border_transformation_for_glide

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapShader;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Shader;

import com.bumptech.glide.load.engine.bitmap_recycle.BitmapPool;
import com.bumptech.glide.load.resource.bitmap.BitmapTransformation;
/**
 * Created by Simar on 02-05-2018.
 */
public class CircularTransformWhite extends BitmapTransformation {
    public CircularTransformWhite(Context context) {
        super(context);
    }

    @Override protected Bitmap transform(BitmapPool pool, Bitmap bitmap, int outWidth, int outHeight) {
        return circleCrop(pool, bitmap);
    }

    private static Bitmap circleCrop(BitmapPool pool, Bitmap bitmap) {
        if (bitmap == null) return null;
        final int borderWidth=6;

        final int width = bitmap.getWidth() + borderWidth;
        final int height = bitmap.getHeight() + borderWidth;

        Bitmap canvasBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
        BitmapShader shader = new BitmapShader(bitmap, Shader.TileMode.CLAMP, Shader.TileMode.CLAMP);
        Paint paint = new Paint();
        paint.setAntiAlias(true);
        paint.setShader(shader);


        Canvas canvas = new Canvas(canvasBitmap);
        float radius = width > height ? ((float) height) / 2f : ((float) width) / 2f;
        canvas.drawCircle(width / 2, height / 2, radius, paint);
        paint.setShader(null);
        paint.setStyle(Paint.Style.STROKE);
        paint.setColor(Color.WHITE);
        paint.setStrokeWidth(borderWidth);
        canvas.drawCircle(width / 2, height / 2, radius - borderWidth / 2, paint);
        if (canvasBitmap != bitmap) {
            bitmap.recycle();
        }

        return canvasBitmap;

    }

    @Override public String getId() {
        return getClass().getName();
    }
}