[gegl/soc-2011-seamless-clone: 29/49] Several small fixes to the all-in-one seamless clone op

[Barak Itkin <barakitkin src gnome org>]

commit dab7402916fed057cc088981bc2db386f3c5157c
Author: Barak Itkin <lightningismyname gmail com>
Date:   Sat Jun 23 16:16:59 2012 +0300

    Several small fixes to the all-in-one seamless clone op

 operations/common/seamless-clone/seamless-clone.c |   11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/seamless-clone/seamless-clone.c b/operations/common/seamless-clone/seamless-clone.c
index ed0a1bd..acdc1ed 100644
--- a/operations/common/seamless-clone/seamless-clone.c
+++ b/operations/common/seamless-clone/seamless-clone.c
@@ -21,6 +21,11 @@
 gegl_chant_int (max_refine_steps, _("Refinement Steps"), 0, 100000.0, 2000,
                 _("Maximal amount of refinement points to be used for the interpolation mesh"))
 
+gegl_chant_int (xoff, _("X offset"), -100000, +100000, 0,
+                _("How much horizontal offset should applied to the paste"))
+
+gegl_chant_int (yoff, _("Y offset"), -100000, +100000, 0,
+                _("How much vertical offset should applied to the paste"))
 #else
 
 #define GEGL_CHANT_TYPE_COMPOSER
@@ -120,13 +125,15 @@ process (GeglOperation       *operation,
   g_mutex_lock (props->mutex);
   if (props->aux != aux)
     {
+      if (props->preprocess)
+        sc_cache_free (props->preprocess);
+
       props->aux = aux;
-      props->preprocess = NULL;
       props->preprocess = sc_generate_cache (aux, gegl_operation_source_get_bounding_box (operation, "aux"), o -> max_refine_steps);
     }
   g_mutex_unlock (props->mutex);
 
-  return_val = sc_render_seamless (input, aux, 0, 0, output, result, props->preprocess);
+  return_val = sc_render_seamless (input, aux, o->xoff, o->yoff, output, result, props->preprocess);
   
   return  return_val;
 }