694 lines
21 KiB
C++
694 lines
21 KiB
C++
#include <mbgl/style/style.hpp>
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#include <mbgl/style/observer.hpp>
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#include <mbgl/style/source_impl.hpp>
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#include <mbgl/style/layers/symbol_layer.hpp>
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#include <mbgl/style/layers/symbol_layer_impl.hpp>
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#include <mbgl/style/layers/custom_layer.hpp>
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#include <mbgl/style/layers/custom_layer_impl.hpp>
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#include <mbgl/style/layers/background_layer.hpp>
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#include <mbgl/style/layers/background_layer_impl.hpp>
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#include <mbgl/style/layers/fill_layer.hpp>
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#include <mbgl/style/layers/fill_extrusion_layer.hpp>
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#include <mbgl/style/layers/line_layer.hpp>
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#include <mbgl/style/layers/circle_layer.hpp>
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#include <mbgl/style/layers/raster_layer.hpp>
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#include <mbgl/style/layer_impl.hpp>
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#include <mbgl/style/parser.hpp>
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#include <mbgl/style/transition_options.hpp>
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#include <mbgl/style/class_dictionary.hpp>
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#include <mbgl/style/update_parameters.hpp>
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#include <mbgl/style/cascade_parameters.hpp>
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#include <mbgl/style/property_evaluation_parameters.hpp>
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#include <mbgl/sprite/sprite_atlas.hpp>
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#include <mbgl/text/glyph_atlas.hpp>
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#include <mbgl/geometry/line_atlas.hpp>
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#include <mbgl/renderer/render_item.hpp>
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#include <mbgl/renderer/render_tile.hpp>
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#include <mbgl/util/constants.hpp>
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#include <mbgl/util/geometry.hpp>
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#include <mbgl/util/string.hpp>
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#include <mbgl/util/logging.hpp>
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#include <mbgl/util/math.hpp>
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#include <mbgl/math/minmax.hpp>
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#include <mbgl/map/query.hpp>
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#include <algorithm>
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namespace mbgl {
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namespace style {
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static Observer nullObserver;
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Style::Style(FileSource& fileSource_, float pixelRatio)
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: fileSource(fileSource_),
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glyphAtlas(std::make_unique<GlyphAtlas>(Size{ 2048, 2048 }, fileSource)),
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spriteAtlas(std::make_unique<SpriteAtlas>(Size{ 1024, 1024 }, pixelRatio)),
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lineAtlas(std::make_unique<LineAtlas>(Size{ 256, 512 })),
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observer(&nullObserver) {
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glyphAtlas->setObserver(this);
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spriteAtlas->setObserver(this);
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}
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Style::~Style() {
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for (const auto& source : sources) {
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source->baseImpl->setObserver(nullptr);
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}
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for (const auto& layer : layers) {
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if (CustomLayer* customLayer = layer->as<CustomLayer>()) {
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customLayer->impl->deinitialize();
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}
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}
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glyphAtlas->setObserver(nullptr);
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spriteAtlas->setObserver(nullptr);
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}
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bool Style::addClass(const std::string& className) {
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if (hasClass(className)) return false;
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classes.push_back(className);
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return true;
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}
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bool Style::hasClass(const std::string& className) const {
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return std::find(classes.begin(), classes.end(), className) != classes.end();
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}
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bool Style::removeClass(const std::string& className) {
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const auto it = std::find(classes.begin(), classes.end(), className);
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if (it != classes.end()) {
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classes.erase(it);
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return true;
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}
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return false;
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}
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void Style::setClasses(const std::vector<std::string>& classNames) {
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classes = classNames;
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}
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std::vector<std::string> Style::getClasses() const {
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return classes;
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}
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void Style::setTransitionOptions(const TransitionOptions& options) {
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transitionOptions = options;
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}
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TransitionOptions Style::getTransitionOptions() const {
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return transitionOptions;
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}
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void Style::setJSON(const std::string& json) {
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sources.clear();
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layers.clear();
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classes.clear();
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transitionOptions = {};
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updateBatch = {};
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Parser parser;
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auto error = parser.parse(json);
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if (error) {
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Log::Error(Event::ParseStyle, "Failed to parse style: %s", util::toString(error).c_str());
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observer->onStyleError();
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observer->onResourceError(error);
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return;
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}
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for (auto& source : parser.sources) {
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addSource(std::move(source));
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}
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for (auto& layer : parser.layers) {
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addLayer(std::move(layer));
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}
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name = parser.name;
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defaultLatLng = parser.latLng;
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defaultZoom = parser.zoom;
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defaultBearing = parser.bearing;
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defaultPitch = parser.pitch;
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glyphAtlas->setURL(parser.glyphURL);
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spriteAtlas->load(parser.spriteURL, fileSource);
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loaded = true;
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observer->onStyleLoaded();
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}
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void Style::addSource(std::unique_ptr<Source> source) {
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// Guard against duplicate source ids
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auto it = std::find_if(sources.begin(), sources.end(), [&](const auto& existing) {
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return existing->getID() == source->getID();
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});
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if (it != sources.end()) {
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std::string msg = "Source " + source->getID() + " already exists";
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throw std::runtime_error(msg.c_str());
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}
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source->baseImpl->setObserver(this);
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sources.emplace_back(std::move(source));
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}
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std::unique_ptr<Source> Style::removeSource(const std::string& id) {
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auto it = std::find_if(sources.begin(), sources.end(), [&](const auto& source) {
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return source->getID() == id;
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});
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if (it == sources.end()) {
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return nullptr;
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}
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auto source = std::move(*it);
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sources.erase(it);
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updateBatch.sourceIDs.erase(id);
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source->baseImpl->detach();
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return source;
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}
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std::vector<const Layer*> Style::getLayers() const {
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std::vector<const Layer*> result;
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result.reserve(layers.size());
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for (const auto& layer : layers) {
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result.push_back(layer.get());
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}
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return result;
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}
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std::vector<Layer*> Style::getLayers() {
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std::vector<Layer*> result;
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result.reserve(layers.size());
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for (auto& layer : layers) {
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result.push_back(layer.get());
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}
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return result;
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}
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std::vector<std::unique_ptr<Layer>>::const_iterator Style::findLayer(const std::string& id) const {
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return std::find_if(layers.begin(), layers.end(), [&](const auto& layer) {
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return layer->baseImpl->id == id;
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});
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}
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Layer* Style::getLayer(const std::string& id) const {
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auto it = findLayer(id);
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return it != layers.end() ? it->get() : nullptr;
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}
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Layer* Style::addLayer(std::unique_ptr<Layer> layer, optional<std::string> before) {
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// TODO: verify source
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// Guard against duplicate layer ids
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auto it = std::find_if(layers.begin(), layers.end(), [&](const auto& existing) {
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return existing->getID() == layer->getID();
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});
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if (it != layers.end()) {
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throw std::runtime_error(std::string{"Layer "} + layer->getID() + " already exists");
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}
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if (SymbolLayer* symbolLayer = layer->as<SymbolLayer>()) {
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if (!symbolLayer->impl->spriteAtlas) {
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symbolLayer->impl->spriteAtlas = spriteAtlas.get();
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}
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}
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if (CustomLayer* customLayer = layer->as<CustomLayer>()) {
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customLayer->impl->initialize();
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}
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layer->baseImpl->setObserver(this);
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return layers.emplace(before ? findLayer(*before) : layers.end(), std::move(layer))->get();
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}
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std::unique_ptr<Layer> Style::removeLayer(const std::string& id) {
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auto it = std::find_if(layers.begin(), layers.end(), [&](const auto& layer) {
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return layer->baseImpl->id == id;
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});
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if (it == layers.end())
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return nullptr;
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auto layer = std::move(*it);
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if (CustomLayer* customLayer = layer->as<CustomLayer>()) {
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customLayer->impl->deinitialize();
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}
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layers.erase(it);
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return layer;
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}
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std::string Style::getName() const {
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return name;
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}
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LatLng Style::getDefaultLatLng() const {
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return defaultLatLng;
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}
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double Style::getDefaultZoom() const {
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return defaultZoom;
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}
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double Style::getDefaultBearing() const {
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return defaultBearing;
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}
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double Style::getDefaultPitch() const {
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return defaultPitch;
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}
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void Style::updateTiles(const UpdateParameters& parameters) {
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for (const auto& source : sources) {
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if (source->baseImpl->enabled) {
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source->baseImpl->updateTiles(parameters);
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}
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}
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}
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void Style::updateSymbolDependentTiles() {
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for (const auto& source : sources) {
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source->baseImpl->updateSymbolDependentTiles();
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}
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}
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void Style::relayout() {
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for (const auto& sourceID : updateBatch.sourceIDs) {
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Source* source = getSource(sourceID);
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if (source && source->baseImpl->enabled) {
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source->baseImpl->reloadTiles();
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}
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}
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updateBatch.sourceIDs.clear();
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}
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void Style::cascade(const TimePoint& timePoint, MapMode mode) {
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// When in continuous mode, we can either have user- or style-defined
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// transitions. Still mode is always immediate.
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static const TransitionOptions immediateTransition {};
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std::vector<ClassID> classIDs;
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for (const auto& className : classes) {
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classIDs.push_back(ClassDictionary::Get().lookup(className));
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}
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classIDs.push_back(ClassID::Default);
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const CascadeParameters parameters {
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classIDs,
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mode == MapMode::Continuous ? timePoint : Clock::time_point::max(),
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mode == MapMode::Continuous ? transitionOptions : immediateTransition
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};
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for (const auto& layer : layers) {
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layer->baseImpl->cascade(parameters);
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}
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}
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void Style::recalculate(float z, const TimePoint& timePoint, MapMode mode) {
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// Disable all sources first. If we find an enabled layer that uses this source, we will
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// re-enable it later.
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for (const auto& source : sources) {
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source->baseImpl->enabled = false;
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}
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zoomHistory.update(z, timePoint);
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const PropertyEvaluationParameters parameters {
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z,
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mode == MapMode::Continuous ? timePoint : Clock::time_point::max(),
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zoomHistory,
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mode == MapMode::Continuous ? util::DEFAULT_FADE_DURATION : Duration::zero()
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};
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hasPendingTransitions = false;
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for (const auto& layer : layers) {
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hasPendingTransitions |= layer->baseImpl->evaluate(parameters);
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// Disable this layer if it doesn't need to be rendered.
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const bool needsRendering = layer->baseImpl->needsRendering(zoomHistory.lastZoom);
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if (!needsRendering) {
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continue;
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}
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// If this layer has a source, make sure that it gets loaded.
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if (Source* source = getSource(layer->baseImpl->source)) {
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source->baseImpl->enabled = true;
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if (!source->baseImpl->loaded) {
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source->baseImpl->loadDescription(fileSource);
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}
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}
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}
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// Remove the existing tiles if we didn't end up re-enabling the source.
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for (const auto& source : sources) {
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if (!source->baseImpl->enabled) {
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source->baseImpl->removeTiles();
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}
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}
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}
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std::vector<const Source*> Style::getSources() const {
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std::vector<const Source*> result;
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result.reserve(sources.size());
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for (const auto& source : sources) {
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result.push_back(source.get());
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}
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return result;
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}
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std::vector<Source*> Style::getSources() {
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std::vector<Source*> result;
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result.reserve(sources.size());
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for (auto& source : sources) {
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result.push_back(source.get());
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}
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return result;
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}
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Source* Style::getSource(const std::string& id) const {
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const auto it = std::find_if(sources.begin(), sources.end(), [&](const auto& source) {
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return source->getID() == id;
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});
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return it != sources.end() ? it->get() : nullptr;
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}
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bool Style::hasTransitions() const {
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return hasPendingTransitions;
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}
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bool Style::isLoaded() const {
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if (!loaded) {
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return false;
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}
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for (const auto& source: sources) {
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if (source->baseImpl->enabled && !source->baseImpl->isLoaded()) {
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return false;
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}
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}
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if (!spriteAtlas->isLoaded()) {
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return false;
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}
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return true;
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}
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RenderData Style::getRenderData(MapDebugOptions debugOptions, float angle) const {
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RenderData result;
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for (const auto& source : sources) {
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if (source->baseImpl->enabled) {
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result.sources.insert(source.get());
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}
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}
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for (const auto& layer : layers) {
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if (!layer->baseImpl->needsRendering(zoomHistory.lastZoom)) {
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continue;
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}
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if (const BackgroundLayer* background = layer->as<BackgroundLayer>()) {
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if (debugOptions & MapDebugOptions::Overdraw) {
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// We want to skip glClear optimization in overdraw mode.
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result.order.emplace_back(*layer);
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continue;
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}
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const BackgroundPaintProperties::Evaluated& paint = background->impl->paint.evaluated;
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if (layer.get() == layers[0].get() && paint.get<BackgroundPattern>().from.empty()) {
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// This is a solid background. We can use glClear().
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result.backgroundColor = paint.get<BackgroundColor>() * paint.get<BackgroundOpacity>();
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} else {
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// This is a textured background, or not the bottommost layer. We need to render it with a quad.
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result.order.emplace_back(*layer);
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}
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continue;
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}
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if (layer->is<CustomLayer>()) {
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result.order.emplace_back(*layer);
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continue;
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}
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Source* source = getSource(layer->baseImpl->source);
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if (!source) {
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Log::Warning(Event::Render, "can't find source for layer '%s'", layer->baseImpl->id.c_str());
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continue;
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}
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auto& renderTiles = source->baseImpl->getRenderTiles();
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const bool symbolLayer = layer->is<SymbolLayer>();
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// Sort symbol tiles in opposite y position, so tiles with overlapping
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// symbols are drawn on top of each other, with lower symbols being
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// drawn on top of higher symbols.
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std::vector<std::reference_wrapper<RenderTile>> sortedTiles;
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std::transform(renderTiles.begin(), renderTiles.end(), std::back_inserter(sortedTiles),
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[](auto& pair) { return std::ref(pair.second); });
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if (symbolLayer) {
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std::sort(sortedTiles.begin(), sortedTiles.end(),
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[angle](const RenderTile& a, const RenderTile& b) {
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Point<float> pa(a.id.canonical.x, a.id.canonical.y);
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Point<float> pb(b.id.canonical.x, b.id.canonical.y);
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auto par = util::rotate(pa, angle);
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auto pbr = util::rotate(pb, angle);
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return std::tie(par.y, par.x) < std::tie(pbr.y, pbr.x);
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});
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}
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for (auto& tileRef : sortedTiles) {
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auto& tile = tileRef.get();
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if (!tile.tile.isRenderable()) {
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continue;
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}
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// We're not clipping symbol layers, so when we have both parents and children of symbol
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// layers, we drop all children in favor of their parent to avoid duplicate labels.
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// See https://github.com/mapbox/mapbox-gl-native/issues/2482
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if (symbolLayer) {
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bool skip = false;
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// Look back through the buckets we decided to render to find out whether there is
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// already a bucket from this layer that is a parent of this tile. Tiles are ordered
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// by zoom level when we obtain them from getTiles().
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for (auto it = result.order.rbegin(); it != result.order.rend() && (&it->layer == layer.get()); ++it) {
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if (tile.tile.id.isChildOf(it->tile->tile.id)) {
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skip = true;
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break;
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}
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}
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if (skip) {
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continue;
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}
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}
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auto bucket = tile.tile.getBucket(*layer);
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if (bucket) {
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result.order.emplace_back(*layer, &tile, bucket);
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tile.used = true;
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}
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}
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}
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return result;
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}
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std::vector<Feature> Style::queryRenderedFeatures(const ScreenLineString& geometry,
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const TransformState& transformState,
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const RenderedQueryOptions& options) const {
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std::unordered_set<std::string> sourceFilter;
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if (options.layerIDs) {
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for (const auto& layerID : *options.layerIDs) {
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auto layer = getLayer(layerID);
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if (layer) sourceFilter.emplace(layer->baseImpl->source);
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}
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}
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std::vector<Feature> result;
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std::unordered_map<std::string, std::vector<Feature>> resultsByLayer;
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for (const auto& source : sources) {
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if (!sourceFilter.empty() && sourceFilter.find(source->getID()) == sourceFilter.end()) {
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continue;
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}
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auto sourceResults = source->baseImpl->queryRenderedFeatures(geometry, transformState, options);
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std::move(sourceResults.begin(), sourceResults.end(), std::inserter(resultsByLayer, resultsByLayer.begin()));
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}
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if (resultsByLayer.empty()) {
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return result;
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}
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// Combine all results based on the style layer order.
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for (const auto& layer : layers) {
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if (!layer->baseImpl->needsRendering(zoomHistory.lastZoom)) {
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continue;
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}
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auto it = resultsByLayer.find(layer->baseImpl->id);
|
|
if (it != resultsByLayer.end()) {
|
|
std::move(it->second.begin(), it->second.end(), std::back_inserter(result));
|
|
}
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
float Style::getQueryRadius() const {
|
|
float additionalRadius = 0;
|
|
for (auto& layer : layers) {
|
|
if (!layer->baseImpl->needsRendering(zoomHistory.lastZoom)) {
|
|
continue;
|
|
}
|
|
additionalRadius = util::max(additionalRadius, layer->baseImpl->getQueryRadius());
|
|
}
|
|
return additionalRadius;
|
|
}
|
|
|
|
|
|
void Style::setSourceTileCacheSize(size_t size) {
|
|
for (const auto& source : sources) {
|
|
source->baseImpl->setCacheSize(size);
|
|
}
|
|
}
|
|
|
|
void Style::onLowMemory() {
|
|
for (const auto& source : sources) {
|
|
source->baseImpl->onLowMemory();
|
|
}
|
|
}
|
|
|
|
void Style::setObserver(style::Observer* observer_) {
|
|
observer = observer_;
|
|
}
|
|
|
|
void Style::onGlyphsLoaded(const FontStack& fontStack, const GlyphRange& glyphRange) {
|
|
observer->onGlyphsLoaded(fontStack, glyphRange);
|
|
updateSymbolDependentTiles();
|
|
}
|
|
|
|
void Style::onGlyphsError(const FontStack& fontStack, const GlyphRange& glyphRange, std::exception_ptr error) {
|
|
lastError = error;
|
|
Log::Error(Event::Style, "Failed to load glyph range %d-%d for font stack %s: %s",
|
|
glyphRange.first, glyphRange.second, fontStackToString(fontStack).c_str(), util::toString(error).c_str());
|
|
observer->onGlyphsError(fontStack, glyphRange, error);
|
|
observer->onResourceError(error);
|
|
}
|
|
|
|
void Style::onSourceLoaded(Source& source) {
|
|
observer->onSourceLoaded(source);
|
|
observer->onUpdate(Update::Repaint);
|
|
}
|
|
|
|
void Style::onSourceAttributionChanged(Source& source, const std::string& attribution) {
|
|
observer->onSourceAttributionChanged(source, attribution);
|
|
}
|
|
|
|
void Style::onSourceError(Source& source, std::exception_ptr error) {
|
|
lastError = error;
|
|
Log::Error(Event::Style, "Failed to load source %s: %s",
|
|
source.getID().c_str(), util::toString(error).c_str());
|
|
observer->onSourceError(source, error);
|
|
observer->onResourceError(error);
|
|
}
|
|
|
|
void Style::onSourceDescriptionChanged(Source& source) {
|
|
observer->onSourceDescriptionChanged(source);
|
|
if (!source.baseImpl->loaded) {
|
|
source.baseImpl->loadDescription(fileSource);
|
|
}
|
|
}
|
|
|
|
void Style::onTileChanged(Source& source, const OverscaledTileID& tileID) {
|
|
observer->onTileChanged(source, tileID);
|
|
observer->onUpdate(Update::Repaint);
|
|
}
|
|
|
|
void Style::onTileError(Source& source, const OverscaledTileID& tileID, std::exception_ptr error) {
|
|
lastError = error;
|
|
Log::Error(Event::Style, "Failed to load tile %s for source %s: %s",
|
|
util::toString(tileID).c_str(), source.getID().c_str(), util::toString(error).c_str());
|
|
observer->onTileError(source, tileID, error);
|
|
observer->onResourceError(error);
|
|
}
|
|
|
|
void Style::onSpriteLoaded() {
|
|
observer->onSpriteLoaded();
|
|
observer->onUpdate(Update::Repaint); // For *-pattern properties.
|
|
updateSymbolDependentTiles();
|
|
}
|
|
|
|
void Style::onSpriteError(std::exception_ptr error) {
|
|
lastError = error;
|
|
Log::Error(Event::Style, "Failed to load sprite: %s", util::toString(error).c_str());
|
|
observer->onSpriteError(error);
|
|
observer->onResourceError(error);
|
|
}
|
|
|
|
struct QueueSourceReloadVisitor {
|
|
UpdateBatch& updateBatch;
|
|
|
|
// No need to reload sources for these types; their visibility can change but
|
|
// they don't participate in layout.
|
|
void operator()(CustomLayer&) {}
|
|
void operator()(RasterLayer&) {}
|
|
void operator()(BackgroundLayer&) {}
|
|
|
|
template <class VectorLayer>
|
|
void operator()(VectorLayer& layer) {
|
|
updateBatch.sourceIDs.insert(layer.getSourceID());
|
|
}
|
|
};
|
|
|
|
void Style::onLayerFilterChanged(Layer& layer) {
|
|
layer.accept(QueueSourceReloadVisitor { updateBatch });
|
|
observer->onUpdate(Update::Layout);
|
|
}
|
|
|
|
void Style::onLayerVisibilityChanged(Layer& layer) {
|
|
layer.accept(QueueSourceReloadVisitor { updateBatch });
|
|
observer->onUpdate(Update::RecalculateStyle | Update::Layout);
|
|
}
|
|
|
|
void Style::onLayerPaintPropertyChanged(Layer&) {
|
|
observer->onUpdate(Update::RecalculateStyle | Update::Classes);
|
|
}
|
|
|
|
void Style::onLayerDataDrivenPaintPropertyChanged(Layer& layer) {
|
|
layer.accept(QueueSourceReloadVisitor { updateBatch });
|
|
observer->onUpdate(Update::RecalculateStyle | Update::Classes | Update::Layout);
|
|
}
|
|
|
|
void Style::onLayerLayoutPropertyChanged(Layer& layer, const char * property) {
|
|
layer.accept(QueueSourceReloadVisitor { updateBatch });
|
|
|
|
auto update = Update::Layout;
|
|
|
|
// Recalculate the style for certain properties
|
|
bool needsRecalculation = strcmp(property, "icon-size") == 0 || strcmp(property, "text-size") == 0;
|
|
if (needsRecalculation) {
|
|
update |= Update::RecalculateStyle;
|
|
}
|
|
observer->onUpdate(update);
|
|
}
|
|
|
|
void Style::dumpDebugLogs() const {
|
|
for (const auto& source : sources) {
|
|
source->baseImpl->dumpDebugLogs();
|
|
}
|
|
|
|
spriteAtlas->dumpDebugLogs();
|
|
}
|
|
|
|
} // namespace style
|
|
} // namespace mbgl
|