Clean up Renderer (still uses bluejay)

src/Renderer.js

@@ -12,7 +12,6 @@ const simplify = require('simplify-js');
 const Canvas = require('./Canvas');
 const LabelBuffer = require('./LabelBuffer');
 const Styler = require('./Styler');
-const Tile = require('./Tile');
 const utils = require('./utils');
 const config = require('./config');
 
@@ -143,8 +142,7 @@ class Renderer {
   }
 
   _renderTiles(tiles) {
-    var drawn, feature, i, j, k, l, label, labels, layer, layerId, len, len1, len2, len3, ref, ref1, tile;
-    drawn = {};
+    var feature, i, j, k, labels, layer, layerId, len, len1, len2, ref, ref1, tile;
     labels = [];
     ref = this._generateDrawOrder(tiles[0].xyz.z);
     for (i = 0, len = ref.length; i < len; i++) {
@@ -204,7 +202,7 @@ class Renderer {
     }
     
     switch (feature.style.type) {
-      case 'line':
+    case 'line': {
       let width = feature.style.paint['line-width'];
       if (width instanceof Object) {
         // TODO: apply the correct zoom based value
@@ -215,13 +213,15 @@ class Renderer {
         this.canvas.polyline(points, feature.color, width);
       }
       break;
-      case 'fill':
+    }
+    case 'fill': {
       points = feature.points.map((p) => {
         return this._scaleAndReduce(tile, feature, p, scale, false);
       });
       this.canvas.polygon(points, feature.color);
       break;
-      case 'symbol':
+    }
+    case 'symbol': {
       const text = feature.label || (genericSymbol = config.poiMarker);
       
       if (this._seen[text] && !genericSymbol) {
@@ -247,6 +247,8 @@ class Renderer {
       if (placed) {
         this._seen[text] = true;
       }
+      break;
+    }
     }
     return true;
   }