SoView2DShaderFunction.h

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/*************************************************************************************
**
** Copyright 2009, MeVis Medical Solutions AG
**
** The user may use this file in accordance with the license agreement provided with
** the Software or, alternatively, in accordance with the terms contained in a
** written agreement between the user and MeVis Medical Solutions AG.
**
** For further information use the contact form at https://www.mevislab.de/contact
**
**************************************************************************************/
 
#pragma once
 
#include "ShaderPipeline/ShaderPipelineCustomFunction.h"
#include "SoView2DShaderBuiltInFunctions.h"
#include "SoView2DShaderDefinition.h"
#include "SoView2DShaderOperation.h"
 
#include <Inventor/nodes/SoSubNode.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoSFString.h>
 
class SoView2DShaderFunctionBase : public SoNode
{
  SO_NODE_HEADER(SoView2DShaderFunctionBase);
 
public:
  SoView2DShaderFunctionBase();
  ~SoView2DShaderFunctionBase() override;
 
  static void initClass();
 
  SoSFBool enabled;
 
  SoSFString functionName;
  SoSFString functionBody;
  SoSFString parameterDeclaration;
  SoSFString substep;
 
  SoSFString functionDisplay;
 
  SoSFString replaced1;
  SoSFString replacement1;
  SoSFString replaced2;
  SoSFString replacement2;
  SoSFString replaced3;
  SoSFString replacement3;
 
protected:
  ShaderPipelineCustomFunction _function;
 
  SoView2DShaderOperation _operation;
 
private:
 
  void updateFunctionName(SoField* field = nullptr);
 
  void updateFunctionBody(SoField* field = nullptr);
 
  void updateFunctionDisplay();
 
  void updateParameters(SoField* field = nullptr);
 
  void updateSubstep(SoField* field = nullptr);
 
  void updateAll(SoField* field = nullptr);
 
  struct Parameter
  {
    enum ParameterType
    {
      PT_UNIFORM,
      PT_VARYING,
      PT_ATTRIBUTE,
      PT_STATE,
      PT_INCLUDE
    };
 
    ParameterType parameterType;
    std::string valueType;
    std::string name;
    std::string size;
    std::string defaultValue;
  };
 
  typedef std::vector<Parameter> ParameterVector;
  typedef std::vector<std::string> StringVector;
  typedef std::vector<SoSFString*> StringFieldVector;
 
  void parseParameterDeclarationText(ParameterVector& target, const std::string& source);
 
  bool parseParameterDeclarationLine(Parameter& parameter, const std::string& line);
 
  bool parseTokens(Parameter& parameter, const StringVector& tokens);
 
  bool checkTokens(const StringVector& tokens, size_t numberOfRequiredTokens);
 
  bool isReplacementField(SoField* field);
 
  void doReplacement(std::string& value);
 
  StringFieldVector _replacedStringFields;
 
  StringFieldVector _replacementStringFields;
};
 
 
class SoView2DShaderFunction : public SoView2DShaderFunctionBase
{
  SO_NODE_HEADER(SoView2DShaderFunction);
 
  SoView2DShaderFunction();
 
public:
 
  static void initClass();
 
  SoSFEnum modificationType;
  SoSFEnum fragmentStep;
  SoSFBool needsActiveStep;
 
protected:
  void GLRender(SoGLRenderAction *action) override;
};