OMFormat.hh
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#ifndef OPENMESH_IO_OMFORMAT_HH
#define OPENMESH_IO_OMFORMAT_HH
//=== INCLUDES ================================================================
#include <OpenMesh/Core/System/config.h>
#include <OpenMesh/Core/System/omstream.hh>
#include <OpenMesh/Core/IO/SR_store.hh>
#include <OpenMesh/Core/Utils/GenProg.hh>
#include <OpenMesh/Core/Utils/Endian.hh>
#include <OpenMesh/Core/Utils/vector_traits.hh>
// --------------------
#include <iostream>
#if defined(OM_CC_GCC) && (OM_GCC_VERSION < 30000)
# include <OpenMesh/Tools/Utils/NumLimitsT.hh>
# define OM_MISSING_HEADER_LIMITS 1
#else
# include <limits>
#endif
//== NAMESPACES ==============================================================
#ifndef DOXY_IGNORE_THIS
namespace OpenMesh {
namespace IO {
namespace OMFormat {
//=== IMPLEMENTATION ==========================================================
//-----------------------------------------------------------------------------
// <:Header>
// <:Comment>
// Chunk 0
// <:ChunkHeader>
// <:Comment>
// data
// Chunk 1
// <:ChunkHeader>
// <:Comment>
// data
// .
// .
// .
// Chunk N
//
// NOTICE!
//
// The usage of data types who differ in size
// on different pc architectures (32/64 bit) and/or
// operating systems, e.g. (unsigned) long, size_t,
// is not recommended because of inconsistencies
// in case of cross writing and reading.
//
// Basic types that are supported are:
typedef unsigned char uchar;
typedef uint8_t uint8;
typedef uint16_t uint16;
typedef uint32_t uint32;
typedef uint64_t uint64;
typedef int8_t int8;
typedef int16_t int16;
typedef int32_t int32;
typedef int64_t int64;
typedef float32_t float32;
typedef float64_t float64;
struct Header
{
uchar magic_[2]; // OM
uchar mesh_; // [T]riangles, [Q]uads, [P]olygonals
uint8 version_;
uint32 n_vertices_;
uint32 n_faces_;
uint32 n_edges_;
size_t store( std::ostream& _os, bool _swap ) const
{
_os.write( (char*)this, 4); // magic_, mesh_, version_
size_t bytes = 4;
bytes += binary<uint32_t>::store( _os, n_vertices_, _swap );
bytes += binary<uint32_t>::store( _os, n_faces_, _swap );
bytes += binary<uint32_t>::store( _os, n_edges_, _swap );
return bytes;
}
size_t restore( std::istream& _is, bool _swap )
{
if (_is.read( (char*)this, 4 ).eof())
return 0;
size_t bytes = 4;
bytes += binary<uint32_t>::restore( _is, n_vertices_, _swap );
bytes += binary<uint32_t>::restore( _is, n_faces_, _swap );
bytes += binary<uint32_t>::restore( _is, n_edges_, _swap );
return bytes;
}
};
struct Chunk
{
// Hardcoded this size to an uint32 to make the system 32/64 bit compatible.
// Needs further investigation!
typedef uint32 esize_t; // element size, used for custom properties
enum Type {
Type_Pos = 0x00,
Type_Normal = 0x01,
Type_Texcoord = 0x02,
Type_Status = 0x03,
Type_Color = 0x04,
Type_Custom = 0x06,
Type_Topology = 0x07
};
enum Entity {
Entity_Vertex = 0x00,
Entity_Mesh = 0x01,
Entity_Face = 0x02,
Entity_Edge = 0x04,
Entity_Halfedge = 0x06,
Entity_Sentinel = 0x07
};
enum Dim {
Dim_1D = 0x00,
Dim_2D = 0x01,
Dim_3D = 0x02,
Dim_4D = 0x03,
Dim_5D = 0x04,
Dim_6D = 0x05,
Dim_7D = 0x06,
Dim_8D = 0x07
};
enum Integer_Size {
Integer_8 = 0x00, // 1 byte for (unsigned) char
Integer_16 = 0x01, // 2 bytes for short
Integer_32 = 0x02, // 4 bytes for long
Integer_64 = 0x03 // 8 bytes for long long
};
enum Float_Size {
Float_32 = 0x00, // 4 bytes for float
Float_64 = 0x01, // 8 bytes for double
Float_128 = 0x02 // 16 bytes for long double (an assumption!)
};
static const int SIZE_RESERVED = 1; // 1
static const int SIZE_NAME = 1; // 2
static const int SIZE_ENTITY = 3; // 5
static const int SIZE_TYPE = 4; // 9
static const int SIZE_SIGNED = 1; // 10
static const int SIZE_FLOAT = 1; // 11
static const int SIZE_DIM = 3; // 14
static const int SIZE_BITS = 2; // 16
static const int OFF_RESERVED = 0; // 0
static const int OFF_NAME = SIZE_RESERVED + OFF_RESERVED; // 2
static const int OFF_ENTITY = SIZE_NAME + OFF_NAME; // 3
static const int OFF_TYPE = SIZE_ENTITY + OFF_ENTITY; // 5
static const int OFF_SIGNED = SIZE_TYPE + OFF_TYPE; // 9
static const int OFF_FLOAT = SIZE_SIGNED + OFF_SIGNED; // 10
static const int OFF_DIM = SIZE_FLOAT + OFF_FLOAT; // 11
static const int OFF_BITS = SIZE_DIM + OFF_DIM; // 14
// !Attention! When changing the bit size, the operators
// << (uint16, Header) and << (Header, uint16) must be changed as well
//
// Entries signed_, float_, dim_, bits_ are not used when type_
// equals Type_Custom
//
struct Header // 16 bits long
{
unsigned reserved_: SIZE_RESERVED;
unsigned name_ : SIZE_NAME; // 1 named property, 0 anonymous
unsigned entity_ : SIZE_ENTITY; // 0 vertex, 1 mesh, 2 edge,
// 4 halfedge, 6 face
unsigned type_ : SIZE_TYPE; // 0 pos, 1 normal, 2 texcoord,
// 3 status, 4 color 6 custom 7 topology
unsigned signed_ : SIZE_SIGNED; // bool
unsigned float_ : SIZE_FLOAT; // bool
unsigned dim_ : SIZE_DIM; // 0 1D, 1 2D, 2 3D, .., 7 8D
unsigned bits_ : SIZE_BITS; // {8, 16, 32, 64} | {32, 64, 128}
// (integer) (float)
unsigned unused_ : 16; // fill up to 32 bits
}; // struct Header
class PropertyName : public std::string
{
public:
static const size_t size_max = 256;
PropertyName( ) { }
PropertyName( const std::string& _name ) { *this = _name; }
bool is_valid() const { return is_valid( size() ); }
static bool is_valid( size_t _s ) { return _s <= size_max; }
PropertyName& operator = ( const std::string& _rhs )
{
assert( is_valid( _rhs.size() ) );
if ( is_valid( _rhs.size() ) )
std::string::operator = ( _rhs );
else
{
omerr() << "Warning! Property name too long. Will be shortened!\n";
this->std::string::operator = ( _rhs.substr(0, size_max) );
}
return *this;
}
};
}; // Chunk
// ------------------------------------------------------------ Helper
// -------------------- get size information
inline size_t header_size(void) { return sizeof(Header); }
inline size_t chunk_header_size( void ) { return sizeof(uint16); }
inline size_t scalar_size( const Chunk::Header& _hdr )
{
return _hdr.float_ ? (0x01 << _hdr.bits_) : (0x04 << _hdr.bits_);
}
inline size_t dimensions(const Chunk::Header& _chdr) { return _chdr.dim_+1; }
inline size_t vector_size( const Chunk::Header& _chdr )
{
return dimensions(_chdr)*scalar_size(_chdr);
}
inline size_t chunk_data_size( Header& _hdr, Chunk::Header& _chunk_hdr )
{
size_t C;
switch( _chunk_hdr.entity_ )
{
case Chunk::Entity_Vertex: C = _hdr.n_vertices_; break;
case Chunk::Entity_Face: C = _hdr.n_faces_; break;
case Chunk::Entity_Halfedge: C = _hdr.n_edges_*2; break;
case Chunk::Entity_Edge: C = _hdr.n_edges_; break;
case Chunk::Entity_Mesh: C = 1; break;
default:
C = 0;
std::cerr << "Invalid value in _chunk_hdr.entity_\n";
assert( false );
break;
}
return C * vector_size( _chunk_hdr );
}
inline size_t chunk_size( Header& _hdr, Chunk::Header& _chunk_hdr )
{
return chunk_header_size() + chunk_data_size( _hdr, _chunk_hdr );
}
// -------------------- convert from Chunk::Header to storage type
uint16& operator << (uint16& val, const Chunk::Header& hdr);
Chunk::Header& operator << (Chunk::Header& hdr, const uint16 val);
// -------------------- type information
template <typename T> bool is_float(const T&)
{
#if defined(OM_MISSING_HEADER_LIMITS)
return !Utils::NumLimitsT<T>::is_integer();
#else
return !std::numeric_limits<T>::is_integer;
#endif
}
template <typename T> bool is_integer(const T)
{
#if defined(OM_MISSING_HEADER_LIMITS)
return Utils::NumLimitsT<T>::is_integer();
#else
return std::numeric_limits<T>::is_integer;
#endif
}
template <typename T> bool is_signed(const T&)
{
#if defined(OM_MISSING_HEADER_LIMITS)
return Utils::NumLimitsT<T>::is_signed();
#else
return std::numeric_limits<T>::is_signed;
#endif
}
// -------------------- conversions (format type <- type/value)
template <typename VecType>
inline
Chunk::Dim dim( VecType )
{
assert( vector_traits< VecType >::size() < 9 );
return static_cast<Chunk::Dim>(vector_traits< VecType >::size() - 1);
}
template <typename VecType>
inline
Chunk::Dim dim( const Chunk::Header& _hdr )
{
return static_cast<Chunk::Dim>( _hdr.dim_ );
}
// calc minimum (power-of-2) number of bits needed
Chunk::Integer_Size needed_bits( size_t s );
// Convert size of type to Integer_Size
#ifdef NDEBUG
template <typename T> Chunk::Integer_Size integer_size(const T&)
#else
template <typename T> Chunk::Integer_Size integer_size(const T& d)
#endif
{
#ifndef NDEBUG
assert( is_integer(d) );
#endif
switch( sizeof(T) )
{
case 1: return OMFormat::Chunk::Integer_8;
case 2: return OMFormat::Chunk::Integer_16;
case 4: return OMFormat::Chunk::Integer_32;
case 8: return OMFormat::Chunk::Integer_64;
default:
std::cerr << "Invalid value in integer_size\n";
assert( false );
break;
}
return Chunk::Integer_Size(0);
}
// Convert size of type to FLoat_Size
#ifdef NDEBUG
template <typename T> Chunk::Float_Size float_size(const T&)
#else
template <typename T> Chunk::Float_Size float_size(const T& d)
#endif
{
#ifndef NDEBUG
assert( is_float(d) );
#endif
switch( sizeof(T) )
{
case 4: return OMFormat::Chunk::Float_32;
case 8: return OMFormat::Chunk::Float_64;
case 16: return OMFormat::Chunk::Float_128;
default:
std::cerr << "Invalid value in float_size\n";
assert( false );
break;
}
return Chunk::Float_Size(0);
}
// Return the storage type (Chunk::Header::bits_)
template <typename T>
inline
unsigned int bits(const T& val)
{
return is_integer(val)
? (static_cast<unsigned int>(integer_size(val)))
: (static_cast<unsigned int>(float_size(val)));
}
// -------------------- create/read version
inline uint8 mk_version(const uint16 major, const uint16 minor)
{ return (major & 0x07) << 5 | (minor & 0x1f); }
inline uint16 major_version(const uint8 version)
{ return (version >> 5) & 0x07; }
inline uint16 minor_version(const uint8 version)
{ return (version & 0x001f); }
// ---------------------------------------- convenience functions
const char *as_string(Chunk::Type t);
const char *as_string(Chunk::Entity e);
const char *as_string(Chunk::Dim d);
const char *as_string(Chunk::Integer_Size d);
const char *as_string(Chunk::Float_Size d);
std::ostream& operator << ( std::ostream& _os, const Header& _h );
std::ostream& operator << ( std::ostream& _os, const Chunk::Header& _c );
} // namespace OMFormat
// -------------------- (re-)store header
template <> inline
size_t store( std::ostream& _os, const OMFormat::Header& _hdr, bool _swap)
{ return _hdr.store( _os, _swap ); }
template <> inline
size_t restore( std::istream& _is, OMFormat::Header& _hdr, bool _swap )
{ return _hdr.restore( _is, _swap ); }
// -------------------- (re-)store chunk header
template <> inline
size_t
store( std::ostream& _os, const OMFormat::Chunk::Header& _hdr, bool _swap)
{
OMFormat::uint16 val; val << _hdr;
return binary<uint16_t>::store( _os, val, _swap );
}
template <> inline
size_t
restore( std::istream& _is, OMFormat::Chunk::Header& _hdr, bool _swap )
{
OMFormat::uint16 val;
size_t bytes = binary<uint16_t>::restore( _is, val, _swap );
_hdr << val;
return bytes;
}
// -------------------- (re-)store integer with wanted number of bits (bytes)
typedef GenProg::TrueType t_signed;
typedef GenProg::FalseType t_unsigned;
// helper to store a an integer
template< typename T >
size_t
store( std::ostream& _os,
const T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap,
t_signed);
// helper to store a an unsigned integer
template< typename T >
size_t
store( std::ostream& _os,
const T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap,
t_unsigned);
template< typename T >
inline
size_t
store( std::ostream& _os,
const T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap)
{
assert( OMFormat::is_integer( _val ) );
if ( OMFormat::is_signed( _val ) )
return store( _os, _val, _b, _swap, t_signed() );
return store( _os, _val, _b, _swap, t_unsigned() );
}
// helper to store a an integer
template< typename T > inline
size_t restore( std::istream& _is,
T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap,
t_signed);
// helper to store a an unsigned integer
template< typename T > inline
size_t restore( std::istream& _is,
T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap,
t_unsigned);
template< typename T >
inline
size_t
restore( std::istream& _is,
T& _val,
OMFormat::Chunk::Integer_Size _b,
bool _swap)
{
assert( OMFormat::is_integer( _val ) );
if ( OMFormat::is_signed( _val ) )
return restore( _is, _val, _b, _swap, t_signed() );
return restore( _is, _val, _b, _swap, t_unsigned() );
}
//
// ---------------------------------------- storing vectors
template <typename VecT> inline
size_t store( std::ostream& _os, const VecT& _vec, GenProg::Int2Type<2>,
bool _swap )
{
size_t bytes = store( _os, _vec[0], _swap );
bytes += store( _os, _vec[1], _swap );
return bytes;
}
template <typename VecT> inline
size_t store( std::ostream& _os, const VecT& _vec, GenProg::Int2Type<3>,
bool _swap )
{
size_t bytes = store( _os, _vec[0], _swap );
bytes += store( _os, _vec[1], _swap );
bytes += store( _os, _vec[2], _swap );
return bytes;
}
template <typename VecT> inline
size_t store( std::ostream& _os, const VecT& _vec, GenProg::Int2Type<4>,
bool _swap )
{
size_t bytes = store( _os, _vec[0], _swap );
bytes += store( _os, _vec[1], _swap );
bytes += store( _os, _vec[2], _swap );
bytes += store( _os, _vec[3], _swap );
return bytes;
}
template <typename VecT> inline
size_t store( std::ostream& _os, const VecT& _vec, GenProg::Int2Type<1>,
bool _swap )
{
return store( _os, _vec[0], _swap );
}
template <typename VecT> inline
size_t vector_store( std::ostream& _os, const VecT& _vec, bool _swap )
{
return store( _os, _vec,
GenProg::Int2Type< vector_traits<VecT>::size_ >(),
_swap );
}
// ---------------------------------------- restoring vectors
template <typename VecT>
inline
size_t
restore( std::istream& _is, VecT& _vec, GenProg::Int2Type<2>,
bool _swap )
{
size_t bytes = restore( _is, _vec[0], _swap );
bytes += restore( _is, _vec[1], _swap );
return bytes;
}
template <typename VecT>
inline
size_t
restore( std::istream& _is, VecT& _vec, GenProg::Int2Type<3>,
bool _swap )
{
typedef typename vector_traits<VecT>::value_type scalar_type;
size_t bytes;
bytes = binary<scalar_type>::restore( _is, _vec[0], _swap );
bytes += binary<scalar_type>::restore( _is, _vec[1], _swap );
bytes += binary<scalar_type>::restore( _is, _vec[2], _swap );
return bytes;
}
template <typename VecT>
inline
size_t
restore( std::istream& _is, VecT& _vec, GenProg::Int2Type<4>,
bool _swap )
{
typedef typename vector_traits<VecT>::value_type scalar_type;
size_t bytes;
bytes = binary<scalar_type>::restore( _is, _vec[0], _swap );
bytes += binary<scalar_type>::restore( _is, _vec[1], _swap );
bytes += binary<scalar_type>::restore( _is, _vec[2], _swap );
bytes += binary<scalar_type>::restore( _is, _vec[3], _swap );
return bytes;
}
template <typename VecT>
inline
size_t
restore( std::istream& _is, VecT& _vec, GenProg::Int2Type<1>,
bool _swap )
{
return restore( _is, _vec[0], _swap );
}
template <typename VecT>
inline
size_t
vector_restore( std::istream& _is, VecT& _vec, bool _swap )
{
return restore( _is, _vec,
GenProg::Int2Type< vector_traits<VecT>::size_ >(),
_swap );
}
// ---------------------------------------- storing property names
template <>
inline
size_t store( std::ostream& _os, const OMFormat::Chunk::PropertyName& _pn,
bool _swap )
{
store( _os, _pn.size(), OMFormat::Chunk::Integer_8, _swap ); // 1 byte
if ( _pn.size() )
_os.write( _pn.c_str(), _pn.size() ); // size bytes
return _pn.size() + 1;
}
template <>
inline
size_t restore( std::istream& _is, OMFormat::Chunk::PropertyName& _pn,
bool _swap )
{
size_t size;
restore( _is, size, OMFormat::Chunk::Integer_8, _swap); // 1 byte
assert( OMFormat::Chunk::PropertyName::is_valid( size ) );
if ( size > 0 )
{
char buf[256];
_is.read( buf, size ); // size bytes
buf[size] = '\0';
_pn.resize(size);
_pn = buf;
}
return size+1;
}
//=============================================================================
} // namespace IO
} // namespace OpenMesh
#endif
//=============================================================================
#if defined(OM_MISSING_HEADER_LIMITS)
# undef OM_MISSING_HEADER_LIMITS
#endif
//=============================================================================
#if defined(OM_INCLUDE_TEMPLATES) && !defined(OPENMESH_IO_OMFORMAT_CC)
# define OPENMESH_IO_OMFORMAT_TEMPLATES
# include "OMFormatT.cc"
#endif
//=============================================================================
#endif
//=============================================================================
OpenMesh::IO::uchar
unsigned char uchar
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:81
omstream.hh
This file provides the streams omlog, omout, and omerr.
NumLimitsT.hh
Temporary solution until std::numeric_limits is standard.
OpenMesh::operator<<
auto operator<<(std::ostream &os, const VectorT< Scalar, DIM > &_vec) -> typename std::enable_if< sizeof(decltype(os<< _vec[0])) >=0
output a vector by printing its space-separated compontens
OpenMesh::vector_traits::size
static size_t size()
size/dimension of the vector
Definition: vector_traits.hh:105
OpenMesh::IO::int16_t
short int16_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:86
OpenMesh::vector_traits::value_type
T::value_type value_type
Type of the scalar value.
Definition: vector_traits.hh:99
OpenMesh::IO::int32_t
int int32_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:90
OpenMesh::IO::int64_t
long long int64_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:94
OpenMesh
Contains all the mesh ingredients like the polygonal mesh, the triangle mesh, different mesh kernels ...
Definition: MeshItems.hh:64
OpenMesh::IO::float32_t
float float32_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:97
OpenMesh::IO::uint32_t
unsigned int uint32_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:90
OpenMesh::IO::uint8_t
unsigned char uint8_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:85
OpenMesh::IO::int8_t
signed char int8_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:85
OpenMesh::IO::uint64_t
unsigned long long uint64_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:94
OpenMesh::vector_traits::size_
static const size_t size_
size/dimension of the vector
Definition: vector_traits.hh:102
OpenMesh::IO::float64_t
double float64_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:98
OpenMesh::IO::uint16_t
unsigned short uint16_t
Binary read a short from _is and perform byte swapping if _swap is true.
Definition: SR_types.hh:86