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#include <mbgl/map/tile_data.hpp>
#include <mbgl/map/environment.hpp>
#include <mbgl/map/source.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/util/worker.hpp>
#include <mbgl/platform/log.hpp>
using namespace mbgl;
TileData::TileData(const TileID& id_, const SourceInfo& source_)
: id(id_),
name(id),
state(State::initial),
source(source_),
env(Environment::Get()),
debugBucket(debugFontBuffer) {
// Initialize tile debug coordinates
debugFontBuffer.addText(name.c_str(), 50, 200, 5);
}
TileData::~TileData() {
cancel();
}
const std::string TileData::toString() const {
return std::string { "[tile " } + name + "]";
}
void TileData::request(Worker& worker, float pixelRatio, std::function<void()> callback) {
std::string url = source.tileURL(id, pixelRatio);
state = State::loading;
req = env.request({ Resource::Kind::Tile, url }, [url, callback, &worker, this](const Response &res) {
req = nullptr;
if (res.status != Response::Successful) {
Log::Error(Event::HttpRequest, "[%s] tile loading failed: %s", url.c_str(), res.message.c_str());
return;
}
state = State::loaded;
data = res.data;
// Schedule tile parsing in another thread
reparse(worker, callback);
});
}
void TileData::cancel() {
if (state != State::obsolete) {
state = State::obsolete;
}
if (req) {
env.cancelRequest(req);
req = nullptr;
}
}
void TileData::reparse(Worker& worker, std::function<void()> callback) {
util::ptr<TileData> tile = shared_from_this();
worker.send(
[this]() {
EnvironmentScope scope(env, ThreadType::TileWorker, "TileWorker_" + name);
parse();
},
[tile, callback]() {
// `tile` is bound in this lambda to ensure that if it's the last owning pointer,
// destruction happens on the map thread, not the worker thread. It is _not_ bound
// in the above lambda, because we do not want the possibility to arise that the
// after callback could execute and release the penultimate reference before the
// work callback has been destructed.
callback();
});
}
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