import live www.sillylaird.ca webrootHEADmain

1 files changed, 93 insertions, 0 deletions

diff --git a/tools/optimize_images.sh b/tools/optimize_images.sh
new file mode 100755
index 0000000..6538448
--- /dev/null
+++ b/tools/optimize_images.sh
@@ -0,0 +1,93 @@
+#!/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")"