From 5409c27852374032271490b98eb4cc768c5b4f89 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sun, 7 Jul 2013 18:43:04 +0200
Subject: [PATCH] Partial GUI compatibility with XS data

---
 lib/Slic3r.pm            | 9 ++++++++-
 lib/Slic3r/ExPolygon.pm  | 7 +------
 lib/Slic3r/GUI/Plater.pm | 4 ++--
 lib/Slic3r/Polyline.pm   | 5 -----
 4 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index a3761ac6b..00d19713a 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -86,7 +86,14 @@ sub parallelize {
         my $q = Thread::Queue->new;
         $q->enqueue(@items, (map undef, 1..$Config->threads));
         
-        my $thread_cb = sub { $params{thread_cb}->($q) };
+        my $thread_cb = sub {
+            # prevent destruction of shared objects
+            no warnings 'redefine';
+            *Slic3r::ExPolygon::XS::DESTROY = sub {};
+            
+            return $params{thread_cb}->($q);
+        };
+            
         @_ = ();
         foreach my $th (map threads->create($thread_cb), 1..$Config->threads) {
             $params{collect_cb}->($th->join);
diff --git a/lib/Slic3r/ExPolygon.pm b/lib/Slic3r/ExPolygon.pm
index 3cb7c8ee1..19b3a90b6 100644
--- a/lib/Slic3r/ExPolygon.pm
+++ b/lib/Slic3r/ExPolygon.pm
@@ -35,11 +35,6 @@ sub clone {
 # no-op for legacy with ::XS
 sub arrayref { $_[0] }
 
-sub threadsafe_clone {
-    my $self = shift;
-    return (ref $self)->new(map $_->threadsafe_clone, @$self);
-}
-
 sub contour {
     my $self = shift;
     return $self->[0];
@@ -314,7 +309,7 @@ has 'expolygons' => (is => 'ro', default => sub { [] });
 sub clone {
     my $self = shift;
     return (ref $self)->new(
-        expolygons => [ map $_->threadsafe_clone, @{$self->expolygons} ],
+        expolygons => [ map $_->clone, @{$self->expolygons} ],
     );
 }
 
diff --git a/lib/Slic3r/GUI/Plater.pm b/lib/Slic3r/GUI/Plater.pm
index d9ac19c5b..dee592153 100644
--- a/lib/Slic3r/GUI/Plater.pm
+++ b/lib/Slic3r/GUI/Plater.pm
@@ -921,7 +921,7 @@ sub mouse_event {
         $parent->selection_changed(0);
         for my $preview (@{$parent->{object_previews}}) {
             my ($obj_idx, $instance_idx, $thumbnail) = @$preview;
-            if (first { $_->contour->encloses_point($pos) } @{$thumbnail->expolygons}) {
+            if (defined first { $_->contour->encloses_point($pos) } @{$thumbnail->expolygons}) {
                 $parent->{selected_objects} = [ [$obj_idx, $instance_idx] ];
                 $parent->{list}->Select($obj_idx, 1);
                 $parent->selection_changed(1);
@@ -951,7 +951,7 @@ sub mouse_event {
     } elsif ($event->Moving) {
         my $cursor = wxSTANDARD_CURSOR;
         for my $preview (@{$parent->{object_previews}}) {
-            if (first { $_->contour->encloses_point($pos) } @{ $preview->[2]->expolygons }) {
+            if (defined first { $_->contour->encloses_point($pos) } @{ $preview->[2]->expolygons }) {
                 $cursor = Wx::Cursor->new(wxCURSOR_HAND);
                 last;
             }
diff --git a/lib/Slic3r/Polyline.pm b/lib/Slic3r/Polyline.pm
index d63451a08..b979abad0 100644
--- a/lib/Slic3r/Polyline.pm
+++ b/lib/Slic3r/Polyline.pm
@@ -22,11 +22,6 @@ sub clone {
     Storable::dclone($_[0])
 }
 
-sub threadsafe_clone {
-    my $self = shift;
-    return (ref $self)->new(map $_->threadsafe_clone, @$self);
-}
-
 sub serialize {
     my $self = shift;
     return pack 'l*', map @$_, @$self;