boost/libs/gil/test/extension/numeric/matrix3x2.cpp

//
// Copyright 2019-2020 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.hpp>
#include <boost/gil/extension/numeric/affine.hpp>
#include <boost/gil/extension/numeric/resample.hpp>
#include <boost/gil/extension/numeric/sampler.hpp>

#include <boost/core/lightweight_test.hpp>

#include <cmath>

namespace gil = boost::gil;

// FIXME: Remove when https://github.com/boostorg/core/issues/38 happens
#define BOOST_GIL_TEST_IS_CLOSE(a, b, epsilon) BOOST_TEST_LT(std::fabs((a) - (b)), (epsilon))

namespace {
constexpr double HALF_PI = 1.57079632679489661923;
}

void test_matrix3x2_default_constructor()
{
    gil::matrix3x2<int> m1;
    BOOST_TEST_EQ(m1.a, 1);
    BOOST_TEST_EQ(m1.b, 0);
    BOOST_TEST_EQ(m1.c, 0);
    BOOST_TEST_EQ(m1.d, 1);
    BOOST_TEST_EQ(m1.e, 0);
    BOOST_TEST_EQ(m1.f, 0);
}

void test_matrix3x2_parameterized_constructor()
{
    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
    BOOST_TEST_EQ(m1.a, 1);
    BOOST_TEST_EQ(m1.b, 2);
    BOOST_TEST_EQ(m1.c, 3);
    BOOST_TEST_EQ(m1.d, 4);
    BOOST_TEST_EQ(m1.e, 5);
    BOOST_TEST_EQ(m1.f, 6);
}

void test_matrix3x2_copy_constructor()
{
    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
    gil::matrix3x2<int> m2(m1);
    BOOST_TEST_EQ(m2.a, 1);
    BOOST_TEST_EQ(m2.b, 2);
    BOOST_TEST_EQ(m2.c, 3);
    BOOST_TEST_EQ(m2.d, 4);
    BOOST_TEST_EQ(m2.e, 5);
    BOOST_TEST_EQ(m2.f, 6);
}

void test_matrix3x2_assignment_operator()
{
    gil::matrix3x2<int> m1(1, 2, 3, 4, 5, 6);
    gil::matrix3x2<int> m2;
    m2 = m1;
    BOOST_TEST_EQ(m2.a, 1);
    BOOST_TEST_EQ(m2.b, 2);
    BOOST_TEST_EQ(m2.c, 3);
    BOOST_TEST_EQ(m2.d, 4);
    BOOST_TEST_EQ(m2.e, 5);
    BOOST_TEST_EQ(m2.f, 6);
}

void test_matrix3x2_multiplication_assignment()
{
    gil::matrix3x2<int> m1;
    gil::matrix3x2<int> m2;
    m2 *= m1;
    BOOST_TEST_EQ(m2.a, 1);
    BOOST_TEST_EQ(m2.b, 0);
    BOOST_TEST_EQ(m2.c, 0);
    BOOST_TEST_EQ(m2.d, 1);
    BOOST_TEST_EQ(m2.e, 0);
    BOOST_TEST_EQ(m2.f, 0);

    gil::matrix3x2<int> m3(0, 0, 0, 0, 0, 0);
    m2 *= m3;
    BOOST_TEST_EQ(m2.a, 0);
    BOOST_TEST_EQ(m2.b, 0);
    BOOST_TEST_EQ(m2.c, 0);
    BOOST_TEST_EQ(m2.d, 0);
    BOOST_TEST_EQ(m2.e, 0);
    BOOST_TEST_EQ(m2.f, 0);
}

void test_matrix3x2_matrix3x2_multiplication()
{
    gil::matrix3x2<int> m1;
    gil::matrix3x2<int> m2(0, 0, 0, 0, 0, 0);
    gil::matrix3x2<int> m3;
    m3 = m1 * m2;
    BOOST_TEST_EQ(m3.a, 0);
    BOOST_TEST_EQ(m3.b, 0);
    BOOST_TEST_EQ(m3.c, 0);
    BOOST_TEST_EQ(m3.d, 0);
    BOOST_TEST_EQ(m3.e, 0);
    BOOST_TEST_EQ(m3.f, 0);
}

void test_matrix3x2_vector_multiplication()
{
    gil::matrix3x2<int> m1;
    gil::point<int> v1{2, 4};

    gil::point<int> v2 = v1 * m1;
    BOOST_TEST_EQ(v2.x, 2);
    BOOST_TEST_EQ(v2.y, 4);

    gil::point<int> v3 = gil::transform(m1, v1);
    BOOST_TEST_EQ(v3.x, 2);
    BOOST_TEST_EQ(v3.y, 4);
}

void test_matrix3x2_get_rotate()
{
    auto m1 = gil::matrix3x2<double>::get_rotate(HALF_PI);
    BOOST_GIL_TEST_IS_CLOSE(m1.a, std::cos(HALF_PI), 0.03);
    BOOST_TEST_EQ(m1.b, 1);
    BOOST_TEST_EQ(m1.c, -1);
    BOOST_GIL_TEST_IS_CLOSE(m1.d, std::cos(HALF_PI), 0.03);
    BOOST_TEST_EQ(m1.e, 0);
    BOOST_TEST_EQ(m1.f, 0);
}

void test_matrix3x2_get_scale()
{
    gil::matrix3x2<int> m1;
    m1 = gil::matrix3x2<int>::get_scale(2);
    BOOST_TEST_EQ(m1.a, 2);
    BOOST_TEST_EQ(m1.b, 0);
    BOOST_TEST_EQ(m1.c, 0);
    BOOST_TEST_EQ(m1.d, 2);
    BOOST_TEST_EQ(m1.e, 0);
    BOOST_TEST_EQ(m1.f, 0);
    m1 = gil::matrix3x2<int>::get_scale(2, 4);
    BOOST_TEST_EQ(m1.a, 2);
    BOOST_TEST_EQ(m1.d, 4);
    m1 = gil::matrix3x2<int>::get_scale(gil::point<int>{4, 8});
    BOOST_TEST_EQ(m1.a, 4);
    BOOST_TEST_EQ(m1.d, 8);
}

void test_matrix3x2_get_translate()
{
    gil::matrix3x2<int> m1;
    m1 = gil::matrix3x2<int>::get_translate(2, 4);
    BOOST_TEST_EQ(m1.a, 1);
    BOOST_TEST_EQ(m1.b, 0);
    BOOST_TEST_EQ(m1.c, 0);
    BOOST_TEST_EQ(m1.d, 1);
    BOOST_TEST_EQ(m1.e, 2);
    BOOST_TEST_EQ(m1.f, 4);
    m1 = gil::matrix3x2<int>::get_translate(gil::point<int>{4, 8});
    BOOST_TEST_EQ(m1.e, 4);
    BOOST_TEST_EQ(m1.f, 8);
}

void test_matrix3x2_transform()
{
    gil::matrix3x2<int> m1;
    gil::point<int> v1{2, 4};
    gil::point<int> v2 = gil::transform(m1, v1);
    BOOST_TEST_EQ(v2.x, 2);
    BOOST_TEST_EQ(v2.y, 4);
}

int main()
{
    test_matrix3x2_default_constructor();
    test_matrix3x2_parameterized_constructor();
    test_matrix3x2_copy_constructor();
    test_matrix3x2_assignment_operator();
    test_matrix3x2_multiplication_assignment();
    test_matrix3x2_matrix3x2_multiplication();
    test_matrix3x2_vector_multiplication();
    test_matrix3x2_get_rotate();
    test_matrix3x2_get_scale();
    test_matrix3x2_get_translate();
    test_matrix3x2_transform();

    return ::boost::report_errors();
}