ColorData::baseline_sharpness holds the file's BaselineSharpness (raw IFD
or IFD 0; zero, negative, non-finite or above 16 is ignored) and the DNG
writer writes it back, so a conversion or smart preview keeps it. Merge
outputs leave it unset. Rendering doesn't use it yet.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Parse ProfileGainTableMap (DNG 1.6) and ProfileGainTableMap2 (DNG 1.7):
both versions, DNG 1.7 precedence (version 2 in IFD 0, then the raw IFD;
version 1 in the raw IFD, then IFD 0), u8/u16/f16/f32 gains, gamma.
Malformed tags (wrong size, zero or huge grids, non-finite or negative
gains, bad spacing or gamma) are ignored, never allocated for.
Byte order: the specification gives this tag no byte order of its own,
unlike opcode lists, so the payload is read in the file's byte order with
a big-endian fallback; a wrong-order read can't pass the size checks.
The module docs quote the DNG 1.6 "Byte Order" rule.
The map is kept in ColorData, written back by the DNG writer (version 1,
or version 2 when its gamma isn't 1) and dropped from merge outputs, whose
geometry no longer matches the capture's active area. It is not applied
to the render: Lightroom Classic renders Apple ProRAW without it.
Supersedes the parser of #273.
The CC0 iPhone 12 Pro ProRAW from raw.pixls.us joins the corpus.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
NEF (and other vendor raws without a colour matrix) carry their as-shot
white balance as vendor multipliers, not as a DNG AsShotNeutral. The DNG
writer only copied AsShotNeutral/AsShotWhiteXY, so Convert to DNG and
Copy as DNG produced files with no white balance at all, which develop
dark and green. Write the reciprocal of the vendor multipliers as
AsShotNeutral when the source has no DNG white of its own.
Lightroom-converted DNGs carry their camera profile's ProfileHueSatMapData1/2
and ProfileLookTableData (and sometimes ProfileToneCurve). We used only the
colour matrices, so such DNGs rendered flat and muted.
- raw: new `profile` module reads the tags (DNG spec ch. 6: value-major,
hue-middle, saturation-minor tables, wrap-around hue, tri-linear lookups,
sRGB value encoding) from the raw IFD or IFD 0; malformed tags are ignored.
- engine: the raw loader applies the hue/sat map (interpolated by the same
illuminant weight as the matrices) before BaselineExposure and the look
table after it, in linear ProPhoto; a ProfileToneCurve becomes the source's
camera tone. Without one the standard base tone is kept.
- dngwrite keeps the look with the data (conversions, smart previews, merges).
- Render cache version 7.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
- ljpeg: a scan naming an undefined Huffman table is an error, not an expect.
- ARW2/RW2 block reads use get() + try_from instead of slice + expect.
- Vendor fallback CFAs use Cfa::bayer_static (literal names, tested)
instead of Cfa::bayer(..).expect("static").
- dngwrite matches (data, compression) instead of a let-else unreachable!.
- lightcraft-raw and lightcraft-tiff now #![deny] unwrap/expect/panic/
unimplemented/todo/unreachable; clippy.toml (same as the steering PR)
keeps them allowed in tests.
- tests/vendor_robust.rs: synthetic NEF, ARW, PEF, SRW, ORF, RW2, CR2 and
RAF files, truncated at every length and randomly mutated, must decode
to an error, never panic (no new crash found).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
