BookPageView.java 文件源码

/**
 * 绘制B区域内容
 * @param canvas
 * @param pathA
 */
private void drawPathBContent(Canvas canvas, Path pathA){
    canvas.save();
    canvas.clipPath(pathA);//裁剪出A区域
    canvas.clipPath(getPathC(),Region.Op.UNION);//裁剪出A和C区域的全集
    canvas.clipPath(getPathB(), Region.Op.REVERSE_DIFFERENCE);//裁剪出B区域中不同于与AC区域的部分
    canvas.drawBitmap(pathBContentBitmap, 0, 0, null);

    drawPathBShadow(canvas);
    canvas.restore();
}