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monitor-manager: check for underscan setting validity upfront
Instead of doing a roundtrip to the X server before setting it, rely on the previous value fetched before the configuration was sent over DBus. This matches the argument check we already do elsewhere, and will allow us to more easily add an additional condition to determine if underscan is supported. https://gitlab.gnome.org/GNOME/mutter/merge_requests/673
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@ -1649,6 +1649,7 @@ create_monitor_config_from_variant (MetaMonitorManager *manager,
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MetaMonitorModeSpec *monitor_mode_spec;
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g_autoptr (GVariant) properties_variant = NULL;
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gboolean enable_underscanning = FALSE;
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gboolean set_underscanning = FALSE;
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g_variant_get (monitor_config_variant, "(ss@a{sv})",
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&connector,
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@ -1671,7 +1672,18 @@ create_monitor_config_from_variant (MetaMonitorManager *manager,
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return NULL;
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}
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g_variant_lookup (properties_variant, "underscanning", "b", &enable_underscanning);
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set_underscanning =
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g_variant_lookup (properties_variant, "underscanning", "b",
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&enable_underscanning);
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if (set_underscanning)
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{
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if (enable_underscanning && !meta_monitor_supports_underscanning (monitor))
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{
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g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
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"Underscanning requested but unsupported");
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return NULL;
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}
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}
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monitor_spec = meta_monitor_spec_clone (meta_monitor_get_spec (monitor));
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