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//=============================================================================
//
//  Implements a writer module for OFF files
//
//=============================================================================


#ifndef __OFFWRITER_HH__
#define __OFFWRITER_HH__


//=== INCLUDES ================================================================

#include <string>
#include <ostream>

#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/Utils/SingletonT.hh>
#include <OpenMesh/Core/IO/exporter/BaseExporter.hh>
#include <OpenMesh/Core/IO/writer/BaseWriter.hh>


//== NAMESPACES ===============================================================


namespace OpenMesh {
namespace IO {


//=== IMPLEMENTATION ==========================================================


/**
    Implementation of the OFF format writer. This class is singleton'ed by
    SingletonT to OFFWriter.

    By passing Options to the write function you can manipulate the writing behavoir.
    The following options can be set:

    Binary
    VertexNormal
    VertexColor
    VertexTexCoord
    FaceColor
    ColorAlpha

*/
class OPENMESHDLLEXPORT _OFFWriter_ : public BaseWriter
{
public:

  _OFFWriter_();

  virtual ~_OFFWriter_() {};

  std::string get_description() const override { return "no description"; }
  std::string get_extensions()  const override  { return "off"; }

  bool write(const std::string&, BaseExporter&, Options, std::streamsize _precision = 6) const override;

  bool write(std::ostream&, BaseExporter&, Options, std::streamsize _precision = 6) const override;

  size_t binary_size(BaseExporter& _be, Options _opt) const override;


protected:
  void writeValue(std::ostream& _out, int value) const;
  void writeValue(std::ostream& _out, unsigned int value) const;
  void writeValue(std::ostream& _out, float value) const;

  bool write_ascii(std::ostream& _in, BaseExporter&, Options) const;
  bool write_binary(std::ostream& _in, BaseExporter&, Options) const;
};


//== TYPE DEFINITION ==========================================================


/// Declare the single entity of the OFF writer.
extern _OFFWriter_  __OFFWriterInstance;
OPENMESHDLLEXPORT _OFFWriter_& OFFWriter();


//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================
