[gimp/soc-2012-unified-transformation: 50/52] transformtool: We show corrective preview for selections and paths, so why not drawables

[Mikael Magnusson <mikachu src gnome org>]

commit a336eedfb6073c0a7085352e8a9a301a5a9f56b9
Author: Mikael Magnusson <mikachu src gnome org>
Date:   Wed Aug 15 01:40:20 2012 +0200

    transformtool: We show corrective preview for selections and paths, so why not drawables

 app/tools/gimptransformoptions.c |    3 +--
 app/tools/gimptransformtool.c    |    7 ++++++-
 2 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/app/tools/gimptransformoptions.c b/app/tools/gimptransformoptions.c
index 883e091..8a5a20c 100644
--- a/app/tools/gimptransformoptions.c
+++ b/app/tools/gimptransformoptions.c
@@ -553,8 +553,7 @@ gimp_transform_options_show_preview (GimpTransformOptions *options)
   g_return_val_if_fail (GIMP_IS_TRANSFORM_OPTIONS (options), FALSE);
 
   return (options->show_preview                           &&
-          options->type      == GIMP_TRANSFORM_TYPE_LAYER &&
-          options->direction == GIMP_TRANSFORM_FORWARD);
+          options->type      == GIMP_TRANSFORM_TYPE_LAYER);
 }
 
 
diff --git a/app/tools/gimptransformtool.c b/app/tools/gimptransformtool.c
index 38b9bd9..1230094 100644
--- a/app/tools/gimptransformtool.c
+++ b/app/tools/gimptransformtool.c
@@ -782,9 +782,14 @@ gimp_transform_tool_draw (GimpDrawTool *draw_tool)
     {
       if (gimp_transform_options_show_preview (options))
         {
+          GimpMatrix3 matrix = tr_tool->transform;
+
+          if (options->direction == GIMP_TRANSFORM_BACKWARD)
+            gimp_matrix3_invert (&matrix);
+
           gimp_draw_tool_add_transform_preview (draw_tool,
                                                 tool->drawable,
-                                                &tr_tool->transform,
+                                                &matrix,
                                                 tr_tool->x1,
                                                 tr_tool->y1,
                                                 tr_tool->x2,