ceph/src/boost/libs/gil/test/core/image_view/subimage_view.cpp

   1 //
   2 // Copyright 2019 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
  10 #define BOOST_TEST_MODULE test_image_view_subimage_view
  11 #include "unit_test.hpp"
  12 #include "unit_test_utility.hpp"
  13 #include "core/image/test_fixture.hpp"
  14
  15 namespace gil = boost::gil;
  16 namespace fixture = boost::gil::test::fixture;
  17
  18 BOOST_AUTO_TEST_SUITE(subimage_view)
  19
  20 BOOST_AUTO_TEST_CASE_TEMPLATE(subimage_equals_image, Image, fixture::image_types)
  21 {
  22     auto i0 = fixture::create_image<Image>(4, 4, 128);
  23     auto const v0 = gil::const_view(i0);
  24     BOOST_TEST(v0.dimensions().x == 4);
  25     BOOST_TEST(v0.dimensions().y == 4);
  26
  27     // request with 2 x point_t values
  28     {
  29         auto v1 = gil::subimage_view(gil::view(i0), {0, 0}, i0.dimensions());
  30         BOOST_TEST(v0.dimensions() == v1.dimensions());
  31         BOOST_TEST(gil::equal_pixels(v0, v1));
  32     }
  33     // request with 4 x dimension values
  34     {
  35         auto v1 = gil::subimage_view(gil::view(i0), 0, 0, i0.dimensions().x, i0.dimensions().y);
  36         BOOST_TEST(v0.dimensions() == v1.dimensions());
  37         BOOST_TEST(gil::equal_pixels(v0, v1));
  38     }
  39 }
  40
  41 BOOST_AUTO_TEST_CASE_TEMPLATE(subimage_equals_image_quadrants, Image, fixture::image_types)
  42 {
  43     auto i0 = fixture::create_image<Image>(4, 4, 0);
  44     auto v0 = gil::view(i0);
  45     // create test image and set values of pixels in:
  46     //  quadrant 1
  47     auto const i1 = fixture::create_image<Image>(2, 2, 255);
  48     v0[2] = v0[3] = v0[6] = v0[7] = gil::const_view(i1)[0];
  49     //  quadrant 2
  50     auto const i2 = fixture::create_image<Image>(2, 2, 128);
  51     v0[0] = v0[1] = v0[4] = v0[5] = gil::const_view(i2)[0];
  52     //  quadrant 3
  53     auto const i3 = fixture::create_image<Image>(2, 2, 64);
  54     v0[8] = v0[9] = v0[12] = v0[13] = gil::const_view(i3)[0];
  55     //  quadrant 4
  56     auto const i4 = fixture::create_image<Image>(2, 2, 32);
  57     v0[10] = v0[11] = v0[14] = v0[15] = gil::const_view(i4)[0];
  58
  59     auto v1 = gil::subimage_view(gil::view(i0), { 2, 0 }, i0.dimensions() / 2);
  60     BOOST_TEST(gil::equal_pixels(v1, gil::const_view(i1)));
  61     auto v2 = gil::subimage_view(gil::view(i0), { 0, 0 }, i0.dimensions() / 2);
  62     BOOST_TEST(gil::equal_pixels(v2, gil::const_view(i2)));
  63     auto v3 = gil::subimage_view(gil::view(i0), { 0, 2 }, i0.dimensions() / 2);
  64     BOOST_TEST(gil::equal_pixels(v3, gil::const_view(i3)));
  65     auto v4 = gil::subimage_view(gil::view(i0), { 2, 2 }, i0.dimensions() / 2);
  66     BOOST_TEST(gil::equal_pixels(v4, gil::const_view(i4)));
  67 }
  68
  69 BOOST_AUTO_TEST_SUITE_END()