[Webkit-unassigned] [Bug 33408] Add flag IGNORE_FIXED_BACKGROUNDS (disabled by default) to ignore fixed background images and accelerate web page scrolling on low-powered/mobile devices

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=33408





--- Comment #5 from Adam Treat <treat at kde.org>  2010-01-13 11:47:27 PST ---
(In reply to comment #4)
> (From update of attachment 46176 [details])
> This seems like the wrong approach. Why not just change CSSStyleSelector to
> override FixedBackgroundAttachment with ScrollBackgroundAttachment?

Because if the page has fixed position elements then the scroll will be slow
anyways so we might as well honor the fixed background?

> Also, having a whole new build setting, IGNORE_FIXED_BACKGROUNDS, for this
> seems like overkill. What if you find some other CSS property that you'd like
> to ignore to get fast scrolling? It seems like it should be
> ALLOW_FAST_SCROLLING or something that indicates that this is for a
> limited-capacity mobile device.

Hmm, then it isn't as descriptive to what it actually does.  We could certainly
do this, but I guess it should have 'MOBILE' in the name or so... 
MOBILE_FAST_SCROLLING ?

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