[webkit-help] Relation between RenderLayer and the rendering tree?
mjs at apple.com
Mon Aug 17 23:48:17 PDT 2009
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.
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