Primary eng emails

caban...@adobe.com, ol...@adobe.com, scrac...@adobe.com

Spec
http://www.w3.org/TR/compositing-1/#background-blend-mode


*Summary*

This new CSS property allows you to specify blending between background images
and the background color.

The specification just transitioned to CR (see
http://lists.w3.org/Archives/Public/public-fx/2014JanMar/0048.html) and is
scheduled to be published on Feb 8, 2014


It landed behind a runtime flag in mozilla:
https://bugzilla.mozilla.org/show_bug.cgi?id=841601

The flag is: layout.css.background-blend-mode.enabled

Nightly has is turned on by default.


We are in the process of porting over more tests but feel like that it is
ready to ship now and would like to flip the runtime flag to always be on.

*WebKit:*

The feature is current implemented with a prefix in WebKit:
https://bugs.webkit.org/show_bug.cgi?id=108546

The prefix will be dropped shortly (
https://bugs.webkit.org/show_bug.cgi?id=128270)

The property is not guarded by a runtime flag so it is part of all webkit
builds. (= a webkit client would have to go out of its way to remove it)


*Blink:*

This feature was landed behind the 'experimental features' flag in Chrome.

http://crbug.com/229166

http://www.chromestatus.com/features/5768037999312896

We are going to request an intent to ship there as well


*developers:*

We've not done a lot of evangelizing but lately we've seen some articles
that are covering this topic.

For instance: https://medium.com/p/6b51bf53743a with a set of nice example
files: http://codepen.io/collection/Kgshi/ (see
http://codepen.io/bennettfeely/pen/rxoAc for the typical use case of
background blending)
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