From af3f88808a5a867fdc96c8206e96619e0004c6d2 Mon Sep 17 00:00:00 2001
From: Tan Duong <tan@humanly.io>
Date: Thu, 11 Sep 2025 20:32:59 +0700
Subject: [PATCH] support Japanese unicode

---
 lib/mudbrick/font.ex | 5 ++++-
 test/font_test.exs   | 9 +++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/mudbrick/font.ex b/lib/mudbrick/font.ex
index 404819c..0f4c994 100644
--- a/lib/mudbrick/font.ex
+++ b/lib/mudbrick/font.ex
@@ -116,8 +116,11 @@ defmodule Mudbrick.Font do
         offset = normal_width - width_when_kerned
         {Mudbrick.to_hex(glyph_id), offset}
 
-      {glyph_id, {:std_width, _, _, _width, _}} ->
+      {glyph_id, {:std_width, _, _, _, _}} ->
         Mudbrick.to_hex(glyph_id)
+
+        {glyph_id, {:pos, _, _, _, _}} ->
+          Mudbrick.to_hex(glyph_id)
     end)
   end
 
diff --git a/test/font_test.exs b/test/font_test.exs
index bc352fe..2139aef 100644
--- a/test/font_test.exs
+++ b/test/font_test.exs
@@ -103,6 +103,15 @@ defmodule Mudbrick.FontTest do
     end
   end
 
+  test "kerned handles Japanese with :pos tuple" do
+    doc = Mudbrick.new(fonts: %{bodoni: bodoni_regular()})
+    font = Document.find_object(doc, &match?(%Font{}, &1)).value
+    
+    result = Font.kerned(font, "日本語")
+    assert is_list(result)
+    assert Enum.all?(result, &(is_binary(&1) or is_tuple(&1)))
+  end
+
   describe "serialisation" do
     test "with descendant" do
       assert %Font{