1 files changed, 15 insertions, 0 deletions
diff --git a/src/mbgl/renderer/layers/render_fill_extrusion_layer.hpp b/src/mbgl/renderer/layers/render_fill_extrusion_layer.hpp
index f7ba13c267..1a721d035b 100644
--- a/src/mbgl/renderer/layers/render_fill_extrusion_layer.hpp
+++ b/src/mbgl/renderer/layers/render_fill_extrusion_layer.hpp
@@ -8,15 +8,25 @@
 
 namespace mbgl {
 
+template <class B>
+class PatternLayout;
+
+class FillExtrusionBucket;
+
 class RenderFillExtrusionLayer: public RenderLayer {
 public:
+    using StyleLayerImpl = style::FillExtrusionLayer::Impl;
+    using PatternProperty = style::FillExtrusionPattern;
+
     RenderFillExtrusionLayer(Immutable<style::FillExtrusionLayer::Impl>);
     ~RenderFillExtrusionLayer() final = default;
 
     void transition(const TransitionParameters&) override;
     void evaluate(const PropertyEvaluationParameters&) override;
     bool hasTransition() const override;
+    bool hasCrossfade() const override;
     void render(PaintParameters&, RenderSource*) override;
+    style::FillExtrusionPaintProperties::PossiblyEvaluated paintProperties() const;
 
     bool queryIntersectsFeature(
         const GeometryCoordinates&,
@@ -28,6 +38,9 @@ public:
 
     std::unique_ptr<Bucket> createBucket(const BucketParameters&, const std::vector<const RenderLayer*>&) const override;
 
+    std::unique_ptr<PatternLayout<FillExtrusionBucket>>
+    createLayout(const BucketParameters&, const std::vector<const RenderLayer*>&, std::unique_ptr<GeometryTileLayer>, ImageDependencies&) const;
+
     // Paint properties
     style::FillExtrusionPaintProperties::Unevaluated unevaluated;
     style::FillExtrusionPaintProperties::PossiblyEvaluated evaluated;
@@ -35,6 +48,8 @@ public:
     const style::FillExtrusionLayer::Impl& impl() const;
 
     optional<OffscreenTexture> renderTexture;
+private:
+    CrossfadeParameters crossfade;
 };
 
 template <>