https://gitlab.synchro.net/main/sbbs/-/commit/2925e44447e1ccb7e6b96a5e
Added Files:
xtrn/synchess/images/piece_mask.pbm
Modified Files:
xtrn/synchess/synchess.js
Log Message:
SynChess: add piece slide animation for all moves

AI moves flash the source square twice before sliding to draw
attention. Player moves slide immediately (board is redrawn first
to clear drag highlights). Castling animates both king and rook.

JXL mode uses flicker-free pixel animation with the two-mask trick
from syncterm-bounce.js: each frame draws the piece silhouette at
the new position, then erases the trail with an inverted mask that
has a hole preserving the piece just drawn. Both paste commands
are emitted in a single console.write() for atomic rendering.

ANSI fallback steps the piece character along the path with
ease-in-out timing, restoring board squares as it goes.

New file: piece_mask.pbm Ä 136x960 PBM containing draw masks
(piece silhouettes) and erase masks (inverted silhouettes with
48px border) for all 6 piece types.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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þ Synchronet þ Vertrauen þ Home of Synchronet þ [vert/cvs/bbs].synchro.net

https://gitlab.synchro.net/main/sbbs/-/commit/229a255d5d9dd75cf3e6d441
Added Files:
xtrn/synchess/images/piece_sprites.jxl
Modified Files:
xtrn/synchess/synchess.js
Log Message:
SynChess: pre-load all piece images into a sprite sheet buffer

Combine all 48 piece images (12 pieces ¨ 4 variants: dark, light,
cap, promo) into a single JXL sprite sheet loaded into pixel
buffer 1 at startup. All JXL drawing now uses Paste from the
buffer with SY offsets instead of DrawJXL from cache, avoiding
repeated disk reads.

Also remove the unnecessary final-position cleanup from the slide
animation Ä the piece remains drawn at its destination since
drawBoard() follows.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

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þ Synchronet þ Vertrauen þ Home of Synchronet þ [vert/cvs/bbs].synchro.net