289 lines
9.9 KiB
C++
289 lines
9.9 KiB
C++
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//
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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_HPP
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#define BOOST_GIL_IO_READ_IMAGE_HPP
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#include <boost/gil/extension/toolbox/dynamic_images.hpp>
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#include <boost/gil/io/base.hpp>
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#include <boost/gil/io/conversion_policies.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 Reads an image without conversion. Image memory is allocated.
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/// \param reader An image reader.
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/// \param img The image in which the data is read into. Must satisfy is_read_supported metafunction.
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/// \throw std::ios_base::failure
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template <typename Reader, typename Image>
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inline
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void read_image(Reader reader, Image& img,
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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_reader<Reader>,
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is_format_tag<typename Reader::format_tag_t>,
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is_read_supported
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<
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typename get_pixel_type<typename Image::view_t>::type,
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typename Reader::format_tag_t
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>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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reader.init_image(img, reader._settings);
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reader.apply(view(img));
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file It's a device. Must satisfy is_input_device metafunction.
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/// \param img The image in which the data is read into. Must satisfy is_read_supported metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \throw std::ios_base::failure
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template <typename Device, typename Image, typename FormatTag>
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inline
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void read_image(
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Device& file,
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Image& img,
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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_read_device<FormatTag, Device>,
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is_format_tag<FormatTag>,
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is_read_supported
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<
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typename get_pixel_type<typename Image::view_t>::type,
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FormatTag
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>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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using reader_t =
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typename get_reader<Device, FormatTag, detail::read_and_no_convert>::type;
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reader_t reader = make_reader(file, settings, detail::read_and_no_convert());
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read_image(reader, img);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file It's a device. Must satisfy is_input_device metafunction.
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/// \param img The image in which the data is read into. Must satisfy is_read_supported metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \throw std::ios_base::failure
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template <typename Device, typename Image, typename FormatTag>
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inline
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void read_image(Device& file, Image& img, FormatTag const& tag,
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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_read_device<FormatTag, Device>,
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is_format_tag<FormatTag>,
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is_read_supported
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<
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typename get_pixel_type<typename Image::view_t>::type,
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FormatTag
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>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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using reader_t =
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typename get_reader<Device, FormatTag, detail::read_and_no_convert>::type;
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reader_t reader = make_reader(file, tag, detail::read_and_no_convert());
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read_image(reader, img);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param img The image in which the data is read into. Must satisfy is_read_supported metafunction.
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/// \param settings Specifies read settings depending on the image format.
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/// \throw std::ios_base::failure
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template <typename String, typename Image, typename FormatTag>
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inline
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void read_image(
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String const& file_name,
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Image& img,
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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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is_read_supported
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<
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typename get_pixel_type<typename Image::view_t>::type,
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FormatTag
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>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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using reader_t =
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typename get_reader<String, FormatTag, detail::read_and_no_convert>::type;
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reader_t reader = make_reader(file_name, settings, detail::read_and_no_convert());
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read_image(reader, img);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param img The image in which the data is read into. Must satisfy is_read_supported metafunction.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \throw std::ios_base::failure
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template <typename String, typename Image, typename FormatTag>
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inline
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void read_image(String const& file_name, Image& img, FormatTag const& tag,
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typename std::enable_if
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<
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mp11::mp_and<detail::is_supported_path_spec<String>,
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is_format_tag<FormatTag>,
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is_read_supported
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<
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typename get_pixel_type<typename Image::view_t>::type,
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FormatTag
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>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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using reader_t =
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typename get_reader<String, FormatTag, detail::read_and_no_convert>::type;
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reader_t reader = make_reader(file_name, tag, detail::read_and_no_convert());
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read_image(reader, img);
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}
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///
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template <typename Reader, typename ...Images>
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inline
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void read_image(Reader& reader, any_image<Images...>& images,
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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_dynamic_image_reader<Reader>,
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is_format_tag<typename Reader::format_tag_t>
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>::value
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>::type* /*dummy*/ = nullptr)
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{
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reader.apply(images);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param images Dynamic image (mp11::mp_list). See boost::gil::dynamic_image extension.
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/// \param settings Specifies read settings depending on the image format.
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/// \throw std::ios_base::failure
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template <typename Device, typename ...Images, typename FormatTag>
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inline
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void read_image(
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Device& file,
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any_image<Images...>& images,
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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_read_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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{
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using reader_t = typename get_dynamic_image_reader<Device, FormatTag>::type;
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reader_t reader = make_dynamic_image_reader(file, settings);
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read_image(reader, images);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file It's a device. Must satisfy is_adaptable_input_device metafunction.
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/// \param images Dynamic image (mp11::mp_list). See boost::gil::dynamic_image extension.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \throw std::ios_base::failure
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template <typename Device, typename ...Images, typename FormatTag>
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inline
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void read_image(Device& file, any_image<Images...>& images, FormatTag const& tag,
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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_read_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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{
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using reader_t = typename get_dynamic_image_reader<Device, FormatTag>::type;
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reader_t reader = make_dynamic_image_reader(file, tag);
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read_image(reader, images);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param images Dynamic image (mp11::mp_list). See boost::gil::dynamic_image extension.
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/// \param settings Specifies read settings depending on the image format.
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/// \throw std::ios_base::failure
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template <typename String, typename ...Images, typename FormatTag>
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inline
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void read_image(
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String const& file_name,
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any_image<Images...>& images,
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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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{
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using reader_t = typename get_dynamic_image_reader<String, FormatTag>::type;
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reader_t reader = make_dynamic_image_reader(file_name, settings);
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read_image(reader, images);
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}
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/// \brief Reads an image without conversion. Image memory is allocated.
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/// \param file_name File name. Must satisfy is_supported_path_spec metafunction.
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/// \param images Dynamic image (mp11::mp_list). See boost::gil::dynamic_image extension.
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/// \param tag Defines the image format. Must satisfy is_format_tag metafunction.
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/// \throw std::ios_base::failure
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template <typename String, typename ...Images, typename FormatTag>
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inline
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void read_image(String const& file_name, any_image<Images...>& images, FormatTag const& tag,
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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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{
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using reader_t = typename get_dynamic_image_reader<String, FormatTag>::type;
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reader_t reader = make_dynamic_image_reader(file_name, tag);
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read_image(reader, images);
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}
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}} // namespace boost::gil
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#endif
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