void grid_renderer<T>::process(polygon_pattern_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);

    boost::optional<marker_ptr> mark = marker_cache::instance().find(filename,true);
    if (!mark) return;

    if (!(*mark)->is_bitmap())
    {
        MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
        return;
    }

    boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
    if (!pat) return;

    ras_ptr->reset();

    agg::trans_affine tr;
    evaluate_transform(tr, feature, sym.get_transform());

    typedef boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,smooth_tag> conv_types;
    vertex_converter<box2d<double>, grid_rasterizer, polygon_pattern_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
        converter(query_extent_,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);

    if (prj_trans.equal() && sym.clip()) converter.set<clip_poly_tag>(); //optional clip (default: true)
    converter.set<transform_tag>(); //always transform
    converter.set<affine_transform_tag>();
    if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter


    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 2)
        {
            converter.apply(geom);
        }
    }
    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    // render id
    ren.color(color_type(feature.id()));
    agg::scanline_bin sl;
    ras_ptr->filling_rule(agg::fill_even_odd);
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);
}
예제 #2
0
void agg_renderer<T0,T1>::process(dot_symbolizer const& sym,
                                  mapnik::feature_impl & feature,
                                  proj_transform const& prj_trans)
{
    double width = 0.0;
    double height = 0.0;
    bool has_width = has_key(sym,keys::width);
    bool has_height = has_key(sym,keys::height);
    if (has_width && has_height)
    {
        width = get<double>(sym, keys::width, feature, common_.vars_, 0.0);
        height = get<double>(sym, keys::height, feature, common_.vars_, 0.0);
    }
    else if (has_width)
    {
        width = height = get<double>(sym, keys::width, feature, common_.vars_, 0.0);
    }
    else if (has_height)
    {
        width = height = get<double>(sym, keys::height, feature, common_.vars_, 0.0);
    }
    double rx = width/2.0;
    double ry = height/2.0;
    double opacity = get<double>(sym, keys::opacity, feature, common_.vars_, 1.0);
    color const& fill = get<mapnik::color>(sym, keys::fill, feature, common_.vars_, mapnik::color(128,128,128));
    ras_ptr->reset();
    agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(),current_buffer_->width() * 4);
    using blender_type = agg::comp_op_adaptor_rgba_pre<agg::rgba8, agg::order_rgba>;
    using pixfmt_comp_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
    using renderer_base = agg::renderer_base<pixfmt_comp_type>;
    using renderer_type = agg::renderer_scanline_aa_solid<renderer_base>;
    pixfmt_comp_type pixf(buf);
    pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over)));
    renderer_base renb(pixf);
    renderer_type ren(renb);
    agg::scanline_u8 sl;
    ren.color(agg::rgba8_pre(fill.red(), fill.green(), fill.blue(), int(fill.alpha() * opacity)));
    agg::ellipse el(0,0,rx,ry);
    unsigned num_steps = el.num_steps();
    for (geometry_type const& geom : feature.paths()) {
        double x,y,z = 0;
        unsigned cmd = 1;
        geom.rewind(0);
        while ((cmd = geom.vertex(&x, &y)) != mapnik::SEG_END) {
            if (cmd == SEG_CLOSE) continue;
            prj_trans.backward(x,y,z);
            common_.t_.forward(&x,&y);
            el.init(x,y,rx,ry,num_steps);
            ras_ptr->add_path(el);
            agg::render_scanlines(*ras_ptr, sl, ren);
        }
    }
}
void grid_renderer<T>::process(polygon_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;

    ras_ptr->reset();

    agg::trans_affine tr;
    evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);

    typedef boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag> conv_types;
    vertex_converter<box2d<double>, grid_rasterizer, polygon_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
        converter(query_extent_,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);

    if (prj_trans.equal() && sym.clip()) converter.set<clip_poly_tag>(); //optional clip (default: true)
    converter.set<transform_tag>(); //always transform
    converter.set<affine_transform_tag>();
    if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter


    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 2)
        {
            converter.apply(geom);
        }
    }

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    // render id
    ren.color(color_type(feature.id()));
    agg::scanline_bin sl;
    ras_ptr->filling_rule(agg::fill_even_odd);
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);
}
void cairo_renderer<T>::process(debug_symbolizer const& sym,
                                  mapnik::feature_impl & feature,
                                  proj_transform const& prj_trans)
{
    using detector_type = label_collision_detector4;
    cairo_save_restore guard(context_);

    debug_symbolizer_mode_enum mode = get<debug_symbolizer_mode_enum>(sym, keys::mode, feature, common_.vars_, DEBUG_SYM_MODE_COLLISION);

    context_.set_operator(src_over);
    context_.set_color(mapnik::color(255, 0, 0), 1.0);
    context_.set_line_join(MITER_JOIN);
    context_.set_line_cap(BUTT_CAP);
    context_.set_miter_limit(4.0);
    context_.set_line_width(1.0);

    if (mode == DEBUG_SYM_MODE_COLLISION)
    {
        typename detector_type::query_iterator itr = common_.detector_->begin();
        typename detector_type::query_iterator end = common_.detector_->end();
        for ( ;itr!=end; ++itr)
        {
            render_debug_box(context_, itr->box);
        }
    }
    else if (mode == DEBUG_SYM_MODE_VERTEX)
    {
        for (auto const& geom : feature.paths())
        {
            double x;
            double y;
            double z = 0;
            geom.rewind(0);
            unsigned cmd = 1;
            while ((cmd = geom.vertex(&x, &y)) != mapnik::SEG_END)
            {
                if (cmd == SEG_CLOSE) continue;
                prj_trans.backward(x,y,z);
                common_.t_.forward(&x,&y);
                context_.move_to(std::floor(x) - 0.5, std::floor(y) + 0.5);
                context_.line_to(std::floor(x) + 1.5, std::floor(y) + 0.5);
                context_.move_to(std::floor(x) + 0.5, std::floor(y) - 0.5);
                context_.line_to(std::floor(x) + 0.5, std::floor(y) + 1.5);
                context_.stroke();
            }
        }
    }
}
예제 #5
0
bool svg_renderer<OutputIterator>::process(rule::symbolizers const& syms,
                                           mapnik::feature_impl & feature,
                                           proj_transform const& prj_trans)
{
    // svg renderer supports processing of multiple symbolizers.
    typedef coord_transform<CoordTransform, geometry_type> path_type;

    bool process_path = false;
    // process each symbolizer to collect its (path) information.
    // path information (attributes from line_ and polygon_ symbolizers)
    // is collected with the path_attributes_ data member.
    for (auto const& sym : syms)
    {
        if (is_path_based(sym))
        {
            process_path = true;
        }
        boost::apply_visitor(symbol_dispatch(*this, feature, prj_trans), sym);
    }

    if (process_path)
    {
        // generate path output for each geometry of the current feature.
        for (auto & geom : feature.paths())
        {
            if(geom.size() > 0)
            {
                path_type path(common_.t_, geom, prj_trans);
                generator_.generate_path(path, path_attributes_);
            }
        }
        // set the previously collected values back to their defaults
        // for the feature that will be processed next.
        path_attributes_.reset();
    }
    return true;
}
void cairo_renderer<T>::process(polygon_pattern_symbolizer const& sym,
                                mapnik::feature_impl & feature,
                                proj_transform const& prj_trans)
{
    composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_);
    std::string filename = get<std::string, keys::file>(sym, feature, common_.vars_);
    value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
    value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
    value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
    value_double opacity = get<value_double, keys::opacity>(sym, feature, common_.vars_);
    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);

    cairo_save_restore guard(context_);
    context_.set_operator(comp_op);

    boost::optional<mapnik::marker_ptr> marker = mapnik::marker_cache::instance().find(filename,true);
    if (!marker || !(*marker)) return;

    unsigned offset_x=0;
    unsigned offset_y=0;
    box2d<double> const& clip_box = clipping_extent(common_);
    pattern_alignment_enum alignment = get<pattern_alignment_enum, keys::alignment>(sym, feature, common_.vars_);
    if (alignment == LOCAL_ALIGNMENT)
    {
        double x0 = 0.0;
        double y0 = 0.0;

        if (feature.num_geometries() > 0)
        {
            using clipped_geometry_type = agg::conv_clip_polygon<geometry_type>;
            using path_type = transform_path_adapter<view_transform,clipped_geometry_type>;
            clipped_geometry_type clipped(feature.get_geometry(0));
            clipped.clip_box(clip_box.minx(), clip_box.miny(),
                             clip_box.maxx(), clip_box.maxy());
            path_type path(common_.t_, clipped, prj_trans);
            path.vertex(&x0, &y0);
        }
        offset_x = std::abs(clip_box.width() - x0);
        offset_y = std::abs(clip_box.height() - y0);
    }

    if ((*marker)->is_bitmap())
    {
        cairo_pattern pattern(**((*marker)->get_bitmap_data()), opacity);
        pattern.set_extend(CAIRO_EXTEND_REPEAT);
        pattern.set_origin(offset_x, offset_y);
        context_.set_pattern(pattern);
    }
    else
    {
        mapnik::rasterizer ras;
        image_ptr image = render_pattern(ras, **marker, image_tr, 1.0); //
        cairo_pattern pattern(*image, opacity);
        pattern.set_extend(CAIRO_EXTEND_REPEAT);
        pattern.set_origin(offset_x, offset_y);
        context_.set_pattern(pattern);
    }

    agg::trans_affine tr;
    auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (geom_transform) {
        evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_);
    }

    vertex_converter<cairo_context,clip_poly_tag,transform_tag,affine_transform_tag,simplify_tag,smooth_tag>
    converter(clip_box, context_,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);

    if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
    converter.set<transform_tag>(); //always transform
    converter.set<affine_transform_tag>();
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 2)
        {
            converter.apply(geom);
        }
    }
    // fill polygon
    context_.set_fill_rule(CAIRO_FILL_RULE_EVEN_ODD);
    context_.fill();
}
예제 #7
0
void cairo_renderer<T>::process(line_symbolizer const& sym,
                                  mapnik::feature_impl & feature,
                                  proj_transform const& prj_trans)
{
    composite_mode_e comp_op = get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_);
    value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
    value_double offset = get<value_double, keys::offset>(sym, feature, common_.vars_);
    value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
    value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);

    color stroke = get<color, keys::stroke>(sym, feature, common_.vars_);
    value_double stroke_opacity = get<value_double, keys::stroke_opacity>(sym, feature, common_.vars_);
    line_join_enum stroke_join = get<line_join_enum, keys::stroke_linejoin>(sym, feature, common_.vars_);
    line_cap_enum stroke_cap = get<line_cap_enum, keys::stroke_linecap>(sym, feature, common_.vars_);
    value_double miterlimit = get<value_double, keys::stroke_miterlimit>(sym, feature, common_.vars_);
    value_double width = get<value_double, keys::stroke_width>(sym, feature, common_.vars_);

    auto dash = get_optional<dash_array>(sym, keys::stroke_dasharray, feature, common_.vars_);

    cairo_save_restore guard(context_);
    context_.set_operator(comp_op);
    context_.set_color(stroke, stroke_opacity);
    context_.set_line_join(stroke_join);
    context_.set_line_cap(stroke_cap);
    context_.set_miter_limit(miterlimit);
    context_.set_line_width(width * common_.scale_factor_);
    if (dash)
    {
        context_.set_dash(*dash, common_.scale_factor_);
    }

    agg::trans_affine tr;
    auto geom_transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (geom_transform) { evaluate_transform(tr, feature, common_.vars_, *geom_transform, common_.scale_factor_); }

    box2d<double> clipping_extent = common_.query_extent_;
    if (clip)
    {
        double padding = (double)(common_.query_extent_.width()/common_.width_);
        double half_stroke = width/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(offset) > 0)
            padding *= std::fabs(offset) * 1.2;
        padding *= common_.scale_factor_;
        clipping_extent.pad(padding);
    }
    vertex_converter<cairo_context,
                     clip_line_tag,
                     transform_tag,
                     affine_transform_tag,
                     simplify_tag, smooth_tag,
                     offset_transform_tag,
                     dash_tag, stroke_tag>
        converter(clipping_extent,context_,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);

    if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
    converter.set<transform_tag>(); // always transform
    if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

    for (geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }
    // stroke
    context_.set_fill_rule(CAIRO_FILL_RULE_WINDING);
    context_.stroke();
}
void grid_renderer<T>::process(line_pattern_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
    if (filename.empty()) return;
    boost::optional<mapnik::marker_ptr> mark = marker_cache::instance().find(filename, true);
    if (!mark) return;

    if (!(*mark)->is_bitmap())
    {
        MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
        return;
    }

    boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
    if (!pat) return;

    bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, true);
    double offset = get<value_double>(sym, keys::offset, feature, common_.vars_, 0.0);
    double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
    double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);

    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
    typedef boost::mpl::vector<clip_line_tag, transform_tag,
                               offset_transform_tag, affine_transform_tag,
                               simplify_tag, smooth_tag, stroke_tag> conv_types;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), common_.width_, common_.height_, common_.width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    ras_ptr->reset();

    int stroke_width = (*pat)->width();

    agg::trans_affine tr;
    auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (transform)
    {
        evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
    }

    box2d<double> clipping_extent = common_.query_extent_;
    if (clip)
    {
        double padding = (double)(common_.query_extent_.width()/pixmap_.width());
        double half_stroke = stroke_width/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(offset) > 0)
            padding *= std::fabs(offset) * 1.2;
        padding *= common_.scale_factor_;
        clipping_extent.pad(padding);
    }
    
    // to avoid the complexity of using an agg pattern filter instead
    // we create a line_symbolizer in order to fake the pattern
    line_symbolizer line;
    put<value_double>(line, keys::stroke_width, value_double(stroke_width));
    // TODO: really should pass the offset to the fake line too, but
    // this wasn't present in the previous version and makes the test
    // fail - in this case, probably the test should be updated.
    //put<value_double>(line, keys::offset, value_double(offset));
    put<value_double>(line, keys::simplify_tolerance, value_double(simplify_tolerance));
    put<value_double>(line, keys::smooth, value_double(smooth));

    vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
        converter(clipping_extent,*ras_ptr,line,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
    if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
    converter.set<transform_tag>(); // always transform
    if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
    converter.set<stroke_tag>(); //always stroke

    for (geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }

    // render id
    ren.color(color_type(feature.id()));
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);

}
예제 #9
0
void agg_renderer<T0,T1>::process(line_symbolizer const& sym,
                              mapnik::feature_impl & feature,
                              proj_transform const& prj_trans)

{
    color const& col = get<color, keys::stroke>(sym, feature, common_.vars_);
    unsigned r=col.red();
    unsigned g=col.green();
    unsigned b=col.blue();
    unsigned a=col.alpha();

    double gamma = get<value_double, keys::stroke_gamma>(sym, feature, common_.vars_);
    gamma_method_enum gamma_method = get<gamma_method_enum, keys::stroke_gamma_method>(sym, feature, common_.vars_);
    ras_ptr->reset();

    if (gamma != gamma_ || gamma_method != gamma_method_)
    {
        set_gamma_method(ras_ptr, gamma, gamma_method);
        gamma_method_ = gamma_method;
        gamma_ = gamma;
    }

    agg::rendering_buffer buf(current_buffer_->getBytes(),current_buffer_->width(),current_buffer_->height(), current_buffer_->getRowSize());

    using color_type = agg::rgba8;
    using order_type = agg::order_rgba;
    using blender_type = agg::comp_op_adaptor_rgba_pre<color_type, order_type>; // comp blender
    using pixfmt_comp_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
    using renderer_base = agg::renderer_base<pixfmt_comp_type>;

    pixfmt_comp_type pixf(buf);
    pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e, keys::comp_op>(sym, feature, common_.vars_)));
    renderer_base renb(pixf);

    agg::trans_affine tr;
    auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);

    box2d<double> clip_box = clipping_extent(common_);

    value_bool clip = get<value_bool, keys::clip>(sym, feature, common_.vars_);
    value_double width = get<value_double, keys::stroke_width>(sym, feature, common_.vars_);
    value_double opacity = get<value_double,keys::stroke_opacity>(sym,feature, common_.vars_);
    value_double offset = get<value_double, keys::offset>(sym, feature, common_.vars_);
    value_double simplify_tolerance = get<value_double, keys::simplify_tolerance>(sym, feature, common_.vars_);
    value_double smooth = get<value_double, keys::smooth>(sym, feature, common_.vars_);
    line_rasterizer_enum rasterizer_e = get<line_rasterizer_enum, keys::line_rasterizer>(sym, feature, common_.vars_);
    if (clip)
    {
        double padding = static_cast<double>(common_.query_extent_.width()/pixmap_.width());
        double half_stroke = 0.5 * width;
        if (half_stroke > 1)
        {
            padding *= half_stroke;
        }
        if (std::fabs(offset) > 0)
        {
            padding *= std::fabs(offset) * 1.2;
        }

        padding *= common_.scale_factor_;
        clip_box.pad(padding);
        // debugging
        //box2d<double> inverse = query_extent_;
        //inverse.pad(-padding);
        //draw_geo_extent(inverse,mapnik::color("red"));
    }

    if (rasterizer_e == RASTERIZER_FAST)
    {
        using renderer_type = agg::renderer_outline_aa<renderer_base>;
        using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;
        agg::line_profile_aa profile(width * common_.scale_factor_, agg::gamma_power(gamma));
        renderer_type ren(renb, profile);
        ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
        rasterizer_type ras(ren);
        set_join_caps_aa(sym, ras, feature, common_.vars_);

        vertex_converter<rasterizer_type,clip_line_tag, transform_tag,
                         affine_transform_tag,
                         simplify_tag, smooth_tag,
                         offset_transform_tag,
                         dash_tag, stroke_tag>
            converter(clip_box,ras,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
        if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
        converter.set<transform_tag>(); // always transform
        if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
        converter.set<affine_transform_tag>(); // optional affine transform
        if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
        if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

        for (geometry_type const& geom : feature.paths())
        {
            if (geom.size() > 1)
            {
                vertex_adapter va(geom);
                converter.apply(va);
            }
        }
    }
    else
    {
        vertex_converter<rasterizer,clip_line_tag, transform_tag,
                         affine_transform_tag,
                         simplify_tag, smooth_tag,
                         offset_transform_tag,
                         dash_tag, stroke_tag>
            converter(clip_box,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);

        if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
        converter.set<transform_tag>(); // always transform
        if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
        converter.set<affine_transform_tag>(); // optional affine transform
        if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
        if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
        if (has_key(sym, keys::stroke_dasharray))
            converter.set<dash_tag>();
        converter.set<stroke_tag>(); //always stroke

        for (geometry_type const& geom : feature.paths())
        {
            if (geom.size() > 1)
            {
                vertex_adapter va(geom);
                converter.apply(va);
            }
        }

        using renderer_type = agg::renderer_scanline_aa_solid<renderer_base>;
        renderer_type ren(renb);
        ren.color(agg::rgba8_pre(r, g, b, int(a * opacity)));
        agg::scanline_u8 sl;
        ras_ptr->filling_rule(agg::fill_non_zero);
        agg::render_scanlines(*ras_ptr, sl, ren);
    }
}
예제 #10
0
void render_markers_symbolizer(markers_symbolizer const &sym,
                               mapnik::feature_impl &feature,
                               proj_transform const &prj_trans,
                               renderer_common &common,
                               box2d<double> const &clip_box,
                               F1 make_vector_dispatch,
                               F2 make_raster_dispatch)
{
    using namespace mapnik::svg;
    typedef boost::mpl::vector<clip_poly_tag,transform_tag,smooth_tag> conv_types;
    typedef agg::pod_bvector<path_attributes> svg_attribute_type;

    std::string filename = get<std::string>(sym, keys::file, feature, common.vars_, "shape://ellipse");
    bool clip = get<value_bool>(sym, keys::clip, feature, common.vars_, false);
    double smooth = get<value_double>(sym, keys::smooth, feature, common.vars_, false);

    // https://github.com/mapnik/mapnik/issues/1316
    bool snap_pixels = !mapnik::marker_cache::instance().is_uri(filename);
    if (!filename.empty())
    {
        boost::optional<marker_ptr> mark = mapnik::marker_cache::instance().find(filename, true);
        if (mark && *mark)
        {
            agg::trans_affine tr = agg::trans_affine_scaling(common.scale_factor_);

            if ((*mark)->is_vector())
            {
                boost::optional<svg_path_ptr> const& stock_vector_marker = (*mark)->get_vector_data();

                auto width_expr = get_optional<expression_ptr>(sym, keys::width);
                auto height_expr = get_optional<expression_ptr>(sym, keys::height);

                // special case for simple ellipse markers
                // to allow for full control over rx/ry dimensions
                if (filename == "shape://ellipse"
                   && (width_expr || height_expr))
                {
                    svg_storage_type marker_ellipse;
                    vertex_stl_adapter<svg_path_storage> stl_storage(marker_ellipse.source());
                    svg_path_adapter svg_path(stl_storage);
                    build_ellipse(sym, feature, common.vars_, marker_ellipse, svg_path);
                    svg_attribute_type attributes;
                    bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym, feature, common.vars_);
                    auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
                    if (image_transform) evaluate_transform(tr, feature, common.vars_, *image_transform);
                    box2d<double> bbox = marker_ellipse.bounding_box();

                    auto rasterizer_dispatch = make_vector_dispatch(
                      svg_path, result ? attributes : (*stock_vector_marker)->attributes(), 
                      marker_ellipse, bbox, tr, snap_pixels);
                    typedef decltype(rasterizer_dispatch) dispatch_type;

                    vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                     CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
                        converter(clip_box, rasterizer_dispatch, sym,common.t_,prj_trans,tr,feature,common.vars_,common.scale_factor_);
                    if (clip && feature.paths().size() > 0) // optional clip (default: true)
                    {
                        geometry_type::types type = feature.paths()[0].type();
                        if (type == geometry_type::types::Polygon)
                            converter.template set<clip_poly_tag>();
                        // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                        //else if (type == LineString)
                        //    converter.template set<clip_line_tag>();
                        // don't clip if type==Point
                    }
                    converter.template set<transform_tag>(); //always transform
                    if (smooth > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                    apply_markers_multi(feature, common.vars_, converter, sym);
                }
                else
                {
                    box2d<double> const& bbox = (*mark)->bounding_box();
                    setup_transform_scaling(tr, bbox.width(), bbox.height(), feature, common.vars_, sym);
                    auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
                    if (image_transform) evaluate_transform(tr, feature, common.vars_, *image_transform);
                    vertex_stl_adapter<svg_path_storage> stl_storage((*stock_vector_marker)->source());
                    svg_path_adapter svg_path(stl_storage);
                    svg_attribute_type attributes;
                    bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym, feature, common.vars_);
                    auto rasterizer_dispatch = make_vector_dispatch(
                      svg_path, result ? attributes : (*stock_vector_marker)->attributes(),
                      **stock_vector_marker, bbox, tr, snap_pixels);
                    typedef decltype(rasterizer_dispatch) dispatch_type;

                    vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                     CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
                        converter(clip_box, rasterizer_dispatch, sym,common.t_,prj_trans,tr,feature,common.vars_,common.scale_factor_);
                    if (clip && feature.paths().size() > 0) // optional clip (default: true)
                    {
                        geometry_type::types type = feature.paths()[0].type();
                        if (type == geometry_type::types::Polygon)
                            converter.template set<clip_poly_tag>();
                        // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                        //else if (type == LineString)
                        //    converter.template set<clip_line_tag>();
                        // don't clip if type==Point
                    }
                    converter.template set<transform_tag>(); //always transform
                    if (smooth > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                    apply_markers_multi(feature, common.vars_, converter, sym);
                }
            }
            else // raster markers
            {
                setup_transform_scaling(tr, (*mark)->width(), (*mark)->height(), feature, common.vars_, sym);
                auto image_transform = get_optional<transform_type>(sym, keys::image_transform);
                if (image_transform) evaluate_transform(tr, feature, common.vars_, *image_transform);
                box2d<double> const& bbox = (*mark)->bounding_box();
                boost::optional<mapnik::image_ptr> marker = (*mark)->get_bitmap_data();
                
                auto rasterizer_dispatch = make_raster_dispatch(**marker, tr, bbox);
                typedef decltype(rasterizer_dispatch) dispatch_type;

                vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                 CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
                    converter(clip_box, rasterizer_dispatch, sym,common.t_,prj_trans,tr,feature,common.vars_,common.scale_factor_);

                if (clip && feature.paths().size() > 0) // optional clip (default: true)
                {
                    geometry_type::types type = feature.paths()[0].type();
                    if (type == geometry_type::types::Polygon)
                        converter.template set<clip_poly_tag>();
                    // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                    //else if (type == geometry_type::types::LineString)
                    //    converter.template set<clip_line_tag>();
                    // don't clip if type==geometry_type::types::Point
                }
                converter.template set<transform_tag>(); //always transform
                if (smooth > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                apply_markers_multi(feature, common.vars_, converter, sym);
            }
        }
    }
}
void grid_renderer<T>::process(polygon_pattern_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
    if (filename.empty()) return;
    boost::optional<mapnik::marker_ptr> mark = marker_cache::instance().find(filename, true);
    if (!mark) return;

    if (!(*mark)->is_bitmap())
    {
        MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
        return;
    }

    boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
    if (!pat) return;

    ras_ptr->reset();

    bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, true);
    double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
    double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);

    agg::trans_affine tr;
    auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (transform)
    {
        evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
    }

    using conv_types = boost::mpl::vector<clip_poly_tag,transform_tag,affine_transform_tag,smooth_tag>;
    vertex_converter<box2d<double>, grid_rasterizer, polygon_pattern_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
        converter(common_.query_extent_,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);

    if (prj_trans.equal() && clip) converter.set<clip_poly_tag>(); //optional clip (default: true)
    converter.set<transform_tag>(); //always transform
    converter.set<affine_transform_tag>();
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 2)
        {
            converter.apply(geom);
        }
    }
    using pixfmt_type = typename grid_renderer_base_type::pixfmt_type;
    using color_type = typename grid_renderer_base_type::pixfmt_type::color_type;
    using renderer_type = agg::renderer_scanline_bin_solid<grid_renderer_base_type>;

    grid_rendering_buffer buf(pixmap_.raw_data(), common_.width_, common_.height_, common_.width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    // render id
    ren.color(color_type(feature.id()));
    agg::scanline_bin sl;
    ras_ptr->filling_rule(agg::fill_even_odd);
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);
}
예제 #12
0
void agg_renderer<T>::process(line_symbolizer const& sym,
                              mapnik::feature_impl & feature,
                              proj_transform const& prj_trans)

{
    stroke const& stroke_ = sym.get_stroke();
    color const& col = stroke_.get_color();
    unsigned r=col.red();
    unsigned g=col.green();
    unsigned b=col.blue();
    unsigned a=col.alpha();

    ras_ptr->reset();
    if (stroke_.get_gamma() != gamma_ || stroke_.get_gamma_method() != gamma_method_)
    {
        set_gamma_method(stroke_, ras_ptr);
        gamma_method_ = stroke_.get_gamma_method();
        gamma_ = stroke_.get_gamma();
    }

    agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);

    typedef agg::rgba8 color_type;
    typedef agg::order_rgba order_type;
    typedef agg::comp_op_adaptor_rgba_pre<color_type, order_type> blender_type; // comp blender
    typedef agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer> pixfmt_comp_type;
    typedef agg::renderer_base<pixfmt_comp_type> renderer_base;
    typedef boost::mpl::vector<clip_line_tag, transform_tag,
            offset_transform_tag, affine_transform_tag,
            simplify_tag, smooth_tag, dash_tag, stroke_tag> conv_types;

    pixfmt_comp_type pixf(buf);
    pixf.comp_op(static_cast<agg::comp_op_e>(sym.comp_op()));
    renderer_base renb(pixf);

    agg::trans_affine tr;
    evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);

    box2d<double> clip_box = clipping_extent();
    if (sym.clip())
    {
        double padding = (double)(query_extent_.width()/pixmap_.width());
        double half_stroke = stroke_.get_width()/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(sym.offset()) > 0)
            padding *= std::fabs(sym.offset()) * 1.2;
        padding *= scale_factor_;
        clip_box.pad(padding);
        // debugging
        //box2d<double> inverse = query_extent_;
        //inverse.pad(-padding);
        //draw_geo_extent(inverse,mapnik::color("red"));
    }

    if (sym.get_rasterizer() == RASTERIZER_FAST)
    {
        typedef agg::renderer_outline_aa<renderer_base> renderer_type;
        typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;
        agg::line_profile_aa profile(stroke_.get_width() * scale_factor_, agg::gamma_power(stroke_.get_gamma()));
        renderer_type ren(renb, profile);
        ren.color(agg::rgba8_pre(r, g, b, int(a*stroke_.get_opacity())));
        rasterizer_type ras(ren);
        set_join_caps_aa(stroke_,ras);

        vertex_converter<box2d<double>, rasterizer_type, line_symbolizer,
                         CoordTransform, proj_transform, agg::trans_affine, conv_types>
                         converter(clip_box,ras,sym,t_,prj_trans,tr,scale_factor_);
        if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
        converter.set<transform_tag>(); // always transform
        if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
        converter.set<affine_transform_tag>(); // optional affine transform
        if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
        if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter

        for (geometry_type & geom : feature.paths())
        {
            if (geom.size() > 1)
            {
                converter.apply(geom);
            }
        }
    }
    else
    {
        vertex_converter<box2d<double>, rasterizer, line_symbolizer,
                         CoordTransform, proj_transform, agg::trans_affine, conv_types>
                         converter(clip_box,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);

        if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
        converter.set<transform_tag>(); // always transform
        if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
        converter.set<affine_transform_tag>(); // optional affine transform
        if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
        if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
        if (stroke_.has_dash()) converter.set<dash_tag>();
        converter.set<stroke_tag>(); //always stroke

        for (geometry_type & geom : feature.paths())
        {
            if (geom.size() > 1)
            {
                converter.apply(geom);
            }
        }

        typedef agg::renderer_scanline_aa_solid<renderer_base> renderer_type;
        renderer_type ren(renb);
        ren.color(agg::rgba8_pre(r, g, b, int(a * stroke_.get_opacity())));
        agg::scanline_u8 sl;
        ras_ptr->filling_rule(agg::fill_non_zero);
        agg::render_scanlines(*ras_ptr, sl, ren);
    }
}
void grid_renderer<T>::process(line_pattern_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    std::string filename = path_processor_type::evaluate( *sym.get_filename(), feature);

    boost::optional<marker_ptr> mark = marker_cache::instance().find(filename,true);
    if (!mark) return;

    if (!(*mark)->is_bitmap())
    {
        MAPNIK_LOG_DEBUG(agg_renderer) << "agg_renderer: Only images (not '" << filename << "') are supported in the line_pattern_symbolizer";
        return;
    }

    boost::optional<image_ptr> pat = (*mark)->get_bitmap_data();
    if (!pat) return;

    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
    typedef boost::mpl::vector<clip_line_tag, transform_tag,
                               offset_transform_tag, affine_transform_tag,
                               simplify_tag, smooth_tag, stroke_tag> conv_types;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    ras_ptr->reset();

    int stroke_width = (*pat)->width();

    agg::trans_affine tr;
    evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);

    box2d<double> clipping_extent = query_extent_;
    if (sym.clip())
    {
        double padding = (double)(query_extent_.width()/pixmap_.width());
        double half_stroke = stroke_width/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(sym.offset()) > 0)
            padding *= std::fabs(sym.offset()) * 1.2;
        padding *= scale_factor_;
        clipping_extent.pad(padding);
    }
    
    // to avoid the complexity of using an agg pattern filter instead
    // we create a line_symbolizer in order to fake the pattern
    stroke str;
    str.set_width(stroke_width);
    line_symbolizer line(str);
    vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
        converter(clipping_extent,*ras_ptr,line,t_,prj_trans,tr,scale_factor_);
    if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
    converter.set<transform_tag>(); // always transform
    if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
    converter.set<stroke_tag>(); //always stroke

    for (geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }

    // render id
    ren.color(color_type(feature.id()));
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);

}
void grid_renderer<T>::process(line_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
    typedef boost::mpl::vector<clip_line_tag, transform_tag,
                               offset_transform_tag, affine_transform_tag,
                               simplify_tag, smooth_tag, dash_tag, stroke_tag> conv_types;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    ras_ptr->reset();

    stroke const& stroke_ = sym.get_stroke();

    agg::trans_affine tr;
    evaluate_transform(tr, feature, sym.get_transform(), scale_factor_);

    box2d<double> clipping_extent = query_extent_;
    if (sym.clip())
    {
        double padding = (double)(query_extent_.width()/pixmap_.width());
        double half_stroke = stroke_.get_width()/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(sym.offset()) > 0)
            padding *= std::fabs(sym.offset()) * 1.2;
        padding *= scale_factor_;
        clipping_extent.pad(padding);
    }

    vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
        converter(clipping_extent,*ras_ptr,sym,t_,prj_trans,tr,scale_factor_);
    if (sym.clip()) converter.set<clip_line_tag>(); // optional clip (default: true)
    converter.set<transform_tag>(); // always transform
    if (std::fabs(sym.offset()) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (sym.simplify_tolerance() > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (sym.smooth() > 0.0) converter.set<smooth_tag>(); // optional smooth converter
    if (stroke_.has_dash()) converter.set<dash_tag>();
    converter.set<stroke_tag>(); //always stroke

    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }

    // render id
    ren.color(color_type(feature.id()));
    ras_ptr->filling_rule(agg::fill_non_zero);
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);

}
void grid_renderer<T>::process(line_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    using pixfmt_type = typename grid_renderer_base_type::pixfmt_type;
    using color_type = typename grid_renderer_base_type::pixfmt_type::color_type;
    using renderer_type = agg::renderer_scanline_bin_solid<grid_renderer_base_type>;
    using conv_types = boost::mpl::vector<clip_line_tag, transform_tag,
                                          offset_transform_tag, affine_transform_tag,
                                          simplify_tag, smooth_tag, dash_tag, stroke_tag>;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), common_.width_, common_.height_, common_.width_);
    pixfmt_type pixf(buf);

    grid_renderer_base_type renb(pixf);
    renderer_type ren(renb);

    ras_ptr->reset();

    agg::trans_affine tr;
    auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (transform)
    {
        evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);
    }

    box2d<double> clipping_extent = common_.query_extent_;

    bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, true);
    double width = get<value_double>(sym, keys::stroke_width, feature, common_.vars_,1.0);
    double offset = get<value_double>(sym, keys::offset, feature, common_.vars_,0.0);
    double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_,0.0);
    double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_,false);
    bool has_dash = has_key<dash_array>(sym, keys::stroke_dasharray);

    if (clip)
    {
        double padding = (double)(common_.query_extent_.width()/pixmap_.width());
        double half_stroke = width/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(offset) > 0)
            padding *= std::fabs(offset) * 1.2;
        padding *= common_.scale_factor_;
        clipping_extent.pad(padding);
    }

    vertex_converter<box2d<double>, grid_rasterizer, line_symbolizer,
                     CoordTransform, proj_transform, agg::trans_affine, conv_types, feature_impl>
        converter(clipping_extent,*ras_ptr,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);
    if (clip) converter.set<clip_line_tag>(); // optional clip (default: true)
    converter.set<transform_tag>(); // always transform
    if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter
    if (has_dash) converter.set<dash_tag>();
    converter.set<stroke_tag>(); //always stroke

    for ( geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }

    // render id
    ren.color(color_type(feature.id()));
    ras_ptr->filling_rule(agg::fill_non_zero);
    agg::render_scanlines(*ras_ptr, sl, ren);

    // add feature properties to grid cache
    pixmap_.add_feature(feature);

}
void render_building_symbolizer(mapnik::feature_impl &feature,
                                double height,
                                F1 face_func, F2 frame_func, F3 roof_func)
{
    for (auto const& geom : feature.paths())
    {
        if (geom.size() > 2)
        {
            const std::unique_ptr<geometry_type> frame(new geometry_type(geometry_type::types::LineString));
            const std::unique_ptr<geometry_type> roof(new geometry_type(geometry_type::types::Polygon));
            std::deque<segment_t> face_segments;
            double x0 = 0;
            double y0 = 0;
            double x,y;
            geom.rewind(0);
            for (unsigned cm = geom.vertex(&x, &y); cm != SEG_END;
                 cm = geom.vertex(&x, &y))
            {
                if (cm == SEG_MOVETO)
                {
                    frame->move_to(x,y);
                }
                else if (cm == SEG_LINETO)
                {
                    frame->line_to(x,y);
                    face_segments.push_back(segment_t(x0,y0,x,y));
                }
                else if (cm == SEG_CLOSE)
                {
                    frame->close_path();
                }
                x0 = x;
                y0 = y;
            }

            std::sort(face_segments.begin(),face_segments.end(), y_order);
            for (auto const& seg : face_segments)
            {
                const std::unique_ptr<geometry_type> faces(new geometry_type(geometry_type::types::Polygon));
                faces->move_to(std::get<0>(seg),std::get<1>(seg));
                faces->line_to(std::get<2>(seg),std::get<3>(seg));
                faces->line_to(std::get<2>(seg),std::get<3>(seg) + height);
                faces->line_to(std::get<0>(seg),std::get<1>(seg) + height);

                face_func(*faces);
                //
                frame->move_to(std::get<0>(seg),std::get<1>(seg));
                frame->line_to(std::get<0>(seg),std::get<1>(seg)+height);

            }

            geom.rewind(0);
            for (unsigned cm = geom.vertex(&x, &y); cm != SEG_END;
                 cm = geom.vertex(&x, &y))
            {
                if (cm == SEG_MOVETO)
                {
                    frame->move_to(x,y+height);
                    roof->move_to(x,y+height);
                }
                else if (cm == SEG_LINETO)
                {
                    frame->line_to(x,y+height);
                    roof->line_to(x,y+height);
                }
                else if (cm == SEG_CLOSE)
                {
                    frame->close_path();
                    roof->close_path();
                }
            }

            frame_func(*frame);
            roof_func(*roof);
        }
    }
}
void grid_renderer<T>::process(markers_symbolizer const& sym,
                               mapnik::feature_impl & feature,
                               proj_transform const& prj_trans)
{
    typedef grid_rendering_buffer buf_type;
    typedef typename grid_renderer_base_type::pixfmt_type pixfmt_type;
    typedef typename grid_renderer_base_type::pixfmt_type::color_type color_type;
    typedef agg::renderer_scanline_bin_solid<grid_renderer_base_type> renderer_type;
    typedef label_collision_detector4 detector_type;
    typedef boost::mpl::vector<clip_line_tag,clip_poly_tag,transform_tag,smooth_tag> conv_types;

    std::string filename = path_processor_type::evaluate(*sym.get_filename(), feature);

    if (!filename.empty())
    {
        boost::optional<marker_ptr> mark = mapnik::marker_cache::instance().find(filename, true);
        if (mark && *mark)
        {
            ras_ptr->reset();
            agg::trans_affine geom_tr;
            evaluate_transform(geom_tr, feature, sym.get_transform());
            agg::trans_affine tr = agg::trans_affine_scaling(scale_factor_*(1.0/pixmap_.get_resolution()));

            if ((*mark)->is_vector())
            {
                using namespace mapnik::svg;
                typedef agg::pod_bvector<path_attributes> svg_attribute_type;
                typedef svg_renderer_agg<svg_path_adapter,
                                     svg_attribute_type,
                                     renderer_type,
                                     pixfmt_type > svg_renderer_type;
                typedef vector_markers_rasterizer_dispatch_grid<buf_type,
                                     svg_renderer_type,
                                     grid_rasterizer,
                                     detector_type,
                                     mapnik::grid > dispatch_type;
                boost::optional<svg_path_ptr> const& stock_vector_marker = (*mark)->get_vector_data();
                expression_ptr const& width_expr = sym.get_width();
                expression_ptr const& height_expr = sym.get_height();

                // special case for simple ellipse markers
                // to allow for full control over rx/ry dimensions
                if (filename == "shape://ellipse"
                   && (width_expr || height_expr))
                {
                    svg_storage_type marker_ellipse;
                    vertex_stl_adapter<svg_path_storage> stl_storage(marker_ellipse.source());
                    svg_path_adapter svg_path(stl_storage);
                    // TODO - clamping to >= 4 pixels
                    build_ellipse(sym, feature, marker_ellipse, svg_path);
                    svg_attribute_type attributes;
                    bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
                    svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
                    evaluate_transform(tr, feature, sym.get_image_transform());
                    box2d<double> bbox = marker_ellipse.bounding_box();
                    coord2d center = bbox.center();
                    agg::trans_affine_translation recenter(-center.x, -center.y);
                    agg::trans_affine marker_trans = recenter * tr;
                    buf_type render_buf(pixmap_.raw_data(), width_, height_, width_);
                    dispatch_type rasterizer_dispatch(render_buf,
                                                      svg_renderer,
                                                      *ras_ptr,
                                                      bbox,
                                                      marker_trans,
                                                      sym,
                                                      *detector_,
                                                      scale_factor_,
                                                      feature,
                                                      pixmap_);
                    vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
                        converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
                    if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
                    {
                        eGeomType type = feature.paths()[0].type();
                        if (type == Polygon)
                            converter.template set<clip_poly_tag>();
                        // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                        //else if (type == LineString)
                        //    converter.template set<clip_line_tag>();
                        // don't clip if type==Point
                    }
                    converter.template set<transform_tag>(); //always transform
                    if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                    apply_markers_multi(feature, converter, sym);
                }
                else
                {
                    box2d<double> const& bbox = (*mark)->bounding_box();
                    setup_transform_scaling(tr, bbox.width(), bbox.height(), feature, sym);
                    evaluate_transform(tr, feature, sym.get_image_transform());
                    // TODO - clamping to >= 4 pixels
                    coord2d center = bbox.center();
                    agg::trans_affine_translation recenter(-center.x, -center.y);
                    agg::trans_affine marker_trans = recenter * tr;
                    vertex_stl_adapter<svg_path_storage> stl_storage((*stock_vector_marker)->source());
                    svg_path_adapter svg_path(stl_storage);
                    svg_attribute_type attributes;
                    bool result = push_explicit_style( (*stock_vector_marker)->attributes(), attributes, sym);
                    svg_renderer_type svg_renderer(svg_path, result ? attributes : (*stock_vector_marker)->attributes());
                    buf_type render_buf(pixmap_.raw_data(), width_, height_, width_);
                    dispatch_type rasterizer_dispatch(render_buf,
                                                      svg_renderer,
                                                      *ras_ptr,
                                                      bbox,
                                                      marker_trans,
                                                      sym,
                                                      *detector_,
                                                      scale_factor_,
                                                      feature,
                                                      pixmap_);
                    vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                     CoordTransform, proj_transform, agg::trans_affine, conv_types>
                        converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
                    if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
                    {
                        eGeomType type = feature.paths()[0].type();
                        if (type == Polygon)
                            converter.template set<clip_poly_tag>();
                        // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                        //else if (type == LineString)
                        //    converter.template set<clip_line_tag>();
                        // don't clip if type==Point
                    }
                    converter.template set<transform_tag>(); //always transform
                    if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                    apply_markers_multi(feature, converter, sym);
                }
            }
            else // raster markers
            {
                setup_transform_scaling(tr, (*mark)->width(), (*mark)->height(), feature, sym);
                evaluate_transform(tr, feature, sym.get_image_transform());
                box2d<double> const& bbox = (*mark)->bounding_box();
                // - clamp sizes to > 4 pixels of interactivity
                coord2d center = bbox.center();
                agg::trans_affine_translation recenter(-center.x, -center.y);
                agg::trans_affine marker_trans = recenter * tr;
                boost::optional<mapnik::image_ptr> marker = (*mark)->get_bitmap_data();
                typedef raster_markers_rasterizer_dispatch_grid<buf_type,
                                                            grid_rasterizer,
                                                            pixfmt_type,
                                                            grid_renderer_base_type,
                                                            renderer_type,
                                                            detector_type,
                                                            mapnik::grid > dispatch_type;
                buf_type render_buf(pixmap_.raw_data(), width_, height_, width_);
                dispatch_type rasterizer_dispatch(render_buf,
                                                  *ras_ptr,
                                                  **marker,
                                                  marker_trans,
                                                  sym,
                                                  *detector_,
                                                  scale_factor_,
                                                  feature,
                                                  pixmap_);
                vertex_converter<box2d<double>, dispatch_type, markers_symbolizer,
                                 CoordTransform, proj_transform, agg::trans_affine, conv_types>
                    converter(query_extent_, rasterizer_dispatch, sym,t_,prj_trans,tr,scale_factor_);
                if (sym.clip() && feature.paths().size() > 0) // optional clip (default: true)
                {
                    eGeomType type = feature.paths()[0].type();
                    if (type == Polygon)
                        converter.template set<clip_poly_tag>();
                    // line clipping disabled due to https://github.com/mapnik/mapnik/issues/1426
                    //else if (type == LineString)
                    //    converter.template set<clip_line_tag>();
                    // don't clip if type==Point
                }
                converter.template set<transform_tag>(); //always transform
                if (sym.smooth() > 0.0) converter.template set<smooth_tag>(); // optional smooth converter
                apply_markers_multi(feature, converter, sym);
            }
        }
    }
}
void  agg_renderer<T0,T1>::process(line_pattern_symbolizer const& sym,
                                   mapnik::feature_impl & feature,
                                   proj_transform const& prj_trans)
{

    using color = agg::rgba8;
    using order = agg::order_rgba;
    using blender_type = agg::comp_op_adaptor_rgba_pre<color, order>;
    using pattern_filter_type = agg::pattern_filter_bilinear_rgba8;
    using pattern_type = agg::line_image_pattern<pattern_filter_type>;
    using pixfmt_type = agg::pixfmt_custom_blend_rgba<blender_type, agg::rendering_buffer>;
    using renderer_base = agg::renderer_base<pixfmt_type>;
    using renderer_type = agg::renderer_outline_image<renderer_base, pattern_type>;
    using rasterizer_type = agg::rasterizer_outline_aa<renderer_type>;

    std::string filename = get<std::string>(sym, keys::file, feature, common_.vars_);
    if (filename.empty()) return;
    boost::optional<mapnik::marker_ptr> marker_ptr = marker_cache::instance().find(filename, true);
    if (!marker_ptr || !(*marker_ptr)) return;
    boost::optional<image_ptr> pat;
    // TODO - re-implement at renderer level like polygon_pattern symbolizer
    double opacity = get<value_double>(sym, keys::opacity, feature, common_.vars_,1.0);
    if ((*marker_ptr)->is_bitmap())
    {
        pat = (*marker_ptr)->get_bitmap_data();
    }
    else
    {
        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);
        pat = render_pattern(*ras_ptr, **marker_ptr, image_tr, 1.0);
    }

    if (!pat) return;

    bool clip = get<value_bool>(sym, keys::clip, feature, common_.vars_, false);
    double offset = get<value_double>(sym, keys::offset, feature, common_.vars_, 0.0);
    double simplify_tolerance = get<value_double>(sym, keys::simplify_tolerance, feature, common_.vars_, 0.0);
    double smooth = get<value_double>(sym, keys::smooth, feature, common_.vars_, false);

    agg::rendering_buffer buf(current_buffer_->raw_data(),current_buffer_->width(),current_buffer_->height(), current_buffer_->width() * 4);
    pixfmt_type pixf(buf);
    pixf.comp_op(static_cast<agg::comp_op_e>(get<composite_mode_e>(sym, keys::comp_op, feature, common_.vars_, src_over)));
    renderer_base ren_base(pixf);
    agg::pattern_filter_bilinear_rgba8 filter;

    pattern_source source(*(*pat), opacity);
    pattern_type pattern (filter,source);
    renderer_type ren(ren_base, pattern);
    rasterizer_type ras(ren);

    agg::trans_affine tr;
    auto transform = get_optional<transform_type>(sym, keys::geometry_transform);
    if (transform) evaluate_transform(tr, feature, common_.vars_, *transform, common_.scale_factor_);

    box2d<double> clip_box = clipping_extent(common_);
    if (clip)
    {
        double padding = (double)(common_.query_extent_.width()/pixmap_.width());
        double half_stroke = (*marker_ptr)->width()/2.0;
        if (half_stroke > 1)
            padding *= half_stroke;
        if (std::fabs(offset) > 0)
            padding *= std::fabs(offset) * 1.2;
        padding *= common_.scale_factor_;
        clip_box.pad(padding);
    }

    using conv_types = boost::mpl::vector<clip_line_tag, transform_tag,
          affine_transform_tag,
          simplify_tag,smooth_tag,
          offset_transform_tag>;
    vertex_converter<box2d<double>, rasterizer_type, line_pattern_symbolizer,
                     view_transform, proj_transform, agg::trans_affine, conv_types, feature_impl>
                     converter(clip_box,ras,sym,common_.t_,prj_trans,tr,feature,common_.vars_,common_.scale_factor_);

    if (clip) converter.set<clip_line_tag>(); //optional clip (default: true)
    converter.set<transform_tag>(); //always transform
    if (simplify_tolerance > 0.0) converter.set<simplify_tag>(); // optional simplify converter
    if (std::fabs(offset) > 0.0) converter.set<offset_transform_tag>(); // parallel offset
    converter.set<affine_transform_tag>(); // optional affine transform
    if (smooth > 0.0) converter.set<smooth_tag>(); // optional smooth converter

    for (geometry_type & geom : feature.paths())
    {
        if (geom.size() > 1)
        {
            converter.apply(geom);
        }
    }
}