Componentpedia / Listings / fdeflate

Last update: 15/09/2025

fdeflate

Fast deflate implementation specialized for PNG image data

Latest version: 0.3.7 registry icon
Maintenance score
100
Safety score
100
Popularity score
72
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Security
  Vulnerabilities
Version Suggest Low Medium High Critical
0.3.7 0 0 0 0 0
0.3.6 0 0 0 0 0
0.3.5 0 0 0 0 0
0.3.4 0 0 0 0 0
0.3.3 0 0 0 0 0
0.3.2 0 0 0 0 0
0.3.1 0 0 0 0 0
0.3.0 0 0 0 0 0
0.2.1 0 0 0 0 0
0.2.0 0 0 0 0 0
0.1.1 0 0 0 0 0
0.1.0 0 0 0 0 0

Stability
Latest release:

0.3.7 - This version is safe to use because it has no known security vulnerabilities at this time. Find out if your coding project uses this component and get notified of any reported security vulnerabilities with Meterian-X Open Source Security Platform

Licensing

Maintain your licence declarations and avoid unwanted licences to protect your IP the way you intended.

Apache-2.0   -   Apache License 2.0

Not a wildcard

Not proprietary

OSI Compliant

MIT   -   MIT License

Not a wildcard

Not proprietary

OSI Compliant

fdeflate

crates.io Documentation Build Status

A fast and safe deflate implementation for PNG.

This crate contains an optimized implementation of the deflate algorithm tuned for PNG images.

At least on PNG data, our decoder rivals the performance of zlib-ng and zlib-rs without using any unsafe code.

When compressing it makes a bunch of simplifying assumptions that drastically improve encoding speed while still being compatible with zlib:

  • Exactly one block per deflate stream.
  • No distance codes except for run length encoding of zeros.
  • A single fixed huffman tree trained on a large corpus of PNG images.
  • All huffman codes are <= 12 bits.

Inspiration

The algorithms in this crate take inspiration from multiple sources: