mirror of
https://github.com/boostorg/gil.git
synced 2026-01-19 04:12:11 +00:00
0b24f4cdbf
* Added all missing examples, dodgy Jamfile still * Fixed attributions and Jamfile indent * One readme per example: synopsis, build and exec reqs * Cleaned up example/convolve2d.cpp * Added example target to root Jamfile Closes #436
43 lines
1.6 KiB
C++
43 lines
1.6 KiB
C++
//
|
|
// 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 <cmath>
|
|
#include <limits>
|
|
#include <vector>
|
|
|
|
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/rasterization/circle.hpp,
|
|
// include/boost/gil/rasterization/ellipse.hpp and include/boost/gil/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 std::ptrdiff_t radius = 64;
|
|
const auto rasterizer = gil::trigonometric_circle_rasterizer{};
|
|
std::vector<gil::point_t> circle_points(rasterizer.point_count(radius));
|
|
rasterizer(radius, {128, 128}, circle_points.begin());
|
|
for (const auto& point : circle_points)
|
|
{
|
|
buffer(point) = std::numeric_limits<gil::uint8_t>::max();
|
|
}
|
|
|
|
gil::write_view("circle.png", buffer, gil::png_tag{});
|
|
}
|