/// <param name="celAlphaMasks">Fill with masks created from Cels</param>
/// <param name="allMasks">Fill with all created masks</param>
public void RegenerateAlphaMask()
{
masks.TryRemoveBaseFallBack(); // <- it is about to be regenerated
// If this frame has a single sprite-containing Cel, generate it directly
if (firstLayer != null && firstLayer.next == null)
{
Mask mask = new Mask
{
data = firstLayer.spriteRef.ResolveRequire().GetAlphaMask(),
isGeneratedAlphaMask = true,
};
masks.Add(new TagSet(), mask);
}
else // ... Otherwise, try to create a mask merged from the frame's layers
{
List <MaskData> layerMasks = new List <MaskData>();
foreach (var cel in layers)
{
MaskData maskData = cel.spriteRef.ResolveRequire().GetAlphaMask();
if (maskData.Width != 0 && maskData.Height != 0)
{
layerMasks.Add(maskData);
}
}
Rectangle maxBounds = Rectangle.Empty;
foreach (var maskData in layerMasks)
{
maxBounds = RectangleExtensions.UnionIgnoreEmpty(maxBounds, maskData.Bounds);
}
Mask mask = new Mask()
{
isGeneratedAlphaMask = true
};
mask.data = new MaskData(maxBounds);
foreach (var layerMask in layerMasks)
{
Debug.Assert(!Asserts.enabled || mask.data.Bounds.Contains(layerMask.Bounds));
mask.data.SetBitwiseOrFrom(layerMask);
}
masks.Add(new TagSet(), mask);
}
}
