[gimp] app: plug a memory leak

[Massimo Valentini <mvalentini src gnome org>]

commit a0221bc5602d6b749f78f62768cd6cee3999678d
Author: Massimo Valentini <mvalentini src gnome org>
Date:   Wed Sep 19 19:09:44 2012 +0200

    app: plug a memory leak
    
    and make the blend tool (Shape: Shaped (angular)) sligthly
    more efficient
    
    with an opaque layer (400x300) goes from:
    gradient_fill_region: gradient_fill_region took 52.69 seconds
    EEEEeEeek! 2 GeglBuffers leaked
    to:
    gradient_fill_region: gradient_fill_region took 5.90 seconds

 app/core/gimpdrawable-blend.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/app/core/gimpdrawable-blend.c b/app/core/gimpdrawable-blend.c
index cbbb48c..299a2fb 100644
--- a/app/core/gimpdrawable-blend.c
+++ b/app/core/gimpdrawable-blend.c
@@ -550,10 +550,13 @@ gradient_precalc_shapeburst (GimpImage           *image,
                                                  region->width, region->height),
                                  babl_format ("Y float"));
 
-  /*  allocate the selection mask copy  */
+  /*  allocate the selection mask copy
+   *  XXX: its format should be the same of gimp:shapeburst input buffer
+   *       porting the op to 'float' should be reflected here as well
+   */
   temp_buffer = gegl_buffer_new (GEGL_RECTANGLE (0, 0,
                                                  region->width, region->height),
-                                 gimp_image_get_mask_format (image));
+                                 babl_format ("Y u8"));
 
   mask = gimp_image_get_mask (image);
 
@@ -579,8 +582,7 @@ gradient_precalc_shapeburst (GimpImage           *image,
         {
           const Babl *component_format;
 
-          component_format =
-            gimp_image_get_component_format (image, GIMP_ALPHA_CHANNEL);
+          component_format = babl_format ("A u8");
 
           /*  extract the aplha into the temp mask  */
           gegl_buffer_set_format (temp_buffer, component_format);