Generic Image Library: get_reader.hpp Source File

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get_reader.hpp
1//
2// Copyright 2012 Christian Henning
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_GET_READER_HPP
9#define BOOST_GIL_IO_GET_READER_HPP
10
11#include <boost/gil/io/get_read_device.hpp>
12#include <boost/gil/detail/mp11.hpp>
13
14#include <type_traits>
15
16namespace boost { namespace gil {
17
19template
20<
21 typename T,
22 typename FormatTag,
23 typename ConversionPolicy,
24 class Enable = void
25>
26 struct get_reader {};
27
28template <typename String, typename FormatTag, typename ConversionPolicy>
29struct get_reader
30<
31 String,
32 FormatTag,
33 ConversionPolicy,
34 typename std::enable_if
35 <
36 mp11::mp_and
37 <
38 detail::is_supported_path_spec<String>,
39 is_format_tag<FormatTag>
40 >::value
41 >::type
42>
43{
44 using device_t = typename get_read_device<String, FormatTag>::type;
45 using type = reader<device_t, FormatTag, ConversionPolicy>;
46};
47
48template <typename Device, typename FormatTag, typename ConversionPolicy>
49struct get_reader
50<
51 Device,
52 FormatTag,
53 ConversionPolicy,
54 typename std::enable_if
55 <
56 mp11::mp_and
57 <
58 detail::is_adaptable_input_device<FormatTag, Device>,
59 is_format_tag<FormatTag>
60 >::value
61 >::type
62>
63{
64 using device_t = typename get_read_device<Device, FormatTag>::type;
65 using type = reader<device_t, FormatTag, ConversionPolicy>;
66};
67
69template <typename T, typename FormatTag, class Enable = void>
70 struct get_dynamic_image_reader
71{
72};
73
74template <typename String, typename FormatTag>
75struct get_dynamic_image_reader
76<
77 String,
78 FormatTag,
79 typename std::enable_if
80 <
81 mp11::mp_and
82 <
83 detail::is_supported_path_spec<String>,
84 is_format_tag<FormatTag>
85 >::value
86 >::type
87>
88{
89 using device_t = typename get_read_device<String, FormatTag>::type;
90 using type = dynamic_image_reader<device_t, FormatTag>;
91};
92
93template <typename Device, typename FormatTag>
94struct get_dynamic_image_reader
95<
96 Device,
97 FormatTag,
98 typename std::enable_if
99 <
100 mp11::mp_and
101 <
102 detail::is_adaptable_input_device<FormatTag, Device>,
103 is_format_tag<FormatTag>
104 >::value
105 >::type
106>
107{
108 using device_t = typename get_read_device<Device, FormatTag>::type;
109 using type = dynamic_image_reader<device_t, FormatTag>;
110};
111
113template <typename T, typename FormatTag, class Enable = void>
114 struct get_reader_backend
115{
116};
117
118template <typename String, typename FormatTag>
119struct get_reader_backend
120<
121 String,
122 FormatTag,
123 typename std::enable_if
124 <
125 mp11::mp_and
126 <
127 detail::is_supported_path_spec<String>,
128 is_format_tag<FormatTag>
129 >::value
130 >::type
131>
132{
133 using device_t = typename get_read_device<String, FormatTag>::type;
134 using type = reader_backend<device_t, FormatTag>;
135};
136
137template <typename Device, typename FormatTag>
138struct get_reader_backend
139<
140 Device,
141 FormatTag,
142 typename std::enable_if
143 <
144 mp11::mp_and
145 <
146 detail::is_adaptable_input_device<FormatTag, Device>,
147 is_format_tag<FormatTag>
148 >::value
149 >::type
150>
151{
152 using device_t = typename get_read_device<Device, FormatTag>::type;
153 using type = reader_backend<device_t, FormatTag>;
154};
155
157template <typename T, typename FormatTag>
158 struct get_scanline_reader
159{
160 using device_t = typename get_read_device<T, FormatTag>::type;
161 using type = scanline_reader<device_t, FormatTag>;
162};
163
164} // namespace gil
165} // namespace boost
166
167#endif
boost
defined(BOOST_NO_CXX17_HDR_MEMORY_RESOURCE)
Definition algorithm.hpp:36
boost::gil::get_dynamic_image_reader
Helper metafunction to generate dynamic image reader type.
Definition get_reader.hpp:71
boost::gil::get_reader_backend
Helper metafunction to generate image backend type.
Definition get_reader.hpp:115
boost::gil::get_reader
Helper metafunction to generate image reader type.
Definition get_reader.hpp:26
boost::gil::get_scanline_reader
Helper metafunction to generate image scanline_reader type.
Definition get_reader.hpp:159