本文介绍Google Chromium 项目的基本知识,澄清 Chromium, Chrome, WebView 等产品关系。

Chromium 项目中的产品

Google Chromium 项目包含几个产品,他们之间关系如下。

  • Chrome浏览器: 谷歌Chrome浏览器。
  • Chromium 开源项目: Chrome浏览器部分开源代码,Chrome浏览器还有一些闭源代码。
  • Blink:基于WebKit fork出来的Web渲染引擎(Web渲染包含DOM树解析、图层合成、图形绘制)。
  • CEF(Chromium Embed Framework): 基于Chromium基础上封装的浏览器框架,使用此框架可以开发一个浏览器应用
  • Android WebView: Android 内置的浏览器View,是Google的闭源产品,基于Blink内核。

Chromium 架构

Chromium 采用多进程架构,每个Tab页对应一个进程,GPU渲染共用一个独立进程,进程之间通过IPC通信。


  • WebKit: Rendering engine shared between Safari, Chromium, and all other WebKit-based browsers. The Port is a part of WebKit that integrates with platform dependent system services such as resource loading and graphics.

  • Glue: Converts WebKit types to Chromium types. This is our “WebKit embedding layer.” It is the basis of two browsers, Chromium, and test_shell (which allows us to test WebKit).

  • Renderer / Render host: This is Chromium’s “multi-process embedding layer.” It proxies notifications and commands across the process boundary.

  • WebContents: A reusable component that is the main class of the Content module. It’s easily embeddable to allow multiprocess rendering of HTML into a view. See the content module pages for more information.

  • Browser: Represents the browser window, it contains multiple WebContentses.

  • Tab Helpers: Individual objects that can be attached to a WebContents (via the WebContentsUserData mixin). The Browser attaches an assortment of them to the WebContentses that it holds (one for favicons, one for infobars, etc).




content module pages