Example #1
0
    int operator() (mapnik::marker_svg const& marker)
    {
        using pixfmt = agg::pixfmt_rgba32_pre;
        using renderer_base = agg::renderer_base<pixfmt>;
        using renderer_solid = agg::renderer_scanline_aa_solid<renderer_base>;
        agg::rasterizer_scanline_aa<> ras_ptr;
        agg::scanline_u8 sl;

        double opacity = 1;
        int w = marker.width();
        int h = marker.height();
        if (verbose_)
        {
            std::clog << "found width of '" << w << "' and height of '" << h << "'\n";
        }
        // 10 pixel buffer to avoid edge clipping of 100% svg's
        mapnik::image_rgba8 im(w+0,h+0);
        agg::rendering_buffer buf(im.bytes(), im.width(), im.height(), im.row_size());
        pixfmt pixf(buf);
        renderer_base renb(pixf);

        mapnik::box2d<double> const& bbox = marker.get_data()->bounding_box();
        mapnik::coord<double,2> c = bbox.center();
        // center the svg marker on '0,0'
        agg::trans_affine mtx = agg::trans_affine_translation(-c.x,-c.y);
        // render the marker at the center of the marker box
        mtx.translate(0.5 * im.width(), 0.5 * im.height());

        mapnik::svg::vertex_stl_adapter<mapnik::svg::svg_path_storage> stl_storage(marker.get_data()->source());
        mapnik::svg::svg_path_adapter svg_path(stl_storage);
        mapnik::svg::svg_renderer_agg<mapnik::svg::svg_path_adapter,
            agg::pod_bvector<mapnik::svg::path_attributes>,
            renderer_solid,
            agg::pixfmt_rgba32_pre > svg_renderer_this(svg_path,
                                                       marker.get_data()->attributes());

        svg_renderer_this.render(ras_ptr, sl, renb, mtx, opacity, bbox);

        std::string png_name(svg_name_);
        boost::algorithm::ireplace_last(png_name,".svg",".png");
        demultiply_alpha(im);
        mapnik::save_to_file<mapnik::image_rgba8>(im,png_name,"png");
        int status = 0;
        if (auto_open_)
        {
            std::ostringstream s;
#ifdef DARWIN
            s << "open " << png_name;
#else
            s << "xdg-open " << png_name;
#endif
            int ret = std::system(s.str().c_str());
            if (ret != 0)
                status = ret;
        }
        std::clog << "rendered to: " << png_name << "\n";
        return status;
    }
 std::shared_ptr<cairo_pattern> operator() (mapnik::marker_svg const& marker)
 {
     double opacity = get<value_double, keys::opacity>(sym_, feature_, common_.vars_);
     mapnik::rasterizer ras;
     agg::trans_affine image_tr = agg::trans_affine_scaling(common_.scale_factor_);
     auto image_transform = get_optional<transform_type>(sym_, keys::image_transform);
     if (image_transform) evaluate_transform(image_tr, feature_, common_.vars_, *image_transform);
     mapnik::box2d<double> const& bbox_image = marker.get_data()->bounding_box() * image_tr;
     mapnik::image_rgba8 image(bbox_image.width(), bbox_image.height());
     render_pattern<image_rgba8>(ras, marker, image_tr, 1.0, image);
     width_ = image.width();
     height_ = image.height();
     return std::make_shared<cairo_pattern>(image, opacity);
 }