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- //
- // Copyright 2005-2007 Adobe Systems Incorporated
- // Copyright 2018 Mateusz Loskot <mateusz at loskot dot net>
- //
- // Distributed under the Boost Software License, Version 1.0
- // See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt
- //
- #include <boost/gil/channel_algorithm.hpp>
- #include <type_traits>
- #include <utility>
- #define BOOST_TEST_MODULE test_algorithm_channel_arithmetic
- #include "unit_test.hpp"
- #include "test_fixture.hpp"
- namespace gil = boost::gil;
- namespace fixture = boost::gil::test::fixture;
- template <typename ChannelFixtureBase>
- void test_channel_arithmetic_mutable(std::false_type) {}
- template <typename ChannelFixtureBase>
- void test_channel_arithmetic_mutable(std::true_type)
- {
- using fixture_t = fixture::channel<ChannelFixtureBase>;
- using channel_value_t = typename fixture_t::channel_value_t;
- fixture_t f;
- channel_value_t const v = f.min_v_;
- channel_value_t const one = 1;
- ++f.min_v_;
- f.min_v_++;
- --f.min_v_;
- f.min_v_--;
- BOOST_TEST(v == f.min_v_);
- f.min_v_ += one;
- f.min_v_ -= one;
- BOOST_TEST(v == f.min_v_);
- f.min_v_ *= one;
- f.min_v_ /= one;
- BOOST_TEST(v == f.min_v_);
- f.min_v_ = one; // assignable to scalar
- BOOST_TEST(f.min_v_ == one);
- f.min_v_ = v; // and to value type
- BOOST_TEST(f.min_v_ == v);
- // test swap
- channel_value_t v1 = f.min_v_;
- channel_value_t v2 = f.max_v_;
- std::swap(f.min_v_, f.max_v_);
- BOOST_TEST(f.min_v_ > f.max_v_);
- channel_value_t v3 = f.min_v_;
- channel_value_t v4 = f.max_v_;
- BOOST_TEST(v1 == v4);
- BOOST_TEST(v2 == v3);
- }
- template <typename ChannelFixtureBase>
- void test_channel_arithmetic()
- {
- using fixture_t = fixture::channel<ChannelFixtureBase>;
- fixture_t f;
- BOOST_TEST(f.min_v_ * 1 == f.min_v_);
- BOOST_TEST(f.min_v_ / 1 == f.min_v_);
- BOOST_TEST((f.min_v_ + 1) + 1 == f.min_v_ + 2);
- BOOST_TEST((f.max_v_ - 1) - 1 == f.max_v_ - 2);
- using is_mutable_t = std::integral_constant
- <
- bool,
- gil::channel_traits<typename fixture_t::channel_t>::is_mutable
- >;
- test_channel_arithmetic_mutable<ChannelFixtureBase>(is_mutable_t{});
- }
- BOOST_AUTO_TEST_CASE_TEMPLATE(channel_value, Channel, fixture::channel_byte_types)
- {
- using fixture_t = fixture::channel_value<Channel>;
- test_channel_arithmetic<fixture_t>();
- }
- BOOST_AUTO_TEST_CASE_TEMPLATE(channel_reference, Channel, fixture::channel_byte_types)
- {
- using fixture_t = fixture::channel_reference<Channel&>;
- test_channel_arithmetic<fixture_t>();
- }
- BOOST_AUTO_TEST_CASE_TEMPLATE(
- channel_reference_const, Channel, fixture::channel_byte_types)
- {
- using fixture_t = fixture::channel_reference<Channel const&>;
- test_channel_arithmetic<fixture_t>();
- }
- BOOST_AUTO_TEST_CASE_TEMPLATE(
- packed_channel_reference, BitField, fixture::channel_bitfield_types)
- {
- using channels565_t = fixture::packed_channels565<BitField>;
- test_channel_arithmetic<typename channels565_t::fixture_0_5_t>();
- test_channel_arithmetic<typename channels565_t::fixture_5_6_t >();
- test_channel_arithmetic<typename channels565_t::fixture_11_5_t>();
- }
- BOOST_AUTO_TEST_CASE_TEMPLATE(
- packed_dynamic_channel_reference, BitField, fixture::channel_bitfield_types)
- {
- using channels565_t = fixture::packed_dynamic_channels565<BitField>;
- test_channel_arithmetic<typename channels565_t::fixture_5_t>();
- test_channel_arithmetic<typename channels565_t::fixture_6_t>();
- }
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