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Re: [csswg-drafts] [css-background-4] Switch to opt into transparent canvas for additive displays (#3949)

From: Rik Cabanier via GitHub <sysbot+gh@w3.org>
Date: Sat, 08 Aug 2020 15:03:08 +0000
To: public-css-archive@w3.org
Message-ID: <issue_comment.created-670939058-1596898987-sysbot+gh@w3.org>
> > dark mode doesn't make much sense on an additive device. Such a UA should only support light mode.
> 
> That's good. But what about a "fake" additive device. e.g. it's showing a camera feed on the display, and the web content floats above that. Most of the time you'd want a solid background, but I can imagine widgets and other smaller UIs would want to cut through.

To elaborate on my previous reply, a device that combines the background with the web content in hardware, *could* support dark mode and a transparent surface/canvas but it would depend on the brightness of the environment if light or dark mode would work well.
For instance, at night light mode is preferable but during bright conditions, dark mode would be better.



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