[wp-trac] [WordPress Trac] #45982: PDF thumbnails have a default black background

[WordPress Trac]

#45982: PDF thumbnails have a default black background
--------------------------+------------------------------
 Reporter:  nebrekab      |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  Media         |     Version:  5.0.3
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
--------------------------+------------------------------

Comment (by thatstevensguy):

 Replying to [comment:8 joostdekeijzer]:
 > With my patch (see comment above) and below code my pdf's are without
 black backgrounds:
 >
 > {{{#!php
 > <?php
 >     add_action( 'imagick_load_after_read', function( $image, $filename,
 $file_extension ) {
 >       if ( 'pdf' === $file_extension ) {
 >         $image->setImageAlphaChannel( Imagick::ALPHACHANNEL_REMOVE );
 >       }
 >     }, 10, 3 );
 >
 > }}}

 I am using a combination of this and above, I wish the hook was in core
 already.

 {{{#!php
 <?php

 /**
  * Patch for black backgrounds on PDF's. Does require a core modification.
  *
  * https://core.trac.wordpress.org/ticket/45982
  *
  * /wp-includes/class-wp-image-editor-magick.php
  *
  * Line 166:
  * do_action_ref_array( 'imagick_load_after_read', array( &$this->image,
 $filename, $file_extension, $this->mime_type ) );
  *
  * @param object $image
  * @param string $filename
  * @param string $file_extension
  * @param string $mime_type
  */

 add_action('imagick_load_after_read', function (object $image, string
 $filename, string $file_extension, string $mime_type) {
     if ('pdf' === $file_extension) {
         $image->setImageAlphaChannel(Imagick::ALPHACHANNEL_REMOVE);
         $image->setImageBackgroundColor('#ffffff');
     }
 }, 10, 4);
 }}}

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/45982#comment:9>
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