https://gitlab.synchro.net/main/sbbs/-/commit/ced6dbbaecd42f31c0ac5000
Modified Files:
src/doors/termgfx/stats.c termgfx_termio.c
Log Message:
termgfx: true aspect on the fitted image, and don't call 1fps "no data"

Two things a live F4 sixel session on SyncTERM turned up, neither of them
new.

THE SHAPE. termgfx_geom_fit()'s 8% allowance stretches away a thin
leftover bar so a near-fit fills the canvas, which is right where the bar
is an accident of the canvas. It is wrong here, because the sixel tier manufactures its own: it reserves the bottom text row for the stats and
idle strips, so a canvas that fitted exactly becomes height-limited and
leaves a side bar, which the allowance then hides by stretching the
picture back out. At 80x25 that is a 4% vertical squash -- 640x384 where
the source wants 614x384 -- while the JXL tier reserves nothing, fits
640x400 exactly, and stays true. Two tiers disagreeing about the shape of
the same game is the tell, and only that geometry shows it: on a canvas
where the fit is width-limited there is no bar and nothing stretches,
which is why it survived the measurements taken there.

Fit at true aspect instead (max_stretch_pct 0), which is what
syncconquer's own fit already passes. Letterboxing 13px a side is the
cheaper mistake than reshaping the game.

THE READOUT. fps was frames * 1000 / elapsed, truncated. A window is ~1s,
so a scene drawing ONE frame in it came out as zero -- and the strip
renders zero as "-fps -KB/f", which means "nothing drawn yet". A slow but perfectly healthy scene (an adventure sitting in a static room with one
banner animating) reported itself as dead. Round instead of truncate, and
keep a flag for "a window has closed with frames in it" so "-" can only
ever mean startup. Bytes per frame now comes straight from the window
rather than from dividing two rounded numbers, which lost accuracy exactly where the numbers are small. The same truncation was in stats.c's shared window, so the sibling doors under-reported slow scenes too; fixed there
as well.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
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