only in patch2:
unchanged:
--- a/modules/media_wysiwyg/media_wysiwyg.api.php
+++ b/modules/media_wysiwyg/media_wysiwyg.api.php
@@ -69,3 +69,23 @@ function hook_media_wysiwyg_token_to_markup_alter(&$element, $tag_info, $setting
     $element['#attributes']['alt'] = t('This media has been output using the @mode view mode.', array('@mode' => $tag_info['view_mode']));
   }
 }
+
+/**
+ * Alter the dynamically built WYSIWYG Media markup.
+ *
+ * @param array $element
+ *   The renderable array of output generated for WYSIWYG.
+ */
+function hook_media_wysiwyg_wysiwyg_markup_alter(&$element) {
+  $file = $element['#file'];
+  // Add an alignment class.
+  $langcode = field_language('file', $file, 'field_image_alignment');
+  $alignment = $file->field_image_alignment[$langcode];
+  $element['#item']['attributes']['class'][] = $alignment;
+
+  // Provide the image size details.
+  if ($size = getimagesize($file->uri)) {
+    $element['#item']['width'] = $size[0];
+    $element['#item']['height'] = $size[1];
+  }
+}