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Improve frame limiter logic

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git-svn-id: https://svn.eduke32.com/eduke32@7935 1a8010ca-5511-0410-912e-c29ae57300e0
This commit is contained in:
terminx 2019-08-09 09:28:34 +00:00 committed by Christoph Oelckers
parent 0a5cdea62a
commit 564a68f1a7
1 changed files with 13 additions and 10 deletions
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21
source/duke3d/src/game.cpp
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@ -6323,24 +6323,27 @@ void G_MaybeAllocPlayer(int32_t pnum)
int G_FPSLimit(void)
{
if (!r_maxfps)
return 1;
static double nextPageDelay = g_frameDelay;
static uint64_t lastFrameTicks = timerGetTicksU64() - (uint64_t) g_frameDelay;
int frameWaiting = 0;
uint64_t const delay = llrint(nextPageDelay);
uint64_t const frameTicks = timerGetTicksU64();
uint64_t const frameDelay = (uint64_t)llrint(g_frameDelay);
static uint64_t lastFrameTicks = frameTicks - frameDelay;
uint64_t elapsedTime = frameTicks-lastFrameTicks;
if (!r_maxfps || elapsedTime >= (uint64_t) nextPageDelay)
{
if (elapsedTime >= (uint64_t) (nextPageDelay + g_frameDelay))
int frameWaiting = 0;
if (elapsedTime >= delay)
{
//If we missed a frame, reset any cumulated remainder from rendering frames early
if (elapsedTime > frameDelay)
nextPageDelay = g_frameDelay;
}
else
{
nextPageDelay += g_frameDelay - elapsedTime;
}
nextPageDelay += double(frameDelay-elapsedTime);
lastFrameTicks = frameTicks;
++frameWaiting;