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@@ -667,6 +667,15 @@ Available video output drivers are:
X11/GLX only.
+ ``vsync-fences=<N>``
+ Synchronize the CPU to the Nth past frame using the ``GL_ARB_sync``
+ extension. A value of 0 disables this behavior (default). A value of
+ 1 means it will synchronize to the current frame after rendering it.
+ Like ``glfinish`` and ``waitvsync``, this can lower or ruin performance.
+ Its advantage is that it can span multiple frames, and effectively limit
+ the number of frames the GPU queues ahead (which also has an influence
+ on vsync).
+
``dwmflush=<no|windowed|yes>``
Calls ``DwmFlush`` after swapping buffers on Windows (default: no).
It also sets ``SwapInterval(0)`` to ignore the OpenGL timing. Values