[gegl] convolution-matrix: propagate BablSpace

[Øyvind "pippin" Kolås <ok src gnome org>]

commit 90abbacf2b558b25481dcddf0f2030f444bfa9d7
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Jul 5 15:19:24 2018 +0200

    convolution-matrix: propagate BablSpace

 operations/common/convolution-matrix.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/operations/common/convolution-matrix.c b/operations/common/convolution-matrix.c
index ace588ce3..e1bd5e8f2 100644
--- a/operations/common/convolution-matrix.c
+++ b/operations/common/convolution-matrix.c
@@ -108,6 +108,8 @@ enough_with_3x3 (GeglProperties *o)
 static void
 prepare (GeglOperation *operation)
 {
+  const Babl *space = gegl_operation_get_source_space (operation, "input");
+
   GeglOperationAreaFilter *op_area = GEGL_OPERATION_AREA_FILTER (operation);
 
   GeglProperties          *o       = GEGL_PROPERTIES (operation);
@@ -117,7 +119,7 @@ prepare (GeglOperation *operation)
     op_area->left = op_area->right = op_area->top = op_area->bottom = 2; /* 5 */
 
   gegl_operation_set_format (operation, "output",
-                             babl_format ("RGBA float"));
+                             babl_format_with_space ("RGBA float", space));
 }
 
 static void
@@ -455,7 +457,7 @@ process (GeglOperation       *operation,
 {
   GeglProperties          *o       = GEGL_PROPERTIES (operation);
   GeglOperationAreaFilter *op_area = GEGL_OPERATION_AREA_FILTER (operation);
-  const Babl              *format  = babl_format ("RGBA float");
+  const Babl              *format  = gegl_operation_get_format (operation, "output");
   GeglRectangle            rect;
   gfloat                  *src_buf;
   gfloat                  *dst_buf;