PLYReader.hh 9.16 KB
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/* ========================================================================= *
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 *                                                                           *
 *                               OpenMesh                                    *
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 *           Copyright (c) 2001-2015, RWTH-Aachen University                 *
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 *           Department of Computer Graphics and Multimedia                  *
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 *                          All rights reserved.                             *
 *                            www.openmesh.org                               *
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 *                                                                           *
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 *---------------------------------------------------------------------------*
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 * This file is part of OpenMesh.                                            *
 *---------------------------------------------------------------------------*
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 *                                                                           *
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 * Redistribution and use in source and binary forms, with or without        *
 * modification, are permitted provided that the following conditions        *
 * are met:                                                                  *
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 *                                                                           *
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 * 1. Redistributions of source code must retain the above copyright notice, *
 *    this list of conditions and the following disclaimer.                  *
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 *                                                                           *
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 * 2. Redistributions in binary form must reproduce the above copyright      *
 *    notice, this list of conditions and the following disclaimer in the    *
 *    documentation and/or other materials provided with the distribution.   *
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 *                                                                           *
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 * 3. Neither the name of the copyright holder nor the names of its          *
 *    contributors may be used to endorse or promote products derived from   *
 *    this software without specific prior written permission.               *
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 *                                                                           *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS       *
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED *
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A           *
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER *
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  *
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,       *
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR        *
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF    *
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING      *
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS        *
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              *
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 *                                                                           *
 * ========================================================================= */
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//=============================================================================
//
//  Implements a reader module for OFF files
//
//=============================================================================


#ifndef __PLYREADER_HH__
#define __PLYREADER_HH__


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


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#include <iosfwd>
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#include <string>
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#include <cstdio>
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#include <vector>
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#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/Utils/SingletonT.hh>
#include <OpenMesh/Core/IO/reader/BaseReader.hh>
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#include <OpenMesh/Core/Utils/GenProg.hh>
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//== NAMESPACES ===============================================================


namespace OpenMesh {
namespace IO {


//== FORWARDS =================================================================


class BaseImporter;


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


/**
    Implementation of the PLY format reader. This class is singleton'ed by
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    SingletonT to OFFReader. It can read custom properties, accessible via the name
    of the custom properties. List properties has the type std::vector<Type>.
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*/

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class OPENMESHDLLEXPORT _PLYReader_ : public BaseReader
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{
public:

  _PLYReader_();

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  std::string get_description() const override { return "PLY polygon file format"; }
  std::string get_extensions()  const override { return "ply"; }
  std::string get_magic()       const override { return "PLY"; }
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  bool read(const std::string& _filename,
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        BaseImporter& _bi,
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        Options& _opt) override;
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  bool read(std::istream& _is,
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            BaseImporter& _bi,
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            Options& _opt) override;
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  bool can_u_read(const std::string& _filename) const override;
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  enum ValueType {
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    Unsupported,
    ValueTypeINT8, ValueTypeCHAR,
    ValueTypeUINT8, ValueTypeUCHAR,
    ValueTypeINT16, ValueTypeSHORT,
    ValueTypeUINT16, ValueTypeUSHORT,
    ValueTypeINT32, ValueTypeINT,
    ValueTypeUINT32, ValueTypeUINT,
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    ValueTypeFLOAT32, ValueTypeFLOAT,
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    ValueTypeFLOAT64, ValueTypeDOUBLE
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  };

private:

  bool can_u_read(std::istream& _is) const;

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  bool read_ascii(std::istream& _in, BaseImporter& _bi, const Options& _opt) const;
  bool read_binary(std::istream& _in, BaseImporter& _bi, bool swap, const Options& _opt) const;
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  float readToFloatValue(ValueType _type , std::fstream& _in) const;

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  void readValue(ValueType _type , std::istream& _in, float& _value) const;
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  void readValue(ValueType _type , std::istream& _in, double& _value) const;
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  void readValue(ValueType _type , std::istream& _in, unsigned int& _value) const;
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  void readValue(ValueType _type , std::istream& _in, unsigned short& _value) const;
  void readValue(ValueType _type , std::istream& _in, unsigned char& _value) const;
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  void readValue(ValueType _type , std::istream& _in, int& _value) const;
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  void readValue(ValueType _type , std::istream& _in, short& _value) const;
  void readValue(ValueType _type , std::istream& _in, signed char& _value) const;
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  void readInteger(ValueType _type, std::istream& _in, int& _value) const;
  void readInteger(ValueType _type, std::istream& _in, unsigned int& _value) const;

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  /// Read unsupported properties in PLY file
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  void consume_input(std::istream& _in, int _count) const {
	  _in.read(reinterpret_cast<char*>(&buff[0]), _count);
  }

  mutable unsigned char buff[8];

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  /// Available per file options for reading
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  mutable Options options_;
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  /// Options that the user wants to read
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  mutable Options userOptions_;

  mutable unsigned int vertexCount_;
  mutable unsigned int faceCount_;

  mutable uint vertexDimension_;

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  enum Property {
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    XCOORD,YCOORD,ZCOORD,
    TEXX,TEXY,
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    COLORRED,COLORGREEN,COLORBLUE,COLORALPHA,
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    XNORM,YNORM,ZNORM, CUSTOM_PROP, VERTEX_INDICES,
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    UNSUPPORTED
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  };

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  /// Stores sizes of property types
  mutable std::map<ValueType, int> scalar_size_;
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  // Number of vertex properties
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  struct PropertyInfo
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  {
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    Property       property;
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    ValueType      value;
    std::string    name;//for custom properties
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    ValueType      listIndexType;//if type is unsupported, the poerty is not a list. otherwise, it the index type
    PropertyInfo():property(UNSUPPORTED),value(Unsupported),name(""),listIndexType(Unsupported){}
    PropertyInfo(Property _p, ValueType _v):property(_p),value(_v),name(""),listIndexType(Unsupported){}
    PropertyInfo(Property _p, ValueType _v, const std::string& _n):property(_p),value(_v),name(_n),listIndexType(Unsupported){}
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  };
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  enum Element {
	  VERTEX,
	  FACE,
	  UNKNOWN
  };

  // Information on the elements
  struct ElementInfo
  {
    Element element_;
    std::string name_;
    unsigned int count_;
    std::vector< PropertyInfo > properties_;
  };

  mutable std::vector< ElementInfo > elements_;
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  template<typename T>
  inline void read(_PLYReader_::ValueType _type, std::istream& _in, T& _value, OpenMesh::GenProg::TrueType /*_binary*/) const
  {
    readValue(_type, _in, _value);
  }

  template<typename T>
  inline void read(_PLYReader_::ValueType _type, std::istream& _in, T& _value, OpenMesh::GenProg::FalseType /*_binary*/) const
  {
    _in >> _value;
  }

  //read and assign custom properties with the given type. Also creates property, if not exist
  template<bool binary, typename T, typename Handle>
  void readCreateCustomProperty(std::istream& _in, BaseImporter& _bi, Handle _h, const std::string& _propName, const ValueType _valueType, const ValueType _listType) const;

  template<bool binary, typename Handle>
  void readCustomProperty(std::istream& _in, BaseImporter& _bi, Handle _h, const std::string& _propName, const _PLYReader_::ValueType _valueType, const _PLYReader_::ValueType _listIndexType) const;
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};


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


/// Declare the single entity of the PLY reader
extern _PLYReader_  __PLYReaderInstance;
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OPENMESHDLLEXPORT _PLYReader_&  PLYReader();
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//=============================================================================
} // namespace IO
} // namespace OpenMesh
//=============================================================================
#endif
//=============================================================================