feat: 拼音字母选择

tools/font-tools/extract_pinyin.py

@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+"""从 ToneOZ-Pinyin-WenKai-Regular.ttf 中提取拼音/字母/数字字符，生成新的字体文件。"""
+
+from fontTools.ttLib import TTFont
+from fontTools.subset import Subsetter
+from pathlib import Path
+
+BASE = Path(__file__).resolve().parent
+INPUT = BASE / "input-fonts" / "ToneOZ-Pinyin-WenKai-Regular.ttf"
+OUTPUT = BASE / "output-fonts" / "ToneOZ-Pinyin-Kai-Regular.ttf"
+
+# Unicode 码点范围
+RANGES = [
+    (0x0020, 0x007E),  # 基本 ASCII（字母、数字、标点）
+    (0x00C0, 0x00FF),  # 拉丁字母-1 补充
+    (0x0100, 0x017F),  # 拉丁字母扩展 A
+    (0x01D6, 0x01DC),  # ü 的四个声调变体
+]
+
+
+def build_unicodes():
+    codepoints = set()
+    for start, end in RANGES:
+        for cp in range(start, end + 1):
+            codepoints.add(cp)
+    return sorted(codepoints)
+
+
+def main():
+    font = TTFont(INPUT)
+    unicodes = build_unicodes()
+
+    # 使用 fonttools Subsetter 提取指定字符
+    sub = Subsetter()
+    sub.populate(unicodes=unicodes)
+    sub.subset(font)
+
+    OUTPUT.parent.mkdir(parents=True, exist_ok=True)
+    font.save(OUTPUT)
+    print(f"提取完成: {OUTPUT}")
+    print(f"包含 {len(unicodes)} 个码点")
+
+    # 输出范围统计
+    for start, end in RANGES:
+        name = f"U+{start:04X}-U+{end:04X}"
+        glyphs_in_range = sum(
+            1 for cp in range(start, end + 1) if cp in set(unicodes)
+        )
+        print(f"  {name}: {glyphs_in_range} 个字符")
+
+
+if __name__ == "__main__":
+    main()