Picasso Transformation for Circle Bitmap

gistfile1.java

/**
 * This is a picasso Transformation that can be used as follows
 * 
 * Picasso.with(mContext)
 *      .load(someUrl)
 *      .transform(new CircleTransformation())
 *      .into(yourImageView);
 * 
 * Credits to https://gist.github.com/aprock/6213395 for most of the code
 * /


/**
* Created by kayvan on 3/19/15.
*/
class CircleTransformation implements Transformation {

    @Override
    public Bitmap transform(Bitmap source) {
        final Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setShader(new BitmapShader(source, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP));

        Bitmap output = Bitmap.createBitmap(source.getWidth(), source.getHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(output);
        canvas.drawRoundRect(new RectF(0, 0, source.getWidth(), source.getHeight() ), source.getWidth(), source.getWidth(), paint);

        if (source != output) {
            source.recycle();
        }
        return output;
    }

    @Override
    public String key() {
        return "Circular Image";
    }
}