###

#

read_view.hpp
//
// Copyright 2007-2012 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_IO_READ_VIEW_HPP
#define BOOST_GIL_IO_READ_VIEW_HPP
#include <boost/gil/io/base.hpp>
#include <boost/gil/io/conversion_policies.hpp>
#include <boost/gil/io/device.hpp>
#include <boost/gil/io/get_reader.hpp>
#include <boost/gil/io/path_spec.hpp>
#include <boost/gil/detail/mp11.hpp>
#include <type_traits>
namespace boost { namespace gil {
template <typename Reader, typename View>
inline
void read_view(Reader reader, View const& view,
typename std::enable_if
<
mp11::mp_and
<
detail::is_reader<Reader>,
typename is_format_tag<typename Reader::format_tag_t>::type,
typename is_read_supported
<
typename get_pixel_type<View>::type,
typename Reader::format_tag_t
>::type
>::value
>::type* /*dummy*/ = nullptr)
{
reader.check_image_size(view.dimensions());
reader.init_view(view, reader._settings);
reader.apply(view);
}
template <typename Device, typename View, typename FormatTag>
inline
void read_view(
Device& file,
View const& view,
image_read_settings<FormatTag> const& settings,
typename std::enable_if
<
mp11::mp_and
<
detail::is_read_device<FormatTag, Device>,
typename is_format_tag<FormatTag>::type,
typename is_read_supported
<
typename get_pixel_type<View>::type,
FormatTag
>::type
>::value
>::type* /*dummy*/ = nullptr)
{
using reader_t =
typename get_reader<Device, FormatTag, detail::read_and_no_convert>::type;
reader_t reader = make_reader(file, settings, detail::read_and_no_convert());
read_view(reader, view);
}
template <typename Device, typename View, typename FormatTag>
inline
void read_view(Device& file, View const& view, FormatTag const& tag,
typename std::enable_if
<
mp11::mp_and
<
typename is_format_tag<FormatTag>::type,
detail::is_read_device<FormatTag, Device>,
typename is_read_supported
<
typename get_pixel_type<View>::type,
FormatTag
>::type
>::value>::type* /*dummy*/ = nullptr)
{
using reader_t =
typename get_reader<Device, FormatTag, detail::read_and_no_convert>::type;
reader_t reader = make_reader(file, tag, detail::read_and_no_convert());
read_view(reader, view);
}
template <typename String, typename View, typename FormatTag>
inline
void read_view(
String const& file_name,
View const& view,
image_read_settings<FormatTag> const& settings,
typename std::enable_if
<
mp11::mp_and
<
typename detail::is_supported_path_spec<String>::type,
typename is_format_tag<FormatTag>::type,
typename is_read_supported
<
typename get_pixel_type<View>::type,
FormatTag
>::type
>::value
>::type* /*dummy*/ = nullptr)
{
using reader_t =
typename get_reader<String, FormatTag, detail::read_and_no_convert>::type;
reader_t reader = make_reader(file_name, settings, detail::read_and_no_convert());
read_view(reader, view);
}
template <typename String, typename View, typename FormatTag>
inline
void read_view(String const& file_name, View const& view, FormatTag const& tag,
typename std::enable_if
<
mp11::mp_and
<
typename detail::is_supported_path_spec<String>::type,
typename is_format_tag<FormatTag>::type,
typename is_read_supported
<
typename get_pixel_type<View>::type,
FormatTag
>::type
>::value
>::type* /*dummy*/ = nullptr)
{
using reader_t =
typename get_reader<String, FormatTag, detail::read_and_no_convert>::type;
reader_t reader = make_reader(file_name, tag, detail::read_and_no_convert());
read_view(reader, view);
}
}} // namespace boost::gil
#endif
boost::gil::is_read_supported
Definition: base.hpp:78
boost::gil::read_view
void read_view(Reader reader, View const &view, typename std::enable_if< mp11::mp_and< detail::is_reader< Reader >, typename is_format_tag< typename Reader::format_tag_t >::type, typename is_read_supported< typename get_pixel_type< View >::type, typename Reader::format_tag_t >::type >::value >::type *=nullptr)
Reads an image view without conversion. No memory is allocated.
Definition: read_view.hpp:31
boost::gil::view
const image< Pixel, IsPlanar, Alloc >::view_t & view(image< Pixel, IsPlanar, Alloc > &img)
Returns the non-constant-pixel view of an image.
Definition: image.hpp:538