void  agg_renderer<T>::process(line_pattern_symbolizer const& sym,
                               mapnik::feature_ptr const& feature,
                               proj_transform const& prj_trans)
{
    typedef agg::conv_clip_polyline<geometry_type> clipped_geometry_type;
    typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
    typedef agg::line_image_pattern<agg::pattern_filter_bilinear_rgba8> pattern_type;
    typedef agg::renderer_base<agg::pixfmt_rgba32_plain> renderer_base;
    typedef agg::renderer_outline_image<renderer_base, pattern_type> renderer_type;
    typedef agg::rasterizer_outline_aa<renderer_type> rasterizer_type;

    agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
    agg::pixfmt_rgba32_plain pixf(buf);

    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())
    {
        std::clog << "### Warning only images (not '" << filename << "') are supported in the line_pattern_symbolizer\n";
        return;
    }

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

    if (!pat) return;

    box2d<double> ext = query_extent_ * 1.1;
    renderer_base ren_base(pixf);
    agg::pattern_filter_bilinear_rgba8 filter;
    pattern_source source(*(*pat));
    pattern_type pattern (filter,source);
    renderer_type ren(ren_base, pattern);
    // TODO - should be sensitive to buffer size
    ren.clip_box(0,0,width_,height_);
    rasterizer_type ras(ren);
    //metawriter_with_properties writer = sym.get_metawriter();
    for (unsigned i=0;i<feature->num_geometries();++i)
    {
        geometry_type & geom = feature->get_geometry(i);
        if (geom.num_points() > 1)
        {
            clipped_geometry_type clipped(geom);
            clipped.clip_box(ext.minx(),ext.miny(),ext.maxx(),ext.maxy());
            path_type path(t_,clipped,prj_trans);
            ras.add_path(path);
            //if (writer.first) writer.first->add_line(path, *feature, t_, writer.second);
        }
    }
}
Example #2
0
void grid_renderer<T>::process(line_pattern_symbolizer const& sym,
                               mapnik::feature_ptr const& feature,
                               proj_transform const& prj_trans)
{
    typedef coord_transform2<CoordTransform,geometry_type> path_type;
    typedef agg::renderer_base<mapnik::pixfmt_gray16> ren_base;
    typedef agg::renderer_scanline_bin_solid<ren_base> renderer;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    mapnik::pixfmt_gray16 pixf(buf);

    ren_base renb(pixf);
    renderer ren(renb);

    ras_ptr->reset();

    // TODO - actually handle image dimensions
    int stroke_width = 2;

    for (unsigned i=0;i<feature->num_geometries();++i)
    {
        geometry_type const& geom = feature->get_geometry(i);
        if (geom.num_points() > 1)
        {
            path_type path(t_,geom,prj_trans);
            agg::conv_stroke<path_type> stroke(path);
            stroke.generator().miter_limit(4.0);
            stroke.generator().width(stroke_width * scale_factor_);
            ras_ptr->add_path(stroke);
        }
    }

    // render id
    ren.color(mapnik::gray16(feature->id()));
    agg::render_scanlines(*ras_ptr, sl, ren);

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

}
void agg_renderer<T>::process(point_symbolizer const& sym,
                              mapnik::feature_ptr const& feature,
                              proj_transform const& prj_trans)
{
    std::string filename = path_processor_type::evaluate(*sym.get_filename(), *feature);

    boost::optional<mapnik::marker_ptr> marker;
    if ( !filename.empty() )
    {
        marker = marker_cache::instance()->find(filename, true);
    }
    else
    {
        marker.reset(boost::make_shared<mapnik::marker>());
    }

    if (marker)
    {
        double w = (*marker)->width();
        double h = (*marker)->height();
        agg::trans_affine tr;
        boost::array<double,6> const& m = sym.get_transform();
        tr.load_from(&m[0]);
        double px0 = - 0.5 * w;
        double py0 = - 0.5 * h;
        double px1 = 0.5 * w;
        double py1 = 0.5 * h;
        double px2 = px1;
        double py2 = py0;
        double px3 = px0;
        double py3 = py1;
        tr.transform(&px0,&py0);
        tr.transform(&px1,&py1);
        tr.transform(&px2,&py2);
        tr.transform(&px3,&py3);
        box2d<double> label_ext (px0, py0, px1, py1);
        label_ext.expand_to_include(px2, py2);
        label_ext.expand_to_include(px3, py3);

        for (unsigned i=0; i<feature->num_geometries(); ++i)
        {
            geometry_type const& geom = feature->get_geometry(i);
            double x;
            double y;
            double z=0;
            if (sym.get_point_placement() == CENTROID_POINT_PLACEMENT)
                geom.label_position(&x, &y);
            else
                geom.label_interior_position(&x, &y);

            prj_trans.backward(x,y,z);
            t_.forward(&x,&y);
            label_ext.re_center(x,y);

            if (sym.get_allow_overlap() ||
                detector_->has_placement(label_ext))
            {

                render_marker(pixel_position(x - 0.5 * w, y - 0.5 * h) ,**marker,tr, sym.get_opacity());

                if (!sym.get_ignore_placement())
                    detector_->insert(label_ext);
                metawriter_with_properties writer = sym.get_metawriter();
                if (writer.first) writer.first->add_box(label_ext, *feature, t_, writer.second);
            }
        }
    }

}
void agg_renderer<T>::process(polygon_pattern_symbolizer const& sym,
                              mapnik::feature_ptr const& feature,
                              proj_transform const& prj_trans)
{
    typedef agg::conv_clip_polygon<geometry_type> clipped_geometry_type;
    typedef coord_transform2<CoordTransform,clipped_geometry_type> path_type;
    typedef agg::renderer_base<agg::pixfmt_rgba32_plain> ren_base;
    typedef agg::wrap_mode_repeat wrap_x_type;
    typedef agg::wrap_mode_repeat wrap_y_type;
    typedef agg::pixfmt_alpha_blend_rgba<agg::blender_rgba32_plain,
        agg::row_accessor<agg::int8u>, agg::pixel32_type> rendering_buffer;
    typedef agg::image_accessor_wrap<rendering_buffer,
        wrap_x_type,
        wrap_y_type> img_source_type;

    typedef agg::span_pattern_rgba<img_source_type> span_gen_type;

    typedef agg::renderer_scanline_aa<ren_base,
        agg::span_allocator<agg::rgba8>,
        span_gen_type> renderer_type;


    agg::rendering_buffer buf(pixmap_.raw_data(),width_,height_, width_ * 4);
    agg::pixfmt_rgba32_plain pixf(buf);
    ren_base renb(pixf);

    agg::scanline_u8 sl;
    ras_ptr->reset();
    set_gamma_method(sym,ras_ptr);

    std::string filename = path_processor_type::evaluate( *sym.get_filename(), *feature);
    boost::optional<mapnik::marker_ptr> marker;
    if ( !filename.empty() )
    {
        marker = marker_cache::instance()->find(filename, true);
    }
    else
    {
        std::clog << "### Warning: file not found: " << filename << "\n";
    }

    if (!marker) return;

    if (!(*marker)->is_bitmap())
    {
        std::clog << "### Warning only images (not '" << filename << "') are supported in the polygon_pattern_symbolizer\n";
        return;
    }


    boost::optional<image_ptr> pat = (*marker)->get_bitmap_data();

    if (!pat) return;

    unsigned w=(*pat)->width();
    unsigned h=(*pat)->height();
    agg::row_accessor<agg::int8u> pattern_rbuf((agg::int8u*)(*pat)->getBytes(),w,h,w*4);
    agg::span_allocator<agg::rgba8> sa;
    agg::pixfmt_alpha_blend_rgba<agg::blender_rgba32_plain,
        agg::row_accessor<agg::int8u>, agg::pixel32_type> pixf_pattern(pattern_rbuf);
    img_source_type img_src(pixf_pattern);

    unsigned num_geometries = feature->num_geometries();

    pattern_alignment_e align = sym.get_alignment();
    unsigned offset_x=0;
    unsigned offset_y=0;

    if (align == LOCAL_ALIGNMENT)
    {
        double x0=0,y0=0;
        if (num_geometries>0) // FIXME: hmm...?
        {
            clipped_geometry_type clipped(feature->get_geometry(0));
            clipped.clip_box(query_extent_.minx(),query_extent_.miny(),query_extent_.maxx(),query_extent_.maxy());
            path_type path(t_,clipped,prj_trans);
            path.vertex(&x0,&y0);
        }
        offset_x = unsigned(width_-x0);
        offset_y = unsigned(height_-y0);
    }

    span_gen_type sg(img_src, offset_x, offset_y);
    renderer_type rp(renb,sa, sg);
    //metawriter_with_properties writer = sym.get_metawriter();
    for (unsigned i=0;i<num_geometries;++i)
    {
        geometry_type & geom = feature->get_geometry(i);
        if (geom.num_points() > 2)
        {
            clipped_geometry_type clipped(geom);
            clipped.clip_box(query_extent_.minx(),query_extent_.miny(),query_extent_.maxx(),query_extent_.maxy());
            path_type path(t_,clipped,prj_trans);
            ras_ptr->add_path(path);
            //if (writer.first) writer.first->add_polygon(path, *feature, t_, writer.second);
        }
    }
    agg::render_scanlines(*ras_ptr, sl, rp);
}
void grid_renderer<T>::process(line_symbolizer const& sym,
                               mapnik::feature_ptr const& feature,
                               proj_transform const& prj_trans)
{
    typedef coord_transform2<CoordTransform,geometry_type> path_type;
    typedef agg::renderer_base<mapnik::pixfmt_gray16> ren_base;
    typedef agg::renderer_scanline_bin_solid<ren_base> renderer;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    mapnik::pixfmt_gray16 pixf(buf);

    ren_base renb(pixf);
    renderer ren(renb);

    ras_ptr->reset();

    stroke const&  stroke_ = sym.get_stroke();

    for (unsigned i=0;i<feature->num_geometries();++i)
    {
        geometry_type & geom = feature->get_geometry(i);
        if (geom.num_points() > 1)
        {
            path_type path(t_,geom,prj_trans);

            if (stroke_.has_dash())
            {
                agg::conv_dash<path_type> dash(path);
                dash_array const& d = stroke_.get_dash_array();
                dash_array::const_iterator itr = d.begin();
                dash_array::const_iterator end = d.end();
                for (;itr != end;++itr)
                {
                    dash.add_dash(itr->first * scale_factor_,
                                  itr->second * scale_factor_);
                }

                agg::conv_stroke<agg::conv_dash<path_type > > stroke(dash);

                line_join_e join=stroke_.get_line_join();
                if ( join == MITER_JOIN)
                    stroke.generator().line_join(agg::miter_join);
                else if( join == MITER_REVERT_JOIN)
                    stroke.generator().line_join(agg::miter_join);
                else if( join == ROUND_JOIN)
                    stroke.generator().line_join(agg::round_join);
                else
                    stroke.generator().line_join(agg::bevel_join);

                line_cap_e cap=stroke_.get_line_cap();
                if (cap == BUTT_CAP)
                    stroke.generator().line_cap(agg::butt_cap);
                else if (cap == SQUARE_CAP)
                    stroke.generator().line_cap(agg::square_cap);
                else
                    stroke.generator().line_cap(agg::round_cap);

                stroke.generator().miter_limit(4.0);
                stroke.generator().width(stroke_.get_width() * scale_factor_);

                ras_ptr->add_path(stroke);

            }
            else
            {
                agg::conv_stroke<path_type>  stroke(path);
                line_join_e join=stroke_.get_line_join();
                if ( join == MITER_JOIN)
                    stroke.generator().line_join(agg::miter_join);
                else if( join == MITER_REVERT_JOIN)
                    stroke.generator().line_join(agg::miter_join);
                else if( join == ROUND_JOIN)
                    stroke.generator().line_join(agg::round_join);
                else
                    stroke.generator().line_join(agg::bevel_join);

                line_cap_e cap=stroke_.get_line_cap();
                if (cap == BUTT_CAP)
                    stroke.generator().line_cap(agg::butt_cap);
                else if (cap == SQUARE_CAP)
                    stroke.generator().line_cap(agg::square_cap);
                else
                    stroke.generator().line_cap(agg::round_cap);

                stroke.generator().miter_limit(4.0);
                stroke.generator().width(stroke_.get_width() * scale_factor_);
                ras_ptr->add_path(stroke);
            }
        }
    }

    // render id
    ren.color(mapnik::gray16(feature->id()));
    agg::render_scanlines(*ras_ptr, sl, ren);

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

}
void grid_renderer<T>::process(markers_symbolizer const& sym,
                               mapnik::feature_ptr const& feature,
                               proj_transform const& prj_trans)
{
    typedef coord_transform2<CoordTransform,geometry_type> path_type;
    typedef agg::renderer_base<mapnik::pixfmt_gray16> ren_base;
    typedef agg::renderer_scanline_bin_solid<ren_base> renderer;
    agg::scanline_bin sl;

    grid_rendering_buffer buf(pixmap_.raw_data(), width_, height_, width_);
    mapnik::pixfmt_gray16 pixf(buf);

    ren_base renb(pixf);
    renderer ren(renb);

    ras_ptr->reset();

    agg::trans_affine tr;
    boost::array<double,6> const& m = sym.get_transform();
    tr.load_from(&m[0]);
    tr = agg::trans_affine_scaling(scale_factor_*(1.0/pixmap_.get_resolution())) * tr;
    std::string filename = path_processor_type::evaluate(*sym.get_filename(), *feature);
    marker_placement_e placement_method = sym.get_marker_placement();
    marker_type_e marker_type = sym.get_marker_type();

    if (!filename.empty())
    {
        boost::optional<marker_ptr> mark = mapnik::marker_cache::instance()->find(filename, true);
        if (mark && *mark && (*mark)->is_vector())
        {
            boost::optional<path_ptr> marker = (*mark)->get_vector_data();
            box2d<double> const& bbox = (*marker)->bounding_box();
            double x1 = bbox.minx();
            double y1 = bbox.miny();
            double x2 = bbox.maxx();
            double y2 = bbox.maxy();

            agg::trans_affine recenter = agg::trans_affine_translation(-0.5*(x1+x2),-0.5*(y1+y2));
            tr.transform(&x1,&y1);
            tr.transform(&x2,&y2);
            box2d<double> extent(x1,y1,x2,y2);
            using namespace mapnik::svg;
            vertex_stl_adapter<svg_path_storage> stl_storage((*marker)->source());
            svg_path_adapter svg_path(stl_storage);
            svg_renderer<svg_path_adapter,
                agg::pod_bvector<path_attributes>,
                renderer,
                mapnik::pixfmt_gray16 > svg_renderer(svg_path,(*marker)->attributes());

            bool placed = false;
            for (unsigned i=0; i<feature->num_geometries(); ++i)
            {
                geometry_type & geom = feature->get_geometry(i);
                if (geom.num_points() <= 1)
                {
                    std::clog << "### Warning svg markers not supported yet for points within markers_symbolizer\n";
                    continue;
                }

                path_type path(t_,geom,prj_trans);
                markers_placement<path_type, label_collision_detector4> placement(path, extent, detector_,
                                                                                  sym.get_spacing() * scale_factor_,
                                                                                  sym.get_max_error(),
                                                                                  sym.get_allow_overlap());
                double x, y, angle;

                while (placement.get_point(&x, &y, &angle))
                {
                    placed = true;
                    agg::trans_affine matrix = recenter * tr *agg::trans_affine_rotation(angle) * agg::trans_affine_translation(x, y);
                    svg_renderer.render_id(*ras_ptr, sl, renb, feature->id(), matrix, sym.get_opacity(),bbox);
                }
            }
            if (placed)
                pixmap_.add_feature(feature);
        }
    }
    else
    {
        stroke const& stroke_ = sym.get_stroke();
        double strk_width = stroke_.get_width();

        double w;
        double h;
        unsigned int res = pixmap_.get_resolution();
        if (res != 1) {
            // clamp to at least 4 px otherwise interactive pixels can be too small
            double min = static_cast<double>(4/pixmap_.get_resolution());
            w = std::max(sym.get_width()/res,min);
            h = std::max(sym.get_height()/res,min);
        } else {
            w = sym.get_width()/res;
            h = sym.get_height()/res;
        }

        arrow arrow_;
        box2d<double> extent;

        double dx = w + (2*strk_width);
        double dy = h + (2*strk_width);

        if (marker_type == ARROW)
        {
            extent = arrow_.extent();
            double x1 = extent.minx();
            double y1 = extent.miny();
            double x2 = extent.maxx();
            double y2 = extent.maxy();
            tr.transform(&x1,&y1);
            tr.transform(&x2,&y2);
            extent.init(x1,y1,x2,y2);
        }
        else
        {
            double x1 = -1 *(dx);
            double y1 = -1 *(dy);
            double x2 = dx;
            double y2 = dy;
            tr.transform(&x1,&y1);
            tr.transform(&x2,&y2);
            extent.init(x1,y1,x2,y2);
        }

        double x;
        double y;
        double z=0;

        for (unsigned i=0; i<feature->num_geometries(); ++i)
        {
            geometry_type & geom = feature->get_geometry(i);
            if (placement_method == MARKER_POINT_PLACEMENT || geom.num_points() <= 1)
            {
                geom.label_position(&x,&y);
                prj_trans.backward(x,y,z);
                t_.forward(&x,&y);
                int px = int(floor(x - 0.5 * dx));
                int py = int(floor(y - 0.5 * dy));
                box2d<double> label_ext (px, py, px + dx +1, py + dy +1);

                if (sym.get_allow_overlap() ||
                    detector_.has_placement(label_ext))
                {
                    agg::ellipse c(x, y, w, h);
                    agg::path_storage marker;
                    marker.concat_path(c);
                    ras_ptr->add_path(marker);

                    // outline
                    if (strk_width)
                    {
                        agg::conv_stroke<agg::path_storage>  outline(marker);
                        outline.generator().width(strk_width * scale_factor_);
                        ras_ptr->add_path(outline);
                    }

                    detector_.insert(label_ext);
                }
            }
            else
            {

                agg::path_storage marker;
                if (marker_type == ARROW)
                    marker.concat_path(arrow_);

                path_type path(t_,geom,prj_trans);
                markers_placement<path_type, label_collision_detector4> placement(path, extent, detector_,
                                                                                  sym.get_spacing() * scale_factor_,
                                                                                  sym.get_max_error(),
                                                                                  sym.get_allow_overlap());
                double x_t, y_t, angle;

                while (placement.get_point(&x_t, &y_t, &angle))
                {
                    agg::trans_affine matrix;

                    if (marker_type == ELLIPSE)
                    {
                        // todo proper bbox - this is buggy
                        agg::ellipse c(x_t, y_t, w, h);
                        marker.concat_path(c);
                        agg::trans_affine matrix;
                        matrix *= agg::trans_affine_translation(-x_t,-y_t);
                        matrix *= agg::trans_affine_rotation(angle);
                        matrix *= agg::trans_affine_translation(x_t,y_t);
                        marker.transform(matrix);
                    }
                    else
                    {
                        matrix = tr * agg::trans_affine_rotation(angle) * agg::trans_affine_translation(x_t, y_t);
                    }

                    agg::conv_transform<agg::path_storage, agg::trans_affine> trans(marker, matrix);

                    // fill
                    ras_ptr->add_path(trans);

                    // outline
                    if (strk_width)
                    {
                        agg::conv_stroke<agg::conv_transform<agg::path_storage, agg::trans_affine> >  outline(trans);
                        outline.generator().width(strk_width * scale_factor_);
                        ras_ptr->add_path(outline);
                    }
                }
            }

        }
        ren.color(mapnik::gray16(feature->id()));
        agg::render_scanlines(*ras_ptr, sl, ren);
        pixmap_.add_feature(feature);
    }
}