Re: [filter-effects] negative std deviation on feGaussianBlur

On Aug 26, 2013, at 6:37 PM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:

> On Mon, Aug 26, 2013 at 9:34 AM, Tab Atkins Jr. <jackalmage@gmail.com> wrote:
>> On Mon, Aug 26, 2013 at 5:31 AM, Dirk Schulze <dschulze@adobe.com> wrote:
>>> Hi,
>>> 
>>> The specification currently does not say what happens on negative standard deviation values for feGaussianBlur [1]. I suggest that it is not treated differently than a value of zero: the filter primitive does not have any effect on the input image, the input does not get blurred. I'll change the specification text to this suggestion.
>>> 
>>> Greetings,
>>> Dirk
>>> 
>>> [1] http://www.w3.org/TR/filter-effects/#feGaussianBlurElement
>> 
>> I agree with this change.
> 
> Note that I would disagree with this for blur() - a negative value
> should be invalid at parse time.  We try not to do fixup in CSS, since
> we have good fallback mechanisms.

Yes, it needs to be rejected at parse time according to the spec.

Greetings,
Dirk



> 
> ~TJ

Received on Monday, 26 August 2013 16:49:15 UTC