122 lines
3.4 KiB
C++
122 lines
3.4 KiB
C++
//
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//
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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_BACKEND_HPP
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#define BOOST_GIL_IO_MAKE_BACKEND_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>
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inline
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auto make_reader_backend(
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String const& file_name, image_read_settings<FormatTag> const& settings,
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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_backend<String, FormatTag>::type
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{
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using device_t = typename get_read_device<String, FormatTag>::type;
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device_t 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 reader_backend<device_t, FormatTag>(device, settings);
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}
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template <typename FormatTag>
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inline
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auto make_reader_backend(
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std::wstring const& file_name, image_read_settings<FormatTag> const& settings)
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-> typename get_reader_backend<std::wstring, FormatTag>::type
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{
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char const* str = detail::convert_to_native_string(file_name);
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using device_t = typename get_read_device<std::wstring, FormatTag>::type;
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device_t device(str, typename detail::file_stream_device<FormatTag>::read_tag());
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delete[] str; // TODO: RAII
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return reader_backend<device_t, FormatTag>(device, settings);
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}
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template <typename FormatTag>
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inline
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auto make_reader_backend(
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detail::filesystem::path const& path,
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image_read_settings<FormatTag> const& settings)
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-> typename get_reader_backend<std::wstring, FormatTag>::type
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{
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return make_reader_backend(path.wstring(), settings);
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}
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template <typename Device, typename FormatTag>
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inline
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auto make_reader_backend(Device& io_dev, image_read_settings<FormatTag> const& settings,
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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_backend<Device, FormatTag>::type
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{
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using device_t = typename get_read_device<Device, FormatTag>::type;
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device_t device(io_dev);
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return reader_backend<device_t, FormatTag>(device, settings);
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}
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template <typename String, typename FormatTag>
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inline
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auto make_reader_backend(String const& file_name, FormatTag 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_backend<String, FormatTag>::type
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{
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return make_reader_backend(file_name, image_read_settings<FormatTag>());
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}
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template <typename Device, typename FormatTag>
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inline
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auto make_reader_backend(Device& io_dev, FormatTag 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_backend<Device, FormatTag>::type
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{
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return make_reader_backend(io_dev, image_read_settings<FormatTag>());
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}
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}} // namespace boost::gil
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#endif
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