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// File: BRepMesh_DiscretFactory.cxx
// Created: Thu Apr 10 13:32:00 2008
// Author: Peter KURNEV <pkv@irinox>
#include <BRepMesh_DiscretFactory.ixx>
#include <OSD_SharedLibrary.hxx>
#include <OSD_Function.hxx>
#include <BRepMesh_IncrementalMesh.hxx>
#include <BRepMesh_PDiscretRoot.hxx>
namespace
{
//! Embedded triangulation tool(s)
static TCollection_AsciiString THE_FAST_DISCRET_MESH ("FastDiscret");
//! Generate system-dependent name for dynamic library
//! (add standard prefixes and postfixes)
static void MakeLibName (const TCollection_AsciiString& theDefaultName,
TCollection_AsciiString& theLibName)
{
theLibName = "";
#ifndef WNT
theLibName += "lib";
#endif
theLibName += theDefaultName;
#ifdef WNT
theLibName += ".dll";
#elif __APPLE__
theLibName += ".dylib";
#elif defined (HPUX) || defined(_hpux)
theLibName += ".sl";
#else
theLibName += ".so";
#endif
}
};
//=======================================================================
//function : BRepMesh_DiscretFactory
//purpose :
//=======================================================================
BRepMesh_DiscretFactory::BRepMesh_DiscretFactory()
: myPluginEntry (NULL),
myErrorStatus (BRepMesh_FE_NOERROR),
myDefaultName (THE_FAST_DISCRET_MESH),
myFunctionName ("DISCRETALGO")
{
// register built-in meshing algorithms
myNames.Add (THE_FAST_DISCRET_MESH);
}
//=======================================================================
//function : ~
//purpose :
//=======================================================================
BRepMesh_DiscretFactory::~BRepMesh_DiscretFactory()
{
Clear();
}
//=======================================================================
//function : ~
//purpose :
//=======================================================================
void BRepMesh_DiscretFactory::Clear()
{
// what should we do here? Unload dynamic libraries and reset plugins list?
}
//=======================================================================
//function : Get
//purpose :
//=======================================================================
BRepMesh_DiscretFactory& BRepMesh_DiscretFactory::Get()
{
#ifdef __BORLANDC__
static BRepMesh_DiscretFactory* sFactory = new BRepMesh_DiscretFactory;
return *sFactory;
#else
//! global factory instance
static BRepMesh_DiscretFactory THE_GLOBAL_FACTORY;
return THE_GLOBAL_FACTORY;
#endif
}
//=======================================================================
//function : ErrorStatus
//purpose :
//=======================================================================
BRepMesh_FactoryError BRepMesh_DiscretFactory::ErrorStatus() const
{
return myErrorStatus;
}
//=======================================================================
//function : Names
//purpose :
//=======================================================================
const TColStd_MapOfAsciiString& BRepMesh_DiscretFactory::Names() const
{
return myNames;
}
//=======================================================================
//function : SetDefaultName
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_DiscretFactory::SetDefaultName (const TCollection_AsciiString& theName)
{
return SetDefault (theName, myFunctionName);
}
//=======================================================================
//function : DefaultName
//purpose :
//=======================================================================
const TCollection_AsciiString& BRepMesh_DiscretFactory::DefaultName() const
{
return myDefaultName;
}
//=======================================================================
//function : SetFunctionName
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_DiscretFactory::SetFunctionName (const TCollection_AsciiString& theFuncName)
{
return SetDefault (myDefaultName, theFuncName);
}
//=======================================================================
//function : FunctionName
//purpose :
//=======================================================================
const TCollection_AsciiString& BRepMesh_DiscretFactory::FunctionName() const
{
return myFunctionName;
}
//=======================================================================
//function : SetDefault
//purpose :
//=======================================================================
Standard_Boolean BRepMesh_DiscretFactory::SetDefault (const TCollection_AsciiString& theName,
const TCollection_AsciiString& theFuncName)
{
myErrorStatus = BRepMesh_FE_NOERROR;
if (theName == THE_FAST_DISCRET_MESH)
{
// built-in, nothing to do
myPluginEntry = NULL;
myDefaultName = theName;
myFunctionName = theFuncName;
return Standard_True;
}
else if (theName == myDefaultName && theFuncName == myFunctionName)
{
// already active
return myPluginEntry != NULL;
}
TCollection_AsciiString aMeshAlgoId = theName + "_" + theFuncName;
BRepMesh_PluginEntryType aFunc = NULL;
if (myFactoryMethods.IsBound (aMeshAlgoId))
{
// retrieve from cache
aFunc = (BRepMesh_PluginEntryType )myFactoryMethods (aMeshAlgoId);
}
else
{
TCollection_AsciiString aLibName;
MakeLibName (theName, aLibName);
OSD_SharedLibrary aSL (aLibName.ToCString());
if (!aSL.DlOpen (OSD_RTLD_LAZY))
{
// library is not found
myErrorStatus = BRepMesh_FE_LIBRARYNOTFOUND;
return Standard_False;
}
// retrieve the function from plugin
aFunc = (BRepMesh_PluginEntryType )aSL.DlSymb (theFuncName.ToCString());
myFactoryMethods.Bind (aMeshAlgoId, (OSD_Function )aFunc);
}
if (aFunc == NULL)
{
// function is not found - invalid plugin?
myErrorStatus = BRepMesh_FE_FUNCTIONNOTFOUND;
return Standard_False;
}
// try to create dummy tool
BRepMesh_PDiscretRoot anInstancePtr = NULL;
Standard_Integer anErr = aFunc (TopoDS_Shape(), 0.001, 0.1, anInstancePtr);
if (anErr != 0 || anInstancePtr == NULL)
{
// can not create the algo specified
myErrorStatus = BRepMesh_FE_CANNOTCREATEALGO;
delete anInstancePtr;
return Standard_False;
}
delete anInstancePtr;
// if all checks done - switch to this tool
myPluginEntry = aFunc;
myDefaultName = theName;
myFunctionName = theFuncName;
myNames.Add (theName);
return Standard_True;
}
//=======================================================================
//function : Discret
//purpose :
//=======================================================================
Handle(BRepMesh_DiscretRoot) BRepMesh_DiscretFactory
::Discret (const TopoDS_Shape& theShape,
const Standard_Real theDeflection,
const Standard_Real theAngle)
{
Handle(BRepMesh_DiscretRoot) aDiscretRoot;
BRepMesh_PDiscretRoot anInstancePtr = NULL;
if (myPluginEntry != NULL)
{
// use plugin
Standard_Integer anErr = myPluginEntry (theShape, theDeflection, theAngle, anInstancePtr);
if (anErr != 0 || anInstancePtr == NULL)
{
// can not create the algo specified - should never happens here
myErrorStatus = BRepMesh_FE_CANNOTCREATEALGO;
return aDiscretRoot;
}
}
else //if (myDefaultName == THE_FAST_DISCRET_MESH)
{
// use built-in
BRepMesh_IncrementalMesh::Discret (theShape, theDeflection, theAngle, anInstancePtr);
}
// cover with handle
aDiscretRoot = anInstancePtr;
// return the handle
return aDiscretRoot;
}
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