1 files changed, 53 insertions, 0 deletions
diff --git a/src/mbgl/text/placement_worker.hpp b/src/mbgl/text/placement_worker.hpp
new file mode 100644
index 0000000000..86bc16088e
--- /dev/null
+++ b/src/mbgl/text/placement_worker.hpp
@@ -0,0 +1,53 @@
+#pragma once
+
+#include <unordered_map>
+#include <mbgl/util/immutable.hpp>
+#include <mbgl/renderer/buckets/symbol_bucket.hpp>
+#include <mbgl/text/collision_index.hpp>
+
+namespace mbgl {
+
+class PlacementBucket {
+    public:
+        PlacementBucket(Immutable<SymbolBucket::Core>&, Immutable<std::vector<uint32_t>>& ids, const UnwrappedTileID&, const OverscaledTileID&);
+        Immutable<SymbolBucket::Core> symbolBucketCore;
+        Immutable<std::vector<uint32_t>> symbolCrossTileIDs;
+        UnwrappedTileID unwrappedTileID;
+        OverscaledTileID overscaledTileID;
+};
+
+class PlacementPair {
+    public:
+        PlacementPair(bool text_, bool icon_) : text(text_), icon(icon_) {}
+        bool text;
+        bool icon;
+};
+
+class PlacementResult {
+    public:
+        PlacementResult(const TransformState& state) : collisionIndex(state) {}
+        CollisionIndex collisionIndex;
+        std::unordered_map<uint32_t,PlacementPair> placements;
+};
+
+class PlacementWorker {
+    public:
+        PlacementWorker(const TransformState&, const mat4& projMatrix, const bool showCollisionBoxes);
+        Immutable<PlacementResult> place(Immutable<std::vector<std::vector<PlacementBucket>>> placementBucketLayers);
+
+    private:
+        TransformState state;
+        const mat4 projMatrix;
+        const bool showCollisionBoxes;
+
+        void placeLayerBucket(
+                std::unordered_map<uint32_t,PlacementPair>& placements,
+                CollisionIndex& collisionIndex,
+                const SymbolBucket::Core&,
+                const std::vector<uint32_t>& symbolCrossTileIDs,
+                const UnwrappedTileID&,
+                const OverscaledTileID&,
+                std::unordered_set<uint32_t>& seenCrossTileIDs);
+};
+
+} // namespace mbgl