D24206: KWin::GLTexture support external textures

davidedmundson created this revision.
davidedmundson added a reviewer: KWin.
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REVISION SUMMARY
  Currently KWin::GLTexture is a nice wrapper for creating a GL texture
  and performing various operations including rendering.
  
  In a pending patch I want to render the FBO from a QQuickScene directly,
  where we have an underlying texture already, but it makes sense to
  re-use this class for the rendering. A similar need is in haagch's kwin
  VR patchset.
  
  This patch adds a constructor to GLTexture that takes an externally
  managed texture and provides the relevant useful KWin features.

TEST PLAN
  Used in patch series

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D24206

AFFECTED FILES
  libkwineffects/kwingltexture.cpp
  libkwineffects/kwingltexture.h
  libkwineffects/kwingltexture_p.h

To: davidedmundson, #kwin
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