Community Workspace/Tegra3/Nexus7/EGL NOK issues

According to IRC, "eglext-tests" package provides tests. At least the following extensions are missing according to the tests and claimed to be used somewhere in Mer or Nemo:
 * EGL_NOK_image_shared
 * EGL_NOK_swap_region2
 * EGL_KHR_lock_surface2

Qt5 doesn't seem to contain any EGL_NOK usage but Qt 4.8 does:

xxxx@yyyy:/tmp/qt-everywhere-opensource-src-4.8.4$ grep -nrI EGL_NOK_. ./src/opengl/qgl_egl.cpp:258:                   if (!QEgl::hasExtension("EGL_NOK_image_shared")) { ./src/opengl/qwindowsurface_gl.cpp:449:       haveNOKSwapRegion = QEgl::hasExtension("EGL_NOK_swap_region2"); ./src/opengl/qwindowsurface_gl.cpp:453:           qDebug << "Found EGL_NOK_swap_region2 extension. Using partial updates."; ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:89:       qFatal("EGL_NOK_image_shared not found but trying to use capability!"); ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:97:       qFatal("EGL_NOK_image_shared not found but trying to use capability!"); ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:105:       qFatal("EGL_NOK_image_shared not found but trying to use capability!"); ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:113:       qFatal("EGL_NOK_surface_scaling not found but trying to use capability!"); ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:173:   if (QEgl::hasExtension("EGL_NOK_image_shared")) { ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:174:       qDebug("MeegoGraphics: found EGL_NOK_image_shared"); ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:185:   if (QEgl::hasExtension("EGL_NOK_surface_scaling")) { ./src/plugins/graphicssystems/meego/qmeegoextensions.cpp:186:       qDebug("MeegoGraphics: found EGL_NOK_surface_scaling"); ./src/gui/egl/qegl.cpp:617:       if (QEgl::hasExtension("EGL_NOK_swap_region2")) { ./src/gui/egl/qegl.cpp:660:   qWarning("QEgl::eglSwapBuffersRegion2NOK called but EGL_NOK_swap_region2 extension not present");

NOTE: Qt 4.8 MeeGo runtime provides NOK enhanced functions to applications and their usage is up to the application.

See EGL_extensions for a list of extensions and how they are supported on different hardware.