?????????? ????????? - ??????????????? - /usr/include/boost/gil/extension/toolbox/color_spaces/gray_alpha.hpp
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// // Copyright 2012 Andreas Pokorny // // 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_TOOLBOX_COLOR_SPACES_GRAY_ALPHA_HPP #define BOOST_GIL_EXTENSION_TOOLBOX_COLOR_SPACES_GRAY_ALPHA_HPP #include <boost/gil/color_convert.hpp> #include <boost/gil/gray.hpp> #include <boost/gil/typedefs.hpp> #include <boost/gil/detail/mp11.hpp> namespace boost{ namespace gil { using gray_alpha_t = mp11::mp_list<gray_color_t,alpha_t>; using gray_alpha_layout_t = layout<gray_alpha_t>; using alpha_gray_layout_t = layout<gray_alpha_layout_t, mp11::mp_list_c<int,1,0>>; BOOST_GIL_DEFINE_BASE_TYPEDEFS(8, uint8_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(8s, int8_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(16, uint16_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(16s, int16_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(32, uint32_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(32s, int32_t, alpha_gray) BOOST_GIL_DEFINE_BASE_TYPEDEFS(32f, float32_t, alpha_gray) BOOST_GIL_DEFINE_ALL_TYPEDEFS(8, uint8_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(8s, int8_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(16, uint16_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(16s, int16_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(32, uint32_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(32s, int32_t, gray_alpha) BOOST_GIL_DEFINE_ALL_TYPEDEFS(32f, float32_t, gray_alpha) /// \ingroup ColorConvert /// \brief Gray Alpha to RGBA template <> struct default_color_converter_impl<gray_alpha_t,rgba_t> { template <typename P1, typename P2> void operator()(const P1& src, P2& dst) const { get_color(dst,red_t()) = channel_convert<typename color_element_type<P2, red_t>::type>(get_color(src,gray_color_t())); get_color(dst,green_t())= channel_convert<typename color_element_type<P2, green_t>::type>(get_color(src,gray_color_t())); get_color(dst,blue_t()) = channel_convert<typename color_element_type<P2, blue_t>::type>(get_color(src,gray_color_t())); get_color(dst,alpha_t()) = channel_convert<typename color_element_type<P2, alpha_t>::type>(get_color(src,alpha_t())); } }; /// \brief Gray Alpha to RGB template <> struct default_color_converter_impl<gray_alpha_t,rgb_t> { template <typename P1, typename P2> void operator()(const P1& src, P2& dst) const { get_color(dst,red_t()) = channel_convert<typename color_element_type<P2, red_t>::type>( channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) ); get_color(dst,green_t()) = channel_convert<typename color_element_type<P2, green_t>::type>( channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) ); get_color(dst,blue_t()) = channel_convert<typename color_element_type<P2, blue_t>::type>( channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) ); } }; /// \brief Gray Alpha to Gray template <> struct default_color_converter_impl<gray_alpha_t,gray_t> { template <typename P1, typename P2> void operator()(const P1& src, P2& dst) const { get_color(dst,gray_color_t()) = channel_convert<typename color_element_type<P2, gray_color_t>::type>( channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) ); } }; } // namespace gil } // namespace boost #endif
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