lightcraft

mirror of https://github.com/storytold/lightcraft.git synced 2026-10-25 10:37:11 -06:00

Files

T

Atmik Shetty 068caf361c LRC-PRINT-JOB: print colour transform (printer / paper profiles, intent, black point compensation, print adjustment)

codecs::print converts a composed print page (16-bit RGB in the Rec2020 output encoding) to the
samples a print-ready file carries:

- PrintTarget::Profile(icc): a printer / paper profile, RGB, CMYK or grey, matrix or LUT based,
  converted with moxcms; PrintTarget::Managed(space): the printer manages colour and the page goes
  in sRGB or Adobe RGB with that profile embedded.
- Perceptual or relative colorimetric (ProofIntent, as soft proofing).
- Black point compensation for relative colorimetric: the device's darkest is measured by a round
  trip of black through the profile and linear values are scaled to land the page's black there
  (Y' = Y(1 - Yb) + Yb, the published mapping for a neutral destination black), so shadows below
  the ink's black no longer clip to one value. Perceptual tables keep their own black mapping.
- Print adjustment brightness / contrast (-100..100) on the sRGB-encoded values, black and white
  held, monotonic at every setting.

Everything before the profile is per channel and folds into one 16-bit table; pages convert in
bounded batches (parallel with the `parallel` feature). Hostile profiles, half pixels and NaN
settings are errors or neutral, never panics. Not wired to the print job yet.

2026-10-12 15:15:57 +05:30

convert.rs

CI: clean under clippy 1.99 (as_chunks for constant chunk sizes, ? in export resize parsing)

2026-10-04 11:53:43 -04:00

display.rs

LR-PREF-DISPLAY: monitor ICC profiles (display colour management)

2026-10-09 11:21:09 -07:00

encode.rs

Merge PR #780

2026-10-11 12:40:55 +00:00

exif.rs

M1.1: lightcraft-codecs decode/encode, ICC, sniffing