D26171: Implement wp_viewporter

[Roman Gilg]

romangg created this revision.
romangg added a reviewer: KWin.
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REVISION SUMMARY
  This patch adds interfaces for specifying viewports via the wp_viewporter
  protocol extension. This allows to make surface size and buffer independent
  from each other. For example a video player can send 1080p video data while
  the window of the player is of different size.
  
  The server interface ViewportInterface is directly integrated with
  SurfaceInterface. Viewport changes are double-buffered by that.

TEST PLAN
  Added auto tests and with weston-scaler.

REPOSITORY
  R127 KWayland

BRANCH
  viewporter

REVISION DETAIL
  https://phabricator.kde.org/D26171

AFFECTED FILES
  autotests/client/CMakeLists.txt
  autotests/client/test_viewporter.cpp
  src/client/CMakeLists.txt
  src/client/registry.cpp
  src/client/registry.h
  src/client/viewporter.cpp
  src/client/viewporter.h
  src/server/CMakeLists.txt
  src/server/display.cpp
  src/server/display.h
  src/server/surface_interface.cpp
  src/server/surface_interface.h
  src/server/surface_interface_p.h
  src/server/viewporter_interface.cpp
  src/server/viewporter_interface.h

To: romangg, #kwin
Cc: kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns
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