vtkLineIntegralConvolution2D.h

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

  Program:   Visualization Toolkit
  Module:    vtkLineIntegralConvolution2D.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 vtkLineIntegralConvolution2D_h
#define vtkLineIntegralConvolution2D_h

#include "vtkObject.h"
#include "vtkWeakPointer.h" // for ren context
#include "vtkRenderingLICOpenGL2Module.h" // for export macro
#include <deque> // for deque

class vtkOpenGLFramebufferObject;
class vtkOpenGLHelper;
class vtkOpenGLRenderWindow;
class vtkPainterCommunicator;
class vtkPixelExtent;
class vtkRenderWindow;
class vtkShaderProgram;
class vtkTextureObject;

class VTKRENDERINGLICOPENGL2_EXPORT vtkLineIntegralConvolution2D : public vtkObject
{
public:
  static vtkLineIntegralConvolution2D *New();
  vtkTypeMacro(vtkLineIntegralConvolution2D, vtkObject);
  void PrintSelf(ostream & os, vtkIndent indent) override;

  static bool IsSupported(vtkRenderWindow * renWin);


  void SetContext(vtkOpenGLRenderWindow *context);
  vtkOpenGLRenderWindow *GetContext();


  vtkSetClampMacro(EnhancedLIC, int, 0, 1);
  vtkGetMacro(EnhancedLIC, int);
  vtkBooleanMacro(EnhancedLIC, int);


  enum {
    ENHANCE_CONTRAST_OFF=0,
    ENHANCE_CONTRAST_ON=1};
  vtkSetClampMacro(EnhanceContrast, int, 0, 2);
  vtkGetMacro(EnhanceContrast, int);
  vtkBooleanMacro(EnhanceContrast, int);


  vtkSetClampMacro(LowContrastEnhancementFactor, double, 0.0, 1.0);
  vtkGetMacro(LowContrastEnhancementFactor, double);
  vtkSetClampMacro(HighContrastEnhancementFactor, double, 0.0, 1.0);
  vtkGetMacro(HighContrastEnhancementFactor, double);


  vtkSetClampMacro(AntiAlias, int, 0, VTK_INT_MAX);
  vtkGetMacro(AntiAlias, int);
  vtkBooleanMacro(AntiAlias, int);


  vtkSetClampMacro(NumberOfSteps, int, 0, VTK_INT_MAX);
  vtkGetMacro(NumberOfSteps, int);


  vtkSetClampMacro(StepSize, double, 0.0, VTK_FLOAT_MAX);
  vtkGetMacro(StepSize, double);


  void SetComponentIds(int c0, int c1);
  void SetComponentIds(int c[2]){ this->SetComponentIds(c[0], c[1]); }
  vtkGetVector2Macro(ComponentIds, int);


  vtkSetClampMacro(MaxNoiseValue, double, 0.0, 1.0);
  vtkGetMacro(MaxNoiseValue, double);


  void SetTransformVectors(int val);
  vtkGetMacro(TransformVectors, int);

  void SetNormalizeVectors(int val);
  vtkGetMacro(NormalizeVectors, int);


  vtkSetClampMacro(MaskThreshold, double, -1.0, VTK_FLOAT_MAX);
  vtkGetMacro(MaskThreshold, double);


  vtkTextureObject *Execute(
        vtkTextureObject *vectorTex,
        vtkTextureObject *noiseTex);

  vtkTextureObject *Execute(
        const int extent[4],
        vtkTextureObject *vectorTex,
        vtkTextureObject *noiseTex);

  vtkTextureObject *Execute(
        const vtkPixelExtent &inputTexExtent,
        const std::deque<vtkPixelExtent> &vectorExtent,
        const std::deque<vtkPixelExtent> &licExtent,
        vtkTextureObject *vectorTex,
        vtkTextureObject *maskVectorTex,
        vtkTextureObject *noiseTex);

  static
  void SetVectorTexParameters(vtkTextureObject *vectors);

  static
  void SetNoiseTexParameters(vtkTextureObject *noise);

  virtual void SetCommunicator(vtkPainterCommunicator *){}
  virtual vtkPainterCommunicator *GetCommunicator();

 virtual void GetGlobalMinMax(
       vtkPainterCommunicator*,
       float&,
       float&) {}

  virtual void WriteTimerLog(const char *){}

protected:
  vtkLineIntegralConvolution2D();
  ~vtkLineIntegralConvolution2D() override;

  vtkPainterCommunicator *Comm;

  void SetVTShader(vtkShaderProgram *prog);
  void SetLIC0Shader(vtkShaderProgram *prog);
  void SetLICIShader(vtkShaderProgram *prog);
  void SetLICNShader(vtkShaderProgram *prog);
  void SetEEShader(vtkShaderProgram *prog);
  void SetCEShader(vtkShaderProgram *prog);
  void SetAAHShader(vtkShaderProgram *prog);
  void SetAAVShader(vtkShaderProgram *prog);

  void BuildShaders();

  void RenderQuad(
        float computeBounds[4],
        vtkPixelExtent computeExtent);

  vtkTextureObject *AllocateBuffer(unsigned int texSize[2]);

  void SetNoise2TexParameters(vtkTextureObject *noise);

  virtual void StartTimerEvent(const char *){}
  virtual void EndTimerEvent(const char *){}

protected:
  vtkWeakPointer<vtkOpenGLRenderWindow> Context;
  vtkOpenGLFramebufferObject *FBO;

  int ShadersNeedBuild;
  vtkOpenGLHelper *FinalBlendProgram;
  vtkOpenGLHelper *IntermediateBlendProgram;
  vtkOpenGLHelper *VTShader;
  vtkOpenGLHelper *LIC0Shader;
  vtkOpenGLHelper *LICIShader;
  vtkOpenGLHelper *LICNShader;
  vtkOpenGLHelper *EEShader;
  vtkOpenGLHelper *CEShader;
  vtkOpenGLHelper *AAHShader;
  vtkOpenGLHelper *AAVShader;

  int     NumberOfSteps;
  double  StepSize;
  int     EnhancedLIC;
  int     EnhanceContrast;
  double  LowContrastEnhancementFactor;
  double  HighContrastEnhancementFactor;
  int     AntiAlias;
  int     NoiseTextureLookupCompatibilityMode;
  double  MaskThreshold;
  int     TransformVectors;
  int     NormalizeVectors;
  int     ComponentIds[2];
  double  MaxNoiseValue;

private:
  vtkLineIntegralConvolution2D(const vtkLineIntegralConvolution2D &) = delete;
  void operator = (const vtkLineIntegralConvolution2D &) = delete;
};

#endif