add onStyleImageMissing to allow dynamically loaded or generated images (#14253)

Also make `Style#updateImage(...)` much faster when the image doesn't change size. This can be useful for asynchronously generating images.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/mbgl/map/map_impl.cpp b/src/mbgl/map/map_impl.cpp
index 42561cf8bf..1ec7255822 100644
--- a/src/mbgl/map/map_impl.cpp
+++ b/src/mbgl/map/map_impl.cpp
@@ -171,4 +171,14 @@ void Map::Impl::jumpTo(const CameraOptions& camera) {
     onUpdate();
 }
 
+void Map::Impl::onStyleImageMissing(const std::string& id, std::function<void()> done) {
+
+    if (style->getImage(id) == nullptr) {
+        observer.onStyleImageMissing(id);
+    }
+
+    done();
+    onUpdate();
+}
+
 } // namespace mbgl