D29526: Thumbnails: make thumbnail generation dpr-aware

[Méven Car]

meven created this revision.
meven added reviewers: Frameworks, dfaure, broulik, sitter, ngraham.
Herald added projects: Dolphin, Frameworks.
Herald added subscribers: kfm-devel, kde-frameworks-devel.
meven requested review of this revision.

REVISION SUMMARY
  Thumbnail ioslave can now receive a devicePixelRatio metadata parameter, that it will pass to its thumbnail creators plugins implementing ThumbCreatorV3.
  It updates the directory thumbnail generation.
  
  Port image, jpeg, djvu, krita, svg, text to new ThumbCreatorV3.
  
  Depends on D29397 <https://phabricator.kde.org/D29397>

TEST PLAN
  Manualy tested
  With dolphin D29525 <https://phabricator.kde.org/D29525>

REPOSITORY
  R320 KIO Extras

BRANCH
  thumbnail-dpr

REVISION DETAIL
  https://phabricator.kde.org/D29526

AFFECTED FILES
  CMakeLists.txt
  thumbnail/djvucreator.cpp
  thumbnail/djvucreator.h
  thumbnail/imagecreator.cpp
  thumbnail/imagecreator.h
  thumbnail/jpegcreator.cpp
  thumbnail/jpegcreator.h
  thumbnail/kritacreator.cpp
  thumbnail/kritacreator.h
  thumbnail/svgcreator.cpp
  thumbnail/svgcreator.h
  thumbnail/textcreator.cpp
  thumbnail/textcreator.h
  thumbnail/thumbnail.cpp
  thumbnail/thumbnail.h

To: meven, #frameworks, dfaure, broulik, sitter, ngraham
Cc: kde-frameworks-devel, kfm-devel, waitquietly, azyx, nikolaik, pberestov, iasensio, aprcela, fprice, LeGast00n, cblack, fbampaloukas, alexde, Codezela, feverfew, meven, michaelh, spoorun, navarromorales, firef, ngraham, andrebarros, bruns, emmanuelp, rdieter, mikesomov
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