base.hpp

//
// Copyright 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev
//
// Distributed under the Boost Software License, Version 1.0
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
//
#ifndef BOOST_GIL_IO_BASE_HPP
#define BOOST_GIL_IO_BASE_HPP
 
#include <boost/gil/extension/toolbox/toolbox.hpp>
 
#include <boost/gil/bit_aligned_pixel_reference.hpp>
#include <boost/gil/bit_aligned_pixel_iterator.hpp>
#include <boost/gil/color_convert.hpp>
#include <boost/gil/utilities.hpp>
#include <boost/gil/io/error.hpp>
#include <boost/gil/io/typedefs.hpp>
 
#include <istream>
#include <ostream>
#include <type_traits>
#include <vector>
 
namespace boost { namespace gil {
 
struct format_tag {};
 
template< typename Property >
struct property_base
{
    using type = Property;
};
 
template<typename FormatTag>
struct is_format_tag : std::is_base_of<format_tag, FormatTag> {};
 
struct image_read_settings_base
{
protected:
 
    image_read_settings_base()
    : _top_left( 0, 0 )
    , _dim     ( 0, 0 )
    {}
 
    image_read_settings_base( point_t const& top_left
                            , point_t const& dim
                            )
    : _top_left( top_left )
    , _dim     ( dim      )
    {}
 
 
public:
 
    void set( point_t const& top_left
            , point_t const& dim
            )
    {
        _top_left = top_left;
        _dim      = dim;
    }
 
public:
 
    point_t _top_left;
    point_t _dim;
};
 
// Depending on image type the parameter Pixel can be a reference type
// for bit_aligned images or a pixel for byte images.
template< typename Pixel, typename FormatTag > struct is_read_supported {};
template< typename Pixel, typename FormatTag > struct is_write_supported {};
 
 
namespace detail {
 
template< typename Property >
struct property_base
{
    using type = Property;
};
 
} // namespace detail
 
struct read_support_true  { static constexpr bool is_supported = true; };
struct read_support_false { static constexpr bool is_supported = false; };
struct write_support_true { static constexpr bool is_supported = true; };
struct write_support_false{ static constexpr bool is_supported = false; };
 
class no_log {};
 
template< typename Device, typename FormatTag > struct reader_backend;
template< typename Device, typename FormatTag > struct writer_backend;
 
template< typename FormatTag > struct image_read_info;
template< typename FormatTag > struct image_read_settings;
template< typename FormatTag, typename Log = no_log > struct image_write_info;
 
} // namespace gil
} // namespace boost
 
#endif