[core][Android][Darwin] LayerManager creates RenderLayer instances

`LayerManager` is now responsible for `RenderLayer` instances creation,
so that there is a single entry point for creating of objects, which
correspond to a certain layer type.

The `LayerType type` field is dropped from `Layer::Impl`.

31 files changed, 279 insertions, 203 deletions

diff --git a/src/mbgl/style/layer.cpp b/src/mbgl/style/layer.cpp
index 56b825760b..abe6444701 100644
--- a/src/mbgl/style/layer.cpp
+++ b/src/mbgl/style/layer.cpp
@@ -5,6 +5,8 @@
 #include <mbgl/style/conversion/filter.hpp>
 #include <mbgl/style/conversion_impl.hpp>
 
+#include <mbgl/renderer/render_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
@@ -17,10 +19,6 @@ Layer::Layer(Immutable<Impl> impl)
 
 Layer::~Layer() = default;
 
-LayerType Layer::getType() const {
-    return baseImpl->type;
-}
-
 std::string Layer::getID() const {
     return baseImpl->id;
 }
@@ -111,7 +109,9 @@ const LayerTypeInfo* Layer::getTypeInfo() const noexcept {
     return baseImpl->getTypeInfo();
 }
 
-optional<std::string> LayerFactory::getSource(const conversion::Convertible& value) const noexcept {
+} // namespace style
+
+optional<std::string> LayerFactory::getSource(const style::conversion::Convertible& value) const noexcept {
     auto sourceValue = objectMember(value, "source");
     if (!sourceValue) {
         return nullopt;
@@ -125,7 +125,7 @@ optional<std::string> LayerFactory::getSource(const conversion::Convertible& val
     return source;
 }
 
-bool LayerFactory::initSourceLayerAndFilter(Layer* layer, const conversion::Convertible& value) const noexcept {
+bool LayerFactory::initSourceLayerAndFilter(style::Layer* layer, const style::conversion::Convertible& value) const noexcept {
     auto sourceLayerValue = objectMember(value, "source-layer");
     if (sourceLayerValue) {
         optional<std::string> sourceLayer = toString(*sourceLayerValue);
@@ -137,8 +137,8 @@ bool LayerFactory::initSourceLayerAndFilter(Layer* layer, const conversion::Conv
 
     auto filterValue = objectMember(value, "filter");
     if (filterValue) {
-        conversion::Error error;
-        optional<Filter> filter = conversion::convert<Filter>(*filterValue, error);
+        style::conversion::Error error;
+        optional<style::Filter> filter = style::conversion::convert<style::Filter>(*filterValue, error);
         if (!filter) {
             return false;
         }
@@ -148,5 +148,25 @@ bool LayerFactory::initSourceLayerAndFilter(Layer* layer, const conversion::Conv
     return true;
 }
 
-} // namespace style
+std::unique_ptr<style::Layer> LayerManager::createLayer(
+    const std::string& type, const std::string& id,
+    const style::conversion::Convertible& value, style::conversion::Error& error) noexcept {
+    if (LayerFactory* factory = getFactory(type)) {
+        auto layer = factory->createLayer(id, value);
+        if (!layer) {
+            error.message = "Error parsing a layer of type: " + type;
+        }
+        return layer;
+    }
+    error.message = "Unsupported layer type: " + type;
+    return nullptr;
+}
+
+std::unique_ptr<RenderLayer> LayerManager::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    LayerFactory* factory = getFactory(impl->getTypeInfo());
+    assert(factory);
+    return factory->createRenderLayer(std::move(impl));
+}
+
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layer_impl.cpp b/src/mbgl/style/layer_impl.cpp
index c6a248de90..b6ab145012 100644
--- a/src/mbgl/style/layer_impl.cpp
+++ b/src/mbgl/style/layer_impl.cpp
@@ -3,9 +3,8 @@
 namespace mbgl {
 namespace style {
 
-Layer::Impl::Impl(LayerType type_, std::string layerID, std::string sourceID)
-    : type(type_),
-      id(std::move(layerID)),
+Layer::Impl::Impl(std::string layerID, std::string sourceID)
+    : id(std::move(layerID)),
       source(std::move(sourceID)) {
 }
 
diff --git a/src/mbgl/style/layer_impl.hpp b/src/mbgl/style/layer_impl.hpp
index 948bbab619..c64173600e 100644
--- a/src/mbgl/style/layer_impl.hpp
+++ b/src/mbgl/style/layer_impl.hpp
@@ -29,7 +29,7 @@ namespace style {
  */
 class Layer::Impl {
 public:
-    Impl(LayerType, std::string layerID, std::string sourceID);
+    Impl(std::string layerID, std::string sourceID);
     virtual ~Impl() = default;
 
     Impl& operator=(const Impl&) = delete;
@@ -47,8 +47,6 @@ public:
     // Populates the given \a fontStack with fonts being used by the layer.
     virtual void populateFontStack(std::set<FontStack>& fontStack) const;
 
-    // Note: LayerType is deprecated, do not use it.
-    const LayerType type;
     std::string id;
     std::string source;
     std::string sourceLayer;
@@ -61,5 +59,10 @@ protected:
     Impl(const Impl&) = default;
 };
 
+// To be used in the inherited classes.
+#define DECLARE_LAYER_TYPE_INFO \
+const LayerTypeInfo* getTypeInfo() const noexcept final { return staticTypeInfo(); } \
+static const LayerTypeInfo* staticTypeInfo() noexcept
+
 } // namespace style
-} // namespace mbgl
+} // namespace mbgl
\ No newline at end of file
diff --git a/src/mbgl/style/layers/background_layer.cpp b/src/mbgl/style/layers/background_layer.cpp
index 1342afd7b1..8beafb0278 100644
--- a/src/mbgl/style/layers/background_layer.cpp
+++ b/src/mbgl/style/layers/background_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_background_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoBackground
+
+// static
+const LayerTypeInfo* BackgroundLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"background",
           LayerTypeInfo::Source::NotRequired,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::NotRequired,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 BackgroundLayer::BackgroundLayer(const std::string& layerID)
-    : Layer(makeMutable<Impl>(LayerType::Background, layerID, std::string())) {
+    : Layer(makeMutable<Impl>(layerID, std::string())) {
 }
 
 BackgroundLayer::BackgroundLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> BackgroundLayer::cloneRef(const std::string& id_) const {
 void BackgroundLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* BackgroundLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoBackground;
-}
-
 // Layout properties
 
 
@@ -284,18 +286,20 @@ Mutable<Layer::Impl> BackgroundLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-BackgroundLayerFactory::BackgroundLayerFactory() = default;
-
-BackgroundLayerFactory::~BackgroundLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* BackgroundLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoBackground;
+const style::LayerTypeInfo* BackgroundLayerFactory::getTypeInfo() const noexcept {
+    return style::BackgroundLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> BackgroundLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> BackgroundLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     (void)value;
-    return std::unique_ptr<style::Layer>(new BackgroundLayer(id));
+    return std::unique_ptr<style::Layer>(new style::BackgroundLayer(id));
+}
+
+std::unique_ptr<RenderLayer> BackgroundLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderBackgroundLayer>(staticImmutableCast<style::BackgroundLayer::Impl>(std::move(impl)));
 }
 
-} // namespace style
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/background_layer_impl.hpp b/src/mbgl/style/layers/background_layer_impl.hpp
index 5407c4c065..0c68610c62 100644
--- a/src/mbgl/style/layers/background_layer_impl.hpp
+++ b/src/mbgl/style/layers/background_layer_impl.hpp
@@ -13,9 +13,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     BackgroundPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/circle_layer.cpp b/src/mbgl/style/layers/circle_layer.cpp
index c04d40083a..1e6200e4d2 100644
--- a/src/mbgl/style/layers/circle_layer.cpp
+++ b/src/mbgl/style/layers/circle_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_circle_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoCircle
+
+// static
+const LayerTypeInfo* CircleLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"circle",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::NotRequired,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 CircleLayer::CircleLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Circle, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 CircleLayer::CircleLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> CircleLayer::cloneRef(const std::string& id_) const {
 void CircleLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* CircleLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoCircle;
-}
-
 // Layout properties
 
 
@@ -701,26 +703,28 @@ Mutable<Layer::Impl> CircleLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-CircleLayerFactory::CircleLayerFactory() = default;
-
-CircleLayerFactory::~CircleLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* CircleLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoCircle;
+const style::LayerTypeInfo* CircleLayerFactory::getTypeInfo() const noexcept {
+    return style::CircleLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> CircleLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> CircleLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new CircleLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::CircleLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> CircleLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderCircleLayer>(staticImmutableCast<style::CircleLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/circle_layer_impl.cpp b/src/mbgl/style/layers/circle_layer_impl.cpp
index 358598e09c..bf0688ac8b 100644
--- a/src/mbgl/style/layers/circle_layer_impl.cpp
+++ b/src/mbgl/style/layers/circle_layer_impl.cpp
@@ -4,7 +4,7 @@ namespace mbgl {
 namespace style {
 
 bool CircleLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::Circle);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::CircleLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/circle_layer_impl.hpp b/src/mbgl/style/layers/circle_layer_impl.hpp
index 5cd56b630c..9b3ce48706 100644
--- a/src/mbgl/style/layers/circle_layer_impl.hpp
+++ b/src/mbgl/style/layers/circle_layer_impl.hpp
@@ -13,9 +13,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     CirclePaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/custom_layer.cpp b/src/mbgl/style/layers/custom_layer.cpp
index bff55a7a52..abea5d2d31 100644
--- a/src/mbgl/style/layers/custom_layer.cpp
+++ b/src/mbgl/style/layers/custom_layer.cpp
@@ -2,6 +2,8 @@
 #include <mbgl/style/layers/custom_layer_impl.hpp>
 #include <mbgl/style/layer_observer.hpp>
 
+#include <mbgl/renderer/layers/render_custom_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
@@ -48,22 +50,24 @@ Mutable<Layer::Impl> CustomLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-const LayerTypeInfo* CustomLayer::Impl::getTypeInfo() const noexcept {
+// static
+const LayerTypeInfo* CustomLayer::Impl::staticTypeInfo() noexcept {
     return &typeInfoCustom;
 }
 
-CustomLayerFactory::CustomLayerFactory() = default;
-
-CustomLayerFactory::~CustomLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* CustomLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoCustom;
+const style::LayerTypeInfo* CustomLayerFactory::getTypeInfo() const noexcept {
+    return &style::typeInfoCustom;
 }
 
-std::unique_ptr<style::Layer> CustomLayerFactory::createLayer(const std::string&, const conversion::Convertible&) {
+std::unique_ptr<style::Layer> CustomLayerFactory::createLayer(const std::string&, const style::conversion::Convertible&) noexcept {
     assert(false);
     return nullptr;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> CustomLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    return std::make_unique<RenderCustomLayer>(staticImmutableCast<style::CustomLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/custom_layer_impl.cpp b/src/mbgl/style/layers/custom_layer_impl.cpp
index 05c41623c4..f82cb1ea2c 100644
--- a/src/mbgl/style/layers/custom_layer_impl.cpp
+++ b/src/mbgl/style/layers/custom_layer_impl.cpp
@@ -5,7 +5,7 @@ namespace style {
 
 CustomLayer::Impl::Impl(const std::string& id_,
                         std::unique_ptr<CustomLayerHost> host_)
-    : Layer::Impl(LayerType::Custom, id_, std::string()) {
+    : Layer::Impl(id_, std::string()) {
     host = std::move(host_);
 }
 
diff --git a/src/mbgl/style/layers/custom_layer_impl.hpp b/src/mbgl/style/layers/custom_layer_impl.hpp
index 6c7a9078a5..1ebf1b53f1 100644
--- a/src/mbgl/style/layers/custom_layer_impl.hpp
+++ b/src/mbgl/style/layers/custom_layer_impl.hpp
@@ -18,9 +18,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     std::shared_ptr<CustomLayerHost> host;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/fill_extrusion_layer.cpp b/src/mbgl/style/layers/fill_extrusion_layer.cpp
index 9a5cc02df4..7ca9d6ed6f 100644
--- a/src/mbgl/style/layers/fill_extrusion_layer.cpp
+++ b/src/mbgl/style/layers/fill_extrusion_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_fill_extrusion_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoFillExtrusion
+
+// static
+const LayerTypeInfo* FillExtrusionLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"fill-extrusion",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::Required,
           LayerTypeInfo::Layout::Required,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 FillExtrusionLayer::FillExtrusionLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::FillExtrusion, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 FillExtrusionLayer::FillExtrusionLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> FillExtrusionLayer::cloneRef(const std::string& id_) cons
 void FillExtrusionLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* FillExtrusionLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoFillExtrusion;
-}
-
 // Layout properties
 
 
@@ -503,26 +505,28 @@ Mutable<Layer::Impl> FillExtrusionLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-FillExtrusionLayerFactory::FillExtrusionLayerFactory() = default;
-
-FillExtrusionLayerFactory::~FillExtrusionLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* FillExtrusionLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoFillExtrusion;
+const style::LayerTypeInfo* FillExtrusionLayerFactory::getTypeInfo() const noexcept {
+    return style::FillExtrusionLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> FillExtrusionLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> FillExtrusionLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new FillExtrusionLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::FillExtrusionLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> FillExtrusionLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderFillExtrusionLayer>(staticImmutableCast<style::FillExtrusionLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/fill_extrusion_layer_impl.cpp b/src/mbgl/style/layers/fill_extrusion_layer_impl.cpp
index 357ea3e973..18eea1f7fc 100644
--- a/src/mbgl/style/layers/fill_extrusion_layer_impl.cpp
+++ b/src/mbgl/style/layers/fill_extrusion_layer_impl.cpp
@@ -4,7 +4,7 @@ namespace mbgl {
 namespace style {
 
 bool FillExtrusionLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::FillExtrusion);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::FillExtrusionLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/fill_extrusion_layer_impl.hpp b/src/mbgl/style/layers/fill_extrusion_layer_impl.hpp
index 6758320c2b..dcb6de1d8c 100644
--- a/src/mbgl/style/layers/fill_extrusion_layer_impl.hpp
+++ b/src/mbgl/style/layers/fill_extrusion_layer_impl.hpp
@@ -13,10 +13,11 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     Properties<>::Unevaluated layout;
     FillExtrusionPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/fill_layer.cpp b/src/mbgl/style/layers/fill_layer.cpp
index 17a5eaf3b1..480fc597dd 100644
--- a/src/mbgl/style/layers/fill_layer.cpp
+++ b/src/mbgl/style/layers/fill_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_fill_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoFill
+
+// static
+const LayerTypeInfo* FillLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"fill",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::Required,
           LayerTypeInfo::Clipping::Required
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 FillLayer::FillLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Fill, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 FillLayer::FillLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> FillLayer::cloneRef(const std::string& id_) const {
 void FillLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* FillLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoFill;
-}
-
 // Layout properties
 
 
@@ -503,26 +505,28 @@ Mutable<Layer::Impl> FillLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-FillLayerFactory::FillLayerFactory() = default;
-
-FillLayerFactory::~FillLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* FillLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoFill;
+const style::LayerTypeInfo* FillLayerFactory::getTypeInfo() const noexcept {
+    return style::FillLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> FillLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> FillLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new FillLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::FillLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> FillLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderFillLayer>(staticImmutableCast<style::FillLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/fill_layer_impl.cpp b/src/mbgl/style/layers/fill_layer_impl.cpp
index a8ba1b693b..4df32e02fa 100644
--- a/src/mbgl/style/layers/fill_layer_impl.cpp
+++ b/src/mbgl/style/layers/fill_layer_impl.cpp
@@ -4,7 +4,7 @@ namespace mbgl {
 namespace style {
 
 bool FillLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::Fill);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::FillLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/fill_layer_impl.hpp b/src/mbgl/style/layers/fill_layer_impl.hpp
index 5b0592d062..92f3c97284 100644
--- a/src/mbgl/style/layers/fill_layer_impl.hpp
+++ b/src/mbgl/style/layers/fill_layer_impl.hpp
@@ -13,10 +13,11 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     Properties<>::Unevaluated layout;
     FillPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/heatmap_layer.cpp b/src/mbgl/style/layers/heatmap_layer.cpp
index 113f158f51..92477615b2 100644
--- a/src/mbgl/style/layers/heatmap_layer.cpp
+++ b/src/mbgl/style/layers/heatmap_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_heatmap_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoHeatmap
+
+// static
+const LayerTypeInfo* HeatmapLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"heatmap",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::Required,
           LayerTypeInfo::Layout::NotRequired,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 HeatmapLayer::HeatmapLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Heatmap, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 HeatmapLayer::HeatmapLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> HeatmapLayer::cloneRef(const std::string& id_) const {
 void HeatmapLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* HeatmapLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoHeatmap;
-}
-
 // Layout properties
 
 
@@ -388,26 +390,28 @@ Mutable<Layer::Impl> HeatmapLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-HeatmapLayerFactory::HeatmapLayerFactory() = default;
-
-HeatmapLayerFactory::~HeatmapLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* HeatmapLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoHeatmap;
+const style::LayerTypeInfo* HeatmapLayerFactory::getTypeInfo() const noexcept {
+    return style::HeatmapLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> HeatmapLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> HeatmapLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new HeatmapLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::HeatmapLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> HeatmapLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderHeatmapLayer>(staticImmutableCast<style::HeatmapLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/heatmap_layer_impl.cpp b/src/mbgl/style/layers/heatmap_layer_impl.cpp
index 8fd0cf72b2..dd5baaeb44 100644
--- a/src/mbgl/style/layers/heatmap_layer_impl.cpp
+++ b/src/mbgl/style/layers/heatmap_layer_impl.cpp
@@ -4,7 +4,7 @@ namespace mbgl {
 namespace style {
 
 bool HeatmapLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::Heatmap);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::HeatmapLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/heatmap_layer_impl.hpp b/src/mbgl/style/layers/heatmap_layer_impl.hpp
index 7645fa0cc1..3022293860 100644
--- a/src/mbgl/style/layers/heatmap_layer_impl.hpp
+++ b/src/mbgl/style/layers/heatmap_layer_impl.hpp
@@ -13,9 +13,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-   const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     HeatmapPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/hillshade_layer.cpp b/src/mbgl/style/layers/hillshade_layer.cpp
index 81d2c32f6f..d914d0cdea 100644
--- a/src/mbgl/style/layers/hillshade_layer.cpp
+++ b/src/mbgl/style/layers/hillshade_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_hillshade_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoHillshade
+
+// static
+const LayerTypeInfo* HillshadeLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"hillshade",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::Required,
           LayerTypeInfo::Layout::NotRequired,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 HillshadeLayer::HillshadeLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Hillshade, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 HillshadeLayer::HillshadeLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> HillshadeLayer::cloneRef(const std::string& id_) const {
 void HillshadeLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* HillshadeLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoHillshade;
-}
-
 // Layout properties
 
 
@@ -435,23 +437,25 @@ Mutable<Layer::Impl> HillshadeLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-HillshadeLayerFactory::HillshadeLayerFactory() = default;
-
-HillshadeLayerFactory::~HillshadeLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* HillshadeLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoHillshade;
+const style::LayerTypeInfo* HillshadeLayerFactory::getTypeInfo() const noexcept {
+    return style::HillshadeLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> HillshadeLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> HillshadeLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new HillshadeLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::HillshadeLayer(id, *source));
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> HillshadeLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderHillshadeLayer>(staticImmutableCast<style::HillshadeLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/hillshade_layer_impl.hpp b/src/mbgl/style/layers/hillshade_layer_impl.hpp
index 520b18cc84..86409fa542 100644
--- a/src/mbgl/style/layers/hillshade_layer_impl.hpp
+++ b/src/mbgl/style/layers/hillshade_layer_impl.hpp
@@ -13,9 +13,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     HillshadePaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/layer.cpp.ejs b/src/mbgl/style/layers/layer.cpp.ejs
index 0971e1af5b..d03e41da76 100644
--- a/src/mbgl/style/layers/layer.cpp.ejs
+++ b/src/mbgl/style/layers/layer.cpp.ejs
@@ -16,10 +16,12 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_<%- type.replace('-', '_') %>_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {<%
+<%
 let layerCapabilities = {};
 let defaults = { caps: { 'Source':   'NotRequired',
                          'Pass3D':   'NotRequired',
@@ -60,19 +62,23 @@ layerCapabilities['line']           = layerCapabilities['fill'];
 layerCapabilities['heatmap']        = layerCapabilities['hillshade'];
 layerCapabilities['raster']         = layerCapabilities['circle'];
 %>
-    const LayerTypeInfo typeInfo<%- `${camelize(type)}`%>
+// static
+const LayerTypeInfo* <%- camelize(type) %>Layer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"<%- type %>",
           <%-`${layerCapabilities[type].map(cap => `LayerTypeInfo::${cap}`).join(',\n          ')}` %>
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 <% if (type === 'background') { -%>
 <%- camelize(type) %>Layer::<%- camelize(type) %>Layer(const std::string& layerID)
-    : Layer(makeMutable<Impl>(LayerType::<%- camelize(type) %>, layerID, std::string())) {
+    : Layer(makeMutable<Impl>(layerID, std::string())) {
 }
 <% } else { -%>
 <%- camelize(type) %>Layer::<%- camelize(type) %>Layer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::<%- camelize(type) %>, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 <% } -%>
 
@@ -106,10 +112,6 @@ void <%- camelize(type) %>Layer::Impl::stringifyLayout(rapidjson::Writer<rapidjs
 }
 <% } -%>
 
-const LayerTypeInfo* <%- camelize(type) %>Layer::Impl::getTypeInfo() const noexcept {
-    return &typeInfo<%- camelize(type) %>;
-}
-
 // Layout properties
 
 <% for (const property of layoutProperties) { -%>
@@ -311,25 +313,23 @@ Mutable<Layer::Impl> <%- camelize(type) %>Layer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-<%- camelize(type) %>LayerFactory::<%- camelize(type) %>LayerFactory() = default;
-
-<%- camelize(type) %>LayerFactory::~<%- camelize(type) %>LayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* <%- camelize(type) %>LayerFactory::getTypeInfo() const noexcept {
-    return &typeInfo<%- camelize(type) %>;
+const style::LayerTypeInfo* <%- camelize(type) %>LayerFactory::getTypeInfo() const noexcept {
+    return style::<%- camelize(type) %>Layer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> <%- camelize(type) %>LayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> <%- camelize(type) %>LayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
 <% if (type === 'background') { -%>
     (void)value;
-    return std::unique_ptr<style::Layer>(new <%- camelize(type) %>Layer(id));
+    return std::unique_ptr<style::Layer>(new style::<%- camelize(type) %>Layer(id));
 <% } else { -%>
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new <%- camelize(type) %>Layer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::<%- camelize(type) %>Layer(id, *source));
 <% if (type !== 'raster' && type !== 'hillshade') { -%>
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
@@ -339,5 +339,9 @@ std::unique_ptr<style::Layer> <%- camelize(type) %>LayerFactory::createLayer(con
 <% } -%>
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> <%- camelize(type) %>LayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<Render<%- camelize(type) %>Layer>(staticImmutableCast<style::<%- camelize(type) %>Layer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/line_layer.cpp b/src/mbgl/style/layers/line_layer.cpp
index aeb0635254..f021a5fd73 100644
--- a/src/mbgl/style/layers/line_layer.cpp
+++ b/src/mbgl/style/layers/line_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_line_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoLine
+
+// static
+const LayerTypeInfo* LineLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"line",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::Required,
           LayerTypeInfo::Clipping::Required
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 LineLayer::LineLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Line, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 LineLayer::LineLayer(Immutable<Impl> impl_)
@@ -53,10 +59,6 @@ void LineLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>
     layout.stringify(writer);
 }
 
-const LayerTypeInfo* LineLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoLine;
-}
-
 // Layout properties
 
 PropertyValue<LineCapType> LineLayer::getDefaultLineCap() {
@@ -842,26 +844,28 @@ Mutable<Layer::Impl> LineLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-LineLayerFactory::LineLayerFactory() = default;
-
-LineLayerFactory::~LineLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* LineLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoLine;
+const style::LayerTypeInfo* LineLayerFactory::getTypeInfo() const noexcept {
+    return style::LineLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> LineLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> LineLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new LineLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::LineLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> LineLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderLineLayer>(staticImmutableCast<style::LineLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/line_layer_impl.cpp b/src/mbgl/style/layers/line_layer_impl.cpp
index 68cd3a8f49..b5183ba9ae 100644
--- a/src/mbgl/style/layers/line_layer_impl.cpp
+++ b/src/mbgl/style/layers/line_layer_impl.cpp
@@ -4,7 +4,7 @@ namespace mbgl {
 namespace style {
 
 bool LineLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::Line);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::LineLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/line_layer_impl.hpp b/src/mbgl/style/layers/line_layer_impl.hpp
index cd56a18fa8..af6c13dfd3 100644
--- a/src/mbgl/style/layers/line_layer_impl.hpp
+++ b/src/mbgl/style/layers/line_layer_impl.hpp
@@ -13,10 +13,11 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     LineLayoutProperties::Unevaluated layout;
     LinePaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/raster_layer.cpp b/src/mbgl/style/layers/raster_layer.cpp
index 0356c2f75c..40224a0b6d 100644
--- a/src/mbgl/style/layers/raster_layer.cpp
+++ b/src/mbgl/style/layers/raster_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_raster_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoRaster
+
+// static
+const LayerTypeInfo* RasterLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"raster",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::NotRequired,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 RasterLayer::RasterLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Raster, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 RasterLayer::RasterLayer(Immutable<Impl> impl_)
@@ -52,10 +58,6 @@ std::unique_ptr<Layer> RasterLayer::cloneRef(const std::string& id_) const {
 void RasterLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const {
 }
 
-const LayerTypeInfo* RasterLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoRaster;
-}
-
 // Layout properties
 
 
@@ -524,23 +526,25 @@ Mutable<Layer::Impl> RasterLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-RasterLayerFactory::RasterLayerFactory() = default;
-
-RasterLayerFactory::~RasterLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* RasterLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoRaster;
+const style::LayerTypeInfo* RasterLayerFactory::getTypeInfo() const noexcept {
+    return style::RasterLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> RasterLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> RasterLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new RasterLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::RasterLayer(id, *source));
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> RasterLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderRasterLayer>(staticImmutableCast<style::RasterLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/raster_layer_impl.hpp b/src/mbgl/style/layers/raster_layer_impl.hpp
index 2e93ecec80..740efff322 100644
--- a/src/mbgl/style/layers/raster_layer_impl.hpp
+++ b/src/mbgl/style/layers/raster_layer_impl.hpp
@@ -13,9 +13,10 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
 
     RasterPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style
diff --git a/src/mbgl/style/layers/symbol_layer.cpp b/src/mbgl/style/layers/symbol_layer.cpp
index 65a81c1071..f4fbf550f2 100644
--- a/src/mbgl/style/layers/symbol_layer.cpp
+++ b/src/mbgl/style/layers/symbol_layer.cpp
@@ -11,21 +11,27 @@
 #include <mbgl/style/conversion_impl.hpp>
 #include <mbgl/util/fnv_hash.hpp>
 
+#include <mbgl/renderer/layers/render_symbol_layer.hpp>
+
 namespace mbgl {
 namespace style {
 
-namespace {
-    const LayerTypeInfo typeInfoSymbol
+
+// static
+const LayerTypeInfo* SymbolLayer::Impl::staticTypeInfo() noexcept {
+    const static LayerTypeInfo typeInfo
         {"symbol",
           LayerTypeInfo::Source::Required,
           LayerTypeInfo::Pass3D::NotRequired,
           LayerTypeInfo::Layout::Required,
           LayerTypeInfo::Clipping::NotRequired
         };
-}  // namespace
+    return &typeInfo;
+}
+
 
 SymbolLayer::SymbolLayer(const std::string& layerID, const std::string& sourceID)
-    : Layer(makeMutable<Impl>(LayerType::Symbol, layerID, sourceID)) {
+    : Layer(makeMutable<Impl>(layerID, sourceID)) {
 }
 
 SymbolLayer::SymbolLayer(Immutable<Impl> impl_)
@@ -53,10 +59,6 @@ void SymbolLayer::Impl::stringifyLayout(rapidjson::Writer<rapidjson::StringBuffe
     layout.stringify(writer);
 }
 
-const LayerTypeInfo* SymbolLayer::Impl::getTypeInfo() const noexcept {
-    return &typeInfoSymbol;
-}
-
 // Layout properties
 
 PropertyValue<SymbolPlacementType> SymbolLayer::getDefaultSymbolPlacement() {
@@ -1992,26 +1994,28 @@ Mutable<Layer::Impl> SymbolLayer::mutableBaseImpl() const {
     return staticMutableCast<Layer::Impl>(mutableImpl());
 }
 
-SymbolLayerFactory::SymbolLayerFactory() = default;
-
-SymbolLayerFactory::~SymbolLayerFactory() = default;
+} // namespace style
 
-const LayerTypeInfo* SymbolLayerFactory::getTypeInfo() const noexcept {
-    return &typeInfoSymbol;
+const style::LayerTypeInfo* SymbolLayerFactory::getTypeInfo() const noexcept {
+    return style::SymbolLayer::Impl::staticTypeInfo();
 }
 
-std::unique_ptr<style::Layer> SymbolLayerFactory::createLayer(const std::string& id, const conversion::Convertible& value) {
+std::unique_ptr<style::Layer> SymbolLayerFactory::createLayer(const std::string& id, const style::conversion::Convertible& value) noexcept {
     optional<std::string> source = getSource(value);
     if (!source) {
         return nullptr;
     }
 
-    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new SymbolLayer(id, *source));
+    std::unique_ptr<style::Layer> layer = std::unique_ptr<style::Layer>(new style::SymbolLayer(id, *source));
     if (!initSourceLayerAndFilter(layer.get(), value)) {
         return nullptr;
     }
     return layer;
 }
 
-} // namespace style
+std::unique_ptr<RenderLayer> SymbolLayerFactory::createRenderLayer(Immutable<style::Layer::Impl> impl) noexcept {
+    assert(impl->getTypeInfo() == getTypeInfo());
+    return std::make_unique<RenderSymbolLayer>(staticImmutableCast<style::SymbolLayer::Impl>(std::move(impl)));
+}
+
 } // namespace mbgl
diff --git a/src/mbgl/style/layers/symbol_layer_impl.cpp b/src/mbgl/style/layers/symbol_layer_impl.cpp
index e177391686..3dd1da1136 100644
--- a/src/mbgl/style/layers/symbol_layer_impl.cpp
+++ b/src/mbgl/style/layers/symbol_layer_impl.cpp
@@ -6,7 +6,7 @@ namespace mbgl {
 namespace style {
 
 bool SymbolLayer::Impl::hasLayoutDifference(const Layer::Impl& other) const {
-    assert(other.type == LayerType::Symbol);
+    assert(other.getTypeInfo() == getTypeInfo());
     const auto& impl = static_cast<const style::SymbolLayer::Impl&>(other);
     return filter     != impl.filter ||
            visibility != impl.visibility ||
diff --git a/src/mbgl/style/layers/symbol_layer_impl.hpp b/src/mbgl/style/layers/symbol_layer_impl.hpp
index 01ff9772b8..a5b0332f6c 100644
--- a/src/mbgl/style/layers/symbol_layer_impl.hpp
+++ b/src/mbgl/style/layers/symbol_layer_impl.hpp
@@ -13,11 +13,12 @@ public:
 
     bool hasLayoutDifference(const Layer::Impl&) const override;
     void stringifyLayout(rapidjson::Writer<rapidjson::StringBuffer>&) const override;
-    const LayerTypeInfo* getTypeInfo() const noexcept final;
     void populateFontStack(std::set<FontStack>& fontStack) const final;
 
     SymbolLayoutProperties::Unevaluated layout;
     SymbolPaintProperties::Transitionable paint;
+
+    DECLARE_LAYER_TYPE_INFO;
 };
 
 } // namespace style