1 files changed, 81 insertions, 0 deletions
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