static boost::python::tuple getinitargs(const shield_symbolizer& s) { std::string filename = path_processor_type::to_string(*s.get_filename()); //(name, font name, font size, font color, image file, image type, width, height) return boost::python::make_tuple( "TODO",//s.get_name(), s.get_face_name(),s.get_text_size(),s.get_fill(),filename,guess_type(filename)); }
void agg_renderer<T>::process(shield_symbolizer const& sym, Feature const& feature, proj_transform const& prj_trans) { typedef coord_transform2<CoordTransform,geometry_type> path_type; text_placement_info_ptr placement_options = sym.get_placement_options()->get_placement_info(); placement_options->next(); placement_options->next_position_only(); UnicodeString text; if( sym.get_no_text() ) text = UnicodeString( " " ); // TODO: fix->use 'space' as the text to render else { expression_ptr name_expr = sym.get_name(); if (!name_expr) return; value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr); text = result.to_unicode(); } if ( sym.get_text_transform() == UPPERCASE) { text = text.toUpper(); } else if ( sym.get_text_transform() == LOWERCASE) { text = text.toLower(); } else if ( sym.get_text_transform() == CAPITALIZE) { text = text.toTitle(NULL); } agg::trans_affine tr; boost::array<double,6> const& m = sym.get_transform(); tr.load_from(&m[0]); 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 (text.length() > 0 && marker) { int w = (*marker)->width(); int h = (*marker)->height(); 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); face_set_ptr faces; if (sym.get_fontset().size() > 0) { faces = font_manager_.get_face_set(sym.get_fontset()); } else { faces = font_manager_.get_face_set(sym.get_face_name()); } stroker_ptr strk = font_manager_.get_stroker(); if (strk && faces->size() > 0) { text_renderer<T> ren(pixmap_, faces, *strk); ren.set_pixel_size(sym.get_text_size() * scale_factor_); ren.set_fill(sym.get_fill()); ren.set_halo_fill(sym.get_halo_fill()); ren.set_halo_radius(sym.get_halo_radius() * scale_factor_); ren.set_opacity(sym.get_text_opacity()); placement_finder<label_collision_detector4> finder(detector_); string_info info(text); faces->get_string_info(info); metawriter_with_properties writer = sym.get_metawriter(); for (unsigned i = 0; i < feature.num_geometries(); ++i) { geometry_type const& geom = feature.get_geometry(i); if (geom.num_points() > 0 ) { path_type path(t_,geom,prj_trans); label_placement_enum how_placed = sym.get_label_placement(); if (how_placed == POINT_PLACEMENT || how_placed == VERTEX_PLACEMENT || how_placed == INTERIOR_PLACEMENT) { // for every vertex, try and place a shield/text geom.rewind(0); placement text_placement(info, sym, scale_factor_, w, h, false); text_placement.avoid_edges = sym.get_avoid_edges(); text_placement.allow_overlap = sym.get_allow_overlap(); if (writer.first) text_placement.collect_extents =true; // needed for inmem metawriter position const& pos = sym.get_displacement(); position const& shield_pos = sym.get_shield_displacement(); for( unsigned jj = 0; jj < geom.num_points(); jj++ ) { double label_x; double label_y; double z=0.0; if( how_placed == VERTEX_PLACEMENT ) geom.vertex(&label_x,&label_y); // by vertex else if( how_placed == INTERIOR_PLACEMENT ) geom.label_interior_position(&label_x,&label_y); else geom.label_position(&label_x, &label_y); // by middle of line or by point prj_trans.backward(label_x,label_y, z); t_.forward(&label_x,&label_y); label_x += boost::get<0>(shield_pos); label_y += boost::get<1>(shield_pos); finder.find_point_placement( text_placement, placement_options, label_x, label_y, 0.0, sym.get_line_spacing(), sym.get_character_spacing()); // check to see if image overlaps anything too, there is only ever 1 placement found for points and verticies if( text_placement.placements.size() > 0) { double x = floor(text_placement.placements[0].starting_x); double y = floor(text_placement.placements[0].starting_y); int px; int py; if( !sym.get_unlock_image() ) { // center image at text center position // remove displacement from image label double lx = x - boost::get<0>(pos); double ly = y - boost::get<1>(pos); px=int(floor(lx - (0.5 * w))) + 1; py=int(floor(ly - (0.5 * h))) + 1; label_ext.re_center(lx,ly); } else { // center image at reference location px=int(floor(label_x - 0.5 * w)); py=int(floor(label_y - 0.5 * h)); label_ext.re_center(label_x,label_y); } if ( sym.get_allow_overlap() || detector_.has_placement(label_ext) ) { render_marker(px,py,**marker,tr,sym.get_opacity()); box2d<double> dim = ren.prepare_glyphs(&text_placement.placements[0]); ren.render(x,y); detector_.insert(label_ext); finder.update_detector(text_placement); if (writer.first) { writer.first->add_box(label_ext, feature, t_, writer.second); writer.first->add_text(text_placement, faces, feature, t_, writer.second); } } } } } else if (geom.num_points() > 1 && how_placed == LINE_PLACEMENT) { placement text_placement(info, sym, scale_factor_, w, h, false); position const& pos = sym.get_displacement(); text_placement.avoid_edges = sym.get_avoid_edges(); text_placement.additional_boxes.push_back( box2d<double>(-0.5 * label_ext.width() - boost::get<0>(pos), -0.5 * label_ext.height() - boost::get<1>(pos), 0.5 * label_ext.width() - boost::get<0>(pos), 0.5 * label_ext.height() - boost::get<1>(pos))); finder.find_point_placements<path_type>(text_placement, placement_options, path); for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ ii) { double x = floor(text_placement.placements[ii].starting_x); double y = floor(text_placement.placements[ii].starting_y); double lx = x - boost::get<0>(pos); double ly = y - boost::get<1>(pos); int px=int(floor(lx - (0.5*w))) + 1; int py=int(floor(ly - (0.5*h))) + 1; label_ext.re_center(lx, ly); render_marker(px,py,**marker,tr,sym.get_opacity()); box2d<double> dim = ren.prepare_glyphs(&text_placement.placements[ii]); ren.render(x,y); if (writer.first) writer.first->add_box(label_ext, feature, t_, writer.second); } finder.update_detector(text_placement); if (writer.first) writer.first->add_text(text_placement, faces, feature, t_, writer.second); } } } } } }