[gegl] plasma: If no seed is specified, use a random one by default

[Mukund Sivaraman <muks src gnome org>]

commit 0ba38f4112c92dfbeb6ceeac87cfbeec8d56da08
Author: Mukund Sivaraman <muks banu com>
Date:   Thu Jun 30 14:24:42 2011 +0530

    plasma: If no seed is specified, use a random one by default

 operations/workshop/plasma.c |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/operations/workshop/plasma.c b/operations/workshop/plasma.c
index 018b83d..e1595db 100644
--- a/operations/workshop/plasma.c
+++ b/operations/workshop/plasma.c
@@ -24,8 +24,8 @@
 
 #ifdef GEGL_CHANT_PROPERTIES
 
-gegl_chant_int (seed, _("Seed"), 0 , G_MAXINT, 1,
-   _("Random seed"))
+gegl_chant_int (seed, _("Seed"), -1, G_MAXINT, -1,
+   _("Random seed. Passing -1 implies that the seed is randomly chosen."))
 gegl_chant_double (turbulance, _("Turbulance"), 0.1, 7.0, 2,
    _("The value of the turbulance"))
 
@@ -269,7 +269,7 @@ process (GeglOperation       *operation,
 
   GeglRectangle boundary=plasma_get_bounding_box(operation);  
 
-  GRand *gr = g_rand_new_with_seed (o->seed);
+  GRand *gr;
   gint   depth;
   gint   x, y;
 
@@ -280,6 +280,11 @@ process (GeglOperation       *operation,
   x = boundary.x + boundary.width;
   y = boundary.y + boundary.height;
 
+  if (o->seed == -1)
+    gr = g_rand_new ();
+  else
+    gr = g_rand_new_with_seed (o->seed);
+
   do_plasma_big (output, boundary.x, boundary.y, x-1, y-1, -1,
                  0, gr, o);
    /*