feat: no_std / embedded support for core, imgproc, calib3d & video (#82) - #90
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- add #![cfg_attr(not(feature = "std"), no_std)] and extern crate alloc - std-gate the not-yet-converted modules (calib3d, features, features2d, imgproc, video) and their prelude re-exports - switch std:: paths to core::/alloc:: throughout src/core - PureCvError now implements core::error::Error (MSRV 1.88) - float methods resolve through num_traits::Float (libm) in no_std builds - std-gate get_tick_count/get_tick_frequency (no bare-metal clock) and the thread-local RNG API; replace a debug eprintln! with log::warn! Verified on thumbv7em-none-eabihf and ESP32-S3 (Xtensa). Refs #83 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
crates/no-std-smoke consumes the purecv public API from a #![no_std] crate; building it for a bare-metal target proves downstream no_std usability. Excluded from the workspace as its own root. Refs #83 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Builds and lints with --no-default-features on the host, then builds purecv and the smoke-test consumer for thumbv7em-none-eabihf. Refs #83 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
default-features = false previously only dropped rayon; now that std gates the non-core modules, the wasm wrapper must opt back into it. Refs #83 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
# Conflicts: # src/core/arithm.rs # src/core/dynamic.rs # src/core/matrix.rs # src/core/metrics.rs # src/core/rng.rs # src/core/structural.rs
feat(core): no_std support for the core module (Phase 1)
Un-gates `imgproc` (and its prelude re-exports) for no_std builds; the module now compiles with only core + alloc. Refs #84 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Converts std:: paths to their core:: equivalents and adds alloc imports (vec/Vec/format/ToString) plus num_traits::Float where concrete f32/f64 math is used, so scalar fallbacks build without std. No behavior change. Refs #84 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Phase 3 (#85) concluded the exploration with "port both": the audit found no hard blockers — calib3d RANSAC uses its own self-contained LCG PRNG (not the std-gated thread-local RNG), and neither module uses HashMap/Instant/ threads. Un-gates `video` and `calib3d` (and their prelude re-exports). Refs #85 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Mechanical std::->core:: conversion, alloc imports (vec/Vec/format/ToString), and num_traits::Float where concrete f32/f64 math is used. optical_flow's SIMD-only vec! import is gated behind the simd feature. No behavior change. Refs #85 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Adds rodrigues (calib3d) and build_optical_flow_pyramid (video) to the no_std smoke crate, extends the CI job name, and documents the per-module no_std support matrix in the README. Refs #85 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- broaden the intro/philosophy to cover all modules and no_std targets - add an "Embedded-ready" philosophy bullet and a no_std quickstart snippet - note MSRV 1.88; fix version examples (0.5 -> 0.6) - core::f64::consts (available under no_std), updated test counts (308/40) - roadmap: mark embedded/no_std support done Refs #82 Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Promotes the completed
no_std/ embedded work from thefeat/no_stdintegration branch intodev. This is the umbrella #82 effort, delivered in three phases (each already reviewed and merged intofeat/no_std):core([no_std] Phase 1 — makepurecv-corecompile underno_std + alloc#83):#![cfg_attr(not(feature = "std"), no_std)]+alloc; libm-backed float math vianum-traits; std-only APIs (thread-local RNG, tick counters) feature-gated; MSRV 1.88. Also brings in the OpenCV-style logging facility (feat(core): add OpenCV-style logging facade (cv::utils::loggingequivalent) #80) with the$crate::__format!fix socv_bail!/cv_err!work underno_std.imgproc([no_std] Phase 2 —purecv-imgprocunderno_std(parallel & simd disabled) #84): scalar fallbacks underno_std;hough_lines_pgated behindstd(thread-local RNG); everything else portable.video+calib3d([no_std] Phase 3 (exploratory) — evaluate video/calib3d on embedded targets #85): both fullyno_std— calib3d RANSAC uses its own self-contained LCG PRNG, so no std-only blockers.What's included
core,imgproc,calib3d, andvideoall compile with--no-default-features(onlycore+alloc).features2dremainsstd-gated.parallel,simd,fft, andndarrayimplystd; disabling default features gives the scalar, single-threaded paths.crates/no-std-smokeconsumer + a CI job building the library and the smoke crate forthumbv7em-none-eabihf.no_std/ embedded support" section with a per-module support matrix and quickstart, MSRV note, version fixes (0.5 → 0.6), and roadmap update.Verification
--no-default-featuresbuilds clean on host andthumbv7em-none-eabihf.webarkit/purecv-esp32-examples(matrix arithmetic, Gaussian blur, andsolve_pnppose estimation).Closes #82
Closes #83
Closes #84
Closes #85
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