mirror of
https://github.com/jiawanlong/Cesium-Examples.git
synced 2025-11-04 09:14:17 +00:00
303 lines
11 KiB
JavaScript
303 lines
11 KiB
JavaScript
(function(){
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var PrintMap = {};
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var LAYER_COUNT = 0;
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var LAYER_LENGTH = 0;
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window.MapToImg = PrintMap;
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PrintMap.excute = function(map){
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var canvas = document.createElement("canvas");
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var broz = SuperMap.Browser.name;
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if(!canvas.getContext||(broz=='msie'&&!canvas.msToBlob)){
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alert("您的浏览器版本太低，请升级。");
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return;
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}
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if(document.location.toString().match(/file:\/\//)){
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alert("该功能需要在服务器中发布出来后，方可使用");
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return;
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}
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LAYER_COUNT = 0;
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var layers = map.layers.concat([]);
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//layers排序，将markers放到最上边
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var layers1 = [];
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for(var i=0;i<layers.length;){
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if(layers[i].CLASS_NAME == "SuperMap.Layer.Markers"){
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var templayer = layers.splice(i,1);
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layers1.push(templayer[0]);
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} else if(layers[i].CLASS_NAME == "SuperMap.Layer.GOAnimationLayer" ||
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layers[i].CLASS_NAME == "SuperMap.Layer.PlottingLayer.Temporary" ||
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(layers[i].CLASS_NAME == "SuperMap.Layer.PlottingLayer" && !layers[i].getVisibility()) ||
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layers[i].CLASS_NAME == "SuperMap.Layer.PlottingLayer.RootContainer"){
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//处理标绘图层的动画图层和图层不显示
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layers.splice(i,1);
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} else {
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i++;
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}
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}
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layers = layers.concat(layers1);
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LAYER_LENGTH = layers.length;
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var imgUrls = [];
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for(var i=0;i<layers.length;i++){
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var layer = layers[i];
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if(layer.CLASS_NAME == "SuperMap.Layer.TiledDynamicRESTLayer"){
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if(layer.useCanvas==false){
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draw(getImgLayerData(layer,map),i,imgUrls);
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}
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else{
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draw(getCanvasLayerData(layer),i,imgUrls);
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}
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}
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else if(layer.CLASS_NAME == "SuperMap.Layer.Markers"){
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draw(getImgLayerData(layer,map),i,imgUrls);
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}
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else if(layer.CLASS_NAME == "SuperMap.Layer.Vector"){
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getVectorLayerData(layer,map,function(imgUrls,i){
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return function(img){
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draw(img,i,imgUrls);
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}
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}(imgUrls,i))
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}
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else if(layer.CLASS_NAME == "SuperMap.Layer.PlottingLayer"){
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getPlottingLayerData(layer,map,function(imgUrls,i){
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return function(img){
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draw(img,i,imgUrls);
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}
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}(imgUrls,i))
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}
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}
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};
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function draw(img,i,imgUrls){
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imgUrls[i] = img;
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LAYER_COUNT++;
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if(LAYER_COUNT>=LAYER_LENGTH){
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var canvas = document.createElement("canvas");
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var size = map.getSize();
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canvas.height = size.h;
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canvas.width = size.w;
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var ctx = canvas.getContext("2d");
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canvas.style.position = "relative";
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canvas.style.border = "1px solid #4c4c4c";
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//document.body.appendChild(canvas);
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var panel = document.createElement("div");
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panel.style.position = "absolute";
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panel.style.left = "0px";
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panel.style.top = "0px";
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panel.style.height = "100%";
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panel.style.width = "100%";
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// panel.style.background = "#e6e8eb";
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panel.style.background = "#ffffff";
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document.body.appendChild(panel);
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var buttonPanel = document.createElement("div");
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buttonPanel.style.position = "relative";
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panel.appendChild(buttonPanel);
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panel.appendChild(canvas);
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window.setTimeout(function(){
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for(var i=0;i<imgUrls.length;i++){
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ctx.drawImage(imgUrls[i],0,0);
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}
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if(canvas.msToBlob){
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var button = document.createElement("input");
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buttonPanel.appendChild(button);
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button.type = "button";
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button.value = "保存";
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button.onclick = function(){
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window.navigator.msSaveBlob(canvas.msToBlob(), 'map.png');
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}
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}
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else{
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var aa = document.createElement("a");
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buttonPanel.appendChild(aa);
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aa.target = "_blank";
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aa.download="map.png";
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aa.href=canvas.toDataURL();
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var button = document.createElement("input");
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aa.appendChild(button);
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button.type = "button";
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button.value = "保存";
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}
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var button = document.createElement("input");
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buttonPanel.appendChild(button);
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button.type = "button";
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button.value = "关闭";
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button.onclick = function(){
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document.body.removeChild(panel);
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}
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},30);
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}
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}
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//截取图片图层
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function getImgLayerData(layer,map){
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var div = layer.div;
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var pdiv = div.parentNode;
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var offsetX = parseInt(pdiv.style.left.replace(/px/,""));
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var offsetY = parseInt(pdiv.style.top.replace(/px/,""));
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var canvas = document.createElement("canvas");
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var size = map.getSize();
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canvas.height = size.h;
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canvas.width = size.w;
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var ctx = canvas.getContext("2d");
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canvas.style.position = "absolute";
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canvas.style.left = "5px";
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canvas.style.top = "600px";
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canvas.style.border = "1px solid #f00";
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//document.body.appendChild(canvas);
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var divs = div.getElementsByTagName("div");
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for(var i=0;i<divs.length;i++){
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var div1 = divs[i];
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if(div1.style.display!="none"){
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var left = parseInt(div1.style.left.replace(/px/,""));
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var top = parseInt(div1.style.top.replace(/px/,""));
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var img = div1.getElementsByTagName("img")[0];
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var imgWidth = img.style.width;
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var imgHeight = img.style.height;
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var imgW = null,imgH = null;
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if(imgWidth!=null||imgWidth!=""){
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imgW = parseInt(imgWidth.replace(/px/,""));
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}
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if(imgHeight!=null||imgHeight!=""){
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imgH = parseInt(imgHeight.replace(/px/,""));
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}
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if(imgW!=null&&imgH!=null){
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ctx.drawImage(img,left+offsetX,top+offsetY,imgW,imgH);
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}
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else{
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ctx.drawImage(img,left+offsetX,top+offsetY);
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}
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}
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}
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var imageUrl = canvas.toDataURL("image/png");
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var img = new Image();
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img.src = imageUrl;
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return img;
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}
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//截取canvas图层
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function getCanvasLayerData(layer){
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var div = layer.div;
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var canvas0 = div.getElementsByTagName("canvas")[0];
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var imageUrl = canvas0.toDataURL("image/png");
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var img = new Image();
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img.src = imageUrl;
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return img;
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}
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//截取Vector图层
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function getVectorLayerData(layer,map,callback){
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var printLayer,
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strategies = [],
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features1 = [],
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features = layer.features,
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layerStrategies = layer.strategies;
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//GeoText无法截图问题修复
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if(layerStrategies){
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for(var i = 0; i<layerStrategies.length; i++){
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if (layerStrategies[i].CLASS_NAME === "SuperMap.Strategy.GeoText"){
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strategies.push(layerStrategies[i].clone());
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}else{
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strategies.push(layerStrategies[i]);
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}
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}
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printLayer = new SuperMap.Layer.Vector("PRINT_LAYER", {strategies: strategies, visibility: true, renderers: ["Canvas"]});
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}else{
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printLayer = new SuperMap.Layer.Vector("PRINT_LAYER", {visibility: true, renderers: ["Canvas"]});
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}
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map.addLayer(printLayer);
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for(var j=0;j<features.length;j++){
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var feature = features[j];
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var feature1 = new SuperMap.Feature.Vector();
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feature1.geometry = feature.geometry.clone();
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feature1.style = feature.style;
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features1.push(feature1);
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}
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if(layer.style){
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printLayer.style = layer.style;
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}
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printLayer.setOpacity(0);
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printLayer.addFeatures(features1);
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window.setTimeout(function(printLayer,map,callback){
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return function(){
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var div = printLayer.div;
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var canvas1 = div.getElementsByTagName("canvas")[0];
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var cxt1 = canvas1.getContext("2d");
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var imageUrl = canvas1.toDataURL("image/png");
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map.removeLayer(printLayer);
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printLayer.destroy();
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var img = new Image();
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img.src = imageUrl;
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callback(img);
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}
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}(printLayer,map,callback),30);
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}
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//截取Plotting图层
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function getPlottingLayerData(layer,map,callback){
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var printLayer,
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features1 = [],
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features = layer.features,
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printLayer = new SuperMap.Layer.PlottingLayer("PRINT_LAYER", layer.serverUrl, {visibility: true, renderers: ["Canvas"]});
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//printLayer.spatialAnalystUrl = layer.spatialAnalystUrl;
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map.addLayer(printLayer);
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for(var j=0;j<features.length;j++){
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if(features[j].geometry instanceof SuperMap.Geometry.PlottingGeometry){
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var feature = features[j];
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var feature1 = SuperMap.Plot.PlottingUtil.copyFeature(feature);
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features1.push(feature1);
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} else {
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var feature1 = new SuperMap.Feature.Vector();
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feature1.geometry = features[j].geometry.clone();
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feature1.style = features[j].style;
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features1.push(feature1);
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}
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}
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if(layer.style){
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printLayer.style = layer.style;
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}
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printLayer.setOpacity(0);
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printLayer.addFeatures(features1);
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window.setTimeout(function(printLayer,map,callback){
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return function(){
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var div = printLayer.div;
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var canvas1 = div.getElementsByTagName("canvas")[0];
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var cxt1 = canvas1.getContext("2d");
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var imageUrl = canvas1.toDataURL("image/png");
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map.removeLayer(printLayer);
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printLayer.destroy();
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var img = new Image();
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img.src = imageUrl;
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callback(img);
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}
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}(printLayer,map,callback),30);
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}
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})(); |