/* Copyright 2005-2007 Adobe Systems Incorporated 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). See http://opensource.adobe.com/gil for most recent version including documentation. */ /*************************************************************************************************/ /// \file /// \brief Test file for convolve_rows() and convolve_cols() in the numeric extension /// \author Lubomir Bourdev and Hailin Jin /// \date February 27, 2007 #include <boost/gil/image.hpp> #include <boost/gil/typedefs.hpp> #include <boost/gil/extension/io/jpeg_io.hpp> using namespace boost::gil; // Models a Unary Function template <typename P> // Models PixelValueConcept struct mandelbrot_fn { typedef point2<ptrdiff_t> point_t; typedef mandelbrot_fn const_t; typedef P value_type; typedef value_type reference; typedef value_type const_reference; typedef point_t argument_type; typedef reference result_type; BOOST_STATIC_CONSTANT(bool, is_mutable=false); value_type _in_color,_out_color; point_t _img_size; static const int MAX_ITER=100; // max number of iterations mandelbrot_fn() {} mandelbrot_fn(const point_t& sz, const value_type& in_color, const value_type& out_color) : _in_color(in_color), _out_color(out_color), _img_size(sz) {} result_type operator()(const point_t& p) const { // normalize the coords to (-2..1, -1.5..1.5) // (actually make y -1.0..2 so it is asymmetric, so we can verify some view factory methods) double t=get_num_iter(point2<double>(p.x/(double)_img_size.x*3-2, p.y/(double)_img_size.y*3-1.0f));//1.5f)); t=pow(t,0.2); value_type ret; for (int k=0; k<num_channels<P>::value; ++k) ret[k]=(typename channel_type<P>::type)(_in_color[k]*t + _out_color[k]*(1-t)); return ret; } private: double get_num_iter(const point2<double>& p) const { point2<double> Z(0,0); for (int i=0; i<MAX_ITER; ++i) { Z = point2<double>(Z.x*Z.x - Z.y*Z.y + p.x, 2*Z.x*Z.y + p.y); if (Z.x*Z.x + Z.y*Z.y > 4) return i/(double)MAX_ITER; } return 0; } }; int main() { typedef mandelbrot_fn<rgb8_pixel_t> deref_t; typedef deref_t::point_t point_t; typedef virtual_2d_locator<deref_t,false> locator_t; typedef image_view<locator_t> my_virt_view_t; boost::function_requires<PixelLocatorConcept<locator_t> >(); gil_function_requires<StepIteratorConcept<locator_t::x_iterator> >(); point_t dims(200,200); my_virt_view_t mandel(dims, locator_t(point_t(0,0), point_t(1,1), deref_t(dims, rgb8_pixel_t(255,0,255), rgb8_pixel_t(0,255,0)))); jpeg_write_view("out-mandelbrot.jpg",mandel); return 0; }