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main.py
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main.py
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from __future__ import annotations
import logging
import os
import subprocess
import unicodedata
from pathlib import Path
SERENITY_SOURCE_DIR = Path(os.environ["SERENITY_SOURCE_DIR"])
EMOJI_PNG_DIR = SERENITY_SOURCE_DIR / "Base/res/emoji"
BUILD_DIR = Path("build")
EMOJI_SVG_DIR = BUILD_DIR / "emoji"
HTML_TEMPLATE = """\
<!doctype html>
<html>
<head>
<title>SerenityOS Emoji Font</title>
<link href="SerenityOS-Emoji.css" rel="stylesheet">
<style>
body {{
font-family: sans-serif;
}}
code {{
font-size: 1.2em;
}}
.emoji-grid {{
display: flex;
flex-wrap: wrap;
}}
.emoji {{
font-family: "SerenityOS Emoji";
font-size: 64px;
border: 2px solid black;
margin: 2px;
}}
</style>
</head>
<body>
<p>
<code>SerenityOS-Emoji.ttf</code> currently contains the following {emoji_count} emojis:
</p>
<section class="emoji-grid">
{emojis}
</section>
</body>
</html>
"""
logging.basicConfig(level=logging.INFO, format="%(message)s")
logger = logging.getLogger(__name__)
def convert_images() -> None:
EMOJI_SVG_DIR.mkdir(parents=True, exist_ok=True)
png_files = EMOJI_PNG_DIR.glob("*.png")
svg_files = EMOJI_SVG_DIR.glob("*.svg")
svg_to_png_file_map = {
EMOJI_SVG_DIR
/ png_file.name.replace("U+", "").replace(".png", ".svg"): png_file
for png_file in png_files
# Skip PUA emojis, they're too large and take forever to process
# with the naively vectorized images. It's possible to include them
# in the font though.
if not any(
unicodedata.category(chr(int(code_point, 16))) == "Co"
for code_point in png_file.stem.replace("U+", "").split("_")
)
}
missing_svg_files = sorted(set(svg_to_png_file_map.keys()) - set(svg_files))
for i, svg_file in enumerate(missing_svg_files):
png_file = svg_to_png_file_map[svg_file]
logger.info(f"[{i + 1}/{len(missing_svg_files)}] Converting {png_file.name}")
subprocess.call(["python3", "pixart2svg.py", str(png_file), str(svg_file)])
def build_font(emoji_svg_paths: list[str]) -> None:
subprocess.call(
[
"nanoemoji",
"--family",
"SerenityOS Emoji",
"--output_file",
"SerenityOS-Emoji.ttf",
"--color_format",
"glyf_colr_1",
*emoji_svg_paths,
]
)
def build_html_test_file(emoji_svg_paths: list[str]) -> None:
(BUILD_DIR / "index.html").write_text(
HTML_TEMPLATE.format(
emoji_count=len(emoji_svg_paths),
emojis="\n".join(
"".join(
[
" ",
'<span class="emoji">',
*(
chr(int(code_point, 16))
for code_point in Path(file).stem.split("_")
),
"</span>",
]
)
for file in emoji_svg_paths
),
)
)
def main() -> None:
logger.info("Converting PNG images to SVG...")
convert_images()
logger.info("Done.")
emoji_svg_paths = sorted(str(path) for path in EMOJI_SVG_DIR.glob("*.svg"))
logger.info("Building font file...")
build_font(emoji_svg_paths)
logger.info("Done.")
logger.info("Building HTML test file...")
build_html_test_file(emoji_svg_paths)
logger.info("Done.")
if __name__ == "__main__":
main()