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onscreen/native: Hold ref to the output and CRTC until detached

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When an onscreen is "attached" it means it has an active CRTC and output
it interacts with, e.g. listens to configuration changes to update gamma
and privacy screen state.

MetaOutput and MetaCrtc are rather short lived objects meaning they are
disposed of and regenerated each time the compositor reloads monitor
resources, and while MetaOutput are indirectly kept alive due to the
MetaMonitor holding on to them during reloading, the same does not apply
to MetaCrtc, so to avoid trying to disconnect our signals from
disappeared outputs and CRTCs when we dispatch, hold our own references
to these objects.

Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2665
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2885>
This commit is contained in:
Jonas Ådahl 2023-03-03 14:59:21 +01:00 committed by Marge Bot
parent d1785a3917
commit 08593ea872
1 changed files with 5 additions and 2 deletions
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7
src/backends/native/meta-onscreen-native.c
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@ -2251,8 +2251,9 @@ meta_onscreen_native_new (MetaRendererNative *renderer_native,
onscreen_native->renderer_native = renderer_native;
onscreen_native->render_gpu = render_gpu;
onscreen_native->output = output;
onscreen_native->crtc = crtc;
g_set_object (&onscreen_native->output, output);
g_set_object (&onscreen_native->crtc, crtc);
if (meta_crtc_get_gamma_lut_size (crtc) > 0)
{
@ -2368,4 +2369,6 @@ void
meta_onscreen_native_detach (MetaOnscreenNative *onscreen_native)
{
clear_invalidation_handlers (onscreen_native);
g_clear_object (&onscreen_native->output);
g_clear_object (&onscreen_native->crtc);
}