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- //
- // Copyright 2007-2008 Christian Henning, Andreas Pokorny, Lubomir Bourdev
- //
- // Distributed under the Boost Software License, Version 1.0
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- //
- #ifndef BOOST_GIL_EXTENSION_IO_JPEG_DETAIL_SUPPORTED_TYPES_HPP
- #define BOOST_GIL_EXTENSION_IO_JPEG_DETAIL_SUPPORTED_TYPES_HPP
- #include <boost/gil/extension/io/jpeg/tags.hpp>
- #include <boost/gil/channel.hpp>
- #include <boost/gil/color_base.hpp>
- #include <type_traits>
- namespace boost { namespace gil { namespace detail {
- // Read support
- template< jpeg_color_space::type ColorSpace >
- struct jpeg_rw_support_base
- {
- static const jpeg_color_space::type _color_space = ColorSpace;
- };
- template< typename Channel
- , typename ColorSpace
- >
- struct jpeg_read_support : read_support_false
- , jpeg_rw_support_base< JCS_UNKNOWN > {};
- template<>
- struct jpeg_read_support<uint8_t
- , rgb_t
- > : read_support_true
- , jpeg_rw_support_base< JCS_RGB > {};
- template<>
- struct jpeg_read_support<uint8_t
- , cmyk_t
- > : read_support_true
- , jpeg_rw_support_base< JCS_CMYK > {};
- template<>
- struct jpeg_read_support<uint8_t
- , gray_t
- > : read_support_true
- , jpeg_rw_support_base< JCS_GRAYSCALE > {};
- // Write support
- template< typename Channel
- , typename ColorSpace
- >
- struct jpeg_write_support : write_support_false
- , jpeg_rw_support_base< JCS_UNKNOWN > {};
- template<>
- struct jpeg_write_support<uint8_t
- , gray_t
- > : write_support_true
- , jpeg_rw_support_base< JCS_GRAYSCALE > {};
- template<>
- struct jpeg_write_support<uint8_t
- , rgb_t
- > : write_support_true
- , jpeg_rw_support_base< JCS_RGB > {};
- template<>
- struct jpeg_write_support<uint8_t
- , cmyk_t
- > : write_support_true
- , jpeg_rw_support_base< JCS_CMYK > {};
- } // namespace detail
- template<typename Pixel>
- struct is_read_supported<Pixel, jpeg_tag>
- : std::integral_constant
- <
- bool,
- detail::jpeg_read_support
- <
- typename channel_type<Pixel>::type,
- typename color_space_type<Pixel>::type
- >::is_supported
- >
- {
- using parent_t = detail::jpeg_read_support
- <
- typename channel_type<Pixel>::type,
- typename color_space_type<Pixel>::type
- >;
- static const typename jpeg_color_space::type _color_space = parent_t::_color_space;
- };
- template<typename Pixel>
- struct is_write_supported<Pixel, jpeg_tag>
- : std::integral_constant
- <
- bool,
- detail::jpeg_write_support
- <
- typename channel_type<Pixel>::type,
- typename color_space_type<Pixel>::type
- >::is_supported
- >
- {};
- } // namespace gil
- } // namespace boost
- #endif
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