85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
"""
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Post-nanoemoji processing of the Noto COLRv1 Emoji file.
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For now substantially based on copying from a correct bitmap build.
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"""
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from absl import app
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from fontTools import ttLib
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import map_pua_emoji
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from nototools import add_vs_cmap
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from nototools import unicode_data
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def _is_colrv1(font):
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return (
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"COLR" in font
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and font["COLR"].version == 1
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)
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def _is_cbdt(font):
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return "CBDT" in font
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def _is_compat_font(font):
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return (
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"meta" in font
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and "Emji" in font["meta"].data
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)
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def _copy_emojicompat_data(colr_font, cbdt_font):
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colr_font["meta"] = cbdt_font["meta"]
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def _set_name(name_table, nameID):
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name_table.getName(value, nameID, 3, 1, 0x409)
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def _set_name(name_table, nameID, value):
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name_table.setName(value, nameID, 3, 1, 0x409)
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def _copy_names(colr_font, cbdt_font):
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colr_font["name"] = cbdt_font["name"]
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name_table = colr_font["name"]
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assert all((n.platformID, n.platEncID, n.langID) == (3, 1, 0x409)
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for n in name_table.names), "Should only have names Android uses"
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# Amendments
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_set_name(name_table, 10, "Color emoji font using COLRv1.")
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_set_name(name_table, 11, "https://github.com/googlefonts/noto-emoji")
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_set_name(name_table, 12, "https://github.com/googlefonts/noto-emoji")
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# CBDT build step: @$(VS_ADDER) -vs 2640 2642 2695 --dstdir '.' -o "$@-with-pua-varsel" "$@-with-pua"
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def _add_vs_cmap(colr_font):
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emoji_variants = unicode_data.get_unicode_emoji_variants() | {0x2640, 0x2642, 0x2695}
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add_vs_cmap.modify_font("COLRv1 Emoji", colr_font, "emoji", emoji_variants)
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def main(argv):
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if len(argv) != 3:
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raise ValueError("Must have two args, a COLRv1 font and a CBDT emojicompat font")
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colr_font = ttLib.TTFont(argv[1])
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if not _is_colrv1(colr_font):
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raise ValueError("First arg must be a COLRv1 font")
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cbdt_font = ttLib.TTFont(argv[2])
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if not _is_cbdt(cbdt_font) or not _is_compat_font(cbdt_font):
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raise ValueError("Second arg must be a CBDT emojicompat font")
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_copy_emojicompat_data(colr_font, cbdt_font)
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_copy_names(colr_font, cbdt_font)
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# CBDT build step: @$(PYTHON) $(PUA_ADDER) "$@" "$@-with-pua"
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map_pua_emoji.add_pua_cmap_to_font(colr_font)
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_add_vs_cmap(colr_font)
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colr_font.save('fonts/Noto-COLRv1-noflags.ttf')
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if __name__ == "__main__":
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app.run(main) |