mirror of
https://github.com/RetroPortingToolKit/psxrecomp
synced 2026-10-26 02:11:36 -04:00
Matthew Stanley
50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
#!/usr/bin/env python3
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"""Guard PAL timing against 60 Hz host-refresh cadence leakage."""
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from pathlib import Path
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ROOT = Path(__file__).resolve().parents[2]
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MAIN = (ROOT / "runtime" / "src" / "main.cpp").read_text(encoding="utf-8")
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def require(needle: str, message: str) -> None:
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if needle not in MAIN:
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raise AssertionError(message)
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require(
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"static int host_refresh_matches_guest_cadence(void)",
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"host refresh must be compared against the active guest cadence",
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)
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require(
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"const double guest_hz = 1000.0 / g_guest_frame_period_ms;",
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"guest cadence must derive from the current frame period",
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)
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require(
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"return std::fabs(g_host_refresh_hz - guest_hz) <= guest_hz * 0.02;",
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"host refresh tolerance must be relative to the current guest cadence",
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)
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require(
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"if (host_refresh_matches_guest_cadence())",
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"host-refresh sync must not overwrite PAL timing from a hard-coded 60 Hz check",
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)
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require(
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"return host_refresh_matches_guest_cadence();",
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"driver vsync cadence ownership must respect the active guest cadence",
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)
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for forbidden in (
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"host_refresh_is_approx_60hz",
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"host_hz >= 58.8",
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"g_host_refresh_hz >= 58.8",
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"host_hz <= 61.2",
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"g_host_refresh_hz <= 61.2",
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):
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if forbidden in MAIN:
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raise AssertionError(
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f"PAL timing can leak back to the old 60 Hz-only cadence check: {forbidden}"
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)
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print("PAL host-refresh cadence guard passed")
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