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add basic polygon sorting

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This commit is contained in:
Artem Pavlenko 2012-01-27 09:47:04 +00:00
parent ff44b53583
commit 77772e8470
1 changed files with 27 additions and 8 deletions
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33
include/mapnik/symbolizer_helpers.hpp
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@ -33,6 +33,18 @@
namespace mapnik {
struct greater_bbox_comp
{
bool operator() (geometry_type const* g0, geometry_type const* g1) const
{
box2d<double> b0 = g0->envelope();
box2d<double> b1 = g1->envelope();
return b0.width()*b0.height() > b1.width()*b1.height();
}
};
template <typename FaceManagerT, typename DetectorT>
class text_symbolizer_helper
{
@ -79,7 +91,11 @@ text_placement_info_ptr text_symbolizer_helper<FaceManagerT, DetectorT>::get_pla
Feature const& feature,
proj_transform const& prj_trans)
{
std::vector<geometry_type*> geometries_to_process;
unsigned num_geom = feature.num_geometries();
if (!num_geom) return text_placement_info_ptr(); //Nothing to do
std::vector<geometry_type*> geometries_to_process(num_geom);
if (!initialize_geometries(geometries_to_process,sym, feature, prj_trans))
return text_placement_info_ptr();
@ -94,8 +110,7 @@ text_placement_info_ptr text_symbolizer_helper<FaceManagerT, DetectorT>::get_pla
if (writer.first)
placement->collect_extents = true;
unsigned num_geom = feature.num_geometries();
if (!num_geom) return text_placement_info_ptr(); //Nothing to do
while (placement->next())
{
@ -106,6 +121,7 @@ text_placement_info_ptr text_symbolizer_helper<FaceManagerT, DetectorT>::get_pla
processor.process(*text_, feature);
string_info &info = text_->get_string_info();
/* END TODO */
// text rotation
double angle = 0.0;
if (p.orientation)
{
@ -116,11 +132,12 @@ text_placement_info_ptr text_symbolizer_helper<FaceManagerT, DetectorT>::get_pla
BOOST_FOREACH( geometry_type * geom, geometries_to_process )
{
finder.find_placement(angle, *geom, t_, prj_trans);
if (!placement->placements.size())
continue;
if (writer.first) writer.first->add_text(*placement, font_manager_, feature, t_, writer.second);
return placement;
//if (!placement->placements.size())
// continue;
//if (writer.first) writer.first->add_text(*placement, font_manager_, feature, t_, writer.second);
//return placement;
}
return placement;
}
return text_placement_info_ptr();
}
@ -153,6 +170,8 @@ bool text_symbolizer_helper<FaceManagerT, DetectorT>::initialize_geometries(
geometries_to_process.push_back(const_cast<geometry_type*>(&geom));
}
std::sort(geometries_to_process.begin(), geometries_to_process.end(), greater_bbox_comp());
if (!geometries_to_process.size() > 0)
{
// early return to avoid significant overhead of rendering setup