1 //
2 // Copyright 2013 Christian Henning
3 // Copyright 2020 Mateusz Loskot <mateusz@loskot.net>
4 //
5 // Distributed 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.hpp>
10 #include <boost/gil/extension/toolbox/color_spaces/hsl.hpp>
11
12 #include <boost/core/lightweight_test.hpp>
13
14 #include <cstdint>
15
16 #include "test_utility_output_stream.hpp"
17
18 namespace gil = boost::gil;
19
test_rgb_to_hsl()20 void test_rgb_to_hsl()
21 {
22 gil::rgb8_pixel_t p{128, 0, 128};
23 gil::hsl32f_pixel_t h;
24 gil::color_convert(p, h);
25
26 BOOST_TEST_GT(gil::get_color(h, gil::hsl_color_space::hue_t()), 0.8); // 0.83333331
27 BOOST_TEST_EQ(gil::get_color(h, gil::hsl_color_space::saturation_t()), 1.0); // 1.00000000
28 BOOST_TEST_GT(gil::get_color(h, gil::hsl_color_space::lightness_t()), 0.25); // 0.25098040
29 }
30
test_hsl_to_rgb()31 void test_hsl_to_rgb()
32 {
33 gil::rgb8_pixel_t p(64, 0, 64);
34 gil::hsl32f_pixel_t h;
35 gil::color_convert(p, h);
36
37 gil::rgb8_pixel_t b;
38 gil::color_convert(h, b);
39 BOOST_TEST_EQ(b, p);
40 }
41
test_image_assign_hsl()42 void test_image_assign_hsl()
43 {
44 std::ptrdiff_t const w = 320;
45 std::ptrdiff_t const h = 240;
46 gil::hsl32f_image_t hsl_img(w, h);
47
48 for (std::ptrdiff_t y = 0; y < h; y++)
49 {
50 gil::hsl32f_view_t::x_iterator hsl_x_it = view(hsl_img).row_begin(y);
51 float v = static_cast<float>(h - y) / h;
52 for (std::ptrdiff_t x = 0; x < w; x++)
53 {
54 float const hue = (x + 1.f) / w;
55 gil::hsl32f_pixel_t const p(hue, 1.0, v);
56 hsl_x_it[x] = p;
57 BOOST_TEST_EQ(gil::view(hsl_img)(x, y), p);
58 }
59 }
60 }
61
test_copy_pixels_rgb_to_hsl()62 void test_copy_pixels_rgb_to_hsl()
63 {
64 gil::rgb8_image_t rgb_img(320, 240);
65 gil::rgb8_pixel_t rgb_pix(64, 32, 64);
66 gil::fill_pixels(view(rgb_img), rgb_pix);
67 gil::hsl32f_image_t hsl_img(view(rgb_img).dimensions());
68 gil::copy_pixels(gil::color_converted_view<gil::hsl32f_pixel_t>(view(rgb_img)), view(hsl_img));
69
70 auto view = gil::view(hsl_img);
71 for (auto it = view.begin(), end = view.end(); it != end; ++it)
72 {
73 gil::rgb8_pixel_t p;
74 gil::color_convert(*it, p);
75 BOOST_TEST_EQ(p, rgb_pix);
76 }
77 }
78
main()79 int main()
80 {
81 test_rgb_to_hsl();
82 test_hsl_to_rgb();
83 test_image_assign_hsl();
84 test_copy_pixels_rgb_to_hsl();
85
86 return ::boost::report_errors();
87 }
88