Understanding WebView Rendering Pipeline

[Rahul Patel]

Hello,

I have been trying to understand  WebView rendering pipeline, and how its implemented and its design choice. 

Chromium Primarily provides onScreen ( rendering directly into visible surface) and off-screen (rendering into an intermediate buffer) based rendering, and looking at the latest version of WebView/Chromium it looks like WebView currently doing off-screen based rendering using FBO,  do we have any doc for this design choice? specially benefits of using FBO over surface-less. 

Any inputs will be help!

Thanks,

 RP

[Nate Fischer]

I'm not sure about the exact design choice here, but maybe Bo or Vasiliy will know.

Nate Fischer | Software Engineer | ntf...@google.com

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[Bo Liu]

Webview doesn't own the surface it renders to, and it's libhwui that directs where webview renders to. *Most of the time* it should be the visible surface and that FBO function should return 0.