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Re: [presentation-api] Define that "TV" should appear as token for UA-string when presentation API is used to render on TV

From: Tomoyuki Shimizu via GitHub <sysbot+gh@w3.org>
Date: Tue, 21 Jun 2016 02:52:26 +0000
To: public-secondscreen@w3.org
Message-ID: <issue_comment.created-227327173-1466477546-sysbot+gh@w3.org>
One of differences between display and TV is that 
[overscan](https://en.wikipedia.org/wiki/Overscan) is typically 
applied to TVs. TVs in overscan mode hide a 5% margin of a picture and
 show the rest in full screen.

Generally, TV app developers should be careful that UI could work 
properly whether a TV would be in overscan mode or not. (It is 
unnecessary for displays, though.) For example, pictures could be 
displayed in the full range of 1920x1080, but active UIs should be 
placed on the action-safe area (the inner area surrounded by the 5% 
margin). IMHO, including "TV" in the UA string could help web apps to 
control UIs by JavaScript in this manner.

Note: Android TV has the similar guidelines. 

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Received on Tuesday, 21 June 2016 02:52:28 UTC

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