11 files changed, 530 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_source.cpp b/src/mbgl/renderer/render_source.cpp
index 7723a1c7ca..6624bb7d96 100644
--- a/src/mbgl/renderer/render_source.cpp
+++ b/src/mbgl/renderer/render_source.cpp
@@ -6,6 +6,7 @@
 #include <mbgl/renderer/tile_parameters.hpp>
 #include <mbgl/annotation/render_annotation_source.hpp>
 #include <mbgl/renderer/sources/render_image_source.hpp>
+#include <mbgl/renderer/sources/render_custom_geometry_source.hpp>
 #include <mbgl/tile/tile.hpp>
 
 namespace mbgl {
@@ -27,6 +28,8 @@ std::unique_ptr<RenderSource> RenderSource::create(Immutable<Source::Impl> impl)
         return std::make_unique<RenderAnnotationSource>(staticImmutableCast<AnnotationSource::Impl>(impl));
     case SourceType::Image:
         return std::make_unique<RenderImageSource>(staticImmutableCast<ImageSource::Impl>(impl));
+    case SourceType::CustomVector:
+        return std::make_unique<RenderCustomGeometrySource>(staticImmutableCast<CustomGeometrySource::Impl>(impl));
     }
 
     // Not reachable, but placate GCC.
diff --git a/src/mbgl/renderer/sources/render_custom_geometry_source.cpp b/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
new file mode 100644
index 0000000000..111f0234ed
--- /dev/null
+++ b/src/mbgl/renderer/sources/render_custom_geometry_source.cpp
@@ -0,0 +1,86 @@
+#include <mbgl/renderer/sources/render_custom_geometry_source.hpp>
+#include <mbgl/renderer/render_tile.hpp>
+#include <mbgl/renderer/paint_parameters.hpp>
+#include <mbgl/tile/custom_geometry_tile.hpp>
+
+#include <mbgl/algorithm/generate_clip_ids.hpp>
+#include <mbgl/algorithm/generate_clip_ids_impl.hpp>
+
+namespace mbgl {
+
+using namespace style;
+
+RenderCustomGeometrySource::RenderCustomGeometrySource(Immutable<style::CustomGeometrySource::Impl> impl_)
+    : RenderSource(impl_) {
+    tilePyramid.setObserver(this);
+}
+
+const style::CustomGeometrySource::Impl& RenderCustomGeometrySource::impl() const {
+    return static_cast<const style::CustomGeometrySource::Impl&>(*baseImpl);
+}
+
+bool RenderCustomGeometrySource::isLoaded() const {
+    return tilePyramid.isLoaded();
+}
+
+void RenderCustomGeometrySource::update(Immutable<style::Source::Impl> baseImpl_,
+                                 const std::vector<Immutable<Layer::Impl>>& layers,
+                                 const bool needsRendering,
+                                 const bool needsRelayout,
+                                 const TileParameters& parameters) {
+    std::swap(baseImpl, baseImpl_);
+
+    enabled = needsRendering;
+
+    auto tileLoader = impl().getTileLoader();
+    if (!tileLoader) {
+        return;
+    }
+
+    tilePyramid.update(layers,
+                       needsRendering,
+                       needsRelayout,
+                       parameters,
+                       SourceType::CustomVector,
+                       util::tileSize,
+                       impl().getZoomRange(),
+                       [&] (const OverscaledTileID& tileID) {
+                           return std::make_unique<CustomGeometryTile>(tileID, impl().id, parameters, impl().getTileOptions(), *tileLoader);
+                       });
+}
+
+void RenderCustomGeometrySource::startRender(PaintParameters& parameters) {
+    parameters.clipIDGenerator.update(tilePyramid.getRenderTiles());
+    tilePyramid.startRender(parameters);
+}
+
+void RenderCustomGeometrySource::finishRender(PaintParameters& parameters) {
+    tilePyramid.finishRender(parameters);
+}
+
+std::vector<std::reference_wrapper<RenderTile>> RenderCustomGeometrySource::getRenderTiles() {
+    return tilePyramid.getRenderTiles();
+}
+
+std::unordered_map<std::string, std::vector<Feature>>
+RenderCustomGeometrySource::queryRenderedFeatures(const ScreenLineString& geometry,
+                                           const TransformState& transformState,
+                                           const std::vector<const RenderLayer*>& layers,
+                                           const RenderedQueryOptions& options,
+                                           const CollisionIndex& collisionIndex) const {
+   return tilePyramid.queryRenderedFeatures(geometry, transformState, layers, options, collisionIndex);
+}
+
+std::vector<Feature> RenderCustomGeometrySource::querySourceFeatures(const SourceQueryOptions& options) const {
+    return tilePyramid.querySourceFeatures(options);
+}
+
+void RenderCustomGeometrySource::onLowMemory() {
+    tilePyramid.onLowMemory();
+}
+
+void RenderCustomGeometrySource::dumpDebugLogs() const {
+    tilePyramid.dumpDebugLogs();
+}
+
+} // namespace mbgl
diff --git a/src/mbgl/renderer/sources/render_custom_geometry_source.hpp b/src/mbgl/renderer/sources/render_custom_geometry_source.hpp
new file mode 100644
index 0000000000..82e691d5c9
--- /dev/null
+++ b/src/mbgl/renderer/sources/render_custom_geometry_source.hpp
@@ -0,0 +1,50 @@
+#pragma once
+
+#include <mbgl/renderer/render_source.hpp>
+#include <mbgl/renderer/tile_pyramid.hpp>
+#include <mbgl/style/sources/custom_geometry_source_impl.hpp>
+
+namespace mbgl {
+
+class RenderCustomGeometrySource : public RenderSource {
+public:
+    RenderCustomGeometrySource(Immutable<style::CustomGeometrySource::Impl>);
+
+    bool isLoaded() const final;
+
+    void update(Immutable<style::Source::Impl>,
+                const std::vector<Immutable<style::Layer::Impl>>&,
+                bool needsRendering,
+                bool needsRelayout,
+                const TileParameters&) final;
+
+    void startRender(PaintParameters&) final;
+    void finishRender(PaintParameters&) final;
+
+    std::vector<std::reference_wrapper<RenderTile>> getRenderTiles() final;
+
+    std::unordered_map<std::string, std::vector<Feature>>
+    queryRenderedFeatures(const ScreenLineString& geometry,
+                          const TransformState& transformState,
+                          const std::vector<const RenderLayer*>& layers,
+                          const RenderedQueryOptions& options,
+                          const CollisionIndex& collisionIndex) const final;
+
+    std::vector<Feature>
+    querySourceFeatures(const SourceQueryOptions&) const final;
+
+    void onLowMemory() final;
+    void dumpDebugLogs() const final;
+    
+private:
+    const style::CustomGeometrySource::Impl& impl() const;
+
+    TilePyramid tilePyramid;
+};
+
+template <>
+inline bool RenderSource::is<RenderCustomGeometrySource>() const {
+    return baseImpl->type == style::SourceType::CustomVector;
+}
+
+} // namespace mbgl
diff --git a/src/mbgl/style/custom_tile_loader.cpp b/src/mbgl/style/custom_tile_loader.cpp
new file mode 100644
index 0000000000..2fc94c9d5a
--- /dev/null
+++ b/src/mbgl/style/custom_tile_loader.cpp
@@ -0,0 +1,114 @@
+#include <mbgl/style/custom_tile_loader.hpp>
+
+namespace mbgl {
+namespace style {
+
+CustomTileLoader::CustomTileLoader(const TileFunction& fetchTileFn, const TileFunction& cancelTileFn) {
+    fetchTileFunction = fetchTileFn;
+    cancelTileFunction = cancelTileFn;
+}
+
+void CustomTileLoader::fetchTile(const OverscaledTileID& tileID, ActorRef<SetTileDataFunction> callbackRef) {
+    std::lock_guard<std::mutex> lock(dataCacheMutex);
+    auto cachedTileData = dataCache.find(tileID.canonical);
+    if (cachedTileData != dataCache.end()) {
+        callbackRef.invoke(&SetTileDataFunction::operator(), *(cachedTileData->second));
+    }
+    auto tileCallbacks = tileCallbackMap.find(tileID.canonical);
+    if (tileCallbacks == tileCallbackMap.end()) {
+        auto tuple = std::make_tuple(tileID.overscaledZ, tileID.wrap, callbackRef);
+        tileCallbackMap.insert({ tileID.canonical, std::vector<OverscaledIDFunctionTuple>(1, tuple) });
+    } else {
+        for (auto iter = tileCallbacks->second.begin(); iter != tileCallbacks->second.end(); iter++) {
+            if (std::get<0>(*iter) == tileID.overscaledZ && std::get<1>(*iter) == tileID.wrap ) {
+                std::get<2>(*iter) = callbackRef;
+                return;
+            }
+        }
+        tileCallbacks->second.emplace_back(std::make_tuple(tileID.overscaledZ, tileID.wrap, callbackRef));
+    }
+    if (cachedTileData == dataCache.end()) {
+        invokeTileFetch(tileID.canonical);
+    }
+}
+
+void CustomTileLoader::cancelTile(const OverscaledTileID& tileID) {
+    if (tileCallbackMap.find(tileID.canonical) != tileCallbackMap.end()) {
+        invokeTileCancel(tileID.canonical);
+    }
+}
+
+void CustomTileLoader::removeTile(const OverscaledTileID& tileID) {
+    auto tileCallbacks = tileCallbackMap.find(tileID.canonical);
+    if (tileCallbacks == tileCallbackMap.end()) return;
+    for (auto iter = tileCallbacks->second.begin(); iter != tileCallbacks->second.end(); iter++) {
+        if (std::get<0>(*iter) == tileID.overscaledZ && std::get<1>(*iter) == tileID.wrap ) {
+            tileCallbacks->second.erase(iter);
+            invokeTileCancel(tileID.canonical);
+            break;
+        }
+    }
+    if (tileCallbacks->second.size() == 0) {
+        std::lock_guard<std::mutex> lock(dataCacheMutex);
+        tileCallbackMap.erase(tileCallbacks);
+        dataCache.erase(tileID.canonical);
+    }
+}
+
+void CustomTileLoader::setTileData(const CanonicalTileID& tileID, const GeoJSON& data) {
+    std::lock_guard<std::mutex> lock(dataCacheMutex);
+
+    auto iter = tileCallbackMap.find(tileID);
+    if (iter == tileCallbackMap.end()) return;
+    dataCache[tileID] = std::make_unique<mapbox::geojson::geojson>(std::move(data));;
+    for (auto tuple : iter->second) {
+        auto actor = std::get<2>(tuple);
+        actor.invoke(&SetTileDataFunction::operator(), data);
+    }
+}
+
+void CustomTileLoader::invalidateTile(const CanonicalTileID& tileID) {
+    auto tileCallbacks = tileCallbackMap.find(tileID);
+    if (tileCallbacks == tileCallbackMap.end()) { return; }
+    for (auto iter = tileCallbacks->second.begin(); iter != tileCallbacks->second.end(); iter++) {
+        auto actor = std::get<2>(*iter);
+        actor.invoke(&SetTileDataFunction::operator(), mapbox::geojson::feature_collection());
+        invokeTileCancel(tileID);
+    }
+    tileCallbackMap.erase(tileCallbacks);
+    {
+        std::lock_guard<std::mutex> lock(dataCacheMutex);
+        dataCache.erase(tileID);
+    }
+}
+
+void CustomTileLoader::invalidateRegion(const LatLngBounds& bounds, Range<uint8_t> ) {
+    for (auto idtuple= tileCallbackMap.begin(); idtuple != tileCallbackMap.end(); idtuple++) {
+        const LatLngBounds tileBounds(idtuple->first);
+        if (tileBounds.intersects(bounds) || bounds.contains(tileBounds) || tileBounds.contains(bounds)) {
+            for (auto iter = idtuple->second.begin(); iter != idtuple->second.end(); iter++) {
+                std::lock_guard<std::mutex> lock(dataCacheMutex);
+                auto actor = std::get<2>(*iter);
+                actor.invoke(&SetTileDataFunction::operator(), mapbox::geojson::feature_collection());
+                invokeTileCancel(idtuple->first);
+                dataCache.erase(idtuple->first);
+            }
+            idtuple->second.clear();
+        }
+    }
+}
+
+void CustomTileLoader::invokeTileFetch(const CanonicalTileID& tileID) {
+    if (fetchTileFunction != nullptr) {
+        fetchTileFunction(tileID);
+    }
+}
+
+void CustomTileLoader::invokeTileCancel(const CanonicalTileID& tileID) {
+    if (cancelTileFunction != nullptr) {
+        cancelTileFunction(tileID);
+    }
+}
+
+} // namespace style
+} // namespace mbgl
diff --git a/src/mbgl/style/custom_tile_loader.hpp b/src/mbgl/style/custom_tile_loader.hpp
new file mode 100644
index 0000000000..fa3173ffc0
--- /dev/null
+++ b/src/mbgl/style/custom_tile_loader.hpp
@@ -0,0 +1,47 @@
+#pragma once
+
+#include <mbgl/style/sources/custom_geometry_source.hpp>
+#include <mbgl/tile/tile_id.hpp>
+#include <mbgl/util/geo.hpp>
+#include <mbgl/util/geojson.hpp>
+#include <mbgl/actor/actor_ref.hpp>
+
+#include <map>
+#include <mutex>
+
+namespace mbgl {
+namespace style {
+
+using SetTileDataFunction = std::function<void(const GeoJSON&)>;
+
+class CustomTileLoader : private util::noncopyable {
+public:
+
+    using OverscaledIDFunctionTuple = std::tuple<uint8_t, int16_t, ActorRef<SetTileDataFunction>>;
+
+    CustomTileLoader(const TileFunction& fetchTileFn, const TileFunction& cancelTileFn);
+
+    void fetchTile(const OverscaledTileID& tileID, ActorRef<SetTileDataFunction> callbackRef);
+    void cancelTile(const OverscaledTileID& tileID);
+
+    void removeTile(const OverscaledTileID& tileID);
+    void setTileData(const CanonicalTileID& tileID, const GeoJSON& data);
+
+    void invalidateTile(const CanonicalTileID&);
+    void invalidateRegion(const LatLngBounds&, Range<uint8_t>);
+
+private:
+    void invokeTileFetch(const CanonicalTileID& tileID);
+    void invokeTileCancel(const CanonicalTileID& tileID);
+
+    TileFunction fetchTileFunction;
+    TileFunction cancelTileFunction;
+    std::unordered_map<CanonicalTileID, std::vector<OverscaledIDFunctionTuple>> tileCallbackMap;
+    // Keep around a cache of tile data to serve back for wrapped and over-zooomed tiles
+    std::map<CanonicalTileID, std::unique_ptr<GeoJSON>> dataCache;
+    std::mutex dataCacheMutex;
+
+};
+
+} // namespace style
+} // namespace mbgl
diff --git a/src/mbgl/style/sources/custom_geometry_source.cpp b/src/mbgl/style/sources/custom_geometry_source.cpp
new file mode 100644
index 0000000000..657573b1f4
--- /dev/null
+++ b/src/mbgl/style/sources/custom_geometry_source.cpp
@@ -0,0 +1,45 @@
+#include <mbgl/style/sources/custom_geometry_source.hpp>
+#include <mbgl/style/custom_tile_loader.hpp>
+#include <mbgl/style/sources/custom_geometry_source_impl.hpp>
+#include <mbgl/actor/scheduler.hpp>
+#include <mbgl/tile/tile_id.hpp>
+
+#include <tuple>
+#include <map>
+
+namespace mbgl {
+namespace style {
+
+CustomGeometrySource::CustomGeometrySource(std::string id,
+                                       const CustomGeometrySource::Options options)
+    : Source(makeMutable<CustomGeometrySource::Impl>(std::move(id), options)),
+    mailbox(std::make_shared<Mailbox>(*Scheduler::GetCurrent())),
+    loader(std::make_unique<CustomTileLoader>(options.fetchTileFunction, options.cancelTileFunction)) {
+}
+
+CustomGeometrySource::~CustomGeometrySource() = default;
+
+const CustomGeometrySource::Impl& CustomGeometrySource::impl() const {
+    return static_cast<const CustomGeometrySource::Impl&>(*baseImpl);
+}
+
+void CustomGeometrySource::loadDescription(FileSource&) {
+    baseImpl = makeMutable<CustomGeometrySource::Impl>(impl(), ActorRef<CustomTileLoader>(*loader, mailbox));
+    loaded = true;
+}
+
+void CustomGeometrySource::setTileData(const CanonicalTileID& tileID,
+                                     const GeoJSON& data) {
+    loader->setTileData(tileID, data);
+}
+
+void CustomGeometrySource::invalidateTile(const CanonicalTileID& tileID) {
+    loader->invalidateTile(tileID);
+}
+
+void CustomGeometrySource::invalidateRegion(const LatLngBounds& bounds) {
+    loader->invalidateRegion(bounds, impl().getZoomRange());
+}
+    
+} // namespace style
+} // namespace mbgl
diff --git a/src/mbgl/style/sources/custom_geometry_source_impl.cpp b/src/mbgl/style/sources/custom_geometry_source_impl.cpp
new file mode 100644
index 0000000000..67d52bdc24
--- /dev/null
+++ b/src/mbgl/style/sources/custom_geometry_source_impl.cpp
@@ -0,0 +1,40 @@
+#include <mbgl/style/sources/custom_geometry_source_impl.hpp>
+#include <mbgl/style/source_observer.hpp>
+
+namespace mbgl {
+namespace style {
+
+CustomGeometrySource::Impl::Impl(std::string id_,
+                               const CustomGeometrySource::Options options)
+    : Source::Impl(SourceType::CustomVector, std::move(id_)),
+      tileOptions(options.tileOptions),
+      zoomRange(options.zoomRange),
+      loaderRef({}) {
+}
+
+CustomGeometrySource::Impl::Impl(const Impl& impl, ActorRef<CustomTileLoader> loaderRef_)
+    : Source::Impl(impl),
+    tileOptions(impl.tileOptions),
+    zoomRange(impl.zoomRange),
+    loaderRef(loaderRef_){
+    
+}
+
+optional<std::string> CustomGeometrySource::Impl::getAttribution() const {
+    return {};
+}
+
+CustomGeometrySource::TileOptions CustomGeometrySource::Impl::getTileOptions() const {
+    return tileOptions;
+}
+
+Range<uint8_t> CustomGeometrySource::Impl::getZoomRange() const {
+    return zoomRange;
+}
+
+optional<ActorRef<CustomTileLoader>> CustomGeometrySource::Impl::getTileLoader() const {
+    return loaderRef;
+}
+
+} // namespace style
+} // namespace mbgl
diff --git a/src/mbgl/style/sources/custom_geometry_source_impl.hpp b/src/mbgl/style/sources/custom_geometry_source_impl.hpp
new file mode 100644
index 0000000000..ce7187202d
--- /dev/null
+++ b/src/mbgl/style/sources/custom_geometry_source_impl.hpp
@@ -0,0 +1,29 @@
+#pragma once
+
+#include <mbgl/style/source_impl.hpp>
+#include <mbgl/style/sources/custom_geometry_source.hpp>
+#include <mbgl/style/custom_tile_loader.hpp>
+#include <mbgl/actor/actor_ref.hpp>
+
+namespace mbgl {
+namespace style {
+
+class CustomGeometrySource::Impl : public Source::Impl {
+public:
+    Impl(std::string id, CustomGeometrySource::Options options);
+    Impl(const Impl&, ActorRef<CustomTileLoader>);
+
+    optional<std::string> getAttribution() const final;
+
+    CustomGeometrySource::TileOptions getTileOptions() const;
+    Range<uint8_t> getZoomRange() const;
+    optional<ActorRef<CustomTileLoader>> getTileLoader() const;
+
+private:
+    CustomGeometrySource::TileOptions tileOptions;
+    Range<uint8_t> zoomRange;
+    optional<ActorRef<CustomTileLoader>> loaderRef;
+};
+
+} // namespace style
+} // namespace mbgl
diff --git a/src/mbgl/style/types.cpp b/src/mbgl/style/types.cpp
index 0a1781e01b..cd5e597fc0 100644
--- a/src/mbgl/style/types.cpp
+++ b/src/mbgl/style/types.cpp
@@ -12,6 +12,7 @@ MBGL_DEFINE_ENUM(SourceType, {
     { SourceType::Video, "video" },
     { SourceType::Annotations, "annotations" },
     { SourceType::Image, "image" },
+    { SourceType::CustomVector, "customvector" }
 });
 
 MBGL_DEFINE_ENUM(VisibilityType, {
diff --git a/src/mbgl/tile/custom_geometry_tile.cpp b/src/mbgl/tile/custom_geometry_tile.cpp
new file mode 100644
index 0000000000..0d0ff5be61
--- /dev/null
+++ b/src/mbgl/tile/custom_geometry_tile.cpp
@@ -0,0 +1,81 @@
+#include <mbgl/tile/custom_geometry_tile.hpp>
+#include <mbgl/tile/geojson_tile_data.hpp>
+#include <mbgl/renderer/query.hpp>
+#include <mbgl/renderer/tile_parameters.hpp>
+#include <mbgl/actor/scheduler.hpp>
+#include <mbgl/style/filter_evaluator.hpp>
+
+#include <mapbox/geojsonvt.hpp>
+
+namespace mbgl {
+
+CustomGeometryTile::CustomGeometryTile(const OverscaledTileID& overscaledTileID,
+                         std::string sourceID_,
+                         const TileParameters& parameters,
+                         const style::CustomGeometrySource::TileOptions options_,
+                         ActorRef<style::CustomTileLoader> loader_)
+    : GeometryTile(overscaledTileID, sourceID_, parameters),
+    necessity(TileNecessity::Optional),
+    options(options_),
+    loader(loader_),
+    actor(*Scheduler::GetCurrent(), std::bind(&CustomGeometryTile::setTileData, this, std::placeholders::_1)) {
+}
+
+CustomGeometryTile::~CustomGeometryTile() {
+    loader.invoke(&style::CustomTileLoader::removeTile, id);
+}
+
+void CustomGeometryTile::setTileData(const GeoJSON& geoJSON) {
+
+    auto featureData = mapbox::geometry::feature_collection<int16_t>();
+    if (geoJSON.is<FeatureCollection>() && !geoJSON.get<FeatureCollection>().empty()) {
+        const double scale = util::EXTENT / options.tileSize;
+
+        mapbox::geojsonvt::TileOptions vtOptions;
+        vtOptions.extent = util::EXTENT;
+        vtOptions.buffer = std::round(scale * options.buffer);
+        vtOptions.tolerance = scale * options.tolerance;
+        featureData = mapbox::geojsonvt::geoJSONToTile(geoJSON, id.canonical.z, id.canonical.x, id.canonical.y, vtOptions).features;
+    } else {
+        setNecessity(TileNecessity::Optional);
+    }
+    setData(std::make_unique<GeoJSONTileData>(std::move(featureData)));
+}
+
+//Fetching tile data for custom sources is assumed to be an expensive operation.
+// Only required tiles make fetchTile requests. Attempt to cancel a tile
+// that is no longer required.
+void CustomGeometryTile::setNecessity(TileNecessity newNecessity) {
+   if (newNecessity != necessity) {
+        necessity = newNecessity;
+        if (necessity == TileNecessity::Required) {
+            loader.invoke(&style::CustomTileLoader::fetchTile, id, actor.self());
+        } else if (!isRenderable()) {
+            loader.invoke(&style::CustomTileLoader::cancelTile, id);
+        }
+    }
+}
+
+void CustomGeometryTile::querySourceFeatures(
+    std::vector<Feature>& result,
+    const SourceQueryOptions& queryOptions) {
+
+    // Ignore the sourceLayer, there is only one
+    auto layer = getData()->getLayer({});
+
+    if (layer) {
+        auto featureCount = layer->featureCount();
+        for (std::size_t i = 0; i < featureCount; i++) {
+            auto feature = layer->getFeature(i);
+            
+            // Apply filter, if any
+            if (queryOptions.filter && !(*queryOptions.filter)(*feature)) {
+                continue;
+            }
+
+            result.push_back(convertFeature(*feature, id.canonical));
+        }
+    }
+}
+
+} // namespace mbgl
diff --git a/src/mbgl/tile/custom_geometry_tile.hpp b/src/mbgl/tile/custom_geometry_tile.hpp
new file mode 100644
index 0000000000..66cc412e8c
--- /dev/null
+++ b/src/mbgl/tile/custom_geometry_tile.hpp
@@ -0,0 +1,34 @@
+#pragma once
+
+#include <mbgl/tile/geometry_tile.hpp>
+#include <mbgl/util/feature.hpp>
+#include <mbgl/style/custom_tile_loader.hpp>
+
+namespace mbgl {
+
+class TileParameters;
+
+class CustomGeometryTile: public GeometryTile {
+public:
+    CustomGeometryTile(const OverscaledTileID&,
+               std::string sourceID,
+               const TileParameters&,
+               const style::CustomGeometrySource::TileOptions,
+               ActorRef<style::CustomTileLoader> loader);
+    ~CustomGeometryTile() override;
+    void setTileData(const GeoJSON& data);
+
+    void setNecessity(TileNecessity) final;
+
+    void querySourceFeatures(
+        std::vector<Feature>& result,
+        const SourceQueryOptions&) override;
+
+private:
+    TileNecessity necessity;
+    const style::CustomGeometrySource::TileOptions options;
+    ActorRef<style::CustomTileLoader> loader;
+    Actor<style::SetTileDataFunction> actor;
+};
+
+} // namespace mbgl