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Filter Clipping Region

From: Brad Kemper <brad.kemper@gmail.com>
Date: Tue, 11 Jan 2011 09:07:42 -0800
Cc: "Dirk Schulze" <vbs85@gmx.de>, public-fx@w3.org
Message-Id: <4C0FF4E4-5956-4D13-88CF-4BFB0567D58E@gmail.com>
To: "Erik Dahlstrom" <ed@opera.com>

On Jan 11, 2011, at 7:55 AM, Erik Dahlstrom wrote:

>> On the other hand, this implementation still cause the long known confusions for web developer. In many cases the shadow will be clipped because of the hard clipping region of (-10%, -10%, 120%, 120%) of the boundingBox of the target.
> That's a separate issue, it affects all filter primitives (even if blur is the most common example). I think the svg filters should probably default to not clipping instead, e.g by introducing some sort of auto region calculation.

Yes, please. I find the "Filter Region Extensions" [1] to be wholly confusing. It seems to me that clipping the input could be useful, but what effect requires clipping the output region to anything less than what the filter produces? Are there effects that will spread to the whole canvas or viewport otherwise?

[1] http://www.w3.org/TR/2007/WD-SVGFilter12-20070501/#FilterEffectsRegion
Received on Tuesday, 11 January 2011 17:08:18 UTC

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