v0.1.0

Added

• Ssimulacra2.compare/5 and compare!/5 — compute the SSIMULACRA2 score
  between two packed-binary images. Scores are on the native 0–100 scale.
• Ssimulacra2.Reference — new/4, new!/4, compare/3, compare!/3 for
  reusing one prepared reference across many candidates (~2× faster per compare
  in a quality-search loop).
• Input formats selectable via the :format option: :rgb888 (default),
  :rgb16, :linear_rgb, :gray8, :linear_gray.
• Cooperative cancellation: Ssimulacra2.CancelRef.new/0 and
  Ssimulacra2.cancel/1. The metric runs on a dirty scheduler and polls the
  cancel ref at strip boundaries, freeing the CPU promptly. A cancel ref is
  single-use.
• Wall-clock timeouts via the :timeout option, returning {:error, :timeout}.
• Optional Vix integration (Ssimulacra2.Vix.compare/2), available when :vix
  is a dependency.
• Precompiled NIFs via rustler_precompiled for aarch64/x86_64 macOS,
  gnu/musl Linux, and x86_64 Windows, across NIF versions 2.15–2.17, so
  the Rust toolchain is not required on covered targets.

Notes

• fast-ssim2 is pinned to a git revision because the cooperative-cancellation
  API (*_with_stop) has not yet landed in a crates.io release. This will move
  to a versioned dependency once available.
• Scores are "SSIMULACRA2 as computed by fast-ssim2" and have not been
  bit-exactly validated against the canonical Cloudinary/libjxl reference.