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#include <mbgl/map/tile_data.hpp>
#include <mbgl/map/environment.hpp>
#include <mbgl/map/source.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/util/work_request.hpp>
#include <mbgl/util/worker.hpp>
#include <sstream>
using namespace mbgl;
TileData::TileData(const TileID& id_, const SourceInfo& source_)
: id(id_),
name(id),
source(source_),
env(Environment::Get()),
state(State::initial),
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::setState(const State& state_) {
assert(!isImmutable());
state = state_;
}
void TileData::request(Worker& worker,
float pixelRatio,
const std::function<void()>& successCallback,
const std::function<void(const std::string& message)>& failureCallback) {
std::string url = source.tileURL(id, pixelRatio);
state = State::loading;
req = env.request({ Resource::Kind::Tile, url }, [url, successCallback, failureCallback, &worker, this](const Response &res) {
req = nullptr;
if (res.status != Response::Successful) {
std::stringstream message;
message << "Failed to load [" << url << "]: " << res.message;
failureCallback(message.str());
return;
}
state = State::loaded;
data = res.data;
// Schedule tile parsing in another thread
reparse(worker, successCallback);
});
}
void TileData::cancel() {
if (state != State::obsolete) {
state = State::obsolete;
}
if (req) {
env.cancelRequest(req);
req = nullptr;
}
workRequest.reset();
}
bool TileData::mayStartParsing() {
return !parsing.test_and_set(std::memory_order_acquire);
}
void TileData::endParsing() {
parsing.clear(std::memory_order_release);
}
bool TileData::reparse(Worker& worker, std::function<void()> callback) {
if (!mayStartParsing()) {
return false;
}
workRequest = worker.send([this] { parse(); endParsing(); }, callback);
return true;
}
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