D8664: [platforms/drm] Move cursor dumb buffers to Output

[Martin Flöser]

graesslin created this revision.
graesslin added reviewers: KWin, Plasma.
Restricted Application added a project: KWin.
Restricted Application added subscribers: kwin, plasma-devel.

REVISION SUMMARY
  So far all outputs shared the same dumb buffer for the cursor image.
  This doesn't work any more when screen rotation is enabled. For rotated
  screens the cursor image per output is different. On some it might be
  rotated, on some not.
  
  To solve this problem the dumb buffers are moved from the DrmBackend to
  the DrmOutput. The DrmOutput now creates the cursor images itself and
  can rotate them if needed. Thus we get nicely transformed cursors.

TEST PLAN
  Rotated screens, moved cursor around, image properly rotated

REPOSITORY
  R108 KWin

BRANCH
  drm-cursor-to-output

REVISION DETAIL
  https://phabricator.kde.org/D8664

AFFECTED FILES
  plugins/platforms/drm/drm_backend.cpp
  plugins/platforms/drm/drm_backend.h
  plugins/platforms/drm/drm_output.cpp
  plugins/platforms/drm/drm_output.h

To: graesslin, #kwin, #plasma
Cc: plasma-devel, kwin, bwowk, ZrenBot, progwolff, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart
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