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Electron 中的 desktopCapturer
模块可用于访问 Chromium 的 getUserMedia
web API 中提供的任何媒体, 例如音频, 视频, 屏幕和窗口.github
这个模块有一个版本可用于这两个进程: ipcMain
和 ipcRenderer
.web
在浏览器中查看 完整 API 文档.shell
支持: Win, macOS, Linux | 进程: 渲染器api
此示例使用 desktopCapturer
模块采集正在使用的屏幕, 并建立全屏幕截图.浏览器
点击示例按钮将截取当前屏幕的截图, 并在默认查看器中打开它.electron
渲染器进程ui
const electron = require('electron') const desktopCapturer = electron.desktopCapturer const electronScreen = electron.screen const shell = electron.shell const fs = require('fs') const os = require('os') const path = require('path') const screenshot = document.getElementById('screen-shot') const screenshotMsg = document.getElementById('screenshot-path') screenshot.addEventListener('click', function (event) { screenshotMsg.textContent = '正在采集屏幕...' const thumbSize = determineScreenShotSize() let options = { types: ['screen'], thumbnailSize: thumbSize } desktopCapturer.getSources(options, function (error, sources) { if (error) return console.log(error) sources.forEach(function (source) { if (source.name === 'Entire screen' || source.name === 'Screen 1') { const screenshotPath = path.join(os.tmpdir(), 'screenshot.png') fs.writeFile(screenshotPath, source.thumbnail.toPng(), function (error) { if (error) return console.log(error) shell.openExternal('file://' + screenshotPath) const message = `截图保存到: ${screenshotPath}` screenshotMsg.textContent = message }) } }) }) }) function determineScreenShotSize () { const screenSize = electronScreen.getPrimaryDisplay().workAreaSize const maxDimension = Math.max(screenSize.width, screenSize.height) return { width: maxDimension * window.devicePixelRatio, height: maxDimension * window.devicePixelRatio } }
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