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 (symbolizer 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(std::size_t i=0; i<feature.num_geometries(); ++i)
{
geometry_type & geom = feature.get_geometry(i);
if(geom.size() > 0)
{
path_type path(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;
}
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.
using path_type = transform_path_adapter<view_transform, geometry_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;
}
util::apply_visitor(symbolizer_dispatch<svg_renderer<OutputIterator>>(*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);
generate_path(generator_.output_iterator_, 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;
}
