On Tue, May 21, 2013 at 11:16 PM, Robert O'Callahan <robert@ocallahan.org>wrote: > On Wed, May 22, 2013 at 11:40 AM, Rik Cabanier <cabanier@gmail.com> wrote: > >> - the backdrop is the stacking context of your ancestor -> this still >> needs more discussion and is marked as an issue since it could be the >> ancestor layer. > > > I don't see how that helps much. An element's ancestor's stacking context > could contain all kinds of content below the element, which the browser > could have assigned to layers in various ways. > Those would have been composited already by the time the element that is blending, is composited. I don't think that is ever done out of order. So, all those layers are already in the stacking context/layer so it's possible to examine the pixels. Someone mentioned that maybe you should only blend with your parent element (in effect promote it to a stacking context too), but I think that doesn't solve the problem either... > > CSS constructs that create groups or layers, is something that developers >> are getting more familiar with. >> I realize that browser vendors are hesitant to specify them but it looks >> that Google is starting to educate its users about them. >> For instance, layers (and their effect on performance) are discussed at >> Google IO here: >> >> https://developers.google.com/events/io/sessions/325933151 >> https://developers.google.com/events/io/sessions/325091862 >> >> > I don't think it's a good idea to teach authors to create content > optimized for one specific rendering implementation. > Yes, the Q & A was touching on that a bit.
Received on Wednesday, 22 May 2013 06:36:34 UTC