Data Exchange, DE Wrapper - Reorganisation of plugin system for Configuration Nodes (#696)

- Added Register and UnRegister methods to DE_ConfigurationNode for managing bindings with DE_Wrapper.
- Introduced DE_MultiPluginHolder to facilitate registration of multiple configuration nodes simultaneously.
- Created new plugin factory functions for various configuration nodes (DEBREP, DEXCAF, DEGLTF, DEIGES, DEOBJ, DEPLY, DESTEP, DESTL, DEVRML) to streamline their registration with DE_Wrapper.
- Removed unnecessary DE_PluginHolder instances from individual configuration node implementations.
- Updated CMake files to include newly created source files for each configuration node.
- Implemented singleton patterns in draw commands to ensure plugins are registered only once during initialization.

src/DataExchange/TKDE/DE/DE_ConfigurationNode.cxx

@@ -139,3 +139,17 @@ bool DE_ConfigurationNode::CheckContent(const Handle(NCollection_Buffer)& theBuf
   (void)theBuffer;
   return false;
 }
+
+//=================================================================================================
+
+void DE_ConfigurationNode::Register(const Handle(DE_Wrapper)& theWrapper) const
+{
+  theWrapper->Bind(this);
+}
+
+//=================================================================================================
+
+void DE_ConfigurationNode::UnRegister(const Handle(DE_Wrapper)& theWrapper) const
+{
+  theWrapper->UnBind(this);
+}

src/DataExchange/TKDE/DE/DE_ConfigurationNode.hxx

@@ -18,6 +18,7 @@
 
 class DE_ConfigurationContext;
 class DE_Provider;
+class DE_Wrapper;
 class NCollection_Buffer;
 
 //! Base class to work with CAD transfer properties.
@@ -154,6 +155,16 @@ public:
                                     //!< unit is unknown, default 1.0 (MM)
   } GlobalParameters;
 
+public:
+
+  //! Registers configuration node with the specified wrapper
+  //! @param[in] theWrapper wrapper to register with
+  Standard_EXPORT virtual void Register(const Handle(DE_Wrapper)& theWrapper) const;
+
+  //! Unregisters configuration node from the specified wrapper
+  //! @param[in] theWrapper wrapper to unregister from
+  Standard_EXPORT virtual void UnRegister(const Handle(DE_Wrapper)& theWrapper) const;
+
 private:
   Standard_Boolean myIsEnabled; //!< Flag to use a current provider for Read or Write process via DE_Wrapper
   // clang-format on

src/DataExchange/TKDE/DE/DE_PluginHolder.hxx

@@ -15,6 +15,7 @@
 #define _DE_PluginHolder_HeaderFile
 
 #include <DE_Wrapper.hxx>
+#include <tuple>
 
 //! Base class to work with DE_Wrapper global registration of components.
 //! Control life-time of current configuration node.
@@ -29,17 +30,80 @@ public:
   {
     Standard_Mutex::Sentry aLock(DE_Wrapper::GlobalLoadMutex());
     myInternalConfiguration = new TheConfType;
-    DE_Wrapper::GlobalWrapper()->Bind(myInternalConfiguration);
+    myInternalConfiguration->Register(DE_Wrapper::GlobalWrapper());
   }
 
   ~DE_PluginHolder()
   {
     Standard_Mutex::Sentry aLock(DE_Wrapper::GlobalLoadMutex());
-    DE_Wrapper::GlobalWrapper()->UnBind(myInternalConfiguration);
+    myInternalConfiguration->UnRegister(DE_Wrapper::GlobalWrapper());
   }
 
 private:
   Handle(TheConfType) myInternalConfiguration; //!< Wrapped object
 };
 
+//! Helper class for variadic plugin registration.
+//! Allows registration of multiple configuration node types simultaneously.
+template <typename... TheConfTypes>
+class DE_MultiPluginHolder
+{
+public:
+  DE_MultiPluginHolder()
+      : myHolders{}
+  {
+  }
+
+private:
+  std::tuple<DE_PluginHolder<TheConfTypes>...> myHolders; //!< Tuple of individual plugin holders
+};
+
+//! Macro to define plugin factory function for DE_Wrapper configuration nodes.
+//! @param[in] theNodeType - first configuration node class to instantiate
+//! @param[in] ... - additional configuration node classes to instantiate (optional)
+//! Needs to be called after loading of the library to register configuration nodes.
+//!
+//! Example of usage:
+//! @code
+//! // Inside implementation of the configuration node source file:
+//! DEPLUGIN(DESTEP_ConfigurationNode)
+//!
+//! // For multiple node types:
+//! DEPLUGIN(DESTEP_ConfigurationNode, DEIGES_ConfigurationNode, DEVRML_ConfigurationNode)
+//! @endcode
+//!
+//! After loading of the library TKDESTEP:
+//! @code
+//! OSD_SharedLibrary aSharedLibrary("libTKDESTEP.so");
+//! if (!aSharedLibrary.DlOpen(OSD_RTLD_LAZY))
+//! {
+//!   // Error handling
+//!   return;
+//! }
+//!
+//! typedef void (*PluginFactoryFunc)();
+//! PluginFactoryFunc aFunc = (PluginFactoryFunc)aSharedLibrary.DlSymb("PLUGINFACTORY");
+//! if (aFunc == NULL)
+//! {
+//!   // Error handling
+//!   return;
+//! }
+//!
+//! aFunc(); // Call factory function to register configuration nodes
+//! @endcode
+//!
+//! Will create instances of all specified configuration nodes and set them to DE_Wrapper global
+//! configuration.
+//!
+//! Note: if OCCT_NO_PLUGINS is defined, macro does nothing.
+#ifdef OCCT_NO_PLUGINS
+  #define DEPLUGIN(theNodeType, ...)
+#else
+  #define DEPLUGIN(theNodeType, ...)                                                               \
+    extern "C" Standard_EXPORT void PLUGINFACTORY()                                                \
+    {                                                                                              \
+      static DE_MultiPluginHolder<theNodeType, ##__VA_ARGS__> aMultiHolder;                        \
+    }
+#endif
+
 #endif // _DE_PluginHolder_HeaderFile

src/DataExchange/TKDE/DE/DE_ShapeFixConfigurationNode.cxx

@@ -14,7 +14,6 @@
 #include <DE_ShapeFixConfigurationNode.hxx>
 
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <DE_Wrapper.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DE_ShapeFixConfigurationNode, DE_ConfigurationNode)

src/DataExchange/TKDECascade/DEBREP/DEBREP_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEBREP_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEBREP_ConfigurationNode, DE_ConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEBREP_ConfigurationNode> THE_OCCT_BREP_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDECascade/DEXCAF/DEXCAF_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEXCAF_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEXCAF_ConfigurationNode, DE_ConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEXCAF_ConfigurationNode> THE_OCCT_XCAF_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDECascade/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDECascade_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDECascade_FILES
   EXTERNLIB
   PACKAGES
+  TKDECascade.cxx
 )

src/DataExchange/TKDECascade/TKDECascade.cxx

@@ -0,0 +1,21 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEBREP_ConfigurationNode.hxx>
+#include <DEXCAF_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register TKDECascade configuration nodes.
+//! Call PLUGINFACTORY() to register both DEBREP_ConfigurationNode and DEXCAF_ConfigurationNode
+//! with the global DE_Wrapper.
+DEPLUGIN(DEBREP_ConfigurationNode, DEXCAF_ConfigurationNode)

src/DataExchange/TKDEGLTF/DEGLTF/DEGLTF_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEGLTF_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEGLTF_ConfigurationNode, DE_ConfigurationNode)
 
@@ -27,8 +26,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEGLTF_ConfigurationNode> THE_OCCT_GLTF_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDEGLTF/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDEGLTF_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDEGLTF_FILES
   EXTERNLIB
   PACKAGES
+  TKDEGLTF.cxx
 )

src/DataExchange/TKDEGLTF/TKDEGLTF.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEGLTF_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DEGLTF configuration node.
+//! Call PLUGINFACTORY() to register the DEGLTF_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DEGLTF_ConfigurationNode)

src/DataExchange/TKDEIGES/DEIGES/DEIGES_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEIGES_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEIGES_ConfigurationNode, DE_ShapeFixConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEIGES_ConfigurationNode> THE_OCCT_IGES_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDEIGES/FILES.cmake

@@ -5,4 +5,5 @@ set(OCCT_TKDEIGES_FILES
   EXTERNLIB
   PACKAGES
   TKDEIGES_pch.hxx
+  TKDEIGES.cxx
 )

src/DataExchange/TKDEIGES/TKDEIGES.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEIGES_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DEIGES configuration node.
+//! Call PLUGINFACTORY() to register the DEIGES_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DEIGES_ConfigurationNode)

src/DataExchange/TKDEOBJ/DEOBJ/DEOBJ_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEOBJ_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEOBJ_ConfigurationNode, DE_ConfigurationNode)
 
@@ -27,8 +26,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEOBJ_ConfigurationNode> THE_OCCT_OBJ_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDEOBJ/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDEOBJ_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDEOBJ_FILES
   EXTERNLIB
   PACKAGES
+  TKDEOBJ.cxx
 )

src/DataExchange/TKDEOBJ/TKDEOBJ.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEOBJ_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DEOBJ configuration node.
+//! Call PLUGINFACTORY() to register the DEOBJ_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DEOBJ_ConfigurationNode)

src/DataExchange/TKDEPLY/DEPLY/DEPLY_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEPLY_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEPLY_ConfigurationNode, DE_ConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEPLY_ConfigurationNode> THE_OCCT_PLY_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDEPLY/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDEPLY_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDEPLY_FILES
   EXTERNLIB
   PACKAGES
+  TKDEPLY.cxx
 )

src/DataExchange/TKDEPLY/TKDEPLY.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEPLY_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DEPLY configuration node.
+//! Call PLUGINFACTORY() to register the DEPLY_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DEPLY_ConfigurationNode)

src/DataExchange/TKDESTEP/DESTEP/DESTEP_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DESTEP_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DESTEP_ConfigurationNode, DE_ShapeFixConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DESTEP_ConfigurationNode> THE_OCCT_STEP_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDESTEP/FILES.cmake

@@ -5,4 +5,5 @@ set(OCCT_TKDESTEP_FILES
   EXTERNLIB
   PACKAGES
   TKDESTEP_pch.hxx
+  TKDESTEP.cxx
 )

src/DataExchange/TKDESTEP/TKDESTEP.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DESTEP_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DESTEP configuration node.
+//! Call PLUGINFACTORY() to register the DESTEP_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DESTEP_ConfigurationNode)

src/DataExchange/TKDESTL/DESTL/DESTL_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DESTL_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 #include <NCollection_Buffer.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DESTL_ConfigurationNode, DE_ConfigurationNode)
@@ -28,8 +27,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DESTL_ConfigurationNode> THE_OCCT_STL_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDESTL/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDESTL_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDESTL_FILES
   EXTERNLIB
   PACKAGES
+  TKDESTL.cxx
 )

src/DataExchange/TKDESTL/TKDESTL.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DESTL_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DESTL configuration node.
+//! Call PLUGINFACTORY() to register the DESTL_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DESTL_ConfigurationNode)

src/DataExchange/TKDEVRML/DEVRML/DEVRML_ConfigurationNode.cxx

@@ -15,7 +15,6 @@
 
 #include <DEVRML_Provider.hxx>
 #include <DE_ConfigurationContext.hxx>
-#include <DE_PluginHolder.hxx>
 
 IMPLEMENT_STANDARD_RTTIEXT(DEVRML_ConfigurationNode, DE_ConfigurationNode)
 
@@ -27,8 +26,6 @@ static const TCollection_AsciiString& THE_CONFIGURATION_SCOPE()
   return aScope;
 }
 
-// Wrapper to auto-load DE component
-DE_PluginHolder<DEVRML_ConfigurationNode> THE_OCCT_VRML_COMPONENT_PLUGIN;
 } // namespace
 
 //=================================================================================================

src/DataExchange/TKDEVRML/FILES.cmake

@@ -4,4 +4,5 @@ set(OCCT_TKDEVRML_FILES_LOCATION "${CMAKE_CURRENT_LIST_DIR}")
 set(OCCT_TKDEVRML_FILES
   EXTERNLIB
   PACKAGES
+  TKDEVRML.cxx
 )

src/DataExchange/TKDEVRML/TKDEVRML.cxx

@@ -0,0 +1,19 @@
+// Copyright (c) 2025 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
+
+#include <DEVRML_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
+
+//! Plugin factory function to register DEVRML configuration node.
+//! Call PLUGINFACTORY() to register the DEVRML_ConfigurationNode with the global DE_Wrapper.
+DEPLUGIN(DEVRML_ConfigurationNode)

src/Draw/TKXSDRAWDE/XSDRAWDE/XSDRAWDE.cxx

@@ -20,6 +20,8 @@
 #include <DE_Provider.hxx>
 #include <DE_Wrapper.hxx>
 #include <DEBREP_ConfigurationNode.hxx>
+#include <DEXCAF_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -31,6 +33,16 @@
 #include <XSControl_WorkSession.hxx>
 #include <XSDRAW.hxx>
 
+namespace
+{
+// Singleton to ensure DEBREP and DEXCAF plugins are registered only once
+void DECascadeSingleton()
+{
+  static DE_MultiPluginHolder<DEBREP_ConfigurationNode, DEXCAF_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 static Standard_Integer DumpConfiguration(Draw_Interpretor& theDI,
@@ -364,6 +376,9 @@ void XSDRAWDE::Factory(Draw_Interpretor& theDI)
   }
   aIsActivated = Standard_True;
 
+  //! Ensure DEBREP and DEXCAF plugins are registered
+  DECascadeSingleton();
+
   Standard_CString aGroup = "XDE translation commands";
   theDI.Add("DumpConfiguration",
             "DumpConfiguration [-path <path>] [-recursive {on|off}] [-format fmt1 fmt2 ...] "
@@ -428,10 +443,6 @@ void XSDRAWDE::Factory(Draw_Interpretor& theDI)
 
   // Load XSDRAW session for pilot activation
   XSDRAW::LoadDraw(theDI);
-
-  // Workaround to force load TKDECascade lib
-  DEBREP_ConfigurationNode aTmpObj;
-  (void)aTmpObj;
 }
 
 // Declare entry point PLUGINFACTORY

src/Draw/TKXSDRAWGLTF/XSDRAWGLTF/XSDRAWGLTF.cxx

@@ -16,6 +16,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DEGLTF_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -30,6 +32,16 @@
 #include <XSControl_WorkSession.hxx>
 #include <XSDRAW.hxx>
 
+namespace
+{
+// Singleton to ensure DEGLTF plugin is registered only once
+void DEGLTFSingleton()
+{
+  static DE_PluginHolder<DEGLTF_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=============================================================================
 // function : parseNameFormat
 // purpose  : Parse RWMesh_NameFormat enumeration
@@ -509,6 +521,9 @@ void XSDRAWGLTF::Factory(Draw_Interpretor& theDI)
   }
   aIsActivated = Standard_True;
 
+  //! Ensure DEGLTF plugin is registered
+  DEGLTFSingleton();
+
   const char* aGroup = "XSTEP-STL/VRML"; // Step transfer file commands
   theDI.Add("ReadGltf",
             "ReadGltf Doc file [-parallel {on|off}] [-listExternalFiles] [-noCreateDoc] "

src/Draw/TKXSDRAWIGES/XSDRAWIGES/XSDRAWIGES.cxx

@@ -17,6 +17,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DEIGES_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <DrawTrSurf.hxx>
 #include <Draw_Interpretor.hxx>
@@ -1108,6 +1110,16 @@ static Standard_Integer WriteIges(Draw_Interpretor& theDI,
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DEIGES plugin is registered only once
+void DEIGESSingleton()
+{
+  static DE_PluginHolder<DEIGES_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWIGES::Factory(Draw_Interpretor& theDI)
@@ -1121,6 +1133,9 @@ void XSDRAWIGES::Factory(Draw_Interpretor& theDI)
 
   IGESControl_Controller::Init();
 
+  //! Ensure DEIGES plugin is registered
+  DEIGESSingleton();
+
   const char* aGroup = "DE: IGES";
 
   theDI.Add("tplosttrim",

src/Draw/TKXSDRAWOBJ/XSDRAWOBJ/XSDRAWOBJ.cxx

@@ -17,6 +17,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DEOBJ_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -335,6 +337,16 @@ static Standard_Integer WriteObj(Draw_Interpretor& theDI,
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DEOBJ plugin is registered only once
+void DEOBJSingleton()
+{
+  static DE_PluginHolder<DEOBJ_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWOBJ::Factory(Draw_Interpretor& theDI)
@@ -346,6 +358,9 @@ void XSDRAWOBJ::Factory(Draw_Interpretor& theDI)
   }
   aIsActivated = Standard_True;
 
+  //! Ensure DEOBJ plugin is registered
+  DEOBJSingleton();
+
   const char* aGroup = "XSTEP-STL/VRML"; // Step transfer file commands
   theDI.Add(
     "ReadObj",

src/Draw/TKXSDRAWPLY/XSDRAWPLY/XSDRAWPLY.cxx

@@ -18,6 +18,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DEPLY_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -295,6 +297,16 @@ static Standard_Integer WritePly(Draw_Interpretor& theDI,
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DEPLY plugin is registered only once
+void DEPLYSingleton()
+{
+  static DE_PluginHolder<DEPLY_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWPLY::Factory(Draw_Interpretor& theDI)
@@ -306,6 +318,9 @@ void XSDRAWPLY::Factory(Draw_Interpretor& theDI)
   }
   aIsActivated = Standard_True;
 
+  //! Ensure DEPLY plugin is registered
+  DEPLYSingleton();
+
   const char* aGroup = "XSTEP-STL/VRML"; // Step transfer file commands
   // XSDRAW::LoadDraw(theCommands);
   theDI.Add("WritePly",

src/Draw/TKXSDRAWSTEP/XSDRAWSTEP/XSDRAWSTEP.cxx

@@ -17,6 +17,8 @@
 #include <DDF.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DESTEP_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -1092,6 +1094,16 @@ static Standard_Integer WriteStep(Draw_Interpretor& theDI,
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DESTEP plugin is registered only once
+void DESTEPSingleton()
+{
+  static DE_PluginHolder<DESTEP_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWSTEP::Factory(Draw_Interpretor& theDI)
@@ -1104,6 +1116,9 @@ void XSDRAWSTEP::Factory(Draw_Interpretor& theDI)
   STEPCAFControl_Controller::Init();
   aIsActivated = Standard_True;
 
+  //! Ensure DESTEP plugin is registered
+  DESTEPSingleton();
+
   const char* aGroup = "DE: STEP"; // Step transfer file commands
   theDI.Add("stepwrite", "stepwrite mode[0-4 afsmw] shape", __FILE__, stepwrite, aGroup);
   theDI.Add("testwritestep",

src/Draw/TKXSDRAWSTL/XSDRAWSTL/XSDRAWSTL.cxx

@@ -18,6 +18,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DESTL_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -1233,6 +1235,16 @@ static Standard_Integer meshinfo(Draw_Interpretor& theDI,
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DESTL plugin is registered only once
+void DESTLSingleton()
+{
+  static DE_PluginHolder<DESTL_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWSTL::Factory(Draw_Interpretor& theDI)
@@ -1244,6 +1256,9 @@ void XSDRAWSTL::Factory(Draw_Interpretor& theDI)
   }
   aIsActivated = Standard_True;
 
+  //! Ensure DESTL plugin is registered
+  DESTLSingleton();
+
   const char* aGroup = "XSTEP-STL/VRML"; // Step transfer file commands
 
   theDI.Add("writestl",

src/Draw/TKXSDRAWVRML/XSDRAWVRML/XSDRAWVRML.cxx

@@ -16,6 +16,8 @@
 #include <DBRep.hxx>
 #include <DDocStd.hxx>
 #include <DDocStd_DrawDocument.hxx>
+#include <DEVRML_ConfigurationNode.hxx>
+#include <DE_PluginHolder.hxx>
 #include <Draw.hxx>
 #include <Draw_Interpretor.hxx>
 #include <Draw_PluginMacro.hxx>
@@ -408,6 +410,16 @@ static Standard_Integer writevrml(Draw_Interpretor& di, Standard_Integer argc, c
   return 0;
 }
 
+namespace
+{
+// Singleton to ensure DEVRML plugin is registered only once
+void DEVRMLSingleton()
+{
+  static DE_PluginHolder<DEVRML_ConfigurationNode> aHolder;
+  (void)aHolder;
+}
+} // namespace
+
 //=================================================================================================
 
 void XSDRAWVRML::Factory(Draw_Interpretor& theDI)
@@ -419,6 +431,9 @@ void XSDRAWVRML::Factory(Draw_Interpretor& theDI)
   }
   anInitActor = Standard_True;
 
+  //! Ensure DEVRML plugin is registered
+  DEVRMLSingleton();
+
   Standard_CString aGroup = "XDE translation commands";
   theDI.Add(
     "ReadVrml",