- From: Erik Dahlström <ed@opera.com>
- Date: Mon, 12 May 2008 14:31:54 +0200
- To: robert@ocallahan.org, www-svg <www-svg@w3.org>
On Sun, 11 May 2008 09:24:01 +0200, Robert O'Callahan <robert@ocallahan.org> wrote: > It's not clear to me from the spec what the 'point' parameter of the > 'turbulence' function means. > > Suppose I have > <filter primitiveUnits="userSpaceOnUse" x="0" y="0" width="20" > height="20"> > <feTurbulence x="10" y="10" width="10" height="10"/> > </filter> > > When we compute 'turbulence' for the top-left corner of the feTurbulence > filter primitive subregion, what is 'point'? I assume it's either (0,0) > or (0.5,0,5). I think that should depend on how an implemention does sampling in general. It's unlikely that an error would be easy to spot in most cases though. > Also, I think one can deduce that 'fTileX', 'fTileY', 'fTileWidth' and > 'fTileHeight' are the bounds of the filter primitive subregion, but it > would > be helpful if that was documented. Absolutely. And yes, that is how I interpret these parameters as well. Cheers /Erik -- Erik Dahlstrom, Core Technology Developer, Opera Software Co-Chair, W3C SVG Working Group Personal blog: http://my.opera.com/macdev_ed
Received on Monday, 12 May 2008 12:30:29 UTC