ExifTypes.hpp

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/*
    libglim: a C++ Free library render images using OpenGL
    Copyright (C) 2002 Nestal Wan

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License
    as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    General Public License for more details.

    You should have received a copy of the GNU General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef __PICINFO_EXIF_TYPES_HEADER_INCLUDED__
#define __PICINFO_EXIF_TYPES_HEADER_INCLUDED__

#ifndef __PICINFO_CSTDINT_HEADER_INCLUDED__
#include "cstdint.hpp"
#endif

#include <cstddef>
#include <string>
#include <vector>

namespace picinfo {

typedef uint16_t    tag_t ;

struct ValueMap
{
    uint32_t    value ;
    const char  *name ;
} ;

enum TagType
{
    byte = 1, ascii, ushort, ulong, urational, sbyte, undefined, sshort,
    slong, srational,
    
    // not appear in EXIF 2.2 spec
    sfloat, dfloat,
    
    // number of types or invalid type
    no_type

} ;

enum TypeMask
{
    byte_mask       = 1 << byte,
    ascii_mask      = 1 << ascii,
    ushort_mask     = 1 << ushort,
    ulong_mask      = 1 << ulong,
    urat_mask       = 1 << urational,
    sbyte_mask      = 1 << sbyte,
    undef_mask      = 1 << undefined,
    sshort_mask     = 1 << sshort,
    slong_mask      = 1 << slong,
    srat_mask       = 1 << srational,
    sfloat_mask     = 1 << sfloat,
    dfloat_mask     = 1 << dfloat,
} ;

// convinient macro for getting array size
#define COUNT( array ) ( sizeof(array) / sizeof(array[0]) )

} // end of namespace

#endif

---