1 files changed, 22 insertions, 2 deletions
diff --git a/src/mbgl/util/tile_cover.hpp b/src/mbgl/util/tile_cover.hpp
index b2098b59b8..c953d764d2 100644
--- a/src/mbgl/util/tile_cover.hpp
+++ b/src/mbgl/util/tile_cover.hpp
@@ -2,9 +2,11 @@
 
 #include <mbgl/tile/tile_id.hpp>
 #include <mbgl/style/types.hpp>
-#include <mbgl/util/tile_coordinate.hpp>
+#include <mbgl/util/geometry.hpp>
+#include <mbgl/util/optional.hpp>
 
 #include <vector>
+#include <memory>
 
 namespace mbgl {
 
@@ -13,13 +15,31 @@ class LatLngBounds;
 
 namespace util {
 
+// Helper class to stream tile-cover results per row
+class TileCover {
+public:
+    TileCover(const LatLngBounds&, int32_t z);
+    // When project == true, projects the geometry points to tile coordinates
+    TileCover(const Geometry<double>&, int32_t z, bool project = true);
+    ~TileCover();
+
+    optional<UnwrappedTileID> next();
+    bool hasNext();
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl;
+};
+
 int32_t coveringZoomLevel(double z, style::SourceType type, uint16_t tileSize);
 
 std::vector<UnwrappedTileID> tileCover(const TransformState&, int32_t z);
 std::vector<UnwrappedTileID> tileCover(const LatLngBounds&, int32_t z);
+std::vector<UnwrappedTileID> tileCover(const Geometry<double>&, int32_t z);
 
 // Compute only the count of tiles needed for tileCover
-uint64_t tileCount(const LatLngBounds&, uint8_t z, uint16_t tileSize);
+uint64_t tileCount(const LatLngBounds&, uint8_t z);
+uint64_t tileCount(const Geometry<double>&, uint8_t z);
 
 } // namespace util
 } // namespace mbgl