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OMReader.hh

00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *        Copyright (C) 2003 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.h>
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_() { IOManager::Instance().register_module(this); }
00072 
00073   virtual ~_OMReader_() { }
00074 
00075   std::string get_description() const { return "OpenMesh File Format"; }
00076   std::string get_extensions()  const { return "om"; }
00077   std::string get_magic()       const { return "OM"; }
00078    
00079   bool read(const std::string& _filename, 
00080             BaseImporter& _bi, 
00081             Options& _opt );
00082 
00083   virtual bool can_u_read(const std::string& _filename) const;
00084   virtual bool can_u_read(std::istream& _is) const;
00085 
00086   
00087 private:
00088 
00089   bool supports( const OMFormat::uint8 version ) const;
00090 
00091   bool read(std::istream& _is, BaseImporter& _bi, Options& _opt ) const;
00092   bool read_ascii(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
00093   bool read_binary(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
00094 
00095   typedef OMFormat::Header              Header;
00096   typedef OMFormat::Chunk::Header       ChunkHeader;
00097   typedef OMFormat::Chunk::PropertyName PropertyName;
00098 
00099   // initialized/updated by read_binary*/read_ascii*
00100   mutable size_t       bytes_;
00101   mutable Header       header_;
00102   mutable ChunkHeader  chunk_header_;
00103   mutable PropertyName property_name_;
00104 
00105   bool read_binary_vertex_chunk(   std::istream      &_is, 
00106                                    BaseImporter      &_bi, 
00107                                    Options           &_opt,
00108                                    bool              _swap) const;
00109 
00110   bool read_binary_face_chunk(     std::istream      &_is, 
00111                                    BaseImporter      &_bi, 
00112                                    Options           &_opt,
00113                                    bool              _swap) const;
00114 
00115   bool read_binary_edge_chunk(     std::istream      &_is, 
00116                                    BaseImporter      &_bi, 
00117                                    Options           &_opt,
00118                                    bool              _swap) const;
00119 
00120   bool read_binary_halfedge_chunk( std::istream      &_is, 
00121                                    BaseImporter      &_bi, 
00122                                    Options           &_opt,
00123                                    bool              _swap) const;
00124 
00125   bool read_binary_mesh_chunk(     std::istream      &_is, 
00126                                    BaseImporter      &_bi, 
00127                                    Options           &_opt,
00128                                    bool              _swap) const;
00129 
00130   size_t restore_binary_custom_data( std::istream& _is, 
00131                                      BaseProperty* _bp,
00132                                      size_t _n_elem, 
00133                                      bool _swap) const;
00134 
00135 };
00136 
00137 
00138 //== TYPE DEFINITION ==========================================================
00139 
00140 
00142 typedef SingletonT<_OMReader_> OMReader;
00143 
00144 
00145 //=============================================================================
00146 } // namespace IO
00147 } // namespace OpenMesh
00148 //=============================================================================
00149 #endif
00150 //=============================================================================

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