106 lines
2.4 KiB
C++
106 lines
2.4 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_GET_WRITER_HPP
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#define BOOST_GIL_IO_GET_WRITER_HPP
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#include <boost/gil/detail/mp11.hpp>
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#include <boost/gil/io/get_write_device.hpp>
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#include <type_traits>
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namespace boost { namespace gil {
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/// \brief Helper metafunction to generate writer type.
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template <typename T, typename FormatTag, class Enable = void>
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struct get_writer {};
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template <typename String, typename FormatTag>
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struct get_writer
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<
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String,
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FormatTag,
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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
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>
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{
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using device_t = typename get_write_device<String, FormatTag>::type;
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using type = writer<device_t, FormatTag>;
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};
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template <typename Device, typename FormatTag>
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struct get_writer
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<
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Device,
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FormatTag,
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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_output_device<FormatTag, Device>,
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is_format_tag<FormatTag>
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>::value
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>::type
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>
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{
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using device_t = typename get_write_device<Device, FormatTag>::type;
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using type = writer<device_t, FormatTag>;
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};
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/// \brief Helper metafunction to generate dynamic image writer type.
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template <typename T, typename FormatTag, class Enable = void>
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struct get_dynamic_image_writer {};
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template <typename String, typename FormatTag>
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struct get_dynamic_image_writer
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<
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String,
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FormatTag,
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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
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>
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{
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using device_t = typename get_write_device<String, FormatTag>::type;
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using type = dynamic_image_writer<device_t, FormatTag>;
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};
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template <typename Device, typename FormatTag>
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struct get_dynamic_image_writer
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<
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Device,
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FormatTag,
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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_write_device<FormatTag, Device>,
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is_format_tag<FormatTag>
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>::value
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>::type
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>
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{
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using device_t = typename get_write_device<Device, FormatTag>::type;
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using type = dynamic_image_writer<device_t, FormatTag>;
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};
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}} // namespace boost::gil
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#endif
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