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#include <mbgl/map/map.hpp>
#include <mbgl/map/environment.hpp>
#include <mbgl/map/view.hpp>
#include <mbgl/platform/platform.hpp>
#include <mbgl/renderer/painter.hpp>
#include <mbgl/map/sprite.hpp>
#include <mbgl/util/transition.hpp>
#include <mbgl/util/math.hpp>
#include <mbgl/util/clip_ids.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/constants.hpp>
#include <mbgl/util/uv_detail.hpp>
#include <mbgl/util/std.hpp>
#include <mbgl/style/style.hpp>
#include <mbgl/style/style_layer.hpp>
#include <mbgl/style/style_layer_group.hpp>
#include <mbgl/style/style_bucket.hpp>
#include <mbgl/util/texture_pool.hpp>
#include <mbgl/storage/file_source.hpp>
#include <mbgl/platform/log.hpp>
#include <mbgl/util/string.hpp>
#include <mbgl/util/uv.hpp>
#include <mbgl/util/exception.hpp>
#include <algorithm>
#include <iostream>
#define _USE_MATH_DEFINES
#include <cmath>
#include <uv.h>
// Check libuv library version.
const static bool uvVersionCheck = []() {
const unsigned int version = uv_version();
const unsigned int major = (version >> 16) & 0xFF;
const unsigned int minor = (version >> 8) & 0xFF;
const unsigned int patch = version & 0xFF;
#ifndef UV_VERSION_PATCH
// 0.10 doesn't have UV_VERSION_PATCH defined, so we "fake" it by using the library patch level.
const unsigned int UV_VERSION_PATCH = version & 0xFF;
#endif
if (major != UV_VERSION_MAJOR || minor != UV_VERSION_MINOR || patch != UV_VERSION_PATCH) {
throw std::runtime_error(mbgl::util::sprintf<96>(
"libuv version mismatch: headers report %d.%d.%d, but library reports %d.%d.%d", UV_VERSION_MAJOR,
UV_VERSION_MINOR, UV_VERSION_PATCH, major, minor, patch));
}
return true;
}();
using namespace mbgl;
Map::Map(View& view_, FileSource& fileSource_)
: env(util::make_unique<Environment>(fileSource_)),
view(view_),
mainThread(std::this_thread::get_id()),
mapThread(mainThread),
transform(view_),
fileSource(fileSource_),
texturePool(std::make_shared<TexturePool>()),
painter(util::make_unique<Painter>())
{
view.initialize(this);
}
Map::~Map() {
if (mode == Mode::Continuous) {
stop();
}
// Explicitly reset all pointers.
style.reset();
texturePool.reset();
workers.reset();
uv_run(env->loop, UV_RUN_DEFAULT);
}
uv::worker &Map::getWorker() {
assert(workers);
return *workers;
}
void Map::start(bool startPaused) {
assert(std::this_thread::get_id() == mainThread);
assert(mode == Mode::None);
// When starting map rendering in another thread, we perform async/continuously
// updated rendering. Only in these cases, we attach the async handlers.
mode = Mode::Continuous;
// Reset the flag.
isStopped = false;
// Setup async notifications
asyncTerminate = util::make_unique<uv::async>(env->loop, [this]() {
assert(std::this_thread::get_id() == mapThread);
// Remove all of these to make sure they are destructed in the correct thread.
style.reset();
workers.reset();
terminating = true;
// Closes all open handles on the loop. This means that the loop will automatically terminate.
asyncRender.reset();
asyncUpdate.reset();
asyncTerminate.reset();
});
asyncUpdate = util::make_unique<uv::async>(env->loop, [this] {
assert(std::this_thread::get_id() == mapThread);
if (state.hasSize()) {
prepare();
}
});
asyncRender = util::make_unique<uv::async>(env->loop, [this] {
// Must be called in Map thread.
assert(std::this_thread::get_id() == mapThread);
render();
// Finally, notify all listeners that we have finished rendering this frame.
{
std::lock_guard<std::mutex> lk(mutexRendered);
rendered = true;
}
condRendered.notify_all();
});
// Do we need to pause first?
if (startPaused) {
pause();
}
thread = std::thread([this]() {
#ifdef DEBUG
mapThread = std::this_thread::get_id();
#endif
#ifdef __APPLE__
pthread_setname_np("Map");
#endif
run();
#ifdef DEBUG
mapThread = std::thread::id();
#endif
// Make sure that the stop() function knows when to stop invoking the callback function.
isStopped = true;
view.notify();
});
}
void Map::stop(std::function<void ()> callback) {
assert(std::this_thread::get_id() == mainThread);
assert(mainThread != mapThread);
assert(mode == Mode::Continuous);
asyncTerminate->send();
resume();
if (callback) {
// Wait until the render thread stopped. We are using this construct instead of plainly
// relying on the thread_join because the system might need to run things in the current
// thread that is required for the render thread to terminate correctly. This is for example
// the case with Cocoa's NSURLRequest. Otherwise, we will eventually deadlock because this
// thread (== main thread) is blocked. The callback function should use an efficient waiting
// function to avoid a busy waiting loop.
while (!isStopped) {
callback();
}
}
// If a callback function was provided, this should return immediately because the thread has
// already finished executing.
thread.join();
mode = Mode::None;
}
void Map::pause(bool waitForPause) {
assert(std::this_thread::get_id() == mainThread);
assert(mode == Mode::Continuous);
mutexRun.lock();
pausing = true;
mutexRun.unlock();
uv_stop(env->loop);
triggerUpdate(); // Needed to ensure uv_stop is seen and uv_run exits, otherwise we deadlock on wait_for_pause
if (waitForPause) {
std::unique_lock<std::mutex> lockPause (mutexPause);
while (!isPaused) {
condPause.wait(lockPause);
}
}
}
void Map::resume() {
assert(std::this_thread::get_id() == mainThread);
assert(mode == Mode::Continuous);
mutexRun.lock();
pausing = false;
condRun.notify_all();
mutexRun.unlock();
}
void Map::run() {
if (mode == Mode::None) {
#ifdef DEBUG
mapThread = mainThread;
#endif
mode = Mode::Static;
}
assert(std::this_thread::get_id() == mapThread);
if (mode == Mode::Continuous) {
checkForPause();
}
if (mode == Mode::Static && !style && styleURL.empty()) {
throw util::Exception("Style is not set");
}
view.activate();
workers = util::make_unique<uv::worker>(env->loop, 4, "Tile Worker");
env->setup();
setup();
prepare();
if (mode == Mode::Continuous) {
terminating = false;
while(!terminating) {
uv_run(env->loop, UV_RUN_DEFAULT);
checkForPause();
}
} else {
uv_run(env->loop, UV_RUN_DEFAULT);
}
// Run the event loop once more to make sure our async delete handlers are called.
uv_run(env->loop, UV_RUN_ONCE);
// If the map rendering wasn't started asynchronously, we perform one render
// *after* all events have been processed.
if (mode == Mode::Static) {
render();
#ifdef DEBUG
mapThread = std::thread::id();
#endif
mode = Mode::None;
}
view.deactivate();
}
void Map::renderSync() {
// Must be called in UI thread.
assert(std::this_thread::get_id() == mainThread);
triggerRender();
std::unique_lock<std::mutex> lock(mutexRendered);
condRendered.wait(lock, [this] { return rendered; });
rendered = false;
}
void Map::triggerUpdate() {
if (mode == Mode::Static) {
prepare();
} else if (asyncUpdate) {
asyncUpdate->send();
}
}
void Map::triggerRender() {
assert(asyncRender);
asyncRender->send();
}
void Map::checkForPause() {
std::unique_lock<std::mutex> lockRun (mutexRun);
while (pausing) {
view.deactivate();
mutexPause.lock();
isPaused = true;
condPause.notify_all();
mutexPause.unlock();
condRun.wait(lockRun);
view.activate();
}
mutexPause.lock();
isPaused = false;
mutexPause.unlock();
}
void Map::terminate() {
assert(painter);
painter->terminate();
view.deactivate();
}
#pragma mark - Setup
void Map::setup() {
assert(std::this_thread::get_id() == mapThread);
assert(painter);
painter->setup();
}
void Map::setStyleURL(const std::string &url) {
// TODO: Make threadsafe.
styleURL = url;
if (mode == Mode::Continuous) {
stop();
start();
}
}
void Map::setStyleJSON(std::string newStyleJSON, const std::string &base) {
// TODO: Make threadsafe.
styleJSON.swap(newStyleJSON);
if (!style) {
style = std::make_shared<Style>(*env);
}
style->base = base;
style->loadJSON((const uint8_t *)styleJSON.c_str());
style->cascadeClasses(classes);
style->setDefaultTransitionDuration(defaultTransitionDuration);
triggerUpdate();
}
std::string Map::getStyleJSON() const {
return styleJSON;
}
#pragma mark - Size
void Map::resize(uint16_t width, uint16_t height, float ratio) {
resize(width, height, ratio, width * ratio, height * ratio);
}
void Map::resize(uint16_t width, uint16_t height, float ratio, uint16_t fbWidth, uint16_t fbHeight) {
if (transform.resize(width, height, ratio, fbWidth, fbHeight)) {
triggerUpdate();
}
}
#pragma mark - Transitions
void Map::cancelTransitions() {
transform.cancelTransitions();
triggerUpdate();
}
#pragma mark - Position
void Map::moveBy(double dx, double dy, std::chrono::steady_clock::duration duration) {
transform.moveBy(dx, dy, duration);
triggerUpdate();
}
void Map::setLatLng(LatLng latLng, std::chrono::steady_clock::duration duration) {
transform.setLatLng(latLng, duration);
triggerUpdate();
}
LatLng Map::getLatLng() const {
return state.getLatLng();
}
void Map::startPanning() {
transform.startPanning();
triggerUpdate();
}
void Map::stopPanning() {
transform.stopPanning();
triggerUpdate();
}
void Map::resetPosition() {
transform.setAngle(0);
transform.setLatLng(LatLng(0, 0));
transform.setZoom(0);
triggerUpdate();
}
#pragma mark - Scale
void Map::scaleBy(double ds, double cx, double cy, std::chrono::steady_clock::duration duration) {
transform.scaleBy(ds, cx, cy, duration);
triggerUpdate();
}
void Map::setScale(double scale, double cx, double cy, std::chrono::steady_clock::duration duration) {
transform.setScale(scale, cx, cy, duration);
triggerUpdate();
}
double Map::getScale() const {
return transform.getScale();
}
void Map::setZoom(double zoom, std::chrono::steady_clock::duration duration) {
transform.setZoom(zoom, duration);
triggerUpdate();
}
double Map::getZoom() const {
return transform.getZoom();
}
void Map::setLatLngZoom(LatLng latLng, double zoom, std::chrono::steady_clock::duration duration) {
transform.setLatLngZoom(latLng, zoom, duration);
triggerUpdate();
}
void Map::resetZoom() {
setZoom(0);
}
void Map::startScaling() {
transform.startScaling();
triggerUpdate();
}
void Map::stopScaling() {
transform.stopScaling();
triggerUpdate();
}
double Map::getMinZoom() const {
return transform.getMinZoom();
}
double Map::getMaxZoom() const {
return transform.getMaxZoom();
}
#pragma mark - Rotation
void Map::rotateBy(double sx, double sy, double ex, double ey, std::chrono::steady_clock::duration duration) {
transform.rotateBy(sx, sy, ex, ey, duration);
triggerUpdate();
}
void Map::setBearing(double degrees, std::chrono::steady_clock::duration duration) {
transform.setAngle(-degrees * M_PI / 180, duration);
triggerUpdate();
}
void Map::setBearing(double degrees, double cx, double cy) {
transform.setAngle(-degrees * M_PI / 180, cx, cy);
triggerUpdate();
}
double Map::getBearing() const {
return -transform.getAngle() / M_PI * 180;
}
void Map::resetNorth() {
transform.setAngle(0, std::chrono::milliseconds(500));
triggerUpdate();
}
void Map::startRotating() {
transform.startRotating();
triggerUpdate();
}
void Map::stopRotating() {
transform.stopRotating();
triggerUpdate();
}
#pragma mark - Access Token
void Map::setAccessToken(const std::string &token) {
accessToken = token;
}
const std::string &Map::getAccessToken() const {
return accessToken;
}
#pragma mark - Toggles
void Map::setDebug(bool value) {
debug = value;
assert(painter);
painter->setDebug(debug);
triggerUpdate();
}
void Map::toggleDebug() {
setDebug(!debug);
}
bool Map::getDebug() const {
return debug;
}
void Map::addClass(const std::string& klass) {
if (hasClass(klass)) return;
classes.push_back(klass);
if (style) {
style->cascadeClasses(classes);
if (style->hasTransitions()) {
triggerUpdate();
}
}
}
void Map::removeClass(const std::string& klass) {
if (!hasClass(klass)) return;
classes.erase(std::remove(classes.begin(), classes.end(), klass), classes.end());
if (style) {
style->cascadeClasses(classes);
if (style->hasTransitions()) {
triggerUpdate();
}
}
}
void Map::setClasses(const std::vector<std::string>& classes_) {
classes = classes_;
if (style) {
style->cascadeClasses(classes);
if (style->hasTransitions()) {
triggerUpdate();
}
}
}
bool Map::hasClass(const std::string& klass) const {
return std::find(classes.begin(), classes.end(), klass) != classes.end();
}
std::vector<std::string> Map::getClasses() const {
return classes;
}
void Map::setDefaultTransitionDuration(std::chrono::steady_clock::duration duration) {
defaultTransitionDuration = duration;
if (style) {
style->setDefaultTransitionDuration(duration);
}
}
std::chrono::steady_clock::duration Map::getDefaultTransitionDuration() {
return defaultTransitionDuration;
}
void Map::prepare() {
assert(std::this_thread::get_id() == mapThread);
if (!style) {
style = std::make_shared<Style>(*env);
env->request({ Resource::Kind::JSON, styleURL}, [&](const Response &res) {
if (res.status == Response::Successful) {
// Calculate the base
const size_t pos = styleURL.rfind('/');
std::string base = "";
if (pos != std::string::npos) {
base = styleURL.substr(0, pos + 1);
}
setStyleJSON(res.data, base);
} else {
Log::Error(Event::Setup, "loading style failed: %s", res.message.c_str());
}
});
}
// Update transform transitions.
animationTime = std::chrono::steady_clock::now();
if (transform.needsTransition()) {
transform.updateTransitions(animationTime);
}
state = transform.currentState();
animationTime = std::chrono::steady_clock::now();
style->updateSources(*this, *env, *workers, *texturePool, [this]() {
assert(std::this_thread::get_id() == mapThread);
triggerUpdate();
});
style->updateProperties(state.getNormalizedZoom(), animationTime);
if (mode == Mode::Continuous) {
view.invalidate();
}
}
void Map::render() {
assert(std::this_thread::get_id() == mapThread);
assert(painter);
painter->render(*style, style->activeSources,
state, animationTime);
// Schedule another rerender when we definitely need a next frame.
if (transform.needsTransition() || style->hasTransitions()) {
triggerUpdate();
}
}
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