progs/perf: add first attempt at a swapbuffers rate test

This is pretty ugly as the original framework assumed you'd set
a single window size at startup and keep it throughout, but for
swapbuffers you want to test the rate at various window sizes.

With luck a nicer solution can be found, but this at least lays out
a marker.

1 files changed, 5 insertions, 0 deletions

diff --git a/progs/perf/vertexrate.c b/progs/perf/vertexrate.c
index 21231d8208..b5355525d0 100644
--- a/progs/perf/vertexrate.c
+++ b/progs/perf/vertexrate.c
@@ -228,6 +228,11 @@ DrawRangeElementsBO(unsigned count)
    PerfSwapBuffers();
 }
 
+void
+PerfNextRound(void)
+{
+}
+
 
 /** Called from test harness/main */
 void