Apologies, this was meant to have the estimated release as Firefox 50 (current Nightly).
- Matt On Friday, 1 July 2016 13:42:46 UTC+2, Matt Woodrow wrote: > Summary: > > The editors draft of the 3d transforms spec [1] has been updated to say > that we need to flatten preserve-3d when the element also has an opacity > of < 1, whereas the previous spec [2] made no mention of opacity. > > The current behaviour (in Gecko, WebKit and blink) is to drop the > 'group' nature of opacity, and propagate the opacity effect down on to > the leaves of the preserve-3d tree. This is non-intuitive, not specified > at all, and has slightly differently rendering in all browsers (based on > the specifics of what compositable layers get created I believe - see > layout/reftests/opacity-preserve3d-N.html reftests). > > The blink team intend to change their behaviour to match the new spec, > even though it might break webcompat in some cases. The initial > www-style discussion [3] and their intent to implement thread [4] covers > their motivations for wanting to do this. > > Given that the existing behaviour appears to be used incredibly rarely > [5] and that it moves us to well specified behaviour that is easy to > conform to, then I think we should do the same. > > > Bug: > > https://bugzilla.mozilla.org/show_bug.cgi?id=1283827 > > > Link to standard: > > Editors draft: > https://drafts.csswg.org/css-transforms/#grouping-property-values > <https://www.google.com/url?q=https%3A%2F%2Fdrafts.csswg.org%2Fcss-transforms%2F%23grouping-property-values&sa=D&sntz=1&usg=AFQjCNHxIkBTJ_RWvpzJWjX1oBse67N5gg><https://www.google.com/url?q=https%3A%2F%2Fdrafts.csswg.org%2Fcss-transforms%2F%23grouping-property-values&sa=D&sntz=1&usg=AFQjCNHxIkBTJ_RWvpzJWjX1oBse67N5gg> > > Current spec: https://www.w3.org/TR/css-transforms-1/ > <https://www.google.com/url?q=https%3A%2F%2Fwww.w3.org%2FTR%2Fcss-transforms-1%2F&sa=D&sntz=1&usg=AFQjCNEE6sBt_WfYWjONqzUtHS9rS_kaRg> > > > > <https://www.google.com/url?q=https%3A%2F%2Fdrafts.csswg.org%2Fcss-transforms%2F%23grouping-property-values&sa=D&sntz=1&usg=AFQjCNHxIkBTJ_RWvpzJWjX1oBse67N5gg> > > <https://www.google.com/url?q=https%3A%2F%2Fdrafts.csswg.org%2Fcss-transforms%2F%23grouping-property-values&sa=D&sntz=1&usg=AFQjCNHxIkBTJ_RWvpzJWjX1oBse67N5gg> > > Platform coverage: > > All platforms > > Estimated or target release: > > Firefox 52. > > Preference behind which this will be implemented: > > None. > > - Matt > > [1] https://drafts.csswg.org/css-transforms/#grouping-property-values > [2] https://www.w3.org/TR/css-transforms-1/#transform-style-property [3] > https://lists.w3.org/Archives/Public/www-style/2016May/0239.html [4] > https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/eBIp90_il1o > <https://groups.google.com/a/chromium.org/forum/#%21topic/blink-dev/eBIp90_il1o> > > [5] > https://www.chromestatus.com/metrics/feature/popularity#OpacityWithPreserve3DQuirk > > <https://www.google.com/url?q=https%3A%2F%2Fdrafts.csswg.org%2Fcss-transforms%2F%23grouping-property-values&sa=D&sntz=1&usg=AFQjCNHxIkBTJ_RWvpzJWjX1oBse67N5gg> _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
