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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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