void operator () (point_symbolizer const& sym)
{
path_expression_ptr const& filename_expr = sym.get_filename();
if (filename_expr)
{
path_processor_type::collect_attributes(*filename_expr,names_);
}
collect_transform(sym.get_image_transform());
collect_transform(sym.get_transform());
}
void agg_renderer<T>::process(point_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<mapnik::marker_ptr> marker;
if ( !filename.empty() )
{
marker = marker_cache::instance()->find(filename, true);
}
else
{
marker.reset(boost::make_shared<mapnik::marker>());
}
if (marker)
{
box2d<double> const& bbox = (*marker)->bounding_box();
coord2d center = bbox.center();
agg::trans_affine tr;
evaluate_transform(tr, feature, sym.get_image_transform());
agg::trans_affine_translation recenter(-center.x, -center.y);
agg::trans_affine recenter_tr = recenter * tr;
box2d<double> label_ext = bbox * recenter_tr;
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)
{
if (!label::centroid(geom, x, y))
return;
}
else
{
if (!label::interior_position(geom ,x, y))
return;
}
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, y),
**marker,
tr,
sym.get_opacity(),
sym.comp_op());
if (!sym.get_ignore_placement())
detector_->insert(label_ext);
}
}
}
}
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_image_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(), sym.comp_op());
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);
}
}
}
}