Image remove/clear effect in openGL Android

I have a code from my game that do followed thing:

remove image from the screen by touch (only touched area, not all image).

and after finger move:

Paint pTouch; int X = 100; int Y = 100; Bitmap overlay; Canvas c2; Rect dest;          pTouch = new Paint(Paint.ANTI_ALIAS_FLAG);                  pTouch.setXfermode(new PorterDuffXfermode(Mode.SRC_OUT));          pTouch.setColor(Color.TRANSPARENT);         pTouch.setMaskFilter(new BlurMaskFilter(15, Blur.NORMAL));          overlay = BitmapFactory.decodeResource(getResources(),R.drawable.wraith_spell).copy(Config.ARGB_8888, true);           c2 = new Canvas(overlay);          dest = new Rect(0, 0, getWidth(), getHeight());         Paint paint = new Paint();                  paint.setFilterBitmap(true);            ...          @Override         protected void onDraw(Canvas canvas) {          ...          c2.drawCircle(X, Y, 80, pTouch);         canvas.drawBitmap(overlay, 0, 0, null);          ...         }            @Override public boolean onTouchEvent(MotionEvent event) {          switch (event.getAction()) {         case MotionEvent.ACTION_DOWN:         case MotionEvent.ACTION_MOVE: {             X = (int) event.getX();             Y = (int) event.getY();               invalidate();             c2.drawCircle(X, Y, 80, pTouch);                                break;         }            }              return true; }             ... 

Actually, what I do here is draw transparent layer upon the red Ball.

Does anybody knows how to implement the same in OpenGL ES 2D?

Any link, direction, snippets of code?

Thank you

Source: http://gamedev.stackexchange.com/questions/59535/image-remove-clear-effect-in-opengl-android

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