Ticket #30596: class-wp-image-editor-gd.php.patch

class-wp-image-editor-gd.php

@@ -306 +306 @@
          */
         public function rotate( $angle ) {
                 if ( function_exists('imagerotate') ) {
-                        $rotated = imagerotate( $this->image, $angle, 0 );
+                        $transparency = imagecolorallocatealpha( $this->image, 255, 255, 255, 127 );
+                        $rotated = imagerotate( $this->image, $angle, $transparency );
 
                         if ( is_resource( $rotated ) ) {
+                                imagealphablending($rotated, true);
+                                imagesavealpha($rotated, true);
                                 imagedestroy( $this->image );
                                 $this->image = $rotated;
                                 $this->update_size();