# step: exact tone mapping · wai-rs and tonemap_verify.py
# order: 610
# features: exact_tonemap
# paths: wai/extensions/exact-tonemap.md
# independent: tonemap live python3 -I live-conformance/tonemap_verify.py live-conformance/tonemap
#
# wai.media.tonemap, wai.meta.gainmap and wai.meta.st2094_50 (extensions/exact-tonemap.md):
# the reference module's unit tests (the fixed-point log2 and exp2 at known points, the
# table of K against its rule, the sRGB table, tan through its series, PCHIP slopes of a
# line, rounding of halves for both signs) and the PNG reader's, then tests/exact_tonemap.rs
# (the committed corpus regenerates byte for byte, no other file is there, every case and
# envelope gets its stated outcome, §9 lists exactly the reference's codes, §6 states the
# corpus's measurement against binary64, and frames.rgb8 is the int_video clip's decode
# whose digests its sidecar publishes); and, in the step of every independent verifier
# above, the corpus's second implementation,
# tonemap_verify.py, written from the extension's text and sharing no code with wai-rs,
# which computes both derivations in integer arithmetic of its own, reads PNG, envelopes
# (with staged_verify.py) and both companions itself, recomputes §6's measurement, verifies
# every record with WAI's strict Ed25519 rule and BLAKE3 from claim-conformance, requires
# every mutated copy of the corpus to fail, and drops each of its own checks in turn and
# requires the corpus to catch the weakened verifier; standard library only, run isolated
# (-I).
#
# The paths this step brings to the workflow's trigger, and why:
# wai/extensions/exact-tonemap.md: tests/exact_tonemap.rs requires this extension's §9 to list the
#   codes the reference reports and its §6 to state the corpus's measurement, tonemap_verify.py
#   reads §3.3's table, §5.4's constant and §9, and the registry's wire identifiers test reads its
#   sections.
set -euo pipefail
(cd wai-rs && cargo test --no-default-features --features "$WAI_FEATURES" --lib -- exact_tonemap:: png_still::)
(cd wai-rs && cargo test --no-default-features --features "$WAI_FEATURES" --test exact_tonemap)