• Erik Kurzinger's avatar
    xwayland/eglstream: flush stream after eglSwapBuffers · 69112ad7
    Erik Kurzinger authored
    
    
    When eglSwapBuffers inserts a new frame into a window's stream, there may be a
    delay before the state of the consumer end of the stream is updated to reflect
    this. If the subsequent wl_surface_attach, wl_surface_damage, wl_surface_commit
    calls are received by the compositor before then, it will (typically) re-use
    the previous frame acquired from the stream instead of the latest one.
    
    This can leave the window displaying out-of-date contents, which might never be
    updated thereafter.
    
    To fix this, after calling eglSwapBuffers, xwl_glamor_eglstream_post_damage
    should call eglStreamFlushNV. This call will block until it can be guaranteed
    that the state of the consumer end of the stream has been updated to reflect
    that a new frame is available.
    Signed-off-by: Erik Kurzinger's avatarErik Kurzinger <ekurzinger@nvidia.com>
    69112ad7
xwayland-glamor-eglstream.c 41.5 KB