title: Android BlurMaskFilter has no effect in canvas.drawOval while text is blurred
body: <p>I've been trying to create a custom view which has blurred shapes under text. The problem is that the BlurMaskFilter has no effect on any shape that I draw on the canvas. Here is how I'm initialising the Paint objects in the constructor:</p>
  
  <pre><code>paint = new Paint(0);
  paint.setColor(0xffffffff);
  paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
  
  mShadowPaint = new Paint(0);
  mShadowPaint.setColor(0xff333333);
  mShadowPaint.setMaskFilter(new BlurMaskFilter(10, BlurMaskFilter.Blur.NORMAL));
  </code></pre>
  
  <p>And I'm calling the functions like this in onDraw():</p>
  
  <pre><code>canvas.drawOval(mShadowBounds,mShadowPaint);
  canvas.drawText("hello", x, y, paint);
  </code></pre>
  
  <p>But this is what I see.</p>
  
  <p><img src="https://i.stack.imgur.com/hZlId.png" alt="The Oval is not blurred yet the text is blurred."></p>
  
  <p>Using android 4.0 sdk and testing on a 4.0.4 galaxy nexus device (UK). I'm wondering if this is a bug in 4.0.4 as I did test it on the emulator with 4.0 and 4.0.3 and it did blur perfectly well on them, unless I'm doing something completely wrong?</p>
  
  <p>EDIT: Here is the extended View code to test it on other platforms.</p>
  
  <pre><code>import android.content.Context;
  import android.graphics.BlurMaskFilter;
  import android.graphics.Canvas;
  import android.graphics.Paint;
  import android.graphics.RectF;
  import android.util.AttributeSet;
  import android.view.View;
  
  public class BlurTestView extends View{
  
      private Paint paint;
      private Paint mShadowPaint;
      private int size = 100;
      private RectF mShadowBounds = new RectF();
  
      public BlurTestView(Context context) {
          this(context, null, 0);
      }
  
      public BlurTestView(Context context, AttributeSet attrs) {
          this(context, attrs, 0);
      }
  
      public BlurTestView(Context context, AttributeSet attrs, int defStyle) {
          super(context, attrs, defStyle);
          paint = new Paint(0);
          paint.setColor(0xff333333);
          paint.setTextSize(size);
          paint.setMaskFilter(new BlurMaskFilter(8, BlurMaskFilter.Blur.NORMAL));
  
          mShadowPaint = new Paint(0);
          mShadowPaint.setColor(0xff333333);
          mShadowPaint.setMaskFilter(new BlurMaskFilter(10, BlurMaskFilter.Blur.NORMAL));
  
          mShadowBounds.top = size;
          mShadowBounds.bottom = mShadowBounds.top+(size /2);
          mShadowBounds.left = 0;
          mShadowBounds.right = (int)paint.measureText("hello");
      }
  
      @Override
      public void onDraw(Canvas canvas)
      {
          canvas.drawOval(mShadowBounds,mShadowPaint);
          canvas.drawText("hello", 0, size, paint);
      }
  
  }
  </code></pre>