[gegl] operations: add a flush parameter to gegl:write-buffer

[Ville Sokk <villesokk src gnome org>]

commit 6b4f3ee311861961e7ee6b6f298ddab5d47c728f
Author: Ville Sokk <ville sokk gmail com>
Date:   Mon Aug 13 12:34:23 2012 +0300

    operations: add a flush parameter to gegl:write-buffer

 operations/common/write-buffer.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)
---
diff --git a/operations/common/write-buffer.c b/operations/common/write-buffer.c
index 240e641..95790c2 100644
--- a/operations/common/write-buffer.c
+++ b/operations/common/write-buffer.c
@@ -25,6 +25,9 @@
 gegl_chant_object (buffer, _("Buffer location"),
                    _("Write to an existing GeglBuffer"))
 
+gegl_chant_boolean (flush, _("Flush buffer"), TRUE,
+                    _("Flush buffer after writing"))
+
 #else
 
 #define GEGL_CHANT_TYPE_SINK
@@ -86,7 +89,9 @@ process (GeglOperation       *operation,
       else
         gegl_buffer_copy (input, result, output, result);
 
-      gegl_buffer_flush (output);
+      if (o->flush)
+        gegl_buffer_flush (output);
+
       gegl_node_emit_computed (operation->node, result);
     }