50 lines
1.5 KiB
Bash
50 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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set -euo pipefail
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ICON_FILE=${1:-Icon.icon}
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BASENAME=${2:-Icon}
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OUT_ROOT=${3:-build/icon}
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XCODE_APP=${XCODE_APP:-/Applications/Xcode.app}
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ICTOOL="$XCODE_APP/Contents/Applications/Icon Composer.app/Contents/Executables/ictool"
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if [[ ! -x "$ICTOOL" ]]; then
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ICTOOL="$XCODE_APP/Contents/Applications/Icon Composer.app/Contents/Executables/icontool"
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fi
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if [[ ! -x "$ICTOOL" ]]; then
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echo "ictool/icontool not found. Set XCODE_APP if Xcode is elsewhere." >&2
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exit 1
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fi
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ICONSET_DIR="$OUT_ROOT/${BASENAME}.iconset"
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TMP_DIR="$OUT_ROOT/tmp"
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mkdir -p "$ICONSET_DIR" "$TMP_DIR"
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MASTER_ART="$TMP_DIR/icon_art_824.png"
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MASTER_1024="$TMP_DIR/icon_1024.png"
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# Render inner art (no margin) with macOS Default appearance.
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"$ICTOOL" "$ICON_FILE" \
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--export-preview macOS Default 824 824 1 -45 "$MASTER_ART"
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# Pad to 1024x1024 with transparent border.
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sips --padToHeightWidth 1024 1024 "$MASTER_ART" --out "$MASTER_1024" >/dev/null
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# Generate required sizes.
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sizes=(16 32 64 128 256 512 1024)
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for sz in "${sizes[@]}"; do
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out="$ICONSET_DIR/icon_${sz}x${sz}.png"
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sips -z "$sz" "$sz" "$MASTER_1024" --out "$out" >/dev/null
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if [[ "$sz" -ne 1024 ]]; then
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dbl=$((sz*2))
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out2="$ICONSET_DIR/icon_${sz}x${sz}@2x.png"
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sips -z "$dbl" "$dbl" "$MASTER_1024" --out "$out2" >/dev/null
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fi
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done
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# 512x512@2x already covered by 1024; ensure it exists.
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cp "$MASTER_1024" "$ICONSET_DIR/icon_512x512@2x.png"
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iconutil -c icns "$ICONSET_DIR" -o Icon.icns
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echo "Icon.icns generated at $(pwd)/Icon.icns"
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