On Aug 28, 2013, at 6:11 AM, Paul LeBeau <paul.lebeau@gmail.com> wrote: > > On 27 August 2013 20:42, Dirk Schulze <dschulze@adobe.com> wrote: > Again, it is extremely hard to determine the right scale level for the horizontal and vertical axis... > > As someone who is implementing filter support in my renderer at the moment, I can concur with this :) > > It would be helpful if the spec gave some guidance on best practice for determining an appropriate size for the filter bitmap. By "filter bitmap" I mean the intermediate bitmap used for SourceGraphic etc. For axis aligned content it is easy, but if the element has a transform, it is not so straightforward. I actually planned to discuss that in a different threat. I agree with you on that and invite implementers to give feedback on how they estimate the affected area in screen coordinates. I will do so for WebKit shortly. > In fact I notice that IE doesn't even try. It performs all filters on the transformed content and doesn't use user-coordinate-space. I never really experimented with filters in IE so far. I wonder how that works with gaussian blur and a horizontal blur radius on a rotated object. Is the blurring following the rotation or does it stay in the horizontal position? Greetings, Dirk > > Paul >Received on Wednesday, 28 August 2013 04:39:08 UTC
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