D19550: [Media Frame] Use mipmapping for higher quality

[Nathaniel Graham]

ngraham created this revision.
ngraham added a reviewer: Plasma.
Herald added a project: Plasma.
Herald added a subscriber: plasma-devel.
ngraham requested review of this revision.

REVISION SUMMARY
  Without mipmapping, diagonal lines are aliased and many images look terrible.

TEST PLAN
  Before: F6660129: Before.png <https://phabricator.kde.org/F6660129>
  
  After: F6660131: After.png <https://phabricator.kde.org/F6660131>
  
  Slideshow transitions still work.
  
  Performance still seems good in a crappy VM with 2 GB RAM and software rendering only.

REPOSITORY
  R114 Plasma Addons

BRANCH
  use-mipmapping-for-higher-quality (branched from Plasma/5.15)

REVISION DETAIL
  https://phabricator.kde.org/D19550

AFFECTED FILES
  applets/mediaframe/package/contents/ui/main.qml

To: ngraham, #plasma
Cc: plasma-devel, jraleigh, GB_2, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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