OMReader.hh

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//=============================================================================
//
//  Implements a reader module for OFF files
//
//=============================================================================
 
 
#ifndef __OMREADER_HH__
#define __OMREADER_HH__
 
 
//=== INCLUDES ================================================================
 
// OpenMesh
#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/Utils/SingletonT.hh>
#include <OpenMesh/Core/IO/OMFormat.hh>
#include <OpenMesh/Core/IO/IOManager.hh>
#include <OpenMesh/Core/IO/importer/BaseImporter.hh>
#include <OpenMesh/Core/IO/reader/BaseReader.hh>
 
// STD C++
#include <iosfwd>
#include <string>
 
 
//== NAMESPACES ===============================================================
 
 
namespace OpenMesh {
namespace IO {
 
 
//== IMPLEMENTATION ===========================================================
 
 
class OPENMESHDLLEXPORT _OMReader_ : public BaseReader
{
public:
 
  _OMReader_();
  virtual ~_OMReader_() { }
 
  std::string get_description() const override { return "OpenMesh File Format"; }
  std::string get_extensions()  const override { return "om"; }
  std::string get_magic()       const override { return "OM"; }
 
  bool read(const std::string& _filename,
            BaseImporter& _bi,
            Options& _opt ) override;
 
  bool read(std::istream& _is,
            BaseImporter& _bi,
            Options& _opt ) override;
 
  virtual bool can_u_read(const std::string& _filename) const override;
  virtual bool can_u_read(std::istream& _is) const;
 
 
private:
 
  bool supports( const OMFormat::uint8 version ) const;
 
  bool read_ascii(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
  bool read_binary(std::istream& _is, BaseImporter& _bi, Options& _opt) const;
 
  typedef OMFormat::Header              Header;
  typedef OMFormat::Chunk::Header       ChunkHeader;
  typedef OMFormat::Chunk::PropertyName PropertyName;
 
  // initialized/updated by read_binary*/read_ascii*
  mutable size_t       bytes_;
  mutable Options      fileOptions_;
  mutable Header       header_;
  mutable ChunkHeader  chunk_header_;
  mutable PropertyName property_name_;
 
  bool read_binary_vertex_chunk(   std::istream      &_is,
                                   BaseImporter      &_bi,
                                   Options           &_opt,
                                   bool              _swap) const;
 
  bool read_binary_face_chunk(     std::istream      &_is,
                                   BaseImporter      &_bi,
                                   Options           &_opt,
                                   bool              _swap) const;
 
  bool read_binary_edge_chunk(     std::istream      &_is,
                                   BaseImporter      &_bi,
                                   Options           &_opt,
                                   bool              _swap) const;
 
  bool read_binary_halfedge_chunk( std::istream      &_is,
                                   BaseImporter      &_bi,
                                   Options           &_opt,
                                   bool              _swap) const;
 
  bool read_binary_mesh_chunk(     std::istream      &_is,
                                   BaseImporter      &_bi,
                                   Options           &_opt,
                                   bool              _swap) const;
 
  size_t restore_binary_custom_data(std::istream& _is,
             BaseProperty* _bp,
             size_t _n_elem,
             bool _swap) const;
 
  //------------------helper
private:
  void add_generic_property(OMFormat::Chunk::PropertyName& _property_type, BaseImporter& _bi) const;
};
 
 
//== TYPE DEFINITION ==========================================================
 
 
extern _OMReader_  __OMReaderInstance;
OPENMESHDLLEXPORT _OMReader_&  OMReader();
 
 
//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================