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docs: mark Phase 3d (raster undo dirty-rect diffs) done

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Skyler Lehmkuhl 2026-06-20 21:31:48 -04:00
parent aae51e3b3c
commit c627533185
1 changed files with 8 additions and 4 deletions
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STREAMING_TO_DISK_PLAN.md
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@ -361,10 +361,14 @@ now shows tracked VRAM (raster cache MB + count). *(Refinements: count→byte bu
if >12 raster layers are visible at once. Export `raster_cache` lives one export — fine. Vello if >12 raster layers are visible at once. Export `raster_cache` lives one export — fine. Vello
`ImageCache` is image *assets* → Phase 4.)* `ImageCache` is image *assets* → Phase 4.)*
### 3d. Undo memory ### 3d. Undo memory **[DONE]**
`RasterStrokeAction`/`RasterFillAction` hold `buffer_before`+`buffer_after` full frames `RasterStrokeAction`/`RasterFillAction` stored `buffer_before`+`buffer_after` full frames.
(`raster_stroke.rs:20`). Switch to **dirty-rect diffs** (store only the changed bbox before/after; Now store a `RasterDiff` (`actions/raster_diff.rs`) — changed bbox before/after only, computed in
full-canvas fills compressed). Independent of 3a–3c. `new()`, full buffers dropped. Undo/redo apply onto the keyframe's resident pixels; the editor
faults the target frame in first (`Action::raster_resident_hint` + `peek_undo/redo_raster_hint`),
correct because a clean evicted frame's container bytes == its logical state. Non-resident base ⇒
skip (no corruption). Unit-tested round-trip. *(Refinement: compress full-canvas-fill diffs, whose
bbox is the whole frame.)*
### 3e. Prefetch frames *(future, after 3d — pure latency win, no correctness need)* ### 3e. Prefetch frames *(future, after 3d — pure latency win, no correctness need)*
Fault-in is reactive (page in only on a render miss), so a never-visited frame still shows the Fault-in is reactive (page in only on a render miss), so a never-visited frame still shows the