From 8b4bdcea110f9db2eb0a5aa7986907811e4bedb3 Mon Sep 17 00:00:00 2001 From: radialmonster Date: Sat, 10 Oct 2026 00:36:40 -0400 Subject: [PATCH] LR-IMP-FORMATS: decode Nikon small raw (sRAW) NEFs as 4:2:2 luma/chroma --- crates/engine/src/media.rs | 2 +- crates/raw/src/vendor/nef.rs | 253 +++++++++++++++++++++++++++++++++-- docs/parity-checklist.md | 2 +- 3 files changed, 242 insertions(+), 15 deletions(-) diff --git a/crates/engine/src/media.rs b/crates/engine/src/media.rs index 292a9fb1e..e76ef8169 100644 --- a/crates/engine/src/media.rs +++ b/crates/engine/src/media.rs @@ -62,7 +62,7 @@ impl SettingsHashes { } /// Bump when the pipeline's output changes, to invalidate cached thumbnails. -pub const RENDER_CACHE_VERSION: u64 = 69; +pub const RENDER_CACHE_VERSION: u64 = 70; /// Thumbnails render at one of these long edges (so window/cell size changes reuse the cache). pub const THUMB_SIZES: [usize; 4] = [128, 256, 384, 512]; diff --git a/crates/raw/src/vendor/nef.rs b/crates/raw/src/vendor/nef.rs index 62c9a2505..c404a2e29 100644 --- a/crates/raw/src/vendor/nef.rs +++ b/crates/raw/src/vendor/nef.rs @@ -8,8 +8,9 @@ //! (HE / HE★, Z 8, Z 9, Z 6III, Z f): they keep compression 34713 but carry a wavelet codestream that starts with //! the JPEG XS markers SOC + CAP (ISO/IEC 21122-1, `FF10 FF50`) and have no `0x0096` table (issue #193). //! Strips labelled 34713 without a `0x0096` -//! linearization table are packed uncompressed data in several measured layouts ([`PackedLayout`]); Nikon small raw -//! (sRAW) and the D1X's genuinely Huffman-coded strip stay refused. +//! linearization table are packed uncompressed data in several measured layouts ([`PackedLayout`]) or, when the strip +//! is exactly three bytes per pixel, Nikon small raw ([`small_raw`]); the D1X's genuinely Huffman-coded strip stays +//! refused. use super::{nefc, white_from_data}; use crate::tiffraw::{Packing, check_image, read_image}; @@ -233,6 +234,9 @@ pub(crate) fn decode(bytes: &[u8], mode: Mode) -> Result { let make = ifd0.string(t::MAKE).unwrap_or_default(); let mn = tiff.exif().and_then(|e| e.get(t::MAKER_NOTE)).and_then(|e| makernote::parse_makernote(bytes, e.offset, e.count() as u64, tiff.order, &make)); + if let Some(strip) = small_raw_strip(&info, bytes.len(), mn.as_ref()) { + return small_raw(bytes, &tiff, &info, strip, mode); + } // the header probe reads only the rows the masked-column test needs let rows = match mode { Mode::Full => h, @@ -494,14 +498,7 @@ fn packed(bytes: &[u8], info: &ImageInfo, rows: usize) -> Result { _ => None, }; let (Some(layout), [c]) = (layout, chunks.as_slice()) else { - let small = bits == 12 - && chunks.len() == 1 - && w.checked_mul(h).and_then(|n| n.checked_mul(3)).is_some_and(|n| u64::try_from(n).ok() == Some(chunks[0].len)); - return Err(RawError::Unsupported(if small { - "Nikon small raw (sRAW) not decoded yet".into() - } else { - "Nikon compressed NEF without a linearization table (maker note 0x96)".into() - })); + return Err(RawError::Unsupported("Nikon compressed NEF without a linearization table (maker note 0x96)".into())); }; let src = lightcraft_tiff::image::chunk_bytes(bytes, c) .filter(|src| u64::try_from(src.len()).ok() == Some(c.len)) @@ -512,6 +509,126 @@ fn packed(bytes: &[u8], info: &ImageInfo, rows: usize) -> Result { Ok(RawData::U16(unpack_packed(src, w, rows.min(h), bits, layout))) } +/// Nikon small raw (sRAW), measured clean-room from the CC0 raw.pixls.us D810 (2036) and D4S (2227) samples. The raw SubIFD is labelled compression 34713, +/// 12 bits, one CFA sample per pixel, but it carries no linearization table (maker note `0x0096`) and its single strip +/// is exactly `3 * width * height` bytes. It holds a YCbCr 4:2:2 image of the IFD size, not a CFA mosaic (the CFA +/// tags are dummies): +/// +/// - the strip is an LSB-first 12-bit stream (`s0 = b0 | (b1 & 0x0f) << 8`, `s1 = b1 >> 4 | b2 << 4`), a row is `3 * width` +/// bytes with no padding, i.e. `2 * width` samples; +/// - the samples come in groups of four, `[Y_left, Y_right, Cb, Cr]`, for the pixel pair `(2k, 2k + 1)`: chroma is +/// halved horizontally and not vertically; +/// - luma is linear and already black-subtracted (the darkest samples are near 0) and never uses the top two bits +/// (maxima 873 and 1004 of 4095), so the white level is 1023; chroma is centred on 2048 (fitted neutral 2045-2049). +/// +/// The chroma is a camera colour-difference scale, not JFIF Cb/Cr. In linear terms the stored values behave as +/// `R - Y = R_GAIN * (Cr - 2048)` and `B - Y = B_GAIN * (Cb - 2048)` on the luma scale: regressing the camera JPEG's +/// linear `(R - Y) / Y` and `(B - Y) / Y` on `(Cr - 2048) / Y` and `(Cb - 2048) / Y` over mid-tone pixels gave slopes +/// 4.92 / 5.09 (D810, correlation 0.94 / 0.88) and 3.52 / 3.73 (D4S, 0.98 / 0.97); the gains below are the rounded +/// means. They are approximate (the two bodies differ by about 30 %), the luma is not tone-mapped, and the data is +/// treated as already white balanced (neutral D4S areas have `Cb`, `Cr` within 2 of 2048 and equal JPEG R, G, B). G +/// follows from the luma equation with the BT.601 weights. The chroma is upsampled horizontally with linear +/// interpolation, centred between the two pixels of a pair. Output is linear RGB scaled by 16 (to a 14-bit range), +/// like Sony's downsized ARWs. +const SMALL_RAW_WHITE: f32 = 1023.0; +const SMALL_RAW_SCALE: f32 = 16.0; +const SMALL_RAW_CHROMA_ZERO: f32 = 2048.0; +const SMALL_RAW_R_GAIN: f32 = 4.2; +const SMALL_RAW_B_GAIN: f32 = 4.4; + +/// The strip of a small raw: compression 34713, 12 bits, no maker note `0x0096`, one strip of exactly +/// `3 * width * height` bytes (even width). +fn small_raw_strip(info: &ImageInfo, file_len: usize, mn: Option<&makernote::MakerNote>) -> Option { + if info.compression != t::compression::NIKON || info.bits() != 12 || info.samples_per_pixel != 1 { + return None; + } + if mn.is_some_and(|m| m.ifd.bytes(LINEARIZATION_TABLE).is_some()) { + return None; + } + let (w, h) = (info.width as u64, info.height as u64); + let chunks = info.chunks(file_len as u64); + match chunks.as_slice() { + [c] if w.is_multiple_of(2) && w > 0 && h > 0 && w.checked_mul(h).and_then(|n| n.checked_mul(3)) == Some(c.len) => Some(*c), + _ => None, + } +} + +/// Decode one row of a small raw (`3 * width` bytes) into `3 * width` linear RGB values on the 14-bit scale. +/// Short input reads as zero bytes. +fn small_raw_row(src: &[u8], w: usize, out: &mut [u16]) { + let Some(n) = w.checked_mul(3).filter(|n| *n <= out.len() && *n <= crate::MAX_SAMPLES) else { return }; + if w == 0 || !w.is_multiple_of(2) { + return; + } + let mut s = vec![0u16; 2 * w]; + crate::unpack::unpack_lsb(&src[..src.len().min(n)], 12, &mut s); + let pairs = w / 2; + let chroma = |k: usize| { + let g = &s[4 * k + 2..4 * k + 4]; + (f32::from(g[0]) - SMALL_RAW_CHROMA_ZERO, f32::from(g[1]) - SMALL_RAW_CHROMA_ZERO) + }; + for k in 0..pairs { + let (cb, cr) = chroma(k); + for side in 0..2 { + let (nb, nr) = if side == 0 { chroma(k.saturating_sub(1)) } else { chroma((k + 1).min(pairs - 1)) }; + let (u, v) = (0.75 * cb + 0.25 * nb, 0.75 * cr + 0.25 * nr); + let y = f32::from(s[4 * k + side]); + let r = y + SMALL_RAW_R_GAIN * v; + let b = y + SMALL_RAW_B_GAIN * u; + let g = (y - 0.299 * r - 0.114 * b) / 0.587; + let dst = (2 * k + side) * 3; + for (i, value) in [r, g, b].into_iter().enumerate() { + out[dst + i] = (value * SMALL_RAW_SCALE).round().clamp(0.0, 65535.0) as u16; + } + } + } +} + +fn small_raw(bytes: &[u8], tiff: &Tiff, info: &ImageInfo, strip: lightcraft_tiff::image::Chunk, mode: Mode) -> Result { + use rayon::prelude::*; + let (w, h) = (info.width as usize, info.height as usize); + let stride = w.checked_mul(3).ok_or(RawError::Limit("image too large"))?; + let count = stride.checked_mul(h).filter(|n| *n > 0 && *n <= crate::MAX_SAMPLES).ok_or(RawError::Limit("image too large"))?; + let src = lightcraft_tiff::image::chunk_bytes(bytes, &strip).ok_or_else(|| RawError::Corrupt("NEF: image data outside the file".into()))?; + let data = match mode { + Mode::Full => { + let mut data = vec![0u16; count]; + data.par_chunks_mut(stride).enumerate().for_each(|(y, out)| { + small_raw_row(src.get(y * stride..).unwrap_or(&[]), w, out); + }); + data + } + Mode::Header => Vec::new(), + }; + let mut metadata = lightcraft_meta::from_tiff(tiff); + metadata.width = Some(w as u32); + metadata.height = Some(h as u32); + let img = RawImage { + format: RawFormat::Nef, + width: w, + height: h, + cpp: 3, + data: RawData::U16(data), + cfa: None, + bits: 14, + black: BlackLevel::uniform(0.0), + white: vec![SMALL_RAW_WHITE * SMALL_RAW_SCALE], + active_area: Rect::new(0, 0, w, h), + crop: Rect::new(0, 0, w, h), + orientation: Orientation::from_exif(tiff.ifds.first().and_then(|i| i.u16(t::ORIENTATION)).unwrap_or(1)), + color: ColorData::default(), + // the stored colour is already white balanced (see above) + wb_multipliers: Some([1.0; 3]), + linearized: false, + pixel_aspect: 1.0, + opcodes: OpcodeLists::default(), + metadata, + lens_metadata: Default::default(), + }; + img.validate_for(mode)?; + Ok(img) +} + #[cfg(test)] mod tests { use super::*; @@ -1089,9 +1206,119 @@ mod tests { // 14-bit rows must be padded to 16 bytes let d14 = samples(40 * 6, 14); assert!(matches!(decoded(strip(&d14, 40, 0, |r| pack_lsb(r, 14)), 14, 40, 6), Err(RawError::Unsupported(_)))); - // 3 bytes per IFD-width pixel is a Nikon small raw: still refused, with its own reason - let Err(RawError::Unsupported(why)) = decoded(vec![0; 3 * 40 * 6], 12, 40, 6) else { panic!("small raw decoded") }; - assert!(why.contains("sRAW"), "{why}"); + } + + /// A small raw strip of `[Y0 Y1 Cb Cr]` groups, rows of `3 * w` bytes, LSB-first 12-bit. + fn small_strip(groups: &[[u16; 4]], w: usize) -> Vec { + let flat: Vec = groups.iter().flatten().copied().collect(); + assert_eq!(flat.len() % (2 * w), 0); + flat.chunks(2 * w).flat_map(|r| pack_lsb(r, 12)).collect() + } + + fn small(strip: Vec, bits: u16, w: u32, h: u32) -> Result { + crate::decode(&nef(34713, bits, vec![strip], w, h, h)) + } + + #[test] + fn small_raw_422_round_trips() { + let (w, h) = (8usize, 3usize); + // flat chroma per row so the interpolation is exact; distinct luma everywhere + let mut groups = Vec::new(); + for y in 0..h { + for k in 0..w / 2 { + let (cb, cr) = (2048 + 10 * y as u16, 2048 - 5 * y as u16); + groups.push([100 + (y * w + 2 * k) as u16, 100 + (y * w + 2 * k + 1) as u16, cb, cr]); + } + } + let raw = small(small_strip(&groups, w), 12, w as u32, h as u32).unwrap(); + assert_eq!((raw.width, raw.height, raw.cpp, raw.cfa.is_none()), (w, h, 3, true)); + assert_eq!(raw.wb_multipliers, Some([1.0; 3])); + let RawData::U16(d) = &raw.data else { panic!() }; + for y in 0..h { + for x in 0..w { + let luma = (100 + y * w + x) as f32; + let (u, v) = (10.0 * y as f32, -5.0 * y as f32); + let (r, b) = (luma + SMALL_RAW_R_GAIN * v, luma + SMALL_RAW_B_GAIN * u); + let g = (luma - 0.299 * r - 0.114 * b) / 0.587; + for (i, want) in [r, g, b].into_iter().enumerate() { + let got = f32::from(d[(y * w + x) * 3 + i]) / SMALL_RAW_SCALE; + assert!((got - want).abs() < 0.1, "({x},{y}) channel {i}: {got} vs {want}"); + } + } + } + } + + #[test] + fn small_raw_neutral_chroma_is_grey_and_chroma_is_interpolated() { + let w = 8usize; + let groups: Vec<[u16; 4]> = (0..w / 2).map(|k| [200 + 40 * k as u16, 200 + 40 * k as u16, 2048, 2048]).collect(); + let raw = small(small_strip(&groups, w), 12, w as u32, 1).unwrap(); + let RawData::U16(d) = &raw.data else { panic!() }; + for x in 0..w { + let px = &d[x * 3..x * 3 + 3]; + assert!(px.iter().all(|&v| v == px[0]), "{px:?}"); + assert_eq!(f32::from(px[0]), (200 + 40 * (x / 2)) as f32 * SMALL_RAW_SCALE); + } + // a step in Cb between the first two pairs is shared 3:1 by the pixels next to the boundary + let mut groups = groups; + groups[1][2] = 2048 + 100; + let raw = small(small_strip(&groups, w), 12, w as u32, 1).unwrap(); + let RawData::U16(d) = &raw.data else { panic!() }; + let blue_minus_luma = |x: usize, luma: f32| f32::from(d[x * 3 + 2]) / SMALL_RAW_SCALE - luma; + assert!((blue_minus_luma(1, 200.0) - SMALL_RAW_B_GAIN * 25.0).abs() < 0.1); + assert!((blue_minus_luma(2, 240.0) - SMALL_RAW_B_GAIN * 75.0).abs() < 0.1); + } + + #[test] + fn small_raw_wrong_sizes_and_depths_are_refused() { + let (w, h) = (8usize, 3usize); + let good = small_strip(&vec![[100, 100, 2048, 2048]; w / 2 * h], w); + assert!(small(good.clone(), 12, w as u32, h as u32).is_ok()); + for len in [good.len() - 1, good.len() + 1] { + let mut s = good.clone(); + s.resize(len, 0); + assert!(matches!(small(s, 12, w as u32, h as u32), Err(RawError::Unsupported(_))), "len {len}"); + } + assert!(matches!(small(good.clone(), 14, w as u32, h as u32), Err(RawError::Unsupported(_)))); + // odd width: 3 bytes per pixel does not split into pixel pairs + assert!(matches!(small(vec![0; 3 * 7 * 3], 12, 7, 3), Err(RawError::Unsupported(_)))); + } + + #[test] + fn small_raw_short_input_does_not_panic() { + for len in [0, 1, 2, 3, 5, 11, 12, 13] { + let mut out = vec![0u16; 12]; + small_raw_row(&vec![0xFF; len], 4, &mut out); + } + let mut bytes = nef(34713, 12, vec![vec![0x55; 3 * 8 * 3]], 8, 3, 3); + bytes.truncate(bytes.len() - 40); + assert!(crate::decode(&bytes).is_err(), "a truncated small-raw strip is corrupt"); + } + + #[test] + fn small_raw_header_has_full_geometry_without_allocating_pixels() { + let (w, h) = (8usize, 3usize); + let bytes = nef(34713, 12, vec![small_strip(&vec![[100, 110, 2048, 2048]; w / 2 * h], w)], w as u32, h as u32, h as u32); + let header = decode(&bytes, Mode::Header).unwrap(); + let full = decode(&bytes, Mode::Full).unwrap(); + assert_eq!(header.info(), full.info()); + assert!(matches!(header.data, RawData::U16(ref samples) if samples.is_empty())); + assert!(matches!(full.data, RawData::U16(ref samples) if samples.len() == 3 * w * h)); + } + + #[test] + fn small_raw_rejects_excessive_dimensions_before_allocation() { + let bytes = nef(34713, 12, vec![vec![0; 72]], 8, 3, 3); + let tiff = Tiff::parse(&bytes).unwrap(); + let mut info = raw_ifd(&tiff).unwrap().image().unwrap(); + let strip = info.chunks(bytes.len() as u64)[0]; + info.width = u32::MAX - 1; + info.height = u32::MAX; + assert!(matches!(small_raw(&bytes, &tiff, &info, strip, Mode::Header), Err(RawError::Limit(_)))); + let mut out = [0; 12]; + small_raw_row(&[], usize::MAX, &mut out); + small_raw_row(&[], 3, &mut out); + assert_eq!(out, [0; 12]); } /// Big-endian 16-bit words holding the 12-bit samples in their upper bits. diff --git a/docs/parity-checklist.md b/docs/parity-checklist.md index 99f17561e..05e04842e 100644 --- a/docs/parity-checklist.md +++ b/docs/parity-checklist.md @@ -80,7 +80,7 @@ differences and missing bindings are in [ui-parity.md](ui-parity.md#shortcuts). | LR-IMP-PROFILES | Import profiles & presets | P1 | ✅ | `cmd:file.importPresets`, `cmd:preset.import`, `cmd:profile.import`, `crates/engine/src/preset_import.rs`, `crates/engine/src/preset_luminar.rs` | presets: .lcpreset, XMP, classic .lrtemplate (local adjustment templates become mask effects, LR-MASK-EFFECTS), photos carrying edits ("DNG presets"), Luminar looks (.lmp, .mplumpack collections; sliders with a counterpart), .zip bundles, folders (folder → group), drag & drop (an `.xmp` dropped together with its photo is that photo's sidecar and is not imported as a preset, issue #936); masks carried over; unmapped settings reported (fields that only describe the preset or photo, e.g. `Cluster`, `SortName`, `SupportsAmount2`, the as-shot white, empty Point Color slots, are not); profiles: .cube 3D LUTs (one toast reports both halves; a LUT that fails is named with its reason); a preset that names a profile (`crs:Look`) applies the imported profile of that name, imported before or after it, and Lightroom's basic profiles map to ours (`crates/engine/src/profile_refs.rs`, issue #1001); Adobe profile formats deliberately unsupported (so `.xmp` creative profiles' colour tables aren't read) | | LR-IMP-LOCAL | Work on files in place | P0 | ✅ | `cmd:library.browse`, `cmd:photo.addToLibrary`, `cmd:library.import` (mode add), `cmd:local.addRoot`, `cmd:local.hide`, `cmd:local.restoreHidden`, `crates/engine/src/cmd/browse.rs`, `crates/ui-egui/src/panels/left.rs` (`local_section`), `crates/ui-egui/src/panels/grid.rs` (`folder_header`) | Local: browse Pictures / Desktop / Downloads / Home or any folder without adding it (breadcrumb, Include subfolders, Add N to My Photos); browsed photos stay out of All Photos, albums and counts (album commands skip them and the album menus say to Add to My Photos first, issue #684); folders picked with Browse Folder… (or Keep in Local / Add to Local on a folder row) stay listed across restarts, and browsing a folder inside a listed one highlights it inside that tree (opened down to it, siblings reachable) instead of adding a root; edits go to XMP sidecars; importing promotes them; right-click a top-level location → Remove from Local hides the shortcut only (nothing on disk or in the catalog changes), saved with the UI state, and “Show N hidden locations” (or Browse Folder… on it) brings it back, each on its own from the row's list when several are hidden, or all at once with Restore All (issue #2114); a folder is one location however its path is spelled (`/` or `\`, trailing separator, `.`/`..`, drive-letter case; `folder_key` in `crates/catalog/src/query.rs`); browsed photos nobody changed are forgotten once their folder has not been browsed for 30 days (Settings → Performance → Local folders, 0 = never; checked when the library opens, or `cmd:library.forgetLocal` with `dryRun`; files and sidecars stay, browsing again brings them back; see `crates/catalog/src/local.rs` for what counts as a change); browsing a folder again forgets at once the untouched records of its files that another app deleted or moved, so they no longer fail to load on every visit (issue #1392; changed ones stay, shown as missing); browsing a folder keeps the active photo when the folder shows it, else makes the folder's first photo active as it arrives, the same rule as albums and the other sources (`Session::keep_active_in_view`; issue #1447: before, a library photo stayed active, so Photo Grid marked nothing and Detail, the histogram and the info showed a photo the folder doesn't hold) | | LR-IMP-SIDECAR-SPLIT | Separate XMP sidecar variants | P2 | ⬜ | `cmd:library.xmpPreferences` | sidecar naming option exists (stem/full), no split sidecars | -| LR-IMP-FORMATS | Supported formats | P0 | 🟡 | `crates/codecs/src/lib.rs`, `crates/raw/src/lib.rs`, `crates/raw/src/jxl.rs` | JPEG, PNG, TIFF (1- to 64-bit integer, 16- to 64-bit float, incl. bilevel and CCITT fax), WebP, JXL, PSD, GIF, BMP (lossy wide-gamut JXL decodes to the right colours: jxl-oxide desaturated XYB rendered to P3/Rec. 2020, worked around in `crates/codecs/src/jxl.rs`); DNG (incl. lossy / Smart Preview DNG and DNG 1.7 JPEG XL tiles/strips: lossless ones decode bit-exactly on synthetic CFA and LinearRaw files, lossy ones are restored to the declared primaries and transfer curve (linear, sRGB, BT.709 or a power; PQ / HLG stay preview-only) without clipping or gamut mapping, checked on one real file with 108 lossy tiles and on 2 Lightroom Classic 15.1 lossy LinearRaw DNGs (ILCE-7CM2) whose tiles declare Rec. 2100 primaries with the sRGB curve, which were preview-only before, and any tile that fails to decode makes the file preview-only; DNG 1.7 row/column-interleaved rasters (`RowInterleaveFactor` / `ColumnInterleaveFactor`) are undone before the mosaic is read, so a file from Adobe's converter with a 2×2 interleave no longer decodes as four scaled-down copies in the wrong colours; a dimension the factor does not divide decodes with short trailing fields; verified on 4 real ILCE-6400 JPEG XL DNGs rendering bit-identical to their non-interleaved twins, factors above 2 rest on the plain reading of the tag; a single-chunk JPEG XL preview IFD is offered as the embedded preview; a DNG whose samples pile up at one value well below its stated `WhiteLevel`, as a camera app's 12-bit Bayer DNG that states 4095 and clips at 3567, has those samples raised to the white level on decode, so highlight reconstruction sees the clipped areas instead of white balance tinting them magenta, issue #548, `crates/raw/src/saturation.rs`), CR2 (colour-filter layout from the file's `CR2CFAPattern` tag, issue #85), ARW (pre-2017 bodies: white balance and black level from the encrypted `SR2SubIFD`, issue #148, its `WB_RGGBLevels` being the white balance the camera applied, issue #535; the DSLR-A900's packed 12-bit strip, two pixels per three bytes, read only when the strip is exactly 1.5 bytes per pixel, with its camera-JPEG window centred, checked on one CC0 file (A850 unmeasured); downsized Sony lossless YCbCr 4:2:0 / 4:2:2 tiles decoded to linear RGB, verified on private ILCE-7M4 3:2 & 4:3 examples including 16-bit full-resolution export; Sony DSC-R1 .SR2 decodes, its big-endian 16-bit words read in the order that fits the sample range, checked on the CC0 3221 sample; its crop and white balance live in the SR2SubIFD and are not read yet; ARW6 Compressed / Compressed (HQ) of the ILCE-7RM6 (`crates/raw/src/vendor/arw6.rs`, `crates/raw/src/llvc.rs`; 12-bit codes exact against a black-box oracle on 8 CC0 files, FF over the full frame, APS-C in the interior (LibRaw's own edge rows differ); output through our own companding curve, measured from CC0 lossless / ARW6 pairs; geometry checked against the camera JPEG, `docs/arw6-compression.md`; the ILCE-7M5 writes the same codec, unverified)), NEF (uncompressed, lossless and lossy compressed 12/14-bit, `crates/raw/src/vendor/nefc.rs`), RAF (uncompressed, lossless/lossy compressed Bayer and X-Trans; `crates/raw/src/vendor/rafc.rs`, full sensor verification on 13 bodies, `docs/raf-compression.md`), RW2 / Leica RWL / Panasonic RAW in every raw format (compressed 4 and 6, the prefix-coded strips of format 8 from the GH6 on, packed 2/5/7, the 16-bit words of the 2005–2007 bodies; black levels, in-camera aspect crops and mapped-out defect pixels; 178 CC0 files from 118 bodies checked, `crates/raw/src/vendor/rw2.rs`), PEF, ORF (uncompressed; colour-filter layout from the file's Exif `CFAPattern`; 12.8 bit/px 16-byte blocks of ten 12-bit samples + a zero pad byte, E-300 / E-330 / E-500 verified on CC0 files, E-M5 Mark II / PEN-F high-res files decode smooth but CFA and black unverified), Kodak DCS520C TIFF (a two-component 12-bit lossless JPEG strip, the two components the even and odd columns; the file's `GrayResponseCurve` table linearises the companded samples to 12 bits, black measured per CFA position, white balance from the `KodakIFD`; `RawFormat::KodakDcs`, `crates/raw/src/vendor/kodak.rs`, checked on the one CC0 sample against its IFD0 thumbnail), Hasselblad 3FR and FFF (a TIFF without a DNG version tag that describes its CFA IFD, levels, crop and white balance with DNG's tags; `RawFormat::CfaTiff`, read by `dng::decode_as`, RGGB when the file states no `CFAPattern`, checked against the camera preview on the CC0 H4D-40 FFF and CFV 3FR; an FFF has no colour matrix of its own and takes the camera's from the original 3FR header it embeds in tag `0xC51B`; neither carries a JPEG, so their uncompressed 8-bit RGB preview (1217 × 913 in the H4D-40 FFF, 218 × 218 in the CFV 3FR) is the embedded preview, handed on as a baseline TIFF, `crates/raw/src/vendor/hasselblad.rs`): uncompressed (X1D, X1D II, X2D, CFV 100C) and Hasselblad's lossless JPEG with scan selection value 8 (every FFF; H3D, H4D and CFV-50c 3FR), `ljpeg::decode_hasselblad`, its rule measured on 14 CC0 files with the ljpeg-explorer tool, Minolta / Konica Minolta MRW (the `\0MRM` block container: `PRD` sensor size, 12-bit packed or 16-bit-word storage and the RGGB / GBRG cell, `WBG` gains in cell order, the `TTW` TIFF for Exif and orientation, black 0 and white from the saturation plateau; `crates/raw/src/vendor/mrw.rs`, DiMAGE 7, 7Hi, A1, A2, A200 and Dynax / Maxxum 7D checked on CC0 files against their previews), Samsung SRW without compression (NX5, NX10, NX11 and the NX20-generation bodies NX20, NX200, NX210, NX1000 and NX1100 as 12-bit packed samples in either bit order, EX1 and WB2000 as 16-bit words; layout, camera-JPEG framing, levels and white balance from the maker note, `crates/raw/src/vendor/srw.rs`; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (EOS R6 Mark III `ColorData` version 66: as-shot white balance and black level from the file, white level from the data, `docs/cr3.md`) (the shot's aspect ratio from the maker note's `AspectInfo`); full sensor samples match the reference on M50/R100/R8/RP, incl. RP 1.6× crop mode (`crates/raw/tests/cr3_corpus.rs`, `docs/cr3.md`). EOS R5 Mark II C-RAW and RAW decode too (the QP map's first-symbol literal and 23-zero escape, odd-height Bayer planes): 4 CC0 files pinned, every QP map of 33,665 private C-RAW files decodes exactly, and full-frame images match the camera JPEG. Unsupported coding variants retain metadata and use the embedded JPEG when available; HEVC preview decoding remains unsupported. Missing: CR3 unverified CRX variants, compressed ORF, compressed Samsung SRW (NX1, NX30, NX300, NX500, NX2000, NX3000, NX3300, NX mini: preview only with the reason), Nikon High Efficiency NEF (HE / HE★ from the Z 8, Z 9, Z 6III and Z f: compression 34713 with a JPEG XS codestream and no `0x0096` table; no public specification, so preview only with the reason "Nikon High Efficiency NEF", issue #193; Lossless compressed NEFs from the same bodies decode), NEF "lossy after split" (preview only: imported with `preview_only` = the decoder's reason, rendered as a rendered JPEG, flagged by a grid badge and loupe/Edit/Info notices, `previewOnly` in `catalog.query`; Reload clears it once the file decodes, and the notices carry a Reload from Disk button; each flag is stamped with the app version that set it, and a library opened in another version rechecks its preview-only raws in the background, so a raw a newer release decodes is cleared without a manual Reload, issue #662, `library.recheckPreviewOnly`), TIFF-based raws whose raw data sits in a private block (Phase One / Leaf IIQ, Canon EOS-1D / 1Ds and the Kodak DCS Pro / DCS760C TIFFs (compression 65000): IFD0 is only a reduced RGB image next to a much larger declared picture) are recognised from that structure and import as `preview_only` with the reason, instead of opening as a thumbnail-sized ordinary image (`thumbnail_shell` in `crates/raw/src/lib.rs`), Recognised raws LightCraft cannot decode open as `preview_only` with any usable embedded JPEG, also Canon CRW and Sigma X3F (containers recognised by magic, preview found by a structural JPEG scan), Kodak KDC (IFD0 without `ImageWidth`), Leaf MOS and Epson ERF (scan; ones with no JPEG still fail with "without an embedded preview", AVIF decode (HEIC decodes only behind the non-default `heif` feature, which the release packages enable: `crates/heif`, heic-rs for the container and HEVC (bit-exact against libde265 on iPhone tiles) plus our own colour conversion, matching libheif within 1 code value on iPhone-style grids (VUI full range, Display P3 ICC, nclx, 10-bit, irot/imir/clap, gain map/depth ignored); 4:2:0/monochrome only, 4:2:2/4:4:4 Canon/Sony HIF refused; same policy as PhotoCraft), palette (indexed-colour) TIFF (refused by the `tiff` crate); folder discovery and file pickers include Sony SR2 and SRF, with the same extension list used by CLI/MCP: DSC-R1 SR2 decodes from sensor data; DSC-F828 SRF stays preview-only; transparency is flattened onto white, in linear light, where the working image is built (`to_working` in `crates/codecs/src/lib.rs`): renders, previews, exports and contact sheets no longer turn transparent areas black, issue #1212; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (the shot's aspect ratio from the maker note's `AspectInfo`); the Hasselblad Lunar, a Sony NEX-7 under Make HASSELBLAD, decodes as an ARW: a HASSELBLAD file with Sony's raw coding (compression 32767 or tag `0x7010`) goes to the ARW reader, and the body for its `Tag2010` layout comes from the maker note's `SonyModelID`, checked on the CC0 4051 file, issue #1275; an uncompressed MOS, whose IFD0 is the 16-bit mosaic with no Make tag, is recognised by Leaf's data block `0x8606` instead of opening as a greyscale image of its mosaic, issue #1275), and any decode failure of a recognised raw, not only an unsupported variant | +| LR-IMP-FORMATS | Supported formats | P0 | 🟡 | `crates/codecs/src/lib.rs`, `crates/raw/src/lib.rs`, `crates/raw/src/jxl.rs` | JPEG, PNG, TIFF (1- to 64-bit integer, 16- to 64-bit float, incl. bilevel and CCITT fax), WebP, JXL, PSD, GIF, BMP (lossy wide-gamut JXL decodes to the right colours: jxl-oxide desaturated XYB rendered to P3/Rec. 2020, worked around in `crates/codecs/src/jxl.rs`); DNG (incl. lossy / Smart Preview DNG and DNG 1.7 JPEG XL tiles/strips: lossless ones decode bit-exactly on synthetic CFA and LinearRaw files, lossy ones are restored to the declared primaries and transfer curve (linear, sRGB, BT.709 or a power; PQ / HLG stay preview-only) without clipping or gamut mapping, checked on one real file with 108 lossy tiles and on 2 Lightroom Classic 15.1 lossy LinearRaw DNGs (ILCE-7CM2) whose tiles declare Rec. 2100 primaries with the sRGB curve, which were preview-only before, and any tile that fails to decode makes the file preview-only; DNG 1.7 row/column-interleaved rasters (`RowInterleaveFactor` / `ColumnInterleaveFactor`) are undone before the mosaic is read, so a file from Adobe's converter with a 2×2 interleave no longer decodes as four scaled-down copies in the wrong colours; a dimension the factor does not divide decodes with short trailing fields; verified on 4 real ILCE-6400 JPEG XL DNGs rendering bit-identical to their non-interleaved twins, factors above 2 rest on the plain reading of the tag; a single-chunk JPEG XL preview IFD is offered as the embedded preview; a DNG whose samples pile up at one value well below its stated `WhiteLevel`, as a camera app's 12-bit Bayer DNG that states 4095 and clips at 3567, has those samples raised to the white level on decode, so highlight reconstruction sees the clipped areas instead of white balance tinting them magenta, issue #548, `crates/raw/src/saturation.rs`), CR2 (colour-filter layout from the file's `CR2CFAPattern` tag, issue #85), ARW (pre-2017 bodies: white balance and black level from the encrypted `SR2SubIFD`, issue #148, its `WB_RGGBLevels` being the white balance the camera applied, issue #535; the DSLR-A900's packed 12-bit strip, two pixels per three bytes, read only when the strip is exactly 1.5 bytes per pixel, with its camera-JPEG window centred, checked on one CC0 file (A850 unmeasured); downsized Sony lossless YCbCr 4:2:0 / 4:2:2 tiles decoded to linear RGB, verified on private ILCE-7M4 3:2 & 4:3 examples including 16-bit full-resolution export; Sony DSC-R1 .SR2 decodes, its big-endian 16-bit words read in the order that fits the sample range, checked on the CC0 3221 sample; its crop and white balance live in the SR2SubIFD and are not read yet; ARW6 Compressed / Compressed (HQ) of the ILCE-7RM6 (`crates/raw/src/vendor/arw6.rs`, `crates/raw/src/llvc.rs`; 12-bit codes exact against a black-box oracle on 8 CC0 files, FF over the full frame, APS-C in the interior (LibRaw's own edge rows differ); output through our own companding curve, measured from CC0 lossless / ARW6 pairs; geometry checked against the camera JPEG, `docs/arw6-compression.md`; the ILCE-7M5 writes the same codec, unverified)), NEF (uncompressed, lossless and lossy compressed 12/14-bit, `crates/raw/src/vendor/nefc.rs`), RAF (uncompressed, lossless/lossy compressed Bayer and X-Trans; `crates/raw/src/vendor/rafc.rs`, full sensor verification on 13 bodies, `docs/raf-compression.md`), RW2 / Leica RWL / Panasonic RAW in every raw format (compressed 4 and 6, the prefix-coded strips of format 8 from the GH6 on, packed 2/5/7, the 16-bit words of the 2005–2007 bodies; black levels, in-camera aspect crops and mapped-out defect pixels; 178 CC0 files from 118 bodies checked, `crates/raw/src/vendor/rw2.rs`), PEF, ORF (uncompressed; colour-filter layout from the file's Exif `CFAPattern`; 12.8 bit/px 16-byte blocks of ten 12-bit samples + a zero pad byte, E-300 / E-330 / E-500 verified on CC0 files, E-M5 Mark II / PEN-F high-res files decode smooth but CFA and black unverified), Kodak DCS520C TIFF (a two-component 12-bit lossless JPEG strip, the two components the even and odd columns; the file's `GrayResponseCurve` table linearises the companded samples to 12 bits, black measured per CFA position, white balance from the `KodakIFD`; `RawFormat::KodakDcs`, `crates/raw/src/vendor/kodak.rs`, checked on the one CC0 sample against its IFD0 thumbnail), Hasselblad 3FR and FFF (a TIFF without a DNG version tag that describes its CFA IFD, levels, crop and white balance with DNG's tags; `RawFormat::CfaTiff`, read by `dng::decode_as`, RGGB when the file states no `CFAPattern`, checked against the camera preview on the CC0 H4D-40 FFF and CFV 3FR; an FFF has no colour matrix of its own and takes the camera's from the original 3FR header it embeds in tag `0xC51B`; neither carries a JPEG, so their uncompressed 8-bit RGB preview (1217 × 913 in the H4D-40 FFF, 218 × 218 in the CFV 3FR) is the embedded preview, handed on as a baseline TIFF, `crates/raw/src/vendor/hasselblad.rs`): uncompressed (X1D, X1D II, X2D, CFV 100C) and Hasselblad's lossless JPEG with scan selection value 8 (every FFF; H3D, H4D and CFV-50c 3FR), `ljpeg::decode_hasselblad`, its rule measured on 14 CC0 files with the ljpeg-explorer tool, Minolta / Konica Minolta MRW (the `\0MRM` block container: `PRD` sensor size, 12-bit packed or 16-bit-word storage and the RGGB / GBRG cell, `WBG` gains in cell order, the `TTW` TIFF for Exif and orientation, black 0 and white from the saturation plateau; `crates/raw/src/vendor/mrw.rs`, DiMAGE 7, 7Hi, A1, A2, A200 and Dynax / Maxxum 7D checked on CC0 files against their previews), Samsung SRW without compression (NX5, NX10, NX11 and the NX20-generation bodies NX20, NX200, NX210, NX1000 and NX1100 as 12-bit packed samples in either bit order, EX1 and WB2000 as 16-bit words; layout, camera-JPEG framing, levels and white balance from the maker note, `crates/raw/src/vendor/srw.rs`; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (EOS R6 Mark III `ColorData` version 66: as-shot white balance and black level from the file, white level from the data, `docs/cr3.md`) (the shot's aspect ratio from the maker note's `AspectInfo`); full sensor samples match the reference on M50/R100/R8/RP, incl. RP 1.6× crop mode (`crates/raw/tests/cr3_corpus.rs`, `docs/cr3.md`). EOS R5 Mark II C-RAW and RAW decode too (the QP map's first-symbol literal and 23-zero escape, odd-height Bayer planes): 4 CC0 files pinned, every QP map of 33,665 private C-RAW files decodes exactly, and full-frame images match the camera JPEG. Unsupported coding variants retain metadata and use the embedded JPEG when available; HEVC preview decoding remains unsupported. Missing: CR3 unverified CRX variants, compressed ORF, compressed Samsung SRW (NX1, NX30, NX300, NX500, NX2000, NX3000, NX3300, NX mini: preview only with the reason), Nikon High Efficiency NEF (HE / HE★ from the Z 8, Z 9, Z 6III and Z f: compression 34713 with a JPEG XS codestream and no `0x0096` table; no public specification, so preview only with the reason "Nikon High Efficiency NEF", issue #193; Lossless compressed NEFs from the same bodies decode), NEF "lossy after split" (preview only: imported with `preview_only` = the decoder's reason, rendered as a rendered JPEG, flagged by a grid badge and loupe/Edit/Info notices, `previewOnly` in `catalog.query`; Reload clears it once the file decodes, and the notices carry a Reload from Disk button; each flag is stamped with the app version that set it, and a library opened in another version rechecks its preview-only raws in the background, so a raw a newer release decodes is cleared without a manual Reload, issue #662, `library.recheckPreviewOnly`), TIFF-based raws whose raw data sits in a private block (Phase One / Leaf IIQ, Canon EOS-1D / 1Ds and the Kodak DCS Pro / DCS760C TIFFs (compression 65000): IFD0 is only a reduced RGB image next to a much larger declared picture) are recognised from that structure and import as `preview_only` with the reason, instead of opening as a thumbnail-sized ordinary image (`thumbnail_shell` in `crates/raw/src/lib.rs`), Recognised raws LightCraft cannot decode open as `preview_only` with any usable embedded JPEG, also Canon CRW and Sigma X3F (containers recognised by magic, preview found by a structural JPEG scan), Kodak KDC (IFD0 without `ImageWidth`), Leaf MOS and Epson ERF (scan; ones with no JPEG still fail with "without an embedded preview", AVIF decode (HEIC decodes only behind the non-default `heif` feature, which the release packages enable: `crates/heif`, heic-rs for the container and HEVC (bit-exact against libde265 on iPhone tiles) plus our own colour conversion, matching libheif within 1 code value on iPhone-style grids (VUI full range, Display P3 ICC, nclx, 10-bit, irot/imir/clap, gain map/depth ignored); 4:2:0/monochrome only, 4:2:2/4:4:4 Canon/Sony HIF refused; same policy as PhotoCraft), palette (indexed-colour) TIFF (refused by the `tiff` crate); folder discovery and file pickers include Sony SR2 and SRF, with the same extension list used by CLI/MCP: DSC-R1 SR2 decodes from sensor data; DSC-F828 SRF stays preview-only; transparency is flattened onto white, in linear light, where the working image is built (`to_working` in `crates/codecs/src/lib.rs`): renders, previews, exports and contact sheets no longer turn transparent areas black, issue #1212; median ΔE vs the camera JPEG 2.2–7.6 on 11 of the 12 files from 10 bodies checked, 10.7 (5.7 registered) on the backlit WB2000 sample). 12-bit NEF black level: maker note `0x003d` is in 14-bit units (D750, D780, D850, D7500, Z 50 checked). Lossy type 2 NEF curves of version `0x44 0x40` (D780, D6, Z 5, Z 6, Z 7, Z 7_2) span a quarter of the sample range, read from the table's own point spacing. Import probes (`probe_info`) of compressed NEFs decode only the first 128 rows, the ones the masked-trailing-column test reads in both the probe and the full decode (the D5100 and D7000 write 8 masked columns at 0 with no maker-note tag for them, compressed and uncompressed alike), instead of the whole Huffman stream: ~3 ms instead of the full decode time per file (386 ms on a 24 MP D750 file), issue #708. CR3 lossless CRX Bayer and version 0x100/0x200 C-RAW decodes to sensor pixels with timed white balance, black/white levels and file crop (the shot's aspect ratio from the maker note's `AspectInfo`); the Hasselblad Lunar, a Sony NEX-7 under Make HASSELBLAD, decodes as an ARW: a HASSELBLAD file with Sony's raw coding (compression 32767 or tag `0x7010`) goes to the ARW reader, and the body for its `Tag2010` layout comes from the maker note's `SonyModelID`, checked on the CC0 4051 file, issue #1275; an uncompressed MOS, whose IFD0 is the 16-bit mosaic with no Make tag, is recognised by Leaf's data block `0x8606` instead of opening as a greyscale image of its mosaic, issue #1275), and any decode failure of a recognised raw, not only an unsupported variant Nikon 12-bit small RAW (D810 / D4S): packed Y0/Y1/Cb/Cr rows decode to linear RGB; header probes retain geometry without decoding pixels, and truncated strips are refused. Chroma gains are approximate. | | LR-IMP-CAMERA-COVERAGE | Camera coverage, verified per model | P0 | 🟡 | `crates/raw/tests/corpus.rs`, `crates/raw/tests/coverage_sweep_corpus.rs`, `docs/raw/evidence.tsv`, `docs/raw/coverage-sweep.tsv`, `xtask/src/main.rs` | a supported container is not the same as every camera that writes it decoding correctly: ~55 CC0 corpus files plus 6 exact-sensor CR3 cases and 4 pinned EOS R5 Mark II files (plus ~60 NEFs checked by hand and 178 Panasonic / Leica RW2, RWL and RAW files from 118 bodies, checked against each file's own JPEG) against the >1,000 models Lightroom lists; per-model differences still surface (e.g. the CR2 colour-filter layout differed by model until it was read from the file's own tag, issue #85, checked on 35 CR2 bodies; CR2 black levels were read from border columns light already reaches, left of `SensorInfo`'s border, so CR2s rendered dark with crushed shadows (EOS 6D: 2591 instead of 2047), now measured from the masked columns only, checked on 8 corpus bodies; pre-2017 Sony ARWs opened green until their scrambled white balance / black level were read, issue #148, checked on 16 ARWs from 15 Sony bodies; their white balance now comes from the encrypted `SR2SubIFD`'s `WB_RGGBLevels`, the gains the camera applied, which 14 bodies (DSLR-A450 … A700, NEX-3/5/C3, SLT-A33/A35/A55, ILCE-6001, UMC-R10C) had no other source for and which the maker-note estimate read before missed by up to 100 % on preset shots, issue #535, checked against ExifTool on 100 decoded ARWs from 87 Sony bodies; the encrypted SR2 black level is now read from its directory entry (the DSLR-A450/A500/A550/A700 read 354–975 instead of 512), checked on 126 ARWs from 97 Sony bodies, and downsized lossless M/S ARWs use their measured black level 1024 instead of 512, checked on 12 files from 4 bodies, issue #535, and on a fifth, the ILCE-7CM2 (issue #697: 0.5.0 rendered its lossless M file with that 512 pedestal, the darkest half of a dusk scene +11 L* and blue, the lamplight white; its darkest 0.1 % per channel sits at 1017/1020/1024, and with 1024 the render is within +3 L* of the camera JPEG; the body's compressed and uncompressed "M-size" files are Bayer at 4736×3132 with black 512, two public ones in the corpus); pre-2017 Sony bodies shot in the camera's 16:9 mode (ILCE-7SM2, DSLR-A580) now get the 16:9 crop of their camera JPEG instead of the whole 3:2 frame with padding columns, issue #535; Canon PowerShot and EOS M CR2s whose `ColorData` is stored as bytes opened green until the bytes were read as 16-bit words, 25 files from 25 bodies checked; private Z 8 crop verified; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone); the D7100, whose data holds picture beyond the camera's frame, develops at Lightroom's frame (the camera JPEG's size) in full frame and 1.3x crop, so Lightroom crops line up (#1248).; CR2 white levels came from masked rows holding samples at 16383, so on the EOS 50D, 60D, 450D (Rebel XSi), 500D (Rebel T1i), 550D (Rebel T2i), 1200D (Rebel T5) and 100D (Rebel SL1) clipped highlights sat at 81–98% of the range and were not treated as clipped, now taken from the active area only, issue #1272). Compressed RAF sensor arrays verified on 13 Fujifilm bodies (`docs/raf-compression.md`). ILCE-7RM6 ARW6 12-bit codes verified on 8 CC0 files (FF and APS-C, both compression modes). Sony ILCE-7CR (61 MP): lossless compressed L and M and compressed ARW2 samples of one scene in the corpus (black level, default crop, as-shot gains, lossless vs compressed mosaic agreement, fitted camera look), and all nine public codings (also uncompressed, small and APS-C crop) decode and fit. Grow the CC0 corpus per model and test each sample decodes with plausible colour. Nikon CropArea and untagged-preview colour-space regression tests; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone). Pentax PEFs without area tags (KP, KF, K-3 Mark III, K-70, K-1, K-1 Mark II, K-S1, K-S2, 645Z) no longer keep their masked border: black, empty and saturated lines are trimmed against the maker-note BlackPoint, issue #1271, measured on 38 CC0 PEFs from 30 bodies.; Canon PowerShot and EOS M CR2s whose `ColorData` is stored as bytes opened green until the bytes were read as 16-bit words, 25 files from 25 bodies checked). Compressed RAF sensor arrays verified on 13 Fujifilm bodies (`docs/raf-compression.md`). ILCE-7RM6 ARW6 12-bit codes verified on 8 CC0 files (FF and APS-C, both compression modes). Sony ILCE-7CR (61 MP): lossless compressed L and M and compressed ARW2 samples of one scene in the corpus (black level, default crop, as-shot gains, lossless vs compressed mosaic agreement, fitted camera look), and all nine public codings (also uncompressed, small and APS-C crop) decode and fit. Grow the CC0 corpus per model and test each sample decodes with plausible colour. Nikon CropArea and untagged-preview colour-space regression tests; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone). The Canon PowerShot G9, which writes no `ColorData`, takes its as-shot white balance from the WBInfo row (`0x0029`) of the preset ShotInfo names, issue #1273, checked on 1 CC0 file against neutral areas of the camera JPEG (within 0.1 %).; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone). The Olympus E-10 (no ImageProcessing directory) takes its as-shot gains and its black level (`0x1012` in `0x102c` ValidBits units: 128 at 12 bits) from the main maker note, issue #1273: its render against the camera thumbnail goes from ΔE76 18.5 with a rejected fit to 11.5 with the fit accepted (measured by AlexChambers).; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone), and the Nikon D90 likewise on 10 of 550 NEFs (42 filler columns on the right that developed as a pink band; green clips below red and blue).; the Nikon D4, which records no CropArea, gets its image area and white level measured on 148 NEFs against the camera JPEG (optical-black stripes and magenta clipped highlights gone). Public raw.pixls.us coverage sweep (#1327): 30 more models verified on 40 CC0 files, with SHA-256 and FNV-1a sensor hashes pinned (`crates/raw/tests/coverage_sweep_corpus.rs`, `docs/raw/coverage-sweep.tsv`; `docs/raw/coverage.py`: 515 → 545 verified rows). Render/reference luminance correlation is 0.6801 to 0.9998; eleven candidates excluded for identity, provenance or missing/mismatched reference images. Nikon D6 / Z 6 / Z 7 uncompressed and Z 8 HE variants remain preview-only. Own-matrix DNG tone differs from the camera JPEG (#1277); sensor verification is not colour calibration. | | LR-IMP-PREVIEW-READ | Preview reads the header, not the raw | P0 | ✅ | `crates/raw/src/preview.rs` (`bounded_preview`, `embedded_preview_from_range`, `embedded_preview_covering`), `crates/engine/src/files.rs` (`preview_window`), `docs/raw-preview-reads.md`, `crates/engine/src/files.rs` (`preview_window`, `planned_preview`), `crates/raw/src/sparse.rs` (`preview_plan`), `crates/raw/src/dng.rs` (`decode_reduced`) | a grid thumbnail and a loupe preview of an unedited raw show the camera's embedded JPEG, which sits near the start of the file (a 24 MP Fuji RAF keeps its 5.6 MB JPEG in a 56 MB file), so the preview loader reads the header and that JPEG instead of the whole file: 56.5 MB → 5.9 MB and ~10 s → 0.96 s measured on one real RAF over a GVFS/SMB Wi-Fi share (byte-identical preview pixels; `LIGHTCRAFT_PROFILE=1` reports the bytes); the RAF pointer is read from its fixed header fields, a CR3's boxes and a TIFF raw whose preview tag sits past the prefix are read through `lightcraft_raw::sparse::preview_plan`, which names the ranges `embedded_preview` reads and nothing else; a cached render as stand-in, an edited photo and a raw without an embedded JPEG still render; the formats it cannot describe (CRW/MRW/X3F are found by scanning, NEF/ORF/PEF probe from samples) keep the whole-file path, and a lying pointer, a short read or a file that changes underneath us falls back to it rather than losing the preview. An unedited raw's **grid thumbnail is that camera JPEG itself**, so no sensor decode is scheduled behind it (`Session::embedded_thumb_is_final`, `grid::skips_the_real_render`): drawing a 512 px thumbnail used to decode the whole raw — 45 s a photo at 1.2 MB/s, 8.3 GB for a 149-raw folder — and the queue it built delayed the render the user was waiting for. Stand-ins and grid thumbnails decode the smallest embedded JPEG that covers the requested size and is a copy of the largest (aspect ratio within 1 %, same component count), not always the largest, on the whole-file and the plan route alike: an A7R VI's 1616 × 1080 JPEG (0.3 MB) instead of its 9984 × 6656 one (5.6 MB), and mid-sized NEF / RW2 JPEGs; a DNG that keeps reduced-resolution copies of its LinearRaw image (Lightroom HDR/panorama merges) develops a thumbnail or preview from the smallest copy that covers it (512 px of a 23836 × 7078 pano: 38 s → 1.1 s) | | LR-IMP-CULL-AT-IMPORT | Culling analysis at import | P2 | 🟡 | `cmd:photo.analyze` | run Assisted Culling on the imported photos (they're selected after an import); not automatic |