diff --git a/src/pixel_font_knife/glyph_file_util.py b/src/pixel_font_knife/glyph_file_util.py
index 8252a80..e447562 100644
--- a/src/pixel_font_knife/glyph_file_util.py
+++ b/src/pixel_font_knife/glyph_file_util.py
@@ -109,3 +109,32 @@ def load_context(root_dir: str | PathLike[str]) -> dict[int, GlyphFlavorGroup]:
                     raise RuntimeError(f"default flavor already exists: '{glyph_file.file_path}' -> '{flavor_group[''].file_path}'")
                 flavor_group[''] = glyph_file
     return context
+
+
+def get_character_mapping(
+        context: dict[int, GlyphFlavorGroup],
+        flavor: str = '',
+        fallback_default: bool = True,
+) -> dict[int, str]:
+    character_mapping = {}
+    for code_point, flavor_group in context.items():
+        if code_point < 0:
+            continue
+        glyph_file = flavor_group.get_file(flavor, fallback_default)
+        character_mapping[code_point] = glyph_file.glyph_name
+    return character_mapping
+
+
+def get_glyph_sequence(
+        context: dict[int, GlyphFlavorGroup],
+        flavors: list[str] | None = None,
+        fallback_default: bool = True,
+) -> list[GlyphFile]:
+    glyph_sequence = []
+    flavor_group_sequence = sorted(context.items())
+    for flavor in [''] if flavors is None else flavors:
+        for code_point, flavor_group in flavor_group_sequence:
+            glyph_file = flavor_group.get_file(flavor, fallback_default)
+            if glyph_file not in glyph_sequence:
+                glyph_sequence.append(glyph_file)
+    return glyph_sequence
diff --git a/tests/test_glyph_file_util.py b/tests/test_glyph_file_util.py
index 8e7a074..d11bdef 100644
--- a/tests/test_glyph_file_util.py
+++ b/tests/test_glyph_file_util.py
@@ -75,6 +75,9 @@ def test_context(glyphs_dir: Path):
     assert 0x6AA4 in context
     assert 0x4E10 not in context
 
+    group_notdef = context[-1]
+    assert len(group_notdef) == 1
+
     group_4e11 = context[0x4E11]
     assert len(group_4e11) == 2
     assert '' in group_4e11
@@ -86,3 +89,20 @@ def test_context(glyphs_dir: Path):
     assert '' in group_6aa4
     assert group_6aa4.get_file('zh_hk') is group_6aa4.get_file('zh_tw')
     assert group_6aa4.get_file('zh_tr') is group_6aa4.get_file('ko')
+
+    assert glyph_file_util.get_character_mapping(context) == {
+        0x4E11: '4E11',
+        0x6AA4: '6AA4',
+    }
+    assert glyph_file_util.get_character_mapping(context, 'zh_cn') == {
+        0x4E11: '4E11-ZH_CN',
+        0x6AA4: '6AA4',
+    }
+
+    assert glyph_file_util.get_glyph_sequence(context, ['', 'zh_cn', 'zh_hk']) == [
+        GlyphFile.load(glyphs_dir.joinpath('context', 'notdef.png')),
+        GlyphFile.load(glyphs_dir.joinpath('context', '4E11.png')),
+        GlyphFile.load(glyphs_dir.joinpath('context', '6AA4.png')),
+        GlyphFile.load(glyphs_dir.joinpath('context', '4E11 zh_cn.png')),
+        GlyphFile.load(glyphs_dir.joinpath('context', '6AA4 zh_hk,zh_tw.png')),
+    ]