7e1c86f215
Replaces Smush Pro's optimisation pipeline without the grey-wash bug. CLI commands working: wp h4b-img status wp h4b-img optimise --id=<n> wp h4b-img bulk wp h4b-img rescue Verified on dev.rds.ink: - ICC profile preservation works (the Smush-bug fix) - Bulk: 20 attachments → 487 KB saved (10.4%), 0 errors - Rescue: end-to-end mechanism verified on WorkingAsOne_horse fixture - WebP synchronous, AVIF queued via WP-Cron - Originals backed up to wp-content/h4b-img-originals/ See CHANGELOG.md for details + ../DESIGN-h4b-image-optim.md for architecture. Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
h4b-image-optim
ICC-safe image optimisation with WebP + AVIF generation for WordPress. Replaces Smush Pro without the grey-wash bug. No CDN.
Status: v0.1.0 MVP — under active development. Tested on AlmaLinux 9 + PHP 8.4 + Imagick 3.8.1.
Why this exists
Smush Pro's Ultra mode (lossy=2 + strip_exif=true) destroyed 1,345 high-contrast B&W ink art JPGs on rds.ink by stripping ICC profiles and applying aggressive JPEG quantisation. The diagnosis, rescue, and a full design document are in the sibling image-rescue/ directory.
This plugin is the structural fix: an in-house Smush replacement that never strips ICC profiles, with full source-code ownership and zero CDN dependency.
Features (v0.1)
- ✅ JPEG / PNG optimisation in place (Imagick + jpegoptim/pngquant)
- ✅ ICC profile preservation (the Smush-bug fix)
- ✅ EXIF orientation applied + GPS stripped for privacy
- ✅ WebP sibling generation (cwebp)
- ✅ AVIF sibling generation (avifenc, queued via WP-Cron)
- ✅ Backup of originals to
wp-content/h4b-img-originals/, pruned after 90 days - ✅ WP-CLI:
wp h4b-img status,wp h4b-img optimise --id=<n> - 🔜 Bulk processing (
wp h4b-img bulk) - 🔜 Picture-tag rewriting + .htaccess fallback
- 🔜 Admin settings page
- 🔜 Migration command from Smush metadata
Required system tools
Install on AlmaLinux 9:
dnf install --setopt=install_weak_deps=False \
libwebp-tools jpegoptim libjpeg-turbo-utils libavif-tools pngquant
Verify with:
wp h4b-img status
Settings (v0.1 — set via WP-CLI)
wp option get h4b_image_optim_settings
wp option patch update h4b_image_optim_settings jpeg_quality 90
Key defaults:
| Setting | Default | Why |
|---|---|---|
jpeg_quality |
85 | Industry standard; visually lossless for art |
jpeg_chroma_subsampling |
4:4:4 |
The Smush-bug fix — no chroma loss on edges |
preserve_icc_profile |
true |
Critical — never strip ICC |
generate_webp |
true |
Always make .webp sibling |
generate_avif |
true |
Always make .avif sibling (background) |
avif_async |
true |
Don't block upload UI |
backup_originals |
true |
Always |
backup_prune_days |
90 |
Cron prunes after 90 days |
resize_max_width |
2560 |
Hard cap on uploaded image size |
Uninstall
uninstall.php deletes the settings option and clears cron hooks. It does not delete backup files or .webp/.avif siblings — those are user data.
License
GPL-2.0-or-later.