feature 2541 multisize

- core implementation + usage on most public/admin pages
- still to do: sync process, upload, gui/persistence for size parameters, migration script, center of interest ...

git-svn-id: http://piwigo.org/svn/trunk@12796 68402e56-0260-453c-a942-63ccdbb3a9ee

comments.php

@@ -408,7 +408,7 @@ if (count($comments) > 0)
   // retrieving element informations
   $elements = array();
   $query = '
-SELECT id, name, file, path, tn_ext
+SELECT id, name, file, path, representative_ext
   FROM '.IMAGES_TABLE.'
   WHERE id IN ('.implode(',', $element_ids).')
 ;';
@@ -450,7 +450,7 @@ SELECT c.id, name, permalink, uppercats, com.id as comment_id
     }
 
     // source of the thumbnail picture
-    $thumbnail_src = get_thumbnail_url( $elements[$comment['image_id']] );
+    $thumbnail_src = DerivativeImage::thumb_url( $elements[$comment['image_id']] );
 
     // link to the full size picture
     $url = make_picture_url(