/usr/include/vector_tile_datasource.hpp is in mapnik-vector-tile 0.3.2+dfsg-1build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 | #ifndef __MAPNIK_VECTOR_TILE_DATASOURCE_H__
#define __MAPNIK_VECTOR_TILE_DATASOURCE_H__
#include "vector_tile.pb.h"
#include "vector_tile_projection.hpp"
#include <mapnik/box2d.hpp>
#include <mapnik/coord.hpp>
#include <mapnik/feature_layer_desc.hpp>
#include <mapnik/geometry.hpp>
#include <mapnik/params.hpp>
#include <mapnik/query.hpp>
#include <mapnik/unicode.hpp>
#include <mapnik/version.hpp>
#include <mapnik/value_types.hpp>
#include <mapnik/well_known_srs.hpp>
#include <mapnik/vertex.hpp>
#include <mapnik/datasource.hpp>
#include <mapnik/feature.hpp>
#include <mapnik/feature_factory.hpp>
#include <mapnik/geom_util.hpp>
#include <memory>
#include <stdexcept>
#include <string>
#include <boost/optional.hpp>
#include <boost/ptr_container/ptr_vector.hpp>
#include <boost/make_shared.hpp>
#include <boost/shared_ptr.hpp>
#include <unicode/unistr.h>
#include <boost/algorithm/string.hpp>
namespace mapnik { namespace vector {
template <typename Filter>
class tile_featureset : public Featureset
{
public:
tile_featureset(Filter const& filter,
std::set<std::string> const& attribute_names,
mapnik::vector::tile_layer const& layer,
double tile_x,
double tile_y,
double scale)
: filter_(filter),
layer_(layer),
tile_x_(tile_x),
tile_y_(tile_y),
scale_(scale),
itr_(0),
end_(layer_.features_size()),
tr_("utf-8"),
ctx_(boost::make_shared<mapnik::context_type>())
{
std::set<std::string>::const_iterator pos = attribute_names.begin();
std::set<std::string>::const_iterator end = attribute_names.end();
for ( ;pos !=end; ++pos)
{
for (int i = 0; i < layer_.keys_size(); ++i)
{
if (layer_.keys(i) == *pos)
{
ctx_->push(*pos);
break;
}
}
}
}
virtual ~tile_featureset() {}
feature_ptr next()
{
while (itr_ < end_)
{
mapnik::vector::tile_feature const& f = layer_.features(itr_);
mapnik::value_integer feature_id = itr_++;
std::auto_ptr<mapnik::geometry_type> geom(
new mapnik::geometry_type(
mapnik::eGeomType(f.type())));
int cmd = -1;
const int cmd_bits = 3;
unsigned length = 0;
double x = tile_x_, y = tile_y_;
bool first = true;
mapnik::box2d<double> envelope;
for (int k = 0; k < f.geometry_size();)
{
if (!length) {
unsigned cmd_length = f.geometry(k++);
cmd = cmd_length & ((1 << cmd_bits) - 1);
length = cmd_length >> cmd_bits;
}
if (length > 0) {
length--;
if (cmd == mapnik::SEG_MOVETO || cmd == mapnik::SEG_LINETO)
{
int32_t dx = f.geometry(k++);
int32_t dy = f.geometry(k++);
dx = ((dx >> 1) ^ (-(dx & 1)));
dy = ((dy >> 1) ^ (-(dy & 1)));
x += (static_cast<double>(dx) / scale_);
y -= (static_cast<double>(dy) / scale_);
if (first)
{
envelope.init(x,y,x,y);
first = false;
}
else
{
envelope.expand_to_include(x,y);
}
geom->push_vertex(x, y, static_cast<mapnik::CommandType>(cmd));
}
else if (cmd == (mapnik::SEG_CLOSE & ((1 << cmd_bits) - 1)))
{
geom->push_vertex(0, 0, mapnik::SEG_CLOSE);
}
else
{
throw std::runtime_error("Unknown command type");
}
}
}
if (!filter_.pass(envelope))
{
continue;
}
// if encoded feature was given an id, respect it
// TODO: id should not be optional!
// https://github.com/mapbox/mapnik-vector-tile/issues/17
// https://github.com/mapbox/mapnik-vector-tile/issues/18
if (f.has_id())
{
feature_id = f.id();
}
mapnik::feature_ptr feature(
mapnik::feature_factory::create(ctx_,feature_id));
feature->paths().push_back(geom);
// attributes
for (int m = 0; m < f.tags_size(); m += 2)
{
std::size_t key_name = f.tags(m);
std::size_t key_value = f.tags(m + 1);
if (key_name < static_cast<std::size_t>(layer_.keys_size())
&& key_value < static_cast<std::size_t>(layer_.values_size()))
{
std::string const& name = layer_.keys(key_name);
if (feature->has_key(name))
{
mapnik::vector::tile_value const& value = layer_.values(key_value);
if (value.has_string_value())
{
std::string str = value.string_value();
feature->put(name, tr_.transcode(str.data(), str.length()));
}
else if (value.has_int_value())
{
mapnik::value_integer val = value.int_value();
feature->put(name, val);
}
else if (value.has_double_value())
{
mapnik::value_double val = value.double_value();
feature->put(name, val);
}
else if (value.has_float_value())
{
mapnik::value_double val = value.float_value();
feature->put(name, val);
}
else if (value.has_bool_value())
{
mapnik::value_bool val = value.bool_value();
feature->put(name, val);
}
else if (value.has_sint_value())
{
mapnik::value_integer val = value.sint_value();
feature->put(name, val);
}
else if (value.has_uint_value())
{
mapnik::value_integer val = value.uint_value();
feature->put(name, val);
}
else
{
// Do nothing
//feature->put_new(name, mapnik::value_null());
}
}
}
}
return feature;
}
return feature_ptr();
}
private:
Filter filter_;
mapnik::vector::tile_layer const& layer_;
double tile_x_;
double tile_y_;
double scale_;
unsigned itr_;
unsigned end_;
mapnik::transcoder tr_;
mapnik::context_ptr ctx_;
};
class tile_datasource : public datasource
{
public:
tile_datasource(mapnik::vector::tile_layer const& layer,
unsigned x,
unsigned y,
unsigned z,
unsigned tile_size);
virtual ~tile_datasource();
datasource::datasource_t type() const;
featureset_ptr features(query const& q) const;
featureset_ptr features_at_point(coord2d const& pt, double tol = 0) const;
void set_envelope(box2d<double> const& bbox);
box2d<double> envelope() const;
boost::optional<geometry_t> get_geometry_type() const;
layer_descriptor get_descriptor() const;
private:
mutable mapnik::layer_descriptor desc_;
mutable bool attributes_added_;
mapnik::vector::tile_layer const& layer_;
unsigned x_;
unsigned y_;
unsigned z_;
unsigned tile_size_;
mutable bool extent_initialized_;
mutable mapnik::box2d<double> extent_;
double tile_x_;
double tile_y_;
double scale_;
};
// tile_datasource impl
inline tile_datasource::tile_datasource(mapnik::vector::tile_layer const& layer,
unsigned x,
unsigned y,
unsigned z,
unsigned tile_size)
: datasource(parameters()),
desc_("in-memory datasource","utf-8"),
attributes_added_(false),
layer_(layer),
x_(x),
y_(y),
z_(z),
tile_size_(tile_size),
extent_initialized_(false) {
double resolution = mapnik::EARTH_CIRCUMFERENCE/(1 << z_);
tile_x_ = -0.5 * mapnik::EARTH_CIRCUMFERENCE + x_ * resolution;
tile_y_ = 0.5 * mapnik::EARTH_CIRCUMFERENCE - y_ * resolution;
scale_ = (static_cast<double>(layer_.extent()) / tile_size_) * tile_size_/resolution;
}
inline tile_datasource::~tile_datasource() {}
inline datasource::datasource_t tile_datasource::type() const
{
return datasource::Vector;
}
inline featureset_ptr tile_datasource::features(query const& q) const
{
mapnik::filter_in_box filter(q.get_bbox());
return boost::make_shared<tile_featureset<mapnik::filter_in_box> >
(filter, q.property_names(), layer_, tile_x_, tile_y_, scale_);
}
inline featureset_ptr tile_datasource::features_at_point(coord2d const& pt, double tol) const
{
mapnik::filter_at_point filter(pt,tol);
std::set<std::string> names;
for (int i = 0; i < layer_.keys_size(); ++i)
{
names.insert(layer_.keys(i));
}
return boost::make_shared<tile_featureset<filter_at_point> >
(filter, names, layer_, tile_x_, tile_y_, scale_);
}
inline void tile_datasource::set_envelope(box2d<double> const& bbox)
{
extent_initialized_ = true;
extent_ = bbox;
}
inline box2d<double> tile_datasource::envelope() const
{
if (!extent_initialized_)
{
mapnik::vector::spherical_mercator merc(tile_size_);
double minx,miny,maxx,maxy;
merc.xyz(x_,y_,z_,minx,miny,maxx,maxy);
extent_.init(minx,miny,maxx,maxy);
extent_initialized_ = true;
}
return extent_;
}
inline boost::optional<datasource::geometry_t> tile_datasource::get_geometry_type() const
{
return datasource::Collection;
}
inline layer_descriptor tile_datasource::get_descriptor() const
{
if (!attributes_added_)
{
for (int i = 0; i < layer_.keys_size(); ++i)
{
// Object type here because we don't know the precise value until features are unpacked
desc_.add_descriptor(attribute_descriptor(layer_.keys(i), Object));
}
attributes_added_ = true;
}
return desc_;
}
}} // end ns
#endif // __MAPNIK_VECTOR_TILE_DATASOURCE_H__
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