Python `pymtpng`

Python bindings for the MTPNG library, a parallelized PNG encoder in Rust by Brion Vibber.

Build prerequisites

Python 3.12+
Rust toolchain (cargo)
CMake >=3.24
Ninja
C++20 compiler

Build with dependencies from lockfile

uv sync --no-install-project
uv build --wheel --no-build-isolation

Develop with auto rebuild

uv sync
uv run ruff check .
uv run pytest

Usage

import pymtpng

# Encode numpy uint8 array to PNG
with open("image_uint8.png", "wb") as fh:
    pymtpng.encode_png(image_uint8, fh)

# Encode numpy uint16 array to PNG
with open("image_uint16.png", "wb") as fh:
    pymtpng.encode_u16_png(image_uint16, fh)

# Customize encoding options
pymtpng.encode_png(
    image,
    fh,
    filter=pymtpng.Filter.Adaptive,
    compression_level=pymtpng.CompressionLevel.Fast,
    strategy=pymtpng.Strategy.Huffman,
)

# Store key-value pairs as iTXt chunks
pymtpng.encode_png(image, fh, info={"Hello": "World"})

Metadata

Release files for pymtpng 1.1.0

For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.

Source distribution (sdist)

Source distribution for pymtpng 1.1.0
File	Size	Uploaded
pymtpng-1.1.0.tar.gz	24.5 kB	Jul 26, 2026	Details

Built distributions (wheels)

Table of built distributions (wheels) for pymtpng 1.1.0
File	Interpreter	ABI	Platform	Reset
pymtpng-1.1.0-cp312-abi3-win_amd64.whl 220.9 kB Jul 26, 2026	CPython 3.12	abi3	Windows x86-64	Details
pymtpng-1.1.0-cp312-abi3-manylinux_2_34_x86_64.whl 636.2 kB Jul 26, 2026	CPython 3.12	abi3	Linux glibc 2.34+ x86-64	Details

Total release size: 881.7 kB

Release files / pymtpng-1.1.0.tar.gz

Download URL	pymtpng-1.1.0.tar.gz
Size	24.5 kB
Tags	Source
SHA-256 checksum How to use checksums	`e019222e2eedd97bb7f4ce8d3377ca4769a72815932a4861e541bed3d9ddb239`
BLAKE2b-256 checksum How to use checksums	`2afeee866f4a0886f84ea1129fdc816ca3720e4bf31fba693fe38d28d7087217`
Upload date	Jul 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Provenance describes where a file came from. On PyPI, provenance is shared via attestations, which provide a verifiable record of the build or publishing details. View details, limitations and caveats.

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/pwuertz/pymtpng
Publishing commit: github.com/pwuertz/pymtpng/tree/9bd5f50d61b19c68363df5c4cf424e181ea5cf64

Workflow

Publishing configuration: github.com/pwuertz/pymtpng/blob/9bd5f50d61b19c68363df5c4cf424e181ea5cf64/.github/workflows/pypi-packages.yml
Publishing logs: github.com/pwuertz/pymtpng/actions/runs/30197369994/attempts/1

Artifact

Subject: pymtpng-1.1.0.tar.gz
SHA-256 checksum: e019222e2eedd97bb7f4ce8d3377ca4769a72815932a4861e541bed3d9ddb239 Verifying attestations

Release files / pymtpng-1.1.0-cp312-abi3-win_amd64.whl

Download URL	pymtpng-1.1.0-cp312-abi3-win_amd64.whl
Size	220.9 kB
Tags	CPython 3.12 Windows x86-64 abi3
SHA-256 checksum How to use checksums	`43fd96e68d130f1a0af94ee5fe186472696386c57ebf230c0473b2f9118159dd`
BLAKE2b-256 checksum How to use checksums	`8bb0467884bcfbd559237699df095e1e0acc66a46ab1be5e3fa44463e72a65e0`
Upload date	Jul 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/pwuertz/pymtpng
Publishing commit: github.com/pwuertz/pymtpng/tree/9bd5f50d61b19c68363df5c4cf424e181ea5cf64

Workflow

Publishing configuration: github.com/pwuertz/pymtpng/blob/9bd5f50d61b19c68363df5c4cf424e181ea5cf64/.github/workflows/pypi-packages.yml
Publishing logs: github.com/pwuertz/pymtpng/actions/runs/30197369994/attempts/1

Artifact

Subject: pymtpng-1.1.0-cp312-abi3-win_amd64.whl
SHA-256 checksum: 43fd96e68d130f1a0af94ee5fe186472696386c57ebf230c0473b2f9118159dd Verifying attestations

Release files / pymtpng-1.1.0-cp312-abi3-manylinux_2_34_x86_64.whl

Download URL	pymtpng-1.1.0-cp312-abi3-manylinux_2_34_x86_64.whl
Size	636.2 kB
Tags	CPython 3.12 Linux glibc 2.34+ x86-64 abi3
SHA-256 checksum How to use checksums	`73b47747483a44b3091ba8fdf3ddcbeab9cf3931f0be1d28131cb2b0210c2c92`
BLAKE2b-256 checksum How to use checksums	`99ae1b8155695bd14c8b89ed260130842d0a5594efa4083109d5096e4caa64ef`
Upload date	Jul 26, 2026
Uploaded using Trusted Publishing? What is trusted publishing?	Yes
Uploaded via	`twine/6.1.0 CPython/3.13.14`

Provenance

Identity

Publishing platform: GitHub Actions
Publishing repository: github.com/pwuertz/pymtpng
Publishing commit: github.com/pwuertz/pymtpng/tree/9bd5f50d61b19c68363df5c4cf424e181ea5cf64

Workflow

Publishing configuration: github.com/pwuertz/pymtpng/blob/9bd5f50d61b19c68363df5c4cf424e181ea5cf64/.github/workflows/pypi-packages.yml
Publishing logs: github.com/pwuertz/pymtpng/actions/runs/30197369994/attempts/1

Artifact

Subject: pymtpng-1.1.0-cp312-abi3-manylinux_2_34_x86_64.whl
SHA-256 checksum: 73b47747483a44b3091ba8fdf3ddcbeab9cf3931f0be1d28131cb2b0210c2c92 Verifying attestations