D16802: effects: attempt to screenshot on OpenGL ES 2.0 instead of failing

bshah added a comment.


  Ah, now that I read code of `GLRenderTarget::blitFromFramebuffer` this makes sense,
  
  This code path is executed only when `blitSupported` is true. Which makes it crash. But on adreno devices somehow I get working screenshot even without framebufferBlit by just doing glReadPixels.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D16802

To: bshah, #kwin, davidedmundson, graesslin
Cc: graesslin, kwin, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart