private static void PropagateLayer(VisualNode node, SceneLayer layer, SceneLayer oldLayer)
{
node.LayerRoot = layer.LayerRoot;
layer.Dirty.Add(node.Bounds);
oldLayer.Dirty.Add(node.Bounds);
foreach (VisualNode child in node.Children)
{
// If the child is not the start of a new layer, recurse.
if (child.LayerRoot != child.Visual)
{
PropagateLayer(child, layer, oldLayer);
}
}
}
private static void UpdateLayer(VisualNode node, SceneLayer layer)
{
layer.Opacity = node.Visual.Opacity;
if (node.Visual.OpacityMask != null)
{
layer.OpacityMask = node.Visual.OpacityMask?.ToImmutable();
layer.OpacityMaskRect = node.ClipBounds;
}
else
{
layer.OpacityMask = null;
layer.OpacityMaskRect = Rect.Empty;
}
layer.GeometryClip = node.HasAncestorGeometryClip ?
CreateLayerGeometryClip(node) :
null;
}
