[gimp/gimp-2-6] Bug 585488 – Perspective transformation on a layer with a mask causes crash

[Michael Natterer <mitch src gnome org>]

commit a55a33cab10b64e8bd7b379673656ea208bdbd57
Author: Michael Natterer <mitch gimp org>
Date:   Wed Jun 17 21:14:32 2009 +0200

    Bug 585488 â?? Perspective transformation on a layer with a mask causes crash
    
    (gimp_drawable_transform_affine)
    (gimp_drawable_transform_flip)
    (gimp_drawable_transform_rotate): also transform the layer mask if we
    are transforming a layer and there is no selection (which causes the
    entire layer to be transformed).

 app/core/gimpdrawable-transform.c |   43 +++++++++++++++++++++++++++++++++++++
 1 files changed, 43 insertions(+), 0 deletions(-)
---
diff --git a/app/core/gimpdrawable-transform.c b/app/core/gimpdrawable-transform.c
index 978c2c0..3d66d51 100644
--- a/app/core/gimpdrawable-transform.c
+++ b/app/core/gimpdrawable-transform.c
@@ -577,6 +577,22 @@ gimp_drawable_transform_affine (GimpDrawable           *drawable,
       if (GIMP_IS_CHANNEL (drawable) && tile_manager_bpp (orig_tiles) == 1)
         clip_result = GIMP_TRANSFORM_RESIZE_CLIP;
 
+      /*  also transform the mask if we are transforming an entire layer  */
+      if (GIMP_IS_LAYER (drawable) &&
+          gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
+          gimp_channel_is_empty (gimp_image_get_mask (image)))
+        {
+          GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
+
+          gimp_item_transform (GIMP_ITEM (mask), context,
+                               matrix,
+                               direction,
+                               interpolation_type,
+                               recursion_level,
+                               clip_result,
+                               progress);
+        }
+
       /* transform the buffer */
       new_tiles = gimp_drawable_transform_tiles_affine (drawable, context,
                                                         orig_tiles,
@@ -664,6 +680,19 @@ gimp_drawable_transform_flip (GimpDrawable        *drawable,
       if (GIMP_IS_CHANNEL (drawable) && tile_manager_bpp (orig_tiles) == 1)
         clip_result = TRUE;
 
+      /*  also transform the mask if we are transforming an entire layer  */
+      if (GIMP_IS_LAYER (drawable) &&
+          gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
+          gimp_channel_is_empty (gimp_image_get_mask (image)))
+        {
+          GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
+
+          gimp_item_flip (GIMP_ITEM (mask), context,
+                          flip_type,
+                          axis,
+                          clip_result);
+        }
+
       /* transform the buffer */
       if (orig_tiles)
         {
@@ -740,6 +769,20 @@ gimp_drawable_transform_rotate (GimpDrawable     *drawable,
       if (GIMP_IS_CHANNEL (drawable) && tile_manager_bpp (orig_tiles) == 1)
         clip_result = TRUE;
 
+      /*  also transform the mask if we are transforming an entire layer  */
+      if (GIMP_IS_LAYER (drawable) &&
+          gimp_layer_get_mask (GIMP_LAYER (drawable)) &&
+          gimp_channel_is_empty (gimp_image_get_mask (image)))
+        {
+          GimpLayerMask *mask = gimp_layer_get_mask (GIMP_LAYER (drawable));
+
+          gimp_item_rotate (GIMP_ITEM (mask), context,
+                            rotate_type,
+                            center_x,
+                            center_y,
+                            clip_result);
+        }
+
       /* transform the buffer */
       new_tiles = gimp_drawable_transform_tiles_rotate (drawable, context,
                                                         orig_tiles,