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Merge branch 'frameskip-fixups' into 'master'

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Measure frameskip timing before sleeping

See merge request KartKrew/Kart!1602
This commit is contained in:
Oni 2023-11-05 21:00:57 +00:00
commit a3b2dc11ec
1 changed files with 19 additions and 13 deletions
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32
src/d_main.cpp
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@ -976,20 +976,9 @@ void D_SRB2Loop(void)
// Fully completed frame made. // Fully completed frame made.
finishprecise = I_GetPreciseTime(); finishprecise = I_GetPreciseTime();
if (!singletics)
{
INT64 elapsed = (INT64)(finishprecise - enterprecise);
// in the case of "match refresh rate" + vsync, don't sleep at all // Use the time before sleep for frameskip calculations:
const boolean vsync_with_match_refresh = cv_vidwait.value && cv_fpscap.value == 0; // post-sleep time is literally being intentionally wasted
if (elapsed > 0 && (INT64)capbudget > elapsed && !vsync_with_match_refresh)
{
I_SleepDuration(capbudget - (finishprecise - enterprecise));
}
}
// Capture the time once more to get the real delta time.
finishprecise = I_GetPreciseTime();
deltasecs = (double)((INT64)(finishprecise - enterprecise)) / I_GetPrecisePrecision(); deltasecs = (double)((INT64)(finishprecise - enterprecise)) / I_GetPrecisePrecision();
deltatics = deltasecs * NEWTICRATE; deltatics = deltasecs * NEWTICRATE;
@ -1009,6 +998,23 @@ void D_SRB2Loop(void)
{ {
frameskip = 0; frameskip = 0;
} }
if (!singletics)
{
INT64 elapsed = (INT64)(finishprecise - enterprecise);
// in the case of "match refresh rate" + vsync, don't sleep at all
const boolean vsync_with_match_refresh = cv_vidwait.value && cv_fpscap.value == 0;
if (elapsed > 0 && (INT64)capbudget > elapsed && !vsync_with_match_refresh)
{
I_SleepDuration(capbudget - (finishprecise - enterprecise));
}
}
// Capture the time once more to get the real delta time.
finishprecise = I_GetPreciseTime();
deltasecs = (double)((INT64)(finishprecise - enterprecise)) / I_GetPrecisePrecision();
deltatics = deltasecs * NEWTICRATE;
} }
} }