initial release
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Peter Molnar
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46
readme.txt
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readme.txt
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=== wp-resized2cache ===
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Contributors: cadeyrn
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Donate link:
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Tags: image, cache, image quality,
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Requires at least: 3.0
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Tested up to: 4.4
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Stable tag: 0.1
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License: GPLv3
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License URI: http://www.gnu.org/licenses/gpl-3.0.html
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Required minimum PHP version: 5.3
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Sharpen, enchance and move resized images to cache folder
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== Description ==
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The plugin does 3 things:
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* sets the upload JPEG quality to 92%
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* applies adaptive sharpening to resized JPG files
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* moves the resized files from the default file upload location to the wp-content/cache folder (only the resized ones!)
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why:
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Because the default jpg quality is too low and because orphaned resized files used to give me a headache; this way I can clean the cache folder and regenerate the missing ones easily.
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== Requirements ==
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* minimum PHP version: 5.3
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* Imagemagick PHP plugin
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== Installation ==
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1. Upload contents of `wp-resized2cache.zip` to the `/wp-content/plugins/` directory
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2. Activate the plugin through the `Plugins` menu in WordPress
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== Changelog ==
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Version numbering logic:
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* every A. indicates BIG changes.
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* every .B version indicates new features.
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* every ..C indicates bugfixes for A.B version.
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= 0.1 =
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*2015-12-10*
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* first stable release
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194
wp-resited2cache.php
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194
wp-resited2cache.php
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<?php
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/*
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Plugin Name: wp-resized2cache
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Plugin URI: https://github.com/petermolnar/wp-resized2cache
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Description: Sharpen, enchance and move resized images to cache folder
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Version: 0.1
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Author: Peter Molnar <hello@petermolnar.eu>
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Author URI: http://petermolnar.eu/
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License: GPLv3
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Required minimum PHP version: 5.3
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*/
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/* Copyright 2015 Peter Molnar ( hello@petermolnar.eu )
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 3, as
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published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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if (!class_exists('WP_RESIZED2CACHE')):
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class WP_RESIZED2CACHE {
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const cachedir = WP_CONTENT_DIR . DIRECTORY_SEPARATOR . 'cache';
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public function __construct () {
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if (!is_dir(static::cachedir)) {
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if (!mkdir(static::cachedir)) {
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static::debug('failed to create ' . static::cachedir);
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}
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}
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add_action( 'init', array( &$this, 'init'));
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add_action( 'delete_attachment', array (&$this, 'delete_from_cache'));
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}
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public function init () {
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// set higher jpg quality
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add_filter( 'jpeg_quality', array( &$this, 'jpeg_quality' ) );
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add_filter( 'wp_editor_set_quality', array( &$this, 'jpeg_quality' ) );
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// sharpen resized images on upload
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add_filter( 'image_make_intermediate_size',array ( &$this, 'sharpen' ),10);
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}
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/**
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* called on attachment deletion and takes care of removing the moved files
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*
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*/
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public static function delete_from_cache ( $aid = null ) {
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static::debug( "DELETE is called and aid is: " . $aid );
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if ($aid === null)
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return false;
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$attachment = get_post( $aid );
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if ( static::is_post($attachment)) {
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$meta = wp_get_attachment_metadata($aid);
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if (isset($meta['sizes']) && !empty($meta['sizes'])) {
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foreach ( $meta['sizes'] as $size => $data ) {
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$file = static::cachedir . DIRECTORY_SEPARATOR . $data['file'];
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if ( isset($data['file']) && is_file($file)) {
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static::debug( " removing " . $file );
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unlink ($file);
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}
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}
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}
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}
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return $aid;
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}
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/**
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* better jpgs
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*/
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public static function jpeg_quality () {
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$jpeg_quality = (int)92;
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return $jpeg_quality;
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}
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/**
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* adaptive sharpen images w imagemagick
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*/
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static public function sharpen( $resized ) {
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if (!class_exists('Imagick')) {
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static::debug('Please install Imagick extension; otherwise this plugin will not work as well as it should.');
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}
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/*
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preg_match ( '/(.*)-([0-9]+)x([0-9]+)\.([0-9A-Za-z]{2,4})/', $resized, $details );
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* 0 => original var
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* 1 => full original file path without extension
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* 2 => resized size w
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* 3 => resized size h
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* 4 => extension
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*/
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$size = @getimagesize($resized);
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if ( !$size )
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return $resized;
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//$cachedir = WP_CONTENT_DIR . DIRECTORY_SEPARATOR . 'cache';
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$fname = basename( $resized );
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$cached = static::cachedir . DIRECTORY_SEPARATOR . $fname;
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if ( $size[2] == IMAGETYPE_JPEG && class_exists('Imagick')) {
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static::debug( "adaptive sharpen " . $resized );
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try {
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$imagick = new Imagick($resized);
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$imagick->unsharpMaskImage(0,0.5,1,0);
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$imagick->setImageFormat("jpg");
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$imagick->setImageCompression(Imagick::COMPRESSION_JPEG);
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$imagick->setImageCompressionQuality(static::jpeg_quality());
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$imagick->writeImage($cached);
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$imagick->destroy();
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}
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catch (Exception $e) {
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static::debug( 'something went wrong with imagemagick: ', $e->getMessage() );
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return $resized;
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}
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static::debug( "removing " . $resized );
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unlink ($resized);
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}
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else {
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static::debug( "moving " . $cached );
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if (copy( $resized, $cached)) {
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static::debug( "removing " . $resized );
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unlink( $resized );
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}
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else {
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static::debug( "\tmove failed, passing on this" );
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}
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}
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return $resized;
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}
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/**
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*
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* debug messages; will only work if WP_DEBUG is on
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* or if the level is LOG_ERR, but that will kill the process
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*
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* @param string $message
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* @param int $level
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*/
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static function debug( $message, $level = LOG_NOTICE ) {
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if ( @is_array( $message ) || @is_object ( $message ) )
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$message = json_encode($message);
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switch ( $level ) {
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case LOG_ERR :
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wp_die( '<h1>Error:</h1>' . '<p>' . $message . '</p>' );
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exit;
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default:
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if ( !defined( 'WP_DEBUG' ) || WP_DEBUG != true )
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return;
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break;
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}
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error_log( __CLASS__ . " => " . $message );
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}
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/**
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*
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*/
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public static function is_post ( &$post ) {
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if ( !empty($post) && is_object($post) && isset($post->ID) && !empty($post->ID) )
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return true;
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return false;
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}
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}
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$WP_RESIZED2CACHE = new WP_RESIZED2CACHE();
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endif;
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