My branch updating the default wallpaper [1] makes this a little better.
With that MP, the only blurry wallpapers are portrait-wallpapers-on-a
-landscape-screen (i.e. it fixes the most common case: landscape-
wallpapers).

The proper fix is a little tricky.  We can either (A) load a lot more of
the wallpaper than we might need -- which slows loading down a bit and
is wasteful of memory -- or (B) test-load the wallpaper first to see
it's aspect ratio and adjust how we scale it to avoid the double-scaling
we currently see on portrait wallpapers.  (B) is complicated by the fact
that it would involve changing the sourceSize of the CrossFadeImage
object holding the wallpaper, which currently makes the CrossFadeImage
go to black.  Which kind of defeats the purpose of CrossFadeImage.  So
we may need some toolkit work.

[1] https://code.launchpad.net/~mterry/unity8/default-
wallpaper/+merge/297636

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to unity8 in Ubuntu.
https://bugs.launchpad.net/bugs/1597290

Title:
  Wallpapers in Windowed Mode are not scaled correctly

Status in unity8 package in Ubuntu:
  New

Bug description:
  When you set a new wallpaper from the Settings App, if it's a
  landscape wallpaper it will be well scaled if the phone screen is
  horizontal, but when it's vertical it will look blurry. When the
  wallpaper is a portrait picture, it happens the opposite: it is well
  scaled if the screen is vertical but when you rotate it, the wallpaper
  is blurry. Thanks ;)

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