Inventor/nodes/SoShaderObject.h

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 *** THE CONTENT OF THIS WORK IS PROPRIETARY TO FEI S.A.S, (FEI S.A.S.),            ***
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 ***  SPECIFIED  IN THE LICENSE ARE  NOT TO BE  UNDERTAKEN  EXCEPT WITH PRIOR       ***
 ***  WRITTEN AUTHORIZATION OF FEI S.A.S.                                           ***
 ***                                                                                ***
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 ***                   COPYRIGHT (C) 1996-2020 BY FEI S.A.S,                        ***
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**=======================================================================*/
/*=======================================================================
** Author      : VSG (MMM YYYY)
**=======================================================================*/

                                                             /* include files */
#ifndef _SO_SHADER_OBJECT_H_
#define _SO_SHADER_OBJECT_H_

#include <Inventor/SbBasic.h>
#include <Inventor/SbString.h>
#include <Inventor/nodes/SoNode.h>
#include <Inventor/fields/SoSFFilePathString.h>
#include <Inventor/fields/SoSFEnum.h>
#include <Inventor/fields/SoSFBool.h>
#include <Inventor/fields/SoMFUniformShaderParameter.h>

#include <Inventor/STL/cassert>
#include <Inventor/STL/map>
#include <Inventor/helpers/SbConstCharMap.h>

class SoGLShaderContainer ;
class SoGLShaderObject ;
class SoFieldSensor ;
class SoNodeSensor ;
class SoFileSensor ;
class SoShaderParser;

#ifdef _MSC_VER
#pragma warning( push )
#pragma warning(disable:4251)
#endif

class  SoShaderObject : public SoNode
{

  SO_NODE_ABSTRACT_HEADER(SoShaderObject);

public:

  enum SourceType
  {
      ARB_PROGRAM,

      CG_PROGRAM,

      GLSL_PROGRAM,

      FILENAME
  };

  SoSFBool isActive;

  SoSFEnum sourceType;

  SoSFFilePathString sourceProgram;

  SoMFUniformShaderParameter parameter;

  template<typename UniformParamType, typename ParamValueType>
  UniformParamType* addShaderParameter(const SbString& name, ParamValueType val);

  enum ShaderType
  {
    VERTEX_SHADER,
    GEOMETRY_SHADER,
    FRAGMENT_SHADER,
    TESSELLATION_CONTROL_SHADER,
    TESSELLATION_EVALUATION_SHADER
  };

  virtual ShaderType getShaderType() const = 0;

  template<typename UniformParamType, typename ParamValueType>
  void setShaderParameter(const SbString& name, ParamValueType val);

#ifndef HIDDEN_FROM_DOC
  //Generate all setFragmentParameter* methods
#define MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(ParamType)\
 \
  template<typename ParamValueType>\
  void\
  setShaderParameter ## ParamType(const SbString& name, ParamValueType val)\
  {\
  setShaderParameter<SoShaderParameter ## ParamType>(name, val);\
  }
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(1i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(2i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(3i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(4i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(1f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(2f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(3f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(4f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array1f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array2f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array3f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array4f)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array1i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array2i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array3i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Array4i)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Matrix)
#undef MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER

//Generate all addShaderParameter* methods
#define MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(ParamType)\
 \
  template<typename ParamValueType>\
  SoShaderParameter ## ParamType *\
  addShaderParameter ## ParamType(const SbString& name, ParamValueType val)\
  {\
  return addShaderParameter<SoShaderParameter ## ParamType>(name, val);\
  }
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(1i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(2i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(3i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(4i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(1f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(2f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(3f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(4f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array1f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array2f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array3f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array4f)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array1i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array2i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array3i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Array4i)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Matrix)
#undef MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER
#endif //HIDDEN_FROM_DOC

  /*----------------------------------------------------------------------------*/

private:

  void createGLShaderObject(SoState* state, SoGLShaderContainer *glShaderContainer,
                            const SbString& shaderVersion, const SbString& shaderProfile);

  // void updateParameter(SoState *state);

  SoGLShaderObject* getGLShaderObject() const
  { return m_glShaderObject; }

  SourceType getSourceType();

  static void initClass();
  static void exitClass() ;

  SbBool isInternal() const;

  // Really send the parameters from start to start + num to the shaders.
  void updateParameters(SoGLRenderAction* action, int start, int num) ;

  // Really send all the parameters to the shaders.
  void updateAllParameters(SoGLRenderAction* action) ;

  // Update state matrix paramaters
  void updateStateMatrixParameters(SoGLRenderAction* action) ;

  // Returns TRUE if at least one parameter is of SoShaderStateMatrixParameter type
  SbBool containStateMatrixParameters() const
  { return (m_stateMatrixParameters.getLength() != 0) ; }

  SbString getSourceProgram() const
  { return m_sourceProgram;}

  inline bool isFileFound() const;

  inline bool needUpdate() const { return m_needUpdate; }

  void invalidate();

  void setDefine(const char* name, const char* value);
  void setDefine(const char* name, const SbString& value)
  { setDefine(name,value.toLatin1()); }

  void removeDefine(const char* name);

  void checkValidity();

  inline void setVersion(const SbString& version) { m_version = version; }

  const SbString& getVersion();

  const SbString& getProfile();

  inline void setProfile(const SbString& profile) { m_profile = profile; }

  static bool isShaderObjectAvailable(SoState* state);

  static bool isGLSLLanguageAvailable(SoState* state);

  void invalidateSource();

  void buildSourceToLoad(SbString &builtSource);

  SbString getFileAbsolutePath(const SbString& filename);

private:

  virtual void notify(SoNotList *list);

  friend class SoShaderProgram;
  typedef SbConstCharMap<SbString> DefineMap;
  typedef DefineMap::iterator DefineMapIt;

  typedef std::vector<SbString> SbStringVector;

  void setGlobalDefine(const DefineMap& map);

  void setDefine(DefineMap::value_type& p);

  bool hasDefine(const char* name) const;

  typedef std::set<SbString> HeaderSet;
  typedef HeaderSet::iterator HeaderSetIt;

  void setGlobalHeader(const HeaderSet& map);

  // Extract the source from a given file if sourceType equals FILENAME.
  void readSource();

  SoShaderObject();

  // Destructor
  virtual ~SoShaderObject();

private:
  SoShaderParser* m_parser;
  SoGLShaderObject *m_glShaderObject;
  SourceType        m_sourceType ;
  SbString          m_sourceProgram;

  SbString m_version;
  SbString m_profile;
  typedef std::map<std::string, std::string> ExtensionMap;
  ExtensionMap m_extensionList;

  typedef std::map<SbString, SbString> StrStrMap;

  void extractInfosFromSource(SbString& version, SbString& source,SbString& profile, ExtensionMap& extensionList);

  bool isEmptyLine(const std::string& line) const;

  static SbString definesExtension(const SbString& source, const ExtensionMap::value_type& p);

  static SbString definesAcc(const SbString& source, const DefineMap::value_type& p);

  //void loadSource();
  static void fileSensorCB(void *data, SoSensor *) ;
  static void parameterSensorCB(void *data, SoSensor *) ;

  DefineMap m_defineMap;

  DefineMap m_defineGlobalMap;

  HeaderSet m_headerGlobalSet;

  SbStringVector m_includeSourceVector;

  SoFileSensor* m_fileSensor;

  SbString m_directoryFound;

  // Checks dynamically the parameters' modifications.
  SoFieldSensor *m_paramSensor ;

  // Update the list of state matrix parameters
  void updateStateMatrixList() ;

  // Store the list of state matrix parameters
  SoNodeList    m_stateMatrixParameters ;

  // True if the shader can't be read
  bool m_fileFound;

  bool m_needUpdate;

  bool m_needRead;

  static int s_shader_objects_extensionID;
  static int s_shading_language_100_extensionID;
  static int s_gpu_shader4_extensionID;

  static StrStrMap s_shadersPaths;
  static SbThreadRWMutex s_shadersPathsMutex;
  static bool s_debugCache;
};
/*----------------------------------------------------------------------------*/

/*******************************************************************************/
template<typename UniformParamType, typename ParamValueType>
UniformParamType*
SoShaderObject::addShaderParameter(const SbString& name, ParamValueType val)
{
  UniformParamType *param = dynamic_cast<UniformParamType *>(parameter.findUniformParameterByName(name));
  if (param)
  {
    // This parameter already exist => prefer to replace it
    param->value.setValue(val);
  }
  else
  {
    param = new UniformParamType;
    param->name = name;
    param->value.setValue(val);
    parameter.addShaderParameter(param);
  }

  return param;
}

/*****************************************************************************/
template<typename UniformParamType, typename ParamValueType>
void
SoShaderObject::setShaderParameter(const SbString& name, ParamValueType val)
{
  SoUniformShaderParameter* param = parameter.findUniformParameterByName(name);
  assert(param);
  assert(param->isOfType(UniformParamType::getClassTypeId()) == TRUE);
  UniformParamType* i = static_cast<UniformParamType*>(param);
  i->value = val;
}

/*****************************************************************************/
bool
SoShaderObject::isFileFound() const
{
  return m_fileFound;
}

#ifdef _MSC_VER
#pragma warning( pop )
#endif

#endif /*_SO_SHADER_OBJECT_H_*/

---

Open Inventor Toolkit reference manual, generated on 12 Feb 2024
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