[webkit-help] Relation between RenderLayer and the rendering tree?

Robin Cao robin.qxcao at gmail.com
Tue Aug 18 00:17:57 PDT 2009

Thanks for your insight.
With that idea in mind, the code is much more understandable.


On Tue, Aug 18, 2009 at 2:48 PM, Maciej Stachowiak <mjs at apple.com> wrote:

> On Aug 17, 2009, at 11:25 PM, Robin Cao wrote:
> Hi all,
>> I'm interested in hacking on WebCore’s rendering system and i'm reading
>> the source.
>> What confused me is that what the role does RenderLayer play in the
>> rendering process.
>> What's the relation between RenderLayer and the rendering tree?
> RenderLayer is a tree that, essentially forms a spare subtree of the full
> render tree, which is used to optimize incremental relayout and repainting.
> Opacity and explicit positioning are some of the things that can cause a
> RenderLayer to be created.
> Regards,
> Maciej
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