On 6 April 2013 20:25, Paul Berry <stereotype...@gmail.com> wrote: > When transform feedback is active, the driver manually counts the > number of primitives that run through the pipeline, so that if a batch > buffer flush happens, the next batch buffer can pick up transform > feedback where the last batch buffer left off. Hardware-accelerated > primitive restart interferes with this process (because it makes the > primitive count depend not just on the number of vertices entering the > pipeline, but also on the contents of the index buffer). So, when > transform feedback is active, we need to fall back to the software > implementation of primitive restart. > > Fixes piglit test "spec/!OpenGL 3.1/primitive-restart-xfb flush". > > NOTE: This is a candidate for stable release branches. >
NAK this patch. Eric Anholt came up with a much better solution that doesn't require a software fallback (commits 007a88e and 62a18da).
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