[android] Add jni binding for styleable snapshotter

2 files changed, 25 insertions, 3 deletions

diff --git a/platform/android/src/snapshotter/map_snapshotter.cpp b/platform/android/src/snapshotter/map_snapshotter.cpp
index 852e1f6adb..c3172c1cbd 100644
--- a/platform/android/src/snapshotter/map_snapshotter.cpp
+++ b/platform/android/src/snapshotter/map_snapshotter.cpp
@@ -37,13 +37,12 @@ MapSnapshotter::MapSnapshotter(jni::JNIEnv& _env,
     auto size = mbgl::Size { static_cast<uint32_t>(width), static_cast<uint32_t>(height) };
 
     showLogo = _showLogo;
-
     // Create the core snapshotter
     snapshotter = std::make_unique<mbgl::MapSnapshotter>(
         size,
         pixelRatio,
         mbgl::android::FileSource::getSharedResourceOptions(_env, _jFileSource),
-        mbgl::MapSnapshotterObserver::nullObserver(),
+        observer,
         _localIdeographFontFamily ? jni::Make<std::string>(_env, _localIdeographFontFamily) : optional<std::string>{});
 
     if (position) {
@@ -126,6 +125,15 @@ void MapSnapshotter::setRegion(JNIEnv& env, const jni::Object<LatLngBounds>& reg
     snapshotter->setRegion(LatLngBounds::getLatLngBounds(env, region));
 }
 
+void MapSnapshotter::addLayer(JNIEnv &, jlong nativeLayerPtr) {
+    assert(nativeLayerPtr != 0);
+    Layer *layer = reinterpret_cast<Layer *>(nativeLayerPtr);
+    style::Layer &t = layer->get();
+    std::unique_ptr<style::Layer> u (&t);
+    observer.didFinishLoadingStyleCallback= [&] {
+        snapshotter->getStyle().addLayer(std::move(u));
+    };
+}
 
 // Private methods //
 
@@ -157,6 +165,7 @@ void MapSnapshotter::registerNative(jni::JNIEnv& env) {
                                            "nativeInitialize",
                                            "finalize",
                                             METHOD(&MapSnapshotter::setStyleUrl, "setStyleUrl"),
+                                            METHOD(&MapSnapshotter::addLayer, "nativeAddLayer"),
                                             METHOD(&MapSnapshotter::setStyleJson, "setStyleJson"),
                                             METHOD(&MapSnapshotter::setSize, "setSize"),
                                             METHOD(&MapSnapshotter::setCameraPosition, "setCameraPosition"),
diff --git a/platform/android/src/snapshotter/map_snapshotter.hpp b/platform/android/src/snapshotter/map_snapshotter.hpp
index 641a0e60f8..96214df090 100644
--- a/platform/android/src/snapshotter/map_snapshotter.hpp
+++ b/platform/android/src/snapshotter/map_snapshotter.hpp
@@ -6,6 +6,7 @@
 #include "../file_source.hpp"
 #include "../geometry/lat_lng_bounds.hpp"
 #include "../map/camera_position.hpp"
+#include "../style/layers/layer.hpp"
 
 #include <jni/jni.hpp>
 
@@ -13,6 +14,16 @@
 
 namespace mbgl {
 namespace android {
+    class SnapshotObserver final : public mbgl::MapSnapshotterObserver {
+    public:
+        ~SnapshotObserver() = default;
+        void onDidFinishLoadingStyle() override {
+            if (didFinishLoadingStyleCallback) {
+                didFinishLoadingStyleCallback();
+            }
+        }
+        std::function<void()> didFinishLoadingStyleCallback;
+    };
 
 class MapSnapshotter {
 public:
@@ -50,6 +61,8 @@ public:
 
     void cancel(JNIEnv&);
 
+    void addLayer(JNIEnv&, jlong);
+
 private:
     MBGL_STORE_THREAD(tid);
 
@@ -60,7 +73,7 @@ private:
     bool showLogo;
 
     std::unique_ptr<mbgl::MapSnapshotter> snapshotter;
-
+    SnapshotObserver observer;
     FileSource *jFileSource;
     void activateFilesource(JNIEnv&);
     void deactivateFilesource(JNIEnv&);