[gimp/gimp-2-8] app: gimp_image_rotate(): fix rotation of sample points

[Michael Natterer <mitch src gnome org>]

commit 0229edd72b2317527333d2560fbe9b6b75d178c5
Author: Michael Natterer <mitch gimp org>
Date:   Sat May 24 22:41:21 2014 +0200

    app: gimp_image_rotate(): fix rotation of sample points
    
    and also notify the image of guide and sample point movements after
    rotation. This was probably broken since the introduction of canvas
    items.
    
    (cherry picked from commit 21ea6216f72d96a8d900b9da609fdc3f56f687f5)

 app/core/gimpimage-rotate.c |   28 ++++++++++++++++++++++------
 1 files changed, 22 insertions(+), 6 deletions(-)
---
diff --git a/app/core/gimpimage-rotate.c b/app/core/gimpimage-rotate.c
index adbe95a..0130f8a 100644
--- a/app/core/gimpimage-rotate.c
+++ b/app/core/gimpimage-rotate.c
@@ -210,6 +210,22 @@ gimp_image_rotate (GimpImage        *image,
         gimp_image_set_resolution (image, yres, xres);
     }
 
+  /*  Notify guide movements  */
+  for (list = gimp_image_get_guides (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_image_guide_moved (image, list->data);
+    }
+
+  /*  Notify sample point movements  */
+  for (list = gimp_image_get_sample_points (image);
+       list;
+       list = g_list_next (list))
+    {
+      gimp_image_sample_point_moved (image, list->data);
+    }
+
   gimp_image_undo_group_end (image);
 
   if (size_changed)
@@ -364,18 +380,18 @@ gimp_image_rotate_sample_points (GimpImage        *image,
       switch (rotate_type)
         {
         case GIMP_ROTATE_90:
-          sample_point->x = old_y;
-          sample_point->y = gimp_image_get_height (image) - old_x;
+          sample_point->x = gimp_image_get_height (image) - old_y;
+          sample_point->y = old_x;
           break;
 
         case GIMP_ROTATE_180:
-          sample_point->x = gimp_image_get_height (image) - old_x;
-          sample_point->y = gimp_image_get_width  (image) - old_y;
+          sample_point->x = gimp_image_get_width  (image) - old_x;
+          sample_point->y = gimp_image_get_height (image) - old_y;
           break;
 
         case GIMP_ROTATE_270:
-          sample_point->x = gimp_image_get_width (image) - old_y;
-          sample_point->y = old_x;
+          sample_point->x = old_y;
+          sample_point->y = gimp_image_get_width (image) - old_x;
           break;
         }
     }