837350 - Keep showing "live preview" of app in task switcher until screenshot is ready

Status: RESOLVED DUPLICATE of bug 818765

(Firefox OS Graveyard :: Gaia::System, defect)

Description

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

STR
 (1) Open an app that can take a while to repaint, like grooveshark
 (2) Long-press HOME to open task switcher

Notice that
 A. Grooveshark UI stays "live" during zoom-out animation
 B. The UI goes completely transparent in the task switcher for a while
 C. Then when a screenshot comes in, it's loaded

The app being transitioned is able to paint in real time easily ... let's just use that instead of janking to transparency.

b? -> radar

Comment 1

[Lukas Blakk [:lsblakk] use ?needinfo]

Will track and let UX weigh in on what version(s) they want this nominated for uplift to but it's not a release blocker.

Comment 2

[Chris Jones [:cjones] inactive; ni?/f?/r? if you need me]

After fixing (well, hacking around) bug 842091, I see that this would be relatively easy to do if we break the (what ended up being pretty silly) abstraction boundary between cards view and the window manager.  We just need to put the visible app's iframe in the <li> in the cards view, and not finish up the last step in windowClosed() that sets the iframe to inactive and hidden.

Comment 3

[Josh Carpenter [:jcarpenter]]

Would very much like to have this. The current implementation feels extremely glitchy due to the screenshots popping in and out of transparency unnecessarily. 

Adding ux-most-wanted.

Comment 4

[Josh Carpenter [:jcarpenter]]

Michal, would this be something you could take a look at?

Comment 5

[Kevin Grandon :kgrandon]

Now that 7deecf8a04fdad0ba7480705a074ef6c38f46255 has landed I believe this is a non issue. As we're currently caching screenshots, the cars appearance should be instant. 

Going to mark as a duplicate of 818765.