1 //
2 // Copyright 2019-2020 Mateusz Loskot <mateusz at loskot dot net>
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 #include <boost/gil.hpp>
9 #include <boost/gil/extension/numeric/convolve.hpp>
10
11 #include <boost/core/lightweight_test.hpp>
12
13 #include <tuple>
14 #include <type_traits>
15
16 #include "test_fixture.hpp"
17 #include "core/image/test_fixture.hpp"
18
19 namespace gil = boost::gil;
20 namespace fixture = boost::gil::test::fixture;
21
22 struct test_image_1x1_kernel_1x1_identity
23 {
24 template <typename Image>
operator ()test_image_1x1_kernel_1x1_identity25 void operator()(Image const&)
26 {
27 using image_t = Image;
28 auto const img = fixture::create_image<image_t>(1, 1, 7);
29 auto img_out = fixture::create_image<image_t>(1, 1, 0);
30
31 using pixel_t = typename image_t::value_type;
32 using channel_t = typename gil::channel_type<pixel_t>::type;
33 auto const kernel = fixture::create_kernel<channel_t>({1});
34 gil::convolve_rows<pixel_t>(const_view(img), kernel, view(img_out));
35
36 // 1x1 kernel reduces convolution to multiplication
37 BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
38 }
runtest_image_1x1_kernel_1x1_identity39 static void run()
40 {
41 boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_1x1_identity{});
42 }
43 };
44
45 struct test_image_1x1_kernel_3x3_identity
46 {
47 template <typename Image>
operator ()test_image_1x1_kernel_3x3_identity48 void operator()(Image const&)
49 {
50 using image_t = Image;
51 auto const img = fixture::create_image<image_t>(1, 1, 7);
52 auto img_out = fixture::create_image<image_t>(1, 1, 0);
53
54 using pixel_t = typename image_t::value_type;
55 using channel_t = typename gil::channel_type<pixel_t>::type;
56 auto const kernel = fixture::create_kernel<channel_t>({0, 0, 0, 0, 1, 0, 0, 0, 0});
57 gil::convolve_rows<pixel_t>(const_view(img), kernel, view(img_out));
58
59 BOOST_TEST(gil::const_view(img).front() == gil::const_view(img_out).front());
60 }
runtest_image_1x1_kernel_3x3_identity61 static void run()
62 {
63 boost::mp11::mp_for_each<fixture::image_types>(test_image_1x1_kernel_3x3_identity{});
64 }
65 };
66
main()67 int main()
68 {
69 test_image_1x1_kernel_1x1_identity::run();
70 test_image_1x1_kernel_3x3_identity::run();
71
72 return ::boost::report_errors();
73 }
74