Picasso blur transformation using render script xamarin android

Blur Transformation

public class BlurTransformation : Java.Lang.Object, ITransformation
        {
            /**
           * Max blur Radius supported by the Renderscript library
           **/
            protected static int MaxRadius = 25;
            /**
            * Min blur Radius supported by the Renderscript library
            **/
            protected static int MinRadius = 1;
            /**
             * Application Context to instantiate the Renderscript
             **/
            protected Context Context;
            /**
            * Selected Radius
             **/
            protected int Radius;

            /**
            * Creates a new Blur transformation
            * 
            * @param Context Application Context to instantiate the Renderscript
            **/

            public BlurTransformation(Context context, int radius)
            {
                this.Context = context;
                this.Radius = radius < MinRadius
                    ? MinRadius
                    : radius > MaxRadius ? MaxRadius : radius;
            }

            public Bitmap Transform(Bitmap source)
            {
                // Load a clean bitmap and work from that.
                var originalBitmap = source;

                // Create another bitmap that will hold the results of the filter.
                Bitmap blurredBitmap = null;
                blurredBitmap = Bitmap.CreateBitmap(originalBitmap);

                // Create the Renderscript instance that will do the work.
                var rs = RenderScript.Create(Context);

                // Allocate memory for Renderscript to work with
                var input = Allocation.CreateFromBitmap(rs, originalBitmap, Allocation.MipmapControl.MipmapFull,
                    AllocationUsage.Script);
                var output = Allocation.CreateTyped(rs, input.Type);

                // Load up an instance of the specific script that we want to use.
                var script = ScriptIntrinsicBlur.Create(rs, Element.U8_4(rs));
                script.SetInput(input);
                // Set the blur radius
                script.SetRadius(Radius);

                // Start the ScriptIntrinisicBlur
                script.ForEach(output);
                // Copy the output to the blurred bitmap
                output.CopyTo(blurredBitmap);

                source.Recycle();
                return blurredBitmap;
            }

            public string Key => "blurred";
        }