Allow specifying multiple fonts or font families for local font rendering

CHANGELOG.md

@@ -26,10 +26,18 @@
 
   By default, the source is not volatile.
 
-### Bug fixes
+- [ios, macos] Allow specifying multiple fonts or font families for local font rendering ([#16253](https://github.com/mapbox/mapbox-gl-native/pull/16253))
+
+  By default, CJK characters are now set in the font specified by the `text-font` layout property. If the named font is not installed on the device or bundled with the application, the characters are set in one of the fallback fonts passed into the `localFontFamily` parameter of `mbgl::Renderer::Renderer()` and `mbgl::MapSnapshotter::MapSnapshotter()`. This parameter can now contain a list of font family names, font display names, and font PostScript names, each name separated by a newline.
+
+### 🐞 Bug fixes
 
 - [ios, macos] Fixed error receiving local file URL response ([#16428](https://github.com/mapbox/mapbox-gl-native/pull/16428))
 
+- [ios, macos] Corrected metrics of locally rendered fonts ([#16253](https://github.com/mapbox/mapbox-gl-native/pull/16253))
+
+  CJK characters are now laid out according to the font, so fonts with nonsquare glyphs have the correct kerning. This also fixes an issue where the baseline for CJK characters was too low compared to non-CJK characters.
+
 ## maps-v1.6.0-rc.1
 
 ### ✨ New features
@@ -205,7 +213,6 @@
 
 - When feature is exactly on the geometry boundary, `within` expression returns inconsistent values for different zoom levels  ([#16301](https://github.com/mapbox/mapbox-gl-native/issues/16301))
 
-
 ## maps-v1.3.0 (2020.02-relvanillashake)
 
 ### 🐞 Bug fixes

include/mbgl/util/constants.hpp

@@ -66,6 +66,9 @@ constexpr uint32_t DEFAULT_MAXIMUM_CONCURRENT_REQUESTS = 20;
 
 constexpr uint8_t TERRAIN_RGB_MAXZOOM = 15;
 
+constexpr const char* LAST_RESORT_ALPHABETIC_FONT = "Open Sans Regular";
+constexpr const char* LAST_RESORT_PAN_UNICODE_FONT = "Arial Unicode MS Regular";
+
 } // namespace util
 
 namespace debug {