ReadView.java 文件源码

private void drawCurrentPageArea(Canvas canvas, Bitmap bitmap) {
    mPath1.reset();
    mPath1.moveTo(mBzStart1.x, mBzStart1.y);
    mPath1.quadTo(mBzControl1.x, mBzControl1.y, mBzEnd1.x,
            mBzEnd1.y);
    mPath1.lineTo(mTouch.x, mTouch.y);
    mPath1.lineTo(mBzEnd2.x, mBzEnd2.y);
    mPath1.quadTo(mBzControl2.x, mBzControl2.y, mBzStart2.x,
            mBzStart2.y);
    mPath1.lineTo(mCornerX, mCornerY);
    mPath1.close();

    canvas.save();
    canvas.clipPath(mPath1, Region.Op.XOR);
    canvas.drawBitmap(bitmap, 0, 0, null);
    canvas.restore();
}