vtkGPUVolumeRayCastMapper.h

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/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkGPUVolumeRayCastMapper.h

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/
#ifndef vtkGPUVolumeRayCastMapper_h
#define vtkGPUVolumeRayCastMapper_h
#include <unordered_map> // For std::unordered_map
#include <vector>        // For std::vector

#include "vtkVolumeMapper.h"
#include <vtkRenderingVolumeModule.h> // For export macro

class vtkContourValues;
class vtkRenderWindow;
class vtkVolumeProperty;

class VTKRENDERINGVOLUME_EXPORT vtkGPUVolumeRayCastMapper : public vtkVolumeMapper
{
public:
  static vtkGPUVolumeRayCastMapper* New();
  vtkTypeMacro(vtkGPUVolumeRayCastMapper, vtkVolumeMapper);
  void PrintSelf(ostream& os, vtkIndent indent) override;


  vtkSetClampMacro(AutoAdjustSampleDistances, vtkTypeBool, 0, 1);
  vtkGetMacro(AutoAdjustSampleDistances, vtkTypeBool);
  vtkBooleanMacro(AutoAdjustSampleDistances, vtkTypeBool);


  vtkSetClampMacro(LockSampleDistanceToInputSpacing, vtkTypeBool, 0, 1);
  vtkGetMacro(LockSampleDistanceToInputSpacing, vtkTypeBool);
  vtkBooleanMacro(LockSampleDistanceToInputSpacing, vtkTypeBool);


  vtkSetClampMacro(UseJittering, vtkTypeBool, 0, 1);
  vtkGetMacro(UseJittering, vtkTypeBool);
  vtkBooleanMacro(UseJittering, vtkTypeBool);


  vtkSetClampMacro(UseDepthPass, vtkTypeBool, 0, 1);
  vtkGetMacro(UseDepthPass, vtkTypeBool);
  vtkBooleanMacro(UseDepthPass, vtkTypeBool);

  vtkContourValues* GetDepthPassContourValues();


  vtkSetMacro(SampleDistance, float);
  vtkGetMacro(SampleDistance, float);


  vtkSetClampMacro(ImageSampleDistance, float, 0.1f, 100.0f);
  vtkGetMacro(ImageSampleDistance, float);


  vtkSetClampMacro(MinimumImageSampleDistance, float, 0.1f, 100.0f);
  vtkGetMacro(MinimumImageSampleDistance, float);


  vtkSetClampMacro(MaximumImageSampleDistance, float, 0.1f, 100.0f);
  vtkGetMacro(MaximumImageSampleDistance, float);


  vtkSetMacro(FinalColorWindow, float);
  vtkGetMacro(FinalColorWindow, float);
  vtkSetMacro(FinalColorLevel, float);
  vtkGetMacro(FinalColorLevel, float);


  vtkSetMacro(MaxMemoryInBytes, vtkIdType);
  vtkGetMacro(MaxMemoryInBytes, vtkIdType);


  vtkSetClampMacro(MaxMemoryFraction, float, 0.1f, 1.0f);
  vtkGetMacro(MaxMemoryFraction, float);


  vtkSetMacro(ReportProgress, bool);
  vtkGetMacro(ReportProgress, bool);

  virtual int IsRenderSupported(
    vtkRenderWindow* vtkNotUsed(window), vtkVolumeProperty* vtkNotUsed(property))
  {
    return 0;
  }

  void CreateCanonicalView(vtkRenderer* ren, vtkVolume* volume, vtkImageData* image, int blend_mode,
    double viewDirection[3], double viewUp[3]);


  void SetMaskInput(vtkImageData* mask);
  vtkGetObjectMacro(MaskInput, vtkImageData);

  enum
  {
    BinaryMaskType = 0,
    LabelMapMaskType
  };


  vtkSetMacro(MaskType, int);
  vtkGetMacro(MaskType, int);
  void SetMaskTypeToBinary();
  void SetMaskTypeToLabelMap();


  vtkSetClampMacro(MaskBlendFactor, float, 0.0f, 1.0f);
  vtkGetMacro(MaskBlendFactor, float);


  vtkSetMacro(RenderToImage, vtkTypeBool);
  vtkGetMacro(RenderToImage, vtkTypeBool);
  vtkBooleanMacro(RenderToImage, vtkTypeBool);


  vtkSetMacro(DepthImageScalarType, int);
  vtkGetMacro(DepthImageScalarType, int);
  void SetDepthImageScalarTypeToUnsignedChar();
  void SetDepthImageScalarTypeToUnsignedShort();
  void SetDepthImageScalarTypeToFloat();


  vtkSetMacro(ClampDepthToBackface, vtkTypeBool);
  vtkGetMacro(ClampDepthToBackface, vtkTypeBool);
  vtkBooleanMacro(ClampDepthToBackface, vtkTypeBool);

  virtual void GetDepthImage(vtkImageData*) {}

  virtual void GetColorImage(vtkImageData*) {}

  void Render(vtkRenderer*, vtkVolume*) override;

  virtual void GPURender(vtkRenderer*, vtkVolume*) {}

  void ReleaseGraphicsResources(vtkWindow*) override {}

  virtual void GetReductionRatio(double ratio[3]) = 0;

  enum TFRangeType
  {
    SCALAR = 0, // default
    NATIVE
  };


  vtkSetMacro(ColorRangeType, int);
  vtkGetMacro(ColorRangeType, int);
  vtkSetMacro(ScalarOpacityRangeType, int);
  vtkGetMacro(ScalarOpacityRangeType, int);
  vtkSetMacro(GradientOpacityRangeType, int);
  vtkGetMacro(GradientOpacityRangeType, int);

  vtkImageData* GetInput() override { return this->GetInput(0); };


  void RemoveInputConnection(int port, vtkAlgorithmOutput* input) override;
  void RemoveInputConnection(int port, int idx) override;
  void SetInputConnection(int port, vtkAlgorithmOutput* input) override;
  void SetInputConnection(vtkAlgorithmOutput* input) override
  {
    this->SetInputConnection(0, input);
  }

  int GetInputCount();

  vtkImageData* GetTransformedInput(const int port = 0);

  double* GetBoundsFromPort(const int port) VTK_SIZEHINT(6);

protected:
  vtkGPUVolumeRayCastMapper();
  ~vtkGPUVolumeRayCastMapper() override;

  int FillInputPortInformation(int port, vtkInformation* info) override;

  void TransformInput(const int port);


  int ValidateRender(vtkRenderer*, vtkVolume*);
  int ValidateInputs();
  int ValidateInput(vtkVolumeProperty* property, const int port);


  void CloneInputs();
  void CloneInput(vtkImageData* input, const int port);

  // Special version of render called during the creation
  // of a canonical view.
  void CanonicalViewRender(vtkRenderer*, vtkVolume*);

  // Methods called by the AMR Volume Mapper.
  virtual void PreRender(vtkRenderer* ren, vtkVolume* vol, double datasetBounds[6],
    double scalarRange[2], int numberOfScalarComponents, unsigned int numberOfLevels) = 0;

  // \pre input is up-to-date
  virtual void RenderBlock(vtkRenderer* ren, vtkVolume* vol, unsigned int level) = 0;

  virtual void PostRender(vtkRenderer* ren, int numberOfScalarComponents) = 0;
  vtkImageData* GetInput(const int port) override;

  void SetCellFlag(int cellFlag);
  void RemovePortInternal(const int port);

  vtkTypeBool LockSampleDistanceToInputSpacing;
  vtkTypeBool AutoAdjustSampleDistances;
  float ImageSampleDistance;
  float MinimumImageSampleDistance;
  float MaximumImageSampleDistance;

  // Render to texture mode flag
  vtkTypeBool RenderToImage;

  // Depth image scalar type
  int DepthImageScalarType;

  // Clamp depth values to the depth of the face at which the ray
  // exits the volume
  vtkTypeBool ClampDepthToBackface;

  // Enable / disable stochastic jittering
  vtkTypeBool UseJittering;

  // Enable / disable two pass rendering
  vtkTypeBool UseDepthPass;
  vtkContourValues* DepthPassContourValues;

  // The distance between sample points along the ray
  float SampleDistance;

  int SmallVolumeRender;
  double BigTimeToDraw;
  double SmallTimeToDraw;

  float FinalColorWindow;
  float FinalColorLevel;

  // 1 if we are generating the canonical image, 0 otherwise
  int GeneratingCanonicalView;
  vtkImageData* CanonicalViewImageData;


  vtkSetClampMacro(AMRMode, vtkTypeBool, 0, 1);
  vtkGetMacro(AMRMode, vtkTypeBool);
  vtkBooleanMacro(AMRMode, vtkTypeBool);

  vtkImageData* MaskInput;
  float MaskBlendFactor;
  int MaskType;

  vtkTypeBool AMRMode;

  // Transfer function range type
  int ColorRangeType;
  int ScalarOpacityRangeType;
  int GradientOpacityRangeType;

  // Point data or cell data (or field data, not handled) ?
  int CellFlag;

  virtual void ClipCroppingRegionPlanes();

  using DataMap = std::unordered_map<int, vtkImageData*>;
  void SetTransformedInput(vtkImageData*);
  vtkImageData* FindData(int port, DataMap& container);

  double ClippedCroppingRegionPlanes[6];

  vtkIdType MaxMemoryInBytes;
  float MaxMemoryFraction;

  bool ReportProgress;
  std::vector<int> Ports;
  std::vector<int> RemovedPorts;
  DataMap TransformedInputs;

  DataMap LastInputs;

private:
  vtkGPUVolumeRayCastMapper(const vtkGPUVolumeRayCastMapper&) = delete;
  void operator=(const vtkGPUVolumeRayCastMapper&) = delete;
};

#endif