode.h"
#endif

#include <cassert>
#include <map>
#include <set>
#include <sstream>
#include <vector>
namespace
{
struct ValuePassStateT
{
  bool CameraOrientationWidgetVisibility;
  bool OrientationAxesVisibility;
  bool AnnotationVisibility;
  bool CenterAxesVisibility;
};
}

class vtkPVRenderView::vtkInternals
{
  std::map<int, vtkWeakPointer<vtkPVDataRepresentation>> PropMap;

public:
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkSmartPointer<vtkOSPRayPass> OSPRayPass = nullptr;
#endif

  vtkSmartPointer<vtkImageProcessingPass> SavedImageProcessingPass;
  vtkNew<vtkToneMappingPass> ToneMappingPass;
  vtkSmartPointer<vtkRenderPass> SavedRenderPass;

  // State variables to maintain flags between BeginValuePassForRendering
  // and EndValueCapture.
  vtkNew<vtkValuePass> ValuePasses;
  std::unique_ptr<ValuePassStateT> ValuePassState;

  bool IsInOSPRay;
  bool OSPRayShadows;
  bool OSPRayDenoise;
  int OSPRayCount;
  vtkNew<vtkFloatArray> ArrayHolder;
  vtkNew<vtkWindowToImageFilter> ZGrabber;

  void RegisterSelectionProp(int id, vtkProp*, vtkPVDataRepresentation* rep)
  {
    this->PropMap[id] = rep;
  }
  void UnRegisterSelectionProp(vtkProp* prop, vtkPVDataRepresentation* rep)
  {
    (void)prop;
    (void)rep;
  }
  void ClearSelectionProps() { this->PropMap.clear(); }

  vtkPVDataRepresentation* GetRepresentationForPropId(int id)
  {
    std::map<int, vtkWeakPointer<vtkPVDataRepresentation>>::iterator iter = this->PropMap.find(id);
    return (iter != this->PropMap.end() ? iter->second : nullptr);
  }

  void PreRender(vtkRenderViewBase* vtkNotUsed(renderView)) {}
};

namespace
{
// In multi-process rendering modes, data delivered to a set of ranks is not
// not cleared until the data pipeline updates. This avoids having to
// redeliver data when simply switching between remote and local rendering
// modes. Now consider this case. You're rendering a Sphere in client-server
// mode with remote rendering disabled; the geometry is delivered to the
// client. Next, you switch to force remote-rendering; the geometry delivered
// to the client is still there and hence will get rendered, even through
// we'll replace the pixels with those obtained from the server. Hence, we
// need to cull the props in the composited renderer on the local process when
// it's not participating in the compositing. This culler enables us to do
// that. We also add support to add props to the DoNotCullList since the
// vtkPVGridAxes3DActor is an exception to this rule.
class vtkPVRendererCuller : public vtkCuller
{
public:
  static vtkPVRendererCuller* New();
  vtkTypeMacro(vtkPVRendererCuller, vtkCuller);

  double Cull(
    vtkRenderer* vtkNotUsed(ren), vtkProp** propList, int& listLength, int& initialized) override
  {
    double total_time = 0;
    if (listLength <= 0)
    {
      return total_time;
    }
    double* allocatedTimeList = new double[listLength];
    for (int propLoop = 0; propLoop < listLength; ++propLoop)
    {
      // Get the prop out of the list
      vtkProp* prop = propList[propLoop];
      double prop_time = initialized ? prop->GetRenderTimeMultiplier() : 1.0;
      if (this->RenderOnLocalProcess == false &&
        this->DoNotCullList.find(prop) == this->DoNotCullList.end())
      {
        prop_time = 0;
      }
      prop->SetRenderTimeMultiplier(prop_time);
      allocatedTimeList[propLoop] = prop_time;
      total_time += prop_time;
    }

    // ========================================================================
    // The following code is borrowed from vtkFrustumCoverageCuller.
    // ========================================================================
    // Now traverse the list from the beginning, swapping any zero entries back
    // in the list, while preserving the order of the non-zero entries. This
    // requires two indices for the two items we are comparing at any step.
    // The second index always moves back by one, but the first index moves back
    // by one only when it is pointing to something that has a non-zero value.
    int index1 = 0, index2 = 0;
    for (index2 = 1; index2 < listLength; index2++)
    {
      if (allocatedTimeList[index1] == 0.0)
      {
        if (allocatedTimeList[index2] != 0.0)
        {
          allocatedTimeList[index1] = allocatedTimeList[index2];
          propList[index1] = propList[index2];
          propList[index2] = nullptr;
          allocatedTimeList[index2] = 0.0;
        }
        else
        {
          propList[index1] = propList[index2] = nullptr;
          allocatedTimeList[index1] = allocatedTimeList[index2] = 0.0;
        }
      }
      if (allocatedTimeList[index1] != 0.0)
      {
        index1++;
      }
    }
    // Compute the new list length - index1 is always pointing to the
    // first 0.0 entry or the last entry if none were zero (in which case
    // we won't change the list length)
    listLength = (allocatedTimeList[index1] == 0.0) ? (index1) : listLength;
    delete[] allocatedTimeList;
    return total_time;
  }

  vtkSetMacro(RenderOnLocalProcess, bool);
  vtkGetMacro(RenderOnLocalProcess, bool);

  // List of props to never cull.
  std::set<void*> DoNotCullList;

private:
  vtkPVRendererCuller()
    : RenderOnLocalProcess(false)
  {
  }
  ~vtkPVRendererCuller() override = default;
  bool RenderOnLocalProcess;
};
vtkStandardNewMacro(vtkPVRendererCuller);

#if VTK_MODULE_ENABLE_ParaView_icet
//------------------------------------------------------------------------------
// vtkIceTCompositePass needs to know the set RenderPass will read from its
// internal float FBO in order to setup an adequate context.
void IceTPassEnableFloatPass(bool enable, vtkPVSynchronizedRenderer* sr)
{
  vtkIceTSynchronizedRenderers* iceTRen =
    vtkIceTSynchronizedRenderers::SafeDownCast(sr->GetParallelSynchronizer());

  if (iceTRen)
  {
    vtkIceTCompositePass* iceTPass = iceTRen->GetIceTCompositePass();
    if (iceTPass)
    {
      iceTPass->SetEnableFloatValuePass(enable);
    }
  }
};
#endif

//----------------------------------------------------------------------------
// This is used in vtkPVRenderView::Update() to change all zoom manipulators to
// zoom (and not dolly) when a discrete set of cameras are provided. This is
// essential since dolly changes camera position.
void vtkUpdateTrackballZoomManipulators(
  vtkPVInteractorStyle* style, bool useDollyForPerspectiveProjection)
{
  if (style == nullptr)
  {
    return;
  }

  vtkCollection* manips = style->GetCameraManipulators();
  for (int cc = 0, max = manips->GetNumberOfItems(); cc < max; ++cc)
  {
    vtkPVTrackballZoom* zoom = vtkPVTrackballZoom::SafeDownCast(manips->GetItemAsObject(cc));
    if (zoom)
    {
      zoom->SetUseDollyForPerspectiveProjection(useDollyForPerspectiveProjection);
    }
  }
}
}

//----------------------------------------------------------------------------
vtkObjectFactoryNewMacro(vtkPVRenderView);
vtkInformationKeyMacro(vtkPVRenderView, USE_LOD, Integer);
vtkInformationKeyMacro(vtkPVRenderView, USE_OUTLINE_FOR_LOD, Integer);
vtkInformationKeyMacro(vtkPVRenderView, LOD_RESOLUTION, Double);
vtkInformationKeyMacro(vtkPVRenderView, NEED_ORDERED_COMPOSITING, Integer);
vtkInformationKeyMacro(vtkPVRenderView, RENDER_EMPTY_IMAGES, Integer);
vtkInformationKeyMacro(vtkPVRenderView, REQUEST_STREAMING_UPDATE, Request);
vtkInformationKeyMacro(vtkPVRenderView, REQUEST_PROCESS_STREAMED_PIECE, Request);
vtkInformationKeyRestrictedMacro(vtkPVRenderView, VIEW_PLANES, DoubleVector, 24);

vtkCxxSetObjectMacro(vtkPVRenderView, LastSelection, vtkSelection);

#define VTK_STEREOTYPE_SAME_AS_CLIENT 0

//----------------------------------------------------------------------------
vtkPVRenderView::vtkPVRenderView()
  : StereoType(VTK_STEREO_RED_BLUE)
  , ServerStereoType(VTK_STEREOTYPE_SAME_AS_CLIENT)
{
  this->Internals = new vtkInternals();
  this->Internals->IsInOSPRay = false;
  this->Internals->OSPRayShadows = false;
  this->Internals->OSPRayDenoise = true;
  this->Internals->OSPRayCount = 0;

  this->RemoteRenderingAvailable = true;

  this->LockBounds = false;

  this->StillRenderProcesses = vtkPVSession::NONE;
  this->InteractiveRenderProcesses = vtkPVSession::NONE;
  this->UsedLODForLastRender = false;
  this->UseLODForInteractiveRender = false;
  this->UseDistributedRenderingForRender = false;
  this->UseDistributedRenderingForLODRender = false;
  this->MakingSelection = false;
  this->PreviousSwapBuffers = 0;
  this->StillRenderImageReductionFactor = 1;
  this->InteractiveRenderImageReductionFactor = 2;
  this->RemoteRenderingThreshold = 0;
  this->LODRenderingThreshold = 0;
  this->LODResolution = 0.5;
  this->UseOutlineForLODRendering = false;
  this->UseLightKit = false;
  this->Interactor = nullptr;
  this->InteractorStyle = nullptr;
  this->TwoDInteractorStyle = nullptr;
  this->ThreeDInteractorStyle = nullptr;
  this->DiscreteCameras = nullptr;
  this->PolygonStyle = nullptr;
  this->RubberBandStyle = nullptr;
  this->RubberBandZoom = nullptr;
  this->CenterAxes = vtkPVCenterAxesActor::New();
  this->CenterAxes->SetComputeNormals(0);
  this->CenterAxes->SetPickable(0);
  this->CenterAxes->SetScale(0.25, 0.25, 0.25);
  this->OrientationWidget = vtkPVAxesWidget::New();
  this->InteractionMode = INTERACTION_MODE_UNINTIALIZED;
  this->LastSelection = nullptr;
  this->UseInteractiveRenderingForScreenshots = false;
  this->Selector = vtkSmartPointer<vtkPVHardwareSelector>::New();
  this->Selector->SetView(this); // not reference counted.
  this->NeedsOrderedCompositing = false;
  this->RenderEmptyImages = false;
  this->UseFXAA = false;
  this->UseSSAO = false;
  this->UseSSAODefaultPresets = true;
  this->Radius = 0.5;
  this->Bias = 0.01;
  this->KernelSize = 32;
  this->Blur = false;
  this->UseToneMapping = false;
  this->DistributedRenderingRequired = false;
  this->NonDistributedRenderingRequired = false;
  this->DistributedRenderingRequiredLOD = false;
  this->NonDistributedRenderingRequiredLOD = false;
  this->ParallelProjection = 0;
  this->Culler = vtkSmartPointer<vtkPVRendererCuller>::New();
  this->ForceDataDistributionMode = -1;
  this->PreviousDiscreteCameraIndex = -1;
  this->SuppressRendering = false;
  this->BackgroundColorMode = vtkPVRenderView::DEFAULT;
  this->UseEnvironmentLighting = false;
  this->UseRenderViewSettingsForBackground = true;
  this->Background[0] = this->Background[1] = this->Background[2] = 0.0;
  this->Background2[0] = this->Background2[1] = this->Background2[2] = 0.0;
  this->UseTexturedEnvironmentalBG = false;

  auto window = this->GetRenderWindow();
  assert(window);

  window->SetMultiSamples(0);
  this->RenderView = vtkRenderViewBase::New();
  this->RenderView->SetRenderWindow(window);

  this->NonCompositedRenderer = vtkRenderer::New();
  this->NonCompositedRenderer->EraseOff();
  this->NonCompositedRenderer->InteractiveOff();
  this->NonCompositedRenderer->SetLayer(2);
  this->NonCompositedRenderer->SetActiveCamera(this->RenderView->GetRenderer()->GetActiveCamera());
  window->AddRenderer(this->NonCompositedRenderer);
  window->SetNumberOfLayers(3);
  this->RenderView->GetRenderer()->GetActiveCamera()->ParallelProjectionOff();

  vtkMemberFunctionCommand<vtkPVRenderView>* observer =
    vtkMemberFunctionCommand<vtkPVRenderView>::New();
  observer->SetCallback(*this, &vtkPVRenderView::ResetCameraClippingRange);
  this->GetRenderer()->AddObserver(vtkCommand::ResetCameraClippingRangeEvent, observer);
  observer->FastDelete();

  this->UseHiddenLineRemoval = false;
  this->GetRenderer()->SetUseDepthPeeling(1);
  this->GetRenderer()->SetUseDepthPeelingForVolumes(1);
  this->GetRenderer()->AddCuller(this->Culler);

  this->LightKit = vtkLightKit::New();
  this->GetRenderer()->SetAutomaticLightCreation(0);

  // Setup interactor styles. Since these are only needed on the process that
  // the users interact with, we only create it on the such processes.
  if (this->GetLocalProcessSupportsInteraction())
  {
    this->InteractorStyle = // Default one will be the 3D
      this->ThreeDInteractorStyle = vtkPVInteractorStyle::New();
    this->TwoDInteractorStyle = vtkPVInteractorStyle::New();

    // Add some default manipulators. Applications can override them without
    // much ado.
    vtkPVTrackballRotate* manip = vtkPVTrackballRotate::New();
    manip->SetButton(1);
    this->ThreeDInteractorStyle->AddManipulator(manip);
    manip->Delete();

    vtkPVTrackballZoom* manip2 = vtkPVTrackballZoom::New();
    manip2->SetButton(3);
    this->ThreeDInteractorStyle->AddManipulator(manip2);
    manip2->Delete();

    vtkTrackballPan* manip3 = vtkTrackballPan::New();
    manip3->SetButton(2);
    this->ThreeDInteractorStyle->AddManipulator(manip3);
    manip3->Delete();

    vtkTrackballPan* manip4 = vtkTrackballPan::New();
    manip4->SetButton(1);
    this->TwoDInteractorStyle->AddManipulator(manip4);
    manip4->Delete();

    vtkPVTrackballZoom* manip5 = vtkPVTrackballZoom::New();
    manip5->SetButton(3);
    this->TwoDInteractorStyle->AddManipulator(manip5);
    manip5->Delete();

    this->RubberBandStyle = vtkInteractorStyleRubberBand3D::New();
    this->RubberBandStyle->RenderOnMouseMoveOff();
    vtkCommand* observer2 =
      vtkMakeMemberFunctionCommand(*this, &vtkPVRenderView::OnSelectionChangedEvent);
    this->RubberBandStyle->AddObserver(vtkCommand::SelectionChangedEvent, observer2);
    observer2->Delete();

    this->RubberBandZoom = vtkInteractorStyleRubberBandZoom::New();
    this->RubberBandZoom->SetLockAspectToViewport(true);
    this->RubberBandZoom->SetUseDollyForPerspectiveProjection(false);
    this->PolygonStyle = vtkInteractorStyleDrawPolygon::New();
    vtkCommand* observer3 =
      vtkMakeMemberFunctionCommand(*this, &vtkPVRenderView::OnPolygonSelectionEvent);
    this->PolygonStyle->AddObserver(vtkCommand::SelectionChangedEvent, observer3);
    observer3->Delete();
  }

  this->CameraOrientationWidget->SetParentRenderer(this->GetRenderer());
  this->CameraOrientationWidget->AnimateOff(); // animation doesn't work with QVTKOpenGL*Widget.

  this->OrientationWidget->SetParentRenderer(this->GetRenderer());
  this->OrientationWidget->SetViewport(0, 0, 0.25, 0.25);

  this->GetRenderer()->AddActor(this->CenterAxes);

  this->SetInteractionMode(INTERACTION_MODE_3D);

  this->NonCompositedRenderer->AddActor(this->Annotation.GetPointer());
  this->Annotation->SetRenderer(this->NonCompositedRenderer);
  this->Annotation->SetText("Annotation");
  this->Annotation->BuildRepresentation();
  this->Annotation->SetWindowLocation(vtkTextRepresentation::UpperLeftCorner);
  this->Annotation->GetTextActor()->SetTextScaleModeToNone();
  this->Annotation->GetTextActor()->GetTextProperty()->SetJustificationToLeft();
  this->Annotation->SetVisibility(0);
  this->ShowAnnotation = false;
  this->UpdateAnnotation = true;

  // We update the annotation text before the 2D renderer renders.
  this->NonCompositedRenderer->AddObserver(
    vtkCommand::StartEvent, this, &vtkPVRenderView::UpdateAnnotationText);

  // Setup the vtkPVSynchronizedRenderer instance
  this->SynchronizedRenderers = vtkPVSynchronizedRenderer::New();
  this->SynchronizedRenderers->Initialize(this->GetSession());
  this->SynchronizedRenderers->SetRenderer(this->RenderView->GetRenderer());

  // Add skybox actor.
  this->GetRenderer()->AddActor(this->Skybox);
  this->Skybox->GammaCorrectOn();
  this->Skybox->SetVisibility(0);
}

//----------------------------------------------------------------------------
vtkPVRenderView::~vtkPVRenderView()
{
  vtkRenderWindow* win = this->RenderView->GetRenderWindow();
  if (win)
  {
    this->Internals->ValuePasses->ReleaseGraphicsResources(win);
    this->Internals->ToneMappingPass->ReleaseGraphicsResources(win);
  }

  // this ensure that the renderer releases graphics resources before the window
  // is destroyed.
  this->GetRenderWindow()->RemoveRenderer(this->NonCompositedRenderer);
  this->GetRenderWindow()->RemoveRenderer(this->GetRenderer());
  this->GetNonCompositedRenderer()->SetRenderWindow(nullptr);
  this->GetRenderer()->SetRenderWindow(nullptr);

  this->SetLastSelection(nullptr);
  this->SynchronizedRenderers->Delete();
  this->NonCompositedRenderer->Delete();
  this->RenderView->Delete();
  this->LightKit->Delete();
  this->CenterAxes->Delete();
  this->OrientationWidget->Delete();
  this->Interactor = nullptr;

  if (this->InteractorStyle)
  {
    // Don't want to delete it as it is only pointing to either
    // [TwoDInteractorStyle, ThreeDInteractorStyle]
    this->InteractorStyle = nullptr;
  }
  if (this->TwoDInteractorStyle)
  {
    this->TwoDInteractorStyle->Delete();
    this->TwoDInteractorStyle = nullptr;
  }
  if (this->ThreeDInteractorStyle)
  {
    this->ThreeDInteractorStyle->Delete();
    this->ThreeDInteractorStyle = nullptr;
  }
  if (this->RubberBandStyle)
  {
    this->RubberBandStyle->Delete();
    this->RubberBandStyle = nullptr;
  }
  if (this->RubberBandZoom)
  {
    this->RubberBandZoom->Delete();
    this->RubberBandZoom = nullptr;
  }
  if (this->PolygonStyle)
  {
    this->PolygonStyle->Delete();
    this->PolygonStyle = nullptr;
  }

  this->Internals->SavedRenderPass = nullptr;

  delete this->Internals;
  this->Internals = nullptr;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::NVPipeAvailableOn()
{
  this->SynchronizedRenderers->SetNVPipeSupport(true);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::NVPipeAvailableOff()
{
  this->SynchronizedRenderers->SetNVPipeSupport(false);
}

//----------------------------------------------------------------------------
int vtkPVRenderView::RegisterPropForHardwareSelection(vtkPVDataRepresentation* repr, vtkProp* prop)
{
  int id = this->Selector->AssignUniqueId(prop);
  this->Internals->RegisterSelectionProp(id, prop, repr);
  return id;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UnRegisterPropForHardwareSelection(
  vtkPVDataRepresentation* repr, vtkProp* prop)
{
  this->Internals->UnRegisterSelectionProp(prop, repr);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::AddPropToRenderer(vtkProp* prop)
{
  this->GetRenderer()->AddViewProp(prop);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::RemovePropFromRenderer(vtkProp* prop)
{
  this->GetRenderer()->RemoveViewProp(prop);
}

//----------------------------------------------------------------------------
vtkRenderer* vtkPVRenderView::GetRenderer(int rendererType)
{
  switch (rendererType)
  {
    case NON_COMPOSITED_RENDERER:
      return this->GetNonCompositedRenderer();
    case DEFAULT_RENDERER:
      return this->RenderView->GetRenderer();
    default:
      return nullptr;
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetActiveCamera(vtkCamera* camera)
{
  this->GetRenderer()->SetActiveCamera(camera);
  this->GetNonCompositedRenderer()->SetActiveCamera(camera);
  if (camera)
  {
    camera->SetParallelProjection(this->ParallelProjection);
  }
}

//----------------------------------------------------------------------------
vtkCamera* vtkPVRenderView::GetActiveCamera()
{
  return this->RenderView->GetRenderer()->GetActiveCamera();
}

//----------------------------------------------------------------------------
vtkRenderWindowInteractor* vtkPVRenderView::GetInteractor()
{
  return this->Interactor;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetupInteractor(vtkRenderWindowInteractor* iren)
{
  if (this->GetLocalProcessSupportsInteraction() == false)
  {
    // We don't setup interactor on non-driver processes.
    return;
  }

  if (this->Interactor != iren)
  {
    this->Interactor = iren;

    this->OrientationWidget->SetInteractor(this->Interactor);
    this->CameraOrientationWidget->SetInteractor(this->Interactor);

    if (this->Interactor)
    {
      this->Interactor->SetRenderWindow(this->GetRenderWindow());

      // Enable camera manipulator
      this->CameraOrientationWidget->On();

      // this will set the interactor style.
      int mode = this->InteractionMode;
      this->InteractionMode = INTERACTION_MODE_UNINTIALIZED;
      this->SetInteractionMode(mode);
    }
    else
    {
      this->CameraOrientationWidget->Off();
    }

    this->Modified();
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetInteractionMode(int mode)
{
  if (this->InteractionMode != mode)
  {
    this->InteractionMode = mode;
    this->Modified();

    // If we're in a situation where we don't have an interactor (e.g. pvbatch
    // or Catalyst) we still want to set the other properties on the camera.
    switch (this->InteractionMode)
    {
      case INTERACTION_MODE_3D:
        if (this->Interactor)
        {
          this->Interactor->SetInteractorStyle(this->InteractorStyle = this->ThreeDInteractorStyle);
        }
        // Get back to the previous state
        this->GetActiveCamera()->SetParallelProjection(this->ParallelProjection);
        break;
      case INTERACTION_MODE_2D:
        if (this->Interactor)
        {
          this->Interactor->SetInteractorStyle(this->InteractorStyle = this->TwoDInteractorStyle);
        }
        this->GetActiveCamera()->SetParallelProjection(1);
        break;

      case INTERACTION_MODE_SELECTION:
        if (this->Interactor)
        {
          this->Interactor->SetInteractorStyle(this->RubberBandStyle);
        }
        break;

      case INTERACTION_MODE_POLYGON:
        if (this->Interactor)
        {
          this->Interactor->SetInteractorStyle(this->PolygonStyle);
        }
        break;

      case INTERACTION_MODE_ZOOM:
        if (this->Interactor)
        {
          this->Interactor->SetInteractorStyle(this->RubberBandZoom);
        }
        break;
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetLegendGridActor(vtkLegendScaleActor* gridActor)
{
  if (this->LegendGridActor != gridActor)
  {
    vtkPVRendererCuller* culler = vtkPVRendererCuller::SafeDownCast(this->Culler.GetPointer());
    if (this->LegendGridActor)
    {
      this->GetRenderer()->RemoveViewProp(this->LegendGridActor);
      culler->DoNotCullList.erase(this->LegendGridActor);
    }
    this->LegendGridActor = gridActor;
    if (this->LegendGridActor)
    {
      this->LegendGridActor->SetUseFontSizeFromProperty(true);
      this->LegendGridActor->SetSnapToGrid(true);
      this->LegendGridActor->SetLabelModeToCoordinates();
      this->LegendGridActor->LegendVisibilityOff();
      this->LegendGridActor->SetCornerOffsetFactor(1);

      this->GetRenderer()->AddViewProp(this->LegendGridActor);
      culler->DoNotCullList.insert(this->LegendGridActor);
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetPolarGridActor(vtkPolarAxesActor2D* polarActor)
{
  if (this->PolarAxesActor != polarActor)
  {
    vtkPVRendererCuller* culler = vtkPVRendererCuller::SafeDownCast(this->Culler);
    if (this->PolarAxesActor)
    {
      this->GetRenderer()->RemoveViewProp(this->PolarAxesActor);
      culler->DoNotCullList.erase(this->PolarAxesActor);
    }
    this->PolarAxesActor = polarActor;
    if (this->PolarAxesActor)
    {
      this->GetRenderer()->AddViewProp(this->PolarAxesActor);
      culler->DoNotCullList.insert(this->PolarAxesActor);
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetGridAxes3DActor(vtkPVGridAxes3DActor* gridActor)
{
  if (this->GridAxes3DActor != gridActor)
  {
    vtkPVRendererCuller* culler = vtkPVRendererCuller::SafeDownCast(this->Culler.GetPointer());
    // we currently don't support grid axes in tile-display mode.
    const bool in_tile_display_mode = this->InTileDisplayMode();
    if (this->GridAxes3DActor)
    {
      this->GetRenderer()->RemoveViewProp(this->GridAxes3DActor);
      culler->DoNotCullList.erase(this->GridAxes3DActor);
    }
    this->GridAxes3DActor = gridActor;
    if (this->GridAxes3DActor && !in_tile_display_mode)
    {
      this->GetRenderer()->AddViewProp(this->GridAxes3DActor);
      culler->DoNotCullList.insert(this->GridAxes3DActor);
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::OnSelectionChangedEvent()
{
  int region[4];
  this->RubberBandStyle->GetStartPosition(&region[0]);
  this->RubberBandStyle->GetEndPosition(&region[2]);

  // NOTE: This gets called on the driver i.e. client or root-node in batch
  // mode. That's not necessarily the node on which the selection can be
  // made, since data may not be on this process.

  // selection is a data-selection (not geometry selection).
  int ordered_region[4];
  ordered_region[0] = region[0] < region[2] ? region[0] : region[2];
  ordered_region[2] = region[0] > region[2] ? region[0] : region[2];
  ordered_region[1] = region[1] < region[3] ? region[1] : region[3];
  ordered_region[3] = region[1] > region[3] ? region[1] : region[3];

  this->InvokeEvent(vtkCommand::SelectionChangedEvent, ordered_region);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::OnPolygonSelectionEvent()
{
  // NOTE: This gets called on the driver i.e. client or root-node in batch
  // mode. That's not necessarily the node on which the selection can be
  // made, since data may not be on this process. selection is a
  // data-selection (not geometry selection).
  std::vector<vtkVector2i> points = this->PolygonStyle->GetPolygonPoints();
  if (points.size() >= 3)
  {
    vtkNew<vtkIntArray> polygonPointsArray;
    polygonPointsArray->SetNumberOfComponents(2);
    polygonPointsArray->SetNumberOfTuples(points.size());
    for (unsigned int j = 0; j < points.size(); ++j)
    {
      const vtkVector2i& v = points[j];
      int pos[2] = { v[0], v[1] };
      polygonPointsArray->SetTypedTuple(j, pos);
    }

    this->InvokeEvent(vtkCommand::SelectionChangedEvent, polygonPointsArray.GetPointer());
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SelectPoints(int region[4], const char* array)
{
  this->Select(vtkDataObject::FIELD_ASSOCIATION_POINTS, region, array);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SelectCells(int region[4], const char* array)
{
  this->Select(vtkDataObject::FIELD_ASSOCIATION_CELLS, region, array);
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::PrepareSelect(int fieldAssociation, const char* array)
{
  // NOTE: selection is only supported in builtin or client-server mode. Not
  // supported in tile-display or batch modes.

  if (this->MakingSelection)
  {
    vtkErrorMacro("Select was called while making another selection.");
    return false;
  }

  this->MakingSelection = true;
  // disable buffer swapping during selection to avoid clobbering the users
  // view (BUG #16042).
  this->PreviousSwapBuffers = this->GetRenderWindow()->GetSwapBuffers();
  this->GetRenderWindow()->SwapBuffersOff();

  // Make sure that the representations are up-to-date. This is required since
  // due to delayed-switch-back-from-lod, the most recent render maybe a LOD
  // render (or a nonremote render) in which case we need to update the
  // representation pipelines correctly.
  this->Render(/*interactive*/ false, /*skip-rendering*/ false);

  this->SetLastSelection(nullptr);

  this->Selector->SetRenderer(this->GetRenderer());
  this->Selector->SetFieldAssociation(fieldAssociation);

  if (array)
  {
    for (int i = 0; i < this->GetNumberOfRepresentations(); i++)
    {
      vtkPVDataRepresentation* repr =
        vtkPVDataRepresentation::SafeDownCast(this->GetRepresentation(i));
      if (repr)
      {
        const char* pointIdArray = nullptr;
        const char* cellIdArray = nullptr;
        if (fieldAssociation == vtkDataObject::FIELD_ASSOCIATION_POINTS)
        {
          pointIdArray = array;
        }
        else
        {
          cellIdArray = array;
        }
        // any existing custom array id names are overwritten
        repr->SetArrayIdNames(pointIdArray, cellIdArray);
      }
    }
  }

  // Disable image processing pass to preserve vertex indices in the color buffer
  // created by the hardwareSelector render pass
  this->Internals->SavedImageProcessingPass = this->SynchronizedRenderers->GetImageProcessingPass();
  this->SynchronizedRenderers->SetImageProcessingPass(nullptr);

  return true;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::Select(int fieldAssociation, int region[4], const char* array)
{
  // This gets called only the processes that are doing rendering i.e. it won't
  // be called on data server or if doing local rendering in client-server mode,
  // this won't be called on the remote processes.
  assert(this->GetLocalProcessDoesRendering(this->GetUseDistributedRenderingForRender()));

  if (!this->PrepareSelect(fieldAssociation, array))
  {
    return;
  }

  vtkSmartPointer<vtkSelection> sel;
  // we don't render labels for hardware selection
  this->NonCompositedRenderer->SetDraw(false);
  sel.TakeReference(this->Selector->Select(region));
  this->NonCompositedRenderer->SetDraw(true);
  this->PostSelect(sel, array);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::PostSelect(vtkSelection* sel, const char* array)
{
  if (sel)
  {
    // valid selection is only generated on the driver process. Other's are
    // merely rendering the passes so that the result is composited correctly.
    this->FinishSelection(sel, array);
  }
  // look at ::Render(..,..). We need to disable these once we are done with
  // rendering.
  this->SynchronizedRenderers->SetEnabled(false);

  // restore ids
  for (int i = 0; i < this->GetNumberOfRepresentations(); i++)
  {
    vtkPVDataRepresentation* repr =
      vtkPVDataRepresentation::SafeDownCast(this->GetRepresentation(i));
    if (repr)
    {
      // restore the array id names to the original ones
      repr->SetArrayIdNames(nullptr, nullptr);
    }
  }

  // Restore image processing pass
  this->SynchronizedRenderers->SetImageProcessingPass(this->Internals->SavedImageProcessingPass);

  this->MakingSelection = false;
  this->GetRenderWindow()->SetSwapBuffers(this->PreviousSwapBuffers);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SelectPolygonPoints(int* polygonPoints, vtkIdType arrayLen)
{
  this->SelectPolygon(vtkDataObject::FIELD_ASSOCIATION_POINTS, polygonPoints, arrayLen);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SelectPolygonCells(int* polygonPoints, vtkIdType arrayLen)
{
  this->SelectPolygon(vtkDataObject::FIELD_ASSOCIATION_CELLS, polygonPoints, arrayLen);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SelectPolygon(int fieldAssociation, int* polygonPoints, vtkIdType arrayLen)
{
  // This gets called only the processes that are doing rendering i.e. it won't
  // be called on data server or if doing local rendering in client-server mode,
  // this won't be called on the remote processes.
  assert(this->GetLocalProcessDoesRendering(this->GetUseDistributedRenderingForRender()));

  if (!this->PrepareSelect(fieldAssociation))
  {
    return;
  }

  vtkSmartPointer<vtkSelection> sel;
  // we don't render labels for hardware selection
  this->NonCompositedRenderer->SetDraw(false);
  sel.TakeReference(this->Selector->PolygonSelect(polygonPoints, arrayLen));
  this->NonCompositedRenderer->SetDraw(true);
  this->PostSelect(sel);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::FinishSelection(vtkSelection* sel, const char* array)
{
  assert(sel != nullptr);

  // first, convert local-prop ids to ids that the data-server can understand if
  // the selection was done without compositing, i.e. rendering happened on the
  // client side.
  for (unsigned int cc = 0; cc < sel->GetNumberOfNodes(); cc++)
  {
    vtkSelectionNode* node = sel->GetNode(cc);
    if (node->GetProperties()->Has(vtkSelectionNode::PROP_ID()))
    {
      int propid = node->GetProperties()->Get(vtkSelectionNode::PROP_ID());
      vtkPVDataRepresentation* repr = this->Internals->GetRepresentationForPropId(propid);
      if (repr)
      {
        node->GetProperties()->Set(vtkSelectionNode::SOURCE(), repr);
      }
    }
    if (array)
    {
      // rename selection arrays
      node->SetContentType(vtkSelectionNode::VALUES);
      auto selectionData = node->GetSelectionData();
      for (int i = 0; i < selectionData->GetNumberOfArrays(); i++)
      {
        node->GetSelectionData()->GetArray(i)->SetName(array);
      }
    }
  }

  this->SetLastSelection(sel);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetLockBounds(bool nv)
{
  if (this->LockBounds == nv)
  {
    return;
  }
  this->LockBounds = nv;
  this->Modified();
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetMaxClipBounds(double* bounds)
{
  this->GeometryBounds.SetBounds(bounds);
  this->GetRenderer()->ResetCameraClippingRange(bounds);
  this->GetNonCompositedRenderer()->ResetCameraClippingRange(bounds);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::ResetCameraClippingRange()
{
  if (this->GeometryBounds.IsValid() && !this->LockBounds && this->DiscreteCameras == nullptr)
  {
    double bounds[6];
    this->GeometryBounds.GetBounds(bounds);
    this->GetRenderer()->ResetCameraClippingRange(bounds);
    this->GetNonCompositedRenderer()->ResetCameraClippingRange(bounds);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SynchronizeGeometryBounds()
{
  vtkBoundingBox bbox;
  if (this->GetLocalProcessDoesRendering(/*using_distributed_rendering*/ false))
  {
    // get local bounds to consider 3D widgets correctly.
    // if ComputeVisiblePropBounds is called when there's no real window on the
    // local process, all vtkWidgetRepresentations return wacky Z bounds which
    // screws up the renderer and we don't see any images. Hence we skip this on
    // non-rendering nodes.
    this->CenterAxes->SetUseBounds(0);
    if (this->GridAxes3DActor)
    {
      this->GridAxes3DActor->SetUseBounds(0);
    }
    double prop_bounds[6];
    this->GetRenderer()->ComputeVisiblePropBounds(prop_bounds);
    this->CenterAxes->SetUseBounds(1);
    if (this->GridAxes3DActor)
    {
      this->GridAxes3DActor->SetUseBounds(1);
    }

    bbox.AddBounds(prop_bounds);
  }

  // accumulate visible geometry bounds reported by representations.
  auto deliveryManager =
    vtkPVRenderViewDataDeliveryManager::SafeDownCast(this->GetDeliveryManager());
  for (int cc = 0, num_reprs = this->GetNumberOfRepresentations(); cc < num_reprs; ++cc)
  {
    if (auto pvrepr = vtkPVDataRepresentation::SafeDownCast(this->GetRepresentation(cc)))
    {
      if (!pvrepr->GetVisibility())
      {
        continue;
      }

      for (int port = 0, num_ports = deliveryManager->GetNumberOfPorts(pvrepr); port < num_ports;
           ++port)
      {
        bbox.AddBox(deliveryManager->GetTransformedGeometryBounds(pvrepr, port));
      }
    }
  }

  // sync up bounds across all processes when doing distributed rendering.
  this->GeometryBounds.Reset();
  this->AllReduce(bbox, this->GeometryBounds);
  if (!this->GeometryBounds.IsValid())
  {
    this->GeometryBounds.SetBounds(-1, 1, -1, 1, -1, 1);
  }

  this->UpdateCenterAxes();
  this->ResetCameraClippingRange();
}

//----------------------------------------------------------------------------
double* vtkPVRenderView::ComputeVisibleBounds(vtkPVDataRepresentation* pvrepr)
{
  // Reset RepresentationVisibleBounds
  vtkBoundingBox bbox(1, -1, 1, -1, 1, -1);
  bbox.GetBounds(this->LastRepresentationVisibleBounds);

  // Get the active representation from composite repr if any
  auto compRepr = vtkPVCompositeRepresentation::SafeDownCast(pvrepr);
  if (compRepr)
  {
    pvrepr = compRepr->GetActiveRepresentation();
  }

  // Recover visible bounds
  if (pvrepr && pvrepr->GetVisibility())
  {
    auto deliveryManager =
      vtkPVRenderViewDataDeliveryManager::SafeDownCast(this->GetDeliveryManager());
    bbox.Reset();
    for (int port = 0, num_ports = deliveryManager->GetNumberOfPorts(pvrepr); port < num_ports;
         ++port)
    {
      bbox.AddBox(deliveryManager->GetTransformedGeometryBounds(pvrepr, port));
    }
  }

  // Reduce bounds
  vtkBoundingBox result;
  this->AllReduce(bbox, result);
  if (!result.IsValid())
  {
    result.SetBounds(1, -1, 1, -1, 1, -1);
  }

  result.GetBounds(this->LastRepresentationVisibleBounds);
  return this->LastRepresentationVisibleBounds;
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetLocalProcessDoesRendering(bool using_distributed_rendering)
{
  switch (vtkProcessModule::GetProcessType())
  {
    case vtkProcessModule::PROCESS_DATA_SERVER:
      return false;

    case vtkProcessModule::PROCESS_CLIENT:
      return true;

    case vtkProcessModule::PROCESS_BATCH:
      // in batch, this process will do rendering if it's the root node
      // or when using distributed rendering.
      return using_distributed_rendering
        ? true
        : (vtkProcessModule::GetProcessModule()->GetPartitionId() == 0);

    default:
      return using_distributed_rendering || this->InTileDisplayMode() || this->InCaveDisplayMode();
  }
}

//----------------------------------------------------------------------------
// Note this is called on all processes.
void vtkPVRenderView::ResetCamera()
{
  // Since ResetCamera() is accessible via a property on the view proxy, this
  // method gets called directly (and on on the vtkSMRenderViewProxy). Hence
  // we need to ensure things are updated explicitly and cannot rely on the View
  // proxy to take care of updating the view.
  this->Update();

  // Remember, vtkRenderer::ResetCamera() calls
  // vtkRenderer::ResetCameraClippingPlanes() with the given bounds.
  double bounds[6];
  this->GeometryBounds.GetBounds(bounds);
  this->ResetCamera(bounds);
}

//----------------------------------------------------------------------------
// Note this is called on all processes.
void vtkPVRenderView::ResetCamera(double bounds[6])
{
  // Remember, vtkRenderer::ResetCamera() calls
  // vtkRenderer::ResetCameraClippingPlanes() with the given bounds.
  if (!this->LockBounds)
  {
    this->RenderView->GetRenderer()->ResetCamera(bounds);
  }
  this->InvokeEvent(vtkCommand::ResetCameraEvent);
}

//----------------------------------------------------------------------------
// Note this is called on all processes.
void vtkPVRenderView::ResetCameraScreenSpace(double offsetRatio)
{
  // Since ResetCameraScreenSpace() is accessible via a property on the view proxy, this
  // method gets called directly (and on on the vtkSMRenderViewProxy). Hence
  // we need to ensure things are updated explicitly and cannot rely on the View
  // proxy to take care of updating the view.
  this->Update();

  // Remember, vtkRenderer::ResetCamera() calls
  // vtkRenderer::ResetCameraClippingPlanes() with the given bounds.
  double bounds[6];
  this->GeometryBounds.GetBounds(bounds);
  this->ResetCameraScreenSpace(bounds, offsetRatio);
}

//----------------------------------------------------------------------------
// Note this is called on all processes.
void vtkPVRenderView::ResetCameraScreenSpace(double* bounds, double offsetRatio)
{
  if (!this->LockBounds)
  {
    this->RenderView->GetRenderer()->ResetCameraScreenSpace(
      bounds, static_cast<double>(offsetRatio));
  }
  this->InvokeEvent(vtkCommand::ResetCameraEvent);
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::TestCollaborationCounter()
{
  vtkProcessModule* pm = vtkProcessModule::GetProcessModule();
  const auto processType = pm->GetProcessType();

  vtkPVSession* activeSession = vtkPVSession::SafeDownCast(pm->GetActiveSession());
  if (!activeSession || !activeSession->IsMultiClients())
  {
    return true;
  }

  assert(processType == vtkProcessModule::PROCESS_CLIENT ||
    processType == vtkProcessModule::PROCESS_SERVER);

  if (processType == vtkProcessModule::PROCESS_CLIENT)
  {
    auto r_controller = activeSession->GetController(vtkPVSession::RENDER_SERVER_ROOT);
    assert(r_controller != nullptr);

    auto d_controller = activeSession->GetController(vtkPVSession::DATA_SERVER_ROOT);
    if (d_controller != r_controller)
    {
      vtkErrorMacro("RenderServer-DataServer configuration is not supported in "
                    "multi-clients mode. Please restart ParaView in the right mode. "
                    "Aborting since this could cause deadlocks and other issues.");
      abort();
    }

    int magicNumber = this->GetDeliveryManager()->GetSynchronizationMagicNumber();
    r_controller->Send(&magicNumber, 1, 1, 41000);
    int server_sync_counter;
    r_controller->Receive(&server_sync_counter, 1, 1, 41001);
    return (server_sync_counter == magicNumber);
  }
  else
  {
    bool counterSynchronizedSuccessfully = false;
    // c_controller is nullptr on satellites.
    if (auto c_controller = activeSession->GetController(vtkPVSession::CLIENT))
    {
      int client_sync_counter;
      int magicNumber = this->GetDeliveryManager()->GetSynchronizationMagicNumber();
      c_controller->Receive(&client_sync_counter, 1, 1, 41000);
      c_controller->Send(&magicNumber, 1, 1, 41001);
      counterSynchronizedSuccessfully = (client_sync_counter == magicNumber);
    }

    if (auto p_controller = pm->GetGlobalController())
    {
      int temp = counterSynchronizedSuccessfully ? 1 : 0;
      p_controller->Broadcast(&temp, 1, 0);
      counterSynchronizedSuccessfully = (temp == 1);
    }
    return counterSynchronizedSuccessfully;
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SynchronizeForCollaboration()
{
  vtkProcessModule* pm = vtkProcessModule::GetProcessModule();
  const auto processType = pm->GetProcessType();

  vtkPVSession* activeSession = vtkPVSession::SafeDownCast(pm->GetActiveSession());
  if (!activeSession || !activeSession->IsMultiClients())
  {
    return;
  }

  assert(processType == vtkProcessModule::PROCESS_CLIENT ||
    processType == vtkProcessModule::PROCESS_SERVER);

  // Update decisions about lod-rendering and remote-rendering.
  if (processType == vtkProcessModule::PROCESS_CLIENT)
  {
    auto r_controller = activeSession->GetController(vtkPVSession::RENDER_SERVER_ROOT);
    assert(r_controller != nullptr);

    auto d_controller = activeSession->GetController(vtkPVSession::DATA_SERVER_ROOT);
    if (d_controller != r_controller)
    {
      vtkErrorMacro("RenderServer-DataServer configuration is not supported in "
                    "multi-clients mode. Please restart ParaView in the right mode. "
                    "Aborting since this could cause deadlocks and other issues.");
      abort();
    }

    vtkMultiProcessStream stream;
    stream << (this->UseLODForInteractiveRender ? 1 : 0)
           << (this->UseDistributedRenderingForRender ? 1 : 0)
           << (this->UseDistributedRenderingForLODRender ? 1 : 0) << this->StillRenderProcesses
           << this->InteractiveRenderProcesses;
    r_controller->Send(stream, 1, 42000);
  }
  else
  {
    vtkMultiProcessStream stream;
    // c_controller is nullptr on satellites.
    if (auto c_controller = activeSession->GetController(vtkPVSession::CLIENT))
    {
      c_controller->Receive(stream, 1, 42000);
    }
    if (auto p_controller = pm->GetGlobalController())
    {
      p_controller->Broadcast(stream, 0);
    }
    int arg1, arg2, arg3;
    stream >> arg1 >> arg2 >> arg3 >> this->StillRenderProcesses >>
      this->InteractiveRenderProcesses;
    this->UseLODForInteractiveRender = (arg1 == 1);
    this->UseDistributedRenderingForRender = (arg2 == 1);
    this->UseDistributedRenderingForLODRender = (arg3 == 1);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::Update()
{
  vtkVLogScopeF(PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: Update", this->GetLogName().c_str());

  vtkTimerLog::MarkStartEvent("RenderView::Update");

  // reset flags that representations set in REQUEST_UPDATE() pass.
  this->DistributedRenderingRequired = false;
  this->NonDistributedRenderingRequired = false;
  this->ForceDataDistributionMode = -1;

  // clear discrete interaction style state.
  this->DiscreteCameras = nullptr;
  this->PreviousDiscreteCameraIndex = -1;

  this->Superclass::Update();

  // Update camera zoom manipulators based on whether we have discrete position.
  vtkUpdateTrackballZoomManipulators(this->TwoDInteractorStyle, this->DiscreteCameras == nullptr);
  vtkUpdateTrackballZoomManipulators(this->ThreeDInteractorStyle, this->DiscreteCameras == nullptr);

  // After every update we can expect the representation geometries to change.
  // Thus we need to determine whether we are doing to remote-rendering or not,
  // use-lod or not, etc. All these decisions are made right here to avoid
  // making them during each render-call.

  // Check if any representation told us:
  // 1 needed ordered compositing
  // 2 needed render empty images
  this->NeedsOrderedCompositing = false;
  this->RenderEmptyImages = false;
  int num_reprs = this->ReplyInformationVector->GetNumberOfInformationObjects();
  for (int cc = 0; cc < num_reprs; cc++)
  {
    vtkInformation* info = this->ReplyInformationVector->GetInformationObject(cc);
    if (info->Has(NEED_ORDERED_COMPOSITING()) && (info->Get(NEED_ORDERED_COMPOSITING()) != 0))
    {
      this->NeedsOrderedCompositing = true;
    }
    else if (info->Has(RENDER_EMPTY_IMAGES()) && (info->Get(RENDER_EMPTY_IMAGES()) != 0))
    {
      this->RenderEmptyImages = true;
    }
  }

  // Gather information about geometry sizes from all representations.
  const vtkTypeUInt64 lsize = this->GetDeliveryManager()->GetVisibleDataSize(/*low_res*/ false);
  vtkTypeUInt64 gsize;
  this->AllReduce(lsize, gsize, vtkCommunicator::SUM_OP);
  const double geometry_size = gsize / 1024.0;

  // Update decisions about lod-rendering and remote-rendering.
  this->UseLODForInteractiveRender = this->ShouldUseLODRendering(geometry_size);
  this->UseDistributedRenderingForRender =
    this->ShouldUseDistributedRendering(geometry_size, /*using_lod=*/false);
  if (!this->UseLODForInteractiveRender)
  {
    this->UseDistributedRenderingForLODRender = this->UseDistributedRenderingForRender;
  }

  this->StillRenderProcesses = this->InteractiveRenderProcesses = vtkPVSession::CLIENT;
  bool in_tile_display_mode = this->InTileDisplayMode();
  bool in_cave_mode = this->InCaveDisplayMode();
  if (in_tile_display_mode || in_cave_mode || this->UseDistributedRenderingForRender)
  {
    this->StillRenderProcesses = vtkPVSession::CLIENT | vtkPVSession::RENDER_SERVER;
  }
  if (in_tile_display_mode || in_cave_mode || this->UseDistributedRenderingForLODRender)
  {
    this->InteractiveRenderProcesses = vtkPVSession::CLIENT | vtkPVSession::RENDER_SERVER;
  }

  // Synchronize data bounds.
  this->SynchronizeGeometryBounds();

  vtkTimerLog::MarkEndEvent("RenderView::Update");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::CopyViewUpdateOptions(vtkPVRenderView* otherView)
{
  this->NeedsOrderedCompositing = otherView->NeedsOrderedCompositing;
  this->RenderEmptyImages = otherView->RenderEmptyImages;
  this->UseLODForInteractiveRender = otherView->UseLODForInteractiveRender;
  this->UseDistributedRenderingForRender = otherView->UseDistributedRenderingForRender;
  this->StillRenderProcesses = otherView->StillRenderProcesses;
  this->InteractiveRenderProcesses = otherView->InteractiveRenderProcesses;
  this->UseDistributedRenderingForLODRender = otherView->UseDistributedRenderingForLODRender;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UpdateLOD()
{
  vtkVLogScopeF(PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: UpdateLOD", this->GetLogName().c_str());

  vtkTimerLog::MarkStartEvent("RenderView::UpdateLOD");

  // Update LOD geometry.

  this->RequestInformation->Set(LOD_RESOLUTION(), this->LODResolution);
  if (this->UseOutlineForLODRendering)
  {
    this->RequestInformation->Set(USE_OUTLINE_FOR_LOD(), 1);
  }

  // reset flags that representations set in REQUEST_UPDATE_LOD() pass.
  this->DistributedRenderingRequiredLOD = false;
  this->NonDistributedRenderingRequiredLOD = false;

  this->CallProcessViewRequest(
    vtkPVView::REQUEST_UPDATE_LOD(), this->RequestInformation, this->ReplyInformationVector);

  const vtkTypeUInt64 lsize = this->GetDeliveryManager()->GetVisibleDataSize(/*low_res*/ true);
  vtkTypeUInt64 gsize;
  this->AllReduce(lsize, gsize, vtkCommunicator::SUM_OP);
  const double geometry_size = gsize / 1024.0;

  this->UseDistributedRenderingForLODRender =
    this->ShouldUseDistributedRendering(geometry_size, /*using_lod=*/true);

  this->InteractiveRenderProcesses = vtkPVSession::CLIENT;
  bool in_tile_display_mode = this->InTileDisplayMode();
  bool in_cave_mode = this->InCaveDisplayMode();
  if (in_tile_display_mode || in_cave_mode || this->UseDistributedRenderingForLODRender)
  {
    this->InteractiveRenderProcesses = vtkPVSession::CLIENT | vtkPVSession::RENDER_SERVER;
  }

  vtkTimerLog::MarkEndEvent("RenderView::UpdateLOD");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::StillRender()
{
  vtkVLogScopeF(PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: StillRender", this->GetLogName().c_str());

  vtkTimerLog::MarkStartEvent("Still Render");
  this->GetRenderWindow()->SetDesiredUpdateRate(0.002);

  this->Internals->PreRender(this->RenderView);

  this->Render(false, this->SuppressRendering);

  vtkTimerLog::MarkEndEvent("Still Render");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::InteractiveRender()
{
  vtkVLogScopeF(
    PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: InteractiveRender", this->GetLogName().c_str());

  vtkTimerLog::MarkStartEvent("Interactive Render");
  this->GetRenderWindow()->SetDesiredUpdateRate(5.0);

  this->Internals->OSPRayCount = 0;
  this->Internals->PreRender(this->RenderView);

  this->Render(true, this->SuppressRendering);

  vtkTimerLog::MarkEndEvent("Interactive Render");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::Render(bool interactive, bool skip_rendering)
{
  // This gets called only the processes that are doing rendering i.e. it won't
  // be called on data server or if doing local rendering in client-server mode,
  // this won't be called on the remote processes.
  assert(
    this->GetLocalProcessDoesRendering(interactive ? this->GetUseDistributedRenderingForLODRender()
                                                   : this->GetUseDistributedRenderingForRender()));

  vtkVLogScopeF(PARAVIEW_LOG_RENDERING_VERBOSITY(), "Render(interactive=%s, skip_rendering=%s)",
    (interactive ? "true" : "false"), (skip_rendering ? "true" : "false"));

  this->UpdateStereoProperties();

  // Update background.
  this->UpdateBackground();

  auto rvsettings = vtkPVRenderViewSettings::GetInstance();
  this->GetRenderer()->SetTwoSidedLighting(rvsettings->GetTwoSidedLighting());

  if ((!interactive && this->UseDistributedRenderingForRender) ||
    (interactive && this->UseDistributedRenderingForLODRender))
  {
    // in multi-client modes, Render() will be called on client always. Now the
    // client need to coordinate with server only when we are remote rendering.
    // if Render() is called on server side, then we are indeed remote
    // rendering, irrespective of what the local flags tell us and we need to
    // coordinate with the client to update the local flags correctly.

    // Although Selection do trigger a Render on the server side and in such
    // case we MUST NOT execute that collaboration synchronization
    if (!this->MakingSelection)
    {
      this->SynchronizeForCollaboration();
    }
  }

  // BUG #13534. Reset the clip planes on every render. Since this does not
  // involve any communication, doing this on every render is not a big deal.
  this->ResetCameraClippingRange();

  if (this->DiscreteCameras != nullptr)
  {
    vtkCamera* camera = this->GetActiveCamera();
    int index = this->DiscreteCameras->FindClosestCamera(camera);
    if (interactive == false || this->PreviousDiscreteCameraIndex != index)
    {
      this->PreviousDiscreteCameraIndex = index;
      this->DiscreteCameras->UpdateCamera(index, camera);
    }
  }
  else
  {
    this->PreviousDiscreteCameraIndex = -1;
  }

  bool in_tile_display_mode = this->InTileDisplayMode();
  bool in_cave_mode = this->InCaveDisplayMode();
  if (in_cave_mode && !this->RemoteRenderingAvailable)
  {
    static bool warned_once = false;
    if (!warned_once)
    {
      vtkErrorMacro("In Cave mode and Display cannot be opened on server-side! "
                    "Ensure the environment is set correctly in the pvx file.");
      in_cave_mode = false;
    }
  }

  // Use loss-less image compression for client-server for full-res renders.
  this->SynchronizedRenderers->SetLossLessCompression(!interactive);

  bool use_lod_rendering = interactive ? this->GetUseLODForInteractiveRender() : false;
  if (use_lod_rendering)
  {
    this->RequestInformation->Set(USE_LOD(), 1);
  }

  // Decide if we are doing remote rendering or local rendering.
  bool use_distributed_rendering = use_lod_rendering
    ? this->GetUseDistributedRenderingForLODRender()
    : this->GetUseDistributedRenderingForRender();

  const bool use_ordered_compositing = this->GetUseOrderedCompositing();

  vtkTimerLog::FormatAndMarkEvent("Render (use_lod: %d), (use_distributed_rendering: %d), "
                                  "(use_ordered_compositing: %d)",
    use_lod_rendering, use_distributed_rendering, use_ordered_compositing);

  vtkVLogF(PARAVIEW_LOG_RENDERING_VERBOSITY(),
    "use_lod=%d, use_distributed_rendering=%d, use_ordered_compositing=%d", use_lod_rendering,
    use_distributed_rendering, use_ordered_compositing);

  auto deliveryManager =
    vtkPVRenderViewDataDeliveryManager::SafeDownCast(this->GetDeliveryManager());
  if (use_ordered_compositing)
  {
    vtkTimerLog::FormatAndMarkEvent("Using ordered compositing w/ data redistribution, if needed");
    vtkVLogScopeF(PARAVIEW_LOG_DATA_MOVEMENT_VERBOSITY(),
      "Using ordered compositing w/ data redistribution as needed");
    // Let the delivery manager redistribute data as it deems necessary.
    deliveryManager->RedistributeDataForOrderedCompositing(use_lod_rendering);

    // DeliveryManager will generate bounding boxes that help order the ranks
    // for rendering. Pass those to the SynchronizedRenderers instance.
    const auto& cuts = deliveryManager->GetCuts();
    auto controller = vtkMultiProcessController::GetGlobalController();
    assert(static_cast<int>(cuts.size()) == controller->GetNumberOfProcesses());
    this->OrderedCompositingHelper->SetBoundingBoxes(cuts);
    (void)controller;

    // tell `this->SynchronizedRenderers` who to order the ranks when doing
    // parallel rendering.
    this->SynchronizedRenderers->SetOrderedCompositingHelper(this->OrderedCompositingHelper);
    deliveryManager->SetUseRedistributedDataAsDeliveredData(true);
  }
  else
  {
    this->SynchronizedRenderers->SetOrderedCompositingHelper(nullptr);
    deliveryManager->SetUseRedistributedDataAsDeliveredData(false);
  }

  // enable render empty images if it was requested
  this->SynchronizedRenderers->SetRenderEmptyImages(this->GetRenderEmptyImages());

  // Render each representation with available geometry.
  // This is the pass where representations get an opportunity to get the
  // currently "available" represented data and try to render it.
  this->CallProcessViewRequest(
    vtkPVView::REQUEST_RENDER(), this->RequestInformation, this->ReplyInformationVector);

  // set the image reduction factor.
  this->SynchronizedRenderers->SetImageReductionFactor(
    (interactive ? this->InteractiveRenderImageReductionFactor
                 : this->StillRenderImageReductionFactor));

  this->UsedLODForLastRender = use_lod_rendering;

  if (skip_rendering)
  {
    // essential to restore state.
    return;
  }

  // When in tile-display mode, we are always doing shared rendering. However
  // when use_distributed_rendering we tell IceT that geometry is duplicated on
  // all processes.
  this->SynchronizedRenderers->SetEnabled(
    use_distributed_rendering || in_tile_display_mode || in_cave_mode);
  this->SynchronizedRenderers->SetDataReplicatedOnAllProcesses(
    in_cave_mode || (!use_distributed_rendering && in_tile_display_mode));

  if (this->UseHiddenLineRemoval && !use_distributed_rendering)
  {
    this->GetRenderer()->SetUseHiddenLineRemoval(true);
  }
  else
  { // Ignore for distributed rendering.
    this->GetRenderer()->SetUseHiddenLineRemoval(false);
  }

  // Configure FXAA. Disable for picking, as it mucks up the selection buffers.
  bool use_fxaa = this->UseFXAA && !this->MakingSelection;
  this->RenderView->GetRenderer()->SetUseFXAA(use_fxaa);
  this->RenderView->GetRenderer()->SetFXAAOptions(this->FXAAOptions);
  this->SynchronizedRenderers->SetUseFXAA(use_fxaa);
  this->SynchronizedRenderers->SetFXAAOptions(this->FXAAOptions);
  if (this->SynchronizedRenderers->GetEnabled())
  {
    // Force opaque rendering for the GridAxes. Needed so that the grid axes
    // labels are visible when not using ordered compositing (see bug #17472)
    if (this->GridAxes3DActor)
    {
      this->GridAxes3DActor->SetForceOpaque(true);
    }
  }
  this->OrientationWidget->GetRenderer()->SetUseFXAA(use_fxaa);
  this->OrientationWidget->GetRenderer()->SetFXAAOptions(this->FXAAOptions.Get());
  this->CameraOrientationWidget->GetDefaultRenderer()->SetUseFXAA(use_fxaa);
  this->CameraOrientationWidget->GetDefaultRenderer()->SetFXAAOptions(this->FXAAOptions.Get());

  // Configure SSAO
  this->RenderView->GetRenderer()->SetUseSSAO(this->UseSSAO);
  this->RenderView->GetRenderer()->SetSSAOKernelSize(this->KernelSize);
  this->RenderView->GetRenderer()->SetSSAOBlur(this->Blur);
  if (this->UseSSAODefaultPresets && this->GeometryBounds.IsValid())
  {
    constexpr double radius = 0.1;
    constexpr double bias = 0.001;
    this->RenderView->GetRenderer()->SetSSAORadius(
      radius * this->GeometryBounds.GetDiagonalLength());
    this->RenderView->GetRenderer()->SetSSAOBias(bias * this->GeometryBounds.GetDiagonalLength());
  }
  else
  {
    this->RenderView->GetRenderer()->SetSSAORadius(this->Radius);
    this->RenderView->GetRenderer()->SetSSAOBias(this->Bias);
  }

  if (this->ShowAnnotation)
  {
    std::ostringstream stream;
    stream << "Mode: " << (interactive ? "interactive" : "still") << "\n"
           << "Level-of-detail: " << (use_lod_rendering ? "yes" : "no") << "\n"
           << "Remote/parallel rendering: " << (use_distributed_rendering ? "yes" : "no") << "\n";
    this->Annotation->SetText(stream.str().c_str());
  }

  // Determine if local process is rendering data for the composited renderer.
  vtkPVRendererCuller* culler = vtkPVRendererCuller::SafeDownCast(this->Culler.GetPointer());
  culler->SetRenderOnLocalProcess(
    this->IsProcessRenderingGeometriesForCompositing(use_distributed_rendering));

  // Call Render(). Remember this method gets called only on processes doing the
  // rendering, so additional checks are needed here.
  this->AboutToRenderOnLocalProcess(interactive);
  if (!this->MakingSelection)
  {
    this->Timer->StartTimer();
  }
  this->GetRenderWindow()->Render();
  if (!this->MakingSelection)
  {
    this->Timer->StopTimer();
  }

  if (!this->MakingSelection)
  {
    // If we are making selection, then it's a multi-step render process and we
    // need to leave the SynchronizedRenderers enabled for
    // that entire process.
    this->SynchronizedRenderers->SetEnabled(false);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::Deliver(int use_lod, unsigned int size, unsigned int* representation_ids)
{
  // if in multi-clients mode, ensure that processes are in the same "state"
  // before doing the data delivery or we may end up with dead-locks due to
  // mismatched representations.
  if (!this->TestCollaborationCounter())
  {
    return;
  }

  // in multi-clients mode, for every Deliver() and Render() call, we obtain the
  // remote-rendering related ivars from the client.
  this->SynchronizeForCollaboration();

  this->Superclass::Deliver(use_lod, size, representation_ids);
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetDataDistributionMode(bool low_res)
{
  if (this->ForceDataDistributionMode >= 0)
  {
    // data-distribution mode is being overridden (experimental)
    return this->ForceDataDistributionMode;
  }

  const bool use_remote_rendering = low_res ? this->GetUseDistributedRenderingForLODRender()
                                            : this->GetUseDistributedRenderingForRender();

  bool in_tile_display_mode = this->InTileDisplayMode();
  bool in_cave_mode = this->InCaveDisplayMode();
  if (in_cave_mode)
  {
    return vtkMPIMoveData::CLONE;
  }

  if (use_remote_rendering)
  {
    return in_tile_display_mode ? vtkMPIMoveData::COLLECT_AND_PASS_THROUGH
                                : vtkMPIMoveData::PASS_THROUGH;
  }

  return in_tile_display_mode ? vtkMPIMoveData::CLONE : vtkMPIMoveData::COLLECT;
}

//----------------------------------------------------------------------------
vtkAlgorithmOutput* vtkPVRenderView::GetPieceProducer(
  vtkInformation* info, vtkPVDataRepresentation* repr, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return nullptr;
  }

  return view->GetDeliveryManager()->GetProducer(repr, false, port);
}

//----------------------------------------------------------------------------
vtkAlgorithmOutput* vtkPVRenderView::GetPieceProducerLOD(
  vtkInformation* info, vtkPVDataRepresentation* repr, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return nullptr;
  }

  return view->GetDeliveryManager()->GetProducer(repr, true, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRedistributionMode(
  vtkInformation* info, vtkPVDataRepresentation* repr, int mode, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetRedistributionMode(repr, mode, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRedistributionModeToSplitBoundaryCells(
  vtkInformation* info, vtkPVDataRepresentation* repr, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetRedistributionModeToSplitBoundaryCells(repr, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRedistributionModeToDuplicateBoundaryCells(
  vtkInformation* info, vtkPVDataRepresentation* repr, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetRedistributionModeToDuplicateBoundaryCells(repr, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRedistributionModeToUniquelyAssignBoundaryCells(
  vtkInformation* info, vtkPVDataRepresentation* repr, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetRedistributionModeToUniquelyAssignBoundaryCells(repr, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetStreamable(vtkInformation* info, vtkPVDataRepresentation* repr, bool val)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetStreamable(repr, val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrderedCompositingConfiguration(
  vtkInformation* info, vtkPVDataRepresentation* repr, int config, const double* bounds, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetOrderedCompositingConfiguration(repr, config, bounds, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetDeliverToAllProcesses(
  vtkInformation* info, vtkPVDataRepresentation* repr, bool clone)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetDeliverToAllProcesses(repr, clone, false);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetDeliverToClientAndRenderingProcesses(vtkInformation* info,
  vtkPVDataRepresentation* repr, bool deliver_to_client, bool gather_before_delivery, int port)
{
  vtkPVRenderView* view = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!view)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(view->GetDeliveryManager())
    ->SetDeliverToClientAndRenderingProcesses(
      repr, deliver_to_client, gather_before_delivery, false, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetGeometryBounds(vtkInformation* info, vtkPVDataRepresentation* repr,
  const double bounds[6], vtkMatrix4x4* matrix /*=nullptr*/, int port /*=0*/)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }
  vtkPVRenderViewDataDeliveryManager::SafeDownCast(self->GetDeliveryManager())
    ->SetGeometryBounds(repr, bounds, matrix, port);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetNextStreamedPiece(
  vtkInformation* info, vtkPVDataRepresentation* repr, vtkDataObject* piece)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }
  vtkStreamingStatusMacro(<< repr << " streamed piece of size: "
                          << (piece ? piece->GetActualMemorySize() : 0));
  vtkPVRenderViewDataDeliveryManager::SafeDownCast(self->GetDeliveryManager())
    ->SetNextStreamedPiece(repr, piece);
}

//----------------------------------------------------------------------------
vtkDataObject* vtkPVRenderView::GetCurrentStreamedPiece(
  vtkInformation* info, vtkPVDataRepresentation* repr)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return nullptr;
  }

  return vtkPVRenderViewDataDeliveryManager::SafeDownCast(self->GetDeliveryManager())
    ->GetCurrentStreamedPiece(repr);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRequiresDistributedRendering(
  vtkInformation* info, vtkPVDataRepresentation* vtkNotUsed(repr), bool value, bool for_lod)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  bool& nonDistributedRenderingRequired =
    for_lod ? self->NonDistributedRenderingRequiredLOD : self->NonDistributedRenderingRequired;

  bool& distributedRenderingRequired =
    for_lod ? self->DistributedRenderingRequiredLOD : self->DistributedRenderingRequired;

  if ((nonDistributedRenderingRequired == true && value == true) ||
    (distributedRenderingRequired == true && value == false))
  {
    vtkGenericWarningMacro("Conflicting distributed rendering requests. "
                           "Rendering may not work as expected.");
    return;
  }

  if (value)
  {
    distributedRenderingRequired = true;
  }
  else
  {
    nonDistributedRenderingRequired = true;
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetForceDataDistributionMode(vtkInformation* info, int flag)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }
  self->ForceDataDistributionMode = flag < 0 ? -1 : flag;
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::ShouldUseDistributedRendering(double geometry_size, bool using_lod)
{
  // both can never be true.
  assert((this->DistributedRenderingRequired && this->NonDistributedRenderingRequired) == false);
  assert(
    (this->DistributedRenderingRequiredLOD && this->NonDistributedRenderingRequiredLOD) == false);

  bool remote_rendering_available = this->GetRemoteRenderingAvailable();

  // First check if any representations explicitly told us to use either remote
  // or local render. In that case, we pick accordingly without taking
  // remote-rendering thresholds into consideration (BUG #0013749).
  const bool& distributedRenderingRequired =
    using_lod ? this->DistributedRenderingRequiredLOD : this->DistributedRenderingRequired;
  const bool& nonDistributedRenderingRequired =
    using_lod ? this->NonDistributedRenderingRequiredLOD : this->NonDistributedRenderingRequired;

  try
  {
    if (distributedRenderingRequired == true && remote_rendering_available == false)
    {
      vtkErrorMacro("Some of the representations in this view require remote rendering "
                    "which, however, is not available. Rendering may not work as "
                    "expected.");
    }
    else if (distributedRenderingRequired || nonDistributedRenderingRequired)
    {
      // implies that at least a representation requested a specific mode.
      throw(distributedRenderingRequired ? true : false);
    }

    if (remote_rendering_available == false)
    {
      throw false;
    }

    if (vtkProcessModule::GetProcessType() == vtkProcessModule::PROCESS_BATCH)
    {
      // currently, we only support parallel rendering in batch mode.
      throw true;
    }

    throw(this->RemoteRenderingThreshold <= geometry_size);
  }
  catch (bool val)
  {
    //----------------------------------------------------------------------------
    // This helps us further condition the "ShouldUseDistributedRendering"
    // response based on whether distributed rendering makes sense in the
    // current configuration e.g. it doesn't make sense in builtin mode, or
    // in batch mode with 1 process.
    //----------------------------------------------------------------------------
    if (val)
    {
      // distributed rendering is requested. ensure that we're running in a
      // mode where distributed rendering has any effect i.e client-server
      // or parallel batch.
      auto pm = vtkProcessModule::GetProcessModule();
      switch (pm->GetProcessType())
      {
        case vtkProcessModule::PROCESS_BATCH:
          return (pm->GetNumberOfLocalPartitions() > 1);

        case vtkProcessModule::PROCESS_CLIENT:
          // this is a remote session.
          return (this->GetSession()->GetController(vtkPVSession::RENDER_SERVER_ROOT) != nullptr);

        default:
          break;
      }
    }
    return val;
  }
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::ShouldUseLODRendering(double geometry_size)
{
  // return false;
  return this->LODRenderingThreshold <= geometry_size;
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::IsProcessRenderingGeometriesForCompositing(bool using_distributed_rendering)
{
  auto pm = vtkProcessModule::GetProcessModule();
  const auto processType = pm->GetProcessType();
  if (processType == vtkProcessModule::PROCESS_DATA_SERVER)
  {
    return false;
  }

  if (this->InTileDisplayMode() || this->InCaveDisplayMode())
  {
    return true;
  }

  if (using_distributed_rendering)
  {
    // using distributed rendering.
    return (processType != vtkProcessModule::PROCESS_CLIENT);
  }
  else
  {
    // **not** using distributed rendering.
    if ((processType == vtkProcessModule::PROCESS_CLIENT) ||
      (processType == vtkProcessModule::PROCESS_BATCH && pm->GetPartitionId() == 0))
    {
      return true;
    }
  }
  return false;
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetUseOrderedCompositing()
{
  if (this->InCaveDisplayMode())
  {
    return false;
  }

  if (!this->NeedsOrderedCompositing)
  {
    return false;
  }

  if (this->ForceDataDistributionMode >= 0 &&
    this->ForceDataDistributionMode != vtkMPIMoveData::PASS_THROUGH)
  {
    // for any mode where data is getting collected or cloned, we assume
    // ordered compositing is not needed.
    return false;
  }

  switch (vtkProcessModule::GetProcessType())
  {
    case vtkProcessModule::PROCESS_SERVER:
    case vtkProcessModule::PROCESS_BATCH:
    case vtkProcessModule::PROCESS_RENDER_SERVER:
      if (vtkProcessModule::GetProcessModule()->GetNumberOfLocalPartitions() > 1 ||
        this->InTileDisplayMode())
      {
        // in tile display mode, we need ordered compositing as
        // vtkIceTCompositePass uses that as indicator to not use z buffer.
        return true;
      }
      VTK_FALLTHROUGH;
    default:
      return false;
  }
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetRenderEmptyImages()
{
  int ptype = vtkProcessModule::GetProcessType();
  if (this->RenderEmptyImages &&
    ((ptype == vtkProcessModule::PROCESS_SERVER) || (ptype == vtkProcessModule::PROCESS_BATCH) ||
      (ptype == vtkProcessModule::PROCESS_RENDER_SERVER)) &&
    (vtkProcessModule::GetProcessModule()->GetNumberOfLocalPartitions() > 1))
  {
    return true;
  }
  return false;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAARelativeContrastThreshold(double val)
{
  this->FXAAOptions->SetRelativeContrastThreshold(static_cast<float>(val));
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAAHardContrastThreshold(double val)
{
  this->FXAAOptions->SetHardContrastThreshold(static_cast<float>(val));
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAASubpixelBlendLimit(double val)
{
  this->FXAAOptions->SetSubpixelBlendLimit(static_cast<float>(val));
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAASubpixelContrastThreshold(double val)
{
  this->FXAAOptions->SetSubpixelContrastThreshold(static_cast<float>(val));
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAAUseHighQualityEndpoints(bool val)
{
  this->FXAAOptions->SetUseHighQualityEndpoints(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFXAAEndpointSearchIterations(int val)
{
  this->FXAAOptions->SetEndpointSearchIterations(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetUseLightKit(bool use)
{
  if (this->UseLightKit != use)
  {
    if (use)
    {
      this->LightKit->AddLightsToRenderer(this->GetRenderer());
    }
    else
    {
      this->LightKit->RemoveLightsFromRenderer(this->GetRenderer());
    }
    this->UseLightKit = use;
    this->Modified();
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UpdateCenterAxes()
{
  vtkBoundingBox bbox(this->GeometryBounds);

  // include the center of rotation in the axes size determination.
  bbox.AddPoint(this->CenterAxes->GetPosition());

  double widths[3];
  bbox.GetLengths(widths);

  // lets make some thickness in all directions
  double diameterOverTen = bbox.GetMaxLength() > 0 ? bbox.GetMaxLength() / 10.0 : 1.0;
  widths[0] = widths[0] < diameterOverTen ? diameterOverTen : widths[0];
  widths[1] = widths[1] < diameterOverTen ? diameterOverTen : widths[1];
  widths[2] = widths[2] < diameterOverTen ? diameterOverTen : widths[2];

  widths[0] *= 0.25;
  widths[1] *= 0.25;
  widths[2] *= 0.25;
  this->CenterAxes->SetScale(widths);

  double bounds[6];
  this->GeometryBounds.GetBounds(bounds);
  if (this->GridAxes3DActor)
  {
    this->GridAxes3DActor->SetTransformedBounds(bounds);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::StreamingUpdate(const double view_planes[24])
{
  vtkVLogScopeF(
    PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: StreamingUpdate", this->GetLogName().c_str());

  vtkTimerLog::MarkStartEvent("vtkPVRenderView::StreamingUpdate");

  // Provide information about the view planes to the representations.
  // Representations are free to ignore them.
  this->RequestInformation->Set(
    vtkPVRenderView::VIEW_PLANES(), const_cast<double*>(view_planes), 24);

  // Now call REQUEST_STREAMING_UPDATE() on all representations. Most
  // representations simply ignore it, but those that support streaming
  // update the pipeline to get the "next phase" of the data from the input
  // pipeline.
  this->CallProcessViewRequest(vtkPVRenderView::REQUEST_STREAMING_UPDATE(),
    this->RequestInformation, this->ReplyInformationVector);

  vtkTimerLog::MarkEndEvent("vtkPVRenderView::StreamingUpdate");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::DeliverStreamedPieces(unsigned int size, unsigned int* representation_ids)
{
  vtkVLogScopeF(
    PARAVIEW_LOG_RENDERING_VERBOSITY(), "%s: DeliverStreamedPieces", this->GetLogName().c_str());

  // the plan now is to fetch the piece and then simply give it to the
  // representation as "next piece". Representation can decide what to do with
  // it, including adding to the existing datastructure.
  vtkTimerLog::MarkStartEvent("vtkPVRenderView::DeliverStreamedPieces");
  vtkPVRenderViewDataDeliveryManager::SafeDownCast(this->GetDeliveryManager())
    ->DeliverStreamedPieces(size, representation_ids);

  if (this->GetLocalProcessDoesRendering(this->GetUseDistributedRenderingForRender()))
  {
    // tell representations to "deal with" the newly streamed piece on the
    // rendering nodes.
    this->CallProcessViewRequest(vtkPVRenderView::REQUEST_PROCESS_STREAMED_PIECE(),
      this->RequestInformation, this->ReplyInformationVector);
  }

  vtkPVRenderViewDataDeliveryManager::SafeDownCast(this->GetDeliveryManager())
    ->ClearStreamedPieces();
  //                          ^--- the most dubious part of this code.

  vtkTimerLog::MarkEndEvent("vtkPVRenderView::DeliverStreamedPieces");
}

//----------------------------------------------------------------------------
void vtkPVRenderView::PrintSelf(ostream& os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
  os << indent << "UseLightKit: " << this->UseLightKit << endl;
  os << indent << "SuppressRendering: " << this->SuppressRendering << endl;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::ConfigureCompressor(const char* configuration)
{
  this->SynchronizedRenderers->ConfigureCompressor(configuration);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::InvalidateCachedSelection()
{
  this->Selector->InvalidateCachedSelection();
}

//*****************************************************************
// Forwarded to orientation axes widget.

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesInteractivity(bool v)
{
  this->OrientationWidget->SetEnabled(v);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesVisibility(bool v)
{
  this->OrientationWidget->SetVisibility(v);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesLabelColor(double r, double g, double b)
{
  this->OrientationWidget->SetAxisLabelColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesOutlineColor(double r, double g, double b)
{
  this->OrientationWidget->SetOutlineColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesXColor(double r, double g, double b)
{
  this->OrientationWidget->SetXAxisColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesYColor(double r, double g, double b)
{
  this->OrientationWidget->SetYAxisColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesZColor(double r, double g, double b)
{
  this->OrientationWidget->SetZAxisColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesXVisibility(bool vis)
{
  this->OrientationWidget->SetXAxisVisibility(vis);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesYVisibility(bool vis)
{
  this->OrientationWidget->SetYAxisVisibility(vis);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesZVisibility(bool vis)
{
  this->OrientationWidget->SetZAxisVisibility(vis);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesXLabelText(const char* text)
{
  this->OrientationWidget->SetXAxisLabelText(text);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesYLabelText(const char* text)
{
  this->OrientationWidget->SetYAxisLabelText(text);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOrientationAxesZLabelText(const char* text)
{
  this->OrientationWidget->SetZAxisLabelText(text);
}

//*****************************************************************
// Forwarded to camera orientation widget.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetCameraOrientationWidgetVisibility(bool visible)
{
  this->CameraOrientationWidget->GetRepresentation()->SetVisibility(visible);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCameraOrientationWidgetSize(int size)
{
  auto rep = vtkCameraOrientationRepresentation::SafeDownCast(
    this->CameraOrientationWidget->GetRepresentation());
  rep->SetSize(size, size);
  this->CameraOrientationWidget->SquareResize();
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCameraOrientationWidgetPadding(int padding[2])
{
  auto rep = vtkCameraOrientationRepresentation::SafeDownCast(
    this->CameraOrientationWidget->GetRepresentation());
  rep->SetPadding(padding);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCameraOrientationWidgetAnchor(int anchor)
{
  auto rep = vtkCameraOrientationRepresentation::SafeDownCast(
    this->CameraOrientationWidget->GetRepresentation());
  if (anchor >= 0 && anchor <= 3)
  {
    auto corner = static_cast<vtkCameraOrientationRepresentation::AnchorType>(anchor);
    switch (corner)
    {
      case vtkCameraOrientationRepresentation::AnchorType::LowerLeft:
        rep->AnchorToLowerLeft();
        break;
      case vtkCameraOrientationRepresentation::AnchorType::UpperLeft:
        rep->AnchorToUpperLeft();
        break;
      case vtkCameraOrientationRepresentation::AnchorType::LowerRight:
        rep->AnchorToLowerRight();
        break;
      case vtkCameraOrientationRepresentation::AnchorType::UpperRight:
        rep->AnchorToUpperRight();
        break;
      default:
        break;
    }
  }
  this->CameraOrientationWidget->SquareResize();
}

//*****************************************************************
// Forwarded to center axes.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetCenterAxesVisibility(bool v)
{
  this->CenterAxes->SetVisibility(v);
}

//*****************************************************************
// Forward to vtkPVInteractorStyle instances.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetCenterOfRotation(double x, double y, double z)
{
  this->CenterAxes->SetPosition(x, y, z);
  if (this->TwoDInteractorStyle)
  {
    this->TwoDInteractorStyle->SetCenterOfRotation(x, y, z);
  }
  if (this->ThreeDInteractorStyle)
  {
    this->ThreeDInteractorStyle->SetCenterOfRotation(x, y, z);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRotationFactor(double factor)
{
  if (this->TwoDInteractorStyle)
  {
    this->TwoDInteractorStyle->SetRotationFactor(factor);
  }
  if (this->ThreeDInteractorStyle)
  {
    this->ThreeDInteractorStyle->SetRotationFactor(factor);
  }
}

//*****************************************************************
// Forward to vtkLightKit.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyLightWarmth(double val)
{
  this->LightKit->SetKeyLightWarmth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyLightIntensity(double val)
{
  this->LightKit->SetKeyLightIntensity(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyLightElevation(double val)
{
  this->LightKit->SetKeyLightElevation(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyLightAzimuth(double val)
{
  this->LightKit->SetKeyLightAzimuth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFillLightWarmth(double val)
{
  this->LightKit->SetFillLightWarmth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyToFillRatio(double val)
{
  this->LightKit->SetKeyToFillRatio(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFillLightElevation(double val)
{
  this->LightKit->SetFillLightElevation(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetFillLightAzimuth(double val)
{
  this->LightKit->SetFillLightAzimuth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackLightWarmth(double val)
{
  this->LightKit->SetBackLightWarmth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyToBackRatio(double val)
{
  this->LightKit->SetKeyToBackRatio(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackLightElevation(double val)
{
  this->LightKit->SetBackLightElevation(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackLightAzimuth(double val)
{
  this->LightKit->SetBackLightAzimuth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetHeadLightWarmth(double val)
{
  this->LightKit->SetHeadLightWarmth(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetKeyToHeadRatio(double val)
{
  this->LightKit->SetKeyToHeadRatio(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetMaintainLuminance(int val)
{
  this->LightKit->SetMaintainLuminance(val);
}

//*****************************************************************
// Forward to vtkPVImageProcessingPasses instance
//----------------------------------------------------------------------------
void vtkPVRenderView::SetUseToneMapping(bool useToneMapping)
{
  if (useToneMapping && this->SynchronizedRenderers->GetImageProcessingPass() == nullptr)
  {
    this->SynchronizedRenderers->SetImageProcessingPass(this->Internals->ToneMappingPass);
  }
  else if (this->SynchronizedRenderers->GetImageProcessingPass() ==
    this->Internals->ToneMappingPass)
  {
    this->SynchronizedRenderers->SetImageProcessingPass(nullptr);
  }
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetToneMappingType(int toneMappingType)
{
  this->Internals->ToneMappingPass->SetToneMappingType(toneMappingType);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetExposure(double exposure)
{
  this->Internals->ToneMappingPass->SetExposure(exposure);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetContrast(double contrast)
{
  this->Internals->ToneMappingPass->SetContrast(contrast);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetShoulder(double shoulder)
{
  this->Internals->ToneMappingPass->SetShoulder(shoulder);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetMidIn(double midIn)
{
  this->Internals->ToneMappingPass->SetMidIn(midIn);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetMidOut(double midOut)
{
  this->Internals->ToneMappingPass->SetMidOut(midOut);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetHdrMax(double hdrMax)
{
  this->Internals->ToneMappingPass->SetHdrMax(hdrMax);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetUseACES(bool useACES)
{
  this->Internals->ToneMappingPass->SetUseACES(useACES);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetGenericFilmicPresets(int type)
{
  if (this->Internals->ToneMappingPass->GetToneMappingType() == vtkToneMappingPass::GenericFilmic)
  {
    if (type == Default)
    {
      this->Internals->ToneMappingPass->SetGenericFilmicDefaultPresets();
    }
    else if (type == Uncharted2)
    {
      this->Internals->ToneMappingPass->SetGenericFilmicUncharted2Presets();
    }
  }
}

//*****************************************************************
// Forward to 3D renderer.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetUseDepthPeeling(int val)
{
  this->GetRenderer()->SetUseDepthPeeling(val);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetUseDepthPeelingForVolumes(bool val)
{
  this->GetRenderer()->SetUseDepthPeelingForVolumes(val);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetMaximumNumberOfPeels(int val)
{
  this->GetRenderer()->SetMaximumNumberOfPeels(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UpdateBackground(vtkRenderer* renderer /*=nullptr*/)
{
  renderer = renderer ? renderer : this->GetRenderer();

  double color[3], color2[3];
  int mode = this->BackgroundColorMode;
  this->GetBackground(color);
  this->GetBackground2(color2);

  if (this->UseRenderViewSettingsForBackground)
  {
    auto settings = vtkPVRenderViewSettings::GetInstance();
    mode = settings->GetBackgroundColorMode();
    settings->GetBackgroundColor(color);
    settings->GetBackground2Color(color2);
  }

  switch (mode)
  {
    case DEFAULT:
      renderer->SetTexturedBackground(false);
      renderer->SetGradientBackground(false);
      renderer->SetUseImageBasedLighting(this->UseTexturedEnvironmentalBG);
      break;

    case GRADIENT:
      renderer->SetTexturedBackground(false);
      renderer->SetGradientBackground(true);
      renderer->SetUseImageBasedLighting(false);
      break;

    case IMAGE:
      renderer->SetTexturedBackground(true);
      renderer->SetGradientBackground(false);
      renderer->SetUseImageBasedLighting(this->UseEnvironmentLighting);
      break;

    case SKYBOX:
      renderer->SetTexturedBackground(false);
      renderer->SetGradientBackground(false);
      renderer->SetUseImageBasedLighting(this->UseEnvironmentLighting);
      break;

    case STEREO_SKYBOX:
      renderer->SetTexturedBackground(false);
      renderer->SetGradientBackground(false);
      renderer->SetUseImageBasedLighting(this->UseEnvironmentLighting);
      break;

    default:
      break;
  }

  renderer->SetBackground(color);
  renderer->SetBackground2(color2);

  // update skybox texture.
  vtkTexture* texture = renderer->GetBackgroundTexture();
  if ((this->BackgroundColorMode == vtkPVRenderView::STEREO_SKYBOX ||
        this->BackgroundColorMode == vtkPVRenderView::SKYBOX) &&
    texture != nullptr)
  {
    this->ConfigureTexture(texture);

    this->Skybox->SetProjection(this->BackgroundColorMode == vtkPVRenderView::SKYBOX
        ? vtkSkybox::Sphere
        : vtkSkybox::StereoSphere);
    // Update skybox orientation from renderer orientation
    double* up = renderer->GetEnvironmentUp();
    double* right = renderer->GetEnvironmentRight();
    double front[3];
    vtkMath::Cross(right, up, front);
    this->Skybox->SetFloorRight(front[0], front[1], front[2]);

    this->Skybox->SetTexture(texture);
    this->Skybox->SetVisibility(1);
    renderer->SetEnvironmentTexture(texture);
  }
  else
  {
    this->Skybox->SetVisibility(0);
    renderer->SetEnvironmentTexture(this->EnvironmentalBGTexture);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackgroundTexture(vtkTexture* texture)
{
  this->GetRenderer()->SetBackgroundTexture(texture);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::ConfigureTexture(vtkTexture* texture)
{
  if (texture != nullptr)
  {
    // environment texture is always declared in linear color space
    vtkImageData* input = texture->GetInput();
    if (input)
    {
      texture->Update();
      texture->SetUseSRGBColorSpace(input->GetScalarType() == VTK_UNSIGNED_CHAR);

      // mip map is required for correct IBL generation
      texture->MipmapOn();
      texture->InterpolateOn();
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetupAndSetRenderer(vtkRenderer* ren)
{
  // XXX We can consider to redesign the class in the future
  // to find a cleaner way to change the renderer.
  // All the following settings corresponds to those made on
  // the initial renderer in the constructor.
  ren->GetActiveCamera()->ParallelProjectionOff();
  ren->SetUseDepthPeeling(1);
  ren->SetUseDepthPeelingForVolumes(1);
  ren->SetAutomaticLightCreation(0);

  ren->AddCuller(this->Culler);
  ren->AddActor(this->CenterAxes);
  ren->AddActor(this->Skybox);

  vtkMemberFunctionCommand<vtkPVRenderView>* observer =
    vtkMemberFunctionCommand<vtkPVRenderView>::New();
  observer->SetCallback(*this, &vtkPVRenderView::ResetCameraClippingRange);
  ren->AddObserver(vtkCommand::ResetCameraClippingRangeEvent, observer);
  observer->FastDelete();

  this->RenderView->SetRenderer(ren);
  this->SynchronizedRenderers->SetRenderer(ren);
  this->CameraOrientationWidget->SetParentRenderer(ren);
  this->OrientationWidget->SetParentRenderer(ren);
  this->NonCompositedRenderer->SetActiveCamera(ren->GetActiveCamera());
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackgroundMode(int val)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetBackgroundMode(
    static_cast<vtkOSPRayRendererNode::BackgroundMode>(val), ren);
#else
  (void)val;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetEnvironmentalBG(double r, double g, double b)
{
  this->GetRenderer()->SetEnvironmentalBG(r, g, b);
}
//----------------------------------------------------------------------------
void vtkPVRenderView::SetEnvironmentalBG2(double r, double g, double b)
{
  this->GetRenderer()->SetEnvironmentalBG2(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetEnvironmentalBGTexture(vtkTexture* texture)
{
  this->ConfigureTexture(texture);
  this->EnvironmentalBGTexture = texture;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetGradientEnvironmentalBG(int val)
{
  this->GetRenderer()->SetGradientEnvironmentalBG(val ? true : false);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetTexturedEnvironmentalBG(int val)
{
  this->UseTexturedEnvironmentalBG = (val ? true : false);
}

//*****************************************************************
// Entry point for dynamic lights
//----------------------------------------------------------------------------
//----------------------------------------------------------------------------
void vtkPVRenderView::AddLight(vtkLight* newLight)
{
  this->GetRenderer()->AddLight(newLight);
}
void vtkPVRenderView::RemoveLight(vtkLight* oldLight)
{
  this->GetRenderer()->RemoveLight(oldLight);
}

//*****************************************************************
// Forward to vtkRenderWindow.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetStereoCapableWindow(int val)
{
  if (this->GetRenderWindow()->GetStereoCapableWindow() != val)
  {
    this->GetRenderWindow()->SetStereoCapableWindow(val);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetStereoRender(int val)
{
  this->GetRenderWindow()->SetStereoRender(val);
}

//----------------------------------------------------------------------------
inline int vtkGetNumberOfRendersPerFrame(int stereoMode)
{
  switch (stereoMode)
  {
    case VTK_STEREO_CRYSTAL_EYES:
    case VTK_STEREO_RED_BLUE:
    case VTK_STEREO_INTERLACED:
    case VTK_STEREO_DRESDEN:
    case VTK_STEREO_ANAGLYPH:
    case VTK_STEREO_CHECKERBOARD:
    case VTK_STEREO_SPLITVIEWPORT_HORIZONTAL:
    case VTK_STEREO_FAKE:
    case VTK_STEREO_EMULATE:
    case VTK_STEREO_ZSPACE_INSPIRE:
      return 2;

    case VTK_STEREO_LEFT:
    case VTK_STEREO_RIGHT:
    default:
      return 1;
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UpdateStereoProperties()
{
  if (!this->GetRenderWindow()->GetStereoRender())
  {
    return;
  }

  // VTK_STEREO_FAKE got added to the XML config as the value for `None`. Let's
  // switch to simply rendering LEFT eye in that mode, since we don't really
  // need two passes.
  if (this->StereoType == VTK_STEREO_FAKE)
  {
    this->StereoType = VTK_STEREO_LEFT;
  }
  if (this->ServerStereoType == VTK_STEREO_FAKE)
  {
    this->ServerStereoType = VTK_STEREO_LEFT;
  }

  int client_type = this->StereoType;
  int server_type = (this->ServerStereoType == VTK_STEREOTYPE_SAME_AS_CLIENT)
    ? client_type
    : this->ServerStereoType;

  if ((this->InTileDisplayMode() || this->InCaveDisplayMode()) && !this->GetInCaptureScreenshot())
  {
    // in this mode, the render server processes are showing results to the user
    // and the stereo mode is more relevant on the server side than the client
    // side since the client is merely a driver.
    if (vtkGetNumberOfRendersPerFrame(server_type) != vtkGetNumberOfRendersPerFrame(client_type))
    {
      if (vtkGetNumberOfRendersPerFrame(server_type) == 2)
      {
        client_type = VTK_STEREO_EMULATE;
      }
      else
      {
        client_type = server_type;
      }
    }
  }
  else
  {
    // the client is the main viewport for the user, the server side processes
    // are not showing final results to the user. The server never needs any 2
    // pass mode except VTK_STEREO_EMULATE.
    if (vtkGetNumberOfRendersPerFrame(client_type) == 2)
    {
      server_type = VTK_STEREO_EMULATE;
    }
    else
    {
      server_type = client_type;
    }
  }

  if (this->StereoType != client_type)
  {
    vtkWarningMacro("Incompatible stereo types for client and server ranks. "
                    "Forcing the client to use '"
      << vtkRenderWindow::GetStereoTypeAsString(client_type) << "'.");
    this->StereoType = client_type;
  }

  if (this->ServerStereoType != server_type)
  {
    // we don't warn here since this only happens in modes where the server
    // not showing final results to the user.
    this->ServerStereoType = server_type;
  }

  // by this point, the ServerStereoType should have been updated to be a type
  // VTK knows about.
  assert(this->ServerStereoType != VTK_STEREOTYPE_SAME_AS_CLIENT);

  switch (vtkProcessModule::GetProcessType())
  {
    case vtkProcessModule::PROCESS_RENDER_SERVER:
    case vtkProcessModule::PROCESS_SERVER:
      this->GetRenderWindow()->SetStereoType(this->ServerStereoType);
      break;

    default:
      this->GetRenderWindow()->SetStereoType(this->StereoType);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetMultiSamples(int val)
{
  this->GetRenderWindow()->SetMultiSamples(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetAlphaBitPlanes(int val)
{
  this->GetRenderWindow()->SetAlphaBitPlanes(val);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetStencilCapable(int val)
{
  this->GetRenderWindow()->SetStencilCapable(val);
}

//*****************************************************************
// Forwarded to vtkCamera if present on local processes.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetParallelProjection(int mode)
{
  if (this->ParallelProjection != mode)
  {
    this->ParallelProjection = mode;
    this->GetActiveCamera()->SetParallelProjection(mode);
    this->Modified();
  }
}

//*****************************************************************
// Forwarded to vtkPVInteractorStyle if present on local processes.
//----------------------------------------------------------------------------
void vtkPVRenderView::SetCamera2DManipulators(const int manipulators[9])
{
  this->SetCameraManipulators(this->TwoDInteractorStyle, manipulators);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCamera3DManipulators(const int manipulators[9])
{
  this->SetCameraManipulators(this->ThreeDInteractorStyle, manipulators);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCameraManipulators(vtkPVInteractorStyle* style, const int manipulators[9])
{
  if (!style)
  {
    return;
  }

  style->RemoveAllManipulators();
  enum
  {
    NONE = 0,
    SHIFT = 1,
    CTRL = 2
  };

  enum
  {
    PAN = 1,
    ZOOM = 2,
    ROLL = 3,
    ROTATE = 4,
    MULTI_ROTATE = 5,
    ZOOM_TO_MOUSE = 6,
    SKYBOX_ROTATE = 7
  };

  for (int manip = NONE; manip <= CTRL; manip++)
  {
    for (int button = 0; button < 3; button++)
    {
      int manipType = manipulators[3 * manip + button];
      vtkSmartPointer<vtkCameraManipulator> cameraManipulator;
      switch (manipType)
      {
        case PAN:
          cameraManipulator = vtkSmartPointer<vtkTrackballPan>::New();
          break;
        case ZOOM:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballZoom>::New();
          break;
        case ROLL:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballRoll>::New();
          break;
        case ROTATE:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballRotate>::New();
          break;
        case MULTI_ROTATE:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballMultiRotate>::New();
          break;
        case ZOOM_TO_MOUSE:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballZoomToMouse>::New();
          break;
        case SKYBOX_ROTATE:
          cameraManipulator = vtkSmartPointer<vtkPVTrackballEnvironmentRotate>::New();
          break;
      }
      if (cameraManipulator)
      {
        cameraManipulator->SetButton(button + 1); // since button starts with 1.
        cameraManipulator->SetControl(manip == CTRL ? 1 : 0);
        cameraManipulator->SetShift(manip == SHIFT ? 1 : 0);
        style->AddManipulator(cameraManipulator);
      }
    }
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetReverseMouseWheelZoomDirection(bool reverse)
{
  this->ReverseMouseWheelZoomDirection = reverse;

  // Always give positive factors to the SetXXXMotionFactor functions
  if (this->TwoDInteractorStyle)
  {
    double factor = this->TwoDInteractorStyle->GetMouseWheelMotionFactor();
    this->SetCamera2DMouseWheelMotionFactor(factor < 0 ? -factor : factor);
  }
  if (this->ThreeDInteractorStyle)
  {
    double factor = this->ThreeDInteractorStyle->GetMouseWheelMotionFactor();
    this->SetCamera3DMouseWheelMotionFactor(factor < 0 ? -factor : factor);
  }
}

void vtkPVRenderView::SetMouseWheelZoomsToCursor(bool value)
{
  if (this->TwoDInteractorStyle)
  {
    this->TwoDInteractorStyle->SetMouseWheelZoomsToCursor(value);
  }
  if (this->ThreeDInteractorStyle)
  {
    this->ThreeDInteractorStyle->SetMouseWheelZoomsToCursor(value);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCamera2DMouseWheelMotionFactor(double factor)
{
  factor *= this->ReverseMouseWheelZoomDirection ? -1 : 1;
  if (this->TwoDInteractorStyle)
  {
    this->TwoDInteractorStyle->SetMouseWheelMotionFactor(factor);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetCamera3DMouseWheelMotionFactor(double factor)
{
  factor *= this->ReverseMouseWheelZoomDirection ? -1 : 1;
  if (this->ThreeDInteractorStyle)
  {
    this->ThreeDInteractorStyle->SetMouseWheelMotionFactor(factor);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetShowAnnotation(bool val)
{
  this->ShowAnnotation = val;
  this->Annotation->SetVisibility(val ? 1 : 0);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetAnnotationColor(double r, double g, double b)
{
  this->Annotation->GetTextActor()->GetTextProperty()->SetColor(r, g, b);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::UpdateAnnotationText()
{
  if (this->UpdateAnnotation && this->ShowAnnotation && !this->MakingSelection)
  {
    std::ostringstream stream;
    stream << this->Annotation->GetText();
    this->BuildAnnotationText(stream);
    this->Annotation->SetText(stream.str().c_str());
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetSize(int dx, int dy)
{
  if (this->Size[0] != dx || this->Size[1] != dy)
  {
    this->InvalidateCachedSelection();
  }
  this->Superclass::SetSize(dx, dy);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetPosition(int x, int y)
{
  if (this->Position[0] != x || this->Position[1] != y)
  {
    this->InvalidateCachedSelection();
  }
  this->Superclass::SetPosition(x, y);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::BuildAnnotationText(ostream& str)
{
  this->Timer->StopTimer();
  double time = this->Timer->GetElapsedTime();
  str << "Frame rate (approx): " << (time > 0.0 ? 1.0 / time : 100000.0) << " fps\n";
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::BeginValuePassForRendering(
  int fieldAssociation, const char* arrayName, int component)
{
  // TODO: validate session configuration is supported.
  auto& internals = (*this->Internals);
  if (internals.ValuePassState)
  {
    vtkErrorMacro("Nested call to 'BeginValuePassForRendering'!");
    return false;
  }

  if (!arrayName)
  {
    vtkErrorMacro("'arrayName' cannot be nullptr!");
    return false;
  }

  // in our infinite wisdom, we choose to use a different field association flag
  // for vtkValuePass, so handle it.
  int valuePassAssociation = 0;
  switch (fieldAssociation)
  {
    case vtkDataObject::CELL:
      valuePassAssociation = VTK_SCALAR_MODE_USE_CELL_FIELD_DATA;
      break;

    case vtkDataObject::POINT:
      valuePassAssociation = VTK_SCALAR_MODE_USE_POINT_FIELD_DATA;
      break;
    default:
      vtkErrorMacro("Field association currently not supported: "
        << vtkDataObject::GetAssociationTypeAsString(fieldAssociation));
      return false;
  }

  internals.ValuePasses->SetInputArrayToProcess(valuePassAssociation, arrayName);
  internals.ValuePasses->SetInputComponentToProcess(component);

  // hide various annotations since they interfere with value pass;
  // preserve state so we can store it.
  internals.ValuePassState.reset(new ValuePassStateT());
  internals.ValuePassState->CameraOrientationWidgetVisibility =
    this->CameraOrientationWidget->GetRepresentation()->GetVisibility();
  internals.ValuePassState->OrientationAxesVisibility = this->OrientationWidget->GetVisibility();
  internals.ValuePassState->CenterAxesVisibility = (this->CenterAxes->GetVisibility() != 0);
  internals.ValuePassState->AnnotationVisibility = this->ShowAnnotation;
  this->SetOrientationAxesVisibility(false);
  this->SetCenterAxesVisibility(false);
  this->SetShowAnnotation(false);

  // now change the active pass.
  internals.SavedRenderPass = this->SynchronizedRenderers->GetRenderPass();
  this->SynchronizedRenderers->SetRenderPass(internals.ValuePasses);

#if VTK_MODULE_ENABLE_ParaView_icet
  // Let the IceTPass know FLOATING_POINT is already enabled.
  IceTPassEnableFloatPass(true, this->SynchronizedRenderers);
#endif

  return true;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::EndValuePassForRendering()
{
  auto& internals = (*this->Internals);
  if (!internals.ValuePassState)
  {
    return;
  }

#if VTK_MODULE_ENABLE_ParaView_icet
  // Let the IceTPass know vtkValuePass will be removed.
  IceTPassEnableFloatPass(false, this->SynchronizedRenderers);
#endif

  // restore render pass
  this->SynchronizedRenderers->SetRenderPass(internals.SavedRenderPass);
  internals.SavedRenderPass = nullptr;

  // restore annotation state
  this->SetCameraOrientationWidgetVisibility(
    internals.ValuePassState->CameraOrientationWidgetVisibility);
  this->SetOrientationAxesVisibility(internals.ValuePassState->OrientationAxesVisibility);
  this->SetCenterAxesVisibility(internals.ValuePassState->CenterAxesVisibility);
  this->SetShowAnnotation(internals.ValuePassState->AnnotationVisibility);
  internals.ValuePassState.reset();
}

//----------------------------------------------------------------------------
vtkSmartPointer<vtkFloatArray> vtkPVRenderView::GrabValuePassResult()
{
  auto& internals = (*this->Internals);
  if (!internals.ValuePassState)
  {
    return nullptr;
  }

  auto originalValues = internals.ValuePasses->GetFloatImageDataArray(this->GetRenderer());
  if (!originalValues)
  {
    return nullptr;
  }

  // originalValues may be 1 component or 4 component. When using IceT, they are
  // 4 component since IceT requires RGBF values. All components are identical,
  // so we can only care about the 1st component.
  if (originalValues->GetNumberOfComponents() == 1)
  {
    return originalValues;
  }
  else
  {
    vtkNew<vtkFloatArray> values;
    values->SetNumberOfComponents(1);
    values->SetNumberOfTuples(originalValues->GetNumberOfTuples());
    values->CopyComponent(0, originalValues, 0);
    return values;
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::CaptureZBuffer()
{
#if VTK_MODULE_ENABLE_ParaView_icet
  vtkIceTSynchronizedRenderers* IceTSynchronizedRenderers =
    vtkIceTSynchronizedRenderers::SafeDownCast(
      this->SynchronizedRenderers->GetParallelSynchronizer());
  if (IceTSynchronizedRenderers)
  {
    vtkIceTCompositePass* iceTPass = IceTSynchronizedRenderers->GetIceTCompositePass();
    if (iceTPass && iceTPass->GetLastRenderedDepths())
    {
      this->Internals->ArrayHolder->DeepCopy(iceTPass->GetLastRenderedDepths());
    }
  }
  else
#endif
  {
    this->Internals->ZGrabber->SetInput(this->GetRenderWindow());
    this->Internals->ZGrabber->ReadFrontBufferOff();
    this->Internals->ZGrabber->FixBoundaryOff();
    this->Internals->ZGrabber->ShouldRerenderOn();
    this->Internals->ZGrabber->SetScale(1, 1);
    this->Internals->ZGrabber->SetInputBufferTypeToZBuffer();
    this->Internals->ZGrabber->Modified();
    this->Internals->ZGrabber->Update();
    this->Internals->ArrayHolder->DeepCopy(
      this->Internals->ZGrabber->GetOutput()->GetPointData()->GetScalars());
  }
}

//------------------------------------------------------------------------------
vtkFloatArray* vtkPVRenderView::GetCapturedZBuffer()
{
  return this->Internals->ArrayHolder.GetPointer();
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetViewTime(double value)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetViewTime(value, ren);
#endif
  this->Superclass::SetViewTime(value);
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetEnableOSPRay(bool v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  if (v && !this->Internals->OSPRayPass)
  {
    this->Internals->OSPRayPass = vtkSmartPointer<vtkOSPRayPass>::New();
  }
  if (v && !vtkOSPRayPass::IsSupported())
  {
    vtkWarningMacro(
      "Refusing to enable OSPRay because it is not supported running in this configuration.");
    // Force disable.
    v = false;
  }
  if (this->Internals->IsInOSPRay == v)
  {
    return;
  }
  this->Internals->IsInOSPRay = v;
  vtkRenderer* ren = this->GetRenderer();
  if (v)
  {
    ren->SetUseShadows(this->Internals->OSPRayShadows);
    this->Internals->SavedRenderPass = this->SynchronizedRenderers->GetRenderPass();
    this->SynchronizedRenderers->SetRenderPass(this->Internals->OSPRayPass.GetPointer());
    this->SynchronizedRenderers->SetEnableRayTracing(true);
  }
  else
  {
    ren->SetUseShadows(false);
    this->SynchronizedRenderers->SetRenderPass(this->Internals->SavedRenderPass);
    this->SynchronizedRenderers->SetEnableRayTracing(false);
  }
  this->Modified();
#else
  if (v)
  {
    vtkWarningMacro("Refusing to enable OSPRay since either the client or "
                    "server does not have it.");
  }
#endif
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetEnableOSPRay()
{
  return this->Internals->IsInOSPRay;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetMaterialLibrary(vtkPVMaterialLibrary* ml)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  if (ml)
  {
    vtkRenderer* ren = this->GetRenderer();
    vtkOSPRayRendererNode::SetMaterialLibrary(
      vtkOSPRayMaterialLibrary::SafeDownCast(ml->GetMaterialLibrary()), ren);
  }
#else
  (void)ml;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetOSPRayRendererType(std::string name)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetRendererType(name, ren);
  const bool pathtrace = (name.find(std::string("pathtracer")) != std::string::npos);
  this->SynchronizedRenderers->SetEnablePathTracing(pathtrace);
#else
  (void)name;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetShadows(bool v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  this->Internals->OSPRayShadows = v;
  vtkRenderer* ren = this->GetRenderer();
  if (this->Internals->IsInOSPRay)
  {
    ren->SetUseShadows(v);
  }
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetShadows()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return (ren->GetUseShadows() == 1);
#else
  return false;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetAmbientOcclusionSamples(int v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetAmbientSamples(v, ren);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetAmbientOcclusionSamples()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return vtkOSPRayRendererNode::GetAmbientSamples(ren);
#else
  return 0;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetRouletteDepth(int v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetRouletteDepth(v, ren);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetRouletteDepth()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return vtkOSPRayRendererNode::GetRouletteDepth(ren);
#else
  return 0;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetSamplesPerPixel(int v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetSamplesPerPixel(v, ren);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetSamplesPerPixel()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return vtkOSPRayRendererNode::GetSamplesPerPixel(ren);
#else
  return 1;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetMaxFrames(int v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetMaxFrames(v, ren);
  static bool warned_once = false;
  if (!warned_once && v > 1 && vtkPVView::GetEnableStreaming() == false)
  {
    vtkWarningMacro(
      "You must enable streaming in Edit->Settings/Preferences for iterative refinement.");
    warned_once = true;
  }
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetMaxFrames()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return vtkOSPRayRendererNode::GetMaxFrames(ren);
#else
  return 1;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetDenoise(bool v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  this->Internals->OSPRayDenoise = v;
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetEnableDenoiser(v, ren);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetDenoise()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return (vtkOSPRayRendererNode::GetEnableDenoiser(ren) == 1);
#else
  return false;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetLightScale(double v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkOSPRayLightNode::SetLightScale(v);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
double vtkPVRenderView::GetLightScale()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  return vtkOSPRayLightNode::GetLightScale();
#else
  return 0.5;
#endif
}

//----------------------------------------------------------------------------
bool vtkPVRenderView::GetOSPRayContinueStreaming()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  if (!this->Internals->IsInOSPRay)
  {
    return false;
  }
  this->Internals->OSPRayCount++;
  bool keep_going = this->Internals->OSPRayCount < this->GetMaxFrames();
  if (!keep_going)
  {
    this->Internals->OSPRayCount = 0;
  }
  return keep_going;
#else
  return false;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackgroundNorth(double x, double y, double z)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  double dir[3] = { x, y, z };
  vtkOSPRayRendererNode::SetNorthPole(dir, ren);
#else
  (void)x;
  (void)y;
  (void)z;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetBackgroundEast(double x, double y, double z)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  double dir[3] = { x, y, z };
  vtkOSPRayRendererNode::SetEastPole(dir, ren);
#else
  (void)x;
  (void)y;
  (void)z;
#endif
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetTimeCacheSize(int v)
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  vtkOSPRayRendererNode::SetTimeCacheSize(v, ren);
#else
  (void)v;
#endif
}

//----------------------------------------------------------------------------
int vtkPVRenderView::GetTimeCacheSize()
{
#if VTK_MODULE_ENABLE_VTK_RenderingRayTracing
  vtkRenderer* ren = this->GetRenderer();
  return vtkOSPRayRendererNode::GetTimeCacheSize(ren);
#else
  return 0;
#endif
}

//----------------------------------------------------------------------------
vtkPVCameraCollection* vtkPVRenderView::GetDiscreteCameras(
  vtkInformation* info, vtkPVDataRepresentation* vtkNotUsed(repr))
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return nullptr;
  }

  return self->DiscreteCameras;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetDiscreteCameras(
  vtkInformation* info, vtkPVDataRepresentation*, vtkPVCameraCollection* style)
{
  vtkPVRenderView* self = vtkPVRenderView::SafeDownCast(info->Get(VIEW()));
  if (!self)
  {
    vtkGenericWarningMacro("Missing VIEW().");
    return;
  }

  self->DiscreteCameras = style;
}

//----------------------------------------------------------------------------
void vtkPVRenderView::ScaleRendererViewports(const double viewport[4])
{
  this->Superclass::ScaleRendererViewports(viewport);
  this->OrientationWidget->SetViewport(viewport[0], viewport[1],
    viewport[0] + 0.25 * (viewport[2] - viewport[0]),
    viewport[1] + 0.25 * (viewport[3] - viewport[1]));
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SynchronizeMaximumIds(vtkIdType* maxPointId, vtkIdType* maxCellId)
{
  if (this->SynchronizedRenderers->GetEnabled())
  {
    vtkTypeUInt64 ptid = static_cast<vtkTypeUInt64>(*maxPointId);
    vtkTypeUInt64 cellid = static_cast<vtkTypeUInt64>(*maxCellId);

    // skip data server since this method is only called on processes involved
    // in rendering.
    this->AllReduce(ptid, ptid, vtkCommunicator::MAX_OP,
      /*skip_data_server=*/true);
    this->AllReduce(cellid, cellid, vtkCommunicator::MAX_OP,
      /*skip_data_server=*/true);

    *maxPointId = static_cast<vtkIdType>(ptid);
    *maxCellId = static_cast<vtkIdType>(cellid);
  }
}

//----------------------------------------------------------------------------
void vtkPVRenderView::SetHardwareSelector(vtkPVHardwareSelector* selector)
{
  // Clear selection props registered with the previous hardware selector
  this->Internals->ClearSelectionProps();

  this->Selector = selector;
  this->Selector->SetView(this); // not reference counted.
}
