Boost GIL

read_and_convert_view.hpp
1 //
2 // Copyright 2007-2012 Christian Henning, Andreas Pokorny, Lubomir Bourdev
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_IO_READ_AND_CONVERT_VIEW_HPP
9 #define BOOST_GIL_IO_READ_AND_CONVERT_VIEW_HPP
10 
11 #include <boost/gil/io/base.hpp>
12 #include <boost/gil/io/conversion_policies.hpp>
13 #include <boost/gil/io/device.hpp>
14 #include <boost/gil/io/get_reader.hpp>
15 #include <boost/gil/io/path_spec.hpp>
16 #include <boost/gil/detail/mp11.hpp>
17 
18 #include <type_traits>
19 
20 namespace boost{ namespace gil {
21 
23 
30 template <typename Reader, typename View>
31 inline
32 void read_and_convert_view(Reader& reader, View const& view,
33  typename std::enable_if
34  <
35  mp11::mp_and
36  <
37  detail::is_reader<Reader>,
38  is_format_tag<typename Reader::format_tag_t>
39  >::value
40  >::type* /*dummy*/ = nullptr)
41 {
42  reader.check_image_size(view.dimensions());
43  reader.init_view(view, reader._settings);
44  reader.apply(view);
45 }
46 
53 template <typename Device, typename View, typename ColorConverter, typename FormatTag>
54 inline
55 void read_and_convert_view(
56  Device& device,
57  View const& view,
58  image_read_settings<FormatTag> const& settings,
59  ColorConverter const& cc,
60  typename std::enable_if
61  <
62  mp11::mp_and
63  <
64  detail::is_read_device<FormatTag, Device>,
65  is_format_tag<FormatTag>
66  >::value
67  >::type* /*dummy*/ = nullptr)
68 {
69  using read_and_convert_t = detail::read_and_convert<ColorConverter>;
70  using reader_t = typename get_reader<Device, FormatTag, read_and_convert_t>::type;
71 
72  reader_t reader = make_reader(device, settings, read_and_convert_t{cc});
73  read_and_convert_view(reader, view);
74 }
75 
82 template <typename String, typename View, typename ColorConverter, typename FormatTag>
83 inline
84 void read_and_convert_view(
85  String const& file_name,
86  View const& view,
87  image_read_settings<FormatTag> const& settings,
88  ColorConverter const& cc,
89  typename std::enable_if
90  <
91  mp11::mp_and
92  <
93  is_format_tag<FormatTag>,
94  detail::is_supported_path_spec<String>
95  >::value
96  >::type* /*dummy*/ = nullptr)
97 {
98  using read_and_convert_t = detail::read_and_convert<ColorConverter>;
99  using reader_t = typename get_reader<String, FormatTag, read_and_convert_t>::type;
100 
101  reader_t reader = make_reader(file_name, settings, read_and_convert_t{cc});
102  read_and_convert_view(reader, view);
103 }
104 
111 template <typename String, typename View, typename ColorConverter, typename FormatTag>
112 inline
113 void read_and_convert_view(
114  String const& file_name,
115  View const& view,
116  ColorConverter const& cc,
117  FormatTag const& tag,
118  typename std::enable_if
119  <
120  mp11::mp_and
121  <
122  is_format_tag<FormatTag>,
123  detail::is_supported_path_spec<String>
124  >::value
125  >::type* /*dummy*/ = nullptr)
126 {
127  using read_and_convert_t = detail::read_and_convert<ColorConverter>;
128  using reader_t = typename get_reader<String, FormatTag, read_and_convert_t>::type;
129 
130  reader_t reader = make_reader(file_name, tag, read_and_convert_t{cc});
131  read_and_convert_view(reader, view);
132 }
133 
140 template <typename Device, typename View, typename ColorConverter, typename FormatTag>
141 inline
142 void read_and_convert_view(
143  Device& device,
144  View const& view,
145  ColorConverter const& cc,
146  FormatTag const& tag,
147  typename std::enable_if
148  <
149  mp11::mp_and
150  <
151  detail::is_read_device<FormatTag, Device>,
152  is_format_tag<FormatTag>
153  >::value
154  >::type* /*dummy*/ = nullptr)
155 {
156  using read_and_convert_t = detail::read_and_convert<ColorConverter>;
157  using reader_t = typename get_reader<Device, FormatTag, read_and_convert_t>::type;
158 
159  reader_t reader = make_reader(device, tag, read_and_convert_t{cc});
160  read_and_convert_view(reader, view);
161 }
162 
168 template <typename String, typename View, typename FormatTag>
169 inline
170 void read_and_convert_view(
171  String const& file_name,
172  View const& view,
173  image_read_settings<FormatTag> const& settings,
174  typename std::enable_if
175  <
176  mp11::mp_and
177  <
178  is_format_tag<FormatTag>,
179  detail::is_supported_path_spec<String>
180  >::value
181  >::type* /*dummy*/ = nullptr)
182 {
183  using read_and_convert_t = detail::read_and_convert<default_color_converter>;
184  using reader_t = typename get_reader<String, FormatTag, read_and_convert_t>::type;
185 
186  reader_t reader = make_reader(file_name, settings, read_and_convert_t{});
187  read_and_convert_view(reader, view);
188 }
189 
195 template <typename Device, typename View, typename FormatTag>
196 inline
197 void read_and_convert_view(
198  Device& device,
199  View const& view,
200  image_read_settings<FormatTag> const& settings,
201  typename std::enable_if
202  <
203  mp11::mp_and
204  <
205  detail::is_read_device<FormatTag, Device>,
206  is_format_tag<FormatTag>
207  >::value
208  >::type* /*dummy*/ = nullptr)
209 {
210  using read_and_convert_t = detail::read_and_convert<default_color_converter>;
211  using reader_t = typename get_reader<Device, FormatTag, read_and_convert_t>::type;
212 
213  reader_t reader = make_reader(device, settings, read_and_convert_t{});
214  read_and_convert_view(reader, view);
215 }
216 
222 template <typename String, typename View, typename FormatTag>
223 inline
224 void read_and_convert_view(
225  String const& file_name,
226  View const& view,
227  FormatTag const& tag,
228  typename std::enable_if
229  <
230  mp11::mp_and
231  <
232  is_format_tag<FormatTag>,
233  detail::is_supported_path_spec<String>
234  >::value
235  >::type* /*dummy*/ = nullptr)
236 {
237  using read_and_convert_t = detail::read_and_convert<default_color_converter>;
238  using reader_t = typename get_reader<String, FormatTag, read_and_convert_t>::type;
239 
240  reader_t reader = make_reader(file_name, tag, read_and_convert_t{});
241  read_and_convert_view(reader, view);
242 }
243 
249 template <typename Device, typename View, typename FormatTag>
250 inline
251 void read_and_convert_view(
252  Device& device,
253  View const& view,
254  FormatTag const& tag,
255  typename std::enable_if
256  <
257  mp11::mp_and
258  <
259  detail::is_read_device<FormatTag, Device>,
260  is_format_tag<FormatTag>
261  >::value
262  >::type* /*dummy*/ = nullptr)
263 {
264  using read_and_convert_t = detail::read_and_convert<default_color_converter>;
265  using reader_t = typename get_reader<Device, FormatTag, read_and_convert_t>::type;
266 
267  reader_t reader = make_reader(device, tag, read_and_convert_t{});
268  read_and_convert_view(reader, view);
269 }
270 
271 }} // namespace boost::gill
272 
273 #endif
boost::gil::read_and_convert_view
void read_and_convert_view(Reader &reader, View const &view, typename std::enable_if< mp11::mp_and< detail::is_reader< Reader >, is_format_tag< typename Reader::format_tag_t > >::value >::type *=nullptr)
Reads and color-converts an image view. No memory is allocated.
Definition: read_and_convert_view.hpp:32
boost::gil::view
auto view(image< Pixel, IsPlanar, Alloc > &img) -> typename image< Pixel, IsPlanar, Alloc >::view_t const &
Returns the non-constant-pixel view of an image.
Definition: image.hpp:565
boost
defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)
Definition: algorithm.hpp:36
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