internal void AddLayer(LayerBase layer, Int32 zIndex)
{
if(layer == null)
throw new ArgumentNullException();
if(Layers.ContainsValue(layer))
throw new ArgumentException("Duplicate layer added to DrawEngine2d.");
SetRenderRequired();
Layers.Add(zIndex, layer);
}
private void CleanupLayers()
{
LayerBase[] layers = new LayerBase[Layers.Values.Count];
Layers.Values.CopyTo(layers, 0);
foreach(LayerBase layer in layers)
layer.Dispose();
Layers.Clear();
Layers = null;
}
public void RemoveLayer(LayerBase layer)
{
if(layer == null)
throw new ArgumentNullException();
if(!Layers.ContainsValue(layer))
throw new ArgumentException("Unknown layer removal requested from DrawEngine2d.");
SetRenderRequired();
Int32 valueLocation = Layers.IndexOfValue(layer);
Int32 zIndex = Layers.Keys[valueLocation];
Layers.Remove(zIndex);
}