Subj : src/doors/syncdoom/syncdoom.c
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Tue Jun 23 2026 00:45:22

https://gitlab.synchro.net/main/sbbs/-/commit/d494dace83cfbd93cb2f99d1
Modified Files:
	src/doors/syncdoom/syncdoom.c
Log Message:
syncdoom: fix Windows Terminal sixel regression (per-frame palette)

The define-once palette optimization assumed the terminal retains sixel
color registers across separate DCS images. SyncTERM does, but Windows
Terminal and xterm do NOT -- so frames that omitted the palette block
referenced undefined registers and rendered with wrong/default colors.

Gate define-once on g_is_syncterm; everywhere else re-send the palette
every frame. It's now the stable 1:1 register<->index set, so a per-frame
palette is identical each time (no churn) -- matches Deuce's guidance and
restores correct sixel on WT/xterm while keeping SyncTERM's define-once.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

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