- From: Chris Lilley <chris@w3.org>
- Date: Wed, 27 Jul 2011 19:16:53 +0200
- To: "Tab Atkins Jr." <jackalmage@gmail.com>
- CC: Leif Arne Storset <lstorset@opera.com>, "www-style@w3.org" <www-style@w3.org>
On Wednesday, July 27, 2011, 6:03:52 PM, Tab wrote: TAJ> On Wed, Jul 27, 2011 at 5:37 AM, Leif Arne Storset <lstorset@opera.com> wrote: >> I agree with Alan that the effects demonstrated at [0] are desirable, but >> premultiplied is a much better default. The switching idea is worth >> considering, however. I think use of the rgba() and hsla() are potentially >> confusing as switches, but an explicit 'unpremultiplied' switch wouldn't >> be: 'linear-gradient(left, unpremultiplied, rgba(255,255,0,0), yellow)'. TAJ> I believe a better approach would be to augment SVG's TAJ> color-interpolation property with options for switching between TAJ> premultiplied and non-premultiplied. That way other things could TAJ> potentially switch as well, like transitions. I agree that is a better approach. Currently the color-interpolation property selects between colour spaces. It would be possible to add a premultipliedRGB value. Note that conversion into a premultiplied colourspace does result in loss of colour precision as the opicity decreases. -- Chris Lilley Technical Director, Interaction Domain W3C Graphics Activity Lead, Fonts Activity Lead Co-Chair, W3C Hypertext CG Member, CSS, WebFonts, SVG Working Groups
Received on Wednesday, 27 July 2011 17:17:05 UTC