[mutter/gbsneto/window-screencast-fixes: 44/44] window-actor: Inhibit culling when blitting to screencast

[Jonas Ådahl <jadahl src gnome org>]

commit 9c3110d7af5ccb5631417184b5c64c6cbad6538e
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Wed Mar 18 21:14:58 2020 -0300

    window-actor: Inhibit culling when blitting to screencast
    
    This allows us to screencast any window continuously, even
    without it being visible. Because it's still being painted,
    clients continue to receive frame callbacks, and people
    are happy again.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1129

 src/compositor/meta-window-actor.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)
---
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index 143c5ac6b..9724c0243 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -1287,6 +1287,8 @@ meta_window_actor_blit_to_framebuffer (MetaScreenCastWindow *screen_cast_window,
   if (!clutter_actor_get_resource_scale (actor, &resource_scale))
     return FALSE;
 
+  clutter_actor_inhibit_culling (actor);
+
   width = ceilf (width * resource_scale);
   height = ceilf (height * resource_scale);
 
@@ -1322,6 +1324,8 @@ meta_window_actor_blit_to_framebuffer (MetaScreenCastWindow *screen_cast_window,
   cogl_framebuffer_pop_matrix (framebuffer);
   cogl_framebuffer_pop_clip (framebuffer);
 
+  clutter_actor_uninhibit_culling (actor);
+
   return TRUE;
 }
 
@@ -1399,11 +1403,13 @@ meta_window_actor_get_image (MetaWindowActor *self,
   float x, y;
   MetaRectangle scaled_clip;
   ClutterPaintContext *paint_context;
-  cairo_surface_t *surface;
+  cairo_surface_t *surface = NULL;
 
   if (!priv->surface)
     return NULL;
 
+  clutter_actor_inhibit_culling (actor);
+
   if (clutter_actor_get_n_children (actor) == 1)
     {
       MetaShapedTexture *stex;
@@ -1425,23 +1431,24 @@ meta_window_actor_get_image (MetaWindowActor *self,
         }
 
       stex = meta_surface_actor_get_texture (priv->surface);
-      return meta_shaped_texture_get_image (stex, surface_clip);
+      surface = meta_shaped_texture_get_image (stex, surface_clip);
+      goto out;
     }
 
   clutter_actor_get_size (actor, &width, &height);
 
   if (width == 0 || height == 0)
-    return NULL;
+    goto out;
 
   if (!clutter_actor_get_resource_scale (actor, &resource_scale))
-    return NULL;
+    goto out;
 
   width = ceilf (width * resource_scale);
   height = ceilf (height * resource_scale);
 
   texture = cogl_texture_2d_new_with_size (cogl_context, width, height);
   if (!texture)
-    return NULL;
+    goto out;
 
   cogl_primitive_texture_set_auto_mipmap (COGL_PRIMITIVE_TEXTURE (texture),
                                           FALSE);
@@ -1457,7 +1464,7 @@ meta_window_actor_get_image (MetaWindowActor *self,
                  error->message);
       cogl_object_unref (framebuffer);
       cogl_object_unref (texture);
-      return NULL;
+      goto out;
     }
 
   cogl_color_init_from_4ub (&clear_color, 0, 0, 0, 0);
@@ -1504,5 +1511,7 @@ meta_window_actor_get_image (MetaWindowActor *self,
 
   cairo_surface_mark_dirty (surface);
 
+out:
+  clutter_actor_uninhibit_culling (actor);
   return surface;
 }