SoShaderObject.h

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 ***                   COPYRIGHT (C) 1996-2023 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/SbEnums.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
  {SoDEPRECATED
      ARB_PROGRAM,
SoDEPRECATED
      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 = SbEnums::SHADER_TYPE_VERTEX,
    GEOMETRY_SHADER = SbEnums::SHADER_TYPE_GEOMETRY,
    FRAGMENT_SHADER = SbEnums::SHADER_TYPE_FRAGMENT,
    TESSELLATION_CONTROL_SHADER = SbEnums::SHADER_TYPE_TESS_CTRL,
    TESSELLATION_EVALUATION_SHADER = SbEnums::SHADER_TYPE_TESS_EVAL,
    COMPUTE_SHADER = SbEnums::SHADER_TYPE_COMPUTE,
  };
 
  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)
  MAKE_HELPHER_FUNC_SET_SHADER_PARAMETER(Matrix3)
#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)
  MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER(Matrix3)
#undef MAKE_HELPHER_FUNC_ADD_SHADER_PARAMETER
#endif //HIDDEN_FROM_DOC
 
  /*----------------------------------------------------------------------------*/
 
private:
 
  void setShaderObjectInfos(SoState* state, const SbString& shaderVersion, const SbString& shaderProfile);
 
  SourceType getSourceType();
 
  static void initClass();
  static void exitClass() ;
 
  SbBool isInternal() const;
 
  // Returns TRUE if at least one parameter is of SoShaderStateMatrixParameter type
  SbBool containStateMatrixParameters() const
  { return (m_stateMatrixParameters.getLength() != 0) ; }
 
  const 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);
 
  virtual void notify(SoNotList *list);
 
  void getHeaderFilenames( std::vector<SbString>& filenames );
 
  void setIsFixedPipeline(bool isFixedPipelineShader)
  {
    m_isFixedPipelineShader = isFixedPipelineShader;
  }
 
  bool isFixedPipeline() const
  {
    return m_isFixedPipelineShader;
  }
 
private:
 
  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;
  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 getSourceFilename(std::vector<SbString>& filenames) const;
 
  DefineMap m_defineMap;
 
  DefineMap m_defineGlobalMap;
 
  HeaderSet m_headerGlobalSet;
 
  SbStringVector m_includeSourceVector;
 
  SbStringVector m_includeFilenameVector;
 
  SbString m_directoryFound;
 
  // 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;
 
  bool m_isFixedPipelineShader;
 
  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_*/