Merge pull request #409 from googlefonts/ec

Add noflags and emojicompat variants

about_fonts.py

@@ -0,0 +1,37 @@
+"""Prints info about emoji fonts."""
+
+from fontTools import ttLib
+from pathlib import Path
+import sys
+
+
+NAME_ID_VERSION = 5
+
+
+def name(font, name_id):
+    return ",".join(n.toUnicode() for n in font["name"].names if n.isUnicode() and n.nameID == name_id)
+
+
+def main():
+    font_files = sorted(p for p in (Path(__file__).parent / "fonts").iterdir() if p.suffix == ".ttf")
+    max_name_len = max(len(p.name) for p in font_files)
+
+    for font_file in font_files:
+        font = ttLib.TTFont(font_file)
+
+        font_type = []
+        if "CBDT" in font:
+            font_type.append("CBDT")
+        if "COLR" in font:
+            font_type.append("COLR")
+        if "meta" in font and "Emji" in font["meta"].data:
+            font_type.append("EmojiCompat")
+        font_type.append(f"fontRevision:{font['head'].fontRevision:.3f}")
+        font_type.append(name(font, NAME_ID_VERSION))
+        font_type = ", ".join(font_type)
+
+        print(f"{font_file.name:{max_name_len + 1}} {font_type}")
+
+
+if __name__ == '__main__':
+  main()

drop_flags.py

@@ -0,0 +1,48 @@
+"""Removes regional indicators from a font."""
+
+from fontTools import subset
+from fontTools import ttLib
+import functools
+from pathlib import Path
+import sys
+from typing import Set
+
+
+def codepoints(font: ttLib.TTFont) -> Set[int]:
+    unicode_cmaps = (t.cmap.keys() for t in font['cmap'].tables if t.isUnicode())
+    return functools.reduce(lambda acc, u: acc | u, unicode_cmaps, set())
+
+
+def is_regional_indicator(cp: int) -> bool:
+    return 0x1F1E6 <= cp <= 0x1F1FF
+
+
+def main(argv):
+    for font_file in sorted(argv[1:]):
+        font_file = Path(font_file)
+        assert font_file.is_file(), font_file
+        noflags_file = font_file.with_stem(font_file.stem + "-noflags")
+
+        if noflags_file.is_file():
+            print(font_file, "already has", noflags_file, "; nop")
+            continue
+
+        font = ttLib.TTFont(font_file)
+
+        cps = codepoints(font)
+        cps_without_flags = {cp for cp in cps if not is_regional_indicator(cp)}
+
+        if cps == cps_without_flags:
+            print(font_file, "has no regional indicators")
+            continue
+
+        subsetter = subset.Subsetter()
+        subsetter.populate(unicodes=cps_without_flags)
+        subsetter.subset(font)
+
+        font.save(noflags_file)
+        print(font_file, "=>" , noflags_file)
+
+
+if __name__ == '__main__':
+  main(sys.argv)

fix_colr_font_revision.py

@@ -0,0 +1,36 @@
+"""Set COLRv1 fontRevision from CBDT.
+
+Used for bugfix, should fix to set properly on build instead.
+"""
+
+from fontTools import ttLib
+from pathlib import Path
+import sys
+
+
+NAME_ID_VERSION = 5
+
+
+def name(font, name_id):
+    return ",".join(n.toUnicode() for n in font["name"].names if n.isUnicode() and n.nameID == name_id)
+
+
+def main():
+    colr_font_files = sorted(p for p in (Path(__file__).parent / "fonts").iterdir() if p.name.startswith("Noto-COLRv1"))
+
+    for colr_font_file in colr_font_files:
+        cbdt_font_file = colr_font_file.with_stem(colr_font_file.stem.replace("Noto-COLRv1", "NotoColorEmoji"))
+
+        colr_font = ttLib.TTFont(colr_font_file)
+        cbdt_font = ttLib.TTFont(cbdt_font_file)
+
+        assert "CBDT" in cbdt_font
+        assert "COLR" in colr_font
+
+        colr_font["head"].fontRevision = cbdt_font["head"].fontRevision
+
+        colr_font.save(colr_font_file)
+
+
+if __name__ == '__main__':
+  main()