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docs: mark Phase 3a-3 (image proxy) done

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Skyler Lehmkuhl 2026-06-20 21:09:13 -04:00
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STREAMING_TO_DISK_PLAN.md
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@ -326,7 +326,12 @@ clone). Not worth 64 edits. Start at 3a.
armed recursively; canvas records misses → App pages in via `RasterStore.load_pixels`. armed recursively; canvas records misses → App pages in via `RasterStore.load_pixels`.
- **[DONE 3a-2]** Async: page-in runs on a background thread (deduped via `raster_loads_inflight`); - **[DONE 3a-2]** Async: page-in runs on a background thread (deduped via `raster_loads_inflight`);
results applied at top of `update()`. No UI block on cold scrub. results applied at top of `update()`. No UI block on cold scrub.
- **[TODO 3a-3]** Image proxy (below) to remove the brief blank gap before a full PNG lands. - **[DONE 3a-3]** Image proxy: `MediaKind::RasterProxy` (≤192px PNG, derived id), written
beside each resident full PNG on save + eager-decoded on load into `RasterKeyframe::proxy`.
Separate `proxy_layer_cache` (own LRU, budget 64); the raster render blits the proxy mapped to
the keyframe's FULL logical dims (upscales via sampler) when the full texture isn't resident.
*(Proxies exist only after a save+reload; eager decode → lazy/paged is a refinement for huge
paint projects.)*
- **`RasterStore`** (core): current `.beam` path + a read-only connection; `load_pixels(kf_id,w,h)` - **`RasterStore`** (core): current `.beam` path + a read-only connection; `load_pixels(kf_id,w,h)`
reads the `Raster` row and `decode_png`s it. Set/cleared by the editor on load + save-as. reads the `Raster` row and `decode_png`s it. Set/cleared by the editor on load + save-as.