void grid_renderer<T>::process(text_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
text_symbolizer_helper<face_manager<freetype_engine>,
label_collision_detector4> helper(
sym, feature, prj_trans,
width_, height_,
scale_factor_ * (1.0/pixmap_.get_resolution()),
t_, font_manager_, *detector_,
query_extent_);
bool placement_found = false;
text_renderer<T> ren(pixmap_,
font_manager_,
sym.get_halo_rasterizer(),
sym.comp_op(),
scale_factor_);
while (helper.next()) {
placement_found = true;
placements_type const& placements = helper.placements();
for (unsigned int ii = 0; ii < placements.size(); ++ii)
{
ren.prepare_glyphs(placements[ii]);
ren.render_id(feature.id(), placements[ii].center);
}
}
if (placement_found) pixmap_.add_feature(feature);
}
static boost::python::tuple
getinitargs(const text_symbolizer& t)
{
return boost::python::make_tuple("TODO",//t.get_name(),
t.get_face_name(),t.get_text_size(),t.get_fill());
}
void operator () (text_symbolizer const& sym)
{
expression_set::const_iterator it;
expression_set expressions;
sym.get_placement_options()->add_expressions(expressions);
for (it=expressions.begin(); it != expressions.end(); it++)
{
if (*it) boost::apply_visitor(f_attr, **it);
}
collect_transform(sym.get_transform());
}
void agg_renderer<T>::process(text_symbolizer const& sym,
mapnik::feature_impl & feature,
proj_transform const& prj_trans)
{
box2d<double> clip_box = clipping_extent();
text_symbolizer_helper helper(
sym, feature, prj_trans,
width_, height_,
scale_factor_,
t_, font_manager_, *detector_,
clip_box);
agg_text_renderer<T> ren(*current_buffer_, sym.get_halo_rasterizer(), sym.comp_op(), scale_factor_, font_manager_.get_stroker());
placements_list const& placements = helper.get();
for (glyph_positions_ptr glyphs : placements)
{
ren.render(*glyphs);
}
}
void grid_renderer<T>::process(text_symbolizer const& sym,
Feature const& feature,
proj_transform const& prj_trans)
{
typedef coord_transform2<CoordTransform,geometry_type> path_type;
bool placement_found = false;
text_placement_info_ptr placement_options = sym.get_placement_options()->get_placement_info();
while (!placement_found && placement_options->next())
{
expression_ptr name_expr = sym.get_name();
if (!name_expr) return;
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*name_expr);
UnicodeString 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);
}
if ( text.length() <= 0 ) continue;
color const& fill = sym.get_fill();
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 (!(faces->size() > 0 && strk))
{
throw config_error("Unable to find specified font face '" + sym.get_face_name() + "'");
}
text_renderer<T> ren(pixmap_, faces, *strk);
ren.set_pixel_size(placement_options->text_size * (scale_factor_ * (1.0/pixmap_.get_resolution())));
ren.set_fill(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());
// /pixmap_.get_resolution() ?
box2d<double> dims(0,0,width_,height_);
placement_finder<label_collision_detector4> finder(detector_,dims);
string_info info(text);
faces->get_string_info(info);
unsigned num_geom = feature.num_geometries();
for (unsigned i=0; i<num_geom; ++i)
{
geometry_type const& geom = feature.get_geometry(i);
if (geom.num_points() == 0) continue; // don't bother with empty geometries
while (!placement_found && placement_options->next_position_only())
{
placement text_placement(info, sym, scale_factor_);
text_placement.avoid_edges = sym.get_avoid_edges();
if (sym.get_label_placement() == POINT_PLACEMENT ||
sym.get_label_placement() == INTERIOR_PLACEMENT)
{
double label_x, label_y, z=0.0;
if (sym.get_label_placement() == POINT_PLACEMENT)
geom.label_position(&label_x, &label_y);
else
geom.label_interior_position(&label_x, &label_y);
prj_trans.backward(label_x,label_y, z);
t_.forward(&label_x,&label_y);
double angle = 0.0;
expression_ptr angle_expr = sym.get_orientation();
if (angle_expr)
{
// apply rotation
value_type result = boost::apply_visitor(evaluate<Feature,value_type>(feature),*angle_expr);
angle = result.to_double();
}
finder.find_point_placement(text_placement, placement_options,
label_x, label_y,
angle, sym.get_line_spacing(),
sym.get_character_spacing());
finder.update_detector(text_placement);
}
else if ( geom.num_points() > 1 && sym.get_label_placement() == LINE_PLACEMENT)
{
path_type path(t_,geom,prj_trans);
finder.find_line_placements<path_type>(text_placement, placement_options, path);
}
if (!text_placement.placements.size()) continue;
placement_found = true;
for (unsigned int ii = 0; ii < text_placement.placements.size(); ++ii)
{
double x = text_placement.placements[ii].starting_x;
double y = text_placement.placements[ii].starting_y;
ren.prepare_glyphs(&text_placement.placements[ii]);
ren.render_id(feature.id(),x,y,2);
}
}
}
}
if (placement_found)
pixmap_.add_feature(feature);
}
void operator () (text_symbolizer const& sym)
{
names_.insert(sym.get_name());
}
static void
setstate (text_symbolizer& t, boost::python::tuple state)
{
using namespace boost::python;
if (len(state) != 14)
{
PyErr_SetObject(PyExc_ValueError,
("expected 15-item tuple in call to __setstate__; got %s"
% state).ptr()
);
throw_error_already_set();
}
list disp = extract<list>(state[0]);
double dx = extract<double>(disp[0]);
double dy = extract<double>(disp[1]);
t.set_displacement(dx,dy);
t.set_label_placement(extract<label_placement_e>(state[1]));
t.set_vertical_alignment(extract<vertical_alignment_e>(state[2]));
t.set_halo_radius(extract<unsigned>(state[3]));
t.set_halo_fill(extract<color>(state[4]));
t.set_text_ratio(extract<unsigned>(state[5]));
t.set_wrap_width(extract<unsigned>(state[6]));
t.set_label_spacing(extract<unsigned>(state[7]));
t.set_minimum_distance(extract<double>(state[8]));
t.set_allow_overlap(extract<bool>(state[9]));
list anch = extract<list>(state[10]);
double x = extract<double>(anch[0]);
double y = extract<double>(anch[1]);
t.set_anchor(x,y);
t.set_force_odd_labels(extract<bool>(state[11]));
t.set_max_char_angle_delta(extract<double>(state[12]));
list extras = extract<list>(state[13]);
t.set_wrap_char_from_string(extract<std::string>(extras[0]));
t.set_line_spacing(extract<unsigned>(extras[1]));
t.set_character_spacing(extract<unsigned>(extras[2]));
t.set_text_convert(extract<text_convert_e>(extras[3]));
}
static boost::python::tuple
getstate(const text_symbolizer& t)
{
boost::python::list disp = get_displacement_list(t);
boost::python::list anchor = get_anchor_list(t);
// so we do not exceed max args accepted by make_tuple,
// lets put the increasing list of parameters in a list
boost::python::list extras;
extras.append(t.get_wrap_char_string());
extras.append(t.get_line_spacing());
extras.append(t.get_character_spacing());
extras.append(t.get_text_convert());
return boost::python::make_tuple(disp,t.get_label_placement(),
t.get_vertical_alignment(),t.get_halo_radius(),t.get_halo_fill(),t.get_text_ratio(),
t.get_wrap_width(),t.get_label_spacing(),t.get_minimum_distance(),t.get_allow_overlap(),
anchor,t.get_force_odd_labels(),t.get_max_char_angle_delta(),extras
);
}