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d3d12: batch submissions to frame end while native output suppresses emulated draws

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This commit is contained in:
mchughalex 2026-07-21 13:24:29 +01:00
parent 17caf72bdd
commit 41dd2d5cb4
1 changed files with 8 additions and 1 deletions
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9
src/graphics/d3d12/command_processor.cpp
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@ -2497,7 +2497,14 @@ void D3D12CommandProcessor::IssueSwap(uint32_t frontbuffer_ptr, uint32_t frontbu
}
void D3D12CommandProcessor::OnPrimaryBufferEnd() {
if (REXCVAR_GET(d3d12_submit_on_primary_buffer_end) && submission_open_ &&
// While the native guest-output renderer is suppressing emulated draws,
// batch everything into the end-of-frame submission: the mid-frame
// primary-buffer submits carry only the small exempt composition passes,
// and the GPU then idles until the native pass arrives (a measured
// ~0.3 ms/frame starvation bubble). The emulated path keeps the
// per-buffer submits for its own pacing.
if (REXCVAR_GET(d3d12_submit_on_primary_buffer_end) &&
!ShouldSuppressEmulatedDraws() && submission_open_ &&
CanEndSubmissionImmediately()) {
EndSubmission(false);
}