[core] LayerManager can disable annotations

At the moment, the annotations implementation in the `mapbox-gl-native`
core is creating concrete layer instances apart from `LayerManager/LayerFactory`
code path.

So, annotations must be disabled if the `LayerManager` implementation does
not provide line, fill or symbol layers (those, used by the annotations).

Note: in future, annotations implementation will be moved from the core to the
platform SDK level(see https://github.com/mapbox/mapbox-plugins-android/tree/master/plugin-annotation)
and `LayerManager` won't need to disable it.

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mbgl/renderer/renderer.cpp b/src/mbgl/renderer/renderer.cpp
index c7bd46106d..9976c1b6dc 100644
--- a/src/mbgl/renderer/renderer.cpp
+++ b/src/mbgl/renderer/renderer.cpp
@@ -55,6 +55,9 @@ std::vector<Feature> Renderer::queryRenderedFeatures(const ScreenBox& box, const
 }
 
 AnnotationIDs Renderer::queryPointAnnotations(const ScreenBox& box) const {
+    if (!LayerManager::annotationsEnabled) {
+        return {};
+    }
     RenderedQueryOptions options;
     options.layerIDs = {{ AnnotationManager::PointLayerID }};
     auto features = queryRenderedFeatures(box, options);
@@ -62,6 +65,9 @@ AnnotationIDs Renderer::queryPointAnnotations(const ScreenBox& box) const {
 }
 
 AnnotationIDs Renderer::queryShapeAnnotations(const ScreenBox& box) const {
+    if (!LayerManager::annotationsEnabled) {
+        return {};
+    }
     auto features = impl->queryShapeAnnotations({
         box.min,
         {box.max.x, box.min.y},
@@ -73,6 +79,9 @@ AnnotationIDs Renderer::queryShapeAnnotations(const ScreenBox& box) const {
 }
     
 AnnotationIDs Renderer::getAnnotationIDs(const std::vector<Feature>& features) const {
+    if (!LayerManager::annotationsEnabled) {
+        return {};
+    }
     std::set<AnnotationID> set;
     for (auto &feature : features) {
         assert(feature.id.is<uint64_t>());