Merge "Improve the circularMask for round displays" into lmp-mr1-dev

import android.graphics.PixelFormat;

import android.graphics.Point;

import android.graphics.PorterDuff;

import android.graphics.PorterDuffXfermode;

import android.graphics.Rect;

import android.view.Display;

import android.view.Surface;

class CircularDisplayMask {

    private static final String TAG = "CircularDisplayMask";

    private static final int STROKE_WIDTH = 2;

    // size of the chin

    private int mScreenOffset = 0;

    // Display dimensions

        mDrawNeeded = true;

        mPaint = new Paint();

        mPaint.setAntiAlias(true);

        mPaint.setStyle(Paint.Style.STROKE);

        mPaint.setColor(Color.BLACK);

        mPaint.setStrokeWidth(STROKE_WIDTH);

        mPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));

        mScreenOffset = screenOffset;

    }

        if (c == null) {

            return;

        }

        c.drawColor(Color.TRANSPARENT, PorterDuff.Mode.SRC);

        switch (mRotation) {

        case Surface.ROTATION_0:

        case Surface.ROTATION_90:

        }

        int circleRadius = mScreenSize.x / 2;

        c.drawCircle(circleRadius, circleRadius, circleRadius, mPaint);

        c.drawColor(Color.BLACK);

        // The radius is reduced by 1 to provide an anti aliasing effect on the display edges.

        c.drawCircle(circleRadius, circleRadius, circleRadius - 1, mPaint);

        mSurface.unlockCanvasAndPost(c);

    }