111 lines
3.7 KiB
C++
111 lines
3.7 KiB
C++
//
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// Copyright 2007-2012 Christian Henning, Andreas Pokorny, Lubomir Bourdev
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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_READ_IMAGE_INFO_HPP
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#define BOOST_GIL_IO_READ_IMAGE_INFO_HPP
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#include <boost/gil/io/base.hpp>
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#include <boost/gil/io/device.hpp>
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#include <boost/gil/io/get_reader.hpp>
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#include <boost/gil/io/path_spec.hpp>
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#include <boost/gil/detail/mp11.hpp>
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#include <type_traits>
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namespace boost{ namespace gil {
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/// \ingroup IO
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/// \brief Returns the image format backend. Backend is format specific.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template <typename Device, typename FormatTag>
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inline
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auto read_image_info(Device& file, 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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return make_reader_backend(file, settings);
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}
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/// \brief Returns the image format backend. Backend is format specific.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template <typename Device, typename FormatTag>
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inline
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auto read_image_info(Device& file, 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 read_image_info(file, image_read_settings<FormatTag>());
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}
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/// \brief Returns the image format backend. Backend is format specific.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template <typename String, typename FormatTag>
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inline
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auto read_image_info(
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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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is_format_tag<FormatTag>,
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detail::is_supported_path_spec<String>
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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, settings);
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}
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/// \brief Returns the image format backend. Backend is format specific.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \return image_read_info object dependent on the image format.
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/// \throw std::ios_base::failure
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template <typename String, typename FormatTag>
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inline
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auto read_image_info(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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is_format_tag<FormatTag>,
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detail::is_supported_path_spec<String>
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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 read_image_info(file_name, image_read_settings<FormatTag>());
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}
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}} // namespace boost::gil
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#endif
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