blob: 6538448fb7fd84fdbb178accfa8806ef4df4f1c6 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
|
#!/usr/bin/env bash
# Optimize site images in place. Lossy but visually conservative.
#
# - JPEG : strip metadata, progressive, quality 82
# - PNG : strip metadata, max zlib recompression (lossless)
# - GIF : gifsicle -O3 (lossless frame optimization); --lossy on big ones
# - A short list of oversized tile PNGs is downscaled to a sane max width,
# since the layout never displays them larger than ~320px.
#
# Originals are tarred to "$BACKUP_DIR" before anything is touched.
# Re-running is safe: already-small files are left alone.
#
# Env:
# BACKUP_DIR where to write the pre-run tarball (default /tmp)
# DRY_RUN=1 print what would change, touch nothing
set -u
cd "$(dirname "$0")/.."
ROOT="$(pwd)"
BACKUP_DIR="${BACKUP_DIR:-/tmp}"
DRY="${DRY_RUN:-0}"
have() { command -v "$1" >/dev/null 2>&1; }
have convert || { echo "need ImageMagick (convert)"; exit 1; }
# Tile PNGs the layout caps at ~320px wide; 640 keeps a 2x retina buffer.
# Section heroes are capped wider (display size rarely exceeds ~960px).
declare -A MAXW=(
[assets/img/runescape.png]=640
[assets/img/soldierfront.png]=640
[assets/img/multibox.png]=640
[assets/img/stepmania.png]=640
[startpage/videogame.jpg]=720
[computers/laptop-compaq.jpg]=960
[gaming/runescape/runescape.png]=640
)
fmt() { numfmt --to=iec "$1" 2>/dev/null || echo "$1"; }
size() { stat -c%s "$1"; }
if [ "$DRY" != "1" ]; then
ts="$(date +%Y%m%d-%H%M%S)"
tar -czf "$BACKUP_DIR/images-pre-optimize-$ts.tar.gz" \
assets/img images startpage computers gaming vblog mstartpage 2>/dev/null \
&& echo "backup: $BACKUP_DIR/images-pre-optimize-$ts.tar.gz"
fi
total_before=0; total_after=0
process() {
local f="$1" before after; before="$(size "$f")"; total_before=$((total_before+before))
local tmp="$f.opt.$$"
local fl
fl="$(printf '%s' "$f" | tr '[:upper:]' '[:lower:]')"
case "$fl" in
*.jpg|*.jpeg)
convert "$f" -strip -interlace Plane -quality 82 "$tmp" 2>/dev/null ;;
*.png)
local w="${MAXW[$f]:-}"
[ -z "$w" ] && w="${MAXW[$fl]:-}"
if [ -n "$w" ]; then
convert "$f" -strip -resize "${w}x${w}>" -define png:compression-level=9 -define png:compression-filter=5 "$tmp" 2>/dev/null
else
convert "$f" -strip -define png:compression-level=9 -define png:compression-filter=5 "$tmp" 2>/dev/null
fi ;;
*.gif)
if ! have gifsicle; then total_after=$((total_after+before)); return; fi
if [ "$before" -gt 400000 ]; then
gifsicle -O3 --lossy=60 "$f" -o "$tmp" 2>/dev/null
else
gifsicle -O3 "$f" -o "$tmp" 2>/dev/null
fi ;;
*) total_after=$((total_after+before)); return ;;
esac
if [ ! -s "$tmp" ]; then rm -f "$tmp"; total_after=$((total_after+before)); return; fi
after="$(size "$tmp")"
if [ "$after" -lt "$before" ]; then
if [ "$DRY" = "1" ]; then
printf ' %-40s %8s -> %8s\n' "$f" "$(fmt "$before")" "$(fmt "$after")"; rm -f "$tmp"
else
mv "$tmp" "$f"
fi
total_after=$((total_after+after))
else
rm -f "$tmp"; total_after=$((total_after+before))
fi
}
while IFS= read -r -d '' f; do process "$f"; done < <(
find assets/img images startpage computers gaming vblog mstartpage \
-type f \( -iname '*.jpg' -o -iname '*.jpeg' \
-o -iname '*.png' -o -iname '*.gif' \) -print0 2>/dev/null
)
echo "total: $(fmt "$total_before") -> $(fmt "$total_after")"
|
