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Make an array of features in each tile to prepare to coalesce features

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This commit is contained in:
Eric Fischer 2014-09-29 14:46:15 -07:00
parent 26e9feda02
commit c02c91df5a
1 changed files with 50 additions and 15 deletions
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65
tile.cc
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@ -436,6 +436,16 @@ int simplify_lines(struct draw *geom, int n, int z, int detail) {
return out;
}
struct coalesce {
int type;
int ngeom;
struct draw *geom;
int nmeta;
int *meta;
};
long long write_tile(struct index *start, struct index *end, char *metabase, unsigned *file_bbox, int z, unsigned tx, unsigned ty, int detail, int basezoom, struct pool *file_keys, char *layername, sqlite3 *outdb) {
GOOGLE_PROTOBUF_VERIFY_VERSION;
@ -460,6 +470,9 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
interval = exp(log(2.5) * (basezoom - z));
}
int nfeatures = 0;
struct coalesce features[end - start];
struct index *i;
for (i = start; i < end; i++) {
int t;
@ -511,24 +524,18 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
}
pv->n = 0;
mapnik::vector::tile_feature *feature = layer->add_features();
features[nfeatures].type = t;
if (t == VT_POINT) {
feature->set_type(mapnik::vector::tile::Point);
} else if (t == VT_LINE) {
feature->set_type(mapnik::vector::tile::LineString);
} else if (t == VT_POLYGON) {
feature->set_type(mapnik::vector::tile::Polygon);
} else {
feature->set_type(mapnik::vector::tile::Unknown);
}
draw(geom, len, feature);
count += len;
features[nfeatures].ngeom = len;
features[nfeatures].geom = (struct draw *) malloc(len * sizeof(struct draw));
memcpy(features[nfeatures].geom, geom, len * sizeof(struct draw));
int m;
deserialize_int(&meta, &m);
features[nfeatures].nmeta = 2 * m;
features[nfeatures].meta = (int *) malloc(2 * m * sizeof(int));
int i;
for (i = 0; i < m; i++) {
int t;
@ -536,15 +543,43 @@ long long write_tile(struct index *start, struct index *end, char *metabase, uns
struct pool_val *key = deserialize_string(&meta, &keys, VT_STRING);
struct pool_val *value = deserialize_string(&meta, &values, t);
feature->add_tags(key->n);
feature->add_tags(value->n);
features[nfeatures].meta[2 * i + 0] = key->n;
features[nfeatures].meta[2 * i + 1] = value->n;
// Dup to retain after munmap
pool(file_keys, strdup(key->s), t);
}
nfeatures++;
}
}
int x;
for (x = 0; x < nfeatures; x++) {
mapnik::vector::tile_feature *feature = layer->add_features();
if (features[x].type == VT_POINT) {
feature->set_type(mapnik::vector::tile::Point);
} else if (features[x].type == VT_LINE) {
feature->set_type(mapnik::vector::tile::LineString);
} else if (features[x].type == VT_POLYGON) {
feature->set_type(mapnik::vector::tile::Polygon);
} else {
feature->set_type(mapnik::vector::tile::Unknown);
}
draw(features[x].geom, features[x].ngeom, feature);
count += features[x].ngeom;
int y;
for (y = 0; y < features[x].nmeta; y++) {
feature->add_tags(features[x].meta[y]);
}
free(features[x].geom);
free(features[x].meta);
}
struct pool_val *pv;
for (pv = keys.head; pv != NULL; pv = pv->next) {
layer->add_keys(pv->s, strlen(pv->s));