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OMReader.hh

00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *      Copyright (C) 2001-2005 by Computer Graphics Group, RWTH Aachen      *
00005  *                           www.openmesh.org                                *
00006  *                                                                           *
00007  *---------------------------------------------------------------------------* 
00008  *                                                                           *
00009  *                                License                                    *
00010  *                                                                           *
00011  *  This library is free software; you can redistribute it and/or modify it  *
00012  *  under the terms of the GNU Library General Public License as published   *
00013  *  by the Free Software Foundation, version 2.                              *
00014  *                                                                           *
00015  *  This library is distributed in the hope that it will be useful, but      *
00016  *  WITHOUT ANY WARRANTY; without even the implied warranty of               *
00017  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU        *
00018  *  Library General Public License for more details.                         *
00019  *                                                                           *
00020  *  You should have received a copy of the GNU Library General Public        *
00021  *  License along with this library; if not, write to the Free Software      *
00022  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                *
00023  *                                                                           *
00024 \*===========================================================================*/
00025 
00026 
00027 //=============================================================================
00028 //
00029 //  Implements a reader module for OFF files
00030 //
00031 //=============================================================================
00032 
00033 
00034 #ifndef __OMREADER_HH__
00035 #define __OMREADER_HH__
00036 
00037 
00038 //=== INCLUDES ================================================================
00039 
00040 // OpenMesh
00041 #include <OpenMesh/Core/System/config.hh>
00042 #include <OpenMesh/Core/Utils/SingletonT.hh>
00043 #include <OpenMesh/Core/IO/OMFormat.hh>
00044 #include <OpenMesh/Core/IO/IOManager.hh>
00045 #include <OpenMesh/Core/IO/importer/BaseImporter.hh>
00046 #include <OpenMesh/Core/IO/reader/BaseReader.hh>
00047 
00048 // STD C++
00049 #include <iostream>
00050 #include <string>
00051 
00052 
00053 //== NAMESPACES ===============================================================
00054 
00055 
00056 namespace OpenMesh {
00057 namespace IO {
00058 
00059 
00060 //== IMPLEMENTATION ===========================================================
00061 
00062 
00067 class _OMReader_ : public BaseReader
00068 {
00069 public:
00070 
00071   _OMReader_();
00072   virtual ~_OMReader_() { }
00073 
00074   std::string get_description() const { return "OpenMesh File Format"; }
00075   std::string get_extensions()  const { return "om"; }
00076   std::string get_magic()       const { return "OM"; }
00077    
00078   bool read(const std::string& _filename, 
00079             BaseImporter& _bi, 
00080             Options& _opt );
00081 
00082   virtual bool can_u_read(const std::string& _filename) const;
00083   virtual bool can_u_read(std::istream& _is) const;
00084 
00085   
00086 private:
00087 
00088   bool supports( const OMFormat::uint8 version ) const;
00089 
00090   bool read(std::istream& _is, BaseImporter& _bi, Options& _opt );
00091   bool read_ascii(std::istream& _is, BaseImporter& _bi, Options& _opt);
00092   bool read_binary(std::istream& _is, BaseImporter& _bi, Options& _opt);
00093 
00094   typedef OMFormat::Header              Header;
00095   typedef OMFormat::Chunk::Header       ChunkHeader;
00096   typedef OMFormat::Chunk::PropertyName PropertyName;
00097 
00098   // initialized/updated by read_binary*/read_ascii*
00099   size_t                  bytes_;
00100   Header                  header_;
00101   ChunkHeader             chunk_header_;
00102   PropertyName            property_name_;
00103   BaseImporter::VHandles  vhandles_;
00104 
00105 
00106   bool read_binary_vertex_chunk(   std::istream      &_is, 
00107                                    BaseImporter      &_bi, 
00108                                    Options           &_opt,
00109                                    bool              _swap);
00110 
00111   bool read_binary_face_chunk(     std::istream      &_is, 
00112                                    BaseImporter      &_bi, 
00113                                    Options           &_opt,
00114                                    bool              _swap);
00115 
00116   bool read_binary_edge_chunk(     std::istream      &_is, 
00117                                    BaseImporter      &_bi, 
00118                                    Options           &_opt,
00119                                    bool              _swap);
00120 
00121   bool read_binary_halfedge_chunk( std::istream      &_is, 
00122                                    BaseImporter      &_bi, 
00123                                    Options           &_opt,
00124                                    bool              _swap);
00125 
00126   bool read_binary_mesh_chunk(     std::istream      &_is, 
00127                                    BaseImporter      &_bi, 
00128                                    Options           &_opt,
00129                                    bool              _swap);
00130 
00131   size_t restore_binary_custom_data( std::istream& _is, 
00132                                      BaseProperty* _bp,
00133                                      size_t _n_elem, 
00134                                      bool _swap);
00135 
00136 };
00137 
00138 
00139 //== TYPE DEFINITION ==========================================================
00140 
00141 
00143 extern _OMReader_  __OMReaderInstance;
00144 _OMReader_&  OMReader();
00145 
00146 
00147 //=============================================================================
00148 } // namespace IO
00149 } // namespace OpenMesh
00150 //=============================================================================
00151 #endif
00152 //=============================================================================

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