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[dxgi] Estimate vblank count for frame statistics

This commit is contained in:
Philip Rebohle 2022-09-15 14:58:31 +02:00
parent c56a9b5a3f
commit 57af9e8760
1 changed files with 19 additions and 2 deletions
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21
src/dxgi/dxgi_output.cpp
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@ -370,9 +370,26 @@ namespace dxvk {
static bool s_errorShown = false;
if (!std::exchange(s_errorShown, true))
Logger::warn("DxgiOutput::GetFrameStatistics: Stub");
Logger::warn("DxgiOutput::GetFrameStatistics: Frame statistics may be inaccurate");
// Estimate vblank count based on last known display mode. Querying
// the display mode on every call would be prohibitively expensive.
auto refreshPeriod = computeRefreshPeriod(
monitorInfo->LastMode.RefreshRate.Numerator,
monitorInfo->LastMode.RefreshRate.Denominator);
// We don't really have a way to query time since boot
auto t1Counter = dxvk::high_resolution_clock::get_counter();
auto t0 = dxvk::high_resolution_clock::get_time_from_counter(monitorInfo->FrameStats.SyncQPCTime.QuadPart);
auto t1 = dxvk::high_resolution_clock::get_time_from_counter(t1Counter);
pStats->PresentCount = monitorInfo->FrameStats.PresentCount;
pStats->PresentRefreshCount = monitorInfo->FrameStats.PresentRefreshCount;
pStats->SyncRefreshCount = monitorInfo->FrameStats.SyncRefreshCount + computeRefreshCount(t0, t1, refreshPeriod);
pStats->SyncQPCTime.QuadPart = t1Counter;
pStats->SyncGPUTime.QuadPart = 0;
*pStats = monitorInfo->FrameStats;
m_monitorInfo->ReleaseMonitorData();
return S_OK;
}