[Webkit-unassigned] [Bug 26455] GIF clamping time differs from Firefox

bugzilla-daemon at webkit.org bugzilla-daemon at webkit.org
Sun Mar 14 12:52:29 PDT 2010


--- Comment #11 from Peter Kasting <pkasting at google.com>  2010-03-14 12:52:29 PST ---
(In reply to comment #10)
> Bug 36082 has some research into Web compatibility effects of changing to
> Firefox behavior. This data makes simply matching Firefox unfeasible

This is your opinion, not objective fact.  In my opinion it is obvious from the
research I have done (some of which is on these bugs) here that changing our
behavior will result in a net win.  The fact that that win is not perfect does
not make it unreasonable.

There is a good analogy here with the BMP decoder I wrote.  Transparency in
BMPs is not specced anywhere and different programs produce different output. 
There is no perfect way to display all BMPs as their creators intend; you
_must_ use heuristics to decide what to do, and no matter what you do some BMPs
will display incorrectly.  In that situation it would be silly to say that one
cannot prefer behavior X over behavior Y because behavior X causes some BMPs to
display incorrectly which behavior Y does not.  There are problems either way,
and thus the right behavior is a judgment call.

Here too, it is impossible to craft a behavior that makes all images display
perfectly.  Therefore, what we should do is a judgment call.  I agree with
bdash that it would be good judgment to change.

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