[Webkit-unassigned] [Bug 27561] ImageDecoder enhancements for WINCE port

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Fri Aug 14 11:13:58 PDT 2009


--- Comment #33 from Peter Kasting <pkasting at google.com>  2009-08-14 11:13:57 PDT ---
(In reply to comment #32)
> (In reply to comment #30)
> > I wonder
> > if it actually saves much time (it's only relevant while an image is
> > half-decoded and being painted, and at that point the user isn't getting
> > high-speed animation or similar anyway).  If it doesn't actually buy meaningful
> > performance, then returning true for frameHasAlphaAtIndex() (either using the
> > method it has now, which I think is fine, or pushing this into all the
> > decoders, which I think is unnecessary code duplication for no benefit) seems
> > like a simpler and better way.
>    The performance issue is very valid for our target platform.

OK, do you have some data (e.g. page load times or animation frame rates)
around this issue?  It would be helpful in deciding whether we should also try
to convert the other backends over to a similar mechanism.  I could be totally
overlooking a particular case where this is really useful.

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