[gimp] Revert "core: speed up gimp_image_contiguous_region_by_seed using a temporary GeglBuffer"

[Michael Natterer <mitch src gnome org>]

commit d53deda61bf60535a8505b7f6e6e37d28f405925
Author: Michael Natterer <mitch gimp org>
Date:   Mon Apr 8 02:34:56 2013 +0200

    Revert "core: speed up gimp_image_contiguous_region_by_seed using a temporary GeglBuffer"
    
    This reverts commit c204b0ac413539ee763483970a64eb437a43de3f, it's
    a nice speedup we should keep, but we can't return a GimpChannel
    of != image precision from that function. Needs more thinking.

 app/core/gimpimage-contiguous-region.c |   16 ++++------------
 1 files changed, 4 insertions(+), 12 deletions(-)
---
diff --git a/app/core/gimpimage-contiguous-region.c b/app/core/gimpimage-contiguous-region.c
index f16ba88..64edbbc 100644
--- a/app/core/gimpimage-contiguous-region.c
+++ b/app/core/gimpimage-contiguous-region.c
@@ -113,10 +113,11 @@ gimp_image_contiguous_region_by_seed (GimpImage           *image,
 
   src_buffer = gimp_pickable_get_buffer (pickable);
 
-  mask_buffer = gegl_buffer_new (gegl_buffer_get_extent (src_buffer),
-                                 babl_format ("Y float"));
+  mask = gimp_channel_new_mask (image,
+                                gegl_buffer_get_width  (src_buffer),
+                                gegl_buffer_get_height (src_buffer));
 
-  gegl_buffer_clear (mask_buffer, NULL);
+  mask_buffer = gimp_drawable_get_buffer (GIMP_DRAWABLE (mask));
 
   gegl_buffer_sample (src_buffer, x, y, NULL, start_col, src_format,
                       GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
@@ -144,15 +145,6 @@ gimp_image_contiguous_region_by_seed (GimpImage           *image,
                                  antialias, threshold,
                                  x, y, start_col);
 
-  /* wrap mask_buffer in a drawable and return it */
-  mask = gimp_channel_new_mask (image,
-                                gegl_buffer_get_width  (mask_buffer),
-                                gegl_buffer_get_height (mask_buffer));
-
-  gimp_drawable_set_buffer (GIMP_DRAWABLE (mask), FALSE, "", mask_buffer);
-
-  g_object_unref (mask_buffer);
-
   return mask;
 }