libs/gil/toolbox/test/channel_view.cpp

   1 //
   2 // Copyright 2013 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 #include <boost/gil.hpp>
   9 #include <boost/gil/extension/toolbox/metafunctions/channel_view.hpp>
  10
  11 #include <boost/test/unit_test.hpp>
  12
  13 #include <type_traits>
  14
  15 namespace bg = boost::gil;
  16
  17 BOOST_AUTO_TEST_SUITE(toolbox_tests)
  18
  19 BOOST_AUTO_TEST_CASE(channel_view_test)
  20 {
  21     using image_t = bg::rgb8_image_t;
  22     image_t img(100, 100);
  23
  24     using kth_channel_view_t
  25         = bg::kth_channel_view_type<0, bg::rgb8_view_t::const_t>::type;
  26     using channel_view_t
  27         = bg::channel_view_type<bg::red_t, bg::rgb8_view_t::const_t>::type;
  28
  29     static_assert(std::is_same
  30         <
  31             kth_channel_view_t,
  32             channel_view_t
  33         >::value,
  34         "");
  35
  36     kth_channel_view_t const kth0 = bg::kth_channel_view<0>(bg::const_view(img));
  37     BOOST_TEST(kth0.num_channels() == 1u);
  38
  39     channel_view_t const red = bg::channel_view<bg::red_t>(bg::const_view(img));
  40     BOOST_TEST(red.num_channels() == 1u);
  41 }
  42
  43 BOOST_AUTO_TEST_SUITE_END()