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[filter-effects] Bug in feTurbulance random algorithm.

From: Tavmjong Bah <tavmjong@free.fr>
Date: Sun, 04 Jan 2015 11:44:58 +0100
Message-ID: <1420368298.2206.27.camel@free.fr>
To: "public-fx@w3.org" <public-fx@w3.org>


Both Inkscape and Mozilla have bug reports concerning an error in the
feTurbulance random algorithm.[1][2] This bug results in squares being
drawn for certain seed values. (Example[3]) There is a discussion of the
problem on svg-developers.[4]

The Inkscape bug report traces the problem to a divide by zero when both
values in the fGradient table are zero which occurs for some seed
values. A couple solutions are proposed in the comments.


[1] https://bugs.launchpad.net/inkscape/+bug/1406458
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=862225
[3] https://launchpadlibrarian.net/193702227/turbulence-seed514.png
Received on Sunday, 4 January 2015 10:45:24 UTC

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