OpenMesh
OpenMesh/Core/IO/reader/OMReader.hh
00001 /*===========================================================================*\
00002  *                                                                           *
00003  *                               OpenMesh                                    *
00004  *      Copyright (C) 2001-2011 by Computer Graphics Group, RWTH Aachen      *
00005  *                           www.openmesh.org                                *
00006  *                                                                           *
00007  *---------------------------------------------------------------------------* 
00008  *  This file is part of OpenMesh.                                           *
00009  *                                                                           *
00010  *  OpenMesh is free software: you can redistribute it and/or modify         * 
00011  *  it under the terms of the GNU Lesser General Public License as           *
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00014  *  following exceptions:                                                    *
00015  *                                                                           *
00016  *  If other files instantiate templates or use macros                       *
00017  *  or inline functions from this file, or you compile this file and         *
00018  *  link it with other files to produce an executable, this file does        *
00019  *  not by itself cause the resulting executable to be covered by the        *
00020  *  GNU Lesser General Public License. This exception does not however       *
00021  *  invalidate any other reasons why the executable file might be            *
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00023  *                                                                           *
00024  *  OpenMesh is distributed in the hope that it will be useful,              *
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00026  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            *
00027  *  GNU Lesser General Public License for more details.                      *
00028  *                                                                           *
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00032  *                                                                           *
00033 \*===========================================================================*/ 
00034 
00035 /*===========================================================================*\
00036  *                                                                           *             
00037  *   $Revision: 362 $                                                         *
00038  *   $Date: 2011-01-26 10:21:12 +0100 (Mi, 26 Jan 2011) $                   *
00039  *                                                                           *
00040 \*===========================================================================*/
00041 
00042 
00043 //=============================================================================
00044 //
00045 //  Implements a reader module for OFF files
00046 //
00047 //=============================================================================
00048 
00049 
00050 #ifndef __OMREADER_HH__
00051 #define __OMREADER_HH__
00052 
00053 
00054 //=== INCLUDES ================================================================
00055 
00056 // OpenMesh
00057 #include <OpenMesh/Core/System/config.h>
00058 #include <OpenMesh/Core/Utils/SingletonT.hh>
00059 #include <OpenMesh/Core/IO/OMFormat.hh>
00060 #include <OpenMesh/Core/IO/IOManager.hh>
00061 #include <OpenMesh/Core/IO/importer/BaseImporter.hh>
00062 #include <OpenMesh/Core/IO/reader/BaseReader.hh>
00063 
00064 // STD C++
00065 #include <iostream>
00066 #include <string>
00067 
00068 
00069 //== NAMESPACES ===============================================================
00070 
00071 
00072 namespace OpenMesh {
00073 namespace IO {
00074 
00075 
00076 //== IMPLEMENTATION ===========================================================
00077 
00078 
00083 class _OMReader_ : public BaseReader
00084 {
00085 public:
00086 
00087   _OMReader_();
00088   virtual ~_OMReader_() { }
00089 
00090   std::string get_description() const { return "OpenMesh File Format"; }
00091   std::string get_extensions()  const { return "om"; }
00092   std::string get_magic()       const { return "OM"; }
00093    
00094   bool read(const std::string& _filename, 
00095             BaseImporter& _bi, 
00096             Options& _opt );
00097 
00099   bool read(std::istream& _is, 
00100             BaseImporter& _bi, 
00101             Options& _opt );
00102             
00103   virtual bool can_u_read(const std::string& _filename) const;
00104   virtual bool can_u_read(std::istream& _is) const;
00105 
00106   
00107 private:
00108 
00109   bool supports( const OMFormat::uint8 version ) const;
00110 
00111   bool read_ascii(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
00112   bool read_binary(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
00113 
00114   typedef OMFormat::Header              Header;
00115   typedef OMFormat::Chunk::Header       ChunkHeader;
00116   typedef OMFormat::Chunk::PropertyName PropertyName;
00117 
00118   // initialized/updated by read_binary*/read_ascii*
00119   mutable size_t       bytes_;
00120   mutable Header       header_;
00121   mutable ChunkHeader  chunk_header_;
00122   mutable PropertyName property_name_;
00123 
00124   bool read_binary_vertex_chunk(   std::istream      &_is, 
00125                                    BaseImporter      &_bi, 
00126                                    Options           &_opt,
00127                                    bool              _swap) const;
00128 
00129   bool read_binary_face_chunk(     std::istream      &_is, 
00130                                    BaseImporter      &_bi, 
00131                                    Options           &_opt,
00132                                    bool              _swap) const;
00133 
00134   bool read_binary_edge_chunk(     std::istream      &_is, 
00135                                    BaseImporter      &_bi, 
00136                                    Options           &_opt,
00137                                    bool              _swap) const;
00138 
00139   bool read_binary_halfedge_chunk( std::istream      &_is, 
00140                                    BaseImporter      &_bi, 
00141                                    Options           &_opt,
00142                                    bool              _swap) const;
00143 
00144   bool read_binary_mesh_chunk(     std::istream      &_is, 
00145                                    BaseImporter      &_bi, 
00146                                    Options           &_opt,
00147                                    bool              _swap) const;
00148 
00149   size_t restore_binary_custom_data( std::istream& _is, 
00150                                      BaseProperty* _bp,
00151                                      size_t _n_elem, 
00152                                      bool _swap) const;
00153 
00154 };
00155 
00156 
00157 //== TYPE DEFINITION ==========================================================
00158 
00159 
00161 extern _OMReader_  __OMReaderInstance;
00162 _OMReader_&  OMReader();
00163 
00164 
00165 //=============================================================================
00166 } // namespace IO
00167 } // namespace OpenMesh
00168 //=============================================================================
00169 #endif
00170 //=============================================================================