D20455: [qpa] Don't specify EGL_SURFACE_TYPE when choosing EGLConfig

ekurzinger created this revision.
ekurzinger added a reviewer: KWin.
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REVISION SUMMARY
  Since QPA only performs off-screen rendering, it does not require an EGLConfig that supports any particular surface type.
  Currently it requests a config supporting window surfaces, however the EGLDeviceEXT platform, which is the basis of the
  EGLStream back-end used with the proprietary NVIDIA driver, does not support such surfaces resulting in eglChooseConfig
  not returning any valid configs when that back-end is in use. Since QPA doesn't actually create any window surfaces, it should 
  be fine to remove this restriction to allow it to initialize properly with the EGLStream back-end.

TEST PLAN
  Start a Wayland Plasma session on NVIDIA hardware with the proprietary driver (see https://phabricator.kde.org/D18570)
  Configure the window switcher to use the breeze theme and trigger it (with alt + tab by default)
  KWin should not crash and the window switcher dialogue should be displayed correctly.

REPOSITORY
  R108 KWin

REVISION DETAIL
  https://phabricator.kde.org/D20455

AFFECTED FILES
  plugins/qpa/abstractplatformcontext.cpp

To: ekurzinger, #kwin
Cc: kwin, #kwin, jraleigh, GB_2, mkulinski, ragreen, jackyalcine, Pitel, iodelay, bwowk, ZrenBot, ngraham, alexeymin, lesliezhai, ali-mohamed, hardening, jensreuterberg, abetts, sebas, apol, mart