ouestcharlie-imageproc
Image processing coprocessor for OuEstCharlie — a Rust CLI (image-proc) bundled with a Python subprocess wrapper.
Handles all pixel-level operations: decoding, EXIF orientation, resize, fit, and encoding to AVIF or JPEG. Used by ouestcharlie-py-toolkit for thumbnail grid assembly and on-demand preview generation.
What's in this package
image-proc— Rust CLI that reads JSON requests from stdin and writes JSON responses to stdout (newline-delimited, persistent coprocessor model).ouestcharlie_imageproc.image_proc— Python subprocess wrappers:OneTimeImageProc(fresh process per request) andPersistentImageProc(long-lived process with asyncio lock).
Supported formats
| Format | Notes |
|---|---|
| JPEG, PNG, WebP, TIFF | Default, pure Rust, all platforms |
| RAW (CR2, NEF, ARW, DNG, RAF, ORF, RW2, PEF) | Enable with IMAGE_PROC_FEATURE_RAW=1 |
| HEIC/HEIF | Enable with IMAGE_PROC_FEATURE_HEIC=1 — bundled into published wheels by default; requires libheif at build time only, none at runtime (its shared library is vendored into the wheel) |
Building
Requires Rust stable, nasm, and (for HEIC) libheif:
# macOS
brew install nasm inih libheif
# Linux
sudo apt-get install nasm libheif-dev
# Windows
choco install nasm
# libheif via vcpkg — see .github/workflows/_build.yml for the bootstrap steps
# Install as editable (development)
pip install -e . --no-build-isolation
# Build release wheel
IMAGE_PROC_FEATURE_RAW=1 IMAGE_PROC_FEATURE_HEIC=1 hatch build --target wheel
Published wheels set both IMAGE_PROC_FEATURE_RAW and IMAGE_PROC_FEATURE_HEIC via
CI — a bare pip install -e . or hatch build without the env vars excludes both,
same as cargo build without --features.
Running tests
# Unit tests (no binary required)
.venv/bin/python -m pytest tests/ -v
# Integration tests (require compiled binary)
.venv/bin/python -m pytest tests_integration/ -v
# Rust tests
cd image-proc && cargo test
Design
See imageproc_LLD.md for the protocol specification, command reference, and build details.
1 maintainer
Metadata
1 maintainer
Release files for ouestcharlie-imageproc 3.0.1
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
|---|---|---|---|---|
| ouestcharlie_imageproc-3.0.1.tar.gz | 2.3 MB | With provenance | Details for ouestcharlie_imageproc-3.0.1.tar.gz |
Built distributions (wheels)
| File | Interpreter | ABI | Platform | Actions Reset |
|---|---|---|---|---|
| ouestcharlie_imageproc-3.0.1-py3-none-win_amd64.whl | Python 3 | none | Windows x86-64 | Details for ouestcharlie_imageproc-3.0.1-py3-none-win_amd64.whl |
| ouestcharlie_imageproc-3.0.1-py3-none-manylinux_2_34_x86_64.whl | Python 3 | none | Linux glibc 2.34+ x86-64 | Details for ouestcharlie_imageproc-3.0.1-py3-none-manylinux_2_34_x86_64.whl |
| ouestcharlie_imageproc-3.0.1-py3-none-macosx_15_0_arm64.whl | Python 3 | none | macOS 15.0+ ARM64 | Details for ouestcharlie_imageproc-3.0.1-py3-none-macosx_15_0_arm64.whl |
Total release size: 27.8 MB
Release files / ouestcharlie_imageproc-3.0.1.tar.gz
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