[mutter] remote-desktop/virtual: Drop absolute events if not active

[Marge Bot <marge-bot src gnome org>]

commit 1e50ca005744c6aab68cff2c603795a1e4717e60
Author: Jonas Ådahl <jadahl gmail com>
Date:   Wed Mar 2 11:24:40 2022 +0100

    remote-desktop/virtual: Drop absolute events if not active
    
    If the remote desktop service emits absolute input events (e.g. absolute
    pointer events) before the stream has started streaming, we don't have a
    virtual monitor, as the size has not been negotiated yet. When this
    happens, just drop the event. Remote desktop services should probably
    make sure not to send events before the streaming has started, but them
    doing so anyway shouldn't trigger a crash, which would be the case
    otherwise.
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2270>

 src/backends/meta-screen-cast-stream-src.c     | 2 +-
 src/backends/meta-screen-cast-stream-src.h     | 2 ++
 src/backends/meta-screen-cast-virtual-stream.c | 3 +++
 3 files changed, 6 insertions(+), 1 deletion(-)
---
diff --git a/src/backends/meta-screen-cast-stream-src.c b/src/backends/meta-screen-cast-stream-src.c
index e86f9a2b7c..539cd998e3 100644
--- a/src/backends/meta-screen-cast-stream-src.c
+++ b/src/backends/meta-screen-cast-stream-src.c
@@ -678,7 +678,7 @@ meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc  *src,
   pw_stream_queue_buffer (priv->pipewire_stream, buffer);
 }
 
-static gboolean
+gboolean
 meta_screen_cast_stream_src_is_enabled (MetaScreenCastStreamSrc *src)
 {
   MetaScreenCastStreamSrcPrivate *priv =
diff --git a/src/backends/meta-screen-cast-stream-src.h b/src/backends/meta-screen-cast-stream-src.h
index 0e14dbb61b..2eafa57242 100644
--- a/src/backends/meta-screen-cast-stream-src.h
+++ b/src/backends/meta-screen-cast-stream-src.h
@@ -82,6 +82,8 @@ struct _MetaScreenCastStreamSrcClass
 
 void meta_screen_cast_stream_src_close (MetaScreenCastStreamSrc *src);
 
+gboolean meta_screen_cast_stream_src_is_enabled (MetaScreenCastStreamSrc *src);
+
 void meta_screen_cast_stream_src_maybe_record_frame (MetaScreenCastStreamSrc  *src,
                                                      MetaScreenCastRecordFlag  flags);
 
diff --git a/src/backends/meta-screen-cast-virtual-stream.c b/src/backends/meta-screen-cast-virtual-stream.c
index 34dd2a00cc..46f187c434 100644
--- a/src/backends/meta-screen-cast-virtual-stream.c
+++ b/src/backends/meta-screen-cast-virtual-stream.c
@@ -93,6 +93,9 @@ meta_screen_cast_virtual_stream_transform_position (MetaScreenCastStream *stream
   ClutterStageView *view;
   MetaRectangle view_layout;
 
+  if (!meta_screen_cast_stream_src_is_enabled (src))
+    return FALSE;
+
   view = meta_screen_cast_virtual_stream_src_get_view (virtual_src);
   if (!view)
     return FALSE;