[core] Split MapMode::Still into Static and Tile

`Tile` makes sure the symbols in the resulting tile are tileable while
symbols in `Still` match rendering in `Continuous` mode.

5 files changed, 26 insertions, 9 deletions

diff --git a/platform/default/mbgl/map/map_snapshotter.cpp b/platform/default/mbgl/map/map_snapshotter.cpp
index 7b4ec5913b..9341c23cfd 100644
--- a/platform/default/mbgl/map/map_snapshotter.cpp
+++ b/platform/default/mbgl/map/map_snapshotter.cpp
@@ -50,7 +50,7 @@ MapSnapshotter::Impl::Impl(FileSource& fileSource,
            const optional<LatLngBounds> region,
            const optional<std::string> programCacheDir)
     : frontend(size, pixelRatio, fileSource, scheduler, programCacheDir)
-    , map(frontend, MapObserver::nullObserver(), size, pixelRatio, fileSource, scheduler, MapMode::Still) {
+    , map(frontend, MapObserver::nullObserver(), size, pixelRatio, fileSource, scheduler, MapMode::Static) {
 
     map.getStyle().loadURL(styleURL);
 
diff --git a/platform/node/CHANGELOG.md b/platform/node/CHANGELOG.md
index 4b93fca25d..feb2b4185d 100644
--- a/platform/node/CHANGELOG.md
+++ b/platform/node/CHANGELOG.md
@@ -1,3 +1,6 @@
+# master
+- The `Map` constructor now accepts a `mode` option which can be either `"static"` (default) or `"tile"`. It must be set to `"tile"` when rendering individual tiles in order for the symbols to match across tiles.
+
 # 3.5.8 - October 19, 2017
 - Fixes an issue that causes memory leaks when not deleting the frontend object
   in NodeMap::release()
diff --git a/platform/node/src/node_map.cpp b/platform/node/src/node_map.cpp
index 6deccf05bf..b8c5e9cc88 100644
--- a/platform/node/src/node_map.cpp
+++ b/platform/node/src/node_map.cpp
@@ -548,7 +548,7 @@ void NodeMap::cancel() {
 
     frontend = std::make_unique<mbgl::HeadlessFrontend>(mbgl::Size{ 256, 256 }, pixelRatio, *this, threadpool);
     map = std::make_unique<mbgl::Map>(*frontend, mapObserver, frontend->getSize(), pixelRatio,
-                                      *this, threadpool, mbgl::MapMode::Still);
+                                      *this, threadpool, mode);
 
     // FIXME: Reload the style after recreating the map. We need to find
     // a better way of canceling an ongoing rendering on the core level
@@ -1074,6 +1074,15 @@ NodeMap::NodeMap(v8::Local<v8::Object> options)
                            ->NumberValue()
                      : 1.0;
       }())
+    , mode([&] {
+            Nan::HandleScope scope;
+            if (Nan::Has(options, Nan::New("mode").ToLocalChecked()).FromJust() &&
+                std::string(*v8::String::Utf8Value(Nan::Get(options, Nan::New("mode").ToLocalChecked()).ToLocalChecked()->ToString())) == "tile") {
+                return mbgl::MapMode::Tile;
+            } else {
+                return mbgl::MapMode::Static;
+            }
+      }())
     , mapObserver(NodeMapObserver())
     , frontend(std::make_unique<mbgl::HeadlessFrontend>(mbgl::Size { 256, 256 }, pixelRatio, *this, threadpool))
     , map(std::make_unique<mbgl::Map>(*frontend,
@@ -1082,7 +1091,7 @@ NodeMap::NodeMap(v8::Local<v8::Object> options)
                                       pixelRatio,
                                       *this,
                                       threadpool,
-                                      mbgl::MapMode::Still)),
+                                      mode)),
       async(new uv_async_t) {
 
     async->data = this;
diff --git a/platform/node/src/node_map.hpp b/platform/node/src/node_map.hpp
index 8e7f0a3e58..b84f4d576f 100644
--- a/platform/node/src/node_map.hpp
+++ b/platform/node/src/node_map.hpp
@@ -74,6 +74,7 @@ public:
     std::unique_ptr<mbgl::AsyncRequest> request(const mbgl::Resource&, mbgl::FileSource::Callback);
 
     const float pixelRatio;
+    mbgl::MapMode mode;
     NodeThreadPool threadpool;
     NodeMapObserver mapObserver;
     std::unique_ptr<mbgl::HeadlessFrontend> frontend;
diff --git a/platform/node/test/suite_implementation.js b/platform/node/test/suite_implementation.js
index c5987538d0..b0be2fa0eb 100644
--- a/platform/node/test/suite_implementation.js
+++ b/platform/node/test/suite_implementation.js
@@ -14,21 +14,25 @@ mbgl.on('message', function(msg) {
 var maps = new Map();
 
 module.exports = function (style, options, callback) {
+    var tileMode = options.mapMode === 'tile';
     if (options.recycleMap) {
-        if (maps.has(options.pixelRatio)) {
-            var map = maps.get(options.pixelRatio);
+        var key = options.pixelRatio + '/' + tileMode;
+        if (maps.has(key)) {
+            var map = maps.get(key);
             map.request = mapRequest;
         } else {
-            maps.set(options.pixelRatio, new mbgl.Map({
+            maps.set(key, new mbgl.Map({
                 ratio: options.pixelRatio,
-                request: mapRequest
+                request: mapRequest,
+                mode: options.mapMode
             }));
-            var map = maps.get(options.pixelRatio);
+            var map = maps.get(key);
         }
     } else {
         var map = new mbgl.Map({
             ratio: options.pixelRatio,
-            request: mapRequest
+            request: mapRequest,
+            mode: options.mapMode
         });
     }