function watermark(settings) {
	
	if(settings != null && settings != undefined && settings !="" ){
		var _settings = JSON.parse(settings);
		
		if(_settings.waterMarkPicUrl != null && _settings.waterMarkPicUrl != undefined &&  _settings.waterMarkPicUrl != ""){
			var waterMarkObj = {};
			waterMarkObj.watermark_path = _settings.waterMarkPicUrl;
			setImgWaterMark(waterMarkObj);
		}
		if(_settings.waterMarkStr != null && _settings.waterMarkStr != undefined &&  _settings.waterMarkStr != ""){
			var waterMarkObj = {};
			waterMarkObj.watermark_txt = _settings.waterMarkStr;
			setTextWaterMark(waterMarkObj);
		}
		
	}
	
	function setImgWaterMark(settings){
	    //获取页面最大宽度
	    var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth);
	    //获取页面最大长度
	    var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight);
	    
	    var oTemp = document.createDocumentFragment();
	    
	    var waterMarkPicUrl= path +"/"+ settings.watermark_path; 
	    
	    var image = new Image();
        image.src = waterMarkPicUrl;
        

		// 等图片加载完成再显示图片
		image.onload = function() {
			var img_width = image.width;
			img_width = img_width > page_width ? page_width - 30 : img_width;
			var img_height = image.height;
			var newMark = document.createElement('div');
			
			newMark.id = "waterMark";
			newMark.style.position = "absolute";
			newMark.style.top = 0;
			newMark.style.left = 0;
			newMark.style.opacity = "0.3";
			newMark.style.width = img_width > page_width ? page_width - 30 : img_width;
			newMark.style.height = img_height;
			newMark.style.background = "url(" + waterMarkPicUrl + ") center no-repeat";
			newMark.style.filter = "alpha(opacity=50)";
			
			oTemp.appendChild(newMark);
			document.body.appendChild(oTemp);
		};
		image.onerror = function() {
			console.log("error!")
		};
	}
	
	// 文字水印
	function setTextWaterMark(settings){
		// 默认设置
		var defaultSettings={
			watermark_txt:"",
			watermark_x:0,//水印起始位置x轴坐标
			watermark_y:0,//水印起始位置Y轴坐标
			watermark_rows:3,//水印行数
			watermark_cols:2,//水印列数
			watermark_x_space:100,//水印x轴间隔
			watermark_y_space:200,//水印y轴间隔
			watermark_color:'#000000',//水印字体颜色
			watermark_alpha:0.2,//水印透明度
			watermark_fontsize:'2em',//水印字体大小
			watermark_font:'微软雅黑',//水印字体
			watermark_width:100,//水印宽度
			watermark_height:60,//水印长度
			watermark_angle:25//水印倾斜度数
		};
		//采用配置项替换默认值，作用类似jquery.extend
		if(arguments.length===1&&typeof arguments[0] ==="object" )
		{
			var src=arguments[0]||{};
			for(key in src)
			{
				if(src[key]&&defaultSettings[key]&&src[key]===defaultSettings[key])
					continue;
				else if(src[key])
					defaultSettings[key]=src[key];
			}
		}


		//获取页面最大宽度
		var page_width = Math.max(document.body.scrollWidth,document.body.clientWidth);
		//获取页面最大长度
		// var page_height = Math.max(document.body.scrollHeight,document.body.clientHeight);

		var page_height = jQuery(".pdfViewer").find(".canvasWrapper").height();
		page_width=jQuery(".pdfViewer").find(".canvasWrapper").width();

		defaultSettings.watermark_y_space=page_height/defaultSettings.watermark_rows;
		defaultSettings.watermark_x_space=page_width/defaultSettings.watermark_cols;

		//如果将水印列数设置为0，或水印列数设置过大，超过页面最大宽度，则重新计算水印列数和水印x轴间隔
		if (defaultSettings.watermark_cols == 0 ||
			(parseInt(defaultSettings.watermark_x
				+ defaultSettings.watermark_width *defaultSettings.watermark_cols
				+ defaultSettings.watermark_x_space * (defaultSettings.watermark_cols - 1))
				> page_width)) {
			defaultSettings.watermark_cols =
				parseInt((page_width
					-defaultSettings.watermark_x
					+defaultSettings.watermark_x_space)
					/ (defaultSettings.watermark_width
						+ defaultSettings.watermark_x_space));
			defaultSettings.watermark_x_space =
				parseInt((page_width
					- defaultSettings.watermark_x
					- defaultSettings.watermark_width
					* defaultSettings.watermark_cols)
					/ (defaultSettings.watermark_cols - 1));
		}
		//如果将水印行数设置为0，或水印行数设置过大，超过页面最大长度，则重新计算水印行数和水印y轴间隔
		if (defaultSettings.watermark_rows == 0 ||
			(parseInt(defaultSettings.watermark_y
				+ defaultSettings.watermark_height * defaultSettings.watermark_rows
				+ defaultSettings.watermark_y_space * (defaultSettings.watermark_rows - 1))
				> page_height)) {
			defaultSettings.watermark_rows =
				parseInt((defaultSettings.watermark_y_space
					+ page_height - defaultSettings.watermark_y)
					/ (defaultSettings.watermark_height + defaultSettings.watermark_y_space));
			defaultSettings.watermark_y_space =
				parseInt((page_height
					- defaultSettings.watermark_y
					- defaultSettings.watermark_height
					* defaultSettings.watermark_rows)
					/ (defaultSettings.watermark_rows - 1));
		}

		var x;
		var y;
		var oTemp = document.createDocumentFragment();

		for (var i = 0; i < defaultSettings.watermark_rows; i++) {
			y = defaultSettings.watermark_y + (defaultSettings.watermark_y_space + defaultSettings.watermark_height) * i;
			for (var j = 0; j < defaultSettings.watermark_cols; j++) {
				x = defaultSettings.watermark_x + (defaultSettings.watermark_width + defaultSettings.watermark_x_space) * j;

				var mask_div = document.createElement('div');
				mask_div.id = 'mask_div' + i + j;
				mask_div.appendChild(document.createTextNode(defaultSettings.watermark_txt));
				//设置水印div倾斜显示
				mask_div.style.webkitTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
				mask_div.style.MozTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
				mask_div.style.msTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
				mask_div.style.OTransform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
				mask_div.style.transform = "rotate(-" + defaultSettings.watermark_angle + "deg)";
				mask_div.style.visibility = "";
				mask_div.style.position = "absolute";
				mask_div.style.left = x + 'px';
				mask_div.style.top = y + 'px';
				mask_div.style.overflow = "hidden";
				mask_div.style.opacity = defaultSettings.watermark_alpha;
				mask_div.style.fontSize = defaultSettings.watermark_fontsize;
				mask_div.style.fontFamily = defaultSettings.watermark_font;
				mask_div.style.color = defaultSettings.watermark_color;
				mask_div.style.textAlign = "center";
				mask_div.style.width = '400px';
				mask_div.style.height ='200px';
				mask_div.style.display = "block";
				oTemp.appendChild(mask_div);
				jQuery(".pdfViewer").find(".page").append(jQuery(mask_div));
			};
		};

	}

}

function watermark1(setting){
	var mask_div = document.createElement('div');
		mask_div.id = 'mask_div1';
		mask_div.appendChild(document.createTextNode(setting.watermark_txt));
		mask_div.style.position = "absolute";
		mask_div.style.left =  '20px';
		mask_div.style.top =  '20px';
		mask_div.style.overflow = "hidden";
		mask_div.style.zIndex = "9999";
		mask_div.style.opacity = 0.3;
		document.body.appendChild(mask_div);
}
