Subj : xtrn/zmachine/tools/blorb2gfx.js xtrn/zmachine/zmachine.js
To   : Git commit to main/sbbs/master
From : Rob Swindell (on Debian Linux)
Date : Sun Jun 21 2026 20:33:42

https://gitlab.synchro.net/main/sbbs/-/commit/20cd3aff4986cbf19a3c9bfb
Modified Files:
	xtrn/zmachine/tools/blorb2gfx.js xtrn/zmachine/zmachine.js
Log Message:
xtrn/zmachine: Windows/ImageMagick fixes for v6 graphics baking

Surfaced by a Windows install report (X-Bit / X-Bit BBS) of Arthur's v6 scenes
rendering washed-out in SyncTERM.

- blorb2gfx.js + v6scaledFile: prefer ImageMagick 7's unified "magick" command,
  fall back to "convert". On Windows, bare "convert" is the OS disk-format tool
  that shadows ImageMagick on the PATH, silently breaking the bake.

- blorb2gfx.js: place "-depth 8" AFTER the input so PPM output is forced to
  maxval 255. On ImageMagick 7, -depth before the input is only a read setting,
  so a 4-bit (16-colour) Blorb source wrote maxval 15 -- which SyncTERM renders
  washed-out (and which looks "fine" in GIMP, since GIMP normalises maxval).
  Latent on every IM7 host, not just Windows. The -gamma 0.55 pre-darken (to
  cancel SyncTERM's pnm_gamma) is unchanged and still applied.

- zmachine.js: require("userdefs.js") instead of load() -- sbbsdefs.js already
  require()s it, so a 2nd load() re-executes it (idempotent require avoids the
  redundant re-declaration); best practice regardless.

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

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