internal CompositionLayer(ILottieDrawable lottieDrawable, Layer layerModel, List <Layer> layerModels, LottieComposition composition) : base(lottieDrawable, layerModel)
{
var timeRemapping = layerModel.TimeRemapping;
if (timeRemapping != null)
{
_timeRemapping = timeRemapping.CreateAnimation();
AddAnimation(_timeRemapping);
_timeRemapping.ValueChanged += OnValueChanged;
}
else
{
_timeRemapping = null;
}
var layerMap = new Dictionary <long, BaseLayer>(composition.Layers.Count);
BaseLayer mattedLayer = null;
for (var i = layerModels.Count - 1; i >= 0; i--)
{
var lm = layerModels[i];
var layer = ForModel(lm, lottieDrawable, composition);
if (layer == null)
{
continue;
}
layerMap[layer.LayerModel.Id] = layer;
if (mattedLayer != null)
{
mattedLayer.MatteLayer = layer;
mattedLayer = null;
}
else
{
_layers.Insert(0, layer);
switch (lm.GetMatteType())
{
case Layer.MatteType.Add:
case Layer.MatteType.Invert:
mattedLayer = layer;
break;
}
}
}
foreach (var layer in layerMap)
{
var layerView = layer.Value;
// This shouldn't happen but it appears as if sometimes on pre-lollipop devices when
// compiled with d8, layerView is null sometimes.
// https://github.com/airbnb/lottie-android/issues/524
if (layerView == null)
{
continue;
}
if (layerMap.TryGetValue(layerView.LayerModel.ParentId, out BaseLayer parentLayer))
{
layerView.ParentLayer = parentLayer;
}
}
}