only clip circle once

Author: Daniel Bejan

library/src/com/github/mmin18/widget/RealtimeBlurView.java

@@ -37,7 +37,7 @@ public class RealtimeBlurView extends View {
 	private Bitmap mBitmapToBlur, mBlurredBitmap;
 	private Canvas mBlurringCanvas;
 	private boolean mIsRendering;
-	private boolean mIsCircle = false;
+	private boolean mIsCircle = false, isCircleDrawn = false;
 	private Paint mPaint;
 	private final Rect mRectSrc = new Rect(), mRectDst = new Rect();
 	// mDecorView should be the root view of the activity (even if you are on a different window like a dialog)
@@ -273,7 +273,8 @@ public boolean onPreDraw() {
 					mBlurringCanvas.restoreToCount(rc);
 				}
 
-				if(mIsCircle) {
+				if(mIsCircle && !isCircleDrawn) {
+					isCircleDrawn = true
 					mBitmapToBlur = getBitmapClippedCircle(mBitmapToBlur);
 				}