diegoripley/tippecanoe
1
0
Fork 0
mirror of https://github.com/felt/tippecanoe.git synced 2026-10-02 08:25:40 +02:00
Code Issues Packages Projects Releases Wiki Activity

Getting ready for multithreaded tile-joining

Browse Source
This commit is contained in:
Eric Fischer
2016-09-20 11:04:24 -07:00
parent 6c74f4a1cd
commit 021d792d33
4 changed files with 58 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files
mbtiles.cpp
+34
View File
@@ -295,3 +295,37 @@ void mbtiles_close(sqlite3 *outdb, char **argv) {
exit(EXIT_FAILURE);
}
}
std::map<std::string, layermap_entry> merge_layermaps(std::vector<std::map<std::string, layermap_entry> > const &maps) {
std::map<std::string, layermap_entry> out;
for (size_t i = 0; i < maps.size(); i++) {
for (auto map = maps[i].begin(); map != maps[i].end(); ++map) {
if (out.count(map->first) == 0) {
out.insert(std::pair<std::string, layermap_entry>(map->first, layermap_entry(out.size())));
auto out_entry = out.find(map->first);
out_entry->second.minzoom = map->second.minzoom;
out_entry->second.maxzoom = map->second.maxzoom;
}
auto out_entry = out.find(map->first);
if (out_entry == out.end()) {
fprintf(stderr, "Internal error merging layers\n");
exit(EXIT_FAILURE);
}
for (auto fk = map->second.file_keys.begin(); fk != map->second.file_keys.end(); ++fk) {
out_entry->second.file_keys.insert(*fk);
}
if (map->second.minzoom < out_entry->second.minzoom) {
out_entry->second.minzoom = map->second.minzoom;
}
if (map->second.maxzoom > out_entry->second.maxzoom) {
out_entry->second.maxzoom = map->second.maxzoom;
}
}
}
return out;
}