frames: avoid deprecated 'gtk_widget_set_double_buffered'

based in the mutter commits:

https://gitlab.gnome.org/GNOME/mutter/commit/b8b0dc5c78008647f5833f63d88456025f17bd08

https://gitlab.gnome.org/GNOME/mutter/commit/669c9da2a48d9a5573edee09065b8558c1d07035

1 files changed, 17 insertions, 6 deletions

diff --git a/src/ui/frames.c b/src/ui/frames.c
index f06c22be..8e6eefd3 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -195,8 +195,6 @@ meta_frames_init (MetaFrames *frames)
   frames->invalidate_frames = NULL;
   frames->cache = g_hash_table_new (g_direct_hash, g_direct_equal);
 
-  gtk_widget_set_double_buffered (GTK_WIDGET (frames), FALSE);
-
   meta_prefs_add_listener (prefs_changed_callback, frames);
 }
 
@@ -2227,6 +2225,21 @@ subtract_client_area (cairo_region_t *region, MetaUIFrame *frame)
   cairo_region_destroy (tmp_region);
 }
 
+static MetaUIFrame *
+find_frame_to_draw (MetaFrames *frames,
+                    cairo_t    *cr)
+{
+  GHashTableIter iter;
+  MetaUIFrame *frame;
+
+  g_hash_table_iter_init (&iter, frames->frames);
+  while (g_hash_table_iter_next (&iter, NULL, (gpointer *) &frame))
+    if (gtk_cairo_should_draw_window (cr, frame->window))
+      return frame;
+
+  return NULL;
+}
+
 static gboolean
 meta_frames_draw (GtkWidget *widget,
                   cairo_t   *cr)
@@ -2237,14 +2250,12 @@ meta_frames_draw (GtkWidget *widget,
   cairo_region_t *region;
   cairo_rectangle_int_t clip;
   int i, n_areas;
-  cairo_surface_t *target;
 
   frames = META_FRAMES (widget);
-  target = cairo_get_target (cr);
   gdk_cairo_get_clip_rectangle (cr, &clip);
 
-  g_assert (cairo_surface_get_type (target) == CAIRO_SURFACE_TYPE_XLIB);
-  frame = meta_frames_lookup_window (frames, cairo_xlib_surface_get_drawable (target));
+  frame = find_frame_to_draw (frames, cr);
+
   if (frame == NULL)
     return FALSE;