Merge branch 'master' into libuv010

31 files changed, 402 insertions, 256 deletions

diff --git a/common/curl_request.cpp b/common/curl_request.cpp
index 88b7712f66..416ed90cd1 100644
--- a/common/curl_request.cpp
+++ b/common/curl_request.cpp
@@ -315,7 +315,7 @@ void async_add_cb(uv_async_t * /*async*/) {
         curl_easy_setopt(handle, CURLOPT_URL, (*req)->url.c_str());
         curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, curl_write_cb);
         curl_easy_setopt(handle, CURLOPT_WRITEDATA, &(*req)->res->body);
-        curl_easy_setopt(handle, CURLOPT_ACCEPT_ENCODING, "deflate");
+        curl_easy_setopt(handle, CURLOPT_ACCEPT_ENCODING, "gzip, deflate");
         curl_easy_setopt(handle, CURLOPT_SHARE, curl_share);
         curl_multi_add_handle(curl_multi, handle);
     }
diff --git a/include/mbgl/geometry/interpolate.hpp b/include/mbgl/geometry/interpolate.hpp
deleted file mode 100644
index 998cba31cd..0000000000
--- a/include/mbgl/geometry/interpolate.hpp
+++ /dev/null
@@ -1,13 +0,0 @@
-#ifndef MBGL_GEOMETRY_INTERPOLATE
-#define MBGL_GEOMETRY_INTERPOLATE
-
-#include <mbgl/geometry/anchor.hpp>
-#include <mbgl/util/math.hpp>
-
-namespace mbgl {
-
-Anchors interpolate(const std::vector<Coordinate> &vertices, float spacing,
-                    float minScale, float maxScale, float tilePixelRatio, int start = 0);
-}
-
-#endif
diff --git a/include/mbgl/geometry/resample.hpp b/include/mbgl/geometry/resample.hpp
new file mode 100644
index 0000000000..bcfe4ca53d
--- /dev/null
+++ b/include/mbgl/geometry/resample.hpp
@@ -0,0 +1,13 @@
+#ifndef MBGL_GEOMETRY_INTERPOLATE
+#define MBGL_GEOMETRY_INTERPOLATE
+
+#include <mbgl/geometry/anchor.hpp>
+#include <mbgl/util/math.hpp>
+
+namespace mbgl {
+
+Anchors resample(const std::vector<Coordinate> &vertices, float spacing,
+                 float minScale, float maxScale, float tilePixelRatio, int start = 0);
+}
+
+#endif
diff --git a/include/mbgl/map/source.hpp b/include/mbgl/map/source.hpp
index 4ffd097193..5b51268bfe 100644
--- a/include/mbgl/map/source.hpp
+++ b/include/mbgl/map/source.hpp
@@ -25,7 +25,9 @@ struct box;
 
 class Source : public std::enable_shared_from_this<Source>, private util::noncopyable {
 public:
-    Source(SourceInfo info, const std::string &access_token = "");
+    Source(SourceInfo& info);
+
+    void load(Map &map);
 
     bool update(Map &map);
     void updateMatrices(const mat4 &projMatrix, const TransformState &transform);
@@ -38,11 +40,6 @@ public:
     std::forward_list<Tile::ID> getIDs() const;
     void updateClipIDs(const std::map<Tile::ID, ClipID> &mapping);
 
-    static std::string normalizeSourceURL(const std::string &url, const std::string &access_token);
-
-public:
-    const SourceInfo info;
-
 private:
     bool findLoadedChildren(const Tile::ID& id, int32_t maxCoveringZoom, std::forward_list<Tile::ID>& retain);
     bool findLoadedParent(const Tile::ID& id, int32_t minCoveringZoom, std::forward_list<Tile::ID>& retain);
@@ -55,7 +52,9 @@ private:
 
     double getZoom(const TransformState &state) const;
 
-private:
+    SourceInfo& info;
+    bool loaded = false;
+
     // Stores the time when this source was most recently updated.
     timestamp updated = 0;
 
diff --git a/include/mbgl/map/sprite.hpp b/include/mbgl/map/sprite.hpp
index 967f1d6614..7bc6665570 100644
--- a/include/mbgl/map/sprite.hpp
+++ b/include/mbgl/map/sprite.hpp
@@ -19,7 +19,7 @@ class FileSource;
 class SpritePosition {
 public:
     explicit SpritePosition() {}
-    explicit SpritePosition(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t pixelRatio = 1);
+    explicit SpritePosition(uint16_t x, uint16_t y, uint16_t width, uint16_t height, float pixelRatio = 1.0f);
 
     operator bool() const {
         return !(width == 0 && height == 0 && x == 0 && y == 0);
@@ -27,7 +27,7 @@ public:
 
     uint16_t x = 0, y = 0;
     uint16_t width = 0, height = 0;
-    uint8_t pixelRatio = 1;
+    float pixelRatio = 1.0f;
 };
 
 class Sprite : public std::enable_shared_from_this<Sprite>, private util::noncopyable {
diff --git a/include/mbgl/map/tile_data.hpp b/include/mbgl/map/tile_data.hpp
index 5991613a2d..3e639fcea1 100644
--- a/include/mbgl/map/tile_data.hpp
+++ b/include/mbgl/map/tile_data.hpp
@@ -67,9 +67,6 @@ protected:
 public:
     const SourceInfo &source;
 
-    // Request-related information.
-    const std::string url;
-
 protected:
     std::weak_ptr<platform::Request> req;
     std::string data;
diff --git a/include/mbgl/style/style_layer.hpp b/include/mbgl/style/style_layer.hpp
index f8cfff7f63..84981e3fb4 100644
--- a/include/mbgl/style/style_layer.hpp
+++ b/include/mbgl/style/style_layer.hpp
@@ -51,6 +51,7 @@ private:
     // aplied classes in order.
     template <typename T> void applyStyleProperties(float z, timestamp now);
     template <typename T> void applyStyleProperty(PropertyKey key, T &, float z, timestamp now);
+    template <typename T> void applyTransitionedStyleProperty(PropertyKey key, T &, float z, timestamp now);
 
     // Removes all expired style transitions.
     void cleanupAppliedStyleProperties(timestamp now);
diff --git a/include/mbgl/style/style_source.hpp b/include/mbgl/style/style_source.hpp
index fa5c8dfb34..b598550c65 100644
--- a/include/mbgl/style/style_source.hpp
+++ b/include/mbgl/style/style_source.hpp
@@ -4,6 +4,10 @@
 #include <mbgl/style/types.hpp>
 
 #include <memory>
+#include <vector>
+#include <string>
+
+#include <rapidjson/document.h>
 
 namespace mbgl {
 
@@ -11,27 +15,32 @@ class Source;
 
 class SourceInfo {
 public:
-    const SourceType type;
-    const std::string url;
-    const uint32_t tile_size;
-    const int32_t min_zoom;
-    const int32_t max_zoom;
-
-    SourceInfo(SourceType type = SourceType::Vector, const std::string &url = "",
-                uint32_t tile_size = 512, int32_t min_zoom = 0, int32_t max_zoom = 22)
-        : type(type), url(url), tile_size(tile_size), min_zoom(min_zoom), max_zoom(max_zoom) {}
+    SourceType type = SourceType::Vector;
+    std::string url;
+    std::vector<std::string> tiles;
+    uint16_t tile_size = 512;
+    uint16_t min_zoom = 0;
+    uint16_t max_zoom = 22;
+    std::string attribution;
+    std::array<float, 3> center = {{0, 0, 0}};
+    std::array<float, 4> bounds = {{-180, -90, 180, 90}};
+
+    void parseTileJSONProperties(const rapidjson::Value&);
 };
 
 
-class StyleSource {
+class StyleSource : public std::enable_shared_from_this<StyleSource> {
 public:
-    const SourceInfo info;
+    SourceInfo info;
 
     bool enabled = false;
     std::shared_ptr<Source> source;
 
-    StyleSource(const SourceInfo &info) : info(info) {}
+    StyleSource(const SourceInfo &info)
+        : info(info)
+    {}
 };
+
 }
 
 #endif
diff --git a/include/mbgl/util/interpolate.hpp b/include/mbgl/util/interpolate.hpp
new file mode 100644
index 0000000000..e8c3389350
--- /dev/null
+++ b/include/mbgl/util/interpolate.hpp
@@ -0,0 +1,25 @@
+#ifndef MBGL_UTIL_INTERPOLATE
+#define MBGL_UTIL_INTERPOLATE
+
+namespace mbgl {
+namespace util {
+
+template <typename T>
+T interpolate(const T a, const T b, const double t) {
+    return a * (1.0 - t) + b * t;
+}
+
+template <typename T>
+inline std::array<T, 4> interpolate(const std::array<T, 4>& a, const std::array<T, 4>& b, const double t) {
+    return {{
+        interpolate(a[0], b[0], t),
+        interpolate(a[1], b[1], t),
+        interpolate(a[2], b[2], t),
+        interpolate(a[3], b[3], t)
+    }};
+}
+
+}
+}
+
+#endif
diff --git a/include/mbgl/util/mapbox.hpp b/include/mbgl/util/mapbox.hpp
new file mode 100644
index 0000000000..0fbb9a91ed
--- /dev/null
+++ b/include/mbgl/util/mapbox.hpp
@@ -0,0 +1,17 @@
+#ifndef MBGL_UTIL_MAPBOX
+#define MBGL_UTIL_MAPBOX
+
+#include <string>
+
+namespace mbgl {
+namespace util {
+namespace mapbox {
+
+std::string normalizeSourceURL(const std::string& url, const std::string& accessToken);
+std::string normalizeGlyphsURL(const std::string& url, const std::string& accessToken);
+
+}
+}
+}
+
+#endif
diff --git a/include/mbgl/util/math.hpp b/include/mbgl/util/math.hpp
index 277fdc8fc3..fde2a4720b 100644
--- a/include/mbgl/util/math.hpp
+++ b/include/mbgl/util/math.hpp
@@ -57,11 +57,6 @@ inline T angle_to(const vec2<S>& a, const vec2<S>& b) {
     return std::atan2(a.y - b.y, a.x - b.x);
 }
 
-template <typename T, typename S1, typename S2>
-inline T interp(S1 a, S2 b, T t) {
-    return (a * ((T)1 - t)) + (b * t);
-}
-
 // Reflect an angle around 0 degrees
 template <typename T>
 inline std::array<T, 2> flip(const std::array<T, 2>& c) {
diff --git a/include/mbgl/util/transition.hpp b/include/mbgl/util/transition.hpp
index b12527124e..8a6836c885 100644
--- a/include/mbgl/util/transition.hpp
+++ b/include/mbgl/util/transition.hpp
@@ -30,12 +30,6 @@ public:
     virtual ~transition();
 
 protected:
-    double interpolateDouble(double from, double to, double t) const;
-    float interpolateFloat(float from, float to, double t) const;
-    Color interpolateColor(Color from, Color to, double t) const;
-    std::array<float, 2> interpolateFloatArray(std::array<float, 2> from, std::array<float, 2> to, double t) const;
-
-protected:
     const timestamp start, duration;
 };
 
diff --git a/include/mbgl/util/url.hpp b/include/mbgl/util/url.hpp
new file mode 100644
index 0000000000..14d9dd3160
--- /dev/null
+++ b/include/mbgl/util/url.hpp
@@ -0,0 +1,14 @@
+#ifndef MBGL_UTIL_URL
+#define MBGL_UTIL_URL
+
+#include <string>
+
+namespace mbgl {
+namespace util {
+
+std::string percentEncode(const std::string&);
+
+}
+}
+
+#endif
diff --git a/src/geometry/interpolate.cpp b/src/geometry/resample.cpp
index 618136ff47..abb3ef1e3c 100644
--- a/src/geometry/interpolate.cpp
+++ b/src/geometry/resample.cpp
@@ -1,6 +1,6 @@
-#include <mbgl/geometry/interpolate.hpp>
+#include <mbgl/geometry/resample.hpp>
 
-#include <mbgl/util/math.hpp>
+#include <mbgl/util/interpolate.hpp>
 
 #include <cmath>
 
@@ -15,9 +15,9 @@ const std::array<std::vector<float>, 4> minScaleArrays = {{
 }};
 
 
-Anchors interpolate(const std::vector<Coordinate> &vertices, float spacing,
-                    const float /*minScale*/, float maxScale, const float tilePixelRatio,
-                    const int start) {
+Anchors resample(const std::vector<Coordinate> &vertices, float spacing,
+                 const float /*minScale*/, float maxScale, const float tilePixelRatio,
+                 const int start) {
 
     maxScale = std::round(std::fmax(std::fmin(8.0f, maxScale / 2.0f), 1.0f));
     spacing *= tilePixelRatio / maxScale;
@@ -43,7 +43,8 @@ Anchors interpolate(const std::vector<Coordinate> &vertices, float spacing,
             markedDistance += spacing;
 
             float t = (markedDistance - distance) / segmentDist,
-                  x = util::interp(a.x, b.x, t), y = util::interp(a.y, b.y, t),
+                  x = util::interpolate(a.x, b.x, t),
+                  y = util::interpolate(a.y, b.y, t),
                   s = minScales[added % len];
 
             if (x >= 0 && x < 4096 && y >= 0 && y < 4096) {
diff --git a/src/map/map.cpp b/src/map/map.cpp
index 8caea4c797..8590b464bb 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -11,6 +11,7 @@
 #include <mbgl/util/constants.hpp>
 #include <mbgl/util/uv_detail.hpp>
 #include <mbgl/util/std.hpp>
+#include <mbgl/util/mapbox.hpp>
 #include <mbgl/style/style.hpp>
 #include <mbgl/text/glyph_store.hpp>
 #include <mbgl/geometry/glyph_atlas.hpp>
@@ -211,7 +212,7 @@ void Map::setStyleJSON(std::string newStyleJSON, const std::string &base) {
     sprite.reset();
     style->loadJSON((const uint8_t *)styleJSON.c_str());
     fileSource->setBase(base);
-    glyphStore->setURL(style->glyph_url);
+    glyphStore->setURL(util::mapbox::normalizeGlyphsURL(style->glyph_url, getAccessToken()));
     update();
 }
 
@@ -469,7 +470,8 @@ void Map::updateSources() {
     for (const std::shared_ptr<StyleSource> &style_source : activeSources) {
         if (style_source->enabled) {
             if (!style_source->source) {
-                style_source->source = std::make_shared<Source>(style_source->info, getAccessToken());
+                style_source->source = std::make_shared<Source>(style_source->info);
+                style_source->source->load(*this);
             }
         } else {
             style_source->source.reset();
diff --git a/src/map/source.cpp b/src/map/source.cpp
index 523a7f3bc7..b83384f25f 100644
--- a/src/map/source.cpp
+++ b/src/map/source.cpp
@@ -6,40 +6,59 @@
 #include <mbgl/util/raster.hpp>
 #include <mbgl/util/string.hpp>
 #include <mbgl/util/texturepool.hpp>
+#include <mbgl/util/filesource.hpp>
 #include <mbgl/util/vec.hpp>
 #include <mbgl/util/std.hpp>
+#include <mbgl/util/mapbox.hpp>
 #include <mbgl/geometry/glyph_atlas.hpp>
 #include <mbgl/style/style_layer.hpp>
-
+#include <mbgl/platform/log.hpp>
 
 #include <mbgl/map/vector_tile_data.hpp>
 #include <mbgl/map/raster_tile_data.hpp>
 
 namespace mbgl {
 
-Source::Source(SourceInfo info, const std::string &access_token)
-    : info(
-          info.type,
-          normalizeSourceURL(info.url, access_token),
-          info.tile_size,
-          info.min_zoom,
-          info.max_zoom
-      ) {}
-
-std::string Source::normalizeSourceURL(const std::string &url, const std::string &access_token) {
-    const std::string t = "mapbox://";
-    if (url.compare(0, t.length(), t) == 0) {
-        if (access_token.empty()) {
-            throw std::runtime_error("You must provide a Mapbox API access token for Mapbox tile sources");
-        }
-        return std::string("https://api.tiles.mapbox.com/v4/") + url.substr(t.length()) + "/{z}/{x}/{y}.vector.pbf?access_token=" + access_token;
-    } else {
-        return url;
+Source::Source(SourceInfo& info)
+    : info(info)
+{
+}
+
+// Note: This is a separate function that must be called exactly once after creation
+// The reason this isn't part of the constructor is that calling shared_from_this() in
+// the constructor fails.
+void Source::load(Map& map) {
+    if (info.url.empty()) {
+        loaded = true;
+        return;
     }
+
+    std::string url = util::mapbox::normalizeSourceURL(info.url, map.getAccessToken());
+    std::shared_ptr<Source> source = shared_from_this();
+
+    map.getFileSource()->load(ResourceType::JSON, url, [source, &map](platform::Response *res) {
+        if (res->code != 200) {
+            Log::Warning(Event::General, "failed to load source TileJSON");
+            return;
+        }
+
+        rapidjson::Document d;
+        d.Parse<0>(res->body.c_str());
+
+        if (d.HasParseError()) {
+            Log::Warning(Event::General, "invalid source TileJSON");
+            return;
+        }
+
+        source->info.parseTileJSONProperties(d);
+        source->loaded = true;
+
+        map.update();
+    });
 }
 
 bool Source::update(Map &map) {
-    if (map.getTime() > updated) {
+    if (loaded && map.getTime() > updated) {
         return updateTiles(map);
     } else {
         return false;
diff --git a/src/map/sprite.cpp b/src/map/sprite.cpp
index 88e940c00e..a8f4f97185 100644
--- a/src/map/sprite.cpp
+++ b/src/map/sprite.cpp
@@ -13,7 +13,7 @@
 
 using namespace mbgl;
 
-SpritePosition::SpritePosition(uint16_t x, uint16_t y, uint16_t width, uint16_t height, uint8_t pixelRatio)
+SpritePosition::SpritePosition(uint16_t x, uint16_t y, uint16_t width, uint16_t height, float pixelRatio)
     : x(x),
       y(y),
       width(width),
@@ -122,7 +122,7 @@ void Sprite::parseJSON() {
                 uint16_t y = 0;
                 uint16_t width = 0;
                 uint16_t height = 0;
-                uint8_t pixelRatio = 1;
+                float pixelRatio = 1.0f;
 
                 if (value.HasMember("x")) x = value["x"].GetInt();
                 if (value.HasMember("y")) y = value["y"].GetInt();
diff --git a/src/map/tile_data.cpp b/src/map/tile_data.cpp
index 4333e2d2fd..57afb8dadb 100644
--- a/src/map/tile_data.cpp
+++ b/src/map/tile_data.cpp
@@ -14,13 +14,6 @@ TileData::TileData(Tile::ID id, Map &map, const SourceInfo &source)
       state(State::initial),
       map(map),
       source(source),
-      url(util::replaceTokens(source.url, [&](const std::string &token) -> std::string {
-          if (token == "z") return std::to_string(id.z);
-          if (token == "x") return std::to_string(id.x);
-          if (token == "y") return std::to_string(id.y);
-          if (token == "ratio") return (map.getState().getPixelRatio() > 1.0 ? "@2x" : "");
-          return "";
-      })),
       debugBucket(debugFontBuffer) {
     // Initialize tile debug coordinates
     const std::string str = util::sprintf<32>("%d/%d/%d", id.z, id.x, id.y);
@@ -36,11 +29,23 @@ const std::string TileData::toString() const {
 }
 
 void TileData::request() {
+    if (source.tiles.empty())
+        return;
+
+    std::string url = source.tiles[(id.x + id.y) % source.tiles.size()];
+    url = util::replaceTokens(url, [&](const std::string &token) -> std::string {
+        if (token == "z") return std::to_string(id.z);
+        if (token == "x") return std::to_string(id.x);
+        if (token == "y") return std::to_string(id.y);
+        if (token == "ratio") return (map.getState().getPixelRatio() > 1.0 ? "@2x" : "");
+        return "";
+    });
+
     state = State::loading;
 
     // Note: Somehow this feels slower than the change to request_http()
     std::weak_ptr<TileData> weak_tile = shared_from_this();
-    map.getFileSource()->load(ResourceType::Tile, url, [weak_tile](platform::Response *res) {
+    map.getFileSource()->load(ResourceType::Tile, url, [weak_tile, url](platform::Response *res) {
         std::shared_ptr<TileData> tile = weak_tile.lock();
         if (!tile || tile->state == State::obsolete) {
             // noop. Tile is obsolete and we're now just waiting for the refcount
@@ -54,7 +59,7 @@ void TileData::request() {
             tile->reparse();
         } else {
 #if defined(DEBUG)
-            fprintf(stderr, "[%s] tile loading failed: %d, %s\n", tile->url.c_str(), res->code, res->error_message.c_str());
+            fprintf(stderr, "[%s] tile loading failed: %d, %s\n", url.c_str(), res->code, res->error_message.c_str());
 #endif
         }
     });
diff --git a/src/renderer/symbol_bucket.cpp b/src/renderer/symbol_bucket.cpp
index 30110faf02..e8c0fd1829 100644
--- a/src/renderer/symbol_bucket.cpp
+++ b/src/renderer/symbol_bucket.cpp
@@ -5,7 +5,7 @@
 #include <mbgl/geometry/sprite_atlas.hpp>
 #include <mbgl/geometry/geometry.hpp>
 #include <mbgl/geometry/anchor.hpp>
-#include <mbgl/geometry/interpolate.hpp>
+#include <mbgl/geometry/resample.hpp>
 #include <mbgl/renderer/painter.hpp>
 #include <mbgl/text/glyph_store.hpp>
 #include <mbgl/text/placement.hpp>
@@ -218,8 +218,8 @@ void SymbolBucket::addFeature(const std::vector<Coordinate> &line, const Shaping
 
     if (properties.placement == PlacementType::Line) {
         // Line labels
-        anchors = interpolate(line, properties.min_distance, minScale, collision.maxPlacementScale,
-                              collision.tilePixelRatio);
+        anchors = resample(line, properties.min_distance, minScale, collision.maxPlacementScale,
+                           collision.tilePixelRatio);
 
         // Sort anchors by segment so that we can start placement with the
         // anchors that can be shown at the lowest zoom levels.
diff --git a/src/style/function_properties.cpp b/src/style/function_properties.cpp
index 879de84f85..346efe65b6 100644
--- a/src/style/function_properties.cpp
+++ b/src/style/function_properties.cpp
@@ -1,35 +1,11 @@
 #include <mbgl/style/function_properties.hpp>
 #include <mbgl/style/types.hpp>
+#include <mbgl/util/interpolate.hpp>
 
 #include <cmath>
 
 namespace mbgl {
 
-
-template <typename T>
-inline T interpolate(T smaller, T larger, const float factor);
-
-template <>
-inline float interpolate(const float smaller, const float larger, const float factor) {
-    return (smaller * (1 - factor)) + (larger * factor);
-}
-
-template <>
-inline bool interpolate(const bool smaller, const bool larger, const float factor) {
-    return interpolate(float(smaller), float(larger), factor);
-}
-
-template <>
-inline Color interpolate(const Color smaller, const Color larger, const float factor) {
-    return {{
-        interpolate(smaller[0], larger[0], factor),
-        interpolate(smaller[1], larger[1], factor),
-        interpolate(smaller[2], larger[2], factor),
-        interpolate(smaller[3], larger[3], factor)
-    }};
-}
-
-
 template <typename T>
 inline T defaultStopsValue();
 
@@ -70,10 +46,10 @@ T StopsFunction<T>::evaluate(float z) const {
         const float zoomProgress = z - smaller_z;
         if (base == 1.0f) {
             const float t = zoomProgress / zoomDiff;
-            return interpolate<T>(smaller_val, larger_val, t);
+            return util::interpolate(smaller_val, larger_val, t);
         } else {
             const float t = (std::pow(base, zoomProgress) - 1) / (std::pow(base, zoomDiff) - 1);
-            return interpolate<T>(smaller_val, larger_val, t);
+            return util::interpolate(smaller_val, larger_val, t);
         }
     } else if (larger) {
         return larger_val;
diff --git a/src/style/style_layer.cpp b/src/style/style_layer.cpp
index 4994cf3efa..71916afe23 100644
--- a/src/style/style_layer.cpp
+++ b/src/style/style_layer.cpp
@@ -3,6 +3,8 @@
 #include <mbgl/style/style_layer_group.hpp>
 #include <mbgl/style/property_fallback.hpp>
 
+#include <mbgl/util/interpolate.hpp>
+
 namespace mbgl {
 
 StyleLayer::StyleLayer(const std::string &id, std::map<ClassID, ClassProperties> &&styles)
@@ -117,27 +119,26 @@ private:
     const float z;
 };
 
-inline float interpolate(const float a, const float b, const float t) {
-    return (1.0f - t) * a + t * b;
-}
-
-inline Color interpolate(const Color &a, const Color &b, const float t) {
-    const float rt = 1.0f - t;
-    return Color {{
-        rt * a[0] + t * b[0],
-        rt * a[1] + t * b[1],
-        rt * a[2] + t * b[2],
-        rt * a[3] + t * b[3]
-    }};
-}
-
 template <typename T>
-inline T interpolate(const T a, const T b, const float t) {
-    return t >= 0.5 ? b : a;
+void StyleLayer::applyStyleProperty(PropertyKey key, T &target, const float z, const timestamp now) {
+    auto it = appliedStyle.find(key);
+    if (it != appliedStyle.end()) {
+        AppliedClassProperties &applied = it->second;
+        // Iterate through all properties that we need to apply in order.
+        const PropertyEvaluator<T> evaluator(z);
+        for (AppliedClassProperty &property : applied.properties) {
+            if (now >= property.begin) {
+                // We overwrite the current property with the new value.
+                target = mapbox::util::apply_visitor(evaluator, property.value);
+            } else {
+                // Do not apply this property because its transition hasn't begun yet.
+            }
+        }
+    }
 }
 
 template <typename T>
-void StyleLayer::applyStyleProperty(PropertyKey key, T &target, const float z, const timestamp now) {
+void StyleLayer::applyTransitionedStyleProperty(PropertyKey key, T &target, const float z, const timestamp now) {
     auto it = appliedStyle.find(key);
     if (it != appliedStyle.end()) {
         AppliedClassProperties &applied = it->second;
@@ -150,7 +151,7 @@ void StyleLayer::applyStyleProperty(PropertyKey key, T &target, const float z, c
             } else if (now >= property.begin) {
                 // We overwrite the current property partially with the new value.
                 float progress = float(now - property.begin) / float(property.end - property.begin);
-                target = interpolate(target, mapbox::util::apply_visitor(evaluator, property.value), progress);
+                target = util::interpolate(target, mapbox::util::apply_visitor(evaluator, property.value), progress);
             } else {
                 // Do not apply this property because its transition hasn't begun yet.
             }
@@ -163,11 +164,11 @@ void StyleLayer::applyStyleProperties<FillProperties>(const float z, const times
     properties.set<FillProperties>();
     FillProperties &fill = properties.get<FillProperties>();
     applyStyleProperty(PropertyKey::FillAntialias, fill.antialias, z, now);
-    applyStyleProperty(PropertyKey::FillOpacity, fill.opacity, z, now);
-    applyStyleProperty(PropertyKey::FillColor, fill.fill_color, z, now);
-    applyStyleProperty(PropertyKey::FillOutlineColor, fill.stroke_color, z, now);
-    applyStyleProperty(PropertyKey::FillTranslateX, fill.translate[0], z, now);
-    applyStyleProperty(PropertyKey::FillTranslateY, fill.translate[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::FillOpacity, fill.opacity, z, now);
+    applyTransitionedStyleProperty(PropertyKey::FillColor, fill.fill_color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::FillOutlineColor, fill.stroke_color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::FillTranslateX, fill.translate[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::FillTranslateY, fill.translate[1], z, now);
     applyStyleProperty(PropertyKey::FillTranslateAnchor, fill.translateAnchor, z, now);
     applyStyleProperty(PropertyKey::FillImage, fill.image, z, now);
 }
@@ -176,16 +177,16 @@ template <>
 void StyleLayer::applyStyleProperties<LineProperties>(const float z, const timestamp now) {
     properties.set<LineProperties>();
     LineProperties &line = properties.get<LineProperties>();
-    applyStyleProperty(PropertyKey::LineOpacity, line.opacity, z, now);
-    applyStyleProperty(PropertyKey::LineColor, line.color, z, now);
-    applyStyleProperty(PropertyKey::LineTranslateX, line.translate[0], z, now);
-    applyStyleProperty(PropertyKey::LineTranslateY, line.translate[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineOpacity, line.opacity, z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineColor, line.color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineTranslateX, line.translate[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineTranslateY, line.translate[1], z, now);
     applyStyleProperty(PropertyKey::LineTranslateAnchor, line.translateAnchor, z, now);
-    applyStyleProperty(PropertyKey::LineWidth, line.width, z, now);
-    applyStyleProperty(PropertyKey::LineOffset, line.offset, z, now);
-    applyStyleProperty(PropertyKey::LineBlur, line.blur, z, now);
-    applyStyleProperty(PropertyKey::LineDashLand, line.dash_array[0], z, now);
-    applyStyleProperty(PropertyKey::LineDashGap, line.dash_array[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineWidth, line.width, z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineOffset, line.offset, z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineBlur, line.blur, z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineDashLand, line.dash_array[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::LineDashGap, line.dash_array[1], z, now);
     applyStyleProperty(PropertyKey::LineImage, line.image, z, now);
 }
 
@@ -193,47 +194,46 @@ template <>
 void StyleLayer::applyStyleProperties<SymbolProperties>(const float z, const timestamp now) {
     properties.set<SymbolProperties>();
     SymbolProperties &symbol = properties.get<SymbolProperties>();
-    applyStyleProperty(PropertyKey::IconOpacity, symbol.icon.opacity, z, now);
-    applyStyleProperty(PropertyKey::IconRotate, symbol.icon.rotate, z, now);
-    applyStyleProperty(PropertyKey::IconSize, symbol.icon.size, z, now);
-    applyStyleProperty(PropertyKey::IconColor, symbol.icon.color, z, now);
-    applyStyleProperty(PropertyKey::IconHaloColor, symbol.icon.halo_color, z, now);
-    applyStyleProperty(PropertyKey::IconHaloWidth, symbol.icon.halo_width, z, now);
-    applyStyleProperty(PropertyKey::IconHaloBlur, symbol.icon.halo_blur, z, now);
-    applyStyleProperty(PropertyKey::IconTranslateX, symbol.icon.translate[0], z, now);
-    applyStyleProperty(PropertyKey::IconTranslateY, symbol.icon.translate[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconOpacity, symbol.icon.opacity, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconRotate, symbol.icon.rotate, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconSize, symbol.icon.size, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconColor, symbol.icon.color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconHaloColor, symbol.icon.halo_color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconHaloWidth, symbol.icon.halo_width, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconHaloBlur, symbol.icon.halo_blur, z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconTranslateX, symbol.icon.translate[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::IconTranslateY, symbol.icon.translate[1], z, now);
     applyStyleProperty(PropertyKey::IconTranslateAnchor, symbol.icon.translate_anchor, z, now);
 
-    applyStyleProperty(PropertyKey::TextOpacity, symbol.text.opacity, z, now);
-    applyStyleProperty(PropertyKey::TextSize, symbol.text.size, z, now);
-    applyStyleProperty(PropertyKey::TextColor, symbol.text.color, z, now);
-    applyStyleProperty(PropertyKey::TextHaloColor, symbol.text.halo_color, z, now);
-    applyStyleProperty(PropertyKey::TextHaloWidth, symbol.text.halo_width, z, now);
-    applyStyleProperty(PropertyKey::TextHaloBlur, symbol.text.halo_blur, z, now);
-    applyStyleProperty(PropertyKey::TextTranslateX, symbol.text.translate[0], z, now);
-    applyStyleProperty(PropertyKey::TextTranslateY, symbol.text.translate[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextOpacity, symbol.text.opacity, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextSize, symbol.text.size, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextColor, symbol.text.color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextHaloColor, symbol.text.halo_color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextHaloWidth, symbol.text.halo_width, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextHaloBlur, symbol.text.halo_blur, z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextTranslateX, symbol.text.translate[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::TextTranslateY, symbol.text.translate[1], z, now);
     applyStyleProperty(PropertyKey::TextTranslateAnchor, symbol.text.translate_anchor, z, now);
-
 }
 
 template <>
 void StyleLayer::applyStyleProperties<RasterProperties>(const float z, const timestamp now) {
     properties.set<RasterProperties>();
     RasterProperties &raster = properties.get<RasterProperties>();
-    applyStyleProperty(PropertyKey::RasterOpacity, raster.opacity, z, now);
-    applyStyleProperty(PropertyKey::RasterHueRotate, raster.hue_rotate, z, now);
-    applyStyleProperty(PropertyKey::RasterBrightnessLow, raster.brightness[0], z, now);
-    applyStyleProperty(PropertyKey::RasterBrightnessHigh, raster.brightness[1], z, now);
-    applyStyleProperty(PropertyKey::RasterSaturation, raster.saturation, z, now);
-    applyStyleProperty(PropertyKey::RasterContrast, raster.contrast, z, now);
-    applyStyleProperty(PropertyKey::RasterFade, raster.fade, z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterOpacity, raster.opacity, z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterHueRotate, raster.hue_rotate, z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterBrightnessLow, raster.brightness[0], z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterBrightnessHigh, raster.brightness[1], z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterSaturation, raster.saturation, z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterContrast, raster.contrast, z, now);
+    applyTransitionedStyleProperty(PropertyKey::RasterFade, raster.fade, z, now);
 }
 
 template <>
 void StyleLayer::applyStyleProperties<BackgroundProperties>(const float z, const timestamp now) {
     properties.set<BackgroundProperties>();
     BackgroundProperties &background = properties.get<BackgroundProperties>();
-    applyStyleProperty(PropertyKey::BackgroundColor, background.color, z, now);
+    applyTransitionedStyleProperty(PropertyKey::BackgroundColor, background.color, z, now);
 }
 
 void StyleLayer::updateProperties(float z, const timestamp now) {
diff --git a/src/style/style_parser.cpp b/src/style/style_parser.cpp
index c2689162e2..2fccf1f404 100644
--- a/src/style/style_parser.cpp
+++ b/src/style/style_parser.cpp
@@ -1,3 +1,4 @@
+#include <mbgl/style/style_source.hpp>
 #include <mbgl/style/style_parser.hpp>
 #include <mbgl/style/style_layer_group.hpp>
 #include <mbgl/util/constants.hpp>
@@ -175,21 +176,14 @@ void StyleParser::parseSources(JSVal value) {
         rapidjson::Value::ConstMemberIterator itr = value.MemberBegin();
         for (; itr != value.MemberEnd(); ++itr) {
             std::string name { itr->name.GetString(), itr->name.GetStringLength() };
-            SourceType type = SourceType::Vector;
-            std::string url;
-            uint16_t tile_size = 512;
-            int32_t min_zoom = 0;
-            int32_t max_zoom = 22;
-
-            parseRenderProperty<SourceTypeClass>(itr->value, type, "type");
-            parseRenderProperty(itr->value, url, "url");
-            if (type == SourceType::Raster) {
-                parseRenderProperty(itr->value, tile_size, "tileSize");
-            }
-            parseRenderProperty(itr->value, min_zoom, "minZoom");
-            parseRenderProperty(itr->value, max_zoom, "maxZoom");
+            SourceInfo info;
+
+            parseRenderProperty<SourceTypeClass>(itr->value, info.type, "type");
+            parseRenderProperty(itr->value, info.url, "url");
+            parseRenderProperty(itr->value, info.tile_size, "tileSize");
+            info.parseTileJSONProperties(itr->value);
 
-            sources.emplace(std::move(name), std::make_shared<StyleSource>(SourceInfo { type, url, tile_size, min_zoom, max_zoom }));
+            sources.emplace(std::move(name), std::make_shared<StyleSource>(info));
         }
     } else {
         Log::Warning(Event::ParseStyle, "sources must be an object");
diff --git a/src/style/style_source.cpp b/src/style/style_source.cpp
new file mode 100644
index 0000000000..f46a6fb09b
--- /dev/null
+++ b/src/style/style_source.cpp
@@ -0,0 +1,77 @@
+#include <mbgl/style/style_source.hpp>
+#include <mbgl/platform/platform.hpp>
+#include <mbgl/platform/log.hpp>
+
+#include <limits>
+
+namespace mbgl {
+
+void parse(const rapidjson::Value& value, std::vector<std::string>& target, const char *name) {
+    if (!value.HasMember(name))
+        return;
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsArray())
+        return;
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++)
+        if (!property[i].IsString())
+            return;
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++)
+        target.emplace_back(std::string(property[i].GetString(), property[i].GetStringLength()));
+}
+
+void parse(const rapidjson::Value& value, std::string& target, const char* name) {
+    if (!value.HasMember(name))
+        return;
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsString())
+        return;
+
+    target = { property.GetString(), property.GetStringLength() };
+}
+
+void parse(const rapidjson::Value& value, uint16_t& target, const char* name) {
+    if (!value.HasMember(name))
+        return;
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsUint())
+        return;
+
+    unsigned int uint = property.GetUint();
+    if (uint > std::numeric_limits<uint16_t>::max())
+        return;
+
+    target = uint;
+}
+
+template <size_t N>
+void parse(const rapidjson::Value& value, std::array<float, N>& target, const char* name) {
+    if (!value.HasMember(name))
+        return;
+
+    const rapidjson::Value& property = value[name];
+    if (!property.IsArray() || property.Size() != N)
+        return;
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++)
+        if (!property[i].IsNumber())
+            return;
+
+    for (rapidjson::SizeType i = 0; i < property.Size(); i++)
+        target[i] = property[i].GetDouble();
+}
+
+void SourceInfo::parseTileJSONProperties(const rapidjson::Value& value) {
+    parse(value, tiles, "tiles");
+    parse(value, min_zoom, "minzoom");
+    parse(value, max_zoom, "maxzoom");
+    parse(value, attribution, "attribution");
+    parse(value, center, "center");
+    parse(value, bounds, "bounds");
+}
+
+}
diff --git a/src/text/glyph_store.cpp b/src/text/glyph_store.cpp
index 09f2fbc7b3..65941e91f7 100644
--- a/src/text/glyph_store.cpp
+++ b/src/text/glyph_store.cpp
@@ -4,6 +4,7 @@
 #include <mbgl/util/string.hpp>
 #include <mbgl/util/utf.hpp>
 #include <mbgl/util/pbf.hpp>
+#include <mbgl/util/url.hpp>
 #include <mbgl/util/constants.hpp>
 #include <mbgl/util/token.hpp>
 #include <mbgl/util/math.hpp>
@@ -141,14 +142,11 @@ GlyphPBF::GlyphPBF(const std::string &glyphURL, const std::string &fontStack, Gl
 {
     // Load the glyph set URL
     std::string url = util::replaceTokens(glyphURL, [&](const std::string &name) -> std::string {
-        if (name == "fontstack") return fontStack;
+        if (name == "fontstack") return util::percentEncode(fontStack);
         if (name == "range") return std::to_string(glyphRange.first) + "-" + std::to_string(glyphRange.second);
         return "";
     });
 
-    // TODO: Find more reliable URL normalization function
-    std::replace(url.begin(), url.end(), ' ', '+');
-
 #if defined(DEBUG)
     fprintf(stderr, "%s\n", url.c_str());
 #endif
diff --git a/src/text/rotation_range.cpp b/src/text/rotation_range.cpp
index 2596cf1bb6..3ebdfe91cb 100644
--- a/src/text/rotation_range.cpp
+++ b/src/text/rotation_range.cpp
@@ -1,5 +1,7 @@
 #include <mbgl/text/rotation_range.hpp>
 
+#include <mbgl/util/interpolate.hpp>
+
 #include <cassert>
 #include <algorithm>
 
@@ -117,8 +119,8 @@ rotatingRotatingCollisions(const CollisionRect &a, const CollisionRect &b,
 
 double getAngle(const CollisionPoint &p1, const CollisionPoint &p2,
                 CollisionAngle d, const CollisionPoint &corner) {
-    return std::fmod(util::angle_between(util::interp(p1.x, p2.x, d),
-                                    util::interp(p1.y, p2.y, d), corner.x,
+    return std::fmod(util::angle_between(util::interpolate(p1.x, p2.x, d),
+                                    util::interpolate(p1.y, p2.y, d), corner.x,
                                     corner.y) +
                     2 * M_PI,
                 2 * M_PI);
diff --git a/src/util/mapbox.cpp b/src/util/mapbox.cpp
new file mode 100644
index 0000000000..277b647f34
--- /dev/null
+++ b/src/util/mapbox.cpp
@@ -0,0 +1,44 @@
+#include <mbgl/util/mapbox.hpp>
+
+#include <stdexcept>
+
+namespace mbgl {
+namespace util {
+namespace mapbox {
+
+const std::string mapbox = "mapbox://";
+
+std::string normalizeURL(const std::string& url, const std::string& accessToken) {
+    if (accessToken.empty())
+        throw std::runtime_error("You must provide a Mapbox API access token for Mapbox tile sources");
+
+    return std::string("https://api.tiles.mapbox.com/v4/")
+        + url.substr(mapbox.length())
+        + "?access_token="
+        + accessToken;
+}
+
+std::string normalizeSourceURL(const std::string& url, const std::string& accessToken) {
+    if (url.compare(0, mapbox.length(), mapbox) != 0)
+        return url;
+
+    std::string result = normalizeURL(url + ".json", accessToken);
+
+    // TileJSON requests need a secure flag appended to their URLs so
+    // that the server knows to send SSL-ified resource references.
+    if (url.compare(0, 5, "https") == 0)
+        result += "&secure";
+
+    return result;
+}
+
+std::string normalizeGlyphsURL(const std::string& url, const std::string& accessToken) {
+    if (url.compare(0, mapbox.length(), mapbox) != 0)
+        return url;
+
+    return normalizeURL(url, accessToken);
+}
+
+}
+}
+}
diff --git a/src/util/transition.cpp b/src/util/transition.cpp
index c91c8019b7..e63a5c311f 100644
--- a/src/util/transition.cpp
+++ b/src/util/transition.cpp
@@ -1,5 +1,6 @@
 #include <mbgl/util/transition.hpp>
 #include <mbgl/util/unitbezier.hpp>
+#include <mbgl/util/interpolate.hpp>
 #include <mbgl/platform/platform.hpp>
 
 namespace mbgl { namespace util {
@@ -8,71 +9,18 @@ UnitBezier ease(0, 0, 0.25, 1);
 
 transition::~transition() {}
 
-double transition::interpolateDouble(double from, double to, double t) const {
-    return from + (to - from) * t;
-}
-
-float transition::interpolateFloat(float from, float to, double t) const {
-    return from + (to - from) * (float)t;
-}
-
-mbgl::Color transition::interpolateColor(mbgl::Color from, mbgl::Color to, double t) const {
-    return {{ interpolateFloat(from[0], to[0], t),
-              interpolateFloat(from[1], to[1], t),
-              interpolateFloat(from[2], to[2], t),
-              interpolateFloat(from[3], to[3], t) }};
-}
-
-std::array<float, 2> transition::interpolateFloatArray(std::array<float, 2> from, std::array<float, 2> to, double t) const {
-    return {{ interpolateFloat(from[0], to[0], t), interpolateFloat(from[1], to[1], t) }};
-}
-
-template <>
-transition::state ease_transition<double>::update(timestamp now) const {
-    float t = progress(now);
-    if (t >= 1) {
-        value = to;
-        return complete;
-    } else {
-        value = interpolateDouble(from, to, ease.solve(t, 0.001));
-        return running;
-    }
-}
-
-template <>
-transition::state ease_transition<mbgl::Color>::update(timestamp now) const {
+template <typename T>
+transition::state ease_transition<T>::update(timestamp now) const {
     float t = progress(now);
     if (t >= 1) {
         value = to;
         return complete;
     } else {
-        value = interpolateColor(from, to, ease.solve(t, 0.001));
+        value = interpolate(from, to, ease.solve(t, 0.001));
         return running;
     }
 }
 
-template <>
-transition::state ease_transition<float>::update(timestamp now) const {
-    float t = progress(now);
-    if (t >= 1) {
-        value = to;
-        return complete;
-    } else {
-        value = interpolateFloat(from, to, ease.solve(t, 0.001));
-        return running;
-    }
-}
-
-template <>
-transition::state ease_transition<std::array<float, 2>>::update(timestamp now) const {
-    float t = progress(now);
-    if (t >= 1) {
-        value = to;
-        return complete;
-    } else {
-        value = interpolateFloatArray(from, to, ease.solve(t, 0.001));
-        return running;
-    }
-}
+template class ease_transition<double>;
 
 }}
diff --git a/src/util/url.cpp b/src/util/url.cpp
new file mode 100644
index 0000000000..b1a721d860
--- /dev/null
+++ b/src/util/url.cpp
@@ -0,0 +1,29 @@
+#include <mbgl/util/url.hpp>
+
+#include <cctype>
+#include <iomanip>
+#include <sstream>
+#include <string>
+
+namespace mbgl {
+namespace util {
+
+std::string percentEncode(const std::string& input) {
+    std::ostringstream encoded;
+
+    encoded.fill('0');
+    encoded << std::hex;
+
+    for (auto c : input) {
+        if (std::isalnum(c) || c == '-' || c == '_' || c == '.' || c == '~') {
+            encoded << c;
+        } else {
+            encoded << '%' << std::setw(2) << int(c);
+        }
+    }
+
+    return encoded.str();
+}
+
+}
+}
diff --git a/styles/bright/style.json b/styles/bright/style.json
index d132efe982..917244648c 100644
--- a/styles/bright/style.json
+++ b/styles/bright/style.json
@@ -1,7 +1,7 @@
 {
   "version": 4,
   "sprite": "img/sprite",
-  "glyphs": "https://mapbox.s3.amazonaws.com/gl-glyphs-256/{fontstack}/{range}.pbf",
+  "glyphs": "mapbox://fontstack/{fontstack}/{range}.pbf",
   "constants": {
     "@name": "{name_en}",
     "@sans": "Open Sans Regular, Arial Unicode MS Regular",
diff --git a/styles/outdoors/style.json b/styles/outdoors/style.json
index 9abf917868..a9085c17d0 100644
--- a/styles/outdoors/style.json
+++ b/styles/outdoors/style.json
@@ -1,7 +1,7 @@
 {
   "version": 4,
   "sprite": "https://www.mapbox.com/mapbox-gl-styles/sprites/outdoors",
-  "glyphs": "https://mapbox.s3.amazonaws.com/gl-glyphs-256/{fontstack}/{range}.pbf",
+  "glyphs": "mapbox://fontstack/{fontstack}/{range}.pbf",
   "constants": {
     "@land": "rgb(244,239,225)",
     "@water": "#cdd",
diff --git a/test/headless.cpp b/test/headless.cpp
index bd84e37681..a2f58e98d9 100644
--- a/test/headless.cpp
+++ b/test/headless.cpp
@@ -47,7 +47,7 @@ TEST_P(HeadlessTest, render) {
         ResolveLocalURL(styleDoc["sprite"], styleDoc);
     }
 
-    ResolveLocalURL(styleDoc["sources"]["mapbox"]["url"], styleDoc);
+    ResolveLocalURL(styleDoc["sources"]["mapbox"]["tiles"][rapidjson::SizeType(0)], styleDoc);
 
     rapidjson::StringBuffer buffer;
     rapidjson::Writer<rapidjson::StringBuffer> writer(buffer);