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surface: add WLR_SURFACE_STATE_SUBSURFACES #3170
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This allows to figure out when the subsurface list has changed: subsurface added, removed, or re-ordered. In the case where the subsurface list hasn't changed, some book-keeping operations can be skipped.
Also add a small TODO.
vyivel
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Sep 6, 2021
| wl_list_remove(&subsurface->surface_destroy.link); | ||
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| if (subsurface->parent) { | ||
| subsurface->parent->pending.committed |= WLR_SURFACE_STATE_SUBSURFACES; |
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Subsurfaces are destroyed instantly, their removal isn't double-buffered.
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Yes, but I'd still like to give the caller a chance to figure out that the subsurface list changed…
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I think callers should simply listen to new_subsurface/destroy signals, and WLR_SURFACE_STATE_SUBSURFACES should be left as an optimization thing.
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wlroots has migrated to gitlab.freedesktop.org. This pull request has been moved to: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/3170 |
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This allows to figure out when the subsurface list has changed:
subsurface added, removed, or re-ordered. In the case where
the subsurface list hasn't changed, some book-keeping operations
can be skipped.
Useful for #3128
cc @vyivel