diff --git a/common/glfw_view.cpp b/common/glfw_view.cpp
index bcfa5f1bc..d4f896914 100644
--- a/common/glfw_view.cpp
+++ b/common/glfw_view.cpp
@@ -281,7 +281,7 @@ void show_color_debug_image(std::string name, const char *data, size_t logical_w
 }
 #endif
 
-void notify_map_change() {
+void notify_map_change(MapChange change) {
     // no-op
 }
 
diff --git a/include/llmr/map/map.hpp b/include/llmr/map/map.hpp
index 0f359b1a5..6ffb0b804 100644
--- a/include/llmr/map/map.hpp
+++ b/include/llmr/map/map.hpp
@@ -55,6 +55,7 @@ public:
     void setAppliedClasses(const std::vector<std::string> &classes);
     void toggleClass(const std::string &name);
     const std::vector<std::string> &getAppliedClasses() const;
+    void setAppliedClasses(std::vector<std::string> &class_names);
     void setDefaultTransitionDuration(uint64_t duration_milliseconds = 0);
     void setStyleJSON(std::string newStyleJSON);
     std::string getStyleJSON() const;
diff --git a/include/llmr/platform/platform.hpp b/include/llmr/platform/platform.hpp
index 220acd397..138843fee 100644
--- a/include/llmr/platform/platform.hpp
+++ b/include/llmr/platform/platform.hpp
@@ -24,6 +24,19 @@ struct Response {
     std::function<void(Response *)> callback;
 };
 
+enum MapChange : uint8_t {
+    MapChangeRegionWillChange = 0,
+    MapChangeRegionWillChangeAnimated = 1,
+    MapChangeRegionDidChange = 2,
+    MapChangeRegionDidChangeAnimated = 3,
+    MapChangeWillStartLoadingMap = 4,
+    MapChangeDidFinishLoadingMap = 5,
+    MapChangeDidFailLoadingMap = 6,
+    MapChangeWillStartRenderingMap = 7,
+    MapChangeDidFinishRenderingMap = 8,
+    MapChangeDidFinishRenderingMapFullyRendered = 9
+};
+
 // Makes an HTTP request of a URL, preferrably on a background thread, and calls a function with the
 // results in the original thread (which runs the libuv loop).
 // If the loop pointer is NULL, the callback function will be called on an arbitrary thread.
@@ -35,8 +48,8 @@ std::shared_ptr<Request> request_http(const std::string &url,
 // Cancels an HTTP request.
 void cancel_request_http(const std::shared_ptr<Request> &req);
 
-// Notifies a watcher of map x/y/scale/rotation changes.
-void notify_map_change();
+// Notifies a watcher of map changes.
+void notify_map_change(MapChange key);
 
 // Shows an alpha image with the specified dimensions in a named window.
 void show_debug_image(std::string name, const char *data, size_t width, size_t height);
diff --git a/include/llmr/style/style.hpp b/include/llmr/style/style.hpp
index c92e95a7f..b6056986f 100644
--- a/include/llmr/style/style.hpp
+++ b/include/llmr/style/style.hpp
@@ -39,6 +39,7 @@ public:
 
     void setAppliedClasses(const std::vector<std::string> &classes);
     const std::vector<std::string> &getAppliedClasses() const;
+    void setAppliedClasses(std::vector<std::string> &class_names);
     void toggleClass(const std::string &name);
 
     // Updates the styling information to reflect the current array
diff --git a/include/llmr/style/style_bucket.hpp b/include/llmr/style/style_bucket.hpp
index 1e3cb2db0..b963caba8 100644
--- a/include/llmr/style/style_bucket.hpp
+++ b/include/llmr/style/style_bucket.hpp
@@ -40,6 +40,7 @@ class StyleBucketText {
 public:
     std::string field;
     TextPathType path = TextPathType::Default;
+    TextTransformType transform = TextTransformType::Default;
     std::string font;
     float max_size = 16.0f;
     float max_width = 15.0f * 24;
diff --git a/include/llmr/style/types.hpp b/include/llmr/style/types.hpp
index 95365947f..fd862c00d 100644
--- a/include/llmr/style/types.hpp
+++ b/include/llmr/style/types.hpp
@@ -52,6 +52,13 @@ enum class TextPathType : uint8_t {
     Default = Horizontal
 };
 
+enum class TextTransformType : uint8_t {
+    None,
+    Uppercase,
+    Lowercase,
+    Default = None
+};
+
 enum class TranslateAnchorType : uint8_t {
     Map,
     Viewport,
@@ -98,6 +105,12 @@ inline TextPathType parseTextPathType(const std::string &path) {
     return TextPathType::Default;
 }
 
+inline TextTransformType parseTextTransformType(const std::string& transform) {
+    if (transform == "uppercase") return TextTransformType::Uppercase;
+    if (transform == "lowercase") return TextTransformType::Lowercase;
+    return TextTransformType::Default;
+};
+
 inline TranslateAnchorType parseTranslateAnchorType(const std::string &anchor) {
     if (anchor == "map") return TranslateAnchorType::Map;
     if (anchor == "viewport") return TranslateAnchorType::Viewport;
diff --git a/ios/mapbox-gl-cocoa b/ios/mapbox-gl-cocoa
index 359b6b6b0..8269f98e8 160000
--- a/ios/mapbox-gl-cocoa
+++ b/ios/mapbox-gl-cocoa
@@ -1 +1 @@
-Subproject commit 359b6b6b03703be2e80e9597ec13d96512dc78a0
+Subproject commit 8269f98e8bbfe8522c9440e989eb7436995f1af4
diff --git a/src/map/map.cpp b/src/map/map.cpp
index 5aa69b287..b04f88a54 100644
--- a/src/map/map.cpp
+++ b/src/map/map.cpp
@@ -397,6 +397,10 @@ const std::vector<std::string> &Map::getAppliedClasses() const {
    return style->getAppliedClasses();
 }
 
+void Map::setAppliedClasses(std::vector<std::string> &class_names) {
+    style->setAppliedClasses(class_names);
+}
+
 void Map::setDefaultTransitionDuration(uint64_t duration_milliseconds) {
     style->setDefaultTransitionDuration(duration_milliseconds);
 }
diff --git a/src/map/tile_parser.cpp b/src/map/tile_parser.cpp
index 02f1a50f5..c420f8111 100644
--- a/src/map/tile_parser.cpp
+++ b/src/map/tile_parser.cpp
@@ -19,6 +19,8 @@
 #include <llmr/util/std.hpp>
 #include <llmr/util/utf.hpp>
 
+#include <locale>
+
 #ifdef __linux__
 #include <boost/regex.hpp>
 namespace regex_impl = boost;
@@ -208,8 +210,16 @@ std::unique_ptr<Bucket> TileParser::createTextBucket(const VectorTileLayer& laye
                 return nullptr;
             VectorTileFeature feature{feature_pbf, layer};
 
-            const std::u32string string = ucs4conv.convert(
-                util::replaceTokens(properties.field, feature.properties));
+            std::string u8string = util::replaceTokens(properties.field, feature.properties);
+
+            auto& convert = std::use_facet<std::ctype<char>>(std::locale());
+            if (properties.transform == TextTransformType::Uppercase) {
+                convert.toupper(&u8string[0], &u8string[0] + u8string.size());
+            } else if (properties.transform == TextTransformType::Lowercase) {
+                convert.tolower(&u8string[0], &u8string[0] + u8string.size());
+            }
+
+            std::u32string string = ucs4conv.convert(u8string);
 
             // Loop through all characters of this text and collect unique codepoints.
             for (char32_t chr : string) {
diff --git a/src/map/transform.cpp b/src/map/transform.cpp
index c7bbbfdf7..72449956d 100644
--- a/src/map/transform.cpp
+++ b/src/map/transform.cpp
@@ -28,6 +28,8 @@ bool Transform::resize(const uint16_t w, const uint16_t h, const float ratio,
     if (final.width != w || final.height != h || final.pixelRatio != ratio ||
         final.framebuffer[0] != fb_w || final.framebuffer[1] != fb_h) {
 
+        platform::notify_map_change(platform::MapChangeRegionWillChange);
+
         current.width = final.width = w;
         current.height = final.height = h;
         current.pixelRatio = final.pixelRatio = ratio;
@@ -35,7 +37,9 @@ bool Transform::resize(const uint16_t w, const uint16_t h, const float ratio,
         current.framebuffer[1] = final.framebuffer[1] = fb_h;
         if (!canRotate() && current.angle) _setAngle(0);
         constrain(current.scale, current.y);
-        platform::notify_map_change();
+
+        platform::notify_map_change(platform::MapChangeRegionDidChange);
+
         return true;
     } else {
         return false;
@@ -76,7 +80,9 @@ void Transform::_moveBy(const double dx, const double dy, const timestamp durati
             std::make_shared<util::ease_transition<double>>(current.y, final.y, current.y, start, duration));
     }
 
-    platform::notify_map_change();
+    platform::notify_map_change(duration ?
+                                platform::MapChangeRegionDidChangeAnimated :
+                                platform::MapChangeRegionDidChange);
 }
 
 void Transform::setLonLat(const double lon, const double lat, const timestamp duration) {
@@ -294,7 +300,9 @@ void Transform::_setScaleXY(const double new_scale, const double xn, const doubl
     Bc = s / 360;
     Cc = s / (2 * M_PI);
 
-    platform::notify_map_change();
+    platform::notify_map_change(duration ?
+                                platform::MapChangeRegionDidChangeAnimated :
+                                platform::MapChangeRegionDidChange);
 }
 
 #pragma mark - Constraints
@@ -388,7 +396,9 @@ void Transform::_setAngle(double new_angle, const timestamp duration) {
             current.angle, final.angle, current.angle, start, duration));
     }
 
-    platform::notify_map_change();
+    platform::notify_map_change(duration ?
+                                platform::MapChangeRegionDidChangeAnimated :
+                                platform::MapChangeRegionDidChange);
 }
 
 double Transform::getAngle() const {
diff --git a/src/style/style.cpp b/src/style/style.cpp
index 6092280af..77d69299e 100644
--- a/src/style/style.cpp
+++ b/src/style/style.cpp
@@ -63,8 +63,8 @@ const std::vector<std::string> &Style::getAppliedClasses() const {
     return appliedClasses;
 }
 
-void Style::setAppliedClasses(const std::vector<std::string> &classes) {
-    appliedClasses = classes;
+void Style::setAppliedClasses(std::vector<std::string> &class_names) {
+    appliedClasses.swap(class_names);
     updateClasses();
 }
 
diff --git a/src/style/style_parser.cpp b/src/style/style_parser.cpp
index 645f3aa0f..e33db355e 100644
--- a/src/style/style_parser.cpp
+++ b/src/style/style_parser.cpp
@@ -890,6 +890,7 @@ void StyleParser::parseRender(JSVal value, std::shared_ptr<StyleLayer> &layer) {
 
         parseRenderProperty(value, render.field, "text-field");
         parseRenderProperty(value, render.path, "text-path", parseTextPathType);
+        parseRenderProperty(value, render.transform, "text-transform", parseTextTransformType);
         parseRenderProperty(value, render.font, "text-font");
         parseRenderProperty(value, render.max_size, "text-max-size");
         if (parseRenderProperty(value, render.max_width, "text-max-width")) {
diff --git a/test/headless.cpp b/test/headless.cpp
index 8c1dc3a26..34a3f1db7 100644
--- a/test/headless.cpp
+++ b/test/headless.cpp
@@ -15,7 +15,7 @@
 namespace llmr {
 namespace platform {
 
-void notify_map_change() {
+void notify_map_change(MapChange change) {
     // no-op
 }