core: Update Hillshade Algorithms and add Color-Relief Layer support (#3965)

platform/node/src/node_conversion.hpp

@@ -121,6 +121,18 @@ public:
             return {Nan::To<std::int32_t>(value).ToChecked()};
         } else if (value->IsNumber()) {
             return {Nan::To<double>(value).ToChecked()};
+        } else if (value->IsArray()) {
+            v8::Local<v8::Array> array = value.As<v8::Array>();
+            std::vector<Value> result;
+            result.reserve(array->Length());
+            for (uint32_t i = 0; i < array->Length(); ++i) {
+                v8::Local<v8::Value> item = Nan::Get(array, i).ToLocalChecked();
+                auto converted = toValue(item);
+                if (converted) {
+                    result.push_back(*converted);
+                }
+            }
+            return {result};
         } else {
             return {};
         }

platform/node/src/node_expression.cpp

@@ -51,7 +51,9 @@ type::Type parseType(v8::Local<v8::Object> type) {
         {"formatted", type::Formatted},
         {"number-format", type::String},
         {"resolvedImage", type::Image},
-        {"variableAnchorOffsetCollection", type::VariableAnchorOffsetCollection}};
+        {"variableAnchorOffsetCollection", type::VariableAnchorOffsetCollection},
+        {"numberArray", type::Array(type::Number)},
+        {"colorArray", type::Array(type::Color)}};
 
     v8::Local<v8::Value> v8kind = Nan::Get(type, Nan::New("kind").ToLocalChecked()).ToLocalChecked();
     std::string kind(*v8::String::Utf8Value(v8::Isolate::GetCurrent(), v8kind));

platform/node/src/node_map.cpp

@@ -16,6 +16,7 @@
 #include <mbgl/style/layers/fill_extrusion_layer.hpp>
 #include <mbgl/style/layers/heatmap_layer.hpp>
 #include <mbgl/style/layers/hillshade_layer.hpp>
+#include <mbgl/style/layers/color_relief_layer.hpp>
 #include <mbgl/style/layers/line_layer.hpp>
 #include <mbgl/style/layers/raster_layer.hpp>
 #include <mbgl/style/layers/symbol_layer.hpp>