• Tor Lillqvist's avatar
    In case BitBlt() fails with ERROR_INVALID_HANDLE, the most probable cause · ef2c2326
    Tor Lillqvist authored
    2005-10-01  Tor Lillqvist  <tml@novell.com>
    
    	* gdk/win32/gdkdrawable-win32.c (blit_from_pixmap): In case
    	BitBlt() fails with ERROR_INVALID_HANDLE, the most probable cause
    	is that the the desktop isn't visible because the session has been
    	switched, the screen is locked, or a terminal server session
    	disconnected, so no error message necessary. (#137796)
    
    	It is of course remotely possible that BitBlt() failing with
    	ERROR_INVALID_HANDLE might also be caused by some other
    	problem. We could strive for perfection and track whether the
    	desktop is visible by using WTSRegisterSessionNotification() and
    	handling WM_WTSESSION_CHANGE. I think that's overdoing it just for
    	this issue, though. If we would track desktop visibility, we
    	should then avoid even trying to update the display at all while
    	the desktop isn't visible.
    ef2c2326
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