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libweston: Add an output capture task destroy listener

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An output task may be destroyed by a client disconnect. This causes
problems for our drm backend's asynchronous capture task handler, which
currently has no way to notice this.

Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
This commit is contained in:
Derek Foreman 2025-09-03 10:04:22 -05:00
parent 48cc12cfc5
commit d2bab8a5ee
2 changed files with 22 additions and 0 deletions
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19
libweston/output-capture.c
View file

@ -110,6 +110,8 @@ struct weston_capture_task {
struct weston_buffer *buffer;
struct wl_listener buffer_resource_destroy_listener;
struct wl_signal destroy_signal;
};
/** Buffer requirements broadcasting for a pixel source */
@ -299,6 +301,8 @@ buffer_is_compatible(struct weston_buffer *buffer,
static void
weston_capture_task_destroy(struct weston_capture_task *ct)
{
wl_signal_emit(&ct->destroy_signal, ct);
if (ct->owner->pixel_source != WESTON_OUTPUT_CAPTURE_SOURCE_WRITEBACK &&
ct->owner->output)
weston_output_disable_planes_decr(ct->owner->output);
@ -345,6 +349,8 @@ weston_capture_task_create(struct weston_capture_source *csrc,
if (ct->owner->pixel_source != WESTON_OUTPUT_CAPTURE_SOURCE_WRITEBACK)
weston_output_disable_planes_incr(ct->owner->output);
wl_signal_init(&ct->destroy_signal);
return ct;
}
@ -698,3 +704,16 @@ weston_compositor_add_screenshot_authority(struct weston_compositor *compositor,
listener->notify = (wl_notify_func_t)auth;
wl_signal_add(&compositor->output_capture.ask_auth, listener);
}
/* Add a capture task destroy listener
* \param task The capture task
* \listener The listener to call when the task is destroyed
*
* Add a listener for capture task destruction.
*/
WL_EXPORT void
weston_capture_task_add_destroy_listener(struct weston_capture_task *task,
struct wl_listener *listener)
{
wl_signal_add(&task->destroy_signal, listener);
}

3
libweston/output-capture.h
View file

@ -89,6 +89,9 @@ weston_capture_task_retire_failed(struct weston_capture_task *ct,
void
weston_capture_task_retire_complete(struct weston_capture_task *ct);
void
weston_capture_task_add_destroy_listener(struct weston_capture_task *ct,
struct wl_listener *listener);
/*
* entry point for weston_compositor