const { ccclass, property } = cc._decorator;  @ccclass export default class ScreenshotCtrl extends cc.Component {       @property(cc.Node)     ScreenshotNode: cc.Node = null;      onScreenshot() {         this.captureScreen(this.node)     }       public getCameraTexture(node: cc.Node): cc.RenderTexture {         let camera = node.addComponent(cc.Camera);         // 设置你想要的截图内容的 cullingMask         camera.cullingMask = 0xffffffff;         camera.clearFlags = cc.Camera.ClearFlags.STENCIL | cc.Camera.ClearFlags.DEPTH;         camera.depth = 0;         camera.rect = cc.rect(0, 0, 1, 1);         camera.zoomRatio = Math.min(cc.winSize.height / node.height, cc.winSize.width / node.width)          // 新建一个 RenderTexture，并且设置 camera 的 targetTexture 为新建的 RenderTexture，这样 camera 的内容将会渲染到新建的 RenderTexture 中。         let texture = new cc.RenderTexture();         texture.initWithSize(node.width, node.height);         camera.targetTexture = texture;         camera.render(node);         //移除相机组件并且销毁相机         node.removeComponent(camera);         camera.destroy();         return texture;     }     /**          * 截屏          * @param {*摄像机 cc.Camera类型} camera           */     screenShot(node) {         const texture: cc.RenderTexture = this.getCameraTexture(node)         let canvas = null;         //第一步------>给摄像机指定渲染目标 不直接渲染到屏幕上         //第二步----->创建并渲染画布         let width = texture.width;         let height = texture.height;         if (canvas == null) {             //创建canvas             canvas = document.createElement('canvas');             canvas.width = width;             canvas.height = height;         } else {             //清理画布上指定矩形区域内的像素             canvas.getContext('2d').clearRect(0, 0, canvas.width, canvas.height);         }         //返回值 ctx 一个 CanvasRenderingContext2D 对象，使用它可以绘制到 Canvas 元素中。         let ctx = canvas.getContext('2d');         //readPixels 方法 从 render texture 读取像素数据         let data = texture.readPixels();         //把从摄像机读取的像素 渲染到canvas画布上去         let rowBytes = width * 4;         for (let row = 0; row < height; row++) {             let srow = row;             let imageData = ctx.createImageData(width, 1);//创建新的空白 ImageData 对象             let start = srow * width * 4;             for (let i = 0; i < rowBytes; i++) {                 imageData.data[i] = data[start + i];             }             ctx.putImageData(imageData, 0, height - row - 1);//将图像数据拷贝回画布上         }          let a = document.createElement("a");         a.download = "test1.png";         a.href = canvas.toDataURL("image/png");         a.click();     }      /**         * @description 截图         * @param screenshotNode 截图节点         * @returns 存放截图的本地路径         * 注意1.全屏截图需要添加自适应组件         *  2.带透明的需要存储png格式（会出现亮斑）         *  3需要占用内存少，不被透明度营销就存储为.jpg格式         */     public captureScreen(screenshotNode: cc.Node): Promise {         return new Promise((resolve, reject) => {             const renderTexture = this.getCameraTexture(screenshotNode)             const imgData = renderTexture.readPixels()             if (CC_JSB) {   //CC_JBS标志是原生平台                 const shareImgRootPath = `${jsb.fileUtils.getWritablePath()}ShareImg/`                 const imgFilePath = shareImgRootPath + "_shareImg.jpg"                 console.log(`imgFilePath:`, imgFilePath);                 //@ts-ignore                 const success = jsb.saveImageData(imgData, screenshotNode.width, screenshotNode.height, imgFilePath)                 //文件写成功之后，返回图片存储的路径                 if (success) {                     resolve(imgFilePath)                 }                 else {                     console.log(`save imgData failed! path:`, imgFilePath);                     reject(null)                 }             }             else {                 this.screenShot(this.ScreenshotNode)             }         })     }  }