vtkLabeledContourMapper.h

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

  Program:   Visualization Toolkit
  Module:    vtkLabeledContourMapper.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 vtkLabeledContourMapper_h
#define vtkLabeledContourMapper_h

#include "vtkRenderingCoreModule.h" // For export macro

#include "vtkMapper.h"
#include "vtkNew.h" // For vtkNew
#include "vtkSmartPointer.h" // For vtkSmartPointer

class vtkDoubleArray;
class vtkTextActor3D;
class vtkTextProperty;
class vtkTextPropertyCollection;
class vtkPolyData;
class vtkPolyDataMapper;

class VTKRENDERINGCORE_EXPORT vtkLabeledContourMapper : public vtkMapper
{
public:
  static vtkLabeledContourMapper *New();
  vtkTypeMacro(vtkLabeledContourMapper, vtkMapper)
  void PrintSelf(ostream& os, vtkIndent indent) override;

  void Render(vtkRenderer *ren, vtkActor *act) override;


  void SetInputData(vtkPolyData *in);
  vtkPolyData *GetInput();


  double *GetBounds() override;
  void GetBounds(double bounds[6]) override;

  virtual void SetTextProperty(vtkTextProperty *tprop);


  virtual void SetTextProperties(vtkTextPropertyCollection *coll);
  virtual vtkTextPropertyCollection *GetTextProperties();


  virtual vtkDoubleArray* GetTextPropertyMapping();
  virtual void SetTextPropertyMapping(vtkDoubleArray *mapping);


  vtkSetMacro(LabelVisibility, bool)
  vtkGetMacro(LabelVisibility, bool)
  vtkBooleanMacro(LabelVisibility, bool)


  vtkSetMacro(SkipDistance, double)
  vtkGetMacro(SkipDistance, double)


  vtkGetNewMacro(PolyDataMapper, vtkPolyDataMapper)

  void ReleaseGraphicsResources(vtkWindow *) override;

protected:
  vtkLabeledContourMapper();
  ~vtkLabeledContourMapper() override;

  virtual void ComputeBounds();

  int FillInputPortInformation(int, vtkInformation*) override;

  void Reset();

  bool CheckInputs(vtkRenderer *ren);
  bool CheckRebuild(vtkRenderer *ren, vtkActor *act);
  bool PrepareRender(vtkRenderer *ren, vtkActor *act);
  bool PlaceLabels();
  bool ResolveLabels();
  virtual bool CreateLabels(vtkActor *actor);
  bool BuildStencilQuads();
  virtual bool ApplyStencil(vtkRenderer *ren, vtkActor *act);
  bool RenderPolyData(vtkRenderer *ren, vtkActor *act);
  virtual bool RemoveStencil(vtkRenderer *ren);
  bool RenderLabels(vtkRenderer *ren, vtkActor *act);

  bool AllocateTextActors(vtkIdType num);
  bool FreeTextActors();

  double SkipDistance;

  bool LabelVisibility;
  vtkIdType NumberOfTextActors;
  vtkIdType NumberOfUsedTextActors;
  vtkTextActor3D **TextActors;

  vtkNew<vtkPolyDataMapper> PolyDataMapper;
  vtkSmartPointer<vtkTextPropertyCollection> TextProperties;
  vtkSmartPointer<vtkDoubleArray> TextPropertyMapping;

  float *StencilQuads;
  vtkIdType StencilQuadsSize;
  unsigned int *StencilQuadIndices;
  vtkIdType StencilQuadIndicesSize;
  void FreeStencilQuads();

  vtkTimeStamp LabelBuildTime;

private:
  vtkLabeledContourMapper(const vtkLabeledContourMapper&) = delete;
  void operator=(const vtkLabeledContourMapper&) = delete;

  struct Private;
  Private *Internal;
};

#endif