[Webkit-unassigned] [Bug 103513] Provide the backend for exposing the layer tree to the Web Inspector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=103513





--- Comment #45 from Antoine Quint <graouts at apple.com>  2012-12-03 13:40:41 PST ---
(In reply to comment #43)
> > If we go back to the bug's description, the real intent of this agent is provide information about layers composited in hardware. What we're trying to address in the Safari Web Inspector are issues related to the increased memory footprint caused by layers and the ability to easily see what gets composited in a hardware-backed RenderLayer. As such, we only want to show this feature when ACCELERATED_COMPOSITING is on. We can revisit this later as needed, but I think in the context of this bug we should keep the flags as they are.
> 
> I realize this works as intended in your particular usage scenario. This may, however, appear confusing for the rest of the protocol clients. I think a more consistent approach would be either to expose render layers unconditionally on whether compositing is used, or just expose composited layers only.

Further work may indeed be done to enable all clients to expose the RenderLayer tree even when ACCELERATED_COMPOSITING. I do think this patch however has evolved in a way that it's useful as-is, technically sound and with a protocol that allows extension. I don't plan on making substantial changes to WebCore as part of this bug.

I will however update the test per your suggestions.

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