- tiffraw: Mode::Header parses the first LJ92 frame header (Compression 7),
so probe_info reports Unsupported for subsampled frames (Sony lossless
M/S) as the full decode does, instead of claiming the file decodes.
- corpus: CC0 ILCE-7M4 lossless L/M/S samples from raw.pixls.us in
`cargo xtask corpus`; M/S listed as known unsupported.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
DNG compression 34892: each tile / strip is a baseline JPEG of 8-bit samples (decoded with
zune-jpeg, pure Rust), then the usual linearization table, levels and crop apply. Per the DNG
specification. Lossy DNGs (Smart Previews, "lossy compression" DNG exports, many phone DNGs)
now open as raw files instead of falling back to their embedded preview. Unit test with
synthetic JPEG tiles (edge tile cut short); the corpus sample decodes (5760×3840 in 144 ms).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Decoders take a Mode: Header reads everything but the samples (DNG, CR2, ARW,
RAF, RW2; PEF when it has crop tags). NEF/ORF (and PEF without crop tags)
derive geometry/CFA from the samples and still unpack them. decode() stays
bit-exact (debug-hash of every corpus/raw decode identical before/after); the
corpus test asserts probe_info == decode().info() for all 37 files.
Import of 14 corpus raws: 3.4 s -> 1.4-2.0 s; peak RSS through import
1.41-1.49 GB -> 1.12-1.22 GB.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- lightcraft-raw: RawImage::develop_binned(k) — k×k superpixel binning of the CFA
(Bayer k even, X-Trans k multiple of 3), black/white normalised row by row, default
crop only, clipping preserved for highlight reconstruction. 2560 px previews of a
24 MP raw bin 2×, thumbnails 4–8×; exports / 1:1 still demosaic (AHD) at full size.
- highlight::reconstruct and its pyramid fill are rayon-parallel (bit-exact).
- X-Trans directional demosaic: precomputed per-phase neighbour offsets and no
reflection in the interior, no per-pixel allocation (bit-exact, tested against the
reference formulation): 2.9 s → 0.75 s CPU at 24 MP.
- files::load_bytes runs on a rayon worker so its short parallel loops don't each
wait for the pool to wake (dominant cost on a loaded machine); LIGHTCRAFT_PROFILE
prints per-stage source timings; files::bin_factor picks the block size.
- render_bench ONLY=source: per-file decode / normalise / demosaic / binning / load.
- Fix: u64 overflow on hostile IFD sizes in DNG/ARW/NEF raw-IFD selection (proptest).
load_bytes(2560) CPU time, ARW a7 III 24 MP: 2347 → 240 ms; X-T20: 3120 → 1220 ms.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- embedded_preview: CR3 PRVW/THMB boxes (plus RAF, RW2, ORF, PEF from the
format commits); stops at the first valid box of each kind
- engine: raw variants that report Unsupported are probed and shown from
their embedded JPEG (orientation from the JPEG or the raw), not an error
- crates/raw/tests/corpus.rs: every corpus/raw file is recognised, has a
JPEG preview (DNG optional) and decodes or is a known-unsupported
variant; prints decode timings
- xtask corpus --download: 37 CC0 raw.pixls.us samples (matched by SHA-256)
- ROADMAP/crate docs: format coverage, NEF Huffman / RW2 format 4 /
compressed ORF+RAF gaps, neutral colour-matrix fallback
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
