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1 | // |
2 | // Copyright 2005-2007 Adobe Systems Incorporated | |
3 | // Copyright 2018 Mateusz Loskot <mateusz at loskot dot net> | |
4 | // | |
5 | // Distribtted under the Boost Software License, Version 1.0 | |
6 | // See accompanying file LICENSE_1_0.txt or copy at | |
7 | // http://www.boost.org/LICENSE_1_0.txt | |
8 | // | |
9 | #include <boost/gil/channel.hpp> | |
10 | #include <boost/gil/channel_algorithm.hpp> | |
11 | #include <boost/gil/typedefs.hpp> | |
12 | #include <cstdint> | |
13 | #include <limits> | |
14 | ||
15 | #define BOOST_TEST_MODULE test_scoped_channel_value | |
16 | #include "unit_test.hpp" | |
17 | ||
18 | namespace gil = boost::gil; | |
19 | ||
20 | struct int_minus_value { static std::int8_t apply() { return -64; } }; | |
21 | struct int_plus_value { static std::int8_t apply() { return 64; } }; | |
22 | using fixture = gil::scoped_channel_value | |
23 | < | |
24 | std::uint8_t, int_minus_value, int_plus_value | |
25 | >; | |
26 | ||
27 | BOOST_AUTO_TEST_CASE(scoped_channel_value_default_constructor) | |
28 | { | |
29 | fixture f; | |
30 | std::uint8_t v = f; | |
31 | BOOST_TEST(v == std::uint8_t{0}); | |
32 | } | |
33 | ||
34 | BOOST_AUTO_TEST_CASE(scoped_channel_value_user_defined_constructors) | |
35 | { | |
36 | fixture f{1}; | |
37 | std::uint8_t v = f; | |
38 | BOOST_TEST(v == std::uint8_t{1}); | |
39 | } | |
40 | ||
41 | BOOST_AUTO_TEST_CASE(scoped_channel_value_copy_constructors) | |
42 | { | |
43 | fixture f1{128}; | |
44 | fixture f2{f1}; | |
45 | ||
46 | BOOST_TEST(std::uint8_t{f1} == std::uint8_t{128}); | |
47 | BOOST_TEST(std::uint8_t{f1} == std::uint8_t{f2}); | |
48 | } | |
49 | ||
50 | BOOST_AUTO_TEST_CASE(scoped_channel_value_assignment) | |
51 | { | |
52 | fixture f; | |
53 | f = 64; | |
54 | std::uint8_t v = f; | |
55 | BOOST_TEST(v == std::uint8_t{64}); | |
56 | } | |
57 | ||
58 | BOOST_AUTO_TEST_CASE(scoped_channel_value_float32_t) | |
59 | { | |
60 | auto const tolerance = btt::tolerance(std::numeric_limits<float>::epsilon()); | |
61 | // min | |
62 | BOOST_TEST(gil::float_point_zero<float>::apply() == 0.0, tolerance); | |
63 | BOOST_TEST(gil::channel_traits<gil::float32_t>::min_value() == 0.0); | |
64 | // max | |
65 | BOOST_TEST(gil::float_point_one<float>::apply() == 1.0, tolerance); | |
66 | BOOST_TEST(gil::channel_traits<gil::float32_t>::max_value() == 1.0); | |
67 | } | |
68 | ||
69 | BOOST_AUTO_TEST_CASE(scoped_channel_value_float64_t) | |
70 | { | |
71 | auto const tolerance = btt::tolerance(std::numeric_limits<double>::epsilon()); | |
72 | // min | |
73 | BOOST_TEST(gil::float_point_zero<double>::apply() == 0.0, tolerance); | |
74 | BOOST_TEST(gil::channel_traits<gil::float64_t>::min_value() == 0.0, tolerance); | |
75 | // max | |
76 | BOOST_TEST(gil::float_point_one<double>::apply() == 1.0, tolerance); | |
77 | BOOST_TEST(gil::channel_traits<gil::float64_t>::max_value() == 1.0, tolerance); | |
78 | } | |
79 | ||
80 | BOOST_AUTO_TEST_CASE(scoped_channel_value_halfs) | |
81 | { | |
82 | // Create a double channel with range [-0.5 .. 0.5] | |
83 | struct minus_half { static double apply() { return -0.5; } }; | |
84 | struct plus_half { static double apply() { return 0.5; } }; | |
85 | using halfs = gil::scoped_channel_value<double, minus_half, plus_half>; | |
86 | ||
87 | auto const tolerance = btt::tolerance(std::numeric_limits<double>::epsilon()); | |
88 | BOOST_TEST(gil::channel_traits<halfs>::min_value() == minus_half::apply(), tolerance); | |
89 | BOOST_TEST(gil::channel_traits<halfs>::max_value() == plus_half::apply(), tolerance); | |
90 | // scoped channel maximum should map to the maximum | |
91 | BOOST_TEST(gil::channel_convert<std::uint16_t>( | |
92 | gil::channel_traits<halfs>::max_value()) == 65535, tolerance); | |
93 | } |