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// // Copyright 2008 Christian Henning // // 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_BMP_DETAIL_SUPPORTED_TYPES_HPP #define BOOST_GIL_EXTENSION_IO_BMP_DETAIL_SUPPORTED_TYPES_HPP #include <boost/gil/extension/io/bmp/tags.hpp> #include <boost/gil/bit_aligned_pixel_reference.hpp> #include <boost/gil/channel.hpp> #include <boost/gil/color_base.hpp> #include <boost/gil/packed_pixel.hpp> #include <boost/gil/io/base.hpp> #include <type_traits> namespace boost { namespace gil { namespace detail { // Read support template< typename Channel , typename ColorSpace > struct bmp_read_support : read_support_false { static const bmp_bits_per_pixel::type bpp = 0; }; template< typename BitField , bool Mutable > struct bmp_read_support< packed_dynamic_channel_reference< BitField , 1 , Mutable > , gray_t > : read_support_true { static const bmp_bits_per_pixel::type bpp = 1; }; template< typename BitField , bool Mutable > struct bmp_read_support< packed_dynamic_channel_reference< BitField , 4 , Mutable > , gray_t > : read_support_true { static const bmp_bits_per_pixel::type bpp = 4; }; template<> struct bmp_read_support<uint8_t , gray_t > : read_support_true { static const bmp_bits_per_pixel::type bpp = 8; }; template<> struct bmp_read_support<uint8_t , rgb_t > : read_support_true { static const bmp_bits_per_pixel::type bpp = 24; }; template<> struct bmp_read_support<uint8_t , rgba_t > : read_support_true { static const bmp_bits_per_pixel::type bpp = 32; }; // Write support template< typename Channel , typename ColorSpace > struct bmp_write_support : write_support_false {}; template<> struct bmp_write_support<uint8_t , rgb_t > : write_support_true {}; template<> struct bmp_write_support<uint8_t , rgba_t > : write_support_true {}; } // namespace detail template<typename Pixel> struct is_read_supported<Pixel, bmp_tag> : std::integral_constant < bool, detail::bmp_read_support < typename channel_type<Pixel>::type, typename color_space_type<Pixel>::type >::is_supported > { using parent_t = detail::bmp_read_support < typename channel_type<Pixel>::type, typename color_space_type<Pixel>::type >; static const typename bmp_bits_per_pixel::type bpp = parent_t::bpp; }; template<typename Pixel> struct is_write_supported<Pixel, bmp_tag> : std::integral_constant < bool, detail::bmp_write_support < typename channel_type<Pixel>::type, typename color_space_type<Pixel>::type >::is_supported > {}; } // namespace gil } // namespace boost #endif
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