63e88f80
 Hu Chunming
提交三方库
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//
// Copyright 2005-2007 Adobe Systems Incorporated
//
// 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_RGBA_HPP
#define BOOST_GIL_RGBA_HPP
#include <boost/gil/planar_pixel_iterator.hpp>
#include <boost/gil/rgb.hpp>
#include <boost/gil/detail/mp11.hpp>
#include <cstddef>
#include <type_traits>
namespace boost { namespace gil {
/// \ingroup ColorNameModel
/// \brief Alpha
struct alpha_t {};
/// \ingroup ColorSpaceModel
using rgba_t =mp11::mp_list<red_t, green_t, blue_t, alpha_t>;
/// \ingroup LayoutModel
using rgba_layout_t = layout<rgba_t>;
/// \ingroup LayoutModel
using bgra_layout_t = layout<rgba_t, mp11::mp_list_c<int, 2, 1, 0, 3>>;
/// \ingroup LayoutModel
using argb_layout_t = layout<rgba_t, mp11::mp_list_c<int, 1, 2, 3, 0>>;
/// \ingroup LayoutModel
using abgr_layout_t = layout<rgba_t, mp11::mp_list_c<int, 3, 2, 1, 0>>;
/// \ingroup ImageViewConstructors
/// \brief from raw RGBA planar data
template <typename ChannelPtr>
inline auto planar_rgba_view(std::size_t width, std::size_t height,
ChannelPtr r, ChannelPtr g, ChannelPtr b, ChannelPtr a,
std::ptrdiff_t rowsize_in_bytes)
-> typename type_from_x_iterator<planar_pixel_iterator<ChannelPtr, rgba_t> >::view_t
{
using pixel_iterator_t = planar_pixel_iterator<ChannelPtr, rgba_t>;
using view_t = typename type_from_x_iterator<pixel_iterator_t>::view_t;
using locator_t = typename view_t::locator;
locator_t loc(pixel_iterator_t(r, g, b, a), rowsize_in_bytes);
return view_t(width, height, loc);
}
}} // namespace boost::gil
#endif
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