/* M_PI is defined in math.h in the case of Microsoft Visual C++, Solaris,

 * et. al.

 */

#if defined(_MSC_VER)

#define _USE_MATH_DEFINES

#endif 

#include <string>

#include <iostream>

#include <cairommconfig.h>

#include <cairomm/context.h>

#include <cairomm/surface.h>

#include <cmath>

int main()

{

    auto surface =

        Cairo::ImageSurface::create(Cairo::FORMAT_ARGB32, 600, 400);

    auto cr = Cairo::Context::create(surface);

    cr->save(); // save the state of the context

    cr->set_source_rgb(0.86, 0.85, 0.47);

    cr->paint();    // fill image with the color

    cr->restore();  // color is back to black now

    cr->save();

    // draw a border around the image

    cr->set_line_width(20.0);    // make the line wider

    cr->rectangle(0.0, 0.0, surface->get_width(), surface->get_height());

    cr->stroke();

    cr->set_source_rgba(0.0, 0.0, 0.0, 0.7);

    // draw a circle in the center of the image

    cr->arc(surface->get_width() / 2.0, surface->get_height() / 2.0, 

            surface->get_height() / 4.0, 0.0, 2.0 * M_PI);

    cr->stroke();

    // draw a diagonal line

    cr->move_to(surface->get_width() / 4.0, surface->get_height() / 4.0);

    cr->line_to(surface->get_width() * 3.0 / 4.0, surface->get_height() * 3.0 / 4.0);

    cr->stroke();

    cr->restore();

#ifdef CAIRO_HAS_PNG_FUNCTIONS

    std::string filename = "image.png";

    surface->write_to_png(filename);

    std::cout << "Wrote png file \"" << filename << "\"" << std::endl;

#else

    std::cout << "You must compile cairo with PNG support for this example to work."

        << std::endl;

#endif

}