Subj : src/doors/syncduke/syncduke.h syncduke_input.c syncduke_io.c
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Sun Jun 28 2026 00:21:32

https://gitlab.synchro.net/main/sbbs/-/commit/b19267dfa434ca3aa49aff8f
Modified Files:
	src/doors/syncduke/syncduke.h syncduke_input.c syncduke_io.c
Log Message:
syncduke: mouse-steer around the actual displayed image, not out_w

The mouse steer mapped the pointer column to a turn rate around the center of an
out_w x out_h image -- but the displayed image is now the fitted/centered sixel
(or the JXL fill), and out_w no longer describes it.  On a wide SyncTERM the sixel
anchors top-left (cursor ignored under ?80l) yet the steer assumed canvas-center,
so the neutral point was off.

present() now records the displayed image's actual horizontal center column and
half-width each frame -- accounting for tier and terminal (SyncTERM sixel top-left
vs JXL/elsewhere centered) -- and the steer reads that (syncduke_hsteer).  Replaces
syncduke_image_geometry, whose out_w-based centering is gone.

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

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