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<?php
/**
* WPThumb Enhancements Class
* Date: 7 Nov 2016
*
* Some themes include a filter to override the ORDER of the image editors to be used,
* so that the GD library is used as a preference over the Imagick library.
* This is acceptable, but WPThumb requires it's own overrides of the WP_Image_Editor_GD
* and WP_Image_Editor_Imagick classes (set in wpthumb.php 'wpthumb_add_image_editors'
* function). An example of this filter code is:
*
* add_filter( 'wp_image_editors', 'change_graphic_lib' );
* function change_graphic_lib($array) {
* return array( 'WP_Image_Editor_GD', 'WP_Image_Editor_Imagick' );
* }
*
* The theme's filter runs after the WPThumb filter, so the override classes needed
* by WPThumb are ignored. This stops WPThumb from working altogether. To get around
* this we need to override the image editors later (priority 999) and "force" the
* usage of the WPThumb override classes, while still preserving the order set by the
* theme author, or server administrator.
*
* The hosting provider's decision to use GD over Imagick is usually due to a timeout
* that occurs when large images are uploaded to the media library. The PHP setting
* for memory on the server could be too low, and this causes Imagick to timeout.
* Switching to GD usually fixes the problem, without needing to change memory limits.
*
*/
if ( ! class_exists( 'FooGallery_WPThumb_Enhancements' ) ) {
class FooGallery_WPThumb_Enhancements {
function __construct() {
add_filter( 'wp_image_editors', array( $this, 'override_image_editors' ), 999 );
}
/**
* Overrides the editors to make sure the WPThumb editors are included
*
* @param $editors
* @return array
*/
function override_image_editors($editors) {
$wpthumb_editors = array();
//replace the default image editors with the WPThumb image editors.
// also preserve the order so that certain hosts work as expected
foreach ($editors as $editor) {
switch ($editor) {
case 'WP_Image_Editor_Imagick':
$wpthumb_editors[] = 'WP_Thumb_Image_Editor_Imagick';
break;
case 'WP_Image_Editor_GD':
$wpthumb_editors[] = 'WP_Thumb_Image_Editor_GD';
break;
default:
$wpthumb_editors[] = $editor;
}
}
//make sure we have a unique list of editors
return array_unique( $wpthumb_editors );
}
}
}
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