wadamesh/scripts/build/gen-touch-fonts.sh

#!/usr/bin/env bash
set -euo pipefail

usage() {
  echo "usage: $0 [--check]" >&2
}

mode=write
if [[ ${1:-} == "--check" ]]; then
  mode=check
  shift
fi
if [[ $# -ne 0 ]]; then
  usage
  exit 2
fi

repo_root=$(cd "$(dirname "${BASH_SOURCE[0]}")/../.." && pwd)
work_dir=$(mktemp -d "${TMPDIR:-/tmp}/wadamesh-touch-fonts.XXXXXX")
trap 'rm -rf "$work_dir"' EXIT

download() {
  local url=$1
  local output=$2
  local expected=$3

  curl -fsSL --retry 3 "$url" -o "$output"
  verify_sha256 "$output" "$expected"
}

verify_sha256() {
  local path=$1
  local expected=$2
  local actual

  if command -v shasum >/dev/null 2>&1; then
    actual=$(shasum -a 256 "$path" | awk '{print $1}')
  else
    actual=$(sha256sum "$path" | awk '{print $1}')
  fi

  if [[ $actual != "$expected" ]]; then
    echo "SHA-256 mismatch for $path" >&2
    echo "expected: $expected" >&2
    echo "actual:   $actual" >&2
    exit 1
  fi
}

montserrat="$work_dir/Montserrat-Medium.ttf"
noto_sans_zip="$work_dir/NotoSans-v2.015.zip"
noto_sans="$work_dir/NotoSans-Regular.ttf"
noto_arabic_zip="$work_dir/NotoSansArabicUI-v2.011.zip"
noto_arabic="$work_dir/NotoSansArabicUI-Regular.ttf"
noto_symbols_zip="$work_dir/NotoSansSymbols2-v2.008.zip"
noto_symbols="$work_dir/NotoSansSymbols2-Regular.ttf"

download \
  "https://raw.githubusercontent.com/lvgl/lvgl/v8.4.0/scripts/built_in_font/Montserrat-Medium.ttf" \
  "$montserrat" \
  "421f26b23e2be6b98373d32acd3cb2897b154d4bf0a77d26534ce476e4cbed53"
download \
  "https://github.com/notofonts/latin-greek-cyrillic/releases/download/NotoSans-v2.015/NotoSans-v2.015.zip" \
  "$noto_sans_zip" \
  "0c34df072a3fa7efbb7cbf34950e1f971a4447cffe365d3a359e2d4089b958f5"
download \
  "https://github.com/notofonts/arabic/releases/download/NotoSansArabicUI-v2.011/NotoSansArabicUI-v2.011.zip" \
  "$noto_arabic_zip" \
  "f775ee259557195721466e99ec0316bbcd897f0429e25955f5d9582ca1202ce7"
download \
  "https://github.com/notofonts/symbols/releases/download/NotoSansSymbols2-v2.008/NotoSansSymbols2-v2.008.zip" \
  "$noto_symbols_zip" \
  "346c930bbe8eb946701a05c54e9c11a2094dee1d93c387bf1771c0a3e335688f"

unzip -p "$noto_sans_zip" \
  "NotoSans/hinted/ttf/NotoSans-Regular.ttf" > "$noto_sans"
unzip -p "$noto_arabic_zip" \
  "NotoSansArabicUI/hinted/ttf/NotoSansArabicUI-Regular.ttf" > "$noto_arabic"
unzip -p "$noto_symbols_zip" \
  "NotoSansSymbols2/hinted/ttf/NotoSansSymbols2-Regular.ttf" > "$noto_symbols"

verify_sha256 "$noto_sans" \
  "478c558ea716033cd60c03438f628dfa75694dcf6b5f6d505a2f05fd2b4f3823"
verify_sha256 "$noto_arabic" \
  "c56275c744ded6ff6df13de04963e6174632f0405a54a83f44d0fe5395f45ae6"
verify_sha256 "$noto_symbols" \
  "c4a0a80f0041ce4be81e2478faad22776d23edb98ae3f0d19bd37044820ecf9d"

font_conv=(npx --yes lv_font_conv@1.5.3)
if [[ $("${font_conv[@]}" --version) != "1.5.3" ]]; then
  echo "lv_font_conv 1.5.3 is required" >&2
  exit 1
fi

symbols='•·–—‘’“”…°±×÷€£¥§©®™½¼¾℃℉'
# Arrows (U+2190-2193) and the comparison operators (U+2260/2264/2265) are NOT in
# Noto Sans. Asking $noto_sans for them, as this script did until #261, silently
# produced nothing — lv_font_conv omits a glyph the source font lacks instead of
# failing — so "Settings → Quick replies" drew a tofu box in EVERY language, at
# 137 sites in the UI and in all 13 .lang files. (Noto Sans Symbols 2 does not
# have them either; verified, it errors outright when asked.)
#
# Montserrat DOES have all seven, and is already the primary UI face and the first
# --font here, so cutting them from it costs no new dependency or licence line and
# makes the arrow match the text around it. lv_font_conv takes the FIRST font that
# supplies a codepoint, so listing these on Montserrat wins while every other
# symbol still comes from Noto Sans below, unchanged.
symbols_fallback='→←↑↓≠≤≥'
stage="$work_dir/stage"
mkdir -p "$stage/src/ui-touch"

normalise() {
  local raw=$1
  local output=$2
  local sources=$3
  local guard=${4:-}

  awk -v sources="$sources" -v guard="$guard" '
    BEGIN {
      if (guard != "") {
        print "#include \"device_caps.h\""
        print "#if defined(" guard ")"
        print ""
      }
    }
    /^ \* Opts:/ {
      print " * Generated by scripts/build/gen-touch-fonts.sh with lv_font_conv 1.5.3"
      print " * Sources: " sources
      next
    }
    /^#ifdef LV_LVGL_H_INCLUDE_SIMPLE$/ {
      print "#if 1"
      next
    }
    { print }
    END {
      if (guard != "") {
        print ""
        print "#endif /* " guard " */"
      }
    }
  ' "$raw" > "$output"
  perl -0pi -e 's/\s+\z/\n/' "$output"
}

generate_extras() {
  local size=$1
  local guard=${2:-}
  local raw="$work_dir/extras_font_${size}.c"
  local output="$stage/src/ui-touch/extras_font_${size}.c"

  "${font_conv[@]}" \
    --size "$size" \
    --bpp 4 \
    --format lvgl \
    --font "$montserrat" \
    -r 0x00C0-0x00FF \
    -r 0x0100-0x017F \
    -r 0x0400-0x04FF \
    --symbols "$symbols_fallback" \
    --font "$noto_sans" \
    -r 0x0370-0x03FF \
    --symbols "$symbols" \
    --font "$noto_arabic" \
    -r 0x0600-0x06FF \
    -r 0xFE70-0xFEFF \
    --lv-font-name "extras_${size}" \
    -o "$raw"

  normalise "$raw" "$output" \
    "Montserrat Medium (LVGL v8.4.0), Noto Sans 2.015, Noto Sans Symbols 2.008, Noto Sans Arabic UI 2.011" \
    "$guard"
}

generate_latin_extras() {
  local size=$1
  local raw="$work_dir/extras_lat_${size}.c"
  local output="$stage/src/ui-touch/extras_lat_${size}.c"

  "${font_conv[@]}" \
    --size "$size" \
    --bpp 4 \
    --format lvgl \
    --font "$montserrat" \
    -r 0x00C0-0x00FF \
    -r 0x0100-0x017F \
    --lv-font-name "extras_lat_${size}" \
    -o "$raw"

  normalise "$raw" "$output" \
    "Montserrat Medium (LVGL v8.4.0)" \
    "HAS_TANMATSU"
}

generate_star() {
  local size=$1
  local raw="$work_dir/star_font_${size}.c"
  local output="$stage/src/ui-touch/star_font_${size}.c"

  "${font_conv[@]}" \
    --size "$size" \
    --bpp 4 \
    --no-compress \
    --format lvgl \
    --font "$noto_symbols" \
    -r 0x2605 \
    --lv-font-name "star_font_${size}" \
    -o "$raw"

  normalise "$raw" "$output" \
    "Noto Sans Symbols 2.008"
}

for size in 12 14 16; do
  generate_extras "$size"
done
for size in 20 24; do
  generate_extras "$size" "TLORA_PAGER"
done
for size in 20 24 28; do
  generate_latin_extras "$size"
done
for size in 14 28; do
  generate_star "$size"
done

files=(
  src/ui-touch/extras_font_12.c
  src/ui-touch/extras_font_14.c
  src/ui-touch/extras_font_16.c
  src/ui-touch/extras_font_20.c
  src/ui-touch/extras_font_24.c
  src/ui-touch/extras_lat_20.c
  src/ui-touch/extras_lat_24.c
  src/ui-touch/extras_lat_28.c
  src/ui-touch/star_font_14.c
  src/ui-touch/star_font_28.c
)

if [[ $mode == check ]]; then
  stale=0
  for file in "${files[@]}"; do
    if ! cmp -s "$stage/$file" "$repo_root/$file"; then
      echo "stale generated font: $file" >&2
      stale=1
    fi
  done
  exit "$stale"
fi

for file in "${files[@]}"; do
  cp "$stage/$file" "$repo_root/$file"
done

echo "Regenerated ${#files[@]} touch font assets."