[gimp] app: more meticulously tickle tile ref-counts

[Michael Natterer <mitch src gnome org>]

commit d5ff53c70d4de4bff038a3632b7fe22e47050f0b
Author: Ãyvind KolÃs <pippin gimp org>
Date:   Thu Mar 15 01:02:02 2012 +0000

    app: more meticulously tickle tile ref-counts

 app/gegl/gimptilebackendtilemanager.c |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/app/gegl/gimptilebackendtilemanager.c b/app/gegl/gimptilebackendtilemanager.c
index ac4c85a..6953575 100644
--- a/app/gegl/gimptilebackendtilemanager.c
+++ b/app/gegl/gimptilebackendtilemanager.c
@@ -117,6 +117,13 @@ tile_done (Tile *tile,
   tile_release (data, FALSE);
 }
 
+static void
+tile_done_writing (Tile *tile,
+                   void *data)
+{
+  tile_release (data, TRUE);
+}
+
 static gpointer
 gimp_tile_backend_tile_manager_command (GeglTileSource  *tile_store,
                                         GeglTileCommand  command,
@@ -158,7 +165,9 @@ gimp_tile_backend_tile_manager_command (GeglTileSource  *tile_store,
             /* use the GimpTile directly as GEGL tile */
             tile = gegl_tile_new_bare ();
             gegl_tile_set_data_full (tile, tile_data_pointer (gimp_tile, 0, 0),
-                                     tile_size, (void*)tile_done, gimp_tile);
+                                     tile_size, backend_tm->priv->write?
+                                     (void*)tile_done_writing:(void*)tile_done,
+                                     gimp_tile);
           }
         else
           {
@@ -170,7 +179,7 @@ gimp_tile_backend_tile_manager_command (GeglTileSource  *tile_store,
                         tile_data_pointer (gimp_tile, 0, row),
                         gimp_tile_stride);
               }
-            tile_release (gimp_tile, FALSE);
+            tile_release (gimp_tile, backend_tm->priv->write);
           }
 
         return tile;
@@ -210,6 +219,8 @@ gimp_tile_write (GimpTileBackendTileManager *backend_tm,
   gint  gimp_tile_stride;
   int   row;
 
+  g_assert (backend_tm->priv->write);
+
   gimp_tile = tile_manager_get_at (backend_tm->priv->tile_manager,
                                    x, y, TRUE, TRUE);