Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog, and this project adheres to Semantic Versioning.

0.2.0 - 2026-05-02

:srgb gamma now resolves to {2.4, 12.92} (the dcraw / libraw sRGB convention). Previously {2.222, 12.92}, which produced incorrect pixel values for every caller using the default.

Breaking (source builds): Bumped rustler to ~> 0.37 on both the Elixir and Rust sides (was ~> 0.33). Consumers compiling the NIF from source need a compatible Rust toolchain; no API changes for Elixir callers.
decode/2 no longer makes an intermediate Vec<u8> copy of the libraw pixel buffer. The data is copied once, directly into the OwnedBinary returned to the BEAM. Saves ~72 MB of allocation+copy per 24-megapixel 8-bit decode.

Unused LibRawError::UnexpectedImageType variant and dead helpers in error.rs (result_to_term/2, From<LibRawError> for rustler::Error).

Added mix format config and ran the formatter.
Added an integration test (mix test.smoke) that exercises a real RAW file end-to-end. Excluded from mix test by default; drop any RAW at test/fixtures/sample.raw to run it.

Initial release.
LibRaw.decode/2 — full libraw pipeline (open → unpack → dcraw_process → in-memory bitmap), with options for white balance, auto-bright, output bits-per-sample, and gamma curve.
LibRaw.metadata/1 — EXIF metadata (make, model, captured_at, ISO, shutter, aperture, orientation) without the full decode pipeline.
Both NIFs scheduled on Dirty CPU schedulers.
Thin wrapper.c shim avoids bindgen / struct-offset breakage across libraw 0.20 / 0.21 / 0.22.