[core] PlacedSymbolData includes viewport padding

include/mbgl/renderer/renderer.hpp

@@ -34,6 +34,8 @@ struct PlacedSymbolData {
     bool iconPlaced;
     // Symbol text or icon collision box intersects tile borders
     bool intersectsTileBorder;
+    // Viewport padding ({viewportPadding, viewportPadding} is a coordinate of the tile's top-left corner)
+    float viewportPadding;
 };
 
 class Renderer {
@@ -66,7 +68,9 @@ public:
     void setFeatureState(const std::string& sourceID, const optional<std::string>& sourceLayerID,
                          const std::string& featureID, const FeatureState& state);
 
-    void getFeatureState(FeatureState& state, const std::string& sourceID, const optional<std::string>& sourceLayerID,
+    void getFeatureState(FeatureState& state,
+                         const std::string& sourceID,
+                         const optional<std::string>& sourceLayerID,
                          const std::string& featureID) const;
 
     void removeFeatureState(const std::string& sourceID,

src/mbgl/text/collision_index.cpp

@@ -27,7 +27,7 @@ const float viewportPaddingDefault = 100;
 // Viewport padding must be much larger for static tiles to avoid clipped labels.
 const float viewportPaddingForStaticTiles = 1024;
 
-inline float getViewportPadding(const TransformState& transformState, MapMode mapMode) {
+inline float findViewportPadding(const TransformState& transformState, MapMode mapMode) {
     if (mapMode == MapMode::Tile) return viewportPaddingForStaticTiles;
     return (transformState.getPitch() != 0.0f) ? viewportPaddingDefault * 2 : viewportPaddingDefault;
 }
@@ -36,7 +36,7 @@ inline float getViewportPadding(const TransformState& transformState, MapMode ma
 
 CollisionIndex::CollisionIndex(const TransformState& transformState_, MapMode mapMode)
     : transformState(transformState_),
-      viewportPadding(getViewportPadding(transformState_, mapMode)),
+      viewportPadding(findViewportPadding(transformState_, mapMode)),
       collisionGrid(transformState.getSize().width + 2 * viewportPadding,
                     transformState.getSize().height + 2 * viewportPadding,
                     25),

src/mbgl/text/collision_index.hpp

@@ -50,6 +50,8 @@ public:
 
     const TransformState& getTransformState() const { return transformState; }
 
+    float getViewportPadding() const { return viewportPadding; }
+
 private:
     bool isOffscreen(const CollisionBoundaries&) const;
     bool isInsideGrid(const CollisionBoundaries&) const;

src/mbgl/text/placement.cpp

@@ -1386,7 +1386,8 @@ void TilePlacement::newSymbolPlaced(const SymbolInstance& symbol,
                                 iconCollisionBox,
                                 placement.text,
                                 placement.icon,
-                                !placement.skipFade && onlyLabelsIntersectingTileBorders};
+                                !placement.skipFade && onlyLabelsIntersectingTileBorders,
+                                collisionIndex.getViewportPadding()};
     placedSymbolsData.emplace_back(std::move(symbolData));
 }