First checkin for OpenMesh 2.0

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597

Core/IO/IOManager.cc

@@ -0,0 +1,243 @@
+/*===========================================================================*\
+ *                                                                           *
+ *                               OpenMesh                                    *
+ *        Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen         *
+ *                           www.openmesh.org                                *
+ *                                                                           *
+ *---------------------------------------------------------------------------* 
+ *                                                                           *
+ *                                License                                    *
+ *                                                                           *
+ *  This library is free software; you can redistribute it and/or modify it  *
+ *  under the terms of the GNU Lesser General Public License as published    *
+ *  by the Free Software Foundation, version 2.1.                            *
+ *                                                                           *
+ *  This library is distributed in the hope that it will be useful, but      *
+ *  WITHOUT ANY WARRANTY; without even the implied warranty of               *
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
+ *  Lesser General Public License for more details.                          *
+ *                                                                           *
+ *  You should have received a copy of the GNU Lesser General Public         *
+ *  License along with this library; if not, write to the Free Software      *
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
+ *                                                                           *
+\*===========================================================================*/
+
+
+//=============================================================================
+//
+//  Implements the OpenMesh IOManager singleton
+//
+//=============================================================================
+
+
+//== INCLUDES =================================================================
+
+
+#include <OpenMesh/Core/System/config.h>
+#include <OpenMesh/Core/IO/IOManager.hh>
+
+
+//== NAMESPACES ===============================================================
+
+
+namespace OpenMesh {
+namespace IO {
+
+
+//=============================================================================
+
+
+_IOManager_  *__IOManager_instance = 0;
+
+
+_IOManager_& IOManager()
+{
+  if (!__IOManager_instance)  __IOManager_instance = new _IOManager_();
+  return *__IOManager_instance;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+bool 
+_IOManager_::
+read(const std::string& _filename, BaseImporter& _bi, Options& _opt)
+{      
+  std::set<BaseReader*>::const_iterator it     =  reader_modules_.begin();
+  std::set<BaseReader*>::const_iterator it_end =  reader_modules_.end();
+    
+  // Try all registered modules
+  for(; it != it_end; ++it)
+    if ((*it)->can_u_read(_filename))
+    {
+      _bi.prepare();
+      bool ok = (*it)->read(_filename, _bi, _opt);
+      _bi.finish();
+      return ok;
+    }
+  
+  // All modules failed to read
+  return false;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+bool
+_IOManager_::
+write(const std::string& _filename, BaseExporter& _be, Options _opt)
+{
+  std::set<BaseWriter*>::const_iterator it     = writer_modules_.begin();
+  std::set<BaseWriter*>::const_iterator it_end = writer_modules_.end();
+  
+  if ( it == it_end )
+  {
+    omerr() << "[OpenMesh::IO::_IOManager_] No writing modules available!\n";
+    return false;
+  }
+
+  // Try all registered modules
+  for(; it != it_end; ++it)
+  {
+    if ((*it)->can_u_write(_filename))
+    {
+      return (*it)->write(_filename, _be, _opt); 
+    }
+  }
+  
+  // All modules failed to save
+  return false;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+bool 
+_IOManager_::
+can_read( const std::string& _format ) const
+{
+  std::set<BaseReader*>::const_iterator it     = reader_modules_.begin();
+  std::set<BaseReader*>::const_iterator it_end = reader_modules_.end();
+  std::string filename = "dummy." + _format;
+  
+  for(; it != it_end; ++it)
+    if ((*it)->can_u_read(filename))
+      return true;
+  
+  return false;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+bool
+_IOManager_::
+can_write( const std::string& _format ) const
+{
+  std::set<BaseWriter*>::const_iterator it     = writer_modules_.begin();
+  std::set<BaseWriter*>::const_iterator it_end = writer_modules_.end();
+  std::string filename = "dummy." + _format;
+    
+  // Try all registered modules
+  for(; it != it_end; ++it)
+    if ((*it)->can_u_write(filename))
+      return true;
+    
+  return false;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+const BaseWriter*
+_IOManager_::
+find_writer(const std::string& _format)
+{
+  using std::string;
+  
+  string::size_type dot = _format.rfind('.');
+
+  string ext;
+  if (dot == string::npos)
+    ext = _format;
+  else
+    ext = _format.substr(dot+1,_format.length()-(dot+1));
+  
+  std::set<BaseWriter*>::const_iterator it     = writer_modules_.begin();
+  std::set<BaseWriter*>::const_iterator it_end = writer_modules_.end();
+  std::string filename = "dummy." + ext;
+  
+  // Try all registered modules
+  for(; it != it_end; ++it)
+    if ((*it)->can_u_write(filename))
+      return *it;
+
+  return NULL;
+}
+  
+
+//-----------------------------------------------------------------------------
+
+
+void
+_IOManager_::
+update_read_filters()
+{
+  std::set<BaseReader*>::const_iterator it     = reader_modules_.begin(),
+                                        it_end = reader_modules_.end();
+  std::string s, all, filters;
+  
+  for(; it != it_end; ++it)
+  {
+    filters += (*it)->get_description() + " (";
+    
+    std::istringstream iss((*it)->get_extensions());
+    while (iss && !iss.eof() && (iss >> s))
+    { s = " *." + s; filters += s; all += s; }
+    
+    filters += " );;";
+  }
+
+  all = "All files ( " + all + " );;";
+  
+  read_filters_ = all + filters;
+}
+
+
+//-----------------------------------------------------------------------------
+
+
+void
+_IOManager_::
+update_write_filters()
+{
+  std::set<BaseWriter*>::const_iterator it     = writer_modules_.begin(),
+                                        it_end = writer_modules_.end();
+  std::string s, all, filters;
+    
+  for(; it != it_end; ++it)
+  {
+    filters += (*it)->get_description() + " (";
+
+    std::istringstream iss((*it)->get_extensions());
+    while (iss && !iss.eof() && (iss >> s))
+    { s = " *." + s; filters += s; all += s; }
+
+    filters += " );;";
+  }
+  all = "All files ( " + all + " );;";
+
+  write_filters_ = all + filters;
+}  
+
+
+//=============================================================================
+} // namespace IO
+} // namespace OpenMesh
+//=============================================================================