[gimp] app: propagate space in gimp_layer_mode_get_format

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

commit 34376c7abf21999587648df4f39d402afe5d07ab
Author: Øyvind Kolås <pippin gimp org>
Date:   Thu Nov 1 01:50:13 2018 +0100

    app: propagate space in gimp_layer_mode_get_format
    
    We were not propagating the space properly causing compositing and blending to
    always happen in default/linear sRGB space.

 app/operations/layer-modes/gimp-layer-modes.c       | 12 ++++++------
 app/operations/layer-modes/gimpoperationlayermode.c |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/app/operations/layer-modes/gimp-layer-modes.c b/app/operations/layer-modes/gimp-layer-modes.c
index 50abd060aa..784fe71187 100644
--- a/app/operations/layer-modes/gimp-layer-modes.c
+++ b/app/operations/layer-modes/gimp-layer-modes.c
@@ -1429,21 +1429,21 @@ gimp_layer_mode_get_format (GimpLayerMode        mode,
        */
       if (! preferred_format ||
           gimp_babl_format_get_trc (preferred_format) == GIMP_TRC_LINEAR)
-        return babl_format ("RGBA float");
+        return babl_format_with_space ("RGBA float", preferred_format);
       else
-        return babl_format ("R'G'B'A float");
+        return babl_format_with_space ("R'G'B'A float", preferred_format);
 
     case GIMP_LAYER_COLOR_SPACE_RGB_LINEAR:
-      return babl_format ("RGBA float");
+      return babl_format_with_space ("RGBA float", preferred_format);
 
     case GIMP_LAYER_COLOR_SPACE_RGB_PERCEPTUAL:
-      return babl_format ("R'G'B'A float");
+      return babl_format_with_space ("R'G'B'A float", preferred_format);
 
     case GIMP_LAYER_COLOR_SPACE_LAB:
-      return babl_format ("CIE Lab alpha float");
+      return babl_format_with_space ("CIE Lab alpha float", preferred_format);
     }
 
-  g_return_val_if_reached (babl_format ("RGBA float"));
+  g_return_val_if_reached (babl_format_with_space ("RGBA float", preferred_format));
 }
 
 GimpLayerCompositeRegion
diff --git a/app/operations/layer-modes/gimpoperationlayermode.c 
b/app/operations/layer-modes/gimpoperationlayermode.c
index b2e679b792..3ebb2f698b 100644
--- a/app/operations/layer-modes/gimpoperationlayermode.c
+++ b/app/operations/layer-modes/gimpoperationlayermode.c
@@ -366,7 +366,7 @@ gimp_operation_layer_mode_prepare (GeglOperation *operation)
   gegl_operation_set_format (operation, "input",  format);
   gegl_operation_set_format (operation, "output", format);
   gegl_operation_set_format (operation, "aux",    format);
-  gegl_operation_set_format (operation, "aux2",   babl_format ("Y float"));
+  gegl_operation_set_format (operation, "aux2",   babl_format_with_space ("Y float", format));
 }
 
 static gboolean