Index: include/config_default.inc.php
===================================================================
--- include/config_default.inc.php      (revision 1322)
+++ include/config_default.inc.php      (revision 1323)
@@ -765,4 +765,8 @@

 // 'small', 'medium' or 'large'
 $conf['derivative_default_size'] = 'medium';
+
+// 'png' or 'jpg': your uploaded TIF photos will have a representative in
+// JPEG or PNG file format
+$conf['tiff_representative_ext'] = 'png';
 ?>
\ No newline at end of file
Index: admin/themes/default/template/photos_add_direct.tpl
===================================================================
--- admin/themes/default/template/photos_add_direct.tpl (revision 1322)
+++ admin/themes/default/template/photos_add_direct.tpl (revision 1323)
@@ -125,7 +125,7 @@
     'auto'           : false,
     'multi'          : true,
     'fileTypeDesc'   : 'Photo files',
-    'fileTypeExts'   : '*.jpg;*.JPG;*.jpeg;*.JPEG;*.png;*.PNG;*.gif;*.GIF',
+    'fileTypeExts'   : '*.jpg;*.JPG;*.jpeg;*.JPEG;*.png;*.PNG;*.gif;*.GIF;{/literal}{if $tif_enabled}*.tif;*.TIF;*.tiff;*.TIFF{/if}{literal}',
     'fileSizeLimit'  : sizeLimit,
     'progressData'   : 'percentage',
     requeueErrors   : false,
Index: admin/include/photos_add_direct_prepare.inc.php
===================================================================
--- admin/include/photos_add_direct_prepare.inc.php     (revision 1322)
+++ admin/include/photos_add_direct_prepare.inc.php     (revision 1323)
@@ -132,6 +132,13 @@
   );

 $upload_file_types = 'jpeg, png, gif';
+
+if (pwg_image::get_library() == 'ext_imagick')
+{
+  $upload_file_types.= ', tiff';
+  $template->assign('tif_enabled', true);
+}
+
 if ('html' == $upload_mode)
 {
   $upload_file_types.= ', zip';
Index: admin/include/functions_upload.inc.php
===================================================================
--- admin/include/functions_upload.inc.php      (revision 1322)
+++ admin/include/functions_upload.inc.php      (revision 1323)
@@ -175,6 +175,7 @@
   }
 
   $file_path = null;
+  $is_tiff = false;
 
   if (isset($image_id))
   {
@@ -230,6 +231,11 @@
     {
       $file_path.= 'gif';
     }
+    elseif (IMAGETYPE_TIFF_MM == $type or IMAGETYPE_TIFF_II == $type)
+    {
+      $is_tiff = true;
+      $file_path.= 'tif';
+    }
     else
     {
       $file_path.= 'jpg';
@@ -248,6 +254,27 @@
   }
   @chmod($file_path, 0644);
 
+  if ($is_tiff and pwg_image::get_library() == 'ext_imagick')
+  {
+    // move the uploaded file to pwg_representative sub-directory
+    $representative_file_path = dirname($file_path).'/pwg_representative/';
+    $representative_file_path.= get_filename_wo_extension(basename($file_path)).'.';
+
+    $representative_ext = $conf['tiff_representative_ext'];
+    $representative_file_path.= $representative_ext;
+
+    prepare_directory(dirname($representative_file_path));
+    
+    $exec = $conf['ext_imagick_dir'].'convert';
+    $exec .= ' "'.realpath($file_path).'"';
+
+    $dest = pathinfo($representative_file_path);
+    $exec .= ' "'.realpath($dest['dirname']).'/'.$dest['basename'].'"';
+    
+    $exec .= ' 2>&1';
+    @exec($exec, $returnarray);
+  }
+
   if (pwg_image::get_library() != 'gd')
   {
     if ($conf['original_resize'])
@@ -324,6 +351,11 @@
       $insert['level'] = $level;
     }
 
+    if (isset($representative_ext))
+    {
+      $insert['representative_ext'] = $representative_ext;
+    }
+
     single_insert(IMAGES_TABLE, $insert);
 
     $image_id = pwg_db_insert_id(IMAGES_TABLE);