Generic Image Library: rgba.hpp Source File

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rgba.hpp
1//
2// Copyright 2005-2007 Adobe Systems Incorporated
3//
4// Distributed under the Boost Software License, Version 1.0
5// See accompanying file LICENSE_1_0.txt or copy at
6// http://www.boost.org/LICENSE_1_0.txt
7//
8#ifndef BOOST_GIL_RGBA_HPP
9#define BOOST_GIL_RGBA_HPP
10
11#include <boost/gil/planar_pixel_iterator.hpp>
12#include <boost/gil/rgb.hpp>
13#include <boost/gil/detail/mp11.hpp>
14
15#include <cstddef>
16#include <type_traits>
17
18namespace boost { namespace gil {
19
22 struct alpha_t {};
23
25using rgba_t =mp11::mp_list<red_t, green_t, blue_t, alpha_t>;
26
28using rgba_layout_t = layout<rgba_t>;
29
31using bgra_layout_t = layout<rgba_t, mp11::mp_list_c<int, 2, 1, 0, 3>>;
32
34using argb_layout_t = layout<rgba_t, mp11::mp_list_c<int, 1, 2, 3, 0>>;
35
37using abgr_layout_t = layout<rgba_t, mp11::mp_list_c<int, 3, 2, 1, 0>>;
38
41template <typename ChannelPtr>
42 inline auto planar_rgba_view(std::size_t width, std::size_t height,
43 ChannelPtr r, ChannelPtr g, ChannelPtr b, ChannelPtr a,
44 std::ptrdiff_t rowsize_in_bytes)
45 -> typename type_from_x_iterator<planar_pixel_iterator<ChannelPtr, rgba_t> >::view_t
46{
47 using pixel_iterator_t = planar_pixel_iterator<ChannelPtr, rgba_t>;
48 using view_t = typename type_from_x_iterator<pixel_iterator_t>::view_t;
49 using locator_t = typename view_t::locator;
50
51 locator_t loc(pixel_iterator_t(r, g, b, a), rowsize_in_bytes);
52 return view_t(width, height, loc);
53}
54
55}} // namespace boost::gil
56
57#endif
boost::gil::planar_rgba_view
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
from raw RGBA planar data
Definition rgba.hpp:42
boost
defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)
Definition algorithm.hpp:36
boost::gil::alpha_t
Alpha.
Definition rgba.hpp:22
boost::gil::layout
Represents a color space and ordering of channels in memory.
Definition utilities.hpp:268
boost::gil::planar_pixel_iterator
An iterator over planar pixels. Models HomogeneousColorBaseConcept, PixelIteratorConcept,...
Definition planar_pixel_iterator.hpp:58
boost::gil::type_from_x_iterator
Given a pixel iterator defining access to pixels along a row, returns the types of the corresponding ...
Definition metafunctions.hpp:303