public override BitmapBase Apply(RenderTask renderTask, BitmapBase layer)
{
Tank tank = renderTask.Tank;
if (_blur == null || _blur.Radius != Radius)
{
lock (this)
if (_blur == null || _blur.Radius != Radius)
{
_blur = new GaussianBlur(Radius);
}
}
BitmapBase shadow = layer.ToBitmapRam();
var color = Color.GetColorWpf(tank);
shadow.ReplaceColor(color);
shadow.Blur(_blur, BlurEdgeMode.Transparent);
shadow.ScaleOpacity(Spread, OpacityStyle.Additive);
shadow.Transparentize(color.A);
layer.DrawImage(shadow, below: true);
return(layer);
}