[Webkit-unassigned] [Bug 100718] Invalidate non-composited content host when page scale factor changes

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=100718





--- Comment #13 from James Robinson <jamesr at chromium.org>  2012-11-19 14:15:42 PST ---
(In reply to comment #12)
> (In reply to comment #11)
> > (In reply to comment #8)
> > > 3. Supposedly if the compositor wants to change the contents scale to repaint a high-res version, it is the compositor's responsibility to invalidate the layer. The compositor actually does it, but on the RenderView layer, which is a no-op since RenderView layer is non-drawing layer because its content is stolen by the non-composited content layer.
> > 
> > WebCore is responsible for this property, not the compositor.
> 
> NonCompositedContentHost is owned by WebViewImpl in WebKit. So it seems reasonable to do the way the patch does. 
> 
> When WebCore needs to invalidate a region, it invalids a rect. This propagates to NonCompositedContentHost through WebViewImpl::invalidateRect. But when scale factor changed, we want to invalidate everything, not just the visible part.

Sure, that's fine.  That's what repaint() does.

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