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build_emoji: Use clean emoji sheets without Apple fallback images.

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Signed-off-by: Anders Kaseorg <anders@zulip.com>
This commit is contained in:
Anders Kaseorg
2025-10-01 12:49:58 -07:00
committed by Tim Abbott
parent 85c94599c5
commit 80b9cffb3d
1 changed files with 17 additions and 7 deletions
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14
tools/setup/emoji/build_emoji
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@@ -6,6 +6,7 @@ import os
import shutil import shutil
import subprocess import subprocess
import sys import sys
import tempfile
from collections.abc import Iterator, Sequence from collections.abc import Iterator, Sequence
from typing import Any from typing import Any
@@ -312,16 +313,25 @@ def setup_emoji_farms(cache_path: str, emoji_data: list[dict[str, Any]]) -> None
f"emoji-datasource-{emojiset}", f"emoji-datasource-{emojiset}",
"img", "img",
emojiset, emojiset,
"sheets-256", "sheets-clean",
"64.png", "64.png",
) )
sheet_dst = os.path.join(TARGET_EMOJI_SHEETS, f"{emojiset}.webp") sheet_dst = os.path.join(TARGET_EMOJI_SHEETS, f"{emojiset}.webp")
with tempfile.TemporaryDirectory() as tmpdir:
# First quantize the image to 256 colors (like sheets-256 in
# emoji-datasource); libvips can only do this when saving to a PNG.
quantized = os.path.join(tmpdir, "quantized.png")
subprocess.check_call(
["vips", "copy", sheet_src, f"{quantized}[palette,dither=0,effort=10]"]
)
# From libwebp: [Q is] between 0 and 100. For lossy, 0 gives # From libwebp: [Q is] between 0 and 100. For lossy, 0 gives
# the smallest size and 100 the largest. For lossless, this # the smallest size and 100 the largest. For lossless, this
# parameter is the amount of effort put into the # parameter is the amount of effort put into the
# compression: 0 is the fastest but gives larger files # compression: 0 is the fastest but gives larger files
# compared to the slowest, but best, 100. # compared to the slowest, but best, 100.
subprocess.check_call(["vips", "copy", sheet_src, f"{sheet_dst}[lossless=true,Q=100]"]) subprocess.check_call(["vips", "copy", quantized, f"{sheet_dst}[lossless,Q=100]"])
# Set up standard emoji sets. # Set up standard emoji sets.
for emojiset in ["google", "twitter"]: for emojiset in ["google", "twitter"]: