do not load fonts for already cached sources

Author: Dane Springmeyer

lib/mapnik_backend.js

@@ -19,18 +19,12 @@ exports = module.exports = MapnikSource;
 require('util').inherits(MapnikSource, require('events').EventEmitter);
 function MapnikSource(uri, callback) {
     uri = this._normalizeURI(uri);
-    var key = JSON.stringify(uri);
 
     if (uri.protocol && uri.protocol !== 'mapnik:') {
         throw new Error('Only the mapnik protocol is supported');
     }
 
-    // This deafults to true. To disable font auto-loading
-    // Set ?autoLoadFonts=false in the mapnik URL to disable
-    if (uri.query.autoLoadFonts) {
-        if (mapnik.register_default_fonts) mapnik.register_default_fonts();
-        if (mapnik.register_system_fonts) mapnik.register_system_fonts();
-    }
+    var key = JSON.stringify(uri);
 
     // by default we use an internal self-caching mechanism but
     // calling applications can pass `internal_cache:false` to disable
@@ -150,6 +144,13 @@ MapnikSource.prototype._open = function(uri) {
     this.metatile = uri.query.metatile;
     this.bufferSize = uri.query.bufferSize;
 
+    // This defaults to true. To disable font auto-loading
+    // Set ?autoLoadFonts=false in the mapnik URL to disable
+    if (this._autoLoadFonts) {
+        if (mapnik.register_default_fonts) mapnik.register_default_fonts();
+        if (mapnik.register_system_fonts) mapnik.register_system_fonts();
+    }
+
     // Initialize this map. This wraps `localize()` and calls `create()`
     // afterwards to actually create a new Mapnik map object.
     Step(function() {