[Webkit-unassigned] [Bug 111177] feGaussianBlur shows banding under certain circumstances

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=111177





--- Comment #3 from lars.sonchocky-helldorf at hamburg.de  2013-03-01 14:13:28 PST ---
(In reply to comment #2)
> Can you be a bit more precise about what you would expect? I can confirm that the filtered result looks the same in Chromium. Firefox fails and seems to run into circles, Opera displays it the same as WebKit.
> 
> Looking at the source, it does exactly what I would expect it to look like. You filter a text "text". Note that the "t" is larger than the "ex". This leads to the three bands that you mentioned.

If you look closely you see an alternation of darker and brighter bandings in the resulting gradient. I expect a smooth gradient without such alternations. I assume some byte swapping or overflow issues occurring here. Take a look at the screenshot using "Pixie.app" from the Mac OS X developer tools ( http://macapper.com/2007/04/16/the-gems-of-apples-development-tools/ ) or something similar.

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