D27788: Implement EGL_KHR_partial_update and EGL_EXT_swap_buffers_with_damage

zzag added a comment.


  Uh, there is a problem with calling aboutToStartPainting() from paintGenericScreen(). Namely, effects such as Desktop Grid and Slide may call EffectsHandler::paintScreen() more than once to render each individual virtual desktop.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D27788

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