74 lines
7.0 KiB
Markdown
74 lines
7.0 KiB
Markdown
# LightCraft roadmap
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Milestones toward full Adobe Lightroom parity (cloud Lightroom first, then every Lightroom Classic module), with wall-clock
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estimates for continuous (24/7) agent-driven development with 4–6 parallel agents. Estimates are calibrated on the sibling
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projects (DrawCraft reached its first four milestones in ≈ 4½ h) and are revised as milestones land.
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**Status legend:** ✅ done · 🚧 in progress · ⬜ not started
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| # | Milestone | Scope (summary) | Estimate (h) | Status |
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| M0 | Skeleton + visual shell | workspace, xtask CI + layering, geom/color/raster, develop model, pipeline v0, catalog v0, engine commands, Lightroom-look UI (grid, loupe, filmstrip, Edit panel), control channel, MCP, web build | 3–5 | 🚧 (UI, pipeline, engine, control channel ✅; MCP/CLI, web 🚧) |
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| M1 | Library core | import (JPEG/PNG/TIFF/WebP), EXIF/XMP, persistent catalog (op log + snapshots), albums, ratings/flags/labels, filter/search/sort, thumbnail cache, 100k-photo grid | 6–10 | 🚧 (import, codecs, EXIF/XMP, albums, search ✅; persistence 🚧) |
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| M2 | Pipeline v1 (quality) | WB temp/tint, profiles, local tone mapping (highlights/shadows), curves, HSL, point colour, colour grading, texture/clarity/dehaze, vignette, grain, B&W, auto tone/WB, histogram, before/after | 10–15 | ⬜ |
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| M3 | RAW I | TIFF/DNG (LJ92, deflate, tiles, opcodes), demosaic (AHD/PPG/bilinear), highlight recovery, DNG colour model, CR2, NEF, ARW, embedded previews | 10–15 | 🚧 (DNG, CR2, ARW, NEF uncompressed, embedded previews ✅; NEF Huffman ⬜) |
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| M4 | Crop, geometry, optics | crop tool + overlays, straighten, Upright (auto/level/vertical/full/guided), manual transforms, CA, defringe, manual lens corrections | 6–10 | ⬜ |
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| M5 | Performance | source pyramids, wgpu compute pipeline (CPU oracle), draft/full renders, prefetch, budgets (16 ms slider updates on 24 MP) | 10–15 | ⬜ |
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| M6 | Masking | brush, linear/radial gradients, colour/luminance/depth range, add/subtract/intersect/invert, all local adjustments, masks panel | 8–12 | ⬜ |
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| M7 | Detail | sharpening + masking preview, luminance/colour NR, Denoise, Raw Details, Super Resolution | 6–10 | ⬜ |
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| M8 | Heal / Remove | content-aware remove (PatchMatch), heal, clone, brush spots, visualize spots, red/pet eye | 6–10 | ⬜ |
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| M9 | Presets, profiles, versions, sync | preset browser + amount, create/import presets, profile browser, versions, history, copy/paste/sync settings | 5–8 | ⬜ |
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| M10 | Export & share | export dialog (JPEG/PNG/TIFF/DNG/AVIF/JXL/original), sizing, sharpening, metadata, watermark, naming, batch jobs, XMP sidecars, HDR export | 6–10 | ⬜ |
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| M11 | RAW II | CR3, RAF (X-Trans), ORF, RW2, PEF, SRW, 3FR, IIQ + long tail; camera calibration DB; HEIC/AVIF/JXL import | 20–35 | 🚧 (RAF uncompressed, RW2 packed, PEF, ORF uncompressed ✅) |
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| M12 | AI & smart features | subject/sky/background/people/object masks, semantic search, faces/People (permissively licensed models, pure-Rust inference) | 20–40 | ⬜ |
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| M13 | Merge | HDR merge (deghost), panorama (projections, boundary warp, fill edges), HDR panorama | 10–15 | ⬜ |
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| M14 | Video | import/playback/trim via FilmCraft crates, global edits + presets on video, video export | 6–10 | ⬜ |
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| M15 | Classic modules | Map, Book, Slideshow, Print, Web; smart collections, stacks, virtual copies, publish services, tethering | 25–40 | ⬜ |
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| M16 | 1.0 polish | preferences, shortcut editor, accessibility, localization, packaging (dmg/msi/AppImage/web), hardening | 10–20 | ⬜ |
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## Totals
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| Target | Milestones | Wall-clock estimate |
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| Cloud-Lightroom feature complete | M0–M11, M13–M14 | **≈ 130–180 h** (6–8 days, 24/7) |
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| Full parity incl. Classic modules and AI | M0–M16 | **≈ 200–300 h** (9–13 days, 24/7) |
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## Risks that coding hours alone don't retire
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- **AI features** (subject/sky/people masks, generative remove) need model weights with licences we can ship; classical
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fallbacks first. No permissively licensed sky-segmentation or raw-denoise model was found — we may need to train our own.
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- **Camera colour and lens data** is a data problem: we never use Adobe's matrices, DCPs or LCPs. DNG-embedded data first,
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then our own calibration; long-tail camera/lens coverage grows over time.
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- **Legal decisions pending:** whether GPL-licensed *prose* format descriptions (e.g. the public CR3 write-up) may be read
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by a designated engineer to produce an internal spec; freedom-to-operate review for local Laplacian filters, PatchMatch and
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HEVC (HEIC).
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- **Look parity** with Adobe's default rendering is subjective tuning against our own reference targets.
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## Raw format coverage and known gaps
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Decoded (CC0 corpus from raw.pixls.us, `cargo xtask corpus --download`, `crates/raw/tests/corpus.rs`): DNG (uncompressed,
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LJ92, Deflate, float, linear), CR2, ARW (uncompressed, ARW2, LJ92), NEF/NRW uncompressed, RAF uncompressed (Bayer and
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X-Trans), RW2 packed 12/14-bit, PEF (uncompressed and Huffman), ORF uncompressed (16-bit and 12-bit packed). Every
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supported container also yields its embedded JPEG preview (CR3 too), and the engine shows that preview for raw variants
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it can't decode yet.
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Not decoded yet — preview only (no permissively licensed description; black-box analysis incomplete):
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- **Nikon Huffman NEF** (lossless / lossy). Black-box findings so far: maker note `0x0096` holds per-parity predictor
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seeds (2048 for 14-bit lossless); ≈ 9 bits per pixel; the category-0 code word is a 6-bit rotation of `011111`. The
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Huffman tables are not stored in the files, and an automatic table search (beam search over prefix codes scored by
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smoothness and bit rate, validated on Pentax files whose tables *are* stored) did not converge.
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- **Panasonic RW2 raw format 4** (quantised): the block layout is known (0x4000-byte chunks rotated by 0x1ff8; 128-bit
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blocks of two 12-bit seeds plus four groups of a 2-bit scale and three 8-bit codes; scales 0/1 are ×1/×2 differences
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from the same-colour pixel two to the left), the reconstruction rule for scales 2/3 is not established.
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- **Olympus compressed ORF**, **Fujifilm compressed RAF**, **Canon CR3/CRX** (M11.1), **Canon sRAW/mRAW**, lossy DNG.
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**Camera colour matrices:** non-DNG raws use the documented neutral fallback (camera RGB ≈ linear sRGB, flagged
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`matrix_is_fallback`) with the file's as-shot white-balance multipliers. Clean sources to evaluate next: manufacturer
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matrices stored in the files themselves (Olympus ImageProcessing `ColorMatrix`, Pentax/Panasonic equivalents) and our
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own chart-based calibration (M11.4). Adobe matrices are never used.
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## Log
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- 2026-09-30: roadmap created; M0 in progress; research docs (Lightroom reference, Rust imaging ecosystem) complete.
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- 2026-09-30 (later): app running with the full Lightroom-style UI; pipeline v0; DNG/CR2/ARW; README showcase. ≈ 8 h elapsed.
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- 2026-10-01: RAW II formats: RAF (uncompressed Bayer + X-Trans), RW2 (packed), PEF (incl. Huffman), ORF (uncompressed); embedded previews for every container incl. CR3; raw corpus test with 37 CC0 samples.
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