https://gitlab.synchro.net/main/sbbs/-/commit/990418baddfa1cbfa276ed88
Modified Files:
src/doors/syncretro/syncretro.h syncretro_input.c syncretro_io.c
Log Message:
syncretro: hide the client's status line to reclaim its row

A terminal that shows a status line reserves its bottom text row for it -- SyncTERM's default turns an 80x25 / 640x400 client into an 80x24 / 640x384 canvas -- so the door fractionally downscales every frame and loses single-pixel detail for nothing. That row matters more here than for a landscape console: an upright arcade game is height-bound.

termgfx has had the DECSSDT seam for this all along, and syncduke, syncdoom, syncconquer and syncscumm all use it; SyncRetro was the one door that never adopted it. Emit termgfx_term_status_off BEFORE the canvas probe so the
probe reports the reclaimed size -- after it, the door would scale to the
old canvas and the row would go to waste.

The sequence is prefixed with a DECRQSS query of the current setting; syncretro_input.c captures the reply (rolling window, since a 10-byte DCS
can arrive split over a BBS link) so sr_io_leave() restores the player's
status line to what it WAS rather than guessing. The BBS lent us the
terminal; a door that hides the sysop's status line and never puts it back
has broken his client. Falls back to 1 (indicator, SyncTERM's own default)
if the terminal never answers. Terminals with no status line, or no
DECSSDT, ignore the whole thing.

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