Update the tiles via ResourceLoader

src/mbgl/map/map_context.cpp

@@ -165,11 +165,9 @@ void MapContext::loadStyleJSON(const std::string& json, const std::string& base)
 
 void MapContext::updateTiles() {
     assert(Environment::currentlyOn(ThreadType::Map));
-    if (!style) return;
-    for (const auto& source : style->sources) {
-        source->update(data, transformState, *style, *glyphAtlas, *glyphStore, *spriteAtlas,
-                       getSprite(), *texturePool);
-    }
+
+    resourceLoader->update(data, transformState, *glyphAtlas, *glyphStore,
+                           *spriteAtlas, getSprite(), *texturePool);
 }
 
 void MapContext::updateAnnotationTiles(const std::vector<TileID>& ids) {

src/mbgl/map/resource_loader.cpp

@@ -41,6 +41,23 @@ void ResourceLoader::setAccessToken(const std::string& accessToken) {
     accessToken_ = accessToken;
 }
 
+void ResourceLoader::update(MapData& data,
+                            const TransformState& transform,
+                            GlyphAtlas& glyphAtlas,
+                            GlyphStore& glyphStore,
+                            SpriteAtlas& spriteAtlas,
+                            util::ptr<Sprite> sprite,
+                            TexturePool& texturePool) {
+    if (!style_) {
+        return;
+    }
+
+    for (const auto& source : style_->sources) {
+        source->update(
+            data, transform, *style_, glyphAtlas, glyphStore, spriteAtlas, sprite, texturePool);
+    }
+}
+
 void ResourceLoader::onSourceLoaded() {
     emitTileDataChanged();
 }

src/mbgl/map/resource_loader.hpp

@@ -8,7 +8,13 @@
 
 namespace mbgl {
 
+class GlyphAtlas;
+class GlyphStore;
+class MapData;
+class SpriteAtlas;
 class Style;
+class TexturePool;
+class TransformState;
 
 // ResourceLoader is responsible for loading and updating the Source(s) owned
 // by the Style. The Source object currently owns all the tiles, thus this
@@ -35,6 +41,11 @@ public:
     // Set the access token to be used for loading the tile data.
     void setAccessToken(const std::string& accessToken);
 
+    // Fetch the tiles needed by the current viewport and emit a signal when
+    // a tile is ready so observers can render the tile.
+    void update(MapData&, const TransformState&, GlyphAtlas&, GlyphStore&,
+                SpriteAtlas&, util::ptr<Sprite>, TexturePool&);
+
     // Source::Observer implementation.
     void onSourceLoaded() override;
     void onTileLoaded() override;