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overlay: refactor
- Use a single `lab_scene_rect` for both overlay background and outlines,
like I described in the TODO comment in ffd4005.
- Simplify the resource management by destroying the overlay tree when
it's hidden. I think its overhead is pretty minimal.
- Share a single `lab_scene_rect` for both region/edge overlays.
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8 changed files with 51 additions and 154 deletions
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@ -171,7 +171,7 @@ handle_output_destroy(struct wl_listener *listener, void *data)
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regions_evacuate_output(output);
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regions_destroy(seat, &output->regions);
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if (seat->overlay.active.output == output) {
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overlay_hide(seat);
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overlay_finish(seat);
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}
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wl_list_remove(&output->link);
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wl_list_remove(&output->frame.link);
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