Two changes:
Eliminate cloning in the publish path. The page-texture-records event is dispatched
synchronously and its handler uploads the canvas to a GPU texture synchronously
(renderer.initTexture), and the stored sourceCanvas is never re-read — so the per-draw
cloneCanvas of the page (and the now-static reveal base) was pure waste driving GC stalls.
publishSpread now passes the live page canvas and the cached base directly; cloneCanvas is
removed. Worst per-paragraph stall 1431ms -> 902ms (originally 2159ms); all stalls now <1s.
Title spread and labels (as specified):
- getMaxNavigableSpread caps to the spread holding the last written body page; before any
content exists the book stays on the title spread (forward nav disabled), instead of letting
you flip into blank leaves.
- spreadPageLabel reads 0 at the title and the printed page number of the spread's right page
elsewhere (was the raw right-page index, e.g. "3" before a game).
Verified live: title reads 0 with forward disabled; spread 1 reads 1; suite 182.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Georg
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