Retain projected paint geometry and grid across view updates

2026-11-09 17:47:44 +08:00
parent c6d77bdefd
commit 46fabafca8
5 changed files with 36 additions and 6 deletions
@@ -321,3 +321,10 @@ suspend native culling so extended paint is retained. This currently disables
 culling for the view rather than selectively retaining one node. Geometry
 extensions must declare their paint extent; undeclared DOM overflow cannot be
 inferred. Edge/overlay paint indexing and region-based drawing remain separate work.
+
+`createProjectedPaintIndex` retains the grid per engine/view and caches each node's
+paint result by projected node identity, immutable record identity and canvas
+transform. Unchanged nodes reuse their geometry result; removed nodes release
+cache entries. Viewport queries reuse the grid. `clear()` discards it. The cache
+still scans projected nodes and synchronizes rectangle membership; it is not a
+claim of constant-time full-frame updates or complete region-based drawing.