[core] annotation manager - manage dirty state internally

src/mbgl/annotation/annotation_manager.cpp

@@ -39,19 +39,22 @@ AnnotationID AnnotationManager::addAnnotation(const Annotation& annotation, cons
     Annotation::visit(annotation, [&] (const auto& annotation_) {
         this->add(id, annotation_, maxZoom);
     });
+    dirty = true;
     return id;
 }
 
-Update AnnotationManager::updateAnnotation(const AnnotationID& id, const Annotation& annotation, const uint8_t maxZoom) {
+bool AnnotationManager::updateAnnotation(const AnnotationID& id, const Annotation& annotation, const uint8_t maxZoom) {
     std::lock_guard<std::mutex> lock(mutex);
-    return Annotation::visit(annotation, [&] (const auto& annotation_) {
-        return this->update(id, annotation_, maxZoom);
+    Annotation::visit(annotation, [&] (const auto& annotation_) {
+        this->update(id, annotation_, maxZoom);
     });
+    return dirty;
 }
 
 void AnnotationManager::removeAnnotation(const AnnotationID& id) {
     std::lock_guard<std::mutex> lock(mutex);
     remove(id);
+    dirty = true;
 }
 
 void AnnotationManager::add(const AnnotationID& id, const SymbolAnnotation& annotation, const uint8_t) {
@@ -72,49 +75,45 @@ void AnnotationManager::add(const AnnotationID& id, const FillAnnotation& annota
     impl.updateStyle(*style.get().impl);
 }
 
-Update AnnotationManager::update(const AnnotationID& id, const SymbolAnnotation& annotation, const uint8_t maxZoom) {
-    Update result = Update::Nothing;
-
+void AnnotationManager::update(const AnnotationID& id, const SymbolAnnotation& annotation, const uint8_t maxZoom) {
     auto it = symbolAnnotations.find(id);
     if (it == symbolAnnotations.end()) {
         assert(false); // Attempt to update a non-existent symbol annotation
-        return result;
+        return;
     }
 
     const SymbolAnnotation& existing = it->second->annotation;
 
     if (existing.geometry != annotation.geometry || existing.icon != annotation.icon) {
-        result |= Update::AnnotationData;
+        dirty = true;
 
         remove(id);
         add(id, annotation, maxZoom);
     }
-
-    return result;
 }
 
-Update AnnotationManager::update(const AnnotationID& id, const LineAnnotation& annotation, const uint8_t maxZoom) {
+void AnnotationManager::update(const AnnotationID& id, const LineAnnotation& annotation, const uint8_t maxZoom) {
     auto it = shapeAnnotations.find(id);
     if (it == shapeAnnotations.end()) {
         assert(false); // Attempt to update a non-existent shape annotation
-        return Update::Nothing;
+        return;
     }
 
     shapeAnnotations.erase(it);
     add(id, annotation, maxZoom);
-    return Update::AnnotationData;
+    dirty = true;
 }
 
-Update AnnotationManager::update(const AnnotationID& id, const FillAnnotation& annotation, const uint8_t maxZoom) {
+void AnnotationManager::update(const AnnotationID& id, const FillAnnotation& annotation, const uint8_t maxZoom) {
     auto it = shapeAnnotations.find(id);
     if (it == shapeAnnotations.end()) {
         assert(false); // Attempt to update a non-existent shape annotation
-        return Update::Nothing;
+        return;
     }
 
     shapeAnnotations.erase(it);
     add(id, annotation, maxZoom);
-    return Update::AnnotationData;
+    dirty = true;
 }
 
 void AnnotationManager::remove(const AnnotationID& id) {
@@ -187,8 +186,11 @@ void AnnotationManager::updateStyle() {
 
 void AnnotationManager::updateData() {
     std::lock_guard<std::mutex> lock(mutex);
-    for (auto& tile : tiles) {
-        tile->setData(getTileData(tile->id.canonical));
+    if (dirty) {
+        for (auto& tile : tiles) {
+            tile->setData(getTileData(tile->id.canonical));
+        }
+        dirty = false;
     }
 }
 

src/mbgl/annotation/annotation_manager.hpp

@@ -3,7 +3,6 @@
 #include <mbgl/annotation/annotation.hpp>
 #include <mbgl/annotation/symbol_annotation_impl.hpp>
 #include <mbgl/style/image.hpp>
-#include <mbgl/map/update.hpp>
 #include <mbgl/util/noncopyable.hpp>
 
 #include <mutex>
@@ -30,7 +29,7 @@ public:
     ~AnnotationManager();
 
     AnnotationID addAnnotation(const Annotation&, const uint8_t maxZoom);
-    Update updateAnnotation(const AnnotationID&, const Annotation&, const uint8_t maxZoom);
+    bool updateAnnotation(const AnnotationID&, const Annotation&, const uint8_t maxZoom);
     void removeAnnotation(const AnnotationID&);
 
     void addImage(std::unique_ptr<style::Image>);
@@ -53,9 +52,9 @@ private:
     void add(const AnnotationID&, const LineAnnotation&, const uint8_t);
     void add(const AnnotationID&, const FillAnnotation&, const uint8_t);
 
-    Update update(const AnnotationID&, const SymbolAnnotation&, const uint8_t);
-    Update update(const AnnotationID&, const LineAnnotation&, const uint8_t);
-    Update update(const AnnotationID&, const FillAnnotation&, const uint8_t);
+    void update(const AnnotationID&, const SymbolAnnotation&, const uint8_t);
+    void update(const AnnotationID&, const LineAnnotation&, const uint8_t);
+    void update(const AnnotationID&, const FillAnnotation&, const uint8_t);
 
     void remove(const AnnotationID&);
 
@@ -67,6 +66,8 @@ private:
 
     std::mutex mutex;
 
+    bool dirty = false;
+    
     AnnotationID nextID = 0;
 
     using SymbolAnnotationTree = boost::geometry::index::rtree<std::shared_ptr<const SymbolAnnotationImpl>, boost::geometry::index::rstar<16, 4>>;

src/mbgl/map/map.cpp

@@ -630,7 +630,9 @@ AnnotationID Map::addAnnotation(const Annotation& annotation) {
 }
 
 void Map::updateAnnotation(AnnotationID id, const Annotation& annotation) {
-    impl->onUpdate(impl->annotationManager.updateAnnotation(id, annotation, getMaxZoom()));
+    if (impl->annotationManager.updateAnnotation(id, annotation, getMaxZoom())) {
+        impl->onUpdate(Update::AnnotationData);
+    }
 }
 
 void Map::removeAnnotation(AnnotationID annotation) {