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output-layers: change semantics of wlr_output_state.layers

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Previously, we were requiring all layers to be included in
wlr_output_state.layers and wlr_output_layer_state.buffer to be
set to NULL to disable a layer.

This commit changes these semantics: disabled layers are left out
of wlr_output_state.layers, and wlr_output_layer_state.buffer is
required to be non-NULL.

This new API should make it easier for callers to populate the
layers, at the cost of some additional complexity in backends,
mostly addressed by introducing a new
wlr_output_state_is_layer_enabled() helper.
This commit is contained in:
Simon Ser 2023-06-12 17:15:16 +02:00
parent f42920c414
commit b931ac9ac0
8 changed files with 120 additions and 71 deletions
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6
backend/drm/drm.c
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@ -804,11 +804,7 @@ static bool drm_connector_set_pending_layer_fbs(struct wlr_drm_connector *conn,
return false;
}
if (layer_state->buffer != NULL) {
drm_fb_import(&layer->pending_fb, drm, layer_state->buffer, NULL);
} else {
drm_fb_clear(&layer->pending_fb);
}
drm_fb_import(&layer->pending_fb, drm, layer_state->buffer, NULL);
}
return true;