Background for login, splash, and lockscreen

[Martin Graesslin]

On Saturday 21 June 2014 16:18:10 Kai Uwe Broulik wrote:
> Can't we just use QtGraphicalEffects and just blur (and/or desaturate and/or
> darken) whatever picture the user has chosen?
> 
> The overall performance of these is great (at least on Android which is slow
> in any other QtQuick respect) but their instantiation takes ages, so might
> not be suitable for lockscreen which needs to start quickly or splash which
> shouldn't unnecessarily delay startup.
> 
> So, umm, while writing this I figured it's not that good of an idea as I
> initially thought :-)

so you suggest that on millions of devices we blur the window fullscreen every 
time the user logs in (lots of more important stuff to do) and locks the 
screen? Compared to preparing it once and just installing it? That sounds like 
a very bad memory-time tradeoff [1].

Cheers
Martin

[1] https://en.wikipedia.org/wiki/Time-memory_tradeoff
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