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📚 Clarify Partial flush sync is on Full present

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Drop the stale ViewportReady wording from the HiDPI
render-wasm memory notes.

AI-assisted-by: composer-2
Co-authored-by: Cursor <cursoragent@cursor.com>
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Alejandro Alonso 2026-08-05 15:33:45 +02:00
parent c12bc0eab4
commit 215e054851
1 changed files with 1 additions and 1 deletions
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.serena/memories/render-wasm/ffi-rendering-subtleties.md
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@ -24,7 +24,7 @@
- Zoom changes rebuild the tile index while preserving cached tile textures. Avoid replacing that path with shallow rebuilds if blur/shadow cache preservation matters.
- Two-phase HiDPI zoom settle: (1) **Interactive** — one paint-once of **visible** tiles at DPR≤1 fill-rate (`tile_px=512`, `paint_scale≈zoom`); present + notify. (2) Deferred **Full** — `512*dpr` sprites, **visible+interest**, paint-once when the region fits (else per-tile). At DPR≤1 there is no Interactive phase. CTM must use `get_paint_scale()` / `get_raster_scale()`.
- Soft settle schedules `pending_sharp_promote` (next `continue`); do not stay Interactive forever.
- Partial frames **skip** GPU flush; hard sync in `present_frame` / ViewportReady.
- Partial frames **skip** GPU flush; hard sync belongs in `present_frame` / Full.
- Paint-once **resizes Current** to the region, restores viewport pad after present.
- Zoom-gesture preview: **DocAtlas only** when `zoom_changed` (no tile-sprite overlay). `invalidate_tile_cache` clears sprites only — not `DocAtlas::reset()`. `continue_render_loop` no-ops while `fast_mode && zoom_changed`.
- Full-quality `tile_px=1024` → ~16 atlas slots; `TileTextureCache::add` must not panic (see harden rules below).