Fast Rewrite sharpening

Relevant. Especially this.

Ok, after some poundering, and thanks to code already existed but wasn’t used, found my way around to enable support for specifically chosen plugins in shortInit mode.

In class.wppp_serve_image.php ~line 174

$this->load_wppp();

// added to re-enable the built-in support for plugins in shortInit mode
$this->prepare_resize();

in serve-dynamic-images.php ~line 116 (right after EWWW code)

// Add support for other plugins
// as we can't use hooks in ShortInit, we do it via an option instead
$wppp_dynimg_shortInit_plugins = get_option( 'wppp_dynimg_shortInit_plugins', array() );

if ( !empty( $wppp_dynimg_shortInit_plugins ) && is_array( get_option( 'active_plugins' ) ) ) {

    // copied from above to keep this tweak self-contained
    if ( !$ewww ) { 
        wp_plugin_directory_constants();
        wp_load_translations_early();
        $GLOBALS['wp_plugin_paths'] = array();
    }
    
    foreach( $wppp_dynimg_shortInit_plugins as $plugin ) {
        $path = wp_normalize_path(WP_PLUGIN_DIR . '/' . $plugin);
        wp_register_plugin_realpath( $path );
        include_once ( $path );
    }
}

Now, to include a new plugin (for example this), I use this code in functions.php:

add_action( 'init', 'wppp_dynimg_shortInit_plugins' );
function wppp_dynimg_shortInit_plugins() {
    
    // plugin to include
    $plugin = 'sharpen-resized-images/ajx-sharpen-resized-images.php';
    
    $plugins_include = get_option('wppp_dynimg_shortInit_plugins', array());

    // check if the plugin is not already in the option array
    // to avoid redundant entries
    if( !in_array( $plugin, $plugins_include ) ) {
        $plugins_include[] = $plugin;
        update_option('wppp_dynimg_shortInit_plugins', $plugins_include);
    }

}

That’s it, it works!

Hope Bjoern would (re)consider support for at least some simpler kinds of plugins in an upcoming version.

Have been updating this tweak to make it a bit more robust. Will share upon request, to not spam this topic anymore.

Another useful thing that have added lately is the support for a special page containing the code that will hook during SHORTINIT. That way one’s not obliged to use plugins as in the previous patch above. This page is located at <current_theme>/wppp/wppp_shortinit_functions.php

The code for supporting this page is right after the SHORTINIT plugins code. So it all together looks like this now:

// Add support for selected plugins
// as we can't use hooks in ShortInit, we do it via an option instead
$wppp_dynimg_shortInit_plugins = array_unique( get_option( 'wppp_dynimg_shortInit_plugins', array() ) );
$plugins = get_option( 'active_plugins', array() ); 

if ( !empty( $wppp_dynimg_shortInit_plugins ) && !empty( $plugins ) ) {

    // copied from above to keep this patch self-contained
    if ( !$ewww ) { 
        wp_plugin_directory_constants();
        wp_load_translations_early();
        $GLOBALS['wp_plugin_paths'] = array();
    }
    
    // Load the wanted plugins.
    // Mind SHORTINIT imposes many limitations, as for performance reasons
    // only a very limited functionality of WP core is loaded and available
    foreach( array_keys($wppp_dynimg_shortInit_plugins) as $key ) {

        $plugin = $wppp_dynimg_shortInit_plugins[$key];

        if ( in_array( $plugin, $plugins ) ) {
            $path = wp_normalize_path(WP_PLUGIN_DIR . '/' . $plugin);
           #error_log( var_export( $path, true ));
            if ( file_exists( $path ) ) {
                wp_register_plugin_realpath( $path );
                include_once( $path );
            }
        } else {
            // wanted but inactive plugins become forgotten 
            unset( $wppp_dynimg_shortInit_plugins[$key] );
            update_option('wppp_dynimg_shortInit_plugins', array_unique( $wppp_dynimg_shortInit_plugins ) );
        }
    }
    unset( $plugins );
}
// Add support for theme-based configuration.
// A more convoluted way is used to get the current theme path
// because the absence of many core functions in SHORTINIT
$wppp_theme_settings = wp_normalize_path(WP_CONTENT_DIR.'/themes/'.get_option('stylesheet').'/wppp/wppp_shortinit_functions.php');
if ( file_exists( $wppp_theme_settings ) ) {
    include_once( $wppp_theme_settings );
}

Here’s for example how I use wppp_shortinit_functions.php with a proposed new filter, to allow me modify the crop position of certain images where heads get cut off:

/**
 * WPPP SHORTINIT Filters
 * Mind many/most of WP core functions won't work in SHORTINIT mode, 
 * so keep it simple and always test
 */

// no direct page access
defined('ABSPATH') || exit;

add_filter( 'wppp_dynimg_crop_position', 'top_crop_position_images', 10, 2 );
function top_crop_position_images( $position, $image_path ) {

    $image_files_top_pos = [
    'a4-east-woman-y21',
    ];

    $image_name = basename( $image_path );
    
    foreach( $image_files_top_pos as $image ) {
        if ( strpos($image_name, $image) !== FALSE ) {
            $position = ['center','top'];
            break;
        }
    }
    return $position;
}

HTH.