- settings.toml parses [video] vsync = "vrr" and a launcher save writes it
back as "vrr" (was dropped / saved as "on"); every mode round-trips in
video_enhancement_settings_test.
- fg_slots counts the display intervals the clock (fg_clock_phase) fills,
with the same 0.985 phase limit. fg_plan_hz and the dynamic resolution
share use it: 59.94 Hz content on a 60 Hz panel (2.002 intervals) plans
and budgets one in-between frame, as shown, not two.
- The real share read on the emulation thread uses atomics: s_fg_flip_vb,
s_fg_swap_ema and a published copy of the generated-frame cost estimate.
- fg_hud_lerp accepts a match at the 8th 2D triangle of the window.
- docs/FRAME_GENERATION.md: the plan's slots and the vrr mode.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Shokunin
8948e9584c