//

// Copyright 2020 Olzhas Zhumabek <[email protected]>

//

// 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 <boost/gil/extension/rasterization/circle.hpp>

namespace gil = boost::gil;

// Demonstrates the use of a rasterizer to generate an image of a circle

// The various rasterizers available are defined in include/boost/gil/extension/rasterization/circle.hpp,

// include/boost/gil/extension/rasterization/ellipse.hpp and include/boost/gil/extension/rasterization/line.hpp

// This example uses a trigonometric rasterizer; GIL also offers the rasterizer midpoint_circle_rasterizer,

// which implements the Midpoint algorithm.

// See also:

// rasterizer_ellipse.cpp - Demonstrates the use of a rasterizer to generate an image of an ellipse

// rasterizer_line.cpp - Demonstrates the use of a rasterizer to generate an image of a line

int main()

{

const std::ptrdiff_t size = 256;

gil::gray8_image_t buffer_image(size, size);

auto buffer = gil::view(buffer_image);

const gil::point_t center = {128, 128};

const std::ptrdiff_t radius = 64;

const auto rasterizer = gil::trigonometric_circle_rasterizer{center, radius};

gil::apply_rasterizer(buffer, rasterizer, gil::gray8_pixel_t{255});

gil::write_view("circle.png", buffer, gil::png_tag{});

}