Chromium ui framework(shared)
- 1. Views, Aura and Ash: ChromeOS UI Framework Simon YoungKi Hong simonhong@chromium.org
- 2. About Me Software Programmer @LGE (2009.02 ~) Chromium Contributor (2012.01 ~) Chromium Committer (2013.11 ~)
- 3. Goal Overview of ChromeOS UI Component. We can say “How ChromeOS UI is constructed!”
- 4. Goal
- 6. ChromeOS Linux based operating system. Only chrome browser is running for user.
- 7. UI Framework In typical linux, GUI Application GUI Application GUI Application Window Manager gtk qt efl ... X or Wayland Kernel
- 8. What kind of ToolKit is used in ChromeOS?
- 9. Views They created UI toolkit called "Views" "Since we desired a differentiated aesthetic for Chromium, we have had to build a framework on Windows to accelerate our development of custom UI" - Chromium design docs
- 10. Views UI is constructed of a tree of view components Widget RootView View View View View View View View
- 11. Views Like other toolkits, it has many custom views ● ● ● ● ● ● ● ● ● Label Image view web view slider separator link button combobox etc...
- 12. Views
- 13. OK. we know how Widget is made... But, who give user events or draw its content?
- 14. There is no window manager. ChromeOS runs single x-client application. Browser Process Renderer Process Renderer Process libx X …... GPU Process
- 15. They created a new window system. Aura
- 16. Aura Chrome's next generation hardware accelerated UI framework
- 17. Aura Contains view components Responsible for event propagation draw widget’s contents window hierarchy management - ChromeOS is a tree of Aura Window
- 18. Aura Event Flow Widget component Aura Window X Kernel Mouse Click
- 19. Aura Drawing? RootWindowHost CC RootWindow Composite & Draw Aura Window Aura Window Aura Window Aura Window Aura Window GPU process Browser process GPU
- 20. OK. we know how Widget is handled... But, how create a widget?
- 21. Ash (Aura SHell) "A shell is software that provides an interface for users of an operating system to access the services of a kernel." - wikipedia
- 23. Ash Role of Shell * Window mgmt. * Program exec. * System mgmt.
- 24. Ash
- 26. Q&A