From f9b6dcc9866bf42d48b2d2281431a706e99948cc Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Thu, 20 Aug 2020 15:18:45 +1000
Subject: [PATCH] [client] only resync the timer if we got an early frame

This prevents a slow update (ie, 30ups) from pulling the refresh rate
below the minimum (ie, 60fps).
---
 VERSION           |  2 +-
 client/src/main.c | 10 +++++++---
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/VERSION b/VERSION
index 78d01c79..020680e6 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-B2-rc4-6-g7e362050f7+1
\ No newline at end of file
+B2-rc4-7-g5c912e3c27+1
\ No newline at end of file
diff --git a/client/src/main.c b/client/src/main.c
index 0f7ba80e..0436b73d 100644
--- a/client/src/main.c
+++ b/client/src/main.c
@@ -213,12 +213,16 @@ static int renderThread(void * unused)
         if (atomic_fetch_sub_explicit(&a_framesPending, 1, memory_order_release) > 1)
           continue;
 
-      if (lgWaitEventAbs(e_frame, &time))
+      if (lgWaitEventAbs(e_frame, &time) && state.frameTime > 0)
       {
-        if (state.frameTime > 0)
+        /* only resync the timer if we got an early frame */
+        struct timespec now, diff;
+        clock_gettime(CLOCK_REALTIME, &now);
+        tsDiff(&diff, &now, &time);
+        if (diff.tv_sec == 0 && diff.tv_nsec < state.frameTime)
         {
           resyncCheck = 0;
-          clock_gettime(CLOCK_REALTIME, &time);
+          memcpy(&time, &now, sizeof(struct timespec));
           tsAdd(&time, state.frameTime);
         }
       }