//
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// Copyright 2012 Christian Henning
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//
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// Distributed under the Boost Software License, Version 1.0
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// See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt
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//
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#ifndef BOOST_GIL_IO_MAKE_READER_HPP
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#define BOOST_GIL_IO_MAKE_READER_HPP
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#include <boost/gil/detail/mp11.hpp>
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#include <boost/gil/io/get_reader.hpp>
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#include <type_traits>
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namespace boost { namespace gil {
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template <typename String, typename FormatTag, typename ConversionPolicy>
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inline
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auto make_reader(
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String const&file_name,
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image_read_settings<FormatTag> const& settings,
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ConversionPolicy const&,
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typename std::enable_if
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<
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mp11::mp_and
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<
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detail::is_supported_path_spec<String>,
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is_format_tag<FormatTag>
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>::value
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>::type* /*dummy*/ = nullptr)
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-> typename get_reader<String, FormatTag, ConversionPolicy>::type
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{
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typename get_read_device<String, FormatTag>::type device(
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detail::convert_to_native_string(file_name),
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typename detail::file_stream_device<FormatTag>::read_tag());
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return
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typename get_reader<String, FormatTag, ConversionPolicy>::type(device, settings);
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}
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template< typename FormatTag
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, typename ConversionPolicy
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>
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inline
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typename get_reader< std::wstring
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, FormatTag
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, ConversionPolicy
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>::type
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make_reader( const std::wstring& file_name
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, const image_read_settings< FormatTag >& settings
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, const ConversionPolicy&
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)
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{
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const char* str = detail::convert_to_native_string( file_name );
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typename get_read_device< std::wstring
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, FormatTag
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>::type device( str
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, typename detail::file_stream_device< FormatTag >::read_tag()
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);
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delete[] str; // TODO: RAII
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return typename get_reader< std::wstring
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, FormatTag
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, ConversionPolicy
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>::type( device
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, settings
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);
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}
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#ifdef BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
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template< typename FormatTag
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, typename ConversionPolicy
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>
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inline
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typename get_reader< std::wstring
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, FormatTag
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, ConversionPolicy
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>::type
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make_reader( const filesystem::path& path
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, const image_read_settings< FormatTag >& settings
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, const ConversionPolicy& cc
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)
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{
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return make_reader( path.wstring()
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, settings
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, cc
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);
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}
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#endif // BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
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template <typename Device, typename FormatTag, typename ConversionPolicy>
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inline
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auto make_reader(
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Device& file,
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image_read_settings<FormatTag> const& settings,
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ConversionPolicy const&,
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typename std::enable_if
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<
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mp11::mp_and
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<
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detail::is_adaptable_input_device<FormatTag, Device>,
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is_format_tag<FormatTag>
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>::value
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>::type* /*dummy*/ = nullptr)
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-> typename get_reader<Device, FormatTag, ConversionPolicy>::type
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{
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typename get_read_device<Device, FormatTag>::type device(file);
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return
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typename get_reader<Device, FormatTag, ConversionPolicy>::type(device, settings);
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}
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// no image_read_settings
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template <typename String, typename FormatTag, typename ConversionPolicy>
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inline
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auto make_reader(
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String const&file_name,
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FormatTag const&,
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ConversionPolicy const& cc,
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typename std::enable_if
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<
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mp11::mp_and
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<
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detail::is_supported_path_spec<String>,
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is_format_tag<FormatTag>
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>::value
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>::type* /*dummy*/ = nullptr)
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-> typename get_reader<String, FormatTag, ConversionPolicy>::type
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{
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return make_reader(file_name, image_read_settings<FormatTag>(), cc);
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}
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template< typename FormatTag
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, typename ConversionPolicy
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>
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inline
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typename get_reader< std::wstring
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, FormatTag
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, ConversionPolicy
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>::type
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make_reader( const std::wstring& file_name
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, const FormatTag&
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, const ConversionPolicy& cc
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)
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{
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return make_reader( file_name
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, image_read_settings< FormatTag >()
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, cc
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);
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}
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#ifdef BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
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template< typename FormatTag
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, typename ConversionPolicy
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>
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inline
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typename get_reader< std::wstring
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, FormatTag
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, ConversionPolicy
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>::type
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make_reader( const filesystem::path& path
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, const FormatTag&
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, const ConversionPolicy& cc
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)
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{
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return make_reader( path.wstring()
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, image_read_settings< FormatTag >()
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, cc
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);
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}
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#endif // BOOST_GIL_IO_ADD_FS_PATH_SUPPORT
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template <typename Device, typename FormatTag, typename ConversionPolicy>
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inline
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auto make_reader(
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Device& file,
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FormatTag const&,
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ConversionPolicy const& cc,
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typename std::enable_if
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<
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mp11::mp_and
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<
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detail::is_adaptable_input_device<FormatTag, Device>,
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is_format_tag<FormatTag>
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>::value
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>::type* /*dummy*/ = nullptr)
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-> typename get_reader<Device, FormatTag, ConversionPolicy>::type
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{
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return make_reader(file, image_read_settings<FormatTag>(), cc);
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}
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}} // namespace boost::gil
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#endif
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