libs/gil/toolbox/test/channel_type.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/extension/toolbox/metafunctions/channel_type.hpp>
   9 #include <boost/gil/extension/toolbox/metafunctions/is_bit_aligned.hpp>
  10
  11 #include <boost/gil/channel.hpp> // boost::is_integral<packed_dynamic_channel_reference<...>>
  12
  13 #include <boost/test/unit_test.hpp>
  14
  15 #include <type_traits>
  16
  17 namespace bg = boost::gil;
  18
  19 BOOST_AUTO_TEST_SUITE(toolbox_tests)
  20
  21 BOOST_AUTO_TEST_CASE(channel_type_test)
  22 {
  23     static_assert(std::is_same
  24         <
  25             unsigned char,
  26             bg::channel_type<bg::rgb8_pixel_t>::type
  27         >::value, "");
  28
  29     // float32_t is a scoped_channel_value object
  30     static_assert(std::is_same
  31         <
  32             bg::float32_t,
  33             bg::channel_type<bg::rgba32f_pixel_t>::type
  34         >::value, "");
  35
  36     // channel_type for bit_aligned images doesn't work with standard gil.
  37     using image_t = bg::bit_aligned_image4_type<4, 4, 4, 4, bg::rgb_layout_t>::type;
  38     using channel_t = bg::channel_type<image_t::view_t::reference>::type;
  39     static_assert(boost::is_integral<channel_t>::value, "");
  40 }
  41
  42 BOOST_AUTO_TEST_SUITE_END()