// Boost.GIL (Generic Image Library) - tests
//
// Copyright 2020 Olzhas Zhumabek <anonymous.from.applecity@gmail.com>
//
// Use, modification and distribution are subject to 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/io/png.hpp>

#include <limits>
#include <vector>

namespace gil = boost::gil;

const std::ptrdiff_t size = 256;

void line_bresenham(std::ptrdiff_t width, std::ptrdiff_t height, const std::string& output_name)
{
    const auto rasterizer = gil::bresenham_line_rasterizer{};
    std::vector<gil::point_t> line_points(rasterizer.point_count(width, height));

    gil::gray8_image_t image(size, size);
    auto view = gil::view(image);

    rasterizer({0, 0}, {width - 1, height - 1}, line_points.begin());
    for (const auto& point : line_points)
    {
        view(point) = std::numeric_limits<gil::uint8_t>::max();
    }

    gil::write_view(output_name, view, gil::png_tag{});
}

int main()
{
    line_bresenham(256, 256, "line-bresenham-256-256.png");
    line_bresenham(256, 128, "line-bresenham-256-128.png");
    line_bresenham(256, 1, "line-bresenham-256-1.png");
    line_bresenham(1, 256, "line-bresenham-1-256.png");
}