From d7fa39c4eb2ea8ebe9ec220deff08e7afa959332 Mon Sep 17 00:00:00 2001
From: Philip Rebohle <philip.rebohle@tu-dortmund.de>
Date: Fri, 16 Jun 2023 15:55:31 +0200
Subject: [PATCH] [util] Be more robust against timing weirdness when computing
 vblank count

---
 src/util/util_misc.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/util/util_misc.h b/src/util/util_misc.h
index 105f0507..da56f644 100644
--- a/src/util/util_misc.h
+++ b/src/util/util_misc.h
@@ -36,6 +36,9 @@ namespace dxvk {
    */
   template<typename TimePoint, typename Duration>
   uint64_t computeRefreshCount(TimePoint t0, TimePoint t1, Duration refreshPeriod) {
+    if (t1 < t0)
+      return 0;
+
     auto duration = std::chrono::duration_cast<Duration>(t1 - t0);
     return duration.count() / refreshPeriod.count();
   }