Files
LEDMatrix/test
ChuckandClaude Sonnet 5.5 eb8128a981 feat(display): cancel the half-panel scan offset on slower, held-frame scrolls (#711)
Scan-order compensation only ran at one frame per refresh, so a crisp scroll
like 60 px/s on a 120 Hz panel (1px every 2 refreshes) showed a half-pixel
step across the middle of the panel. A held frame is now presented as a
sequence of swaps (scan_order.refresh_plan): the lagging half shows the
previous frame for its first refresh and the new one for the rest, so it
steps one refresh after the rest. Skipped when a blit takes over half a
refresh, since the second blit has to land before the next vsync.

Soaked on ledpi (60 px/s, 120 Hz): 0.16% late frames, as before the change.

Co-authored-by: Claude Sonnet 5.5 <noreply@anthropic.com>
2026-10-01 14:32:24 -04:00
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