[gimp] Bug 711329 - Artifacts on crop tool's passepartout when set to "allow growing"

[Michael Natterer <mitch src gnome org>]

commit 61c2ef40f711f0e452bd8baa67813c454e5a7658
Author: Michael Natterer <mitch gimp org>
Date:   Sun Nov 3 15:21:22 2013 +0100

    Bug 711329 - Artifacts on crop tool's passepartout when set to "allow growing"
    
    Calculate GimpCanvasPassepartout's extents using a cairo_region_xor()
    of the crop rectangle and the image extents, instead of a
    cairo_region_subtract(). This fixes the artifacts and has the nice
    side effect that the passepartout now colors both the parts of the
    image that will be removed *and* the parts of the image that will be
    newly added.

 app/display/gimpcanvaspassepartout.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/display/gimpcanvaspassepartout.c b/app/display/gimpcanvaspassepartout.c
index 558240b..cfa0b94 100644
--- a/app/display/gimpcanvaspassepartout.c
+++ b/app/display/gimpcanvaspassepartout.c
@@ -92,7 +92,7 @@ gimp_canvas_passe_partout_get_extents (GimpCanvasItem *item)
 
   inner = GIMP_CANVAS_ITEM_CLASS (parent_class)->get_extents (item);
 
-  cairo_region_subtract (outer, inner);
+  cairo_region_xor (outer, inner);
 
   return outer;
 }